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Models 69NT20-284 69NT40-461 69NT40-464

1. UNITS WITH TWO SPEED EVAPORATOR MOTORS Power Supply and In Range Board Timing and Current Control Board Temperature Control Board Fuse Location 3A Temperature Simulator S witch Defrost Interval Selector Set Temperature Display Switch Time Delay Override Switch Temperature Selector Condenser Fan Motor Relay Hour Meter Optional Heat Relay Compressor Contactor Evaporator Fan Motor Relay High Speed 15 16 17 18 19 20 21 22 23 24 25 26 27 Evaporator Fan Motor Relay Low Speed Voltage Switch Circuit Breaker 230v Circuit Breaker 460v Control Fuse 6A Control Transformer Current Limiting Transformer Location Digital Temperature Display Humidistat
2. B D E F G H I J K L M N 0 i 10 4 50 CABLE POWER PLUG cei 450V E RI lt 121 460 3 50 52 lt Tal los 380 3 50 18 Ma 13 3 lt 5 LTT 111 21 2 230v pee TA s 12 22 n LR 131 123 v 23023 80 gt x 3 gt m m Ney ee Ve 021 161 5 5 l e 5 8 4 50 5 111121 131 23 5 1 2 121 22 6 13 7 er O1 STS ciUc2 4 2 2 SST TBE 255 T 1029 2 1 9 P2 pee IP CM 185 IP CP TB3 HPS m A 1 P SE Be S19 ESQ RM
3. icem bes q J N 4 ON gt ERI imi gt J o 842 4 lt ores Aa ess oes eee NU B eR 282 8 u Xo o9 Cels Ph xb 1814 vnu 2 p 3911 et Nay c S 411 48 Sa Ikon o 4lt Ore B Rp aH 4 T D alt 6 11324 s ee Ko XE uo ins Reza C abu Dena pee B an Tien tach Dy 4 22 8 MK PE 1998 lt 2 Seque ig gt Xo 8 E HN kk BE T 122 gt 2 04 2 E I amp 263 5 E132 2253
4. 1 2 n HRCtTe R nH e r T16 e BR 5 4 v 12 T17 e BR 2 R M VSB4 N be i Cov apo TB2 BRN 4 FCLT 4 TB6 RE o HR1 N Re Eno aes W gt x lt o TB7 BLK gt DX BK m els W BK lt Y cca D T1 BK 2 m E o gt ll R Cc13 0 PREFESTER N 2 Ta m C124 N N DHTLN DEY iu CB1 gt 1 S Rebus 1 EMT4 QF 23 s KEIN HL TX 4 H DEO AH
5. D E F H I J K L M N 9 8 4 50 TRANS AUTO VS POWER PLUG CABLE 2 230V CLT 1 apes A2 T1 HO B2 2 0 2 80 2 2 5 B2 81 121 22 jus 190 3 50 lt P 77 Er 2 ler HR 131123 E 4 6 T FH 1 10 4 50 us 121122 POWER PLUG 3 RI lt t BK Be md I II I 460 360 52 lt sata 554 8 58 5 380 3 50 1 8 13 4 Le 11 21 aa 777 lt TR Tal 23 H3 H2 ES 5 s EF 211 h1 x2 24 211 11 221 12 221 12 2313 231 a gt T 2 TB2 1 SST H3 IP EM 255 P1 P2 P2 1 A N a 8 cov 5162 2 E vx CL 1 5 251 eX n u B 1 i TH HTT PA HR ER ees uu 11 IRS D b RI T24 2 38 pR mis ts Ata 12 5 DR T4 ai Pai VA c1
6. Sheet 1 of 2 5 16 00 Figure 5 8 Electrical Wiring Diagram M 69NT40 464 2 REV aes d d Gib E N J LI OO 00 O0 90 Or Gre 5 5 2 X x x MG ta 695b ni Gc COO LES LSS G 03503 121 PA 000 5 9 0 ohh LHE Gu VO que Re e Ren 2 Jo n1 01 21 HL 78601 915 140 ad V S 5 5 2 pa x o N a z E oK 8 N3519v 5 5 U gaa z 915 1 m 2 609 13 915 45 z ers s 0510 5 S 2112 9551 9 5 taa 5 915 aH 5 51 Q
7. o CLT 10 4 50 CABLE POWER PLUG 460 a RI lt a 121 460 350 52 lt 2 a3 4154 380 3 50 13 R 13 23 ca 154 13 123 G m Fh vs 11121 2 230v T gt 121 122 al 4 SX ete 230 3 60 w M l h 123 q o8 22 ES 28 i 28 190 3 50 8 s cal le 22 55 5 E 8 4 50 CABLE 111121 131123 121 E 121 122 6 23 2 a is cov Ov aS 1029 pe oR e 9 2 UVT 2 FO 0 0 yay De IP CM 785 TB3 HPS v Ta 1 P SE Be 99 ESQ RM Be CU OR EF 1 re ns S H HTT AU HR r1 Ta rg Tio 99 DR 2 J RM RM RM 66 RM My 4p 60 TRL T24 123 MDS x 777 smv 2 P13 2 1213 4 5 5 7 polo 69 5 o a 5 505 18 71651435121 ay PLATE DD 88888 69NT20 3243 FOR REORDERING SPECIFY ARTWORK CTD P N 69NT20 373 1
8. 281 Bau 1 2 ny 981 e 18 o 8 R lt L Lasa 111 RXTenao 0 C4505 o9 gt 8 E HA 5 ouH 6 999 m 5 He lt gt Cad lt lt 84 2 tn eh 911 9 19 OHE 2814 9 E sS HQ 535 T pee Fe 2 a m dn ei o Oro 9 8 ARE 555 5 5 gt Ly R8 Z194 EFSA 2 Heb RH a E a HHO 183 i SPO CN Sails Ou 4 lt T a m m 5 5 are 1 18 Po 1 D 2 SM red LEASA x 8 a 5 5 1 2949 NT NQ Cp dba _ x 81 ta BE 1491 L LdSA gt gt 26 amp amp
9. Sheet 2 of 2 5 17 Figure 5 8 Electrical Wiring Diagram M odel 69NT40 464 2 281 NU8 481 0 034 4 gt o B 981 178 E F 105A 1282 a CY lt oue LIHSA se ie DP 828 gt m E ele HZOSA peas X XS i ole 104 211 124 N 292 c Mee 20437 Y 5 Sid ey g5 194 HEXSA lt gt 8 x Eo 1334 ap IN 545545 5 ele x CEDO GH op Il N m 1 a Mi ie VISA abn ape iE sh OC 22 wos Kapa 1324 LEASA x 8 eun X2 5 S Li d Pene GO iro EM ge US A N N 4 ER 55 11494 wea alla 15 u SVG io Lo REEF of ieo 09 12 E 6 ne E
10. a Pl m a N 5958 6058 2 g noe 5 Exe FEL A uci Se OON ea UA AN OO OIG 990 GND 247 i D e 999961615 SOLO 24 FUSED 12V DW X e o m E TU TC TH SMV 1 2 3 4 SENSOR S A SENSOR R A EQ gt zu 8 SEN gt RS2 RS4 0 U RR1I RRI N 006 7 516 Nrss347 g 12131445 00546 5 516 i TEMP METER LET 516 6 T244 8 Lssp po4 T556 6 004 5 SIG GND 5 25 amp 4 e 4 5 AZ R m TEMP SELECT UEM 6 4 0153 1552 3 00212 59 11213 1 lel 81 DIS 551 1 1 T d 24 2 5 5 001 11 12 banyan oe u 2 m sec 1 Forsi wa 1 US SELECT g A A DFT TIME x a TEMPERATURE CONTROL Qsc v SWITCH el TIMING amp CURRENT CONTROL C C DTE 9 9 YE POWER SUPPLY amp IRS 7 B
11. B G H I J K R e 10 4 50 CABLE NS POWER PLUG 450V RI lt BK TT 111 21 3 1 52 lt m 460 3 60 2 52 121 22 380 3 50 12e Vag Vica Ta 123 1 lt 6 z 477 NS 11121 LI 121 22 mrs A4 MERI 23073 60 13 23 amp ES x X 190 3 50 TS E m m Lo 111 21 23 111121 E 6 AMP 18 23 c 4 TB2 UV 2 SST TB6 Sev IP EM oo P1 525 2 8 CHT ct 2 TE IP CM TBS IP cP TB3 HPS 7 Yat 1 Pi P2 59 5 B8 pq RM RM BS DR TD EF o 19 T18 Crece E Noy HI HR T9 Fre Tiol 1111 Uca DR T19 T20 RM RM m D ARL IRS lt lt 00 X NYY IRI 1241 123 MDS rp Fh M 2 2 13 14 15 16 17 2122 uns DR 78 iT mr 4r P P13 2 1 2 3 4 5 6 gt E 69 o TDS 505 h 28 56 aD PLATE DD 88888 5 1 457 FOR REORDERING SPECIFY ARTWORK 69 35 9144 REV 10 11 12 13 14 15 16 17 18
12. o N 1 0 3 8 7 DD 6 88888 505 ag 4855 PLATE B9NT35 2367 ARTWORK 69 35 1238 REV 10 11 12 13 14 15 16 17 18 FOR REORDERING SPECIFY CTD P N 69 3 20 373 139 Figure 5 29 Electrical Wiring Schematic 69NT40 464 12 Sheet 2 of 2 5 59 Sheet 1 of 2 5 60
13. lt lt 15 a 3 16 13 N 14 12 8 2 17 10 P No No m zz 11 9 a is 4 rt Ls 5 N 219 364 7 5 1 1 Suction Service Valve 2 Discharge Service Valve 3 Air Cooled Condenser 4 Water Cooled Condenser or Receiver 5 Sight Glass 6 Water Outlet 7 Water Inlet 8 Pressure Relief Valve High Side 9 Pressure Relief Valve Low Side 10 Liquid Line Valve 11 Filter Drier 12 Moisture Liquid Indicator 13 Expansion Valve 14 External Equalizer Line 15 Expansion Valve Bulb 16 Evaporator 17 Suction Solenoid Valve 69 40 18 Modulating Solenoid Valve 19 Quench Valve Solenoid or Thermostatic Figure 1 6 Refrigeration Circuit When operating with the air cooled condenser the gas flows through the discharge service valve into the air cooled condenser A ir flowing acrossthe coil fins and tubes cools the gas to saturation temperature By removing latent heat the gas condenses to a hot liquid and then flows to the water cooled condenser receiver which stores the additional charge necessary for low temperature operation When operating with the water cooled condenser the hot gas flows through the air cooled condenser and into the water co
14. Access Panel Evaporator Fan Motor 2 11 Access Panel Heater Location 12 TIR Locking Devices 13 Recording Thermometer 14 Make Up Air Cover 15 Unit Serial Model No Plate Location 16 Power Cables and Plug 17 Power Transformer Location 18 Discharge Service Valve 19 Compressor Sight Glass High Pressure Switch Compressor Remote Monitoring Receptacle RM Manual Defrost Switch Start Stop Switch Condenser Fan and Motor Fork Lift Pockets Thermostatic Expansion Valve Location Access Panel Evaporator Fan Motor 1 Figure 1 1 Refrigeration Unit Front 1 3 URS CS A 13 Evaporator Fan Motor 1 8 Return Air Temperature Sensor Humidistat Location Optional 9 Evaporator Coil Heaters Air Pressure Switch 10 Defrost Termina
15. Refrigerant Recovery Unit Refrigerant Cylinder Evacuation Manifold Valve Vacuum Pump Electronic Vacuum Gauge Liquid Line Valve Condenser Coil Suction Service Valve Compressor Discharge Service Valve Evaporator Coil Figure 4 1 Vacuum Pump Connections a Remove all refrigerant using a refrigerant recovery system b The recommended method to evacuate and dehydrate the system is to connect three evacuation hoses 0 not use standard service hoses as they not suited for evacuation purposes as shown in Figure 4 1 to the vacuum pump and refrigeration unit Also as shown connect a evacuation manifold with evacuation hoses only to the vacuum pump electronic vacuum gauge and refrigerant recovery system c With the unit service valves closed back seated and the vacuum pump and electronic vacuum gauge valves open start the pump and draw a deep vacuum Shut off the pump and check to see if the vacuum holds This operation is to test the evacuation setup for leaks repair if necessary d Midseat the refrigerant system service valves Thenopen the vacuum pump and electronic vacuum gauge valves if they are not already open Start the vacuum pump E vacuate unit until the electronic vacuum gauge indic
16. Sheet 1 of 2 5 52 DD Figure 5 26 Electrical Wiring Schematic M 69NT40 464 9 15 62 Yo 1 N o a le gt gt gt o c OF J qo um To m nin Poe ten AN uu O0 210 Oe QNO Ov L wos m e e Fe la IQ oe OG fe alla 6 o JA 03524 ovare _ CHE 9 9 9 8 lti ane 8 zlee z e v a AL a OL 21 f HL AWS OL w916 14 NIGTHOSNSS V7H7HOSNaS _ u u 5 5 N E Je E m 8 Nas 10v 9 9 i 4 z U amp zreT Ta 999 2 ers lt 51 2 B e 5409 915 es 916 shosia 179 9551 19 s 9 915 52519 1 c 193796 5 4 a afe jestad gt 611 N tL e e o 5 8 2 uH
17. 6 H I J K L M 0 P Q R Q 10 4 50 CABLE POWER PLUG cel 460V lt 21 460 3 60 52 lt gt 1 380 3 50 TS 1 cc 131123 lt 6 230v Te 12 22 ro a en 2303 60 W 217 mi 112 131 123 7 190 3 50 R ESE g 3 5 c2l lcr E 8 lt 8 4 50 ri CABLE ilz xi x2 24VAC val es nz 121 122 131 23 WP CF ee 1002 782 2 SST ay TB6 Assy P2 P2 TT 2 CHT 9 yt TC IP CDM TBS HPS T7 CL 1 82 oe PA RM RM Be e m EF T alles HL TH HIT A HR m 2 oR 4 T19 20 PON RM RM RM RM D n Di IRL T24 123 A o FT NDS io A DIT 2 iT 5 17 21 22 jns DR Tm ye mre im p P13 2 te BEE 1 2 3 4 5 1 190 OT gt 5 559 505 PLATE 284 8 198187165142 69NT35 9873 DD 88888 ARTWORK 69NT35 8344 REV FOR REORDERING SPECIFY CTD P N B8NT20 373 102 J Figure 5 5 Electri
18. Figure 5 30 Electrical Wiring Schematic 69NT40 464 12 A N a a le Sear gt o ee J 11 P nin N OOOO 5 619 Oe 568 lee OO OO 00 O88 QN9 ONAvC X LL WOO x 0 9 m OG NA o 0 o o A V la 0354 ovare p 3 696 d om ane 8 AL 51 31 of ors 149 xd V S HOSNAS u w 5 5 5 N 8 N35 1ov 9 2 2 U saa 2 gt 4 E et 2 BC aya 9008 915 8 5 ais shsia 2 Q Hs 9sS14 9 s jans 915 5 25107 5 E 193135 dn aaaas S IN 5591 Woo festa 8 3 611 sect tele Naa e e o 5 2 4 t amp 2 55187 X a 1 mao TOR 5 1581 Jw Hunn nom E 2 mom 285 os Hsia
19. B D G H I J K L M N R 8 4 Y CABLE TRANS AUTO POWER PLUG re 230V cT SEEN A21 61 B2 250 3760 Bui 2 821 IBI 121 22 190 3 50 621 131 63 H3 Legs L 77 11121 DHTL DHBL 10 4 50 121 22 POWER PLUG CABLE Col eov 131 23 a DHML DHTR 460 3 60 52 TW 12 22 831 gt 289 3290 nga n 4 5 gt HBR TR H4 1 3 5 EAA CM POY 21 24VAC 4 8 F 23 8 E 211 211 11 22 Ire ST 221 12 3 TB2 uv 23 13 251 1 tas 29 P1 P2 P2 P1 0 0 m spi IP 8 3 i ou im 92 02 2229 A 27 A TU H KR T35 P Re S D m 2 5 T27 1726 NU KR CR TH HTT HR iz zh rio py DR TDT 1 CR T20 2 6l 30 xf RM QRM cS EZ ce 1D 2 Ty 55 5 Ta is ers s na ella 30 TU EF ES F2 Tal Fra Ata ci ica 3 gt 2 t 777 2 1 24121113 14 15 17 21 22 29 30 39 Fl IRS OR 1 ye pue inu CONTROLLER 3 amp P7 PB PS
20. DD r p ly 15 N o a le gt gt OEY Z o Or N 2 9 11 P nin 949 AN Pa O 2 O9 210 v ovXvz ul oa E Og T gt 9 m n S SZ lo o Oe 9 06 _ claw ood 96 xL ltd o X allele z e v a AL OL 21 HL AWS OL ors 14 V H7HOGNAS _ u gt 5 N amp c NE 8 N35 1ov 9 9 U saa z 915 D ESSL ygan 900 9 915 4 5 915 170 9551 9 s 915 uH 5 25187 on 192735 5 4 Hm wi jesta 2 lt 6 0 e e v s 9 2 51 NJ 2551 22241 ah E 255104 4 iaa t azt co ONNIN O 5 159142 p avggnonam 385 s ra PEN in N 1222 193135 n N 7051409 3HnlVH3dHil Te AWIL 140 UN JOHINOO 8 ONIWIL aG HOLIMS p in 5107272 01 3 S AL 581 3 v x1 J3uvdS NY
21. B D E F G 1 K L M N 9 R 19 4 50 CABLE vs POWER PLUG 460V gt RI lt at as 121 460 3 50 52 lt 2 83 380 3 50 R 13 Vag 554 cata 2 3 lt e 717 ws 111 21 230v T 71 121 122 n T BK 4 INT 5 S 131 23 9 230 3 60 190850 ear ie 5E mE 021 161 amp gt l c r4 8 4 50 5 CABLE 111121 EF 6 11 f21 121 22 6 13 23 7 cr O1 OT o 1Uc2 ST 8 TB2 55 m TB6 7 1029 2 1 9 P2 quem T83 ups 1731 P bbe SL Be 9 ESQ MAS R gt TC TH HTT HR tio cae ciUca DR 12 Iris DR Se T19 22 ah RM RM 3 13 185 lt lt 6 IRL T24 123 MDS imp T smv 2 OTi 15 10 1 1 P13 2 2 3 4 D T2 8 T4 sTe 7 16 PL 5 STS RTS 17 6 TDS gt s 18 505 ie BB am PLATE DD 88888 35 2037 FOR REORDERING SPECIFY 19 ARTWORK 69 35 9894 REV 20 373 132 XS Sheet 2 of 2 5 47 Figure 5 23 Electrical Wiring Schematic 69NT40 464 7
22. 230 3 60 Sheet 2 of 2 5 13 Figure 5 6 Electrical Wiring Diagram M 69NT40 464 1 81 9 Nu8 481 48 E zx 981 18 Ora L 1 aSA 2 Pos CX Leno lt DID E HSA logon 4 9 828 ell 5 ub wen A AEN gt eai TX 5 982 12 De 2 Nop 1l TS ped 282 P x CY yee eub 1 20437 EZI 2 5 133 Hda m p CODE cn OIO gt 21334 k 5454454 Koo D AX ero lt CPC T WW 1va0 4X M N f t t
23. 3 3 3 8 Abnormal Noise Or Vibrations ee 3 3 3 9 Temperature Controller Malfunction 3 3 3 10 No Evaporator Air Flow Or Restricted Air 3 3 3 11 Expansion Valve Malfunction mnn 3 4 3 12 Water Cooled Condenser Or Water Pressure Switch Malfunction 3 4 3 13 Step U p Power Transformer alfunction 3 4 TABLE OF CONTENTS CONTINUED Section Page 4 SERVICE KS Wee OEC 4 1 41 Removing The Refrigerant 4 1 4 2 Refrigerant Leak 0 4 1 4 3 Evacuation And Dehydration 4 1 4 3 1 General tid wid iac Bayne idee i d atn haw ated 4 1 4 3 2 Preparation iba LES 4 1 4 3 3 Procedure oe GR d 4 1 4 4 Adding Or Checking The Refrigerant Charge 4 2 4 4 1 Checking The Refrigerant Charge 4 2 4 4 2 Adding Refrigerant To System Full Charge 4 2 4 4 3 Adding Refrigerant System Partial Charge 4 2 4 5 Replacing Compressor 4 3 4 6 Compressor 1
24. ARTWORK NT NM Las el N enw o 0 gt gt gt Li o a t NI Spr GOOD OO 3 Hi o Hio m m D O 9 2 n oo09 o06066 9 O 508 2v OVAvVC T F 5 5 JO c gt Le OF ole lt OC ORG 2 dasni 1 T o eee o 6 90605006 o M v A AL 91 21 H1 AWS Ol 139 ud V 8 H0SN35 VU YOSNAS a M 2 c 8 Nas 19v m wo 80072 91S 931 z B essi 2 z EE 5514415 Aygin awa D 0019 9IS 4 S rs 5167 2 zi1 5 915 5 25107 A 55 8 1139 eaae woo oa 123786 3 b Hesia ES c 91 93895 61 zaa 2 e 9 SAY 2551 amp rT iTe e e s s z I 1004 L Az abit 2 ssi 5 4 onnyt AN 2 DONN oas 08 1 15 o 2222 193135 9 m 130 T aL JOHINOO Q Sit m HOLIMS X JOHINOO 8 ONIWIL X 51023 oL T n 541 3 14405 H3MOd a lo amp N 45 NS Ub diu ro a 5 elo UT oO
25. 84 ___ 1 c21 Shea Oe CPB TBS PLATE 59NT20 3133 ARTWORK lt 69 20 3524 REV Figure 5 16 Electrical Wiring Diagram M odel 69NT20 284 1 amp 284 2 Sheet 2 of 2 5 33 LINE K14 N2 M8 L18 L13 N3 12 13 615 K14 L6 M12 112 P6 P7 E8 G68 112 12 66 15 0 x o N lt 69 I9 J9 K9 L8 ES E10 J15 P17 610 115 612 15 115 15 1 19 017 L 2 4 SYMBOL APS C HT HBL HBR HTL HTR 15 lt TRANS AUTO TSS TT UV vS ND DESCRIPTION AIR PRESSURE SWITCH COMPRESSOR CONTACTOR CIRCUIT BREAKER 460V CIRCUIT BREAKER 230V CAPILLARY DE SUPERHEATER VALVE R22 OPTION CONDENSER FAN CONTACTOR CYLINDER HEAD THERMOSTAT R22 OPTION COOL LIGHT WHITE CONDENSER FAN MOTOR COMPRESSOR MOTOR TEMPERATURE SET STATION CURRENT LIMITING TRANSFORMER DIGITAL DISPLAY DEFROST HEATER BOTTOM LEFT DEFROST HEATER BOTTOM RIGHT DEFROST HEATER TOP LEFT DEFROST HEATER TOP RIGHT DEFROST INTERVAL SELECTOR DEFROST LIGHT AMBER DRAIN PAN HEATER DEFROST RELAY DEFROST TERMINATION THERMOSTAT EVAPORATOR FAN CONTACTOR HIGH SPEED EVAPORATOR FAN MOTOR EVAPORATOR FAN CONTACTOR LOW SPEED FUSE FULL LOAD AMPS HEAT
26. C2 TB3 5 pr F1 DR 3 lamp 2 3 4 5 E 1235678 22 TU 9 10 11 13 11213117112 3 4 516 2 3 4 1 2 3 4 5 B Energized Circuit De energized Circuit Figure 2 2 Heating Within 2 3 6 F of Set Point b Heating SeeFigure 2 2 The unit will only heat when the controller is set above 10 C 14 F asrelay TH iselectronically locked out to prevent heating when the controller is set below 10 C 14 F If the supply air temperature decreases 1 0 C 1 8 F below controller set point TH closes and the system entersthe heating mode which is designed to raise the container air temperature When TH closes power flows through the TC contacts T9 and T8 TH contacts the heat termination thermostat to energize the heat relay HR This in turn energizes the heaters and heat light The evaporator fans continue to run in high speed to circulate air throughout the container Asthe supply air decreasesto 2 C 3 6 F below set point relay IR S and the in range light de
27. oe ciUca oR 2 m T19 1720 IRS ay 124 23 pq T 29 so P13 1 213 4 5 6 7 105 489 FOR REORDERING SPECIFY CTD P N 69NT20 373 113 J M Figure 5 15 Electrical Wiring Schematic M odel 69NT20 284 1 amp 284 2 Sheet 2 of 2 5 31 10 11 12 13 14 15 16 17 18 g 9 Ti 110 T8 I HTT M DTT MDS2 DIT EFC DL i 1 lt Osc 132 9 PODS P64 P131 P133 P135
28. 2 5510 pe jJ 0538 935 08 1 1510 22 8688 422221 193736 g 140 c 1081802 SHAIVHIdNI UN ET I HOLIMS 108102 1 388402 3 76107272 OL ca 9 9 8 L SUI 474405 7 AMY x N 38Vd5 5 11 11 4 1 U am EN wo cr Li OOO uela Ai __ 505 y a a f gt E amp 25 T oT e555 m ye ts 25 oo 5555 go psss 9 SU Begol xm E a e xA 9855 1 Lo 8 a 8 g 8 2 Di 8 14d a lt i ONG xo Qui szd EG 5 i N 68421 44d Lo 4 M m 2 lt gt OE 5 E E amp Ho C m 19394 E RO 5 Lm DD ARTWORK 69NT20 3474 REV Figure 5 2 Electrical Wiring Diagram M odel 69NT 20 284 Sheet 1 of 2 5 4
29. DHBL Py YE HR22 M N vsp4 VSK4 m m m r1 l F22 4 Gyo EF21 HR21 DATE 434 A 1 DHBR VSV4 vsv1 VSJ4 d HR23 DHTR 141 2 H vse3 EMI 2 DPH gus EF23 22 I T1 P2 enr EMG x 8 oi EMP2 AAA JO RTS GRD STS Y NN nmm N MN Um la SES mx 9 9 Fe N M ON lt 0 mu 6 T iu iud SEAT SE ONO SRR ore e pee EE ee CF 3 2 3 2 5 3 2 5 C al lic D EMT ZYY 5 6 Gu Ee amp 525 975262 28 5 EMG AU Q 11 um VSV2 EF21 2 DHBL TRH1 CPAS 12 erri 2 DPH c22 13 t 07910191919 OOOO T P NE BJ H D B VS 2 21 3 2 ifs 2 3 2 3 2 2 3 2 3 2 3 2 OBO 3 9 vsP4
30. PA YN NN MONN N MN ERER LAX9 0 Fe N M ON 1 lt NO _ Ww T E T iu iu I SO PIX Ce arse iE ee CR 2 2 2 5 3 2 5 ma Taag Taare ZYY gt Fenroa 5 sange 59525 975262 X MG A Q UPS 7 1 um pam VSV2 21 CF23 DHBL TRH1 CPAS c12 ci er 2 c22 t7 t 1 7 990000 OOOH OV T P H D C B A VS 22 2 2 3 f2 3 2 3 2 3 C2 2 3 2 2 3 2 OBOE 3 9 VSP4 EMT3 CF21 HR22 CPA2 4 EF23 EMT3 HR23 TRH3 Wo de o TRX2 5 CO SEP r22 c21 T21 VSJ2 VSL2 SA 5 rti S te 000 1009 29 rss 5 A 5 0 vSb2 y EET TR 74 CM VSN1 3 N 43 Esra crF23 5 TO Aa ME NES 2 2 63 vs
31. gt 03503 ovArz A o else o 6 56 ee he cv gt fi 01 21 AWS 01 5916 13 ud V S H05N3 HOSN3S g 5 N 8 35712 5 U Saa4 2 916 2 KERE 609 13 915 45 f 518 32139 901 915 0514 8 S 2119 raa 5 0 9 915 w e s S Q eaa woo 2 199136 dN31 9 p Hesi x SI tele e 112 0 m 91 03395 zi 92 51 10041 azi 51 112161715192 2 ssia 5 1501 42 r Gao aT IL 22 85258 235 11 151 QN N 2222 193135 g x iD N TOYLNOD 3Uni1VH3dW3l a 3411 130 a QE WI OI Des Qo er P6544 lt gt Sheet 1 of 2 5 20 134 105 7 SAE P64 P131 133 135 132 P62 00 ng 1081 02 1 8 2 3 ONIWIL TX T HOLINS m SUI 3 AlddnS U3M0d im 6107272 01 Q 8 9 p j esas m an 23 g ER ER L
32. CONTROLLER RELAY HEATING RANSF ORMER EM U PER OAD ATURE SIMULATOR SWITCH ER VALVE R22 OPTION WAT ER PRESSURE SWITCH OPTIONAL Figure 5 29 Electrical Wiring Schematic M odel 69NT40 464 12 Sheet 1 of 2 5 5 8 B D E F G H J K L M N 11 4 CABLE POWER PLUG RI lt ay 1 S 460 3 60 52 a2 121 122 2 380 3 50 lt 13 23 13 123 B3 lt 6 11 21 777 121 22 123 c c T lt amp a 4 M Fs 35 M 111121 x 4 8 24VAC 731 bes rH 11 21 3 8 12 22 13 123 e cr 9 19 6762 3 5 M s 2 2 SST 4 8 TBE ASSV 777 P1 P2 P1 P2 8 pepy 21762 1 785 TB3 HPS Xu Sa ci Br ope 855 Ba 99 S B brat AU HR re 1111 2 DR EF 19 18 62 DR 20 oe Ri RM RM 185 3 T24 123
33. Figure 5 4 Electrical Wiring Diagram 69NT 40 464 dg Mes gh TLE ged LI e zm E X N J Pr TT T LIE 9000 66 6 T 5 0 9 OV d amp lt 5 OC COO GG 03503 121 PA N ry GH9G COS OOS OA Tc M n gt Jo n1 01 21 Hl 78601 91S 140 ud V S YONI V H BOSNUS 2 5 x N B ae 8 N3519v 5 Ly a gaa 2 915 1 m essi 2 KERE 609 13 915 45 f ers 3 0510 5 S 2112 9651 9 vaa 5 915 5 i 551 5 9 1179 ssai p QQ E 20 199736 9 b ESI V a le e t m e0 s LW cis isate taa 1 1 eis a tae z ssia AR P 22 BARRA 285 Fist 4 2 2 T p 193135 LW N BIL 140 OWING TIX e E aL 9NIMIL TX one P 8 me Lh SUI 3 AlddnS U3M0d im 20597901 N In 8 e m N ENZA mon E to NM 11 2505 500 don ot
34. PI P2 2 ciLlc2 CHT IP DM 785 HPS m Nat 5 sa DA RM sS DR alles HL 1 HIT DA s hs 1 TE oR TIS T20 RM f RM RM RM D 185 gt IRL T24 T23 MDS rm 777 iy 2 iT 5 re 17 21 22 uns DR ft qum P13 2 NER 7 2 3 4 5 e ES 5 5 2 105 5 505 1 2 3 4 5 148181216 514131211 ag PLATE 00 88888 FOR REORDERING SPECIFY ARTWORK 69 35 8244 REV CTD P N B8NT20 373 100 J Figure 5 3 Electrical Wiring Schematic M odel 69NT 40 464 Sheet 2 of 2 5 7 M051 5 5 8 Sheet 1 of 2 P64 P131 P133P135 P62 00
35. 4P11 P13 Ne 2 314 5 6 7 TeBE Ee 1T2T3 12 13 T4 T8 T6 JAg 218 a4 2 214 Se gt NI 7 5 5 NP 558 5 5 1 Qo 0 651 2 Qo KD RRI I 585 is pepa eea Oo RS2 1 2 3 4 Qeli ao tas 124 2 m 1 VV lesa 5752 RRS ARTWORK 9 35 8924 REV PLATE 35 1237 20 FOR REORDERING SPECIFY CTD P N 6SNT20 373 112 Figure 5 13 Electrical Wiring Schematic M 69NT40 464 3 Sheet 2 of 2 5 27 Sheet 1 of 2 5 28
36. 25 4 iis Sy gt NEM l 1304 L eASA zeod PA ac 8 eun X2 tres 8 H 5 5 DIO PESE Puer WAP 18 o6 r iHa H Y HYSA Pu oo 5 gt lao lado 119 r i TAR zi mM 109 IA EYE S Jena Y WNOL1d0 om EPIA US 9 en Ti ER FCNSA ioo iu uaa CRX BE eza ZIW 59 56 5 i 1W9 0 112 exo 01140 m mona V LX g 9 j ZA5A4 CN NY 3 2 3 3 m we ge T 5 Ld En 11 Qe brl1 el 4 zina X gt eran gt DIU 27 122 rs ke 5 5 5 no N 2 Yok ROB OI E 5 5 8 e Si x NOB cs p S 8 gt NA lt 9 ZONE K3 M10 2 3 4 10 K5 M8 L10 L10 MI H10 P5 J10 P2 4 F 118 MS 15 5 15 116 17 J13 K5 11 12 15 115 7 11 E F9 P7 8 67 D15 1
37. of ors 149 xd V H7HOGNS _ u N 5 5 N E g Nas 1ov 2 2 U saa a a 4 551 2 B arl 50049 915 4 5 155194 E 2 ane h 9ss149 915 5 z 193735 aH 5 25107 51 A 1170 E Neac e SEES 55197 3 S 6 2 esta UU ELE CoL amp Dates ud 2 55187 X 15014 e i 190 1 21 Sco ARM a JJ 285 A N 1222 193136 n alL 7081409 ae BWIL 139 UN du L JOHINOO INSHH O 8 ONIWIL j HOLIMS 0 5187272 OL 5 eL 3 im g amp 8 8 4 3uvdS NJ m 14 Y 11 85 2a SN 1605 95 lt gt Q2 1556 OOD i vessels 9555 8 Ed 7 2 N 184 oI 9555 2 84 nto l d4 AA 1484 N ao 2OO S 4 a m a amp ezato C24 o 5 5 a o219 a 4 LS CxO iic 8 e ec a a 9 4 TO MDS gt T17 1135
38. 23 6 FT1 3 5 sip 2 9 9 cr Ucz PS O1 c 5 2 022 PA TB2 UV P1 P2 P2 P 25 TC IP CM TBS IP CP HPS oy TEE CHT P1 P2 552 4 nn in HTT AA Tio SM Uez DR 118 ciLic2 DR Na T19 T20 185 T24 23 PA MDS 5 0 FH E 2 DTT gt lt 2 03 4 15 6 7 21 22 uns DR mr pP P13 2 71213 4 516 gt 55 Oe o 9 35 2037 FOR REORDERING SPECIFY ARTWORK 69NT35 9854 REV CTD P N 59 720 373 131 Figure 5 27 Electrical Wiring Schematic 69NT40 464 10 Sheet 2 of 2 5 55 lt fv rag
39. MDS lt EMP1 7 bag OND OV VARS S A E 49 GO Els 09 OO 03503 ovArz 1 d 85901 9 9 o 111 E r ni OL 21 HL AWS 01 015 1 0 7 57805 36 787805 35 D 5 gt 5 o a z T 5 5 a N 2 915 1 2551 2 8 91574 6 ES aru aiit 915 s 2518 5 5 9 5 0497915 lt Hesia 51 55 s A 4 103135 9 b 510 a 1 2 ow 4n a33ds zi S X 5 en 01 5 1 Weis all 21112121711 rZ z 5510 2 8 Ri 5 5 8 235 08 1 1510 A 22221 193135 eo e IWIL 140 al G e HOLIMS a JOUINOO 1 2 8 ONTWIL amp 75107272 01 aN wo e 581 3 AlddNS Wu3MOd 7 o 9 AHS I T 92 N CN 3uvds ND m wo 5 OOO 20 2 5 5 E 5 in to T 1 5 og 8 C8 Oj 22 m COME B n o 5 m 2 0 ARTWORK 59 20 3504 REV Figure 5 16 Electrical Wiring Diagram M 69 20 284 1 amp 284 2 Sheet 1 of 2 5 32
40. 281 Nua gt 281 em E gt 11 AQuH 9 911 e u8 411 9 u8 UVT zouH 215 6289 22894 12894 4 81 OOCOE 099 2 1899 29334 2224 1434 133 K zio 1434 p 29397 1404 Peu 4 IBHO 1LHO 3 tb LW3 LLW3 tb La 11491 099 11H 8111 9090890006 29484 e143 13 23 11 LN ION 21 7 Vv811 I EF22 GRD Ned 22821 12924 abo O c lt CF21 CF23 131 TBS cps rs ON GRD N 460 3 60 A1 e r1 1 1 7 1140 2 7 me m i WNOLL40 281 7 511 9 Vv11 9
41. 5 32 5 17 Electrical Wiring Schematic 69N T 40 464 4 5 34 5 18 Electrical Wiring Diagram 69NT 40 464 4 5 36 5 19 Electrical Wiring Schematic 69N T 40 464 5 5 38 5 20 Electrical Wiring Diagram M 69NT 40 464 5 5 40 5 21 Electrical Wiring Schematic 69NT 20 284 3 5 42 5 22 Electrical Wiring Diagram 69NT 20 284 3 5 44 5 23 Electrical Wiring Schematic M 69N T 40 464 7 amp 69N T 40 461 7 8 5 46 5 24 Electrical Wiring Diagram 69NT 40 464 7 amp 69 40 461 7 8 5 48 5 25 Electrical Wiring Schematic 69 40 464 9 15 5 50 5 26 Electrical Wiring Diagram M 69NT 40 464 9 15 5 52 5 27 Electrical Wiring Schematic 69N T 40 464 10 5 54 5 28 Electrical Wiring Diagram 69NT 40 464 10 5 56 5 29 Electrical Wiring Schematic 69N T 40 464 12 5 58 5 30 Electrical Wiring Diagram 69 40 464 12 5 60 LIST OF TABLES Table Page 1 1 Chart oce tatam atu ta qoo dad 1 1 1 2 Compressor M Number Significance Chart 1 2 1 3 Safety And Pr
42. 69NT 20 284 5 2 5 2 Electrical Wiring Diagram M 69NT 20 284 5 4 5 3 Electrical Wiring Schematic 69NT 40 464 5 6 5 4 Electrical Wiring Diagram M 69 40 464 5 8 5 5 Electrical Wiring Schematic 69N T 40 464 1 5 10 5 6 Electrical Wiring Diagram 69 40 464 1 5 12 5 7 Electrical Wiring Schematic 69N T 40 464 2 5 14 5 8 Electrical Wiring Diagram M 69 40 464 2 5 16 5 9 Electrical Wiring Schematic M odel 69NT 40 464 8 Units with S N 90105284 thru 90105383 5 18 5 10 Electrical Wiring Diagram M odel 69N T 40 464 8 Units with S N 90105284 thru 90105383 5 20 5 1 Electrical Wiring Schematic M 69NT 40 464 8 0 nits starting with S N 90105384 5 22 5 12 Electrical Wiring Diagram M 69NT 40 464 8 U nits starting with S N 90105384 5 24 5 13 Electrical Wiring Schematic 69N T 40 464 3 5 26 5 14 Electrical Wiring Diagram 69NT 40 464 3 5 28 5 15 Electrical Wiring Schematic 69N T 20 284 1 amp 284 2 5 30 5 16 Electrical Wiring Diagram 69NT 20 284 1 amp 284 2
43. CF21 TRH4 HR22 2 Sirk che EX EF23 7 CMT2 HR23 TRH3 22 CB21 ax em d G CO SEP WELL 1 A ao 8 Y Cho Q S Mm 1 0 VSN1 2 1 v dj c gt CPA 3 SPARE ie ai OLE VSA3 vsc3 vsa2 vsc2 MEN 7325 GRD CPB VY NN NA Gane 80 BP Sapa 8 Q 4 be TEE EET k W L 7 7 gt gt BK W TBS e 183 A 8 5 t Si 5 15 81 RI 52 T3 Hr pet i D 460 3 EO 230 3 PLATE 6SNT 35 2067 ARTWORK 6SNT3S 9914 REV Figure 5 24 Electrical Wiring Diagram M 69NT40 464 7 amp 69 40 461 7 8 Sheet 2 of 2 5 49 20 K3 M10 2 3 4 5 110 e H10 P5 J10 P2 4 F I18 L16 17 J13 KS F12 H15 115 6 7 12 E F9 P7 8 67 015 M11 K10 K4 M11 111 F G9 H J10 M13 13 015 H14 J M13 L M10 N16 17 18 614 116 17 L9 M9 58 J4 6 16 17 L8
44. MLN NV a nm o DLR 21 vsci 1 oe E gg lt F II 4326 4 x zd e J va IO me E g sa T1 EFC1 T5 4 w rere lt me D gesce id EF31 4 4 5 x pene YA 33 n LN 1 Wwe on EZ _ 5 2 _ OD gu pu ou m Lea Cae A 133 CLT I ES23 ToT2 lt lt EMT2 122 i amt FG RX CF13 J uv _ 9995 RES AN m OPTIONAL Tif 8 lt L pn XL een N N 901 2 m x 7 habs DO 5 Se M ESCI a gt T3 mus uv N 23 S c utr reme E531 K in OPTIONAL 21 1 CELO Mem ects ey 2 787 187 HPS am 3 NO 9 s neal sty eee eae Lunn gt c u ul 2 ay 86 01 55 e em m 2 m P Ww a a a N 5 9 gt N Br g vukla AA a EET l AP 2 on E a OH Y 6 E moo QJ Figure 5 14 Elec
45. ICON lt 42 AE ecco 1 H 9 IHHL 1 5 9 Figure 5 4 Electrical Wiring Diagram M 69NT 40 464 Sheet 2 of 2 8114 HdG gt 5 M CIO SH res LS ASST 133 RX GX WA ys marc Hewa Q Q ZIW a ae 5 lt a 8 7 8 Na oP lll vas abn ce m 5 5 14 ere gy ope A Cj 4 pe gt 4 lao M 7 01140 iZ N 481 e A09 eh ean ie a ao 55 6 INOI Lado man e 59 5 220 si o 79 2240 ej 58 r TBS ZONE H14 K3 M10 2 3 4 10 K5 M8 110 110
46. a lt gt lt gt zsas E Pss n Q 2 0 oll N 1555 5 m of n x 1 M 4 2555 25 aer vers CHE 8 x 5555 x un 555 JR BuU e pre 4 amp a 540 8 a fene i8 x a N Zed 0 m 59 5 Edd Ko 5 J 524 4 o olf aa 4 L tdo AE NE amp i I 5 9 35 9114 REV Sheet 2 of 2 5 37 Figure 5 18 Electrical Wiring Schematic 69NT40 464 4 2 1 1 coun p gt OUR
47. p DUET elk CHT IP CM 185 TB3 HPS x Yat ta 1131 80 919 RM 3 e no us ciLic2 AL TH HIT fri QER ciLic2 DR RM mL RM 54 ny IRS 5 T24 1723 MDS x 777 suv 1 2 DIT P13 2 4 7 21314 5 67 555 TDS 505 1123456 199 8 7 6 5 4 3 2 1 PLATE DD 88888 FOR REORDERING SPECIFY _ 69NT35 8654 REV P N 69 20 373 108 J Figure 5 9 Electrical Wiring Schematic M 69NT40 464 8 Units with S N 90105284 thru 90105383 Sheet 2 of 2 5 19 g amp Se M 5 RE 2 gt ce cr Se Eg a 3 EE RE L LI 1 m T 2 2 2 2 1 3 Ks lt gt 1 1 55 i GH ore 1 Ato 1 17 DTT GTT COIL pss
48. tenet n 4 4 4 7 Compressor Reassembly 4 6 4 8 Checking The Compressor Oil 4 7 4 9 Checking Or Replacing M oisture Liquid Indicator 4 8 4 10 Checking Or Replacing TheFilter Drier 4 8 4 11 Checking Or Replacing High Pressure Switch 4 9 4111 Replacing High Pressure Switch 4 9 4112 Checking High Pressure 4 9 4 12 Servicing Quench Solenoid Valve QV 4 9 4 13 Replacing The Evaporator Coil And Heater Assembly 4 10 4 14 Replacing The Evaporator Fan Motor 4 10 4 15 Servicing The Evaporator Coil Heaters 4 10 4 16 Checking Calibration Of The Defrost Air Switch 4 10 4 17 Condenser De robe eg d lets 4 11 4 18 Condenser Fan Motor Assembly 4 11 4 19 Recording Thermometer Partlow 4 11 4 20 Recording Thermometer Saginomiya 4 13 4 21 Recording Thermometer Fuji Kiki 4 14 4 22 Rust Prevention A nd M aintenance Of Painted 5 5 4 14 4 23
49. 16 17 1 L10 10 11 15 17 11 115 H J4 6 C E16 17 8 L8 SYMBOL C CB1 CB2 DV HT S9 HBL HBR HTL HTR IS PH 9 lt gt DESCRI COMPRESSOR CONTACTOR CIRCUIT B REAKER 460V CIRCUIT B CAPILLARY CONDENSER REAKER 230V DE SUPERHEATER VALVE R22 OPTION FAN CONTACTOR CYLINDER HEAD THERMOSTAT CR22 OPTION COOL LIGHT WHITE LIMITING TRANSFORMER CURRENT CONDENSER COMPRESSOR MOTOR FAN MOTOR TEMPERATURE SET STATION DIGITAL D DE DE DEFROST L DRAIN PAN EVA EVA FUSE FULL LOAD ISPLAY ROST HEATER BOTTOM LEFT ROST HEATER BOTTOM RIGHT DEFROST HEATER DEFROST HEATER TOP RIGHT DEFROST INTERVAL SELECTOR TOP LEFT IGHT CAMBER HEATER DEFROST RELAY DEFROST TERMINATION THERMOSTAT PORATOR FAN CONTACTOR PORATOR FAN MOTOR AMPS HEAT LIGHT CAMBER HIGH PRESSURE SWITCH EA INTERN 4 T ERM gt L PROTECTOR EATER CONTACTOR INATION THERMOSTAT IN RANGE LIGHT GREEN CONTROLLER RELAY CIN RANGE MANUAL DEFROST SWITCH REMOTE MONITORING RECEPTACLE RETURN TEMPERATURE SENSOR SET TEMP DISPLAY SWITCH SOLENOID MODULATING VALVE SCALE SELECTOR SWITCH SUCTION SOLENOID THERMOSTAT SUCTION SO
50. 2551 ld E OTTTTTTT uH 2 55187 gt 5 z tag t 1 E aus TORY 54 159142 p n 10 0 0 m m 235 1 Hsia 22 in N J JJ 123136 IS nN 7051409 3HnlVH3dHil 6 3411 13 UN JOHINOO INSHH O 8 ONIWIL HOLIMS AN ane wo D 3 AJdddns H3MOd im SIT ol A N 1 8 amp 4 S 3uvdS NJ m 11 X x A 505 amp B E EP 5 p I SIO Li L1 4 T a rou Ep a 1556 o eoe F peer Y amp a OR o 2 EE HM dm sia N 42 5 9555 lt 84 3 a 84 o 9 9 Ld A 85 5 5 4 a 8 lt a 2OO RO f NN o z 5 1 a Sed i v n a e cj 2 atO Be R gt o T e e a a 9 4 gt x a tere AY Gn 3A j MDS Qon ARTWORK BENT35 98824 REV ARTWORK 6SNT3S 9834 REV BSNT35 1987
51. 481 9 a3u tou edd pHa eS apa iN J pasa DC Resa Neue 981 e 8 lt A_y E 8 reo Srey Bb fa Porter Face ae S E HTO 9 amp o S m 5 ims Lx 115 xo S 8 2814 PHa Y nys m 911 98 2004 25 uim 411 48 4 o Il 2 4 c i eio DX uH gt ocala 22434 8 amp Colo ar f 5 yuna 1 P 191 2Y Reza 9 Let 7 LW3 IN Tina B a 61095 02 89 2334 USE Dy x o 5 8 1 r ross lt IN LN 959 i i nn E 2053 m 1 y te 170 1899 2 1 121 5 LAD psy Bees OD 1253 139 N N a n cos 5 j 5 I DO d 2434 2 WNOLLdO amp QR 09315 1 1058 12334 tdt B Kt esa 5 8 a 140 2 1 281 NNNN 5
52. 8 ree bue El LOS d eia Lag 5 5 ASS qs vIW 2 Cat LW al 4 5 Xe eels Va ito 2340 gt MEN zo DE N T21 172 122 21 sT TRx1 21 CF23 31 aps O lt GRD L 460 60 7 51 tho o E GRD 23 9 _ TBS lt PLATE 69NT35 2377 ARTWORK 9 35 1258 REV Figure 5 30 Electrical Wiring Schematic M odel 69NT40 464 12 Sheet 2 of 2 5 61
53. 1 3735 34 8869 0025 im miro _ 50 8254 00 3302 00 0254 00 0508 4 24 FACTORY MINIMUM 50 4444 17 4574 00 1270 00 0000 00 0254 MAXIMUM WEAR BEFORE REPAIR MM 0 0508 0 0508 0 0508 0 0508 0 0508 0 0254 0 0635 0 0635 0 0635 0 6350 0 6350 0 0508 0 0508 0 0254 0 6350 0 0508 0 0508 SIZE DIAMETER THREADS INCHES 1 16 1 8 1 4 1 4 1 4 5 16 3 8 7 16 5 8 5 8 10 1 1 2 Table 4 5 Compressor Torque Values TORQUE RANGE 27 pipe 1 11 1 66 20 pipe 0 83 1 38 20 pipe 20 25 2 77 3 46 10 12 1 38 1 66 12 15 1 66 2 07 i 12 16 1 66 2 21 0 83 138 12 16 1 66 2 21 16 20 2 21 2 77 18 20 30 2 77 4 15 40 50 5 53 6 92 55 60 7 61 8 30 25 30 3 46 4 15 0 55 0 83 60 75 8 30 10 37 3 4 6 eae NEF National Extra Fine TEMPERATURE USAGE Pipe Plug Crankshaft Oil Return Check Valve Crankcase Pipe Plug Gauge Connection Connecting Rod Capscrew Baffle Plate Crankcase Side Shield Oil Pump Drive Segment Unloader Valve Cover Plate Plate End Bearing Head Terminal Block Cap Screws Suction Valve Discharge Valve Pump End Bearing Head Bottom Plate Crankcase Compressor Foot Cylinder Head Motor End Cover Crankcase Crankshaft Oil Bypass Plug Crankcase Oil Pump Drive Segment Oil Level Sight Glass Tabl
54. ES Figure 4 26 Thermostatic E xpansion Valve To M easure Superheat 1 Openaccesspanel to exposethe expansion valve and 1 4 inch port See Figure 1 1 The 1 4 inch port is equipped with a Schrader fitting 2 Attach a temperature tester sensor near the expansion valve bulb and insulate M ake surethe suction line is clean and firm contact is made with tester 3 Connect accurate gauge to the 1 4 inch port 4 Run unit until unit has stabilized Set controller 5 5 C 10 F below container temperature NOTE Suction pressure must be 0 5 kg cm 6 psig below valve M O P maximum operating pressure Example if valve rated at 55 MOP suction pressure must be below this MOP Recommended pressure is below 3 44 kg cm 49 psig 5 From the temperature pressure chart Table 4 7 determine the saturation temperature corresponding to the evaporator outlet pressure 6 Note the temperature of the suction gas at the expansion valve bulb 7 Subtract the saturation temperature determined in Step 6 from the average temperature measured in Step 5 The difference is the superheat of the suction gas d Adjusting Superheat 1 Removethe refrigerant and then remove the two bolts holding the valve body together 2 Remove the cage assembly and rotate the adjusting nut to increase or decrease the superheat Turning the nut to compress the valve spring will increase the superheat and decrease refrigerant flow through the v
55. VES 3 che EDE lt O 1 842 3 e 1HSA loa A a Kian 5 828 m Eo GO ere cu Bel Cue 15 EI 82 8 cO reus CY 7 20434 amp 294 zs Meo S gx PI 124 5A 8 I8 He cenas 2104 FECSA CHE MIO Xe abo Ya 8 SE S Neoun ZIS 9 7 J f Don DE 2 9 21324 LeASA 235 x 8 M amp E YY 33 Y E Ero Gig dor 1 5 049 DX of RE 11394 vVS K gt gt A e i HM oo 1H3 103 5 Co i o Pee az WNOLLdO e a 121 1 E N 409 A IAR 1 e 15 JA YALE e gt AD SN Ww Fe 1SA 21 CRX m za e CN a LZNGA uoo ou eza ZIW 525 TE uad bes Tu AN lt 5 GAS 1249 4 m GEG je UE VY e cil le z
56. ua aX E 1259 EXT R 58 g pMn 2343 19 EJ DO lt mue T 22434 amp DE QR True CT uo 12434 ioci CAD 1253 5 Q EE eal XS amp Cc e 01140 2 281 e 481 e my e amp ha b pts EN QU Hsu _ v1 e AAS ee M 5 3 VW m m qx m 7 gt S 8 2 a f o SO E a d 4 e 2 we lt ag Vv lt m ARTWORK 59NT20 3484 REV Figure 5 2 Electrical Wiring Diagram M 69NT 20 284 Sheet 2 of 2 5 5 LEGEND ZONE SYMBOL DESCRIPTION K3 M10 C E COMPRESSOR CONTACTOR E2 3 CIRCUIT BREAKER 460V E4 CB2 EX CIRCUIT BREAKER 230V M10 CDV x CAPILLARY DE SUPERHEATER VALVE R22 OPTIOND K5 M8 CF gt CONDENSER CONTACTOR L10 CHT CYLINDER HEAD THERMOSTAT R22 OPTION L10 CL COOL LIGHT WHITE 1 CLT CURRENT LIMITING TRANSFORMER H10 P5 CM CONDENSER FAN MOTOR J10 P2 4 cP COMPRESSOR MOTOR css TEMPERATURE SET STATION F 118 DD DIGITAL DISPLAY 5 DHBL DEFROST HEATER BOTTOM LEFT LS DHBR DEFROST HEATER BOTTOM RIGHT MS DHTL DEFROST HEATER TOP LEFT LS DHTR DEFROST HEATER TOP RIGHT L16 17 DIS DEFR
57. 2 2 STARTING AND STOPPING INSTRUCTIONS CAUTION sure that the unit circuit breaker S and thestart stop switch arein theO FF position before connecting to any electrical power source p Starting the Unit 1 Refer to Pre Trip Inspection section 2 1 2 sure unit circuit breaker s and start stop switch are in position O OFF position 3 Check power source for proper voltage Connect unit power plug and turn main power ON 4 Turn refrigeration unit circuit breaker s and the start stop switch ON position 1 5 To adjust the temperature set points depress SDS switch and turn temperature selector knob while looking at the digital temperature display This procedure allows temperature settings within a tenth of a degree centigrade 6 Refer to section 2 3 after unit is running q Stopping the Unit Turn the start stop switch to position O OFF 2 3 AFTER STARTING INSPECTION a Check rotation of condenser and evaporator fans b Check compressor oil level c Check operation determine if unit responds properly to setting of controller cycling from heat to cool at controller setting d Feel filter drier Excessive temperature drop across drier indicates restriction 2 4 UNIT OPERATION 2 4 1 Cooling Controller Set Below 10 C 14 On decreasingreturn air temperature the unit will be in cooling with the condenser fan motor and evaporator fan motors energ
58. 4 29 HUMIDISTAT Setting 1 Theupper switching point of switch A is set by the set point knob E 2 Incase of deviations of the measured humidity from the set point a recalibration by means of the nut S is recommended 3 If the actual value is higher than the set point turn nut S clockwise a 4 Ifthe actual value is lower than the set point turn nut S counterclockwise Set Point 20 40 60 70 80 Y6turn 15 15 11 8 5 b Maintenance Soiled sensing elements can be cleaned by dipping the stem in soapy fresh water or fresh water with washing powder maximum 80 176 4 22 When drying the stem must remain tensioned i e the set point knob is set to approximately 0 R H Drying time approximately 24 hours If necessary recalibrate the humidistat Figure 4 27 Humidistat Table 4 1 Partlow Bulb Temperature Resistance Chart TEMPERATURE RESISTANCE F OHMS 10 12561 00 5 10579 70 0 8944 17 5 7588 89 15 5520 32 20 4731 71 25 4068 68 30 3509 36 32 3310 57 35 3035 99 40 2634 10 45 2291 85 50 1999 52 55 1749 11 60 1534 00 65 1348 72 75 1050 14 80 929 87 85 825 21 90 733 93 95 654 12 100 584 19 105 522 79 Table 4 2 Selector Settings and Resistance Table 4 3 Recommended Bolt Torque Values SELECTOR SELECTOR RESISTANCE BOLT DIA THREADS TORQUE SETTINGS CONNECTIONS
59. r551 5 S R 1179 b eaa E woo 20 199736 ESI V a le e i z m dn cars s cis e 1 1 eis abl tae z ssia AR P 22 BARRA 285 Fist Ts 22224 WI 193138 3411 140 02 TIN e alL 9NIMIL TX one P 8 in 510 2 2 OL 8 all SUI 3 Alda im ORO 30 ENZA mon o to 8 8 11 Nzsas 25 28 RN Lisasta gt cr cr n as 2 L1 L1 2 pP a x 1 4 i5 wo lt gt lt gt 1555 Nzsss 8 a m S i gt eoo m BHO 7555 m 7 L 9555 9 Lo G b i 5 7 B MY xac f 244 x a E4d o aA s4d D 5 g 5 dA n 1 2 44d e BPO 52 1 N OF a a e e amp BO n n t gD ARTWORK _59NT35 8624 ARTWORK 69NT35 8634 REV oe 9 40 1043
60. Control Transformer Location Current Limiting Transformer Digital Temperature Display Scale Selector Switch Relay 24 vac w 12 coil Main Control Board Figure 1 5 C ontrol Box and Controller Units with One Speed E vaporator M otors 1 7 13 REFRIGERATION SYSTEM DATA a Compressor Motor Assembly No of Cylinders 6 M odel O6DR Weight Dry 132 kg 290 Ib b Approved Compressor Oil Petroleum Specialties Inc Cryol 150 Witco Suniso 365 Texaco Capella WF 32 c Compressor Oil Charge 4 0 liters 8 5 U S Pints d Compressor Oil Sight Glass Oil level should be between 1 4 to 1 2 of the sight glass with the compressor in operation e Defrost Air Pressure Swich Initiates at 20 31 1 8 WG 0 80 07 inch f Defrost Timer Initiates D efrost Refer to paragraph 1 16 m g Defrost Termination Thermostat Opens 239 3 75 1 5 Closes 15 6 3 C 60 5 Expansion Valve Superheat Setting at 0_C 32 container box temperature 4 4 to 5 5 8 to 10 F i Heater Termination Thermostat Opens 54 3 130 5 F Closes 38 3 100 1 5 F High Pressure Switch 28 or 37 CFM Compressor Cutout 21 1 0 7 kg cm 295 Cut In 13 1 0 7 kg cm 190 41 CFM Compressor Cutout 25 0 7 kg cm 350 1 Cut In 18 0 7 kg cm 250 k Refrigeration Charge Refer to Table 1 1 l Refrigerant Pressure Relief Valves Low Side Val
61. i Model 69NT40 Current Control Capacity Override The current control function of the controller limits the maximum unit current draw to prevent possible overloading of limited power sources such as an engine generator set when operating with high container temperatures and high ambient temperatures Refer to Table 1 4 The current control function when required will override the normal modulated capacity control function described in paragraph 1 16 to reduce cooling capacity sufficiently to prevent total unit current from exceeding a preset value This is accomplished by circuitry on the timing and current control circuit board in response to the current sensed in one phase of the compressor power line by current limiting transformer CLT The current limit on the timing and current control board is factory set in switch position B see Figure 1 8 mmm Q7 0 A D b SW1 E 000 1 E CURRENT LIMIT SWITCH Figure 1 8 Current Control Printed Circuit Board Table 1 4 Current Limiting Switch Positions and Amperages Switch Position 460 vac Operation 230 vac Operation A B C D E 15A 17A 19A 21A 23A 30A 34A 38A 42A 46A NOTES 1 Ifthe current limiting switch is s
62. l T8 SI 5 052 DTT I 14 4 4 1 5 G f s0 160 416 17 ar 6 a oO OO 8 m 5 99 CHO GND OV 61144 g m z 39 09 9996 Ho 9509 Sloe WY aasnd 1 E o goon 6 99005006 11 111 T NA c h E v ja fi 01 HL 01 915 149 ud 8065836 gt lt gt a a gt 8 N35 10v 5 a N gaa 2 z e v s a E essi 2 a 500 3 91645 915 a hosa S 9551 1 9 00 S 915 aH 5 esia S N 9551 85 eaae 0 3a 193156 dW31 c 2 E E zaa zi Hesr 5 essi 5 aH t z e e 92 1 100 1 amp
63. xu 35 ez m E NuB Drs w hs els 3 P lI 3 RH zio SENS C EIN amp pP M 12 4 hele 1 91 4 x my 09 A PAAA opisao 2 LR aM 119 tn Qa 3 Uu N N Q a is 0 p An S P 73 193 e ord n 29 9 1 51 179i Y 7 0179 1 1930 er 1 S 1 gt 291 911 AWS M ASS 981 lt 5 a pe aC l l 8 rah Sh m alee 2 lt 2 5 8 Vv Vv m o am 6 7 Figure 5 28 Electrical Wiring Schematic 69NT40 464 10 Sheet 2 of 2 5 57 J13 K4 F13 H16 15 12 H7 D16 An 3 M12 0 610 111 4 FT5 L12 L10 Zw oN ON DON 00 um 2 116 1 F12 J15 T SYMBOL C 0 9 lt gt DESCRIPTIO COMPRESSOR CONTACTOR CIRCUI CAPIL T BREAKER 460V ARY DE SUPERHEATER VALV E CR22 OPTION DE
64. 230 3 0 13 23 amp E x X 190 3 50 TS E m m zs LA 111121 23 111 121 12 13 23 cF 50 4 UV 2 SST TB6 7557 e e Po bY 2 P P2 8 CHT 2 IP cM TBS IP CP TB3 HPS 1 Plc P2 59 4 RM Bs CU YY 8 TH HTT T8 Fre 11 702 M oq 95 ciUc2 118 1043 DR Yat T19 720 RM RM DE 18 IRG cS DD NY IRI 1241 123 MDS o HH M 2 DTT 2 13 14 15 16 17 2122 Irs DR 176 1 1r P13 2 1 2 3 4 5 8 7 69 o TDS 5 505 n 28 e 5 4 3 2 1 aD PLATE DD 88888 69NT35 1977 FOR REORDERING SPECIFY ARTWORK PR aie m CTD P N 69NT20 373 130 J Figure 5 25 Electrical Wiring Schematic 69NT40 464 9 15 Sheet 2 of 2 5 51 10 11 12 13 14 15 16 17 18
65. 4 2 4 4 3 6 4 13 4 14 4 28 4 14 4 28 Check Reset Open valves completely 4 17 or 4 23 4 5 INDICATION TROUBLE POSSIBLE CAUSES 3 4 UNIT WILL NOT HEAT OR HAS INSUFFICIENT HEATING No power to unit Start Stop switch OFF or defective Circuit breaker OFF or defective External power source OFF Circuit breaker or fuse defective Transformer defective Condenser fan internal motor protector open Evaporator fan internal motor protector open H eat relay defective No control power H eater termination switch open U nit will not heat or has insufficient heat H eater s defective H eater contactor or coil defective Evaporator fan motor s defective or rotating backwards Evaporator fan motor contactor defective Temperature controller malfunction Defective wiring Loose terminal connections Low line voltage 3 5 UNIT WILL NOT TERMINATE HEATING U nit fails to stop heating Temperature controller improperly set Temperature controller malfunction H eater termination switch remains closed along with the heat relay 3 6 UNIT WILL NOT DEFROST PROPERLY Will not initiate defrost automatically Defrost timer malfunction Loose terminal connections Defective wiring Defrost termination or heat termination switch open H eater contactor or coil defective Will not initiate defrost manually M anual defrost switch defective Defrost termination switch open Initiates but defrost relay DR drops out Low line
66. COMPRESSOR CONTACTOR CIRCUIT BREAKER 460V CIRCUIT BREAKER 230V CAPILLARY DESUPERHEATER VALVE R22 OPTION CONDENSER FAN CONTACTOR CYLINDER HEAD THERMOSTAT R22 OPTION COOL LIGHT GREEN CONTROL LIMIT SWITCH CURRENT LIMITING TRANSFORMER CONDENSER FAN MOTOR COMPRESSOR MOTOR CONTROL RELAY 24VAC TEMPERATURE SET STATION DIGITAL DISPLAY DEFROST HEATER BOTTOM LEFT FROST HEATER BOTTOM RIGHT DEFROST HEATER MIDDLE LEFT FROST HEATER MIDDLE RIGHT DEFROST HEATER CTOP LEFT DEFROST HEATER RIGHT DEFROST INTERVAL SELECTOR DEFROST LIGHT CRED DRAIN PAN HEATER FROST RELAY DEFROST TERMINATION THERMOSTAT m T m T EVAPORATOR FAN MOTOR FUSE FULL LOAD AMPS HEAT LIGHT WHITE HIGH PRESSURE SWITCH HEATER CONTACTOR HEAT TERMINATION THERMOSTAT INTERNAL PROTECTER CCONDR FAN INTERNAL PROTECTOR MOTOR INTERNAL PROTECTOR CEVAP FAN MOTOR INTERNAL PROTECTOR TRANSFORMER IN RANGE LIGHT CAMBER CONTROL RELAY CIN RANGE CONTROL RELAY 24 MANUAL DEFROST SWITCH TEMPERATURE RECORDER REMOTE MONITORING RECEPTACLE RETURN TEMPERATURE SENSOR SET TEMP DISPLAY SWITCH SOLENOID MODULATING VALVE SAFETY OVERRIDE THERMOSTAT SUPPLY PROBE SWITCH SCALE SELECTOR SWITCH SUCTION SOLENOID THERMOSTAT SUCTION SOLENOID VALVE START STOP SWITCH SUPPLY TEMPERATURE SENSOR TEMPERATURE CONTROLLER TERMINAL BLOCK CONNECTION
67. CTD P N 20 373 11 7 Figure 5 19 Electrical Wiring Schematic M 69NT40 464 5 Sheet 2 of 2 5 39 Sheet 1 of 2 5 40 DD Figure 5 20 Electrical Wiring Schematic M 69NT40 464 5 62 Yo 1 N o a le gt gt gt o c OF J qo um To m nin Poe ten AN uu O0 210 Oe QNO Ov L wos m e e Fe la IQ oe OG fe alla 6 o JA 03524 ovare _ CHE 9 9 9 8 lti ane 8 zlee
68. T19 RM RM 13 ee APS O 777 MDS 14 mo Ny 1 2 prt 2 aa 15 G 17 2122 15 uns DR sf tw 3 AMP P P13 23 4557 1 2 4 5 6 16 17 4 m E Om 79 h 6 5 4 2 1 DD 88888 19 ARTWORK PLATE FOR REORDERING SPECIFY GSNT35 9104 REV 5 1377 CTD P N 69 20 373 116 J Figure 5 17 Electrical Wiring Schematic 69NT40 464 4 Sheet 2 of 2 5 35 A gt EMP1 5 4 Sheet 1 of 2 5 36 DD Figure 5 18 Electrical Wiring Schematic M odel 69NT40 464 4
69. CONTROLLER RELAY COOLING TIME DELAY CEVAP FAND TIME DELAY OVERRIDE SWITCH TIME DELAY DEFROST TERMINATION CONTROLLER RELAY CHEATING CONTROLLER RELAY USED CONTROL TRANSFORMER TEMPERATURE SIMULATOR SWITCH CONTROL RELAY CUTILITY COMPRESSOR UNLOADER SOLENOID R22 OPTION VOLTAGE SWITCH WATER PRESSURE SWITCH 5 26 EVAPORATOR FAN CONTACTOR LOW SPEED EVAPORATOR FAN CONTACTOR CHIGH SPEED
70. High Speed 2 0 2 3 Amps Low Speed 0 4 0 6 A mps Single Speed M otor 2 01 4 0 Nominal H orsepower High Speed 0 58 1 0 hp Low Speed 0 07 0 12 hp Single Speed M otor 0 58 1 0 hp Rotation Evaporator Fan otor 1 See Figure 1 2 CW when viewed from shaft end CCW when viewed from end opposite shaft end Evaporator Fan Motor 2 See Figure1 2 CCW when viewed from shaft end CW when viewed from end opposite shaft end Speed 2850 3450 rom Voltage 380 460 vac 1 ph 50 60 hz g Fuses Control Circuit Amps 6 amp Unit Control Board Amps 3 amp 15 SAFETY OVERRIDE THERMOSTAT OPTIONAL Thisthermostat is fixed at 3 9 C 25 F to provide a low temperature limit on the evaporator supply air discharge air when transporting perishable commodities When the temperature controller isset below 10 C 14 F the safety override thermostat is bypassed as relay TU is de energized and contacts T36 to T35 are closed refer to section 5 For thermostat location see Figure 1 2 16 VOLTAGE SWITCH AND POWER TRANSFORMER OPTIONAL WARNING Do not attempt to remove power plug s before turning OFF start stop switch ST unit circuit breaker S and external power source M ake sure the power plugs are clean and dry before connecting to any power receptacle a Step Up Power Transformer The transformer is located under the condenser coil left hand side of unit and the purpose of this transformer isto provide
71. IN RANGE LIGHT GREEN CONTROLLER RELAY CIN RANGE2 MANUAL DEFROST SWITCH REMOTE MONITORING RECEPTACLE RETURN TEMPERATURE SENSOR SET TEMP DISPLAY SWITCH SOLENOID MODULATING VALVE SCALE SELECTOR SWITCH SUCTION SOLENOID THERMOSTAT SUCTION SOLENOID VALVE START STOP SWITCH SUPPLY TEMPERATURE SENSOR CONTROLLER TERMINAL TERMINAL BLOCK CONNECTION CONTROLLER RELAY COOLING TIME DELAY TIME DELAY OVERRIDE SWITCH CONTROLLER RELAY CHEATING TRANSF ORMER CONTROLLER RELAY CUTILITY NOT USED2 TEMPERATURE SIMULATOR SWITCH COMPRESSOR UNLOADER SOLENOID R22 OPTION VOLTAGE SWITCH WATER PRESSURE SWITCH OPTIONAL Figure 5 19 Electrical Wiring Schematic M 69NT40 464 5 Sheet 1 of 2 5 38
72. Install venturi Apply Loctite to fan set screws Adjust fan within venturi so that the outer edge of the fan projects 7 9 mm 5 16 inches out from edge of venturi Spin fan by hand to check clearance e Close and secure condenser fan screen guard f Apply power to unit and check fan rotation If fan motor rotates backwards reverse wires 5 and 8 4 19 RECORDING THERMOMETER PARTLOW CAUTION The inside mechanism of the control particularly the inside of the element housing should never be oiled however control mechanisms should be sprayed periodically every 60 days with corrosion inhibiting CRC 3 36a or 6 66 or LPS no 2 Instruments for Checking Bulb Temperature The recording thermometer may be equipped with one or two Simpson accessories 344 units each consisting of a thermistor probe and receptacle mounted to instrument case Single probe is attached to the element bulb capillary which senses the container return air temperature If using two probes the other probe is attached to the supply air temperature sensor event of a failure with the 344 test lead other instruments for checking bulb temperatures are 1 Simpson Meter CTC P N 07 00013 or Robinair Thermistor Temperature Tester 12860 A resistance thermometer and RCA lead with a phono plug at each end may be used to compare bulb temperature and stylus indicated temperature on chart by inserting one end of the lea
73. NINOS o I s11 ei bbb 8 Eus 249 81 l um VW m m oF m Cs a df 4 A D a SLE m a z JOO N spia gt 6 55 4 2 8 R gt B 2 T 8 1 ich ic Eu Vv v 55 lt a o ARTWORK 9 35 9124 REV N 16 17 KS F11 12 H15 115 MB 7 M11 E F9 P7 8 67 015 F 69 H J10 M13 F13 615 H14 J M13 L M10 N16 17 J18 614 116 17 L9 M16 17 SYMBOL CB2 DV HT HBL HBR HTL HTR IS mmooo GEND DESCRIPTION COMPRESSOR CONTACTOR CIRCUIT BREAKER 460V CIRCUIT BREAKER 230V CAPILLARY DE SUPERHEATER VALVE R22 OPTION CONDENSER FAN CONTACTOR CYLINDER HEAD THERMOSTAT R22 OPTION COOL LIGHT WHITE CURRENT LIMITING TRANSFORMER CONDENSER FAN MOTOR COMPRESSOR MOTOR TEMPERATURE SET STATION DIGITAL DISPLAY DEFROST HEATER BOTTOM LEFT DEFROST HEATER BOTTOM RIGHT DEFROST HEATER TOP LEFT DEFROST HEATER TOP RIGHT DEFROST INTERVAL SELECTOR DEFROST LIGHT CAMBER DRAIN PAN HEATER DEFROST RELAY DEFROST TERMINATION THERMOSTAT EVAPORATOR FAN CONTACTOR EVAPORATOR FAN MOTOR FUSE FULL LOAD AMPS HEAT LIGHT CAMBER HIGH PRESSURE SWITCH HEATER CONTACTOR HEAT TERMINATION THERMOSTAT INTERNAL PROTECTOR
74. SYMBOL UJ CB2 DV HT 0 gt DESCRIPTION COMPRESSOR CONTACTOR CIRCUIT BREAKER 460V CIRCUIT BREAKER 230V CAPILLARY DE SUPERHEATER VALVE R22 OPTION CONDENSER FAN CONTACTOR CYLINDER HEAD THERMOSTAT R22 OPTION COOL LIGHT WHITE CURRENT LIMITING TRANSFORMER CONDENSER FAN MOTOR COMPRESSOR MOTOR TEMPERATURE SET STATION DIGITAL DISPLAY DEFROST HEATER BOTTOM LEFT DEFROST HEATER BOTTOM RIGHT DEFROST HEATER TOP LEFT DEFROST HEATER TOP RIGHT DEFROST INTERVAL SELECTOR DEFROST LIGHT CAMBER DRAIN PAN HEATER DEFROST RELAY DEFROST TERMINATION THERMOSTAT EVAPORATOR FAN CONTACTOR EVAPORATOR FAN MOTOR FUSE FULL LOAD AMPS HEAT LIGHT CAMBER HIGH PRESSURE SWITCH HEATER CONTACTOR HEAT TERMINATION THERMOSTAT INTERNAL PROTECTOR IN RANGE LIGHT GREEN CONTROLLER RELAY CIN RANGE MANUAL DEFROST SWITCH REMOTE MONITORING RECEPTACLE RETURN TEMPERATURE SENSOR SET TEMP DISPLAY SWITCH SOLENOID MODULATING VALVE SCALE SELECTOR SWITCH SUCTION SOLENOID THERMOSTAT SUCTION SOLENOID VALVE START STOP SWITCH SUPPLY TEMPERATURE SENSOR CONTROLLER TERMINAL TERMINAL BLOCK CONNECTION CONTROLLER RELAY COOLING TIME DELAY TIME DELAY OVERRIDE SWITCH CONTROLLER RELAY CHEATING TRANSFORMER CONTROLLER RELAY CUTILITY NOT USED TEMPERATURE SIMULATOR SWITCH
75. The humidistat Figure 1 2 is factory set at 70 relative humidity R H and is designed to operate when transporting a chill load controller set above 10 C 14 F and is locked out when the controller is set below 10 C TU contacts T35 to T37 are open a Thehumidistat will be in operation if 1 Supply air is in range in range light illuminated 2 Humidistat control switch in the ON position 3 Controller is set above 10 C 14 F 4 Container relative humidity reaches the 7096 R H setting of humidistat The above energizes the humidistat circuit as relay IRS contacts 24 to T 23 TU relay contacts T 35 to T 37 H CS contacts 1 2 and H C contacts 1 3 close to energize the heaters and heat light b For testing purposes WARNING Beware of rotating evaporator fan when conducting following test 1 Remove the front evaporator fan motor 1 access panel see Figure 1 1 The humidistat is located behind this panel 2 Move the controller set pointer within 2 C 3 6 F of container supply air temperature 3 Move the humidistat control switch to ON position position 1 4 Turn the humidistat control knob until heaters are energized heat light ON and then reset control to 70 R H Replace access panel and lockwire 18 FRESH AIR MAKEUP VENT The purpose of the vent is to provide ventilation for commodities that require fresh air circulation and must be closed when transporting frozen foods 69 40
76. contactor HR energizes the defrost and drain pan heaters For set points below 10 14 F return air temperature is sensed and the range of capacity reduction is more limited than for higher set points When cooling requirements are less than the minimum continuous operating capacity of the unit the unit reverts to on off compressor cycling to match the load When cooling compressor and condenser fan contactors are energized through the normally open contacts of relay Also for set points below 10 C 14 F the controller will maintain return air at the set temperature by refrigeration Electric resistance heating is electronically locked out in thistemperature range U nits with two speed evaporator fan motors will have the evaporator fan motors in low speed as relay TU will be de energized Contactor ES energized lectric resistance heating islocked out for set points below 10 C 14 F bycontroller relay TH beinglocked out to prevent energizing the circuit Cargo temperatures will necessarily vary somewhat from controlled air temperatures A simple numerical difference between product temperature and controlled air temperature cannot be stated because of the complex 1 14 relationship of air flow variations within the container and temperature gradients of air and product H owever during cooling it can be stated that with supply air control a minimum product temperature will be effectively mai
77. increasing as temperature setting is moved upscale W hen the temperature selector ismoved below 0_C 32_F the voltage will remain stable momentarily and then slowly decrease Also when the temperature setting is lowered the voltage will decrease Note temperature reading on Simpson meter 4 When suction modulation valve current reaches 0 6 on volt ohmmeter the quench valve light emitting diode LED will energize and the temperature Simpson meter reading of the tube leaving the quench valve will decrease showing that the quench valve opened when the signal was sent from the control board through relay TQ 5 When the reading on the volt ohmmeter falls below 0 5 vdc the quench valve will de energize and the quench valve will close d Relay IRS Operation Continue to raise the temperature selector setting until the selector reaches 21 0 5 29 where the in range relay and light emitting diode LED will energize e Cooling Full Modulation 1 Continue to raise temperature selector setting to 05 05 33 1 The suction modulation valve current will be 0 9 to 1 2 2 Notethatthe compressor suction pressure gauge reading drops between 0 psig and 50 8 cm 20 inches H g vacuum 3 Thequench valveL ED will beilluminated and a substantial temperature drop will be seen on the Simpson meter when compared to that noted at the start of checkout procedure f CheckingHeating ON
78. lI 15 N o a le gt gt OEE 2 on E Z o Or N J as er 58 p e IE N S m m 0 IOF m Ov 4 lo E x 9 i 9 v gt o m 12 YY Y 03513 we nN e o DI 7 o eise j 9 6 AL 51 91 of ors 149 V S HOSNSS 305435 _ w D 5 5 8 Nas 1ov 9 9 4 z z U 2 915 4 551 2 9 915 15 5107 z lt 172 h 9ss149 lt 915 5 5 25107 192795 dWaL S la 1479 ssaitelk joo rex ES 1 e e v s s e aH MV 2551 eel OTTTTTTT uH 2 55187 X Lazu we ONNR TORY 5 9 159142 ju Jy mm 235 og Hsia in N JJ J LJ 123136 N 1081402 3univH3dW3l AWIL 139 N nd JOHINOO 3 ONIWIL HOLIMS wo i SHI 3 H3MOd im SIT 923 01 8 8 ay bs 3uvdS 4 o o m E N N t a SOS 2 we H N Q O Co 51 7 45 m oll L
79. 1ov 9 9 U gaa 2 915 m awa 900 8 915 170 9551 lt 5 25107 54 pssi 193145 5 4 LED ssaitelk Neaate woo afe jesta d 3 o z e 1 2 9 2 aH 519 2551 TTT oTTTTTTT Issia4z 4 ica tele L raat t 1 tT oR w BEBE 544 222 985 N 1222 Li 123136 9 IS N 1081502 3HnlvH3dW3l 6 3411 13 Y du I m kr JOHINOO INSHH O 8 ONIWIL a HOLIMS CN wo In SHI 3 H3MOd im SI OE 8 a 5 3uvdS NY m E te O a EN L 1608 ar OO i 2 5 SD 88 9 F O eee mx 8 8 98 lt 7 o Nesss o N mA 3 L 9555 9 2 T a 84 lt y ao gt pd f CA amp 08 2 GN g m 0 gt 92d e a 4 dere 8 ne eU m 9 4 e of tO D Qn 3A j MDS Qon ARTWORK BENT35 8904 REV B
80. 380 vac 3 ph 50 hz power when the 190 230 vac power cable black is connected to a 190 vac power supply or to provide 460 vac 3 ph 60 hz when the 190 230 vac power cable black is connected to a 230 vac power supply WARNING Do not attempt to remove power plug before turning OFF voltage switch VS start stop switch ST unit circuit breakers CB 1 And CB 2 and external power source b To Place Unit on 190 230 vac Power Supply 1 Make sure voltage switch VS is in the OFF position M ake sure start stop switch ST on control panel and circuit breakers CB 2 is in position O OFF See Figure 1 4 or Figure 1 5 2 Connect 190 230 vac power cable plug black cable Place voltage switch V S in the 230 v position Place circuit breaker 2 in position 1 Close and secure control box door and then place the start stop switch ST in position 1 c To Place Unit on 380 460 vac Power Supply 1 Make sure voltage switch VS is in the OFF position M ake sure start stop switch ST on control panel and circuit breaker CB 1 is in position O OFF 2 Connect 380 460 vac power cable plug yellow cable Place voltage switch V S in the 460 v position Place circuit breaker CB 1 in position 1 Close and secure control box door and then place the start stop switch ST in position 1 17 HUMIDISTAT OPTIONAL NOTE The supply air must be in range or humidistat circuit will not energize 1 9
81. 4 5 M atch mark each connecting rod cap and connecting rod for correct assembly Push the piston rods up as far as they will go without having the piston rings extend above the cylinders e f necessary remove the oil return check valve Inspect it for check valve operation flow in one direction only Replace assembly if its check valve operation is impaired See Figure 4 5 1 Oil Pressure Relief Valve 2 OilReturn Check Valve 3 Oil Suction Tube 4 Capscrew 5 Connecting Rod and Cap Assembly Figure 4 5 Bottom Plate Removed CAUTION Thecopper tube which connects tothe oil suction strainer extends out the bottom with the bottom removed Take precautions to avoid ending or breaking it while changingcrankcase positions f There are two types of oil pumps vane and gear See Figure 4 3 to identify which oil pump is used then follow the correct procedure below Vane Oil Pump 1 Remove the oil pump cover capscrews See Figure 4 2 This will free the oil feed guide retaining spring cover gasket and the oil feed guide See Figure 4 6 Hold piston to prevent shaft from turning if necessary 2 Remove the oil pump drive segment screws and lockwashers before the bearing head is removed See Figure 4 6 U nscrew the bearing head capscrews remove the bearing head and then remove the bearing head gasket 3 With the pump end bearing head removed from the compressor remove the
82. 5 6 2 LL 10 4 50 CABLE POWER PLUG 460V t lt BC uia 460 3 60 52 sg uz 300 3 50 BES 1 cc 13 123 HR 6 GLE niai 2307 T es 121 122 mar Ag 230 3 60 217 mi Jil 12 131 123 19093 50 Se a vs ca gt 85 5 nues 8 4 50 7 e CABLE Ar tn xi x2 24VAC nz F 121 22 131 23 WP 99 TE w 2 SST 186 Assy
83. Be DR 11 n8 SS TC HTT AS HR T Hi LZ tio ae ciUc2 Sar oly 19 AA RM IRS 6L D 13 JK IRL T24 123 MDS o 77 P smv 2 m 2 15 6 21122 T J LIRS J ITH TTC J Ua TU 7 9 P10 1 11 P13 2 1285678 12 3 12 5 6 3 T2 3 4 2 3 4 1 121314151617 RTS 5 o STS Fig 17 99 ne 18 PLATE DD 88888 35 1057 FOR REORDERING SPECIFY hs cantas aara REV E CTD P N 20 373 111 Figure 5 11 Electrical Wiring Schematic M odel 69NT40 464 8 Units starting with S N 90105384 Sheet 2 of 2 5 23
84. COMPRESSOR UNLOADER SOLENOID R22 OPTION VOLTAGE SWITCH WATER PRESSURE SWITCH OPTIONAL Figure 5 25 Electrical Wiring Schematic M 69NT40 464 9 15 Sheet 1 of 2 5 50 B D F G H I J K R 9 CLT 10 4 50 CABLE NS POWER PLUG 450V c RI lt 21 3 1 52 lt 580 2250 12 22 121 22 380 3 50 ME caca Ta 23 1 HR lt 6 Fl 111 121 121 22 mis AG
85. Compressor hums but does not start External power source OFF Start Stop switch OFF or defective Circuit breaker tripped or OFF Circuit breaker OFF or defective Control transformer defective Fuse blown 3A or 6A Start Stop switch OFF or defective E vaporator fan motor internal protector open Condenser fan motor internal protector open Compressor internal protector open High pressure switch open Low line voltage Single phasing Shorted or grounded motor windings Compressor seized 3 2 UNIT RUNS BUT HAS INSUFFICIENT COOLING Compressor Refrigeration System Compressor valves defective A bnormal pressures Temperature controller malfunction Evaporator fan or motor defective M odulating solenoid valve malfunction Suction solenoid valve malfunction 33 UNIT OPERATES LONG OR CONTINUOUSLY IN COOLING Container Refrigeration System H ot load D efective box insulation or air leak Shortage of refrigerant E vaporator coil covered with ice Evaporator coil plugged with debris E vaporator fan s rotating backwards D efective evaporator fan motor capacitor Air bypass around evaporator coil Controller set too low Compressor service valves or liquid line shutoff valve partially closed Dirty condenser Compressor worn 31 REFERENCE SECTION Turn on Check Check Check Replace Check Check 4 14 4 18 4 5 4 11 Check Check 4 5 4 5 B Ui w w N 4 14 4 25 1 14 Normal Repair
86. Drain and flush the water circuit of the condenser coil If scale on the tube inner surfaces is accompanied by slime a thorough cleaning is necessary before de scaling process can be accomplished b To remove slime or mud use Oakite composition N o 22 mixed 170 grams 6 ounces per liter one U S gallon of water Warm this solution and circulate through the tubes until all slime and mud has been removed After cleaning flush tubes thoroughly with clean fresh water WARNING Oakite No 32 is an acid therefore be sure that the acid is slowly added to the water DO NOT PUT WATER INTO THE ACID this will cause spattering and excessive heat Wear rubber gloves and wash the solution from the skin immediately if accidental contact occurs Do not allow the solution to splash onto concrete d Preparea 1596 by volume solution for de scaling by diluting akite compound No 32 with water This is accomplished by slowly adding 0 47 liter one U S pint of the acid akite No 32 to 2 8 liters 3 U 5 quarts of water Centrifugal pump Gas 30 GPM at 35 head Close vent pipe falsi vent valve when pump Priming lob ing connection Globe Pump valves P regulating valve IVA Return Fine mesh screen A Forced Circulation Fill condenser with cleaning solution Do not add solution more rapidly than vent can ex haust gases caused by chemical action 1 Pipe 5 Approxima
87. FRESH AIR MAKEUP ZERO EXTERNAL STATIC 50HZ 240 ps Ils 180 AIR 150 FLOW CMH 120 90 60 30 0 0 10 20 30 40 50 60 70 80 90 100 PERCENT OPEN For 60HZ operation multiply curves by 1 2 Table 1 3 Safety and Protective D evices SAFETY DEVICES UNSAFE CONDITIONS DEVICE SETTING l Excessive current draw Circuit Breaker CB 1 1 Trips at 24 2 amps Manual Reset 460 vac Circuit Breaker CB 2 1 Trips at 50 amps Manual Reset 230 vac 2 Excessive current draw on control circuit Fuse 2 Opens at 6 amps 3 Excessive condenser fan motor Internal Protection IP CM 3 N A winding temperature Automatic Reset 4 Excessive compressor motor winding Internal Protector IP CP 4 N A temperature Automatic Reset 5 Excessive evaporator fan motor s Intemal Protector s IP EM 5 N A winding temperature Automatic Reset 6 Abnormally low refrigerant temperature Low Side Pressure 6 Opens at 18 63 kg cm Relief Valve 265 psig 7 Abnormally high refrigerant temperature High Side Pressure 7 Opens at 34 10 kg cm Relief Valve 485 psig 8 Abnormally high discharge pressure High Pressure Switch 28 8 Opensat21 0 7 kg cm 37 CFM 295 10 psig High Pressure Switch 41 CFM 8 Opens at25 0 7 kg cm 350 10 psig 9 Solid state circuitry high voltage surge Fuse F1 9 Opens at 3 amps 10 Excessive power transformer winding Over Temperature Sensor 10 Opens at17
88. Front mmn Refrigeration Unit Rear Panels Removed Water Cooled Condenser Receiver Section Control Box And Controller U nits With Two Speed Evaporator Motors Control Box And Controller U nits With One Speed E vaporator M otors Refrigeration Circuit cu ascen ee Hew ri emere e IR Frost Pattern On 5 075 Current Control Printed Circuit Board Controller Set Point Below 10 C 14 F Return Air Control Controller Set Point Above 10 C 14 Supply Air Control Cooling Within 2 C 3 6 Of Set Heating Within 2 C 3 6 Of Set eaten Pa Ina a ahd n etr AG AR Vacuum Pump Connections Compressor Model 06DR ees pe EE Exploded View Of Valve Plate Assembly Bottorm Plate Removed cuisses deu vehe RE e D ed a ie Vane Oil Pump And Bearing Head Gear Oil Pump And Bearing Head Motor End COVer puede bere he etie Crankshaft Assembly 222222 22 2 Removing Equalizing Tube And L
89. IN FREE TITIUS m Z 10 05 4 PINS OHMS 6 9 6 in lbs 0 11 CSS1toCSS2 324to 334 8 20 in bs 023 10 in lbs CSS 2 0 55 3 1648 to 1656 iu 056 CSS 110 55 3 198010 1988 5 16 11 165 152 3 8 20 ft lbs 2 76 CSS1toCSS2 980to 988 Hee CSS 2to CSS 3 1000 to 1008 1 2 43 ft lbs 5 94 CSS 1to CSS 3 1980 to 1988 27 CSS 110 55 2 1633 to 1641 124 165 CSS 210 CSS 3 347 to 355 CSS 110 55 3 1980 to 1988 82 5 in lbs 145 2 in lbs 22 0 ft lbs 34 1 ft lbs 47 3 ft lbs 62 7 ft lbs 101 2 ft lbs 136 4 ft lbs PART MAIN BEARING Main Bearing Diameter Main Bearing J ournal Diameter PUMP END Main Bearing Diameter Main Bearing J ournal Diameter CONNECTING ROD Piston Pin Bearing CRANKPIN DIAMETER Throw 28 CFM CRANKPIN DIAMETER Throw 37 CFM CRANKPIN DIAMETER Throw 41 CFM THRUST WASHER Thickness 28 amp 37 CFM THRUST WASHER Thickness 41 CFM CYLINDERS Bore Piston Diameter Piston Pin Diameter Piston Ring Gap Piston Ring Side Clearance 28 amp 37 CFM Piston Ring Side Clearance 41 CFM Table 4 4 Wear Limits For Compressors FACTORY MAXIMUM INCHES WM INCHES 1 6268 41 3207 0020 1 6233 41 2318 0020 1 3760 34 9504 0020 1 3735 34 8869 0020 1 3768 34 9707 0020 7 nere omno 1 3735 34 8869 0025 wom _ 1 3735 34 8869 0025
90. IRS In Range TC Cooling TH Heating TQ Quench TU Utility Two Speed M otors INDICATING LIGHTS Cool Defrost In Range Heat POWER CIRCUIT Compressor Condenser Fan M otor Heaters Evaporator Fan M otors De energized at set points above 10 14 gt De energized De energized De energized De energized Energized De energized De energized Energized Energized Energized Refer to para De energized Refer to para De energized De energized graph 1 16 c graph 1 16 c OFF OFF OFF OFF ON Closed If supply air is within 2 C 3 6 F of set point gt ON OFF ON OFF OFF OFF OFF ON ON ON Refer to N A N A N A N A paragraph 1 16 c Energized with controller settings above 10 14 gt ON OFF ON OFF OFF OFF OFF OFF OFF ON On If supply air is within 2 C 3 5 F of set point ON ON ON Energized De energized Energized De energized De energized Energized De energized Energized De energized De energized De energized De energized Energized Energized Energized Energized Energized Energized Energized De energized Unit with optional Humidistat Refer to section 1 7 N A Not Applicable 2 6 Table 2 2 Electrical Control Positions Below 10 C 14 CONTROL CIRCUIT COOLING HOLDING Dehumidifica HEATING DEFROST ZONE tion coo Contactor Energized De energized De energized Ene cn M otor Energized De energized De energized MU AST Energ
91. LIGHT CAMBER HIGH PRESSURE SWITCH HEATER CONTACTOR HEAT TERMINATION THERMOSTAT INTERNAL PROTECTOR IN RANGE LIGHT GREEN CONTROLLER RELAY CIN RANGE MANUAL DEFROST SWITCH REMOTE MONITORING RECEPTACLE RETURN TEMPERATURE SENSOR SET TEMP DISPLAY SWITCH SOLENOID MODULATING VALVE SCALE SELECTOR SWITCH SUCTION SOLENOID THERMOSTAT SUCTION SOLENOID VALVE START STOP SWITCH SUPPLY TEMPERATURE SENSOR CONTROLLER TERMINAL TERMINAL BLOCK CONNECTION CONTROLLER RELAY COOLING TIME DELAY OVERRIDE SWITCH CONTROLLER RELAY CHEATING CONTROLLER RELAY UTILITY CONTROLLER RELAY CQUENCH NOT USED TRANSFORMER TRANSFORMER TEMPERATURE SIMULATOR SWITCH HOUR METER COMPRESSOR UNLOADER SOLENOID R22 OPTION VOLTAGE SWITCH Figure 5 17 Electrical Wiring Schematic 69NT40 464 4 Sheet 1 of 2 5 34 A B
92. N I p u 193736 2 N 1081502 3HnlvH3dW3l 5 3411 13 N noe JHI aG JOHINOO iN3UHD2 9NIWIL HOLIMS n 76187272 OL 5 all 3 ATddnS im WY 8 8 3uvdS NJ Kesas a ro 9 A a L 1595 11 wo OO 2 8 puri EE 699 3 ial E i dom ess 1 1 9555 9 6 2 LA po g Ol gum amp CT n 885 1444 248 1 LP 9 f NEN 8 lt Y 8 gt d 5 o c C o ger eu CxO of a of o 9 113 5 MDS Qn ARTWORK BENT35 1248 REV 281 ea LOuH 9 u SST 22 4 ST2 EMP2 1 D 1 rs 956 22 EM1 EF23 18 69 rs P2 enp2 EMG EMG GRD ety Ceza D2 EIS Bese D 195 4221 DS 42
93. Oil Pickup Tube 4 Oil Inlet Port Figure 4 7 Gear Oil Pump and Bearing H ead g Bevery careful not to damage the motor windings when removing the motor end cover as the cover fits over the winding coils Remove all capscrews except one in the top of the cover Then while holding the cover in place remove the remaining capscrew Do not allow the cover to drop from its own weight To prevent striking the winding move the cover off horizontally and in line with the motor axis h Remove the refrigerant suction strainer and if it is removed with ease it may be cleaned with solvent and replaced See Figure 4 8 If the strainer is broken corroded or clogged with dirt that is not easily removed replace the strainer Install new gaskets upon reassembly 7 6 5 1 Valve Capscrew 2 Suction Service Valve 3 Valve Gasket 4 Motor End Cover 5 Motor End Cover Gasket 6 Suction Strainer 7 Strainer Screws and Washers Figure 4 8 M otor End Cover i Block the compressor crankshaft so that it cannot turn Use a screw driver to bend back the tabs on the lockwasher and remove the equalizer tube See Figure 4 10 The slinger at the end of the shaft draws vapor from the crankcase It may discharge through a tee or single equalizer tube j If the piston rings extend beyond the cylinder tops the pistons can be pulled through the bottom plate opening after the piston rings are compressed A piston ring squeezer made from sh
94. SWITCH SUPPLY TEMPERATURE SENSOR CONTROLLER TERMINAL TERMINAL BLOCK CONNECTION CONTROLLER RELAY COOLING TIME DELAY TIME DELAY OVERRIDE SWITCH CONTROLLER RELAY CHEATING CONTROLLER RELAY QUENCH NOT USED TRANSFORMER CONTROLLER RELAY UTILITY NOT USED TEMPERATURE SIMULATOR SWITCH COMPRESSOR UNLOADER SOLENOID R22 OPTION VOLTAGE SWITCH WATER PRESSURE SWITCH OPTIONAL Figure 5 7 Electrical Wiring Schematic M 69 40 464 2 Sheet 1 of 2 5 14 B C E Fi 6 H I J L M Q R 2 10 4 50 CABLE vs POWER PLUG
95. Servicing The Water Cooled Condenser 4 14 4 24 Checkout Procedure For Optional Power Transformer 4 16 4 25 Servicing The M odulating Solenoid Valve 4 16 4 26 Controller Checkout Procedure 4 17 4261 Controller PreTrip 4 17 4 26 2 Temperature Control Board Checkout Procedure With TCSM 4 18 4 26 3 Replacing The U nit Main Control Board 4 19 426 4 Printed Circuit Board Cleaning Procedure 4 19 4 26 5 Temperature Set Station Checkout Procedure 4 19 4 26 6 X Temperature Controller Sensor Checkout Procedure 4 20 4267 Replacing Temperature Sensor 4 20 4 27 Thermostatic Expansion Valve 4 20 4 28 Evaporator Fan Motor Capacitors 4 21 4 29 Hi mldistat e EEUU dE Ee 4 22 5 ELECTRICAL WIRING SCHEMATIC AND DIAGRAMS 5 1 5 1 Introducti OT 5 1 Figure 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 2 1 2 2 2 3 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 4 10 4 11 4 12 4 13 4 14 4 15 4 16 4 17 4 18 4 19 4 20 4 21 4 22 4 23 4 24 4 25 4 26 4 27 LIST OF ILLUSTRATIONS Refrigeration Unit
96. amp 69 40 461 7 8 Sheet 1 of 2 5 48 DD Figure 5 24 Electrical Wiring Diagram M odel 69NT40 464 7 amp 69NT40 461 7 8 P62 rd NES N o le gt gt OEE p E Z o Or N J 11r to ups m Tt Poe AN OOOO uu J IOO GXG 2 O 98 an9 Ov L wos ES M dg oe OG fe alla 6 o N 03504 ovAve e d AN ol einen 91050 lti AL 51 91 of ors 149 xd W S HOSNSS V H7HOSNS _ u w 5 5 N Fle E m deus 8 N35
97. b Units equipped with the optional water cooled condenser check charge only on air cooled operation Refrigerant level on water cooled operation will be normally above sight glass Partially block the condenser coil inlet air starting from the front of the condenser coil Increase the area blocked until the compressor discharge pressure is raised to approximately 12 kg cm 175 psig Refrigerant should appear at center line of sight glasson the water cooled condenser If not refer to section 4 4 3 4 2 Units equipped with air cooled condenser only partially block the condenser coil inlet air starting from the front of the condenser coil Increase the area blocked until the compressor discharge pressure increases to approximately 13 kg cm 190 psig with the container temperature about 2 C 35 or 11 kg cm 160 psig with the container temperature about 18 C 0 Allow the system to stabilize for 5 minutes of continuous operation maintaining the head pressure at the proper level Proceed to step c C For units with air cooled condenser only check the liquid line sight glass If the sight glass appears clear with no bubbles visible or only occasional intermittent bubbles then the unit has an adequate charge If the sight glass appears to be flashing or bubbles are constantly moving through the sight glass then the unit may have a low refrigerant charge or the filter drier could be partially plugged refer to section 4 10 If it
98. board item 3 Figure 4 22 and insert temperature control simulator board CTD P N 07 00226 Apply power to unit d Place one probe on TP4 jack DC Com and other probe on the sensor test point either 5 TP6 The two sensor test points on the board are marked S A sensor signal and sensor signal Readings are shown in Table 4 6 4 26 7 Replacing Temperature Sensor b Cutcable 2 inches shoulder of defective sensor and discard defective probe c Cut one wire of existing cable 41 mm 1 5 8 inch shorter than the other wire See Figure 4 24 d Cut one replacement sensor wire opposite color back 41 mm 1 5 8 inch Turn unit power OFF and disconnect power supply Strip back insulation on all wiring 6 35mm 1 4 inch CAUTION Donotallowmoistureto enter wiresplicearea as this may affect the sensor resistance f Slide a large piece of heat shrink tubing over cable and the two small pieces of heat shrink tubing over the wires before adding crimp fittings as shown in Figure 4 25 g Slip crimp fittings over dressed wires keep wire colors together M ake sure wires are pushed into crimp fittings as far as possible and crimp with crimping tool h Solder spliced wires with a 60 tin and 40 lead Rosincore solder i Slide heat shrink tubing over splice so that both ends of tubing cover both ends of crimp as shown in Figure 4 25 j Heat tubing preferably with a flameless heat gun I
99. cel 460V c RI lt r v alfa 1 4503280 5 2 Vz 834 184 az 380 3 50 15 25 1 cc 131 55 lt 6 7 230v T 12 22 rs en 230 3 60 W 217 azl ler Jil 12 131 123 190 8 50 5 E g gt 5 callcr 5 8 4 50 7 CABLE 21 x2 24VAC 121 22 13 123 WP CF ore ciLicz TE 2 SST 185 2557 oo SV P2 P2 ciLica CHT o y TC IP CM 785 HPS uj Pi c P2 69 4 DA RM B e m 70 9 02 7 HL TH HIT 19 Mra PEE 215 DR Jat TIS T20 tn RM hy RM 06 35 ni 2 IRL T24 1 23 NDS o 777 M 2 13 14 15 16 17 2122 uns 1m Pte D P13 2 PEE 23 4 s e 7 ES 65 o 105 5 2 505 1 23458 _13 8 6 5 4 3 2 1 ag 00 88888 PLATE 59NT40 1033 ARTWORK 69NT35 8614 REV FOR REORDERING SPECIFY CTD P N 69NT20 373 107 J Figure 5 7 Electrical Wiring Schematic M 69 40 464 2 Sheet 2 of 2 5 15 gt _ lt
100. complete with a charge of R efrigerant 12 These units can be converted to Refrigerant 22 The electrical schematic has an R 22 option for CDV CHT UV and UVT these parts can be added to convert the unit to R 22 compressor lubricating oil modeindicating lights temperature controller and is ready for operation upon installation Some units are dual voltage units designed to operate on 190 230 or 380 460 vac 3 phase 50 60 hertz power Refer to Table 1 1 and section 1 6 Other units are designed to operate on 380 460 vac 3 phase 50 60 hertz power Operating control power is provided by a single phase transformer which steps down the AC power supply voltage to 24 vac 1 phase control power The temperature controller isa solid state controller Refer to section 1 16 Once the temperature controller is set at desired container temperature the unit will operate automatically to maintain the desired temperature within very close limits The control system automatically selects cooling holding or heating as necessary to maintain the desired temperature within the container The units are equipped with a Partlow dual Simpson probe recorder or a Fuji Kiki or Saginomiya battery driven recorder Also these units are equipped with a digital temperature display switchable for C Refer to section 1 9 WARNING Beware of unannounced starting of the evaporator and condenser fans Do not open condenser fan grille before turn
101. draws 1 3 to 1 6 amps on lead marked D PH See applicable wiring schematic 14 Place simulator switch TH to the left H eaters and TH LED are de energized 15 Place simulator switch TC to the right Relay TC and TC LED energize The compressor and condenser fan motor start 16 Place simulator TQ switch to theright TQ LED energizes Determine that the quench line is getting colder Refer to section 4 12 17 Place TQ switch to the left CAUTION In the next test do not run unit more than five minutes at full modulation without turning quench TQ switch ON right 18 Turn simulator board modulation switch to 5096 modulation point and notice suction pressure drop Turn modulation switch to FULL modulation position and note suction pressure drop A smodulation increases the modulation LED on the simulator board will grow increasingly brighter If modulating valve malfunctions refer to section 4 25 19 Place switch TC to the left TC LED de energizes compressor and condenser fan motor stop 20 Place TU switch to the left TU LED energizes and the evaporator fan motors switch to low speed operation 21 Turn power OFF and disconnect power source and then remove simulator board and install regular temperature board 4 26 3 Replacing the Unit M ain Control Board a Turn OFF unit power and then open the controller door b Disconnect wiring from defective control board Then remove screws securing board to unit
102. find the approximate condensing temperature with the unit running in the cooling mode install a gauge 0 to 36 2 kg cm 0 to 500 psig on the compressor discharge service valve For example if the discharge pressure is 11 4 147 psig and referring to Table47 R 12 temperature pressure chart the 114 147 psig converts to 46 C 115 F If the water cooled condenser is dirty it may be cleaned and de scaled by the following procedure a Turn unit off and disconnect main power b Disconnect water pressure switch tubing by loosening the two flare nuts Install 1 4 inch flare cap on water cooled condenser inlet tube replaces tubing flare nut D e scale tubing if necessary 1 WhatYou Will N eed a Oakite composition No 22 available as a powder in 68 kg 150 Ib and 136 300 Ib b Oakite composition N o 32 available as a liquid in cases each containing 3 785 liters 4 U S gallon bottles and also in carboys of 52 6 kg 116 Ibs net C Clean fresh water d Acid proof pump and containers or bottles with rubber hose 2 What You Will Do Summary a Drain water from condenser tubing circuit Clean water tubes with O akite No 22 to remove mud and slime b Flush De scale water tubes with Oakite No 32 to remove scale d Flush e Neutralize f Flush g Putunit back in service under normal load and check head discharge pressure 3 Detailed Procedure a
103. interval timing to zero paragraph FALLING RISING IRS TEMPERATURE TEMPERATURE IRS 5 2C 3 6_F QUA TE De energizes 1 5 2 7 F S 1 1 8 F In R 0 5 0 9 fre 0 25 ee RN 025 0 5 C 0 9 1 C 1 8 F 1 5 2 7 F 2 3 6 Figure 1 9 Controller Set Point Below 10 14 Return Air Control FALLING RISING ii TEMPERATURE TEMPERATURE Energizes d 2C 3 6F See Note In Range 1 5_C 2 7_F In Range S 1 18 S 0 5 0 9 TCI TS 0 25 C SSS Sees Energizes MODULATED AIR See Note 0 25 SCENE AIR 0 5 C 0 9 F TH De energizes CIRCULATION ONLY 1 1 8 F S AS 1 5 2 7 F De energres 2C 3 6 377199 Figure 1 10 Controller Set Point Above 10 14 Supply Air Control NOTE Switching functions are affected by time delays Refer to paragraph 1 17 k 1 16 SECTION 2 OPERATION 2 1 PRE TRIP INSPECTION Before Starting WARNING Beware of unannounced starting of the evaporator and condenser fan a If container is empty check inside for the following 1 Check channels or T bars on floor for cleanliness Channels must be free of debris for proper air circulation 2 Check container panels in
104. is determined that the filter drier is not restricted then it will be necessary to add some refrigerant to the system Refer to section 4 4 3 44 2 AddingRefrigerant to System Full Charge a Evacuate unit and leave in deep vacuum Refer to section 4 3 b Place drum of R 12 on scale and connect charging line from drum to liquid line valve Purge charging line at liquid line valve and then note weight of drum and refrigerant c Open liquid valve on drum Open liquid line valve half way and allow the liquid refrigerant to flow into the unit until the correct weight of refrigerant has been added as indicated by scales Correct charge is noted in Table 1 1 NOTE It may be necessary to finish charging unit through suction service valve in gas form due to pressure rise in high side of the system efer to section 4 4 3 d Backseat liquid line valve to close off gauge port Close liquid valve on drum Crack connection on charging line at liquid line valve to vent charging line e Start unit in cooling mode Run approximately ten minutes and check the refrigerant charge Refer to paragraph 4 4 1 b 44 3 Adding refrigerant to System Partial Charge Examinetheunit refrigerant system for any evidence of leaks Repair as necessary Refer to section 4 2 b Maintain the conditions outlined in section 4 4 1 c Fully backseat to close off gauge port the suction service valve see Figure 1 3 and remove the 1 4
105. m aoe O a EN L 1595 co t ar Od L4 L1 2 P3 or 8 8 5 O hess LOS e 5 i pone 4 amp gt s 9565 LA T E s o 2 Or abs 4 BB ar H gt f wey Edd4 v nre n 5244 Or m 4 gt 2 a o219 e s FD gei 9 i 8 0 lt gt L TE Ou a O48 m a N e H E oa Late ip 89 OOO N ARTWORK BENT35 8884 REV Figure 5 12 Electrical Wiring Diagram M 69NT40 464 8 Units starting with S N 90105384 Sheet 1 of 2 5 24 DHBL bxc 10 x HR22 M N vSP4 VSK4 m m 22 4 Gyo EF21 HR21 f E A 1 DHBR VSV4 5 1 514 HR23 DHTR 2 Hye EMI 2 DPH dus 5 EF23 22 2 7 EMG 5 8 p 3 2 X RTS GRD X ay Cy
106. may also exist with replacement piston assemblies If double ring pistons and ring sets are to beinstalled both compression rings must be installed Also double ring and single ring pistons may be installed in the compressor 2 Thecompression ring is chamfered on the inside circumference This ring is installed with the chamfer towards the top If using a double ring piston stagger the ring end gaps so they are not aligned The gap between the ends of the piston rings be checked with a feeler gauge by inserting the ring into the piston bore about one inch below the top of the bore Square the ring in the bore by pushing it slightly with a piston The maximum and minimum allowable ring gaps are 0 33 and 0 127 mm 0 013 and 0 005 inch Compression Ring Figure 4 13 Piston Rings C Installing the Components 1 Install the crankshaft through the pump end of the compressor Do not damage main bearings Push pistons from the inside of the crankcase through the cylinders being careful not to break the rings Place chamfered side of connecting rod against radius of crankpins Install matching connecting rod caps through bottom cover plate 2 The oil screen located in the bottom of the crankcase is connected to the inlet of the oil pump W henever the compressor crankcase is opened inspect 4 7 the screen for holes or an accumulation of dirt The screen can be cleaned with a suitable solvent There are two types of oil
107. of the system c Remove refrigerant using a refrigerant recovery system and repair any leaks d Evacuate and dehydrate the unit Refer to section 4 3 e Charge unit per section 4 4 4 3 EVACUATION AND DEHYDRATION 43 1 General Moisture is the deadly enemy of refrigeration Systems The presence of moisture in a refrigeration system can have many undesirable effects The most common are copper plating acid sludge formation freezing up of metering devices by free water and formation of acids resulting in metal corrosion 4 3 2 Preparation a Evacuate and dehydrate only after pressure leak test Refer to section 4 2 b Essential tools to properly evacuate and dehydrate any system include a vacuum pump 8 5 volume displacement P N 07 00176 01 and electronic vacuum gauge Keep the ambient temperature above 15 6 C 60 to speed evaporation of moisture If ambient temperature is lower than 15 6 60 ice might form before moisture removal is complete H eat lamps or alternate sources of heat may be used to raise the system temperature 4 1 d Replace the filter drier with a section of copper tubing with the appropiate fittings This idea will help speed up the evacuation procedure 4 3 3 Procedure l 6 N 12
108. pumps vane and gear See Figure 4 3 to identify which oil pump is used then follow the correct procedure below Vane Oil Pump SeeFigure 4 6 a Install the bearing head assembly with a new gasket on the compressor crankshaft Carefully push oil pump on by hand ensuring that the bearing head mounts flush to the crankcase body The top of the bearing head is marked on the mounting flange b Alignthe gasket and install the eight capscrewsinthe mounting flange c Install the drive segment with the two capscrewsand lock washer d Insert the oil feed guide with the large diameter in Insert the guide retaining spring so that it fits over the smaller diameter of the feed guide The pump cover can now be installed e Place the pump cover with a new gasket over the guide retaining spring and compressthe spring to enable installation of the cover capscrews Gear Oil Pump SeeFigure 4 7 a Install the pump end thrust washer on the two dowel pins located on the bearing head CAUTION Ensure that the thrust washer does not fall off the dowel pins while installing the oil pump b Install the bearing head assembly with a new gasket on the compressor crankshaft Carefully push the oil pump on by hand ensuring that the thrust washer remains on the dowel pins the tang on the end of the drive segment engages the slot in the crankshaft and the oil inlet port on the pump is aligned with the oil pickup tube in the crankcase The
109. refrigerant vapor is admitted to the shell side and is condensed on the outer surface of the coil For operation of the refrigeration unit with the water cooled condenser do the following a Connect water supply line to inlet side of condenser and discharge line to outlet side of condenser b Maintaina flowrate of 11 to 26litres 3070 5 gallons per minute The water pressure switch will open to de energize the condenser fan relay The condenser fan motor will stop and will remain stopped until the water pressure switch closes refrigeration unit operating with the water cooled condenser will perform as outlined in section 2 4 except that the condenser fan motor is stopped in all modes To shift to air cooled condenser operation do the following Disconnect the water supply and the discharge line to the water cooled condenser The refrigeration unit will shift to air cooled condenser operation when the water pressure switch closes Refer to paragraph 1 3 0 113 REMOTE MONITORING RECEPTACLE AND CIRCUIT When the remote monitor is connected to the remote monitoring receptacle Figure 1 1 the following remote circuits are energized Circuit Function Sockets B toA Sockets C to A Sockets D to A Energizes remote cool light Energizes remote defrost light Energizes remote in range light Note The in range light will be illuminated if the container return air temperature is within 2 C 3 6 F Refer to paragraph
110. the defrost cycle and the unit returns to its normal function 54 5 130 heat termination thermostat will open the circuit if the defrost mode does not terminate at 24 75 F TO CONTROL TRANSFORMER F 6 AMP ST 2 5 TB3 15 1 11 13 Energized Circuit De energized Circuit Figure 2 3 Defrost CONTROL CIRCUIT co Contactor Condenser Fan M otor Contactor CF One Speed Evaporator M otor Relay EF Two Speed Evaporator M otor Relay EF Two Speed Evaporator M otor Relay ES Defrost Relay DR Heater Relay HR Quench Solenoid QV Table 2 1 Electrical Control Positions Above 10 C 14 F COOLING HOLDING Dehumidifica HEATING ZONE tion Energized De energized Energized De energized Energized De energized Energized De energized Energized Energized Energized Energized Energized at set points above 10 14 DEFROST De energized De energized De energized De energized CONTROLLER RELAYS DR Defrost
111. z e v a AL a OL 21 f HL AWS OL w916 14 NIGTHOSNSS V7H7HOSNaS _ u u 5 5 N E Je E m 8 Nas 10v 9 9 i 4 z U amp zreT Ta 999 2 ers lt 51 2 B e 5409 915 es 916 shosia 179 9551 19 s 9 915 52519 1 c 193796 5 4 a afe jestad gt 611 N tL e e o 5 8 2 uH 2551 ld E OTTTTTTT uH 2 55187 gt 5 z tag t 1 E aus TORY 54 159142 p n 10 0 0 m m 235 1 Hsia 22 in N J JJ 123136 IS nN 7051409 3HnlVH3dHil 6 3411 13 UN JOHINOO INSHH O 8 ONIWIL HOLIMS AN ane wo D 3 AJdddns H3MOd im SIT ol A N 1 8 amp 4 S 3uvdS NJ m 11 X x A 505 amp B E EP 5 p I SIO Li L1 4 T a rou Ep a 1556 o eoe F peer Y amp a OR o 2 EE HM dm sia N 42 5 9555 lt 84 3 a 84 o 9 9 Ld A 85 5 5 4 a 8 lt a 2OO RO f NN o z 5 1 a Sed i v n a e cj 2 atO Be R
112. 001600 09 Mo e 9 vsP4 EMT3 CF21 HR22 2 cep M cag EF23 EMT3 7 CMT2 HR23 TRH3 22 CB21 Gum d G CO SEP 22 22 T l SA4 542 VSL2 5 i eee al ve 21 1 VA 11 3 9 9 99 eso 9 TR vsp2 CM VSN1 J ape m N vsF4 23 u Q 5 ve 5 2 5 9 22 1 hee JLK VSA3 vsc3 VSA2 vsc2 183 vsB3 vsB2 511 RN S GRD CPB 7 ver GRD I 1 24 Ges 88 BR 858 5 OLSE 44 66 5 4 2 3 BK W 77 1p a gt VV BK W R 6 TBS TB3 2 15 19 RI 52 T3 T 2 460 3 60 230 3 PLATE 69NT 20 3253 ARTWORK 9 20 3654 REV E Figure 5 22 Electrical Wiring Diagram M 69 20 284 3 Sheet 2 of 2 5 45 20 K3 M10 E2 3 E4 M10 K5 M8 L10 H10 P5 J10 P2 4 K16 F 118 L16 17 J13 KS F12 H15 115 M6 7 M12 E F9 P7 8 67 015 M11 K10 K4 M11 111 F 68 H J10 M13 13 615 H14 J M13 L M10 16 17 J18 614 H 116 17 L9 M9
113. 1 H10 P5 J10 P2 4 K16 F I18 M5 L5 M5 L5 L16 17 J13 K5 11 12 15 115 M6 7 M11 8 67 015 12 K10 K4 M12 112 69 10 13 615 14 J M13 L M10 N16 17 J18 G14 116 17 M9 68 17 1 10 10 12 15 17 12 115 11 15 H J4 6 19 F11 L15 16 17 8 18 SYMBOL APS CHT CL CLT CM CP 55 DD DHBL DHBR DHTL DHTR DIS DL DPH DR DTT FLA HL HPS HR HTT TRL IRS MDS RM RTS SDS SMV 555 55 SSV ST 575 05 TQ TR TT TU TSS UV VS WP LEGEND DESCRIPTION AIR PRESSURE SWITCH COMPRESSOR CONTACTOR CIRCUIT BREAKER 460V CIRCUIT BREAKER 230V CAPILLARY DE SUPERHEATER VALVE R22 OPTION CONDENSER FAN CONTACTOR CYLINDER HEAD THERMOSTAT R22 OPTION COOL LIGHT WHITE CURRENT LIMITING TRANSFORMER CONDENSER FAN MOTOR COMPRESSOR MOTOR TEMPERATURE SET STATION DIGITAL DISPLAY DEFROST HEATER BOTTOM LEFT DEFROST HEATER BOTTOM RIGHT DEFROST HEATER LEFT DEFROST HEATER TOP RIGHT DEFROST INTERVAL SELECTOR DEFROST LIGHT CAMBER DRAIN PAN HEATER DEFROST RELAY DEFROST TERMINATION THERMOSTAT EVAPORATOR FAN CONTACTOR EVAPORATOR FAN MOTOR FUSE FULL LOAD AMPS HEAT LIGHT CAMBER HIGH PRESSURE SWITCH HEATER CONTACTOR HEAT TERMINATION THERMOSTAT INTERNAL PROTECTOR IN RANGE LIGHT GREEN CONTROLLER RELAY CIN RANGE MANUAL
114. 1 16 n 114 SUCTION SOLENOID VALVE M 69NT40 The suction solenoid valve shown in Figure 1 3 is controlled by the suction solenoid thermostat located on the evaporator fan motor deck as shown in Figure 1 2 In operation if the return air temperature decreases to 12 2 C 10 the suction solenoid thermostat SST closesto energize the suction solenoid valve which opens to increase the refrigerant flow rate and cooling capacity The thermostat opens with increasing return air temperatureat 71 3 20 6 F tode energizethe valve 1 15 FROST FORMATION ON COMPRESSORS Note Some models have a thermostatic expansion quench valve so frost formation on the compressor is not applicable To see which models use a solenoid quench valve refer to section 5 Frost may in normal operation form on the compressor suction service valve and end bell This is caused by normal quench valve operation in conjunction with the suction modulation valve Figure 1 7A showsthe allowable frost limit pattern for units operating with the controller set point above 10 C 14 F This frost pattern is described below The temperature controller varies the amount of current through the suction modulation valve coil which inturn increasesor decreasesthe amount of restriction in the suction line so that the net cooling capacity of the unit will match the cooling required to maintain the load at set point When the suction modulation valv
115. 2 K10 K4 M12 112 F G9 H J10 M13 F13 615 H14 J M13 L M10 N16 17 J18 G14 116 17 3 68 17 I L10 F10 12 K15 411 17 112 115 H J4 6 C E16 17 M8 L8 SYMBOL C CB2 CDV CF CHT CL CM CP css DD DHBL DHBR DHTL DHTR DIS DL DPH DR EF EM FLA HL HPS HR HTT IRL IRS MDS RM RTS SDS SMV SSS SST SSV ST STS TB TC TD TDS TH TQ TR TU TSS UV VS WP LEGEND DESCRIPTION COMPRESSOR CONTACTOR CIRCUIT BREAKER 460V CIRCUIT BREAKER 230V CAPILLARY DE SUPERHEATER VALVE R22 OPTION CONDENSER FAN CONTACTOR CYLINDER HEAD THERMOSTAT R22 OPTION COOL LIGHT WHITE CURRENT LIMITING TRANSFORMER CONDENSER FAN MOTOR COMPRESSOR MOTOR TEMPERATURE SET STATION DIGITAL DISPLAY DEFROST HEATER BOTTOM LEFT DEFROST HEATER BOTTOM RIGHT DEFROST HEATER TOP LEFT DEFROST HEATER TOP RIGHT DEFROST INTERVAL SELECTOR DEFROST LIGHT CAMBER DRAIN PAN HEATER DEFROST RELAY DEFROST TERMINATION THERMOSTAT EVAPORATOR FAN CONTACTOR EVAPORATOR FAN MOTOR FUSE FULL LOAD AMPS HEAT LIGHT CAMBER HIGH PRESSURE SWITCH HEATER CONTACTOR HEAT TERMINATION THERMOSTAT INTERNAL PROTECTOR IN RANGE LIGHT GREEN CONTROLLER RELAY IN RANGE MANUAL DEFROST SWITCH REMOTE MONITORING RECEPTACLE RETURN TEMPERATURE SENSOR SET TEMP DISPLAY SWITCH SOLENOID MODULATING VALVE SCALE SELECTOR SWITCH SUCTION SOLENOID THERMOSTAT SUCTION SOLENOID VALVE START STOP
116. 26 69 20 3634 REV 2j Figure 5 21 Electrical Wiring Schematic 69 20 284 3 Sheet 2 of 2 5 43 Sheet 1 of 2 5 44 DD Figure 5 22 Electrical Wiring Diagram 69 20 284 3 P62 a 4 ls gt 6 te oF Scri Ad P nin N o ES m 0 o p OO O CHO 00 9 G8 ONAvVC E LL od c e 9 8 m OW NA gt o gt o 9 V g 03504 ovare 1 ms 33 2 3 Ere e 8 e ow 2 AL DL 91
117. 3 SERVICING THE WATER COOLED CONDENSER rotate span a NOTE When akite compound No 32 is being used for the first time the local O akite Technical Service representative should be called in for his suggestions in planning the procedure He will show you how to do the work with a minimum dismantling of equipment how to estimate the time and amount of compound required how to prepare the solution how to control and conclude the de scaling operation by rinsing and neutralizing equipment before putting it back into service His knowledge of metals types of scale water conditions and de scaling techniques will be invaluable to you The water cooled condenser is of the shell and coil type with circulating water through the cupro nickel coil Therefrigerant vapor is admitted to the shell side and is condensed on the outer surface of the coil Rust scale and slime on the water cooling surfaces inside of the coil interfere with the transfer of heat reduce system capacity cause higher head pressures increase the load on the system By checking the leaving water temperature and the actual condensing temperature it can be determined if the condenser coil is becoming dirty A larger than normal difference between leaving condensing water temperature and actual condensing temperature coupled with a small difference in temperature of entering and leaving condensing water isan indication of a dirty condensing coil To
118. 5 35 g 8 8 35712 5 5 amp Saa 2 915 e 2 o essifz 16 1 18 500 9 915 d 5 E Fal JILIN WIL 915 0514 amp S 2112 9551 9 E raa S 0 9 915 5 51 Q r551 5 S R 1179 pis E woo 20 103135 9 510 zaa 2189 m dn Q33ds a S LC UV 1 2 5 GLEBE D r A 2 RARERER 285 1 151 2222 aiio Lis N a all m st aL 7081409 TX 8 in 16107272 OL 8 all SUI 3 AON 8 19 ON 11 2505 25 5 28 1505 gt cr cr m _ L1 7 Q lt gt lt gt 1666 25554 a 15 4556 o a a 9 gss 2 P 5 5 2 g xA 8 8 5 x LIMES 9 T RR 4 4 66 Cr n f eld a E 4 5 54 15 DAS 8 924 94d in 8 iid 8 ARTWORK _59NT35 8354 REV Figure 5 6 Electrical Wiring Diagram M odel 69NT40 464 1 PLATE 69NT35 9883 ARTWORK 69NT35 8364 REV ie
119. 8 5 temperature Automatic Reset 350 10 F Closesat 150 7 C 300 12 F 11 Return air temperature below 3 9 Safety override temperature 11 Opens to stop the unit 25 F Set points above 10_ 14 a Full Open or Closed Positions Display will read in degrees centigrade C with the M aximum air flow is achieved by loosening the wing nutsand movingthe cover to the maximum open position 10096 position The closed position is 096 air flow position The operator may also adjust the openingto increase or decrease the air flow volume to meet the required air flow b Air Sampling for Carbon Dioxide CO 2 Level Loosen wing nuts and move cover until the arrow on the cover is aligned with the atmosphere sampling port label Tighten wing nuts and attach 3 8 tube to the sampling tube If the internal atmosphere content has reached an unacceptable level the operator may adjust the cover opening to meet the required air flow volume to ventilate the container 19 DIGITAL TEMPERATURE DISPLAY The digital temperature display receives signalsfrom the controller and normally displays temperature at the active controller probe return air temperature sensor RTS or supply air temperature sensor STS Depressing the set display switch SDS momentary contact will display the controller set point temperature while depressed Display is selectable in celsius or fahrenheit Placing the scale selector switch in the dow
120. ACTOR CIRCUIT BREAKER 460V CIRCUIT BREAKER 230V CAPILLARY DE SUPERHEATER VALVE R22 OPTION CONDENSER FAN CONTACTOR CYLINDER HEAD THERMOSTAT R22 OPTION COOL LIGHT WHITE CURRENT LIMITING TRANSFORMER CONDENSER FAN MOTOR COMPRESSOR MOTOR TEMPERATURE SET STATION DIGITAL DISPLAY DEFROST HEATER BOTTOM LEFT DEFROST HEATER BOTTOM RIGHT DEFROST HEATER TOP LEFT DEFROST HEATER TOP RIGHT DEFROST INTERVAL SELECTOR DEFROST LIGHT CAMBER DRAIN PAN HEATER DEFROST RELAY DEFROST TERMINATION THERMOSTAT EVAPORATOR FAN CONTACTOR EVAPORATOR FAN MOTOR FUSE FULL LOAD AMPS HEAT LIGHT CAMBER HIGH PRESSURE SWITCH HEATER CONTACTOR HEAT TERMINATION THERMOSTAT INTERNAL PROTECTOR IN RANGE LIGHT GREEN CONTROLLER RELAY IN RANGEJ MANUAL DEFROST SWITCH QUENCH VALVE REMOTE MONITORING RECEPTACLE RETURN TEMPERATURE SENSOR SET TEMP DISPLAY SWITCH SOLENOID MODULATING VALVE SCALE SELECTOR SWITCH SUCTION SOLENOID THERMOSTAT SUCTION SOLENOID VALVE START STOP SWITCH SUPPLY TEMPERATURE SENSOR CONTROLLER TERMINAL TERMINAL BLOCK CONNECTION CONTROLLER RELAY COOLING TIME DELAY OVERRIDE SWITCH CONTROLLER RELAY CHEATING CONTROLLER RELAY QUENCH TRANSFORMER CONTROLLER RELAY UTILITY NOT USED TEMPERATURE SIMULATOR SWITCH COMPRESSOR UNLOADER SOLENOID R22 OPTION VOLTAGE SWITCH WATER PRESSURE SWITCH OPTIONAL Figure 5 9 Electrical Wiring Schematic M odel 69NT40 464 8 Units with S N 90105284 thru 90105383 Sheet 1
121. C8 69 H9 L11 E11 F15 J14 L10 L11 L13 017 J18 114 H17 67 17 69 19 9 9 ES E10 J15 1 610 115 612 613 L15 IS E1 19 017 8 M9 L9 F2 F4 SYMBOL APS C CB2 CDV CF CHT CL CM CP CSS DD DHBL DHBR DHTL DHTR DIS DL DPH DR EF EM ES FLA HL 5 HR HTT TRL IRS MDS RM RTS SDS SMV SSS ST STS T TB TC TDS TH TU TQ TR TRANS AUTO TSS TE UV UVT VS LEG END DESCRIPTION AIR PRESSURE SWITCH COMPRESSOR CONTACTOR CIRCUIT BREAKER 460V CIRCUIT BREAKER 230V CAPILLARY DE SUPERHEATER VALVE R22 OPTION CONDENSER FAN CONTACTOR CYLINDER HEAD THERMOSTAT R22 OPTION COOL LIGHT WHITE CONDENSER FAN MOTOR COMPRESSOR MOTOR TEMPERATURE SET STATION DIGITAL DISPLAY DEFROST HEATER BOTTOM LEFT DEFROST HEATER BOTTOM RIGHT DEFROST HEATER TOP LEFT DEFROST HEATER TOP RIGHT DEFROST INTERVAL SELECTOR DEFROST LIGHT AMBER DRAIN PAN HEATER DEFROST RELAY DEFROST TERMINATION THERMOSTAT EVAPORATOR FAN CONTACTOR HIGH SPEED EVAPORATOR FAN MOTOR EVAPORATOR FAN CONTACTOR LOW SPEED FUSE FULL LOAD AMPS HEAT LIGHT CAMBER HIGH PRESSURE SWITCH HEATER CONTACTOR HEAT TERMINATION THERMOSTAT INTERNAL PROTECTOR IN RANGE LIGHT GREEN CONTROLLER RELAY IN RANGE MANUAL DEFROST SWITCH REMOTE MONITORING RECEPTACLE RETURN TEMPERATURE SENSOR SET TEMP DISPLAY SWITCH SOLENOID MODULATING VALVE SCALE SELECTOR SWITCH START STOP S
122. CALE SEL SUCTION S SUCTION S START STO SUPPLY TE CONTROLLE TERMINAL CONTROLLE TIME DELA CONTROLLE TRANSFORM A A TEMPERATU REAKER 460V REAKER 230V DE SUPERHEATER VALVE FAN CONTACTOR T WHITE IMITING TRANSFORMER FAN MOTOR R MOTOR RE SET STATION ISPLAY EATER BOTTOM LEFT EATER BOTTOM RIGHT EATER TOP LEFT EATER TOP RIGHT NTERVAL SELECTOR IGHT CAMBER HEATER ELAY ERMINATION THERMOSTAT R FAN CONTACTOR R FAN MOTOR AMPS T CAMBER SURE SWITCH NTACTOR INATION THERMOSTAT PROTECTOR LIGHT GREEN RELAY CIN RANGE FROST SWITCH NITORING RECEPTACLE MPERATURE SENSOR DISPLAY SWITCH MODULATING VALVE ECTOR SWITCH OLENOID THERMOSTAT OLENOID VALVE P SWITCH MPERATURE SENSOR R TERMINAL BLOCK CONNECTION R RELAY CCOOLING2 Y OVERRIDE SWITCH R RELAY CHEATING ER RE SIMULATOR SWITCH R22 OPTION HEAD THERMOSTAT R22 OPTION CONTROLLER RELAY CUTILITY NOT USED COMPRESSOR UNLOADER SOLENOID R22 OPTION VOLTAGE S WITCH WATER PRESSURE SWITCH COPTIONAL Figure 5 11 Electrical Wiring Schematic M 69NT40 464 8 Units starting with S N 90105384 Sheet 1 o 5 22 f 2
123. Control Switch Optional Scale Selector Switch Relay 24 vac w 12 vdc coil Main Control Board Contol Relays CR amp KR Optional Figure 1 4 Control Box and Controller Units with Two Speed E vaporator M otors 1 6 gt UNITS WITH ONE SPEED EVAPORATOR MOTORS Power Supply and In Range Board Timing and Current Control Board Temperature Control Board Fuse Location 3A Temperature Simulator Switch Defrost Interval Selector Time Delay Override Switch Set Temperature Display Switch Temperature Selector Condenser Fan Motor Relay Evaporator Fan Motor Relay Heat Relay 13 14 15 16 17 18 19 20 21 22 23 Compressor Contactor Voltage Switch Circuit Breaker 230v Circuit Breaker 460v Control Fuse 6A
124. DEFROST SWITCH REMOTE MONITORING RECEPTACLE RETURN TEMPERATURE SENSOR SET TEMP DISPLAY SWITCH SOLENOID MODULATING VALVE SCALE SELECTOR SWITCH SUCTION SOLENOID THERMOSTAT SUCTION SOLENOID VALVE START STOP SWITCH SUPPLY TEMPERATURE SENSOR CONTROLLER TERMINAL TERMINAL BLOCK CONNECTION CONTROLLER RELAY COOLING TIME DELAY OVERRIDE SWITCH CONTROLLER RELAY HEATING CONTROLLER RELAY USED TRANSFORMER HOUR METER CONTROLLER RELAY CUTILITY NOT USED TEMPERATURE SIMULATOR SWITCH COMPRESSOR UNLOADER SOLENOID R22 OPTION VOLTAGE SWITCH WATER PRESSURE SWITCH OPTIONAL Figure 5 5 Electrical Wiring Schematic M 69NT40 464 1 Sheet 1 of 2 5 10
125. E 221 100 o oe m o4 EL 2 XS a 240 A za e 1 Q MI cs ZIW 5 2 8 5 pp 6 No 5 eno 1 42 4 t SEL 4 me m m 5 FJ 1342 V x iza Y jj 5 j YY YY 3 cete a 8l O ca 91 rn nn N lt N 4 ws 4 Heina X gt SL e gt ZINA 090 0 5 E A EMG 9 a4 4e OS Bo AQ B lt ZONE K3 M10 2 3 4 10 M8 110 110 MI H10 P5 J10 P2 4 F 118 MS 15 5 15 116 17 J13 K5 11 12 15 115 6 7 11 E F9 P7 8 67 D15 M12 K10 K4 M12 112 F G9 H J10 M13 F13 615 H14 J11 J M13 L M10 N16 17 J18 G14 H 116 17 9 M9 68 17 I L10 10 12 15 17 112 115 11 15 H J4 6 C E16 17 M8 L8 SYMBOL C CB2 CDV CF CHT CL CM CP css DD DHBL DHBR DHTL DHTR DIS DL DPH DR EF EM FLA HL HPS HR HTT IRL IRS MDS Qv RM RTS SDS SMV 555 SST SSV ST STS TB TC TDS TH TQ TR TU TSS UV VS WP LEGEND DESCRIPTION COMPRESSOR CONT
126. F position and cuta 2 54 oneinch slitin the insulation of the 1 4 inch quench line approximately 10 cm 4 inches pastthe outlet of the quench valve See Figure 1 3 2 Usingacalibrated Simpson meter firmly secure the thermistor bulb against the copper tube and insulate opening with tape or Presstite 3 Set controller setting knob at 3 C 26 6 F and start the unit M ove the temperature simulator switch in the controller to 0 C 32 F setting and hold in this position 4 Depressthetime delay override switch and hold in this position during test 5 Slowly turn the control setting knob from 3 C 26 6 F towards 0 C 32 F until the TQ light emitting diode LED lights At this time the quench solenoid should open and a temperature drop of approximately 9 4 to 6 7 C 15 to 20 F will be noted on Simpson meter after one minute 6 Refer to paragraphs 4 12 b and 4 23 if the temperature does not drop rapidly b Replacing Solenoid Valve Coil The coil may be removed without removing the refrigerant Remove screw lockwasher and coil Disconnect leads and remove coil Verify new coil type voltage and frequency This information appears on the coil housing Place new coil on valve stem and secure same 413 REPLACING THE EVAPORATOR COIL AND HEATER ASSEMBLY The evaporator section including the coil should be cleaned with fresh water or steam preferably Another recommendation is to use O akite 202 or si
127. G pan 230V lt gt Ty A21 11 121 8 B2 2305300 Sep z 3 21 Igi 121 22 a5 g 190 3 50 ISTER core c2 m 181 3 H3 1 6 Fi lar 10 4 50 121 122 POWER i RI lt 1 BK nl 450 3 50 52 lt W 12 dom 5351154 BANT 13 lt R B aa lt 6 zm 777 HQ ouo off 13 123 x2 xt 24VAC 6 O1 AN 2 PI P2 P2 1 E TRANS 3 Es EAS pyur TC IP CP CAUTO m3 5 nn T9 T31 85 919 rS RN B ce HL TH HIT gt HR 2 RM RN ae IRS Ree iri 124 123 pq m TU Tat Fre 4 T5 41 31 61 2 5 DR us 4 T19 1 T20 PA m RM lt OX 5 ES n MDS o W 2 B 13 14 15 6 17 zi 22 185 uec rre rim P7 PB PS 2 3 6 7 PT 5 12 P 4 2 8 LIL PEE T8 T8 7 TDS 505 2 3 5 5 7 6 5 4 312 ay DD PLATE 88888 69NT20 3083 ARTWORK FOR REORDERING SPECIFY 69120 34564 CTD P N 69NT20 373 103 J Figure 5 1 Electrical Wiring Schematic 69NT 20 284 Sheet 2 of 2 5 3 10 11 12 13 14 15 16 17 18 __ Tg ES4t TI amp 1 MV DIT
128. IN MANUAL DEFROST SWITC TORING RE RETURN TEMPERATURE S SET TEMP DISPLAY SW SOLENOID MODULATING SCALE SELECTOR SWITC START STOP SWITCH SUPPLY TEMPERATURE 5 CONTROLLER TERMINAL TERMINAL BLOCK CONNE CONTROLLER RELAY TIME DELAY OVERRIDE 2 lt o m lt o 2 CTOR RMOSTAT gt CEPTACLE ENSOR ITCH VALVE H ENSOR CTION OLING SWITCH CONTROLLER RELAY CHEATING TRANSFORMER CONTROLLER RELAY CUT TEMPERATURE SIMULATO HOUR METER UNLOADER VALUVE R22 UNLOADER VALVE THERM VOLTAGE SWITCH WATER PRESSURE SWITC ILITY NOT USED R SWITCH OPTION OSTAT R22 OPTION H Figure 5 21 Electrical Wiring Schematic M odel 69 20 284 3 Sheet 1 of 2 5 42
129. LAY CHEATING E SIMULATOR SWITCH UNLOADER V ALVE CR22 OPTION gt A U A ES SURE SWITCH OPTIONAL Figure 5 27 Electrical Wiring Schematic M 69NT40 464 10 Sheet 1 of 2 5 54 DE SUPERHEATER VALVE R22 OPTION 10 11 12 13 14 15 16 17 18 B G H I J K E M Q R 11 4 CABLE POWER PLUG RI lt Ma ale 460 3 60 52 lt v 22 Pe ER BRN 3 vas ssl ls as lt GRN YEL T 11 21 777 121 22 123 c c T lt 5 a 1 H4 4 i H3Q 3 5 11121 lg 4 8 24VAC zal 5 rH 11 21 3 8 12 22
130. LENOID VALV START STO P SWITCH SUPPLY TEMPERATURE SENSOR CONTROLLE R TERMINAL TERMINAL BLOCK CONNECTION CONTROLLER RELAY CCOOLING TIME DELAY OVERRIDE SWITCH CONTROLLER RELAY CHEATING TRANSFORMER CONTROLLER RELAY CUTILITY NOT USED TEMPERATU RE SIMULATOR SWITCH COMPRESSO VOLTAGE SWITCH WATER PRE UNLOADER SOLENOID R22 OPTION SSURE SWITCH COPTIONAL Figure 5 23 Electrical Wiring Schematic M odel 69NT40 464 7 amp 69NT40 461 7 8 Sheet 1 of 2 5 46
131. LLER RELAY COOLING TIME DELAY OVERRIDE SWITCH CONTROLLER RELAY HEATING TRANSFORMER CONTROLLER RELAY NOT USED TEMPERATURE SIMULATOR SWITCH CONTROLLER RELAY UTILITY NOT USED UNLOADER VALVE R22 OPTION UNLOADER VALVE THERMOSTAT R22 OPTION Figure 5 15 Electrical Wiring Schematic M odel 69NT20 284 1 amp 284 2 Sheet 1 of 2 5 30 PLATE 69NT20 3083 ARTWORK _ 69 720 3504 B C D E F 6 H I J K M N 10 4 50 POWER RECEPTACLE CABLE 5 T ALS vm m ba Bl 82 460 d meas Y LAC 121 22 m Es TEMP t 5 131123 L lt 7 mila 121 22 131 23 g 5 5 as xi x2 4 8 24VAC ilz EMI AMP 121 22 4 5 13 23 2 m 2 cov oO 1 1 g 1 P2 P2 1 ciLlcz UvT 0 0 0 IP CM 785 784 HPS 187 Sax I1 POR 85 4 TH HIT
132. OST INTERVAL SELECTOR J13 DL DEFROST LIGHT CAMBER KS DPH DRAIN PAN HEATER 11 12 15 DR DEFROST RELAY 115 DTT DEFROST TERMINATION THERMOSTAT M6 7 M11 EF E F9 P7 8 EM E EVAPORATOR FAN MOTOR 67 015 F FUSE FLA gt FULL LOAD AMPS 12 HL HEAT LIGHT CAMBER K10 HPS HIGH PRESSURE SWITCH K4 M12 HR HEATER CONTACTOR 112 HTT HEAT TERMINATION THERMOSTAT F G9 H J10 IP INTERNAL PROTECTOR M13 IRL IN RANGE LIGHT GREEN F13 615 IRS CONTROLLER RELAY IN RANGE H14 MDS MANUAL DEFROST SWITCH J11 QV QUENCH VALVE J M13 L M10 RM REMOTE MONITORING RECEPTACLE N16 17 RTS RETURN TEMPERATURE SENSOR J18 SDS SET TEMP DISPLAY SWITCH G14 SMV SOLENOID MODULATING VALVE 116 17 SSS SCALE SELECTOR SWITCH SST SUCTION SOLENOID THERMOSTAT 9 SSV SUCTION SOLENOID VALVE 68 5 START STOP SWITCH 17 STS SUPPLY TEMPERATURE SENSOR T CONTROLLER TERMINAL I L10 TB TERMINAL BLOCK CONNECTION 210 12 15 s CONTROLLER RELAY COOLING P17 TDS TIME DELAY OVERRIDE SWITCH 12 115 CONTROLLER RELAY CHEATING 11 15 TQ CONTROLLER RELAY QUENCH H J4 6 TR TRANSFORMER PREIS TU gt CONTROLLER RELAY UTILITY C E16 17 TSS TEMPERATURE SIMULATOR SWITCH M8 UV COMPRESSOR UNLOADER SOLENOID R22 OPTION VS VOLTAGE SWITCH L8 WP WATER PRESSURE SWITCH OPTIONAL Figure 5 3 Electrical Wiring Schematic M 69NT 40 464 Sheet 1 of 2
133. RCUIT BR CAPILLARY EAKER 4 CONDENSER FAN CONTACTOR CYLINDER H EAD THERMOSTAT R22 OPTION COO IGHT CWHI TE CURRENT IMITING TRANSFORMER CONDENSER COMPRESSOR FAN MOTOR MOTOR TEMPERATUR E SET STA EFROST HEATE BOTTOM LEFT EFROST HEATE gt EFROST DDD TOP LEFT EFROST HEATER TOP RIGHT TERVAL SELECTOR RAIN PA EFROST RE D D D D DEFROST I D D D EFROST LIGHT CAMBER HEATER AY DEFROST 1 RMINATION THERMOSTAT EVAPORA FAN CONTACTOR R EVAPORATOR FUSE FAN MOTOR FUI OAD AMPS EA IGHT CAMBER IGH PRESSURE SWITCH EATER CO TACTOR T A EA TERMINATIO HERMOSTAT PROTECTOR A gt IGH CGREEND RELAY CIN RANGE2 ROST SWITCH PERATURE SENSOR OLENOID MODULATING ALVE V ENOID THERMOSTAT ENOID VALV SWITCH PERATURE SENSOR TERMINA OCK CONNECTION RELAY COOLING OVERRIDE SWITCH RE
134. Remove complete assembly C Install relays fuses three boards and connect wiring to proper terminals on the replacement control board 4 26 4 Printed Circuit Board Cleaning Procedure a Turn power OFF and remove the printed circuit board from the unit b Clean the surface of the printed circuit board with dry air at low pressure less than 2 4 g cm 20 psig C 11 grease is encountered spray the printed circuit board with anhydrous alcohol If this isnot available use amixture of distilled water and liquid dishwashing soap then rinse the printed circuit board with distilled water Remove grime using clean dry air at low pressure d The printed circuit board can be coated with humiseal P N 07 50001 to protect the components from corrosion Besure notto spraytheterminalsof the molex connectors as the humiseal is a non conductor 4 19 e Spray the connector terminals on the board with contact lubricant P N 07 50003 before the board is inserted back in the unit CAUTION Do not usearomatic hydro carbons chlorinated solvents or freon T F degreaser for cleaning They will react with the plastic materials used in the manufacture of the printed circuit board 1 2 3 4 NI er Power Supply and In Range Board Timing and Current Control Board Temperature Control Board Fuse 3 Amp Utility Relay TU Light Emitting Diode TU LED Que
135. SER FAN CONTACTOR IND ER HEAD THERMOSTAT R22 CO CU IGHT WHITE T LIMITING TRANSFORMER DEN PRE SER FAN MOTOR SSOR MOTOR PER ATURE SET STATION x 2 uo 2 L DISPLAY ROS HEATER BOTTOM LEFT ROS HEATER BOTTOM RIGHT ROS HEATER TOP LEFT ROS HEATER TOP RIGHT ROS INTERVAL SELECTOR ROS IGHT CAMBER IN PAN HEATER OU ROS RELAY OPTION FUSE FROS POR POR TERMINATION THERMOSTA ATOR FAN CONTACTOR ATOR FAN MOTOR OAD AMPS IGHT CAMBER RESSURE SWITCH CONTACTOR ERMINATIO HERMOSTAT gt D gt P LER RELAY CIN RANGE SWITC H RING RECEPTAC ENO TIO PLAY SWITCH ID MODULATING VALVE N SOLENOID THERMOSTAT S 0 TEMPERATURE SENSOR 5 U PER ATURE SET STATION STA SCA CON ER TIM TIO N SOLENOID VALVE ITCH R SWITCH PLY lt 7 ATURE SENSOR TRO MIN CONTRO LER TERMINA AL BLOCK CONNECTION LER RELAY CCOOL ING E D ELAY OVERRIDE SWITCH
136. ST e j ARTWORK _69NT20 3644 REV DHBL li HR22 4 5 4 Gye l Ea oe 1 EF21 HR21 DATE E 1 DHBR VSV4 vsv1 VSJ4 O HR23 T Let EM2 r4 vsP3 1 14 2 m m coc uc EF23 EF22 8 rs Ce UVT EMG 9 2 1 EMG 2 AAA RTS GRD l STS Ko Nu N N ER NO 257 49 x PE SIE CF 5 3 2 5 3 2 5 C ENT up T EMI TE a a 25 15 EMG Ace Q ERES S A am Ee WES vsv2 er21 CF23 DHBL 5 c12 c11 eri 2 c22 C23 t7 t x 010 06 5 g 01010101010 0100101070010 101010001001 o SVX XP ENSE B AUS 18600
137. TRANSICOLD Container Refrigeration U qH rr Z Oc TRANSICOLD OPERATION AND SERVICE MANUAL CONTAINER REFRIGERATION UNIT MODELS 69NT20 284 69NT40 461 69NT40 464 W UNITED DMA TECHNOLOGIES 9 3 CARRIER TRANSICOLD Carrier Transicold Division Carrier Corporation P O Box 4805 Syracuse N Y 13221 Carrier Corporation 1993 D Printed in U S 0393 TABLE OF CONTENTS Section Page 1 DESCRIPTION 1 1 11 IINEPOGUCUION ahaa wend 11 12 General Description 1 2 1 3 Refrigeration System Data 1 8 14 Electrical Data Ex deoa eas 1 8 1 5 Safety Override Thermostat Optional 1 9 1 6 Voltage Switch And Power Transformer Optional 1 9 1 7 Optional 1 9 1 8 Fresh Air Makeup 1 9 1 9 Digital Temperature 15 1 10 1 10 Safety And ProtectiveDevices 1 10 111 Refrigeration Circuit pie um 1 11 1 12 Water Cooled Condenser Water Pressure Switch Optional 1 11 1 13 Remote M onitoring Receptacle An
138. UY L T4 g 3 SPARE pus X N 9 NN NN N N ai m n oo o 8 ro gt gt gt 5 I T PL 7 g lt li P a On QO lt Dom LHI R ih a e ee 8 Iu ax 9 d ae A 5052 IN a X 6 I E amp 5051 7 Cc 5 oa OF n A e 8 8 58 7 _ 5551 0 a 5552 ssss o N Q 996 d 555649 tere 96 e is eur a 5 Bae Op lt gt D mc 3 m lt gt OTE Plon T n p754 Y 8 P7610 e ix Figure 5 14 Electrical Wiring Diagram M 69NT40 464 3 ARTWORK 58NT35 8954 REV V
139. V 4 1 4 INCHES 10 79 EH Figure 4 15 Evaporator Fan L ocating Dimension 4 15 SERVICING THE EVAPORATOR COIL HEATERS WARNING Before servicing unit make sure the unit circuit breaker CB1 and the start stop switch are in the OFF position Also disconnect power plug and cable a Remove the lower access panel 1 1 by removing the T I R locking device lockwire and mounting screws b Determine which heater s need replacing by checking resistance on each heater as shown in paragraph 1 4 e c Remove hold down clamp securing heaters to coil d Liftthe U portion of the heater with opposite end down and away from coil M ove heater left or right enough to clear the heater end support 4 16 CHECKING CALIBRATION OF THE DEFROST AIR SWITCH M ake sure magnehelic gauge is in proper calibration NOTE The magnehelic gauge may be used in any position but must be re zeroed if position of gauge is changed from vertical to horizontal or vice versa USE ONLY IN POSITION FOR WHICH IT IS CALIBRATED a b With air switch in vertical position connect high pressure side of magnehelic gauge to high side connection of air switch See Figure 4 16 Install tee in pressure line to high side connection Teeshould be approximately half way between gauge and air switch or an improper reading may result d Attach an ohmmeter to the air switch electrical contacts
140. WITCH SUPPLY TEMPERATURE SENSOR CONTROLLER TERMINAL TERMINAL BLOCK CONNECTION CONTROLLER RELAY COOLING TIME DELAY OVERRIDE SWITCH CONTROLLER RELAY HEATING CONTROLLER RELAY UTILITY CONTROLLER RELAY QUENCH NOT USED TRANSFORMER TRANSFORMER AUTO TEMPERATURE SIMULATOR SWITCH HOUR METER UNLOADER VALVE R22 OPTION UNLOADER VALVE THERMOSTAT R22 OPTION VOLTAGE SWITCH Figure 5 1 Electrical Wiring Schematic M odel 69N T 20 284 Sheet 1 of 2 5 2 B D E F G H 1 K L M N 0 9 E p TRANS AUTO POWER PLU
141. after motor access panel See Figure 1 1 Remove two lower capscrews securing motor assembly to bracket and then remove Ty Raps from wire harness Loosen two upper capscrews on fan motor assembly Remove or set aside motor to reach capacitors With power OFF discharge the capacitor and disconnect the circuit wiring c Checking the capacitor Three methods for checking capacitors are 1 Direct replacement 2 volt ohmmeter and 3 capacitor analyzer 1 Direct replacement Replace capacitor with one of the same value 2 Volt ohmmeter Set meter on RX 10 000 ohms Connect ohmmeter leads across the capacitor terminals and observe the meter needle If the capacitor is good the needle will make a rapid swing toward zero resistance and then gradually swing back toward a very high resistance reading If the capacitor has failed open the ohmmeter needle will not move when the meter probes touch the terminals If the capadtor is shorted the needle will swing to zero resistance position and stay there 3 Capacitor analyzer Thefunction oftheanalyzer isto read the microfarad value of a capacitor and to detect insulation breakdown under load conditions The important advantages of a analyzer is its ability to locate capacitorsthat have failed to hold their microfarad ratingsor onesthat are breaking down internally during operation It is also useful in identifying capacitors when their microfarad rating marks have become unreadable
142. alve Decompressing the spring will decrease the superheat and increase the refrigerant flow through the valve one complete turn will change the setting approximately 1 7 3 3 Reassemble the valve and then start the unit 4 When the unit has stabilized operation for at least 20 minutes recheck superheat setting 5 fsuperheatsettingis correct remove gauge and thermocouple Secure panel in position 4 28 EVAPORATOR FAN MOTOR CAPACITORS The two speed evaporator fan motors are of the permanent split capacitor type The motor is equipped with one capacitor used in high speed circuit and another capacitor is used for the low speed circuit a When to check for a defective capacitor 1 Fan motor will not change speed For example controller settings above 10 C 14 F cause the motor to run in high speed Controller settings below 10 C 14 F cause the motor to run in low speed 2 Motor running in wrong direction checking for correct wiring application b Removingthe capacitor WARNING M ake sure power to unit is OFF and power plug disconnected before removing capacitor S l The capacitor located on the motor and above the evaporator fan deck may be removed by two methods a If container is empty open upper rear panel of unit and capacitor may be serviced after disconnecting power plug b If container is full turn unit power OFF and disconnect power plug Remove the 2 evaporator fan
143. and Cooling OFF 1 Continuetoraisetemperature selector setting to 10 0 5 34 1 The compressor and condenser fan will cycle off and the cool TC LED will de energize The heat relay will energize and the TH LED will be illuminated 2 Continue to raise the temperature selector settingto 21 0 5 C 36 1 Thein range light and the IRSLED will de energize heat relay will remain on and the TH LED will be illuminated 4 18 4 26 2 Temperature Control Board Checkout Procedure with TCSM a Equipment Required 1 Multi Test M eter volt ohmmeter 2 Clamp on Ammeter 3 Gauge M anifold 4 Temperature Control Simulator M odule P N 07 00226 NOTE All references to the TCSM board toggle switches TC TH TQ TU DR and in range positions will be either left away from the board or right toward the board Procedure 1 Turn unit OFF and disconnect power supply 2 Open the control box door 3 Remove the temperature control board and insert temperature control simulator module TCSM See Figure 4 22 item 3 for location of temperature control board 4 Place switches on the simulator in the air circulation onlyposition Simulator TCSM switchesTC TH TQ and DR will be to the left Switches TU and in range will be to the left also Placing the in range switch to the left takes the humidistat control out of the system The valve current will be in the OFF position 5 Connect gauge manifold t
144. and providing a sufficient off 2 2 period has elapsed relay TC energizes to restart the compressor Also at this time the condenser fan motor starts and the cool light is illuminated 2 4 2 Controller Set Above 10 C 14 F a Cooling See Figure 2 1 With decreasing supply air temperature and if the supply air is more than 2 3 6 above set point the unit will be cooling with the condenser fan motor compressor motor and evaporator fan motors energized The evaporator fan motors will be high speed as relay TU is energized contactor ES de energizes and contactor EF energizes Also at this time the cool light is illuminated The in range light is de energized W hen the air temperature decreases to 2 3 6 above set point relay IR S energizes and the in range light is illuminated If the air temperature continues to fall modulating coolingstartsat approximately 0 25 C 0 45 above set point The modulating valve will have a variable current up to 1 45 amps at full modulation At this time it is possible for the quench valve to energize before the compressor shuts off as the valve energizes with a minimum amp draw of 0 6 The quench valve will de energize if the amp draw falls below 0 55 amp NOTE Some M odels have a thermostatic expansion quench valve refer to section 5 When the supply air temperature decreases to 0 25 C 0 5 F below set point a timing function commences which delays
145. and with unit in operation turn set pointer downscale to 17 8 C 0 F and note suction pressure Pressure should increase after approximately one minute Slowly raise set point and just before compressor shuts off a significant drop in suction pressure should be noted If no pressure changeis noticed valve or controller malfunctioned b ToReplace Valve l Storethe refrigerant in an evacuated container 2 Remove two bolts from suction service valve 3 Meltsolder at modulating valve connection and rotate valve and tubing enough to clear compressor Remove valve and tubing Replace defective modulating solenoid valve being careful to wrap body of replacement valve with a wet cloth while brazing T he coil need not be removed 4 Install new suction service valve gasket and install bolts in suction service valve Torque to a value of 2 77 to 4 15 mkg 20 to 30 ft lb 5 Solder all connections and leak check same 6 Dehydrate and evacuate the unit per section 4 3 and then add refrigerant charge per section 4 4 2 1 Coil Nut 7 Piston 2 Coil Nut O ring 8 Top Return Spring 3 Coil Housing 9 Valve Body 4 Solenoid Coil 10 Bottom Return Sleeve Spring 5 Solenoid Coil 11 Filter 6 Enclosing Tube Assembly Figure 4 21 M odulating Solenoid Valve NOTE When repairing modulating valve with the enclosing tube kit CTD P N 14 50021 01 be sure not to remove items 7 8 amp 10 See Figure 4 21 Proper alignment o
146. aragraph d d Rezeroingthe Recording Thermometer 1 Be certain that element bulb temperature has stabilized at 0 C 32 F Note the amount of temperature difference between the test meter or thermometer reading and the stylus indicated temperature If the difference noted between the known element temperature and indicated temperature is within acceptable limits 0 3 of 0 C 1 2 of 32 F do not attempt to rezero If more than 0 3 C 1 2 F in variation carefully note the number of degrees 2 If recording thermometer is found to require rezeroing a Loosen set screw item 3 Figure 4 17 and zero thermometer by turning pinion shaft item 4 Lengthening pinion shaft counterclockwise raises stylus indicated temperature reading shortening shaft clockwise lowers stylus reading Then retighten set Screw b Reset control at 0 C 32 start refrigeration unit and repeat accuracy check After temperature stabilization recording thermometer should be within 03 C 12 limits e Replacing Recording Thermometer Element Bulb and Capillary The element is mercury filled and the temperature pressure of the element controls the stylus which moves across the chart in response to temperature changes as sensed by the bulb located in the evaporator supply air The element flange contains three O rings Care should be taken to install the new element flange without damaging the O rings It is possible for a mercury leak to devel
147. asa a su us lig n 4 X E ae 8950 97 ass c a y 5 8 8 DOC LOO e s gt HOO as 5 gt VY lt Figure 5 10 Electrical Wiring Diagram M 69 40 464 8 Units with S N 90105284 thru 90105383 H10 P5 J10 P2 4 F I18 L16 17 J13 KS F11 12 H15 I15 M6 7 M11 E F9 P7 8 67 015 M12 K10 K4 M12 112 F 69 H J10 M13 13 615 H14 J M13 L M10 N16 17 J18 614 H 116 17 LS 16 17 I L10 10 12 15 P17 H12 115 H J4 6 C E16 17 M8 L8 SYMBOL HT 39 HBL HBR HTL HTR IS PH TT EA RI CPI Ws Ui Ec Os On U T r gt 5 RL RS DS TS DS SMV sss SST SSV GEND DESCRI PTION COMPRESSOR CONTACTOR CIRCUIT B CIRCUIT B CAPILLARY CONDENSER CYLINDER COOL LIGH CURRENT L CONDENSER COMPRESSO TEMPERATU DIGITAL D DEFROST H DEFROST H DEFROST H DEFROST H DEFROST 1 DEFROST L DRAIN PAN DEFROST R DEFROST T EVAPORATO EVAPORATO FUSE FULL LOAD HEAT LIGH HIGH PRES HEATER CO HEAT TERM INTERNAL IN RANGE CONTROLLE MANUAL DE REMOTE MO RETURN TE SET TEMP SOLENOID S
148. ates 2000 microns Close the electronic vacuum gauge and vacuum pump valves Shut off the vacuum pump Wait a few minutesto be sure the vacuum holds f Break thevacuum with clean dry refrigerant gas U se refrigerant that the unit calls for aise system pressure to approximately 2 psig by monitoring it with the compound gauge g Remove refrigerant using a refrigerant recovery system h Repeat steps e through g one time i Remove the copper tubing and change the filter drier Evacuate unit to 500 microns Close the electronic vacuum gauge and vacuum pump valves Shut off the vacuum pump Wait five minutesto see if vacuum holds This checks for residual moisture and or leaks j With a vacuum still in the unit the refrigerant charge may be drawn into the system from a refrigerant container on weight scales The correct amount of refrigerant may be added by observingthe scales R efer to section 4 4 44 ADDING OR CHECKING THE REFRIGERANT CHARGE 4 4 1 Checking the Refrigerant Charge NOTE 1 Set the controller set point to 25 13_F to ensure that the modulating solenoid valve is fully open when checking operation of unit 2 Therefrigerant level should only be checked when the unit is running with the modulating solenoid valve fully open The container temperature should be approximately 1 7_C 35 or 17 8 C 0_F a Connect the gauge manifold to the compressor discharge and suction service valves
149. by attaching line to the liquid line valve See Figure 1 3 and refer to section 4 1 b Remove the condenser coil guard c Unsolder discharge line and remove the line to the water cooled condenser if so equipped d Remove coil mounting hardware and then remove the coil e Install replacement coil Solder connections f Leak check the coil per section 4 2 Evacuate the unit per section 4 3 and then charge the unit with refrigerant per section 4 4 1 4 18 CONDENSER FAN AND MOTOR ASSEMBLY WARNING Do not open condenser fan grille before turning power OFF and disconnecting power plug NOTE The replacement motor should be degreased and sprayed with a coat of Tectyl before installing in unit The condenser fan rotates counterclockwise viewed from front of unit and pulls air through the the condenser coil and discharges horizontally through the front of the unit a Open condenser fan screen guard b Loosen square head set screws 2 on fan Thread sealer has been applied to set screws at installation Then disconnect wiring from motor junction box CAUTION Take necessary steps place plywood over coil or use slingon motor to prevent motor from falling into condenser coil c Remove motor mounting hardware and replace the motor It is recommended that new locknuts be used when replacing motor Connect wiring per wiring diagram refer to section 5 d Install fan looselyon motor shaft hub side in
150. cal Wiring Schematic M 69NT40 464 1 Sheet 2 of 2 5 11 M051 5 4A Sheet 1 of 2 5 12 4 132 2 DOOD P64 P131 P133P135 717 MDS 1 00 bigis ii zo ilb l e oa E CN Tol IL TCI LT oN QD J000 00 09 QG GG Or X x wo x Ov l S E x nz e OOO 0 03503 ovAvz 421 AS 7 G9 3 GOGG 2 9 ohh ee P Jo ni 01 21 HL AWS OL 140 ud 7 57405 25 0
151. ce recorder bulb bath 0 0 2 32 0 35 Remove rear upper panel to remove bulb L eave bulb immersed in ice bath for 10 minutes 3 After 10 minutes rotate the chart by hand and check the stylus indicated temperature Do not touch stylus during the checkout procedure 4 f adjustment is required loosen setscrew cross recessed head U sing a 7 mm wrench rotate the adjustment screw clockwise to set the stylus 110 2 C 1 8 to 3 6 F higher than desired temperature 5 Rotate the adjustment screw counterclockwise to set the stylus about 0 5 C 0 9 F higher than set temperature Rotate the chart by hand The indicated temperature should be 0 C 32 F NOTES 1 One full turn with the adjustment screw changes the indicated temperature by approximately 5 C 9 F 2 Overtightening of setscrew may change set temperature 3 Calibration should only be done when bulb temperature is decreasing 4 DO NOT move stylus by hand L 9 10 Voltage Indicator Indicator Test Switch Battery size Alkaline Sensor Assembly Stylus Stylus Lifter Setscrew Adjustment Bulb and Mechanism Bushing and Nut Oe OU Uo PSI ES Figure 4 18 Saginomiya Recording Thermometer c Replacing Sensor Probe 1 Remove boxfrom u
152. ches humidistat optional safety override thermostat optional and the suction solenoid thermostat located on the fan deck model 69NT 40 only The evaporator fans circulate air throughout the container by pulling air in the top of the refrigeration unit and directing the air through the evaporator coil where it is either heated or cooled and then discharged out the bottom of the refrigeration unit into the container The evaporator coil heaters and the thermostatic expansion valve are accessible by removing the front lower access panel The safety override thermostat may be serviced by removing the rear middle panel The defrost termination switch islocated on the far side of the coil and may be serviced by removing the rear middle panel or by removing the front upper access panel and reaching through the left hand evaporator fan venturi AFTER POWER 15 TURNED OFF AND POWER PLUG DISCONNECTED d Control Box Thecontrol box and door include the indicator lights manual switches temperature selector circuit breaker s relays transformers current limiting and control and fuses 6 amp for control and 3 amp for controller See Figure 1 4 or Figure 1 5 Also located above the temperature selector is the defrost interval selector 49 09 UTE
153. crack the suction gauge manifold valve and oil will flow through the suction service valve into the compressor A dd oil as necessary Run unit for 20 minutes in cooling and check oil level c Adding Oil to Service Replacement Compressor NOTE The correct oil charge is 4 0 liters pints 8 5 U 5 Service replacement compressors may or may not be shipped with oil If compressor is without oil A dd oil paragraphs 1 3 b and 4 8 b through the suction service valve flange cavity or by removing the oil fill plug see Figure 4 2 Some compressors have the oil plug located on the crankcase at the right or left side of the oil pump d ToRemoveOil From an 06DR Compressor l Iftheoillevel recorded in step a 3isabove 1 2 of the sight glass oil must be removed from the compressor 2 Close frontseat suction service valve and pump unit down to 0 2 to 0 3 kg cm 2 to 4 psig Frontseat discharge service valve and slowly bleed remaining refrigerant 3 Removetheoil drain plugon the bottom plate of the compressor and drain the proper amount of oil from the compressor to obtain the 1 2 sight glass maximum level Replacethe plug securely back into the compressor DO NOT FORGET TO OPEN SUCTION AND DISCHARGE SERVICE VALVES 4 Repeat Step a to ensure proper oil level 49 CHECKING OR REPLACING MOISTURE LIQUID INDICATOR When the refrigeration system is operating the moisture liquid indicator provides an indication of moisture in th
154. ctrical Wiring Schematic M 69NT40 464 5 Sheet 2 of 2 5 41 H10 P5 J10 P2 4 K16 F 118 L16 17 J13 KS F11 12 H15 115 M6 7 M11 E F9 P7 8 57 015 M12 K10 K4 M12 112 F 6G9 H J10 M13 F13 G15 H14 2 1 1 10 N16 17 J18 SYMBOL C 0 a CB2 DV HT 55 HBL HBR HTL HTR 15 00 TT T lt gt PS RL DS SMV SSS DDE UVT VS WP DESCRIPTION COMPRESSOR CONTACTOR CIRCUIT BREAKER 460V CIRCUIT BREAKER 230V CAPILLARY DE SUPERHE CONDENSER FAN CONTAC CYLINDER HEAD THERMO COOL LIGHT WHITE ENT LIMITING TRA ENSER FAN MOTOR RESSOR MOTOR TEMPERATURE SET STAT DIGITAL DISPLAY DEFROS EATER BOT DEFROS EATER BOT DEFROS EATER TOP EFROS EATER TOP 2 P U D H H H H ATER VALVE R22 OPTION TOR STAT R22 OPTION NSFORMER ON TOM LEFT TOM RIGHT LEFT RIGHT EFROST INTERVAL SEL ECTOR EFROST LIGHT CAMBER RAIN PAN HEATER EFROST RELAY 2 EFROST TERMINATION EVAPORATOR FAN CONTA EVAPORATOR FAN MOTOR FUSE FULL LOAD AMPS HEAT LIGHT CAMBER HIGH PRESSURE SWITCH H H EATER CONTACTOR EAT TERMINATION THE INTERNAL PROTECTOR IN RANGE LIGHT CGREE CONTROLLER RELAY C
155. d continuity light will be illuminated if switch closed after removing compressor pressure c Connect capillary a cylinder of dry nitrogen See Figure 4 14 4 9 d Set nitrogen pressure regulator at 21kg cm a 300 psig with bleed off valve closed e Close valve on cylinder and open bleed off valve f Open cylinder valve Slowly close bleed off valve to increase pressure on switch The switch will open at a static pressure up to 21 295 psig If light is used light will go out and if ohmmeter is used the meter will indicate open g Slowlyopen bleed off valve to decrease the pressure The switch will close at 13 kg cm 190 psig 412 SERVICING QUENCH SOLENOID VALVE QV NOTE Some models have a thermostatic expansion quench valve refer to section 5 so servicing quench valve isNOT APPLICABLE a Checkout Procedure Itisimportant to verify for 0 C 32 simulated temperature only that quench function occurs before modulation valve SMV closure occurs and compressor subsequently shuts off One of two ways of checking the above is by feeling for a large drop in temperature of the quench line 1 4 inch tube from solenoid valve QV when the TQ light emitting diode LED energizes on the controller main board A slight increase in suction pressure will be noticed when the quench function occurs The other method of checking operation of the valve is 1 Placethe Start Stop switch in the OF
156. d Circuit 1 12 1 14 Suction Solenoid Valve M 69 40 1 12 1 15 Frost Formation On Compressors 1 12 1 16 Controller sca eee e RS a eel beak BER ERU EUR 1 12 2 OPERATION 2 1 2 1 Inspection Before Starting 2 1 2 2 Starting And Stopping Instructions 2 1 2 3 After Starting Inspection 2 2 2 4 i ov ctr tani Reemi oder De ea 2 2 2 4 1 Cooling Controller Set Below 10 C 14 F 2 2 2 4 2 Controller Set Above 10 C 14 F 2 2 2 4 3 Defrost oeil uc Eee tect Siege 2 5 3 TROUBLESHOOTING 3 1 3 1 Unit Will Not Start Or Starts Then Stops 3 1 3 2 Unit Runs But Has Insufficient Cooling 3 1 3 3 Unit Operates Long Or Continuously In Cooling 3 1 3 4 Unit Will Not Heat Or H as Insufficient Heating 3 2 3 5 Unit Will Not Terminate 3 2 3 6 Unit Will Not Defrost Properly 3 2 3 7 Abnormal Pressures Cooling
157. d into receptacle provided on the controller and other end in the meter Always check resistance thermometer before using refer to paragraph b 2 Ohmmeter a Place one probe of ohmmeter in the middle of the receptacle provided on the chart platen and ground other probe to unit b Note reading of meter and using Table 4 1 convert resistance to temperature 1 Wind up Key 4 Pinion Shaft 2 Stylus 5 Stylus Lifter 3 SetScrew Figure 4 17 Partlow Recording Thermometer b CheckingResistance Thermometer Calibrate the resistance thermometer by completely filling a thermos container full of ice cubes or chips and fillingthe voids between the ice with plain water Stir the solution until the mixture registers 0 to 0 3 32 to 32 5 F as indicated by a laboratory thermometer Immerse the resistance thermometer in the 0 C 32 F solution and check its accuracy at this temperature With 4 12 thisinstrument be certain that the recommended length of the check probe is immersed so that it accurately will reflect temperature Bear in mind that this measurement checks the test probe at 0_C 32 only itis possible for this type of instrument to be inaccurate at other temperatures Rezero check thermometer if necessary by manufacturer s instructions c Checking the Recording Thermometer Bulb Temperature Checkin
158. dc Ir To qp E SIE CF 3 2 3 2 5 3 2 5 C 5r MT gt 52 a E Ik af gus 59506 o95252 op A EMG XY Q a 11 VSV2 EF21 2 DHBL TRH1 CPAS 12 c11 eri 2 c22 t7 t 0791791010 QOO COGO COGO CORO FOR COLO COLO C T P XKX XS H D B VS 3 3 2 2 3 f2 3 2 3 2 3 C2 t 3 C2 3 2 3 2 3 2 OBO 3 9 vsP4 EMT3 CF21 HR22 2 cag E EF23 EMTS CMT2 HR23 TRH3 cB22 N TRX2 d G CO SEP 22 21 T l SA4VSJ2 812 Y i Dee T MN ep T d 52 03 999 VSH2 OSRE 21 11 UG ss 504 502 CM VSN1 m 1 rs a on n 9 DOE 2 22 63 o 21 X SPARE hee OLE VSA3 vsc3 VSA2 vsc2 vsB2 511 NOES S GRD CPB We yey Grea gE 85 BP Sapa BA GS a 2 cz2 4 be TEE EET BK W o z n gt 1 BK W R TBS CFs x 9 5 ir 45 LI s 1 x rid 5 as 450 3 230 3 60 PLATE 9 35 1467 ARTWORK 6SNT3S 9164 REV E Figure 5 20 Ele
159. de energizing of relay TC resulting in de energizing the compressor and condenser fan motor Also the cool light is de energized The evaporator fan motors continue to run to circulate air throughout the container The in range light remains illuminated as long as the return air is within 2 C 3 6 F of set point If the unit is in the holding mode neither heating or cooling and the supply air temperature increases to 0 25 C 0 5 F above set point and providing a sufficient off time has elapsed relay TC energizes to restart the compressor Also at this time the condenser fan motor starts and the cool light is illuminated When the supply air temperature increases 2 C 3 6 F above set point relay IRS and the in range light is off The cool light remains energized TO CONTROL TRANSFORMER TH 1 lamp 185 DR TH TC TG TU Pg 10 11 13 Energized Circuit De energized Circuit Figure 2 1 Cooling Within 2 C 3 6 F of Set Point 2 3 TO CONTROL TRANSFORMER F 6 AMP IP EM P1 P2 P2 5
160. e _ L1 7 wo lt gt lt gt 1666 2555 T 9 1 t T gO 2 a Ness a a in m 7 L 9555 9 Lo G gg TE oo 8 B 1596 6 9 4 0 244 N x S re a E4d o 5 1 J 5 4 a s A 94d in 8 8 44d amp 717 NDS e ST e gt Sl REV ARTWORK 69 35 8254 ___ 8 IDHTR DPH HR23 281 281 38 48 981 e 18 92544 Pas mz 281 une CMG QOD 2224 29334 21423 612 21434 2124 c 133 1194 LIHA Th4 EZI PQQ m zou 29497 149 LYH 11424 999 OOOO 99999 99999 90999 5 2 1 2 13 ARTWORK 69NT35 8264 REV 69NT35 9783 900090 OODODO 1 010 aCe 9 9 42 3 2 56
161. e 4 6 Sensor D C Voltages 28 9 14 27 8 16 26 7 18 25 6 20 24 4 22 23 3 24 22 2 26 211 28 2 2 20 0 30 11 18 9 32 0 17 8 34 11 16 7 36 2 2 15 6 38 3 3 14 4 40 4 4 13 3 42 5 5 12 2 44 6 7 111 46 10 0 8 9 7 8 6 7 5 5 4 4 3 3 TEMPERATURE e D C vos F lt vos 3 45 48 8 9 5 32 3 56 5 45 3 68 5 55 3 79 5 67 3 90 5 78 4 00 5 88 4 10 5 98 4 22 6 10 4 32 6 20 4 45 6 32 4 55 6 42 4 68 6 55 4 78 6 65 4 88 6 77 5 00 6 88 5 10 6 98 5 22 Table 4 7 Temperature Pressure Chart R 12 BOLD FIGURES Inches M ercury Vacuum cm Hg Vac LIGHT FIGURES psig kg cm TEMPERATURE PRESSURE ce iT 40 2 26 9 1 89 35 1 28 5 2 00 30 34 0 30 1 2 12 28 33 1 31 7 2 23 26 32 2 33 4 2 35 24 31 3 35 2 2 47 22 30 4 37 0 2 60 20 29 7 41 7 2 93 18 28 10 46 7 3 28 16 27 13 52 0 3 66 14 26 16 57 7 4 06 12 24 18 63 8 4 49 10 23 21 70 2 4 94 8 22 24 77 0 5 41 6 21 27 84 2 5 92 4 20 29 91 8 6 45 2 19 32 99 8 7 02 0 18 35 1082 7 61 2 17 38 117 2 8 24 4 16 41 126 6 8 90 6 14 43 1364 9 59 8 13 46 1468 1032 10 12 49 1576 11 08 12 11 52 1691 1189 14 10 54 1810 1273 16 9 57 1935 13 60 18 8 60 2066 14 53 20 7 63 2203 15 49 22 6 66 2346 16 49 24 4 68 2495 17 54 26 3 71 265 1 18 64 4 26 SECTION 5 ELECTRICAL WIRING SCHEMATIC AND DIAGRAMS 5 1 INTRODUCTION Thi
162. e isapproximately 5096 closed approximately 0 6 amps output to the suction modulation valve coil from the temperature controller the temperature controller will energize the quench solenoid valve W hen the quench valveisopened a small amount of liquid refrigerant is metered through an orifice which acts as an expansion device into the suction line down stream of the suction modulation valve Because of low compressor suction pressures created by the suction modulation valve the liquid fed by the quench valve flashes to a low temperature gas and therefore the compressor may form frost or ice on the end bell and top of the motor cavity adjacent to the suction gas path of flow This is not harmful to the compressor as the restrictor in the quench valve line prevents excessive liquid from flowing into the compressor UB Y Figure A Controller Set Above 10 C 14 JD Y 182200 Figure Controller Set Below 10 14 Figure 1 7 Frost Pattern on Compressors With the controller set below 10 C 14 F the allowable compressor frost pattern limit is shown in Figure 1 7B The frost line will not normally extend beyond the suction service valve as the quench valve should not energize when operating with the controller set point below 10 C 14 F f excessive frost is noticed o
163. e maintaining continuous compressor operation and holding the temperature very close to set point This variable cooling capacity is achieved by a modulating solenoid valve which provides a variable restriction in the compressor suction line This valve varies the flow rate of the refrigerant pumped by the compressor For low cooling capacity operation requiring higher than 0 62 amp modulating valve current the two way quench solenoid valve is energized opened which allows a small metered flow of liquid refrigerant to enter the suction line and provide supplemental compressor motor cooling For very small cooling requirements that are less than the minimum refrigeration capacity of the unit fully closed modulating valve the controller will cycle compressor on and off to match the load De energization of relay TC to stop the compressor is delayed to prevent nuisance cycling from brief low temperature swings Once off the compressor will not restart for 5 to 6 minutes Refer to paragraph cold ambients when container heating isrequired the sensed temperature will drop to 1 0 C 1 8 F below set point and the controller will cycle electric resistance heating with a transient masking delay on energization similar to that associated with compressor cycling The heat relay contactor H isenergized through the closed contacts N C of relay TC by controller relay TH energizing and closing the TH contacts N O Heat relay
164. e system Theindicator element is highly sensitive to moisture and will gradually change color in direct relation to an increase or decrease in the moisture content of the system T he safe caution and unsafe system operating conditions are then easily determined by matching the element color with the colors displayed on the reference label To change indicator or lens a Pump down the unit per section 4 1 and install new indicator or lens b Evacuate the unit per section 4 3 and add refrigerant charge per section 4 4 c Startunit and after twelve hours re check indicator If indicator does not indicate a safe condition pump unit down and change filter drier Refer to section 4 10 410 CHECKING OR REPLACING THE FILTER DRIER If the sight glass appears to be flashing or bubbles are constantly moving through the sight glass the unit may have a low refrigerant charge or the filter drier could be partially plugged To Check Filter D rier a test for restricted or plugged filter drier is by feeling the liquid line inlet and outlet connections of the drier cartridge If the outlet side feels cooler than the inlet side then the filter drier should be changed b Another test is that the moisture liquid indicator shows moisture in the system refer to section 4 9 To Replace Filter D rier a Remove the refrigerant refer to section 4 1 b Remove filter drier clamp then replace drier c Evacuate the unit
165. e1 8 5 D 7 SPARE T T T OLE Io VSA3 VSA2 vsc2 1 Toma GRD CPB fal 5 VY gets mo Nua ML Gayo BE re BB 548655 eee ee Hd up eet ue 5 gt PNE BK W R TBS e 1e3 Ed gt 15 751 RI 52 T3 460 3 60 230 3 PLATE BSNT35 1217 ARTWORK BSNT35 8904 REV gt Figure 5 12 Electrical Wiring Diagram M 69NT40 464 8 Units starting with S N 90105384 Sheet 2 of 2 5 25 LINE SYMBOL 02 L8 C E3 CB1 D2 CB2 LS CDV N5 L7 Kg CHT Lg CL D11 CLS P1 CLT 95 CM a2 cP 12 114 J18 css 620 DHBL a4 DHBR N4 DHML DHMR P3 DHTL a3 DHTR K19 DIS J13 DL 04 DPH D12 14 617 DR H16 DTT N6 L14 115 EF 07 98 06 14 115 FB F17 B18 F FLA K11 HL J9 HPS N3 M12 HR J12 HTT I9 IP TRANS AUTO L11 IRL G11 F17 L20 IRS J10 D12 KR G16 MDS 15 20 R K9 K10 L9 L10 RM 018 19 RTS J20 SDS G16 SMV DS SOT N18 SPS G J19 555 SST L8 SSV 67 ST M N20 STS C P17 T c15 69 H9 J9 K9 L7 E9 J17 TC F14 TD 1 20 TDS 12 TDT 612 117 K17 Ta 15 TR D F19 TSS D10 G14 15 L17 TU L7 UV 2 4 vs WP Figure 5 13 Electrical Wiring Schematic M odel 69NT40 464 3 Sheet 1 of 2 DESCRIPTION
166. eck the compressor Serial M Number plate for CFM displacement refer to Table 1 2 2 Theservice replacement compressor is sold without shutoff valves but with valve pads and without terminal box and cover Customer should retain the original terminal box cover and high pressure switch for use on replacement compressor 3 Check level in service replacement compressor If none add 4 0 liters 8 5 5 pints Refer to paragraph 1 3 0 and section 4 8 4 A terminal block kit must be ordered as a separate item when ordering replacement compressor A ppropriate installation instructions are included with kit 5 Refer to Table4 4 and Table4 5 for applicable compressor wear limits and torque values a unit b If compressor is inoperative and unit still has refrigerant pressure remove refrigerant refer to section 4 1 c Disconnect wiring in the compressor junction box after identifying same Disconnect wiring from compressor terminals and remove compressor junction box d Remove bolts from service valve flanges e Remove compressor plate mounting bolts f Remove compressor and mounting plate The compressor weighs approximately 118 kg 260 pounds g Remove high pressure switch HPS from compressor and check operation of switch section 4 11 2 h Remove compressor mounting bolts from mounting plate and install mounting plate on replacement compressor i Install replacement terminal block ki
167. eet metal which almost encircles the periphery of the rings will facilitate removal Each piston pin is locked in place by lock rings which are snapped into grooves in the piston wall 1 Capscrew 6 Connecting Rod 2 7 Compression Ring 3 Crankshaft 8 Piston 4 Thrust Washer 9 Pin 5 Rotor Drive Key 10 Retainer Figure 4 9 Crankshaft Assembly k Since the stator is not replaced in the field the terminal plate assembly need not be disturbed unless a leak exists or a terminal part requires replacing Disassemble and assemble the terminal plate as shown in Figure 4 11 1 Equalizer Tube and Lockscrew Assembly 2 Lockwasher 3 Counterweight Motor End Figure 4 10 Removing E qualizing Tube and L ock Screw Assembly The terminal mounting plate assembly as originally installed is assembled so asto leave a small space between the outer terminal bushing and the surface of the mounting plate This is to provide further crush of the 4 6 terminal bushingin case aleak should occur To stop leak tighten the terminal bushing nut only enough to stop the escape of gas Do not tighten until terminal bushing is flush with the mounting plate The tightening torque used at the factory is 0 21 to 0 23 mkg 18 to 20 inch pounds maximumto prevent damage to the plastic parts NOTE Parts shown are for one terminal Terminal Bushing Nut Lock Washer Terminal Washer Outer Terminal Bushing O Ring Terminal Bushin
168. energize after 90 minutestime delay and will remain de energized until the supply air increasesto 2 C 3 6 F below set point 2 4 W hen the temperature rises to 0 5 0 9 below set point TH opens heating off and the system again enters the holding zone The compressor and condenser fan motor not running ascontactorsC and CF remain de energized The evaporator fans continue to run in high speed to circulate air throughout the container A safety heater termination thermostat HTT attached to an evaporator coil support set to open at 54 5 C 130 F will open the heating circuit if overheating occurs 2 43 Defrost See Figure 2 3 Refer to paragraph 1 16 f for description of the defrost interval selector and automatic defrost initiation When the defrost mode is initiated the controller relay contacts T11 to T 10 close to supply power to the heat relay and in turn energizes the defrost heaters Also at the same time the defrost relay contacts T19 to T20 close to illuminate the defrost light Energizing the defrost relay also opens the normally closed contacts T 19 to T18 to stop the evaporator fan motors TC T9to T 31 opens to de energize the compressor contactor cool light and the condenser fan motor contactor The in range light remains illuminated during defrost Refer to paragraph 1 16 g When the coil temperature reaches 24 C 75 F defrost termination thermostat opens to interrupt
169. et too low unit pulldown capacity may be reduced due to limitation of compressor amperage as determined by the timing and current control board 2 Table 1 4 shows the approximate total unit amps for each position of the current limit control Temperature Control Capacity Control The temperature control portion of the controller consists of a temperature set point potentiometer CSS return air RTS and supply air STS temperature sensors two thermistor probes solid state circuitry temperature control timing and current control power supply and IRS printed circuit boards and associated control relays Each temperature sensor is located in its respective air stream Operation at any desired temperature within the set point range 25 C to 25 C or 15 to 80 F is achieved by turning the set point potentiometer knob to position the pointer at the desired temperature A changein sensed air temperature supply or return air depending on set point causes a corresponding change in electrical resistance of the thermistor sensor T his change is processed by the electronic circuitry of the controller which actuates control relays and the refrigerant suction modulating valve in accordance with the controller operating diagrams as shown in NO TAG and NO TAG For set points above 10 C 14 relay TU will be energized along with contactor EF The two speed evaporator motors will be in high speed Also for set p
170. f not available a propane torch will work caution should 4 20 be taken not to burn the heat shrink tubing or wire insulation M ake sure all seams are sealed tightly against the wiring to prevent moisture seepage k Slide large heat shrink tubing over both splices and shrink tubing and heat as in step j Secure sensor to unit and check sensor resistance as detailed in section 4 26 6 SENSOR 41mm 1 5 8 inch 6 35mm 1 4 inch E Figure 4 24 Sensor SENSOR SHOULDER HEAT SHRINK TUBING 2 LARGE HEAT SHRINK TUBING 1 Figure 4 25 Sensor and Cable Assembly 4 27 THERMOSTATIC EXPANSION VALVE The thermal expansion valve is an automatic device which maintains constant superheat of the refrigerant gas leaving the evaporator regardless of suction pressure The valve functions are a automatic response of refrigerant flow to match the evaporator load and b prevention of liquid refrigerant entering the compressor U nless the valve is defective it seldom requires any maintenance a Removing Expansion Valve 1 Store the refrigerant an evacuated container by attaching a hose to the liquid line valve 2 Remove insulation Presstite from expansion valve bulb and power assembly and then remove thermal bulb from the suction line 3 Loosen flare nut and disconnect equalizing line from expansion valve 4 Remove capscrews and lift off power assembly and remove cage assembly C heck for fo
171. f these items is achieved only at the factory Coil Checkout Procedure WARNING M ake sure power to unit is OFF and power plug disconnected before replacing the coil 1 Disconnect the modulation valve coil wires from their terminal locations T14 amp T15 on the units main control board refer to section 5 2 Using a reliable digital ohmmeter test each lead s resistance to ground If the resistance indicates ground short is present inspect the length of wiring for damaged or exposed wires Replace where necessary 3 Setting the digital ohmmeter for low range check coil s resistance If coil sresistance isbelow 5 ohms it is recommended to be replaced New coils have an approximate resistance of 7 6ohmsat25 77 F The chart below gives the resistance of a new coil at various ambient temperatures Ambient Temperature Cold Coil 10 F 6 45 ohms 40 F 6 90 ohms 70 F 7 40 ohms 100 F 7 90 ohms NOTE A cold coil isa coil which had not been operating and is assumed to be at ambient temperature H ot coil temperatures taken after the unit has been operating in deep modulation for a long period of time may give higher resistance readings 4 Reconnect the modulation valve coil wires to their correct terminal locations d Replacingthe Coil Remove coil nut and remove coil after disconnecting wiring When replacing nut torque to a value of 0 41 3 ft Ib 426 CONTROLLER CHECKOUT PROCEDURE NOTE If the u
172. g Washers Grey Terminal Bushing Washers Red Inner Terminal Bushing Terminal Mounting Plate Cover Gasket 11 Inner Terminal Block 12 Terminal Screw Figure 4 11 Terminal M ounting Assembly 4 7 COMPRESSOR REASSEMBLY To clean compressor parts use a suitable solvent with proper precautions Coat all moving parts with compressor oil before assembly Refer to Table 4 5 for applicable compressor torque values 999 rov sco xr 10 Suction and Discharge Valves If the valve seats look damaged or worn replace valve plate assembly A ways use new valves because it is difficultto reinstall used discharge valves so that they will seat as before removal A ny valve wear will cause leakage for this reason Suction valves are positioned by dowel pins see Figure 4 12 and will assume their original position when reinstalled No two valves are likely to wear exactly the same N ever interchange used valves Do not omit the suction valve positioning springs See Figure 4 12 Place the springs so that the ends bear against the cylinder deck middle bowed away from cylinder deck U se new gaskets when reinstalling valve plates and cylinder heads 1 Suction Valve Positioning Spring 2 Suction Valve 3 Valve Plate Dowel Pin Figure 4 12 Suction Valve and Positioning Springs b Compression Rings 1 Depending on date of manufacture the compressor may be equipped with double or single ring pistons This variation
173. g temperature is accomplished comparing the instrument s indicated temperature stylus with the known temperature existing at the element sensing bulb To properly check the temperature of the recorder the element sensing bulb should be stabilized at a temperature of 0 32 This is accomplished by using one of the two following methods whichever is more convenient 1 Unit Running Place set point at 0_ 32_F After unit has pulled down to this temperature allow compressor to cycle ON OFF 3 to 5 times to be certain temperature has stabilized at 0 C 32 as verified by the resistance thermometer If the temperature indicated by the thermometer differs from 0 32 by more than 0 6_C 1_F when compressor cycles off rezeroing must be performed 2 Unit Off Place the recording thermometer element sensing bulb in 0 32 ice water bath Ice water bath is prepared by filling an insulated container of sufficient size to completely immerse bulb with ice cubes chipped ice then filling voids between ice with water and agitating until mixture reaches 0 C 32 asshown laboratory thermometer When the temperature at the element sensing bulb has stabilized at 0_C 32 asindicated by stable stylus indication compare temperature indicated by stylus with temperature shown by a laboratory thermometer If the two readings do not agree the recording thermometer should be rezeroed Refer to p
174. gt o T e e a a 9 4 gt x a tere AY Gn 3A j MDS Qon ARTWORK BENT35 8154 REV HR22 DUE DER 1 1 1 Gye l Ea oe lt 21 HR21 E EE Soc 7 4 12 vsv4 4 G3 vsv1 VSJ4 1 HR23 DHTR 2 4 EMI 14 lt 2 55 gus EF23 Ln EF22 rs TS rice 2 EMG 9 2 EMG 2 Y RTS GRD Y 515 4 S Cu NY 6 gt a x NN MONN N MN m la gt N OO Fe N M ON lt 0 0 lt QV cu amp 6 oru HOD Do We E GR CH E UE
175. icas v Q Q 8 8 5 15654 2555 8 4 e e ecc 8 eee 9 E 8 1 555 2 9 y x ao rs a 9 SD BB 7 e TRAR 4 4 a NON ee 8 7 44 E n E a EZd T EM sd 3 5 94d 8 5 a L 444 to 717 NDS ST gt Sl Rev Figure 5 10 Electrical Wiring Diagram M 69 40 464 8 Units with S N 90105284 thru 90105383 ARTWORK 69 35 8664 ARTWORK 69NT35 8674 REV E 69NT35 1077 Sheet 2 of 2 5 21 281 Nua 481 zou o D 981 en8 ap CAS
176. inch flare cap d Connect charging line between suction service valve port and drum of Refrigerant 12 Open VAPOR valve drum Purge charging line e Partially frontseat turn clockwise the suction service valve and slowly add charge until the refrigerant appears at the proper level refer to section 4 4 1 45 REPLACING THE COMPRESSOR See Figure 4 2 WARNING M ake sure power to the unit is OFF and power plug disconnected before compressor replacing the 7 TN Discharge Valve Flange High Pressure Switch Connection Low Pressure Connection Suction Valve Flange Motor End Cover Serial Model No Plate Sight Glass Bottom Plate Oil Drain Plug Bearing Head Oil Pump See Figure 4 3 Oil Fill Plug Refer to paragraph 4 8 c Cylinder Head Valve Plate Figure 4 2 Compressor 06DR OU RUNE 14 GEAR PUMP Figure 4 3 Oil Pump There are two types of oil pumps vane and gear Force feed lubrication of the compressor isaccomplished by a oil pump driven directly from the compressor crankshaft Refrigeration oil is drawn from the compressor crankcase through the oil filter screen and pick up tube to the oil pump located in the bearing head assembly T he crankshaft is drilled to enable the pump to supply oil to the main bearings connecting rod bearings and the shaft seal 4 3 NOTES 1 Ch
177. ing power OFF and disconnecting power plug Table 1 1 M odel Chart REFRIGER UNIT WEIGHT ANT MODELS 12 69NT20 284 1330 620 69 20 2841 1170 531 90 41 69NT20 284 2 11600 526 90 441 69NT20 284 3 1285 583 123 56 69NT40 461 1260 571 123 56 69NT40 461 8 1260 5727 123 56 69NT40 464 1200 545 88 40 69NT40 464 1 1210 560 88 40 69NT40 464 2 1200 545 88 40 69NT40 464 3 1470 667 120 44 69NT40 464 4 1250 567 88 39 69NT40 464 5 1230 558 88 40 69NT40 464 7 1260 572 123 5 58 69NT40 464 8 1200 545 88 40 69NT40 464 9 1240 562 88 40 69NT40 464 10 1230 558 123 5 6 69NT40 464 12 1200 545 88 4 0 69NT40 464 15 1230 558 88 4 0 ua e a o e z 55 25 x 2 29 5 5 588 32 8 28 327 55 5 56 S 258 55 25 ao X X X z C X X X E x X 2 X 25 iX E X S xX X C X xd X C s X 25 A EE X Provision for water cooled condenser If water cooled condenser is added refrigerant charge will change B Provision for step up power transformer C Provision for heat exchanger X Designates item provided 1 1 12 GENERAL DESCRIPTION a Compressor Section NOTE Check the compressor Serial M Number plate for CFM displacement refer to Table 1 2 The c
178. ized With set points below 10 C 14 F the evaporator fan motors will be in low speed as relay TU is de energized contactor ES energizes If the container return airiswithin 2 C 3 6 F of set point the in range relay contacts IRS are closed and the in range light IRL isilluminated When the return air temperature decreases to 0 25 C 0 5 F below set point a timing function commences which delays de energizing of relay TC and resulting in de energizing the compressor and condenser fan motor Also the cool light is de energized The evaporator fan motors continue to run to circulate air throughout the container NOTES 1 When the return air temperature decreases to 12 2 C 10_F on the 69NT 40 units the suction solenoid thermostat closes to energize the suction solenoid valve The valve opens to increase the refrigerant flow rate and cooling capacity 2 Inthe frozen range the suction modulation islimited to approximately 0 4 amp or valve is 25 percent closed 3 The quench valve will not be energized at thistime asthe suction modulation valve current will not reach 0 6 amp necessary to energize quench valve 4 Somemodelshave athermostaticexpansion quench valve refer to section 5 5 Settingthe controller below 10 C 14 F on units with two speed motors will place the motors in low speed contactor ES energizes When the return air temperature increases to 0 25 C 0 5 F above set point
179. ized Energized De energized Neo hay tee De energized at set points below 10 C 14 F gt Two Speed Evaporator x Motor Relay ES Energized at set points below 10 C 14 FJ De energized Defrost Relay DR De energized De energized Energized Heater Relay HR De energized De energized Energized Quench Solenoid QV Refer to De energized De energized paragraph 1 16 c CONTROLLER RELAYS DR Defrost OFF OFF ON IRS In R ange Closed If supply air is within 2 C 3 6 of set point Cooling ON OFF TH Heating OFF OFF XX XX ON TQ Quench Refer to N A TU Utility paragraph 1 16 c Two Speed M otors Energized with controller settings below 10_C 14 F INDICATING LIGHTS Cool ON OFF Defrost OFF OFF ON In Range On If supply air is within 2 C 3 5 F of set point gt Heat OFF OFF ae ON POWER CIRCUIT Compressor Energized De energized ii hs De energized Condenser Fan M otor Energized De energized re De energized Heaters De energized De energized Js Energized Evaporator Fan M otors Energized Energized s yis De energized Dehumidification and heating modes do not operate at set points below 10 C 14 F N A Not Applicable 2 7 INDICATION TROUBLE SECTION 3 TROUBLESHOOTING POSSIBLE CAUSES 31 UNIT WILL NOT START OR STARTS THEN STOPS No power to unit Loss of control power
180. justment is required adjustment to read 20 4 F 6 Release calibration button Push calibration button and hold in After approximately 20 seconds recorder should read 20 C 68 F 7 lfadjustmentisrequired rotate zero adjustment to read 20 C 68 F 8 Release calibration button 9 Push calibration button and release Recorder will read actual box temperature 10 Repeat above steps to check calibration 422 RUST PREVENTION AND MAINTENANCE OF PAINTED SURFACES Rust Prevention Components To prevent corrosion external parts such as compressor cable clamps fasteners and evaporator fan motor should be sprayed with clear urethane CRC Chemicals Part N o 2 53 every six months T he inside of the control panel should be sprayed CRC Chemicals Part No 3 36 at similar time periods b Maintenance of Painted Surfaces Therefrigeration unit is protected by a special paint system against the corrosive atmosphere in which it normally operates H owever should the paint system be damaged the base metal can corrode n order to protect the refrigeration unit from the highly corrosive sea atmosphere or if the protective paint system is scratched or damaged clean area to bare metal using a wire brush emery paper equivalent cleaning method Immediately following cleaning spray or brush on zinc rich primer A fter the primer has dried spray or brush on finish coat of paint to match original unit color 4 2
181. milar cleaner following manufacturer s instructions The two drain pan hoses connected to the drain are routed behind the condenser fan motor and compressor T hedrain pan line s must beopen to ensure adequate drainage To Replace the E vaporator Coil a Store the refrigerant charge in an evacuated container by attaching line to the liquid line valve See Figure 1 3 and refer to section 4 1 b With power OFF and power plug removed remove the screws securing the panel covering the evaporator section upper panel Disconnect the defrost heater wiring d Disconnect the klixon from the coil The defrost termination thermostat DTT is located on the middle coil support as shown in Figure 1 2 e Remove middle coil support f Remove the mounting hardware from the coil g Unsolder the two coil connections one at the distributor and the other at the coil header NOTE It may be necessary to raise the fan deck to break the solder connections to raise coil h After defective coil is removed from unit remove defrost heaters and install on replacement coil i Install coil assembly by reversing above steps j Leak check connections per section 4 2 vacuate the unit per section 4 3 and add refrigerant charge per section 4 4 2 414 REPLACING THE EVAPORATOR FAN AND MOTOR ASSEMBLY The evaporator fans circulate air throughout the container by pulling air in the top of the unit The air is discharged
182. n position causes the temperature to be displayed in degrees fahrenheit _F 1 10 switch in the up position With perishable cargo set points above 10 14 F the digital temperature display and recording thermometer may not agree as the recorder bulb is sensing the return air temperature and the digital temperature display will indicate supply air temperature With a frozen load set pointsbelow 10 C 14 F the recording thermometer and the digital temperature both indicate return air temperature and should be in close agreement 110 SAFETY AND PROTECTIVE DEVICES System components are protected from damage by safety and protective devices listed in Table 1 3 These devices monitor the system operating conditions and open aset of electrical contacts when an unsafe condition occurs Open safety switch contacts of one or more of the following devices IP CP HPS or IP Trans Auto will shut down the compressor T he condenser fan motor will stop if contacts IP CM IP CP or IP Trans Auto open The entire refrigeration system will shut down if one of the following safety devices open a Circuit Breaker s or b Fuse 6A or c Evaporator Fan M otor Internal Protector s IP EM 111 REFRIGERATION CIRCUIT Starting at the compressor see Figure 1 6 the suction gas is compressed to a higher temperature and pressure
183. n the compressor and the suction modulation system is operating normally then the thermal expansion valve superheat setting should be checked Flooding by a thermal expansion valve may cause oil to foam excessively N ormal quench valve operation will not foam the oil significantly after operation has stabilized Adhesive backed labels depicting allowable frost patterns on compressors are available from Carrier Transicold R eplacement Component G roup 1 16 CONTROLLER h General Description See Figure 1 4 or Figure 1 5 The Carrier Transicold controller is a modular assembly of solid state electronic circuitsthat combines a number of refrigeration system control functions in a single unit The functions 1 temperature control 2 current control 3 temperature control function time delays 4 selectable time interval defrost and 5 out of range indication time delay The controller consists of a programmed main circuit board three plug in control circuit boards five or six plug in relays and remote located components which are 1 temperature set point potentiometer 2 two temperature sensing probes 3 two switches for checking calibration and 4 current limiting transformer The controller has high precision components in critical circuits which result in the elimination of calibration adjustments As long as component replacements are made using factory specified parts calibration will be maintained
184. nch Relay TQ Light Emitting Diode LED Cooling Relay TC Light Emitting Diode LED Heating Relay HR Light Emitting Diode HR LED Defrost Relay DR Light Emitting Diode DR LED In Range Relay Light Emitting Diode IRS LED Figure 4 22 Unit Control Board 4 26 5 Temperature Set Station Checkout Procedure NOTE The temperature set station CSS issometimes referred to as the temperature selector potentiometer 16 15 PRP RP If problem with the selector is suspected all three wires must be checked The selector should be checked for resistance using a reliable ohmmeter at the temperature selector connection as shown in Table 4 2 a With multi test meter set on ohms 1K b Place one probe on selector connection pin 1 and other probe on pin 2 see Figure 4 23 Ohms will be 324 to 334 Complete checkout procedure by using Table 4 2 LOCATING PIN Figure 4 23 Temperature Set Station and Plug 4 26 6 Temperature Controller Sensor C heckout Procedure D ue to variations and inaccuracies in thermometers or other test equipment a reading close to the chart value would indicate a good sensor If a sensor is bad the resistance reading will usually be much higher or lower than the resistance values given in Table 4 6 a Turn unit OFF and disconnect power supply b Remove temperature control
185. nit 2 Remove nut and bushing item 9 Figure 4 18 3 Install replacement probe and bushing Seal with silicone before securing to case 4 Install box into unit 4 21 RECORDING THERMOMETER FUJI KIKI 1 2 3 4 5 11 LA N PUSH RECORD ALARM SUP ADS CALIBRATION REMAINING VON PUSH DAY TIME uns 10 9 8 FUSE 2 Setscrew Adjustment Calibration Button Sensor Supply Recording LED Sensor Return Recording LED Sensor Alarm LED Chart Nut Battery C size Alkaline Located behind plate Stylus Stylus Lifter Voltage Indicator Indicator Test Button SNOUBWNE 8 9 0 1 Figure 4 19 Fuji Kiki Recording Thermometer NOTE Do not overtighten chart nut after replacing chart a Battery 1 Push voltage indicator test button item 11 Figure 4 19 Replace battery if voltage indicator pointsto the red or silver zone b Calibration 1 Install new chart on platen 2 Push calibration button item 2 and hold in After approximately 20 seconds recorder should read 32_F 3 Ifadjustmentis required rotate zero adjustment to read 0 32 4 14 4 Release calibration button Push calibration button and hold in After approximately 20 seconds recorder should read 20 C 4 5 If ad
186. nit isequipped with a D igital Display service accessory Digital Display is available thisshould be used for readingset point settings 4 26 1 Controller PreTrip Equipment Required 1 Volt ohmmeter capable of accurately reading 0 to 2 vdc 2 Simpson temperature meter sensor and lead and gauge manifold b Preparation 1 Set volt ohmmeter to approximately 0 to 2 vdc 2 Connect volt ohmmeter common lead to terminal 12 DC common of unit control board Refer to section 5 3 Connect volt ohmmeter positive lead to terminal 14 of unit control board 4 ConnectSimpson sensor to 1 4 inch copper line leaving quench valve by attaching sensor securely to copper line and insulating same 5 Install gauge manifold on compressor suction service valve 1 4 inch port 6 Set temperature selector below container temperature and run unit 6 to 10 minutesin full cooling read DC volts of 7 8 Position temperature simulator switch TSS to 0 C 32_F position See Figure 1 4 Figure 1 5 Hold time delay override switch TDS in depressed position Set temperature selector to 6 C 21 F c Checking Suction M odulation Valve and Quench Valve peration 1 Notereadingon volt ohmmeter It should beless than 0 3 vdc and quench valve LED should not be illuminated 2 3 Slowly raise temperature selector setting temperature selector setting is raised the reading on the volt ohmmeter will vary
187. ntained and with return air control a maximum product temperature will be effectively maintained 2 Operation in the Dehumidification M ode Operation in the D ehumidification M ode HCS in position 1 With the set point setting below the air temperature at the supply air probe but above 10 C 14 F starts with controller relays TU and TQ energized The compressor and condenser fan contactors are energized through normally closed TC relay contacts The evaporator fan motors are as previously described Cooling capacity reduction by modulation is the same as described for the conventional operating mode when the return air relative humidity is below the setting on the humidity controller HC and as long as an out of range temperature condition exists regardless of return air relative humidity For relative humidities higher than the C setting if the supply air temperature drops to 2 3 6 above set point in range relay IRS energizes and in turn energizes heat relay contactor HR thorough closed N O relay HC contacts Also the in range and heat lights are illuminated at this time This applies power to the defrost and drain pan heaters This added head load causes the controller to open the modulating valve to match the new total heat load while still holding the supply air temperature very close to set point Opening the modulating valve reduces the temperature of the evaporator coil surface which increase
188. o 9 A 15 IN go o i a 3 d g m Mae eu O a a EY lt gt OY m 5 N e ou o hi 89 ke ARTWORK BENT35 9884 REV Figure 5 28 Electrical Wiring Schematic 69NT40 464 10 Sheet 1 of 2 5 56 281 ea LOuH 9 u SST 22 4 ST2 EMP2 D NE 1 e C 22 EM1 EF23 a rs a A EMG GRD EMG 328 CMG EMG CPG at E E peo comb 2 Hea Kei PC 8 otis pute etu AN a gt EXT a 8 u5 Leul m 4 PATE Cat LW O lt
189. o the suction and discharge service valves 6 Turn unit power The evaporator fan motors runningin high speed at this time Check to see if the 24 vac warning light isilluminated T hislightislocated on thetest board near the return air sensor signal T P6 test point R A Sensor Signal If the 24 vac light is illuminated stoptheunitimmediately and remove power supply from unit Check all wiring to the unit control board 7 Set multi meter to 30 vdc and plug one test lead in the TP4 jack DC com on the simulator board 8 Plug other test lead in the TP1 jack 12vdc on the simulator board Voltage should be 12 81 0 8 vdcon the multi meter If no voltage appears here check power supply 9 Repeat step 8 for the TP2 jack 9vdc Voltage should be 9 1 4 vdc If 12 vdc appears here recheck wiring This can happen after replacing a component on the unit 10 Place IRS switch to the right LED and IRS energize 11 Turn simulator IRS OFF left LED and IRS relay de energize 12 With the evaporator fan motors running turn TH switch ON right TH LED and relay energize 13 Using clamp on ammeter read the amps of the four 4 heater power leads H eater wiring connected to the heat relay terminals 21 22 and 23 Amperage reading should be 2 6 to 3 2 on four defrost heater leads marked If amps vary more than two 2A from legto leg turn power OFF and check wiring and or heaters The drain pan heater
190. ock Screw Terminal ountingAssembly Suction Valve And Positioning Springs In Place Piton RINGS 2 d a dee c PA PCENA V RETI Typical Setup For Testing High Pressure Switch Evaporator Fan Locating Dimension Defrost Air Switch Test Set Up Partlow Recording Thermometer Saginomiya Recording Thermometer Fuji Kiki Recording Thermometer Water Cooled Condenser Cleaning M odulating Solenoid Valve U nit Control Board estote aV Temperature Set Station And Plug SENSOR eee piece d tace p de a Diet ed ATH Pte Sensor And Cable Assembly ens Thermostatic Expansion Valve Humidistat dec pi umen Ov eu OR b Page 1 3 1 4 1 5 1 6 1 7 111 1 12 1 13 1 16 1 16 2 3 2 4 2 5 41 4 3 4 3 4 4 4 4 4 5 4 5 4 5 4 6 4 6 4 6 4 7 4 7 4 9 4 10 4 11 4 12 4 13 4 14 4 15 4 17 4 19 4 20 4 20 4 20 4 21 4 22 LIST OF ILLUSTRATIONS CONTINUED Figure Page 5 1 Electrical Wiring Schematic
191. of 2 5 18 10 4 50 CABLE POWER PLUG 4607 6 BK a 460 3 60 82 lt te sal gt 380 3 50 15275 R 13123 lt 6 n 777 21 82 2307 T za 121 122 a2 BT Ml 230 3 60 Ji uz 112 13 19025 50 TO E 5 3 5 211 2 8 4 50 777 e CABLE Famam ide n tet xi x2 24 ANP WP s 2 557
192. oints above 10 C 14 F the controller will maintain supply air atthe set temperature by the following modes of operation 1 Conventional H umidity Control Switch H CS in position O cooling by refrigeration with suction modulation and the compressor cycling at light loads Electric resistance heating 2 Conventional plus D ehumidification H umidity Control Switch in position 1 cooling by refrigeration with suction modulation and compressor cycling at low humidities suction modulation and simultaneous electric resistance heating at high humidities 1 Operation in the Conventional M ode Operation in the Conventional Mode HCS in position O with the set point setting below the air temperature at the supply air probe but above 10 C 14 F the unit starts in cooling with controller relays T U and TQ energized Compressor and condenser fan contactors are energized through relay TC contacts T9 and T3 now closed and relay TQ contactsT 7 to T6 now closed As the sensed temperature continues to fall the modulating valve current will remain at minimum under 0 2 amp until the sensed temperature drops 0 25 C 0 45 above set point With any further drop in sensed temperature modulated continuously variable capacity reduction occurs to match cooling requirements that are less than the maximum capacity of the unit This permits exact balancing of unit capacity with a wide range of cooling loads whil
193. oled condenser T he heat flows from the hot gas into the condenser coolant thus cooling the compressed gas and changing the state of refrigerant from a gas to a liquid From the condenser receiver the liquid refrigerant flows by a pressure relief valve which opens if the refrigerant pressure is abnormally high Theliquid refrigerant continuesthrough a liquid line shutoff valve filter drier which keeps refrigerant clean and dry a moisture liquid indicator and then to the thermostatic expansion valve As the liquid refrigerant passesthrough the orifice of the expansion valve some of it vaporizes into a gas flash gas H eat is absorbed from the evaporator air by the balance of the liquid causing it to vaporize in the evaporator coil The vapor then flows through the suction line to the compressor Thethermostaticexpansion valve bulb on the suction line near the evaporator coil outlet controls the valve maintaining a relatively constant superheat at the coil outlet regardless of load conditions except at abnormally high container temperatures such as during pulldown valve at maximum operating pressure condition 1 12 WATER COOLED CONDENSER AND WATER PRESSURE SWITCH OPTIONAL The water cooled condenser is used when heating the surrounding air is objectionable such as in a ship s hold and cooling water is available The water cooled condenser is of the shell and coil type with circulating water through the cupro nickel coil The
194. ompressor section includes the compressor with high pressure switch power cable storage compartment and an optional power transformer located to the left of the compressor This section also contains the modulating solenoid valve suction solenoid valve 69NT 40 quench valve moisture liquid indicator manual liquid line valve filter drier pressure relief valves an optional receiver and the optional water cooled condenser receiver Thesupplyair temperature sensor ST S islocated at the right of the compressor Table 1 2 Compressor M odel Number Significance Chart 06DR2379C C 1970 1st 2nd amp 3rd DIGIT 06D Hermetic Reciprocal 4th DIGIT Ree o eth DIGIT VOLUME b Condenser Section The condensing section consists of a condenser fan motor condenser fan and an air cooled condenser coil When the unit is operating with air cooled condenser 1 2 operation air is pulled in the bottom of the coil and discharges horizontally through the center of the unit Some units are equipped with an optional water cooled condenser condenser receiver and a water pressure switch T his switch is located on the water inlet line c Evaporator Section The evaporator section contains the recorder bulb controller return air sensor RTS thermostatic expansion valve evaporator fan motors and fans 2 evaporator coil and heaters drain pan and heaters defrost and heat termination swit
195. on of Oakite No 22 through the tubes to neutralize D rain this solution j Flush the tubes thoroughly with fresh water NOTE f the condenser cooling water is not being used as drinking water or is not re circulated in a closed or tower system neutralizing is not necessary Put the unit back in service and operate under normal load Check the head pressure If normal a thorough de scaling has been achieved 4 What You Can Do For Further Help Contact the Engineering and Service D epartment of the OAKITE PRODUCTS CO 19 Rector Street New York NY 10006 U S A for the name and address of the service representative in your area 424 CHECKOUT PROCEDURE FOR OPTIONAL POWER TRANSFORMER Ifthe unit does not start when connected to a 190 230 vac power supply check the following a Make sure circuit breaker CB2 is in the ON position If CB2 does not hold in check voltage supply b Check to see if the transformer internal protector IP AU TO TRANS isclosed Allow a reasonable length of time for transformer to cool down The transformer includes two 2 internal protectors Only one is wired into the system as the second protector is a spare To Check for Continuity Across the Internal Protector IP AUTO TRANS 1 Turn power OFF and disconnect power source 2 Disconnect white wires 1 and 2 from terminal board 4 16 3 Check for continuity across the internal protector IP If IP isopen and will not rese
196. op at the flange if O ring damage occurs The stylus will continue to fall container temperature will actually be higher if a leak developsin the flange capillary or bulb To replace the recording thermometer element 1 Turn unit OFF and disconnect power source 2 Remove middle back panel Remove bulb clamps securing bulb to unit 3 Remove two flange screws from recording thermometer and feed capillary and element through the unit 4 Pushreplacement bulb end and capillary through the unit 5 Fill slots with silastic RTV 432 Dow Corning 6 Attach bulb clamps tightly to bulb 7 Connectelementflangeto recorder making sure hub of flange faces out to fit into the hole in instrument case recording thermometer 8 Rezero the recorder Refer to paragraphs 4 19 through 4 19 d 9 Install inlet air grille and lower panel Start unit and check recorder calibration CAUTION Capillary tubing may be bent but never sharper than 1 2 inch radius extra care should be taken when bending adjacent to welds The sensing bulb should never be bent as this will affect calibration 4 20 RECORDING THERMOMETER SAGINOMIYA NOTE Do not overtighten chart nut after replacing chart a Battery 1 Open door and remove chart nut and platen 2 Push voltage indicator test switch item 2 Figure 4 18 Replace battery if voltage indicator points to the red or white zone b Calibration 1 Install new chart on platen 2 Pla
197. otectiveDevices 1 10 1 4 Current Limiting Switch Positions 1 13 2 1 Electrical Control Positions Above 10 C 14 2 6 2 2 Electrical Control Positions Below 10 2 7 4 1 Partlow Bulb Temperature Resistance Chart 4 22 4 2 Selector Settings And Resistance 4 23 4 3 Recommended Bolt Torque Values 4 23 4 4 Wear Limits For Compressors 4 24 4 5 Compressor Torque 4 25 4 6 Sensor D C Voltages ies dace Hee dy 4 25 4 7 Temperature Pressure Chart 12 4 26 SECTION 1 DESCRIPTION 11 INTRODUCTION This manual contains Operating Data Electrical Data and Service Instructions for the refrigeration units listed in Table 1 1 Also Table 1 1 charts most of the significant differences between these models The unit of lightweight aluminum frame construction is an all electric one piece self contained cooling and heating refrigeration unit The unit is designed to fit in the front of a container and to serve as the container front wall Fork lift pockets are provided for installation and removal of the unit The unit is
198. per section 4 3 d Charge unit with refrigerant per section 4 4 1 After unit is in operation inspect for moisture in system Refer to section 4 9 4 11 CHECKING OR REPLACING HIGH PRESSURE SWITCH 4111 Replacing High Pressure Switch a Remove the refrigerant refer to section 4 1 Frontseat both suction and discharge service valves to isolate compressor b Disconnect wiring from defective switch The high pressure switch is located on the center head and is removed by turning counterclockwise See Figure 1 1 c Install new cutout switch after verifying switch settings Refer to section 4 11 2 d Evacuate and dehydrate the compressor per paragraph 4 5 1 0 through 4 5 1 u 4 11 2 Checking High Pressure Switch WARNING Do not use a nitrogen cylinder without a pressure regulator because cylinder pressure is approximately 165 kg cm 2350 psi Do not use oxygen in or near a refrigeration system as an explosion may occur NOTE The high pressure non adjustable HPS is switch Bleed Off Valve 1 Cylinder Valveand 5 6 1 4 inch Connection Gauge 2 Pressure Regulator 7 High or Low 3 Nitrogen Cylinder Pressure Switch 4 Pressure Gauge 8 Ohmmeter 0 to 36 kg cm 0 to 500 psig Figure 4 14 Typical Setup for Testing High Pressure Switch a Remove switch as outlined in paragraph 4 11 1 b Connect ohmmeter or continuity light across switch terminals Ohm meter will indicate resistance an
199. plunger retaining rings with snap ring pliers As each retaining ring is removed the spring guide vane spring and pump vane may be removed from the vane cylinder in the bearing head See Figure 4 6 4 Push the pump rotor out of the bearing head by forcing against the rotor with a thumb Force from the bearing side and remove from the opposite side The pump rotor retaining ring will come out with the rotor 5 new bearing head complete with oil pump should be obtained from Carrier Transicold as a replacement to eliminate oil pump trouble However if the cause of pump failure can be determined in the field replacement parts may be ordered from Carrier Transicold to repair the pump 1 Oil Pump Cover 9 Retaining Ring 2 Cover Gasket 10 Spring Guide 3 Capscrews and 11 Bearing Head Lockwashers 12 Pump Rotor 4 Oil Pump Drive 13 Oil Feed Guide 5 Rotor Retaining Ring 14 Retainer Spring 6 Pump Vane Cylinder 15 Capscrews and 7 Pump Vane Washers 8 Vane Spring 16 Oil Inlet Passage Figure 4 6 Vane Oil Pump and Bearing Head Gear Oil Pump 1 Remove eight capscrews and remove oil pump bearing head assembly gasket and thrust washer See Figure 4 7 2 If it was determined that the oil pump was not operating properly the entire oil pump and bearing head assembly must be replaced Replacement parts for the pump are not available 4 5 1 Oil Pump amp Bearing Head 2 Thrust Washer Gear Pump Only 3
200. pump should mount flush with the crankcase Align the gasket and install the eight capscrewsinthe mounting flange 3 Install rotor with key Screw on equalizer tube and lock screw assembly with lock washer and bend over tabs of lock washer A ssemble suction strainer to motor and cover and bolt cover to crankcase A ssemble valve plates and gaskets A ssemble cylinder heads and gaskets Feel if the shaft will turn by hand 4 Install oil suction screen and bottom plate 48 CHECKING THE COMPRESSOR OIL LEVEL To Check the Oil Level in the Compressor l Operate the unit in six cylinder cooling for at least 20 minutes 2 Checkthefrontoil sight glasson the compressor to ensure that no foaming of the oil is present after 20 minutes of operation If the oil is foaming excessively after 20 minutes of operation check the refrigerant system for flood back of liquid refrigerant Correct this situation before performing step a 3 3 Turn unit off and the correct oil level should be between 1 4 and 1 2 of the sight glass If the level is above 1 2 oil must be removed from the compressor To remove oil from the compressor follow step d If the level is below 1 8 add oil to the compressor following step b below b AddingOil with Compressor in System Two methodsfor addingoil arethe oil pump method and closed system method 1 OilPump M ethod One compressor oil pump that may be purchased isa Robinair part no 14388 Thi
201. r An er H LLWA gt ae 182 9 09 i 4 5 amp rC 5 isco 9 E NN N 132 2248 m E g N aie 189 Ye exui a g MA TE t 33 m H I I 21 4 1225 XE GI E 8 zn ZNSA N on 4 01140 OL LEO EN 5 n d 9 z at HOEA D we Su QUSS 3 gt O vi1 e ans RR a o Ow 5 gt gt gt o Fle MC sy i i gt 5 ME S 239 6 n ASS WAN 5 2 l 204 y 9 2 per muc TA DE DO 4 VSH2 LO CPA CPB TBS 5 53 Figure 5 26 Electrical Wiring Schematic M 69NT40 464 9 15 Sheet 2 of 2 111 F2 M11 7 L11 M1 RS P2 K17 J13 K4 F13 H16 115 M12 H7 D16 SYMBOL Bo ey s cu ee O OO lt gt TSS UV WP DESCRIPTIO COMPRESSOR CONTACTOR CI
202. r an illustration of the compressor Refer to Table4 4 and Table4 5 for applicable compressor wear limits and torque values a Place the compressor in a position where it will be convenient to drain the oil Remove the oil plug on oil pump inlet passage see Figure 4 6 for location to vent the crankcase L oosen the drain plug see Figure 4 2 in bottom plate and allow the oil to drain out slowly Remove the plug slowly to relieve any crankcase pressure A plug in the bottom center of the crankcase may also be removed for draining the motor end more quickly Some units do not have this plug Cylinder Head Gasket Discharge Valve Screw and Lockwasher Discharge Valve Stop Discharge Valve Valve Plate Valve Plate Assembly Valve Plate Gasket SOY ee OU Een Figure 4 4 E xploded View of Valve Plate Assembly b Remove cylinder head capscrews If the cylinder head isstuck tap the cylinder head with a wooden or lead mallet Be careful not to drop the head or damage the gasket sealing surface See Figure 4 2 and Figure 4 4 Remove cylinder head gasket c Freethe valve plate from the cylinder deck by using the discharge valve hold down capscrews as jack screws through the tapped holesof the valve plate after the valve stops and valves have been removed R emove valve plate gasket See Figure 4 4 4 4 d Turnthe compressor over on its side and removethe bottom plate R emove the capscrews and connecting rod caps see Figure
203. reign material in valve body 5 Thethermal bulb is located below the center of the suction line 4 o clock position This area must be clean to ensure positive bulb contact Strap thermal bulb to suction line and insulate both with Presstite b Installing Expansion Valve 1 Replace all gaskets make sure to lightly coat with refrigerant oil Insert cage and power assembly and bolts Tighten bolts equally Fasten equalizer flare nut to expansion valve 2 Leak check the unit per section 4 2 Evacuate and dehydrate unit per section 4 3 and add refrigerant charge per section 4 4 2 3 Clean suction line with sandpaper before installing bulb to ensure proper heat transfer Strap thermal bulb to suction line making sure bulb is firmly against suction line The bulb is located in the 4 o clock position on the suction line 4 Check superheat See Table 4 7 Superheat settingis4 4to 5 5 C 81010 C 32 container temperature Checking Superheat NOTE It is not recommended adjusting internal adjustable valves unless absolutely necessary If a replacement valve has the wrong superheat setting the valve may be adjusted if you do not have another replacement valve on hand Due to the time involved in adjusting the superheat replace the valve rather than adjusting it 1 gt ee E Power Assembly Body Flange Gaskets Seat Gasket Bulb Cage Assembly Body Flange Body Flange Screws 4
204. rost initiation timer is included in the timing and current control board The time interval between defrost initiations 90 second test 3 hours 6 hours 12 hours or 24 hours is set with the defrost interval selector switch DIS The controller initiates defrost providing the evaporator coil temperature is below 13 55 required to close the defrost termination thermostat contacts by 1 Energizing defrost relay DR energizes the defrost light and stops the evaporator fan motors by de energizing the evaporator fan motor contactor 2 De energizingcoolingrelay TC and energizing and heating relay TH This stops the compressor and condenser fan motor and energizes the defrost and drain pan heaters D efrosting is terminated by the defrost termination thermostat which opens when the evaporator coil temperature rises to 24 C 75 after all frost has been melted from the coil Also defrost may be manually initiated at any time by actuating the manual defrost switch M D S NOTE D efrost interval timing restarts at time zero whenever the time delay override switch TDS is depressed or control circuit power is restored after an interruption such as occurs when stopping or starting unit ST switch n Out of Range Indication Time Delay D uring defrost the temperature at the sensing probe rises above the upper in range limit which would result in an out of range indication if the temporary condition were no
205. s section contains Electrical Wiring Schematics and Diagrams covering the M odels listed in Table 1 1 The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this manual T hey are recommeded precautions that must be understood and applied during operation and maintenance of the equipment covered herein WARNING Beware of unannounced starting of the evaporator and condenser fans Do not open condenser fan grille before turning power OFF and disconnecting power plug WARNING Donot attempt to remove power plug s beforeturning OFF start stop switch ST unit circuit breaker s and external power source M ake sure the power plugs are clean and dry before connecting to any power receptacle WARNING Do not use a nitrogen cylinder without a pressure regulator because cylinder pressure is approximately 165 kg cm 2350 psi Do not use oxygen or near a refrigeration system as an explosion may occur WARNING Make sure power to unit is OFF and power plug disconnected before removing capacitor S CAUTION Make sure that the unit circuit breaker s CB and the start stop switch are in the OFF position before connecting to any electrical power source 5 1 LINE K14 2 M9 E4 D2 M8 KS M8 L8 19 5 69 P2 H9 K17 G18 P4 04 04 N4 L18 L13 N4 E12 E13 615 K14 L6 M12 113 P6 P7 E8 68 12 1 3 GB E15 L10 kg K10 E8
206. sed 3 10 NO EVAPORATOR AIR FLOW OR RESTRICTED AIR FLOW Evaporator coil blocked Frost on coil Dirty coil No or partial Evaporator fan motor internal protector open evaporator air flow Evaporator fan motor s defective E vaporator fan s loose or defective 3 3 REFERENCE SECTION 4 17 or 4 23 4 18 4 18 4 4 4 12 4 10 4 2 4 4 4 27 3 10 3 6 4 14 4 28 Tighten 4 5 4 5 3 11 4 8 4 14 4 18 4 14 4 18 4 26 4 26 6 4 26 4 26 1 16 d gt 4 14 4 14 4 28 4 14 INDICATION TROUBLE POSSIBLE CAUSES 3 11 EXPANSION VALVE MALFUNCTION Low suction pressure with high superheat High suction pressure with low superheat Liquid slugging in compressor Fluctuating suction pressure 3 12 WATER COOLED CONDENSER OR WATER PRESSURE SWITCH MALFUNCTION High discharge pressure Condenser fan starts and stops L ow refrigerant charge External equalizer line plugged Wax oil or dirt plugging valve or orifice formation at valve seat Superheat too high Power assembly failure Loss of element bulb charge Broken capillary Foreign material in valve Superheat setting too low External equalizer line plugged Ice holding valve open Foreign material in valve Pin and seat of expansion valve eroded or held open by foreign material Improper bulb location or installation Low superheat setting Dirty coil Noncondensibles Water pressure switch malfunction Water
207. soil pump adaptsto a 3 785 liters one U S gallon metal refrigeration oil container and pumps 0 0725 liters 3 and 1 2 ounces per stroke when connected to the suction service valve port 150 thereisno need to remove pump from can after each use When the compressor is in operation the pump check valve prevents the loss of refrigerant while allowing servicemen to develop sufficient pressure to overcome the operating suction pressure to add oil as necessary Backseat suction service valve and connect oil charging hose to port Crack the service valve and purge the oil hose at oil pump A dd oil as necessary 2 Closed System M ethod In an emergency where an oil pump is not available oil may be drawn into the compressor through the suction service valve CAUTION Extreme care must be taken to ensure the manifold connection remains immersed in oil at all times Otherwise air and moisture will be drawn into the compressor Connect the suction connection of the gauge manifold to the compressor suction service valve port and immerse the common connection of the gauge manifold in an open container of refrigeration oil Crack the suction service valve and gauge valve to vent a small amount of refrigerant through the common connection and the oil to purge the lines of air Close the gauge manifold valve With the unit running frontseat the suction service valve and pull a vacuum in the compressor crankcase SLOWLY
208. sthe rate water is condensed from the air passing through the coil Removing water from the air reduces the relative humidity until the HC setting 15 reached and controller H C contacts open to de energize heating Humidity controller HC will continue to cycle heating to maintain relative humidity below H C setting With set points below 10 C 14 F operation is the same as previously described for conventional mode heating and dehumidification are locked out k TimeDelays TC relay operation is affected by a time delay function of the Timing and Current Control Board its purpose is to prevent short cycling of the compressor To prevent short cycling of the compressor a six minute compressor off time must be satisfied When the timer completes its six minute cycle the following temperature requirements must be met to allow the compressor to start 25C 45 F from setpoint setpoints above 10 C 14 F 2 50 9 F fromsetpoint setpointsbelow 10 C 14 F U ntil these temperature requirements are met the timer will continue to cycle Additional transient override time delays affect the operation of TC and TH relays These delays are all overridden by pressing the time delay override switch TDS Lockout Functions eating function lockout for set points below 10 C 14 F is achieved by relay TH being prevented from energizing m Selectable Time Interval Defrost selectable interval def
209. sulation and door seals for damage Effect permanent or temporary repairs 3 Visually check evaporator fan motor mounting bolts for proper securement 4 Check for dirt or grease on evaporator fan or fan deck and clean if necessary 5 Check evaporator coil for cleanliness obstructions Wash with fresh water Refer to section 4 13 6 Check defrost drain pans and drain lines for obstructions and clear if necessary Wash with fresh water 7 Check panels on refrigeration unit for loose bolts and condition of panels M ake sure T I R devices are in place on access panels b Check condenser coil for cleanliness Wash with fresh water Refer to section 4 17 Check position of fresh air makeup vent cover O perator must determine if fresh air makeup vent cover is to be opened or closed d Open Partlow recording thermometer equipped door and do the following 1 Manually wind clock on recording thermometer keyislocatedinaclip KEY MUST STAY WITH THE THERMOMETER 2 Liftstylus pen by pushing down the stylus lifter and rotating the lifter clockwise raising stylus at same time until lifter locks in position 3 Install new chart on recording thermometer making sure chart is under the four corner tabs R elease stylus lifter by pushing down and rotating lifter counterclockwise until stylus lifter locks in position and stylus has made contact with chart Then secure door e Open Saginomiya recording thermome
210. supply interruption 3 13 STEP UP POWER TRANSFORMER MALFUNCTION U nit will not start Circuit breaker 2 tripped Step up transformer internal protector open Step up transformer defective Power source not turned ON 3 4 REFERENCE SECTION 4 2 4 4 Open 4 27 4 2 4 3 4 27 4 27 4 27 4 27 4 27 4 27 4 2 4 3 4 27 4 27 4 27 4 27 4 23 4 23 4 24 4 24 SECTION 4 SERVICE 4 1 REMOVING THE REFRIGERANT NOTE To avoid damage to the earth s ozone layer use a refrigerant recovery system whenever removing refrigerant To Sevice any High and Low Side Refrigeration Component Store the refrigerant charge in an evacuated container Attach hose line to liquid line valve to remove liquid refrigerant 42 REFRIGERANT LEAK CHECKING a The recommended procedure for finding leaks in a system is with a halide torch or electronic leak detector Testing joints with soapsuds is satisfactory only for locating large leaks b If system is without refrigerant charge system with refrigerant to build up pressure between 2 1to 3 5 kg cm 30to 50 psig Remove refrigerant drum and leak check all connections NOTE t must be emphasized that only the correct refrigerant drum be connected to pressurize the system ny other gas vapor will contaminate the system which will require additional purging and evacuation of the high side discharge
211. t connect wires 3 and 4 18 gauge to terminal board Check to see if unit will start d If the internal protector and circuit breakers and CB2 are good check the transformer Use a voltmeter and with the primary supply circuit ON check the primary input voltage 230 vac Next check the secondary output voltage 460 vac at the voltage selector switch The transformer is defective if voltage is not available 4 25 SERVICING THE MODULATING SOLENOID VALVE CAUTION It is important to verify for 0 32_F simulated temperature aniy that the quench function occurs before full modulating valve closure occurs and compressor shuts off R efer to section 4 12 Valve Checkout Procedure Modulation for 0 C 32 F simulated temperature can be verified in several ways Without use of test equipment listen for a change in compressor sound F eel for a drop in condensing air temperature as the suction modulating valve closes If a gauge manifold is connected to unit pressures will drop as modulating valve closes The preferred method of monitoring controller output to the modulating valve is by reading the DC voltage between terminals 12 and 14 on the main circuit board temperature controller R eadings under 0 2 vdc correspond with valve wide open Full closure of valve corresponds with 1 1 and 1 3 vdc NOTE A bove voltages are numerically equal to valve currents 0 2 vdc 2 0 2 amp DC a When coolinga chill load
212. t following instructions included with kit j Install high pressure switch on compressor k Install compressor and mounting plate in unit I Install junction box to compressor and connect all wiring per wiring diagram refer to section 5 and then install junction box cover m Install new gaskets on service valves n Install mounting bolts in service valves and torque to a value of 2 77 to 4 15 mkg 20 30 ft Ib Change filter drier Refer to section 4 10 p Attach two lines with hand valves near vacuum pump to the suction and discharge service valves D ehydrate and evacuate compressor to 500 microns 75 9 cm HG vacuum 29 90 inches Hg vacuum Turn off valves on both lines to pump q Fully backseat open both suction and discharge service valves Remove protective guard from lower section of the Remove vacuum pump lines s Start unit and check refrigerant charge Refer to paragraph 4 4 1 b t Check moisture liquid indicator for wetness Change filter drier if necessary Refer to sections 4 9 and 4 10 Check compressor oil level per paragraph 4 8 a A dd oil if necessary Refer to paragraph 4 8 b 4 6 COMPRESSOR DISASSEMBLY NOTE Removing the press fit stator in the field is not recommended The rotor and stator are a matched pair and should not be separated W hen disassembling compressor matchmark parts so they may be replaced in their same relative positions See Figure 4 2 fo
213. t overridden Circuitry on the timing and current control board worksin conjunction with the temperature control circuitry to delay de energization of the in range relay IRS until approximately 90 minutes after the temperature at the sensing probe goes beyond the in range temperature limits A normal operating unit will return from defrost to an in range condition before expiration of the 90 minute delay and no interruption of indication will occur Indication of the instantaneous temperature condition out of range can be obtained by pressing the time delay overrride switch TDS o Function and Calibration Check The controller has precision resistors that simulate sensing probe temperatures to permit readily checking controller functions and calibration without using temperature baths or other temperature measuring instruments Sensing probe temperature is simulated by holding the temperature simulator switch TSS in the desired position 0 C 32 17 8 C 0 When checking controller functions and calibration it is also necessary to hold the time delay override switch TDS depressed to obtain immediate controller responses D epressing switch TDS does the following 1 Cancels 90 minute in range delay paragraph n 2 Cancels 6 minute compressor recycle delay paragraph k 3 Cancels relays TC OFF and TH ON nuisance cycling delays Paragraphs j and 4 Resets defrost
214. te 3 to 4 Condenser Gravity Circulation Figure 4 20 Water C ooled Condenser Cleaning e Fillthe tubes with thissolution byfilling fromthe bottom See Figure 4 20A Important be sure to provide a vent at the top for escaping gas f Allow the Oakite 32 solution to soak in the tube coils for several hours periodically pump circulating it with an acid proof pump An alternate method may be used whereby a bottle see Figure 4 20B filled with the solution and attached to the coils by a hose can serve the same purpose by raising and lowering of the bottle The solution must contact the scale at every point for thorough descaling therefore ensure that no air pockets exist by regularly opening the vent to release gas Keep flames away from the vent gases g The time required for de scaling will vary depending upon the extent of the deposits One way to determine when de scaling has been completed is to titrate the solution periodically using titrating equipment provided free by the O akite Technical Service representative As scale is being dissolved titrate readings will indicate that the O akite No 32 solution is losing strength W hen the reading remains constant for a reasonable time this is an indication that scale has been dissolved h When de scaling is complete drain the solution and flush thoroughly with fresh water i Next circulate a 56 7 grams 2 ounce per liter one U S gallon soluti
215. ter if so equipped door and do the following 1 Check Chart drive battery condition Refer to section 4 20 2 Lift stylus pen by pushing in the stylus lifter and rotating the lifter clockwise raising stylus at same time until lifter locks in position 3 Install new chart on recording thermometer making sure chart is under the four corner tabs R elease stylus lifter by pushing down and rotating lifter if so 2 1 counterclockwise until stylus lifter locks in position and stylus has made contact with chart Then secure door f Open Kiki recording thermometer if so equipped door and do the following 1 Check Chart drive battery condition Refer to section 4 21 2 Lift stylus pen by pushing in the stylus lifter and rotating the lifter clockwise raising stylus at same time until lifter locks in position 3 Install new chart on recording thermometer making sure chart is under the four corner tabs R elease stylus lifter by pushing down and rotating lifter counterclockwise until stylus lifter locks in position and stylus has made contact with chart T hen secure door g Open the control contactor box door Check for loose electrical connections or hardware h Check color of moisture liquid indicator i Check oil level in compressor sight glass j Check quench valve operation k Check modulation valve coil resistance Refer to section 4 25 Start refrigeration unit Refer to section 2 3
216. through the evaporator coil where it is either heated or cooled and then discharged outthe bottom of the refrigeration unit into the container Refer to paragraph 1 44 fan motor bearings are factory lubricated and do not require additional grease WARNING Always turn OFF the unit circuit breaker CB1 and disconnect main power supply before working on moving parts a Remove upper access panel See Figure 1 1 by removing mounting bolts and T I R locking device Reach inside of unit and remove Ty Rap securing wire harness loop 4 10 b Removethetwo lower mounting boltsthat securethe motor fan assembly to the unit Loosen the two upper bolts as the motor mount upper holes are slotted Remove motor fan and wiring from unit Place fan motor and fan on a support Remove the wiring and fan d Lubricate fan motor shaft with a graphite oil solution N ever Seez Apply thread sealer Loctite brown in color to the two fan set screws Install fan on motor The evaporator fan locating dimension is shown in Figure 4 15 e Connect wiring per applicable wiring diagram refer to section 5 and install motor and fan assembly in unit Apply power momentarily to check fan rotation Refer to paragraph 1 4 If fan spins backwards refer to section 4 28 for two speed motors Replace access panel making sure panel does not leak ake sure T I R locking device is lockwired Qo ou
217. tion Thermostat Suction Solenoid Thermostat Location 11 Heater Termination Thermostat 69NT40 12 Drain Pan Heater Evaporator Coil 13 Safety Override Thermostat Location Evaporator Fan Motor 2 Optional Recording Thermometer Bulb Figure 1 2 Refrigeration Unit Rear Panels Removed 1 4 Es OO Suction Service Valve 8 Supply Air Temperature Sensor 9 Water Cooled Condenser Receiver 10 Sight Glass 11 Water Pressure Switch Location 12 Filter Drier 13 Quench Valve Solenoid or 14 Quench Valve Thermostatic Expansion A 2 5 m 4 V J SS SIDE VIEW Moisture Liquid Indicator Liquid Line and Charging Valve Suction Solenoid Valve 69NT40 Modulating Solenoid Valve High Side Pressure Relief Valve Low Side Pressure Relief Valve Receiver Figure 1 3 Water C ooled C ondenser R eceiver Section 1 5 UT UU ase
218. to check switch action NOTE U se a hand aspirator P N 07 00177 01 since blowing into tube by mouth may cause an incorrect reading e With the gauge reading at zero apply air pressure very slowly to the air switch An ohmmeter will indicate continuity when switch actuates f Referto paragraph 1 3 e for switch settings If switch failsto actuate at correct gauge reading adjust switch by turning adjusting screw clockwise to increase setting or counterclockwise to decrease setting g Repeat checkout procedure until switch actuates at correct gauge reading h After switch is adjusted place a small amount of paint or glycerol on the adjusting screw so that vibration will not change switch setting Ohmmeter or Continuity Device Adjustment Screw 0 050 socket head size Low Side Connection Pressure Line or Aspirator Bulb P N 07 00177 01 Magnehelic Gauge P N 07 00177 High Side Connection Figure 4 16 Defrost Air Switch Test Set Up 4 17 CONDENSER COIL The condenser consists of a series of parallel copper tubes expanded into copper or aluminum fins The condenser coil must be cleaned with fresh water or steam so the air flow is not restricted Fan rotation is counterclockwise when viewed from shaft end of motor WARNING Do not open condenser fan grille before turning power OFF and disconnecting power plug To Replace the Condenser Coil a Store the refrigerant charge in an evacuated container
219. trical Wiring Diagram M 69NT40 464 3 Sheet 2 of 2 5 29 LINE 2 M9 4 04 04 4 L17 J12 4 F12 H15 H14 7 M12 P7 P8 67 E15 11 J10 3 11 H11 69 610 110 13 13 15 G14 NI G14 68 MI SYMBOL C CB1 CDV CF CHT CL CM CSS HBL HBR HTL HTR 15 C U Ug DTT EF EM FLA HL HPS HR HTT IP IRL IRS MDS RTS SMV ST STS TB F10 F11 J15 TC P17 611 115 15 G17 M10 L10 TDS TH TR TQ TSS TU UV UVT ND DESCRIPTION COMPRESSOR CONTACTOR CIRCUIT BREAKER 460V CAPILLARY DE SUPERHEATER VALVE R22 OPTION CONDENSER FAN CONTACTOR CYLINDER HEAD THERMOSTAT R22 OPTION COOL LIGHT CWHITE CONDENSER FAN MOTOR COMPRESSOR MOTOR TEMPERATURE SET STATION DEFROST HEATER BOTTOM LEFT DEFROST HEATER BOTTOM RIGHT DEFROST HEATER TOP LEFT DEFROST HEATER TOP RIGHT DEFROST INTERVAL SELECTOR DEFROST LIGHT CAMBER DRAIN PAN HEATER DEFROST RELAY DEFROST TERMINATION THERMOSTAT EVAPORATOR FAN CONTACTOR EVAPORATOR FAN MOTOR FUSE FULL LOAD AMPS HEAT LIGHT CAMBER HIGH PRESSURE SWITCH HEATER CONTACTOR HEAT TERMINATION THERMOSTAT INTERNAL PROTECTOR IN RANGE LIGHT GREEN CONTROLLER RELAY CIN RANGE MANUAL DEFROST SWITCH RETURN TEMPERATURE SENSOR SOLENOID MODULATING VALVE START STOP SWITCH SUPPLY TEMPERATURE SENSOR CONTROLLER TERMINAL TERMINAL BLOCK CONNECTION CONTRO
220. ve Opens 18 63 kg cm 265 psig High Side Valve Opens 34 10 485 psig m Refrigerant O perating L evel after 20 minutes operation with unit in cooling Refer to section 4 4 n Unit Weight Refer to Table 1 1 o Water Pressure Switch Cut In 0 5 0 2 kg cm 7 Cutout 1 6 0 4 kg cm 22 10 psig 10 psig 10 psig 10 psig 3 psig 5 psig 1 8 Suction Solenoid Thermostat 69NT 40 Closes at 12 2 1 7_ 10 Opensat 6 7 3 3 20 6 14 ELECTRICAL DATA a Circuit Breaker s CB 1 Trips at 24 2 Amps CB 2 Trips at 50 0 Amps b Compressor M otor Full Load Amps FLA M 69NT 40 17 6 Amps 9 460 vac with current limiting switch in position B c Condenser Fan M otor Bearing Lubrication Factory lubricated additional grease not required Full Load Amps 2 0 4 0 FLA Nominal H orsepower 0 43 0 75 hp Rotation CCW when viewed from shaft end Speed 1425 1725 Voltage 190 380 208 230 460 vac 1ph 50 60 hz d Drain Pan Heaters Number of H eaters 1 Rating 750 watts 5 10 96 at 460 Resistance cold 22 7 5 ohms nominal Type Sheath e Evaporator Coil Heaters Number of H eaters 4 Rating 750 watts each at 230 5 10 volts Resistance cold 20 C 68 F Ambient 66 8to 77 2 ohms Sheath f Evaporator Fan 5 Bearing Lubrication Factory lubricated additional grease not required Full Load Amps
221. voltage H eater contactor or coil defective eater s burned out Initiates but does not defrost Frequent defrost Wet load 3 2 REFERENCE SECTION Check Check Turn on Replace Replace 4 18 4 14 4 13 4 15 Replace 4 14 4 28 Replace 3 9 Replace Tighten 15 Reset 3 9 4 13 1 16 f Tighten Replace 4 13 Replace Replace 2 4 3 1 6 Replace 4 15 Normal INDICATION TROUBLE POSSIBLE CAUSES 3 7 ABNORMAL PRESSURES COOLING Condenser coil dirty Condenser fan rotating backwards Condenser fan inoperative Refrigerant overcharge or noncondensibles Quench solenoid valve malfunction High discharge pressure Low suction pressure Suction service valve partially closed Filter drier partially plugged Low refrigerant charge Expansion valve defective No evaporator air flow or restricted air flow Excessive frost on evaporator coil E vaporator fan s rotating backwards 3 8 ABNORMAL NOISE OR VIBRATIONS Compressor Loose mounting bolts Worn bearings Worn or broken valves Liquid slugging Insufficient oil Condenser or Bent loose or striking venturi Evaporator Fan Worn motor bearings Bent motor shaft 39 TEMPERATURE CONTROLLER MALFUNCTION Controller relay s defective D efective Sensor D efective wiring Controller malfunction Will not control or relay s do not actuate at proper temperature Compressor does not start or stop at specified temperature Time delay period not elap

Models 69NT20-284 69NT40-461 69NT40-464

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