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Service Manual - Boston Heating Supply

1. lll Cooling Characteristics lll Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart 7 188 Itan gt 82 13 on 05 gt gt 2 8 oC 2 do 2 1 23 is B 174 og 30 2 434 LA As VA boo eic tem Sex 3 0 10 ae k in a i gor Q7 2 3 Last g t ON La 5 160 KE Z 362 11 J 9 25 a 1 1 a 3 tie 5 146 i 290 1 0 77 86 95 104 2 0 53 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart 8 6 l 1 z EE 7 La 5 5 2 5 5 5 m eoram axe QUA 2 ito oo Pa cial E eT E E X a vem amp 4 Jo 9 RE corp 12 9 2290799 Toc V 5 l
2. lll Cooling Characteristics lll Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart Sa 474 pan Sa 82 2 82 40 g ndoot aC fe g 2 160 gore 2770 2 506 g 1 1 au 8 65 By of 24 0 aS u 15 M o 1 ENS 5 2 HTC 146 0 a fos s 3 IH 5 es 132 362 0 9 77 86 95 104 2 5 23 32 41 50 59 68 7 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart 9 as T z g g a 8 27 2 E E 3 a 6 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 e J X 68 0 20 D 181 55 4 g 122 2 64 4 18 E 50 TK wee o 60 8 16 113 45 Le o o
3. YOQANI OL mae T moni LINN LB HOQQNIS HOQQNIO Shab EI i y 91 G SE Bye ae ea RS he gt a 2 a i i i i i i H 3 21500000000 m ED lt 1 7 Hq in X E ui x o o B F gt nz Tu T 28 i ma T zl TANNYD ju ono 5 a a 4 manen S I A89 8 2 maa Eole 34 aol 2 aja 2 amp 2 5 Loyo f El Linman 1 DH lt 5 AM fes HM a THM 5 m c HOLO3NNOO d2 ya o S o 1HM Zoo TA JE m As Laaa 2 6 Loyo 10 JE lt H 7 56 amp E 8 E zt S lt lt a I tc ui Or 5 IHM A99 peo 8 20 ona 2 5 sib wid EE aad aay 418 4 qz E 9 Zle o 34 2 Jh amp HOLO3NNOO d2 ui esr au aie zi EF 980 717 2 m 9 a La ym 5 T x eh zd o ona 8 6 LHM amp a ES a az pele ma z ag HOLOSNNOO dz 9 o a i B E HOLSIWHSHL a HOISINHSHLNO TA DE 1 18 13A col eax 14 9 Q JE 3A
4. E Cooling Characteristics i Heating Characteristics RH 4696 Indoor fan speed High fan RH 8596 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart 2G 9 a S 174 Sa 8 12 ge 5 5 amp 506 8 i 2 5 3 160 g 11 8 de 2 5 434 1 D 9 8 0 Ip 146 4590 S 8 1 0 8 a DK i z 362 8 2 5 132 0 9 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart 10 6 9 SP H H 8 DAKO t BE E RER g E N d 55 ec 2 E 7 woh Gp 2 2 E oro CL E e 7 84 E gt 5 1 1 4 l 3 3 77 86 95 104 23 32 41 50 59 68 77 25 30 85 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 Qiorn Dm Hien 68 0 20 131 55 Uu 9 644 18 9 122 50 sre o p 30 C E SK
5. 506 are 5 Le Sa TS ge et s 8 A 1 B 434 eoo ar Q 3 0 Zo 8 AW 2 e 5 362 5 25 g E 2 290 amp 2 0 lt D x 218 1 5 93 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 2 Operating current performance chart Ie 14 yal 2 ws AS E 13 8 DAS 5 lt 0 e 2 Y 2 12 11 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 3 Indoor discharge air performance chart 140 60 oO 6 kj 9 181 55 LES u Ree ty X oC L 122 50 So 3 AQU a 113 45 63 9 104 40 5 95 35 A lt 2 5 86 30 8 77 25 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 35 5 2 Cooling Capacity Outdoor Unit CMH1972 Indoor Unit KMHS0972 3 Power Supply 230V Single Phase 60Hz
6. Service valve on ete SERRE Wide tube T DW d opas xt O OlE CW O D 3 8 High pressure 2 9 lI BW TEES O D 1 2 X AW X H 9 Defrost valve for Xe E Electric hot gas bypass 2 Service valve on s EE u narrow tube Va D 2 Narrow tube DN i O D 1 4 CN HH Y bX CH gt TRS O D 1 4 m E Ja BN EDX O D 1 4 NE AN Cooling cycle O D 1 4 gt q C gt bius See eee dd Strainer Header Heating cycle Defrosting cycle Insulation of Refrigerant Tubing IMPORTANT Because capillary tubing is used in the outdoor unit both the wide and narrow tubes of this air conditioner become cold To iun prevent heat loss and wet floors due to dripping of condensation both tubes must be well insulated with a proper insulation material The thickness of the insulation should be a min 5 16 8 mm After a tube has been insulated never try to bend it into a narrow CAUTION curve because it can cause the tube to break or crack 21 Thickness Min 5 16 8 mm Wide tube x Thickness Min 5 16 8 mm Narrow tube 5 PERFORMANCE DATA 5 1 Temperature Charts 5 1 1 Temperature Charts CMH1972 Outdoo
7. C o 506 ATO 59 05 acm ot RO B 2 434 x ei 4 o 3 0 ae 8 TL S 5 362 5 25 c g E 9 290 amp 2 0 lt D x 218 1 5 93 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 2 Operating current performance chart T 9 5 o 2 amp 11 23 2 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 3 Indoor discharge air performance chart 140 60 5 x ose 13165 NES n AO 9 122 50 AT 8 Gan amp 113 45 E S 4j 104 40 S 95 35 3 5 86 30 3 77 25 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 34 Outdoor Unit CMH3172 Indoor Unit KMHS2472 X 1 lll Cooling Characteristics RH 46 Indoor fan speed
8. e The table lists the wall mounted type of indoor units as representative models Save this Combination Table Please be sure to hand over this sheet to the user S 4 Room Outdoor Unit Combination Table CMH3172 lt Combinations of Connectable Indoor Units gt The combinations of the indoor units listed in Table 1 and Table 2 are combinations solely of those units which can be operated concurrently In addition to the combinations listed in the table other combinations of indoor units are possible provided that the following conditions are satisfied Conditions 1 Atleast two or more indoor units must be connected to the multi outdoor unit It is not acceptable for only one indoor unit to be connected 2 The total rated cooling capacity of the indoor units to be connected must be no more than 200 of the rated cooling capacity of the outdoor unit CAUTION In this case all the indoor units installed must not be operated concurrently under any N circumstances Otherwise the air conditioner may not run properly and trouble may occur Example When 4 indoor units are connected at 230V If the following holds true e Rated cooling capacity of CMH3172 outdoor unit C 30600 BTU h e Rated cooling capacity of indoor units K1 K2 BTU h Then C x 2 200 K2 30600 x 2 7500 7500 11900 24200 61200 2 51100 It is therefore
9. nm Hafan D 68 0 20 L 2 64 4 18 i E j emo Beir 60 s 8 60 8 16 Tndoor a 9 oi 5 57204 ejr e T Lj s 1 24 C D or 15 6 12 E l 1 LT 2 5 50 0 10 1 1 9 46 4 8 77 86 95 104 25 30 35 40 Outdoor air temperature F C NOTE lll Heating Characteristics RH 85 Indoor fan speed High fan 230V 60Hz 1 High pressure performance chart 2 X 506 8 35 5 D 98 8 oF 2370 2 434 temp Tokika indo a ae 3 63 17 a 362 8 2 5 D x 290 2 0 53 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 2 Operating current performance chart 8 Z 7 t o 5 gt 3 F4 23 E 6 indoor air amp CA 5 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 3 Indoor discharge air performance chart 140 60 S 181 55 lt Ww gO gF 2 9 122 50 t Le Ho A 19 B 113045 en 104 40 9 5 95 35
10. o Operation lamp blinking Indoor fan dose not turn Outdoor fan dose not turn Does not cool or cooling performance is inadequate Does not heat or heating performance is inadequate Breaker O Refrigerant gas pressure 8 4 2 Inspection Points for Each Part 1 Outdoor control circuit board Refer to 8 3 1 Checking the outdoor unit ND Do not remove or insert the outdoor control circuit board connector when power is being supplied to it The controller will be damaged 2 Fuse Check it visually or the continuity with a tester 3 Compressor Check for an open circuit in the compressor coil winding 4 Compressor protective sensor compressor discharge temperature thermistor Check that the senseor is securely contained in the thermostart holder 5 4 way valve Short circuit the T RUN terminal to the COM terminal of TEST T RUN terminals Perfrom a test run of the unit alone and check whether the 4 way valve inside the outdoor unit produces a click sound 6 Coil thermistor Check that the sensor is securely contained in the thermostat holder 57 7 Electric expansion valve When replacing the electric expansion valve and coil be sure to attach the connectors in the correct positions Labels are applied to the valve body and coil corresponding to the connector colors to identify them Co
11. MERE LL 5 29 32 2 27 32 4 76 2 1 32 E e o Service valve on wide tube side Outer diameter 1 2 12 70 o 2 13 32 Fig 6c unit inch mm 11 2 5 Diagram of Outdoor Unit Installation Never install only a single indoor unit Be sure to connect indoor and outdoor units only in combinations that are listed in the catalog or in the combination table that was provided with the outdoor unit Use caution Connecting any other model may result in operation failure and malfunction The dimensions indicated by in the figure below are spaces that are required in order to maintain performance Install in a location where the dimensions indicated by are ensured and where 2 or more faces of the unit are unobstructed In principle the top direction should be unobstructed 07 OF an f f 2 2 W 77777 77 YY 6 15 of space if a drain hose is to be used WWW Yi 777777 LLL Yay 77 7 H W YY Base not provided concrete or similar material Fasten with anchor bolts not provided 3 8 or M10 4 locations Fig 7 12 Power 1 Indoor unit D Indoor unit C Indoor unit B Indoor unit A Access panel C Ground wire
12. 19 AWG American Wire Gauge es e Be sure to comply with local codes on running the wire from the indoor unit to the outdoor unit size of wire and wiring method etc e Each wire must be firmly connected e No wire should be allowed to touch refrigerant tubing the compressor or any moving part e Be sure to connect power wires correctly match ing up numbers on terminals of the outdoor unit and respective indoor units A D e Be sure to connect the power supply line to the outdoor unit as shown in the wiring diagram The indoor unit draws its power from the outdoor unit e Do not run wiring for antenna signal or power lines of television radio stereo telephone secu rity system or intercom any closer than 3 4 1 m from the power cable and wires between the indoor and outdoor units Electrical noise may affect the operation 5 3 Wiring System Diagram 3 indoor units with CMH1972 Disconnect switch Field supply z 0D HOT o 230208 OUTDOOR UNIT i g io d 8 Terminal 9P A GE 230 208V 1 lt 1 2 2 Grounding 2 E line i 3 Z Disconnect N switch Field supply A 2 E E 230 208V I 2 D ete 4 Q ae 8 2 230 208V oo ons 230 2
13. 5 3 8 9 52mm Ce Did 1 4 6 35mm 1 2 12 70mm Aj 3 8 9 52mm 5 y ee 1 4 6 35mm Flare 3 8 9 52mm Union 1 2 12 70mm L A joint for connecting tubes of different sizes 3 8 9 52mm 1 2 12 70mm Supplied Reducer Fig 4b 2 Connecting indoor unit for CMH2472 3 8 9 52mm Indoor unit Q4 e35mm ggr BED UA e35m pu uem 1 4 6 35mm t___ 3 8 9 52mm A Outdoor unit D 4 3 8 9 52mm a c a 3 8 9 52mm 1 5 3 8 9 52mm g H 1 2 12 70mm m Flare 1 2 12 70mm 1 4 6 35mm Union 3 8 9 52mm 1 2 12 70mm 3 8 9 52mm Supplied Reducer Fig 4c KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS1872 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS1872 Outdoor unit 3 8 9 52mm Indoor unit 9 52mm D 4 a 3 8 9 52mm 1 4 6 35mm be CA 3 8 9 52mm 1 4 6 35mm RE B 0 3 8 9 52 1 4 6 35mm umm 5 1 2 12 70mm 1 4 6 35mm Fig 4d Outdoor unit Indoor u
14. F 4 5 Trip 5 o 230 E 5Hz every 30 sec reduction 5 223 E 2Hz every 30 sec reduction 5 212 D Increase rohibit range E No control PM 9 Hz reduction o 194 Within the increase prohibit range the range changes to the Hz reduction range 2 Hz every 30 seconds if the compressor temperature rises by 4 F 7 2 5 Control at HEAT Start up If HEAT operation is started when the outdoor air temperature is 59 F or below the unit operates at the HEAT start up frequency 70 Hz or above Reset conditions 1 The compressor frequency exceeds the start up frequency of 70 Hz 2 The compressor thermostat is OFF 3 Frequency reduction for indoor high load control has occurred 4 The outdoor air temperature is above 59 F 5 The main unit switch on one or more indoor units is set to TEST run 52 8 TROUBLESHOOTING 8 1 Precautions before Performing Inspection or Repair E Both the indoor unit and outdoor unit include electronic control circuits Be sure to pay attention to the following before inspecting or repairing the outdoor side electronic circuits e High capacity electrolytic capacitors are used inside the outdoor unit controller inverter They retain an electrical charge charging voltage DC 311 V even after the power is turned OFF and some time is required for the charge to dissipate Be careful not to touch any electrified parts before the control
15. unsafe practice which can result in severe personal injury or death This symbol refers to a hazard or unsafe practice which can CAUTION ae result in personal injury or product or property damage If Necessary Get Help These instructions are all you need for most installation sites and maintenance conditions If you require help for a special problem contact our sales service outlet or your certified dealer for additional instructions In Case of Improper Installation The manufacturer shall in no way be responsible for improper installation or maintenance service including failure to follow the instructions in this document SPECIAL PRECAUTIONS WARNING When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH ONLY A QUALIFIED EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked Highly dangerous electrical voltages are used in this system Carefully refer to the wiring diagram and these instructions when wiring Improper connections and inadequate grounding can cause accidental injury or death Ground the unit following local electrical codes Connect all wiring tightly Loose wiring may cause overheating at connection points and a possible fire hazard Install a protective leakage breaker depending on the installation location especially a damp or humid location If a leak
16. 5 x 37 4 i a 2 te L z T E t x F F HEC Bl TE I fr 9 z ma TAA NHD B 2 Gi TANGO wpa AUD 8 z DGA ai 4r efe 13A 4 JE afa 099 r4 4 p a 8 lt 1HM T LHM 4 BHO i 5 LHM Ta LHM roy oy amp Bx a JHM tof to AYD Jo Q YHO LOANNOO dz tis TN o 1HM E ze o o TAA Jot 2 Jr c Gs afa 99 eje z z o z 5uo g 216 LHM ge y 8 EE gn E c gx S lt a Ze S Ein 8 E a a I IHM OT VISA z 5 1HM 5 wfiw AH9 lui Q 0 Bz z s n8 4s e gt asalana py S e 5 134 jo E amp HOLOANNOO de ir eue ee 5 4 Louo E g a t5 E T F go One amp o Auo To o Qa ow 4 D A n3 L or 2 Z2 efal 14 tale E az HOLOANNOO d2 8 O7 Tefal 2 T Ei 4x z t 940 Q o L z HOLSINHAHL a HOLSINHAHL NO TAA DE i vx TAA Z BA z o 13A 9 13 false lt 13 2 ET a 13 134 amp zs E HOLSINHAHL HOLSIWHSHL MO 8 YHOLSINYSHL NG HOLSIINH3H NV 2 viw TSA GE THA zz TA amp eufoul 3A TAA lt ES TAA TA HOLSIWHSHL MG HOLSINHAHL MV HOLOANNOO d2 H tr HOLSINHAHL TEM o uooaino E o ia sf Nua xa z frg 2 yma JA SRE oo x1
17. 3 2 Field supply 5 Sis eee 230 208v 8 a z 2121 5407 Gh d E 3 to 4720208 5 2 Gh 230 208V 6 Z Le es P Grounding line Disconnect switch han ee oP Q Lr power line 2 D Tesoro oTo D T A c 230 208V OF 8 KE Sg i z s QS 230 208V 9 5 Zo MERERI e z e Grounding 3 g line 230 208V 90 Disconnect switch a 2 Field supply Milk g i 2 2 _ D 910 02 5 HEN E pe lA 230 208V i gele eJ zZ Grounding B E 2 Fig 25b 5 4 How to Connect Wiring to the Terminal Loose wiring may cause the terminal to overheat or result in unit malfunction A fire hazard may also exist There fore be sure all wiring is tightly connected When connecting each power wire to the corresponding terminal follow the instructions How to connect wiring to the terminal and fasten the wire securely tight with the fixing screw of the terminal plate How to connect wiring to the terminal a For Indoor Unit 1 Cut the wire end with a cutting pliers then strip the insulation to expose the wire about 9 32 7 mm See the label Fig 26 near the terminal plate 2 Using a screwdriver loosen the terminal screw on the terminal plate 3 Insert the wire and tighten the terminal screw com pletely using a screwdriver b For
18. 43 F 6 1 C W B 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 39 Outdoor Unit CMH2472 Indoor Unit KMHS0972 3 Power Supply 230V Single Phase 60Hz lt Heating Capacity gt RATING CAPACITY 29 200 BTU h AIR FLOW RATE 847 CFM OUTDOOR INDOOR ENT TEMP F C AMBIENT TEMP F C 60 65 70 75 80 15 6 18 3 21 1 23 9 26 7 w 15 6 16 550 16 540 16 510 16 470 16 420 0 17 8 8 16 1 8 13 3 13 10 6 18 7 8 23 e o 28 2 D Total Heating Capacity BTU h 33 0 38 3 w 2 43 6 48 8 53 11 7 58 14 4 63 17 2 65 18 3 1 Rating conditions 4 Indoor Unit Entering Air Temp 70 F 21 1 C D B Outdoor Ambient Temp 47 F 8 3 C 43 F 6 1 C W B 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is f
19. 1 2 12 mu gt ei 174 6 35 4 8r 9 52mm LS 1 2 12 70mm Flare 1 2 12 70mm 1 4 6 35mm Union 3 8 9 52mm J 1 22 70mm 3 8 9 52mm Supplied Reducer Outdoor unit Fig 4g 3 8 9 52mm Indoor unit i 3 8 9 52mm VESS g o 52mm 14 6 35 g o 52mm 5 ci 3 8 9 52mm B 9 Le 1 2 12 70mm 07 0 1 4 6 35mm 1 2 12 70mm 1 2 12 70mm 9 Flare 1 2 12 70mm L 1 4 6 35mm Union 3 8 9 52mm 1 2 12 70 3 8 9 52mm Supplied Reducer Outdoor unit Fig 4h 3 8 9 52mm Indoor unit of 3 8 9 52mm UA G 35mm 5949 52mm A 3 8 9 52mm 1 4 6 35mm 1 2 12 70mm B 9 1 2 12 70mm 1 4 6 35mm 4 45 70mm Al a a 1 4 6 35mm Fig 4i KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS1872 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS1872 KMHS1872 3 8 9 52mm 3 8 9 52mm 1 2 12 70mm 1 2 12 70mm Flare 1 2 12 1 2 12 70mm 5 8 15 88mm Lo
20. a 13 9 19 TA TAA a HOLSINHSHL M8 HOLSINHSHL MO 8 Li a amp 5 a HOLSINYSHL NY aS rt TSA DE co zz 19 ca ex 19 LD 13A 4 HOLSINHZHL MY tr HOLSINHAHL Suo e HOOGLNO CAM Nug g 218 ma z eec lt xa TBA DAS 0 18 Lw 84 HOLIMS HOLSINUSHL Je 3unSS3Hd HOIH or aliad 8 ma se ma Bo d 1HM SES 1HM A us HOISINUAHL ONA NS ES HOSS3udWOo HOLO3NNOO d6 5 8 8FA2 5257 59100 1 42 Outdoor Unit CMH2472 To avoid electrical shock hazard be sure to WARNING disconnect power before checking servicing and or cleaning any electrical parts LINN HOGGNI OL Ea Gd LINN LINN A eg HOGANI 9 9
21. High pressure at wide tube service valve 362 2 5 290 2 0 218 1 5 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 2 Operating current performance chart 13 KON S 12 PS ET S KO 5 HAO 5 19 N 9 10 HAS KT 2 V E 9 8 7 23 2 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 3 Indoor discharge air performance chart PI 140 60 T S 181 55 12250 D Ie 2 113 45 5 5 104 40 5 9 95 85 9 5 86 30 8 77 25 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor u nit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 33 Outdoor Unit
22. Temperature F C Model No Quantity of Sensor of sensor CMH1972 CMH2472 CMH3172 Sensor Name Compressor temp sensor TKS293B 1 1 1 200 180 160 140 120 100 80 60 40 Resistance k ohm 20 32 50 68 86 104 122 140 158 176 194 0 10 20 30 40 50 60 70 80 90 Temperature F C 15 3 DIMENSIONAL DATA Outdoor Unit CMH1972 23 15 16 5 11 32 a 15 32 y 11 17 32 by N S 4 FA FU x C ue 1 ry zi 8 S al in 9 r 9 io 1 MM 1 l s e Y y 35 7 16 900 2 15 16 k 1 Wide tube service valve dia 3 8 9 52 x 3 1 1 1 1 1 i i Narrow tube service valve dia 1 4 6 35 x 3 S N 1 1 1 a o bg N Y 1 e A Ry e A E 1 1 N 3 S e N 1 N ib LI Y 1 13 16 2 1 16 BIS Unit inch mm 16 Outdoor Unit CMH2472 23 15 16 5 11 32 gt y 15 32 11 17
23. For Outdoor Unit INSTALLATION INSTRUCTIONS Inverter Multi Split System Air Conditioner COOL DRY HEAT Model This air conditioner uses the new refrigerant R410A Refrigerant service valve size 5 16 Contents Page IMPORTANT Please Read Before Starting 2 1 GENERAL eiie 3 1 1 Tools Required for Installation not supplied 1 2 Accessories Supplied with Unit 1 3 Optional Copper Tubing Kit 1 4 Type of Copper Tube and Insulation Material 1 5 Additional Materials Required for Installation 2 INSTALLATION SITE SELECTION 4 2 1 Indoor Unit 2 2 Connecting Indoor Units 2 3 Outdoor Unit 2 4 Outer Dimensions of Outdoor Unit 2 5 Diagram of Outdoor Unit Installation 3 INSTALLATION PROCESS 13 3 1 Embedding the Tubing and Wiring 3 2 Use of the Flaring Method 3 3 Flaring Procedure with a Flare Tool 3 4 Caution before Connecting Tubes Tightly 3 5 Tubing Connections 3 6 Insulation of Refrigerant Tubing 3 7 Taping the Tubes 3 8 Finishing the Installation 4 AIR PURGING 16 E Air Purging with a Vacuum Pump for Test Run E Pump Down 5 WIRING INSTRUCTIONS 19 5 1 General Precautions on Wiring 5 2 Recommended Wire Length and Diameter 5 8 Wiring System Diagram 5 4 How to Connect Wiring to the Terminal 5 5 Wiring Instructions f
24. TROUBLESHOOTING 8 1 Precautions before Performing Inspection or Repair mmm 8 2 Trouble Diagnosis by Error Monitop Lamps 8 3 Checking the Outdoor System memet 8 4 Trouble Diagnosis of Each Part 8 5 Trouble Diagnosis of Fan Motor REFRIGERANT R410A SPECIAL PRECAUTIONS WHEN SERVICING UNIT 9 1 Characteristics of New Refrigerant R410 A mme 9 2 Checklist before Servicing seen 9 3 Tools Specifically for RA10A 9 4 Tubing Installation Procedures mmm meme eene 9 5 In Case of Compressor Malfunction memet 9 6 In Case Refrigerant is Leaking ses 9 7 Charging Additional Refrigerant mmm 9 8 Retro Fitting Existing Systems nes APPENDIX INSTALLATION INSTRUCTIONS mH mnn APPENDIX B UNIT COMBINATION TABLES Page Indoor Unit Multi Outdoor Unit B APPLICABLE INDOOR UNITS KMHS0772 KMHS0972 KMHS1272 KMHS1872 KMHS2472 3 Room CMH1972 YES YES YES YES NO 4 Room CMH2472 YES YES YES YES 4 Room CMH3172 YES YES YES YES Neu The table lists the wall mounted type of indoor units as representative models 1 OPERATING RANGE Temperature Indoor Air Intake Temp Outdoor Air Intake Temp Cooling Maximum 95 F 71 F W B 115 F D B Minimum 67 F 57 F
25. lt Cooling Capacity gt RATING CAPACITY 19 100 BTU h AIR FLOW RATE 883 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F 105 115 ae a ne 40 6 46 1 Tue 19 180 18 500 17 770 17 210 16 350 15 440 PISIS 20 150 19 450 18 700 18 140 17 250 16 290 CE 21 140 20 420 19 640 18 180 17 180 SIS 22 130 21 400 20 600 20 080 19 130 18 100 PISIS 25 020 22 270 21 20 980 20 000 18 930 SHC SHC TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 1 Rating conditions Indoor Unit Entering Air Temp 80 F 26 7 C D B 67 F 19 4 C W B Outdoor Ambient Temp 95 F 35 C 2 Above data does not take Freeze Prevention Protection during cooling operation into account For this reason the value may vary from the actual cooling characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 36 Outdoor Unit CMH2472 Indoor Unit KMHS0972 3 Power Supply 230V Single Phase 60Hz lt Cooling Capacity gt RATING CAPACITY 23 200 BTU h AIR FLOW RATE 883 CFM INDOOR OUTDOOR ENT TEMP F AMBIENT TEMP F C 65 75 85 95 105 115 18 3 23 9 29 4 35 0 40 6 46 1 23 420 22 600 21 710 21 090 20 040 15 560 19 190 22 100 23 420 15 560 23 420 15 560 23 420 15 560 24 490 23 650 22 730 22 140 21 050 15 980 15 760 12 330 18 840 17 810 15 240 21 930 15 980 24 490 15
26. not provided 3 Installation Process 3 1 Embedding the Tubing and Wiring Do not connect tubes to locations that are embedded Be sure to bind refrigerant tubing and inter unit cables together with vinyl tape The power cable must be obtained on site 12 Less than 85 ft AWG American Wire Gauge Be sure to apply the provided labels to both ends of the inter unit cables to prevent miswiring Securely seal the end of embedded tubing with vinyl tape in order to prevent dirt or moisture entry e In order to prevent insulation breakdown and ground faults do not allow the wire ends to contact rainwater or be subject to dew condensation 3 2 Use of the Flaring Method Many of the conventional split system air conditioners employ the flaring method to connect refrigerant tubes which run between indoor and outdoor units In this method the copper tubes are flared at each end and connected with flare nuts 3 3 Flaring Procedure with a Flare Tool 1 Cut the copper tube to the required length with a tube cutter It is recommended to cut approx 12 to 20 30 to 50 cm longer than the tubing length you estimate 2 Remove burrs at the end of the copper tube with a tube reamer or file This process is important and should be done carefully to make a good flare Fig 8 13 Before NNSNNNNNNNNNNNNY Deburring Fig 8 After When reaming hold the tube end d
27. This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 25 5 1 2 Temperature Charts CMH2472 Outdoor Unit CMH2472 Indoor Unit KMHS0772 X 1 E Cooling Characteristics RH 46 Indoor fan speed High fan 230V 60Hz 1 Low pressure performance chart 29 5 188 Hi fan 8 1 3 t f oCY 5 cy oa 66 7 7 e a 2 oC a 174 k 21 12 AN e 5 pO V 19 o l 2 160 1 0 a z 1 1 1 1 146 1 0 77 86 95 104 25 30 35 40 Outdoor air temperature F C 2 Operating current performance chart 5 T T t 94 3 5 o eck S ait temp p 8 eor Qro T5 24 C I I 77 86 95 104 25 30 35 40 Outdoor air temperature F C 3 Indoor discharge air performance chart
28. x wos AO 57 2 14 S 104 40 d d 4t 2 5 CN S 53 6 12 S 95 35 o gt 3 8 o 5 50 0 10 5 86 30 g 46 4 8 7 77 25 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C NOTE This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 30 5 1 3 Temperature Charts CMH3172 Outdoor Unit CMH3172 Indoor Unit KMHS0772 X 1 lll Cooling Characteristics lll
29. 9 52 12 19 32 13 19 32 14 17 32 29 1 8 740 _ 23 32 4 7 1 ea T oon 2 15 16 1 13 16 2 1 16 Fig 6a 2 CMH2472 23 15 16 5 11 32 415 32 35 7 16 900 2 29 32 Service valve on narrow tube side Outer diameter 1 4 6 35 Service valve on wide tube side Outer diameter 3 8 9 52 12 19 32 13 19 32 14 17 32 29 1 8 740 2 15 16 H 2 1 32 4 1 2 Service valve on wide tube side Outer diameter 1 2 12 70 HHSHHHSH 23 32 4 7 16 1 13 16 2 27 32 5 29 32 1 rx 23 4 oe 2 13 32 Fig 6b 3 CMH3172 23 15 16 5 11 32 A 35 7 16 900 2 29 32 Service valve on narrow tube side Outer diameter 1 4 6 35 Service valve on wide tube side Outer diameter 3 8 9 52 12 19 32 13 19 32 14 17 32 am 35 1 32 890 2 3 4 2 15 16 _ 23 32
30. C 2 Operating current performance chart 2 Operating current performance chart 10 6 r r 9 De i T 8 BEKO 25 C 5 ET 2 5 oF 30 E 7 00 8 88 2 RY M 2 goot ae gt ax 8 FT s 4 99 T 2 5 Ter V 1 1 4 l 3 3 77 86 95 104 23 32 41 50 59 68 77 25 30 85 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 Qiorn Dm Hien gt 68 0 20 131 55 A i A iso 9 64 9 122 50 KK 6 4 18 I mo EX 4 0 KO o of 60 8 16 t door ait temp 86 3 113 45 s Res 11 xl 2 2 5 57 2 14 X 104 40 lee ero a 5 53 6 12 5 95 35 i E 50 0 10 5 86 30 1 o 3 l 5 46 4 8 77 25 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C NOTE This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The pe
31. DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The Values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit KMHS0972 3units Outdoor Unit CMH2472 tunit 2 Rating conditions are Cooling Indoor air temp 80 F D B 67 F W B Heating Indoor air temp 70 F D B Outdoor air temp 95 F D B 75 F W B Outdoor air temp 47 F D B 43 F W B Outdoor Unit CMH3172 Indoor Unit KMHS0972 x 4 Type 4 Room Multi Outdoor Unit Number of Operatable Indoor Units Performance Heating Total Capacity BTU h 30 600 9 800 to 30 600 32 000 11 600 to 32 000 kW 9 00 2 90to9 00 9 40 3 40 to 9 40 Sensible Capacity BTU h 25 800 Latent Capacity BTU h 4 800 Air Circulation High ft min m3 h 1 942 3 300 Electrical Rating Heating 2 350 Power Factor RER gt 7 Features Outdoor Unit Contra Far SES Compressor Refrigerant Amount charged at shipment Refrigerant Control Operation Sound High Coolest 25 Refrigerant Tubing Connections Max allowable tubing length per unit Refrigerant Narrow iube eh nm Tube Diameter Wide tube inch mm Dimensions amp Weight Outdoor Unit Unit Dimensions inch 35 1 32 X 35 7 16 X 12 19 32 Height X Width X Depth mm 890 X 900 x 320 Height X Width X Depth mm 1 010 X 1 032 X 413 Weight Net I
32. F the time is 48 minutes 2 After HEAT operation begins the temperature of the outdoor heat exchanger is at or below the L2 line for 120 minutes The 4 way valve remains ON during defrost The outdoor fan stops and the solenoid valve turns ON allowing the refrigerant to bypass the indoor unit The operating frequency during defrost is 80 Hz Frequency is lowered if the current peak cut off function is activated The maximum length of a single defrost operation is 12 minutes For the outdoor heat exchanger temperature conditions for ending defrost refer to Table 1 Defrost release Indoor fan turns ON After 10 seconds the solenoid valve for hot gas bypass turns OFF When the cold air feel has disappeared the indoor fan starts and gradually increases speed until it reaches the set speed STOP Clean defrost Defrost is performed when the outdoor unit is stopped and the temperature of the outdoor unit coil is at or below the L1 line Refer to Fig 1 All indicator lamps turn OFF The indoor and outdoor units stop Operation is restarted within 4 hours only when AUTO mode is selected with the remote controller Starts operating in the same operating mode HEAT and with the same temperature settings as before operation was stopped Within 4 hours after operation was stopped it is assumed that there has been no significant change in the indoor and outdoor
33. SHC 10 270 SHC 14 150 SHC SHC SHC PE 35 020 33 730 32 320 31 860 24 020 17 350 21 7 17 19 SHC 36 040 34 730 33 270 32 940 24 130 17 390 10 720 5 240 SHC 9 350 SHC 13 240 SHC 22 840 22 380 21 920 17 350 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 59 63 67 71 1 Rating conditions Indoor Unit Entering Air Temp 80 F 26 7 C 67 F 19 4 C W B Outdoor Ambient Temp 95 F 35 C D B 2 Above data does not take Freeze Prevention Protection during cooling operation into account For this reason the value may vary from the actual cooling characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 38 5 3 Heating Capacity Outdoor Unit CMH1972 Indoor Unit KMHS0972 3 Power Supply 230V Single Phase 60Hz lt Heating Capacity gt RATING CAPACITY 24 800 BTU h AIR FLOW RATE 847 CFM OUTDOOR INDOOR ENT TEMP F C AMBIENT TEMP F C 60 65 70 75 80 15 6 18 3 21 1 23 9 26 7 w 0 17 8 TH 13 820 13 790 13 750 13 710 13 660 N 18 23 5 ol 28 2 D n TH Total Heating Capacity BTU h 33 0 38 3 wo 99 43 6 o 48 8 NOTE 1 Rating conditions 4 Indoor Unit Entering Air Temp 70 F 21 1 C D B Outdoor Ambient Temp 47 F 8 3 C
34. Ss oH HoSsduidWoo HOLO3NNOO d o 8 8FA2 5257 89400 1 44 7 FUNCTIONS 7 1 Explanation of Functions The numerical values such as temperature frequency time and current in parentheses are an example of CMH3172 and the values are different from the other models Control conditions Unit operation Explanation INITIAL Breaker is ON The ON OFF operation button on the remote controller is pressed If automatic operation mode has been selected with the remote controller operation begins in HEAT SENSOR DRY or COOL mode depending on the room temperature and outdoor temperature at the time operation starts Power is supplied to the indoor and outdoor unit control circuits however the unit remains stopped Positioning of the outdoor unit electric expansion valve is performed This applies in the case of automatic HEAT COOL operation V Depending on the operational mode refer to the HEAT SENSOR DRY or COOL item The ON OFF operation button on the remote controller is pressed Operation lamp illuminates Indoor fan is stopped to prevent cold air from being emitted Outdoor unit begins operating after forced stop is canceled The unit is forced to stop for 3 minutes after the power is turned ON or 3 minutes after the compressor stops in order to protect the compressor The frequency is increased at the rate of 1 Hz every 0 5 seconds When the indoor coil temper
35. gt ga 88 t t eC 2 Di 870 8 qs v A o 434 1 xem A 1 2 door it emo T 3 0 0 a 19 T oO Zo 2 eT 5 Lear CE QA 5 S 79 F 2 362 11 8 2 5 a 1 1 a 3 4 5 146 i 290 1 0 77 86 95 104 2 0 53 32 41 50 59 68 77 25 30 35 40 C5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart 8 6 l l 2 T C l l 2 y EN Se 8 i E indoor ail Sd ia g IN PIC 2 907 El lioct ex E 4 1 MM Ed de ei 47 1 e GEO 5 j 7 86 95 104 23 32 41 50 59 68 7 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 68 0 20 131 55 Lx cy 8 644 18 3 122 50 S S 60 8016 113045 2 2 57 2 14 4 104 40 D 53 6 12 2 95 35 50 0 10 5 86 30 Q Q 3 3 46 4 8 77 25 77 86 95 104 23 32 41 50 59 68 7 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C NOTE This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each perfo
36. m m LH C43 m 5 l cy z a THM a 6 T HOLOANNOO dz2 for AWD 9 tis 9 tA o 1HM zx ze o o 134 olol 2 Jr Gs afa eje 2 _ 5uo g 5 ce 1HM z HE2 w 2 2 S LHM 9 JA g ug on o Tog gx S 2o a o ze 8 EH 1H 31 518 si E lt lt a d IHM ok 5 1HM 5 wo AH9 info Q o 0 Bz z s n8 gt asalana py Set 134 ale 2 z c z ES HOLO3NNOO d2 wi aja aad 4 9uo l lt Ez we 3 9 e E 89 8 efo aja 94 EE ry o LR uz a a ZZ mlo 13A oo 5 HOLO3NNOO d 8 S Zr euo4 g o L HOLSINHAHL amp HOLSINHAHL NO THA DE EEH Z x BA z o 13A 9 13 false lt 13 2 ET a 13 DE 134 a 8 HOLSINHAHL HOLSIWHSHL MO 8 YHOLSINYSHL NG HOLSIINH3H NV 2 viw TSA TA DE zofo 13A zz TA ee 134 T3A ajaj 734 TAA HOLSIINH3H L MG HOLSINHAHL MV HO1O3NNOO d4 H tr HOLSINUSHL b m Hood1no FARM 5 wa Iv Nug 2 14a joje r rg z THA jaja BA X18 anod VES Haay HOLIMS HOLSINHAHL JE 3unsS3ud HOIH 109 3409 3 e lol alia 6 a ma DE ma 2 5 dE LHM HM E 045 Lane x s 54 HOLSINHAHL EH
37. o g 8 ne LA E 2 goo OE 2 Des ET 21 o Q ok a 9 CT l 2 yay 5 re l 1 6 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 amp 68 0 20 uw 181 55 g g 3 64 4 18 g 12260 ES S 5 oce 2 Q 13 60 8 16 E 113 45 eme uso o x any QE L xad02 T FRO 57 2 14 S 104 40 eae 8 ER 8 53 6 12 5 95 35 5 5 50 0 10 5 86 30 8 8 c 46 4 8 77 25 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C NOTE This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 29 Outdoor Unit CMH2472 Indoor Unit KMHS2472 X 1
38. 3 86 95 104 23 32 41 50 59 68 7 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 68 0 20 13165 i CE 64 4 18 9 122 50 73 F 23 5 E ndoot ail 70 QUO 8 60 8 16 amp 113 45 9 8 57 2 14 4 104 40 o o 5 5 53 6 12 8 95 35 8 8 50 0 10 5 86 30 Q Q 3 3 46 4 8 77 25 77 86 95 104 23 32 41 50 59 68 7 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C NOTE This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 23 Outdoor Unit CMH1972 Indoor Unit KMHS1272 X 1
39. 32 ES V 3 oe precem F 9 M IE o s 9 1 j 1 D l m EE zm EE SS tS t y 35 7 16 900 2 1 5 16 T Wide tube service valve dia 3 8 9 52 x 3 4 Narrow tube service valve dia 1 4 6 35 x 4 eU Wide tube service valve ki dia 1 2 12 70 x 1 5 z LIE a e n 2 3 D 1 e a j F Ah ds S 1 1 b e EI ai eu Fall g 3 e N 1 N Y 2 1 32 4 1 2 1 13 16 8 gt 2 1 16 2 13 32 ee Unit inch mm 17 Outdoor Unit CMH3172 23 15 16 5 11 32 gt 15 32 y 11 17 32 Ey RS A f x nd a i VT l Lt HS 1 S 889 8 ofS 9 a gt 1 1 l m e _ M x Yo y i 35 7 16 900 2 15 16 k 1 1 1 1 i Wide tube service valve dia 3 8 9 52 x 2 1 1 1 1 Narrow tube service valve dia 1 4 6 35 x 4 1 1 8 Wide tube service valve i dia 1 2 12 70 x 2 1 1 2 LE ns I s E Q 5 e fa S 8 a h FS Y 2 1 32 4 1 2 1 13 16 2 14
40. 8 3 2 Checking the defrost operation e Using forced defrost operation to check this function Work procedure Check items unit operation Connect a dummy resistor of 39 k ohm to the outdoor coil temperature sensor connector 55 E Non stop defrost 30sec Indoor fan _ Setting LL Stop 80 Hz 1 Le L 1 1 1 1 CM ON Solenoid valve i 5 sec for hot gas bypass OFF Outdoor fan ON 1 A Defrost start Release The maximum length of defrost operation is 12 minutes Defrost can also be released based on the below conditions for the outdoor heat exchanger sensor Less than 2 minutes Not released 2 minutes or more 57 2 F or higher 1 1 However the condition is 68 F or higher when the outdoor air temperature is below 32 F 8 4 Trouble Diagnosis of Each Part 8 4 1 Problems of Each Part and Inspection Points For details about the inspection points refer to the Inspection Points for Each Part Indoor unit Outdoor unit Others Problems No of Inspection Points for Each part Inspection points The compressor stops on occasion The outdoor air temperature is high however defrost operation occurs The electric expansion valve does Defrost operation does not occur not operate Indoor unit does not operate Operation lamp does not illuminate Indoor fan dose not
41. 980 24 490 15 980 25 560 24 700 23 760 23 200 22 080 16 380 12 330 8 900 15 41 11 990 18 500 15 070 21 41 16 380 24 500 16 380 26 610 25 730 24 770 24 270 22 840 16 730 8 780 5 470 TC 11 810 8 390 14 900 11 470 17 810 14 560 0 560 20 90 16 730 27 510 26 620 25 640 25 210 23 240 17 000 8 210 4 960 11 300 8 210 14 390 11 130 17 300 14 040 TC Total Cooling Capacity BTU h SHC Sensible Heat Capacity BTU h 1 Rating conditions Indoor Unit Entering Air Temp 80 F 26 7 C D B 67 F 19 4 C W B Outdoor Ambient Temp 95 F 35 C D B 2 Above data does not take Freeze Prevention Protection during cooling operation into account For this reason the value may vary from the actual cooling characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 37 Outdoor Unit CMH3172 Indoor Unit KMHS0972 4 Power Supply 230V Single Phase 60Hz lt Cooling Capacity gt RATING CAPACITY 30 600 BTU h AIR FLOW RATE 1 177 CFM INDOOR OUTDOOR ENT TEMP F C AMBIENT TEMP F C C W B 65 75 85 95 105 115 E Ea E 555 25 470 16 600 aso zo ee 1 600 010 31 170 16 690 31 170 16 690 32 490 31 280 29 960 29 310 23 400 16 970 17 2 21 010 14 610 24 900 16 970 29 010 16 970 16 970 NB TC 33 790 32 540 31 170 30 600 23 770 17 200 19 4 32 490 16 970
42. A h R 2 60 8 1 6 hdd Tair temp 861 Et 2 113 45 RSS ARS 2 2 NS 57 2 14 X 104 40 g a 3A 2 5 53 6 12 5 95 35 75 F 24 1 2 50 0 10 5 86 30 1 o 3 l 5 46 4 8 77 25 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C NOTE This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 24 Outdoor Unit CMH1972 Indoor Unit KMHS1872 X 1 lll Cooling Characte
43. C Safety Device Type Internal Controller Over Current Protection Over Heat Protection Run Capacitor VAC Heat Exchanger Coil Coil Aluminum Plate Fin Copper Tube Rows FINS perinen Face Area ft m 6 40 0 595 DATA SUBJECT TO CHANGE WITHOUT NOTICE Outdoor Unit CMH2472 Control PCB CB CMH2472 Control Circuit Fuse 250V 25A Compressor DC Twin Rotary Hermetic Compressor Model Nominal Output 5KD240XAB21 1 700W Compressor Oil Amount Pints cc FV508S 1 91 900 Coil Resistance Ambient Temp 68 F 20 C Ohm U V 0 720 V W 0 708 W U 0 726 Safety Device CT Peak current cut off control Yes Compressor Discharge Temp Control Yes Yes Operation cut off control in abnormal ambient Temp o Yes SES Overload Relay Operation Temp Open 239 F 115 C Close 212 F 100 C Run Capacitor Mim m s trae coco AT ame i I E Propeller Q ty Dia inch mm 1 D18 1 8 D460 Nominal Output S Coil Resistance Ambient Temp 68 F 20 C Safety Device Type Internal Controller Over Current Protection Over Heat Protection Run Capacitor VAC Heat Exchanger Coil Coil Aluminum Plate Fin Copper Tube Rows FINS perinen Face Area ft m 6 40 0 595 DATA SUBJECT TO CHANGE WITHOUT NOTICE Outdoor Unit CMH3172 Control PCB CB CMH3172 Control Circuit Fuse 250V 25A Compressor DC Twin Rotary Hermetic C
44. Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart 2G 28 5 SE 174 Sd 82 02 ge 22 EE 9 g 8 8 0 8 8 2 146 oc race 3 3 09 Indoor air temp 86 F 8020 2 362 z 27 C 2 5 1 j c 75 F 24 0 g as 20 g 08 9 20 E ni 90 218 0 6 77 86 95 104 15 23 32 41 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart 1 8 o 5 je E 57 ZEN 5 fe 5 gt 3 4 3 o D Le 2 2 wy NI S 6 291 amp amp 5 4 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 o US 68 0 20 131 55 ECS o o e e E AS LS 2 64 4 18 12260 ND d amp 5 60 8 16 E 113 45 5 5 F 57 2 14 H 104 40 53 6 12 95 35 Q Q TD 50 0 10 3 86 30 46 4 8 77 25 77 86 95 104 23 32 41 50 59 68 77 25 80 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C NOTE This performance chart shows operat
45. High fan 230V 60Hz 1 Low pressure performance chart psig MPaG Low pressure at wide tube service valve Operating current A T T L 1 2 146 1 0 118 g 0 8 indoor airtemp 86 F 30 C tgo F 27 C 90 75 F 24 C 0 6 77 86 95 104 25 30 35 40 Outdoor air temperature F C 2 Operating current performance chart 12 Lo fan Hi fan oC XN 11 we i eS t t Ta wx c 10 ES J AE e 49 9 8 77 86 95 104 25 30 35 40 Outdoor air temperature F C 3 Indoor discharge air performance chart 268 re F A 60 ir temperatu 57 53 50 Indoor discharge ai 0 20 A 18 8 16 2 14 6 12 0 10 NOTE This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type 86 95 104 30 35 40 Outdoor air temperature F C lll Heating Characteristics RH 85 Indoor fan speed High fan 230V 60Hz 1 High pressure performance chart
46. Outdoor Unit E For solid core wiring or F cable 1 Cut the wire end with a cutting pliers then strip the insulation to expose the solid wire about 15 16 25 mm Fig 27 2 Using a screwdriver remove the terminal screw s on the terminal plate 3 Using the pliers bend the solid wire to form a loop suitable for the terminal screw 4 Shape the loop wire properly place it on the termi nal plate and fix it securely with the removed termi nal screw using a screwdriver Bi For stranded wiring 1 Cut the wire end with a cutting pliers then strip the insulation to expose the stranded wiring about 3 8 10 mm and tightly twist the wire ends Figs 28 and 29 2 Using a screwdriver remove the terminal screw s on the terminal plate 3 Using a ring connector fastener or pliers securely clamp each stripped wire end with a ring connector Fig 28 4 Place the ring connector wire and replace and tighten the removed terminal screw using a screw driver Fig 30 21 9 32 7 mm ACTUAL STRIP SIZE SIZE Fig 26 E Solid wire i5 Loop 91 N 2 7 Insulation Fig 27 Stranded wire E o Ring fo connector e 2 Fig 28 Twist wire ends a Fig 29 Special washer Screw 5 Screw and Ring connector special washer T A Wire Terminal plate Ring 1 connector EZ 5 5 Wi
47. Store excess wiring inside the cabinet 4 When connections are completed check that all con nections are correct as shown in the wiring system diagram on panel side 5 Be sure to ground the unit according to your local codes 6 Test Run Performing a test run e Refer to the test run procedures in the indoor unit installation manual e Perform the test run separately for each connected indoor unit If 2 units are operated simultaneously it is not possible to correctly check for errors in tubing and wiring e If the room temperature is 59 F 15 C or below it may not be possible to check for tubing errors with cooling operation If this occurs perform heating operation for each unit individually and check that warm air is discharged from each unit If there is cold air mixed in with the warm air check the tubing connections again Checking tubing and wiring Perform the test run and check that operation is normal If there is an error in tubing or wiring the refrigerant may flow to indoor unit B when indoor unit A is operated for example e Stop operation immediately if there is an error in tubing or wiring Turn the power breaker to OFF and check whether the inter unit cables are connected incorrectly or whether the narrow tubes A and B are connected in reverse Correct the connections e If there is an error in tubing pump down must be per formed Be sure to perform pump down After making correct
48. W B 67 F D B Heating Maximum 80 F D B 67 F W B 75 F D B 65 F W B Minimum D B 0 F D B 2 SPECIFICATIONS 2 1 Unit Specifications Outdoor Unit CMH1972 Indoor Unit KMHS0972 X 3 Type 3 Room Multi Outdoor Unit Number of Operatable Indoor Units Performance Heating Total Capacity BTU h 19 100 9 800to 19 100 24 800 11 600 to 24 800 kw 5 60 2 90to5 60 7 30 3 40 to 7 30 Sensible Capacity BTU h 16 300 Latent Capacity BTU h 2 800 Air Circulation High ft min m3 h 1 707 2 900 1 707 2 900 Electrical Rating Heating 77 1 735 Power Factor BE E a _ gt Jj Features Outdoor Unit SEN Compressor Refrigerant Amount charged at shipment Refrigerant Control Operation Sound igh Cool Hea E Refrigerant Tubing Connections Max allowable tubing length per unit Refrigerant Namow iube mn nm Tube Diameter Wide tube inch mm Dimensions amp Weight Outdoor Unit Unit Dimensions inch 29 1 8 X 35 7 16 X 12 19 32 Height X Width X Depth mm 740 X 900 X 320 Height X Width X Depth mm 860 X 1 032 X 413 Weight Net Ib kg Shipping Ib kg Shipping Volume cu ft m DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The Values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combi
49. X Width X Depth mm 1 010 X 1 032 X 413 Weight Net Ib kg Shipping Ib kg Shipping Volume cu ft DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The Values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit KMHS0972 4units Outdoor Unit CMH3172 tunit 2 Rating conditions are Cooling Indoor air temp 80 F D B 67 F W B Heating Indoor air temp 70 F D B Outdoor air temp 95 F D B 75 F W B Outdoor air temp 47 F D B 43 F W B 11 2 2 Major Component Specifications 2 2 1 Outdoor Unit Outdoor Unit CMH1972 Control PCB CB CMH1972 Control Circuit Fuse 250V 25A Compressor DC Twin Rotary Hermetic Compressor Model Nominal Output 5KD240XAB21 1 700W Compressor Oil Amount Pints cc FV508S 1 91 900 Coil Resistance Ambient Temp 68 F 20 C Ohm U V 0 720 V W 0 708 W U 0 726 Safety Device CT Peak current cut off control Yes Compressor Discharge Temp Control Yes Yes Operation cut off control in abnormal ambient Temp o Yes SES Overload Relay Operation Temp Open 239 F 115 C Close 212 F 100 C Run Capacitor Mim m s trae coco AT ame i I E Propeller Q ty Dia inch mm 1 D18 1 8 D460 Nominal Output S Coil Resistance Ambient Temp 68 F 20
50. also be included and taped together as 1 bundle with the tubing 2 Wrap the armoring tape from the bottom of the outdoor unit to the top of the tubing where it enters the wall As you wrap the tubing overlap half of each previous tape turn Fig 18 3 Clamp the tubing bundle to wall using 1 clamp approx every 47 120 cm Do not wind the armoring tape too tightly since this will decrease the heat insulation effect Also be sure the con densation drain hose splits away from the bundle and drips clear of the unit and the tubing 3 8 Finishing the Installation After finishing insulating and taping over the tubing use sealing putty to seal off the hole in the wall to prevent rain and draft from entering Fig 19 15 Torque wrench Spanner Indoor unit Outdoor unit Fig 15 DET J Insulation Fig 16 Insulation Thickness Min min 5 16 5 16 8 mm 8 mm Fig 17 Apply putty here Tubing Fig 19 4 Air Purging Air and moisture remaining in the refrigerant system have undesirable effects as indicated below Therefore they must be purged completely Service valve on narrow pressure in the system rises Manifold gauge operating current rises special for R410A M Service S iah e cooling efficiency drops valve on High Tn ii ide tube e moisture the air may freeze and block capillary tubing 89 adapte
51. any wen circumstances Otherwise the air conditioner may not run properly and trouble may occur Example When 3 indoor units are connected at 230V If the following holds true e Rated cooling capacity of CMH1972 outdoor unit C 19100 BTU h e Rated cooling capacity of indoor units K1 K2 BTU h Then C x 2 200 K2 19100 x 2 7500 11900 17500 38200 2 36900 It is therefore possible to connect units with respective capacities of 7500 11900 17500 However since this combination is not found in the 3 room operation column of Table 1 operating all these units concurrently may result in trouble At a time like this shut down at least one of the 3 indoor units to match one of the combinations found in the 2 room operation column of Table 1 at 208V If the following holds true e Rated cooling capacity of CMH1972 outdoor unit C219100 BTU h e Rated cooling capacity of indoor units K1 K2 BTU h Then C x 2 200 K1 K2 19100 x 2 7500 11900 17500 38200 36900 It is therefore possible to connect units with respective capacities of 7500 11900 17500 However since this combination is not found in the 3 room operation column of Table 2 operating all these units concurrently may result in trouble At a time like this shut down at least one of the 3 indoor units to match one of the combinations found in the 2 room operation column of Table 2 Ne Be sure to
52. check for the diagram on the 10 Drill indoor unit 11 Tube cutter 12 Tube flaring tool 1 1 ee not supplied 13 Torque wrench z 14 Adjustable wrench 2 Vend nead SENAVE 15 Reamer for deburring Suc KONG OP 16 Vacuum pump For R410A pe meurs 17 Manifold valve 1 2 Accessories Supplied with Unit Table 1 Parts Figure Q ty Parts Figure Q ty Parts Figure Q ty CMH2472 1 H h VA 1 Cushi bb D 4 Reducer ex wrenc ushion rubber 1 2 x 3 8 en DES Labels for inter unit Reducer Packed in the outdoor unit CS ane AIBICID 4 each x 1 2 8980 CMH1972 1 1 3 Optional Copper Tubing Kit 2 Foamed polyethylene insulation for the specified Copper tubing for connecting the outdoor unit to the copper ioes as required to precise length of tubing indoor unit is available in kits which contain the narrow and wide tubing fittings and insulation Consult your Diano e Omm nearest sales outlet or A C workshop 3 Use insulated copper wire for field wiring Wire size varies with the total length of wiring 1 4 Type of Copper Tube and Insulation Material Refer to 5 Wiring Instructions for details If you wish to purchase these materials separately from PRESS Check local electrical codes 1 Deoxidized annealed copper tube for refrigerant tub and regulations before ing as detail
53. circuit board Power Lamp red turns OFF If the outdoor control circuit board is normal approximately 180 seconds will be required for the charge to dissipate However allow at least 30 minutes for the charge to dissipate if it is thought there might be trouble with the outdoor control circuit board For example if the outdoor control circuit board fuse has blown approximately 30 minutes will be required to discharge the high capacity electrolytic capacitors 53 8 2 Trouble Diagnosis by Error Monitor Lamps To prevent electric shock do not inspect or repair until the Power Lamp on the P C Board is turned off 8 2 1 Location of the Error Monitor Lamps Remove the top plate of outdoor unit and the cover of Electrical Component Box The Power Lamp and Error Monitor Lamps are located on the P C Board of Electrical Component Box Fig 1 Heat Exchanger Rear side P C Board of Electrical Component Box Error Monitor Lamps Power Lamp ERRO ERR1 ERR2 EeRR3 Fig 1 View from top Front side 8 2 2 Display of the Error Monitor Lamps If a protective device has activated or there is a sensor failure in the outdoor unit the 4 error monitor lamps on the outdoor control circuit board will indicate the nature of the trouble Error Monitor Lamp Q ON X OFF Error Contents ERRO ERR1 ERR2 ERR3 O x x Sensor for compressor discha
54. operate the air conditioning system only when 2 or more indoor units have been installed If operated with only a single unit installed the returning fluid to the compressor may cause a malfunction Pub Ol 85264180821004 SANYO 2008 lt Combinations of operatable indoor units gt Voltage Rating 230V 60Hz CMH1972 Rated cooling capacity at 230V 19100 BTU h 7500 KMHS0772 9000 KMHS0972 11900 KMHS1272 17500 KMHS1872 Table 1 Indoor Unit Capacity BTU h COOLING HEATING Total Performance Room Room Room Total Performance Capacity Min Max A B C Capacity Min Max 7500 4700 8800 8500 8500 6100 14600 Single room 9000 4700 10900 12200 12200 6100 16000 Operation 11900 5100 12200 14300 14300 6400 16700 17500 5400 19100 20400 20400 6800 24800 Indoor Unit Combination 2 room Operation 3 room Operation n n e The table lists the wall mounted type of indoor units as representative models Voltage Rating 208V 60Hz CMH1972 OTE Rated cooling capacity at 208V 19100 BTU h 7500 KMHS0772 9000 KMHS0972 11900 KMHS1272 17500 KMHS1872 Table 2 Indoor Unit Capacity BTU h Indoor Unit Combination COOLING HEATING Total Performance Room Room Room Total Performance C Capa
55. possible to connect 4 units with respective capacities of 7500 7500 11900 24200 However since this combination is not found in the 4 room operation column of Table 1 operating all these units concurrently may result in trouble At a time like this shut down at least one of the 4 indoor units to match one of the combinations found in the 3 room operation column of Table 1 at 208V If the following holds true e Rated cooling capacity of CMH3172 outdoor unit C228600 BTU h e Rated cooling capacity of indoor units K1 K2 BTU h Then C x 2 200 K2 28600 x 2 7500 7500 11900 24200 57200 51100 It is therefore possible to connect 4 units with respective capacities of 7500 7500 11900 24200 However since this combination is not found in the 4 room operation column of Table 2 operating all these units concurrently may result in trouble At a time like this shut down at least one of the 4 indoor units to match one of the combinations found in the 3 room operation column of Table 2 Ne Be sure to operate the air conditioning system only when 2 or more indoor units have been installed If operated with only a single unit installed the returning fluid to the compressor may cause a malfunction Pub Ol 85264180805004 SANYO 2008 lt Combinations of operatable indoor units gt Voltage Rating 230V 60Hz CMH3172 7500 50772 Rated cooling capac
56. remote controller Starts operating in the same operating mode COOL and with the same temperature settings as before operation was stopped Within 4 hours after operation was stopped it is assumed that there has been no significant change in the indoor and outdoor temperatures and the previous conditions COOL are stored Operation starts after 4 hours or more have passed New operating mode is determined based on the temperature conditions at the time the ON OFF operation button is pressed 47 Frequency control B senconds Outdoor air temperature is below 32 F Outdoor air temperature is 32 F or higher 120 seconds 60 seconds 60 seconds 30 seconds 1 f fluctuation fan Control conditions 60 seconds 180 seconds Table 2 Unit operation 30 seconds 90 seconds Explanation SENSOR DRY The ON OFF operation button on the remote controller is pressed The room temperature reaches the desired temperature and there is no need for further cooling The room temperature is 59 F or higher and is slightly too cold The operation lamp illuminates The indoor fan operates at the set fan speed The outdoor unit stops The outdoor unit does not operate for 3 minutes even after the breaker is turned ON The outdoor unit starts Compressor and the outdoor fan start The frequency is increased at the
57. temperatures and the previous conditions HEAT are stored Operation starts after 4 hours or more have passed New operation begins based on the temperature conditions at the time the ON OFF button is pressed 46 Outdoor heat exchanger temperature F L2 L1 zT 4 0 Temperature of releasing Defrost operation time Less than 2 minutes 2 minutes or more Outdoor air Heat exchanger Control conditions 21 2 19 4 temperature F temperature for releasing defrosting Unit operation No releasing 57 2 F or higher 1 1 The temperature for releasing of defrosting is 68 F or higher when the outdoor air temperature is less than 32 F Table 1 Explanation The ON OFF operation button on the remote controller is pressed The operation lamp illuminates The indoor fan operates at the set fan speed The outdoor unit stops The outdoor unit does not operate for 3 minutes even after the breaker is turned ON The outdoor unit starts Compressor and the outdoor fan start The frequency is increased at the rate of 0 5 Hz every 1 seconds When the frequency reaches o Hz frequency increases are stopped for a period of 8 seconds Refer to Table 2 This is in order to stabilize the return of oil to the compressor The frequency then increases If the indoor and outdoor temperatures are high the curren
58. the manifold gauge to the charging port at the valve on the wide tube side of tube D Purge the air from the charging hose Refer to Fig 23 3 Perform cooling operation or forced cooling operation When the pressure at the low pressure side is 0 15 0 2 MPa 0 5 1 kg cm G fully close the spindles at the valves on the wide tube side of tubes A B C and D and immediately stop operation Refer to Fig 23 In the winter the outdoor unit may stop after 5 10 minutes of operation This is in order to protect the indoor unit heat exchanger from freezing and does not indicate a problem 4 Disconnect the manifold gauge and the inter unit tubes and attach the caps and flare nuts At this point pump down is com pleted If the caps and flare nuts are not reattached there is the danger of gas leakage Refer to Fig 24 If pump down is not possible If the A C cannot be operated because of a malfunction or other cause use a refrigerant recovery device to recover the refrigerant 18 Narrow tube side Charging port Wide tube side After disconnecting the inter unit tubes attach the flare nuts with flare bonnets 5 Wiring Instructions 5 1 General Precautions on Wiring 1 Before wiring confirm the rated voltage of the unit as shown on its nameplate then carry out the wiring closely following the wiring diagram 2 Provide a power outlet to be used exclusively for each unit with a power supply
59. 08V z E 6 e ei 5 S Grounding gt Disconnect ine Q o Switch Field supply 230 208V zi E o l B zsoosv 8 H 5 e Z 8 2 z E OH o ao mum E SE SI 230 08V B 8 Oc 3 5 Grounding line Terminal 29 2 A Fig 25a ANa To avoid the risk of electric shock each air conditioner unit must be grounded e For the installation of a grounding device please observe local electrical codes Grounding is necessary especially for units using inverter circuits in order to release charged electricity and electrical noise caused by high tension Otherwise electrical shock may occur e Place a dedicated ground more than 7 2 m away from other grounds and do not have it shared with other electric appliances 20 um Disconnect switch may be required by national or local codes Always comply with national and local code requirements 4 indoor units with CMH2472 CMH3172 Disconnect switch Field supply 5 5 LoTo 20208 OUTDOOR UNIT 2s 230208v i M gt ore Terminal 12P A 230 208V 1 ale Grounding line lt esee LU LS Disconnect z switch
60. 10A refrigerant is exposed to fire Therefore be sure to provide ample ventilation during installation work e Caution in case of R410A leak Check for possible leak points with the special leak detector for R410A If a leak occurs inside the room immediately provide thorough ventilation 62 9 3 Tools Specifically for R410A e For servicing use the following tools for R410A Tool Distinction Tool Name Gauge manifold Charging hose Gas leak detector Refrigerant cylinder Charging cylinder Refrigerant recovery unit Tools specifically for R410A Vacuum pump with anti reverse flow 1 Solenoid valve installed type which prevents oil from flowing back into the unit when the power is off is recommended Vacuum pump 2 can be used if the following adapter is attached Vacuum pump adapter reverse flow prevention adapter 3 Solenoid valve installed adapter attached to a conventional vacuum pump Electronic scale for charging refrigerant Flare tool Bender Tools which can be com Torque wrench monly used for R22 R407C and R410A Cutter reamer Welding tool nitrogen gas cylinder Doing so will cause malfunction of the unit Nc e The above tools specifically for R410A must not be used for R22 and R407C e For the above vacuum pump 1 2 and vacuum pump adapter 3 those for R22 type units can be used for R410A type However they must be used exclusively for R410A and never alternat
61. 2 5 86 30 8 77 25 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6t 7 5m If the tubing length is different the performance chart will vary 26 Outdoor Unit CMH2472 Indoor Unit KMHS0972 X 1 E Cooling Characteristics lll Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart gt 188 itan gt 82 13 82 85 22 l l
62. 410A SPECIAL PRECAUTIONS WHEN SERVICING UNIT 9 1 Characteristics of New Refrigerant R410A 9 1 1 What is New Refrigerant R410A R410A is a new refrigerant that contains two types of pseudo non azeotropic refrigerant mixture Its refrigeration capacity and energy efficiency are about the same level as the conventional refrigerant R22 9 1 2 Components mixing proportions HFC32 50 HFC125 50 9 1 3 Characteristics Less toxic more chemically stable refrigerant The composition of refrigerant R410A changes whether it is in a gaseous phase or liquid phase Thus when there is a refrigerant leak the basic performance of the air conditioner may be degraded because of a change in composition of the remaining refrigerant Therefore do not add new refrigerant Instead recover the remaining refrigerant with the refrigerant recovery unit Then after evacuation totally recharge the specified amount of refrigerant with the new refrigerant at its normal mixed composition state in liquid phase When refrigerant R410A is used the composition will differ depending on whether it is in gaseous or liquid phase and the basic performance of the air conditioner will be degraded if it is charged while the refrigerant is in gaseous state Thus always charge the refrigerant while it is in liquid phase Nes Ether type oil is used for compressor oil for R410A type units which is different from the mineral oil used for R22 Thus more atte
63. 500 4000 8800 8500 8500 6100 14600 9000 4400 10900 12200 12200 6100 16000 11900 4700 12200 14300 14300 6400 17400 17500 5100 19700 20400 20400 6800 26600 24200 5400 24800 29000 29000 6800 30000 Indoor Unit Combination Single room Operation 2 room Operation 3 room Operation 4 room Operation H a n F H F n EE l ete TT e The table lists the wall mounted type of indoor units as representative models SANYO Commercial Solutions A Division of SANYO North America Corporation Cornerstone Business Park 1062 Thorndale Avenue Bensenville IL 60106 U S A Sanyo Canada Inc 1 300 Applewood Crescent Concord Ontario L4K 5C7 CANADA Jan 2008 T
64. 6 2 13 32 aes Unit inch mm 18 4 REFRIGERANT FLOW DIAGRAM 4 1 Refrigerant Flow Diagram Outdoor Unit CMH1972 Indoor unit Outdoor unit Service valve on wide tube Cooling cycle Heating cycle Defrosting cycle Insulation of Refrigerant Tubing IMPORTANT Sub Main T 9 Wide tube cw _ accumulator accumulator 2 053 x pues ees T4 BW O D 3 8 UK cs High pressure AW switch H P O D 3 8 Jy i EE Header C 3 dsl valve lt o Defrost valve for E e hot gas bypass Xe 5 E Electric 2 expansion Service valve on valve narrow tube Narrow tube CN O D 1 gt s O D 1 4 gt lt ix ug PE gy pa Because capillary tubing is used in the outdoor unit both the wide and narrow tubes of this air conditioner become cold To prevent heat loss and wet floors due to dripping P condensation both tubes must be well insulated with a Thickness proper insulation material The thickness of the insulation should be a min 5 16 8 mm After a tube has been insulated to break or crack never try to bend it into a narrow curve because it can cause the tube 19 Min 5 16 8 mm Wide tube Thickness Min 5 1
65. 6 8 mm Narrow tube Outdoor Unit CMH2472 Indoor unit Outdoor unit Service valve on wens ul lator Wide tube T4 DW 8 0038 x O OlE T4 CW 8 O D 3 e AS dent High ae i Switc Ja BW H P onse i Ja AW OD UZ AS E Header PEE i 2 Defrost valve E Electric hot gas bypass S Service valve on vs EE w narrow tube va D Narrow tube TDN an O D 1 4 gt lt Due A L CN HR Y O D 1 4 gt lt D P m Dk 5 O D 1 4 _ Cooling cycle ERY pk D pk m m Strainer Header Heating cycle e Defrosting cycle Insulation of Refrigerant Tubing IMPORTANT Because capillary tubing is used in the outdoor unit both the wide and narrow tubes of this air conditioner become cold To Insulation prevent heat loss and wet floors due to dripping of condensation both tubes must be well insulated with a proper insulation material The thickness of the insulation should be a min 5 16 8 mm After a tube has been insulated never try to bend it into a narrow CAUTION curve because it can cause the tube to break or crack 20 Thickness Min 5 16 8 mm Wide tube ZX Thickness Min 5 16 8 mm Narrow tube Outdoor Unit CMH3172 Indoor unit Outdoor unit
66. 8 13 mu ie 3 E HOLIMS YOLSINYSAHL T z 3unssaud HOIH 109 3409 c ar lol alia 6 a ma DE ma ON BE aS om zig 1HM j HM we EX le H VE 9 9 50 HOLSINYSHL aa 5 32 Or yOssaudWwoo HOLO3NNOO 4 o 8 8FA2 5257 59300 1 43 Outdoor Unit CMH3172 To avoid electrical shock hazard be sure to WARNING disconnect power before checking servicing and or cleaning any electrical parts Madns LINN HOGGNI OL EE AMOJ LINN LINN LINN 5 7 8 9 5 so o 5 Kai az L Z g ZO Q tc t ui E x reOss E m E ma x 3409 CEE ANUS 4s u ss 5 5 z 2 d T3A NHO yn 8 fo AUD Q 418 E o D lojo 13A mn tu afa 099 z
67. ABLES lt List of Combination Tables gt Name of Combination Table Model No of Outdoor Unit Remarks 3 Room Outdoor Unit Combination Table CMH1972 Ol 852 6 4180 821 00 4 4 Room Outdoor Unit Combination Table CMH2472 OI 852 6 4180 822 00 5 4 Room Outdoor Unit Combination Table CMH3172 OI 852 6 4180 805 00 4 NOTE Be sure to operate the air conditioning system only when 2 or more indoor units have been installed If operated with only a single unit installed the returning fluid to the compressor may cause a malfunction A 2 Save this Combination Table Please be sure to hand over this sheet to the user S 3 Room Outdoor Unit Combination Table CMH1972 lt Combinations of Connectable Indoor Units gt The combinations of the indoor units listed in Table 1 and Table 2 are combinations solely of those units which can be operated concurrently In addition to the combinations listed in the table other combinations of indoor units are possible provided that the following conditions are satisfied Conditions 1 Atleast two or more indoor units must be connected to the multi outdoor unit It is not acceptable for only one indoor unit to be connected 2 The total rated cooling capacity of the indoor units to be connected must be no more than 200 of the rated cooling capacity of the outdoor unit In this case all the indoor units installed must not be operated concurrently under
68. CMH3172 lll Cooling Characteristics RH 46 Indoor fan speed High fan 230V 60Hz Indoor Unit KMHS1872 X 1 1 Low pressure performance chart 174 1 2 psig MPaG 146 1 0 118 Ro indoor air temp 86 80 F 30 C 2770 0 8 75 F 247C Low pressure at wide tube service valve 90 0 6 77 25 86 30 95 104 35 40 Outdoor air temperature F C 2 Operating current performance chart 9 Operating current A 77 25 86 30 Outdoor air temperature F C 95 104 35 40 3 Indoor discharge air performance chart T T a 5 gt 68 0 20 l u 1 1 644 18 o T T a 60 8 16 1 1 EI eFl 80 C 4 57 2 14 doorlair temp 86 o oC 53 6 12 80 F 27 o T I o 3 er 2490 50 0 10 T o 1 DT 46 4 8 77 86 95 104 25 30 35 40 Outdoor air temperature F NOTE lll Heating Characteristics RH 85 Indoor fan speed High fan 230V 60Hz 1 High pressure performance chart
69. TECHNICAL amp SERVICE MANUAL SANYO OUTDOOR UNIT CMH1972 CMH2472 CMH3172 FILE NO Destination North America DC INVERTER MULTI SYSTEM AIR CONDITIONER Capacity at 230V Outdoor Model No Product Code No 19 100 BTU h CMH1972 1 852 330 30 23 200 BTU h CMH2472 1 852 330 31 30 600 BTU h CMH3172 1 852 330 32 lt Applicable Indoor Units gt CMH1972 Wall mounted type KMHS0772 KMHS0972 KMHS1272 KMHS1872 KMHS2472 NOTE For details about the combination refer to Unit Combination Table in the Appendix of this manual CMH2472 These air conditioners employ new refrigerant R410A Pay special attention when servicing the unit CMH3172 REFERENCE NO SM700660 04 Important Please Read Before Starting This air conditioning system meets strict safety and operating standards As the installer or service person it is an important part of your job to install or service the system so it operates safely and efficiently For safe installation and trouble free operation you must Carefully read this instruction booklet before beginning Follow each installation or repair step exactly as shown Observe all local state and national electrical codes Pay close attention to all warning and caution notices given in this manual This symbol refers to a hazard or
70. The Values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit KMHS0972 3units Outdoor Unit CMH2472 tunit 2 Rating conditions are Cooling Indoor air temp 80 F D B 67 F W B Heating Indoor air temp 70 F D B Outdoor air temp 95 F D B 75 F W B Outdoor air temp 47 F D B 43 F W B Outdoor Unit CMH2472 Indoor Unit KMHS0972 x 3 Type 4 Room Multi Outdoor Unit Number of Operatable Indoor Units Performance Heating Total Capacity BTU h 23 200 9 800 to 23 200 29 200 11 600 to 29 200 kW 6 80 2 90 to 6 80 8 60 3 40 to 8 60 Sensible Capacity BTU h 19 600 Latent Capacity BTU h 3 600 Air Circulation High ft min m3 h 1 707 2 900 Electrical Rating Heating 2 270 Power Factor BE OE a _ X7 jJ Features Outdoor Unit SEN Compressor Refrigerant Amount charged at shipment Refrigerant Control Operation Sound igh Cool Hea E Refrigerant Tubing Connections Max allowable tubing length per unit Refrigerant Narrow iube eh nm Tube Diameter Wide tube inch mm Dimensions amp Weight Outdoor Unit Unit Dimensions inch 29 1 8 X 35 7 16 X 12 19 32 Height X Width X Depth mm 740 X 900 X 320 Height X Width X Depth mm 860 X 1 032 X 413 Weight Net Ib kg Shipping Ib kg Shipping Volume cu ft m
71. UEM amp 20 8 5 d x 90 218 0 6 77 86 95 104 1 5 23 32 41 50 59 68 77 25 30 35 40 C5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart 5 a SON 9 oT S APA T x OOS AAA 5 t SAT VT 5 5 RS 5 5 NS 4 9 6 2 2 E amp amp e g 4 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 68 0 20 131 55 T 8 644 18 S 12260 S S o o 60 8 16 B 113045 E 9 5 57 214 4j 104 40 8 8 B 53 6 12 5 95 35 8 8 50 0 10 5 86 30 Q Q 8 8 46 4 8 77 25 77 86 95 104 23 32 41 50 59 68 77 25 80 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C NOTE This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the perf
72. age breaker is not installed electric shock can occur When Transporting Be careful when picking up and moving the indoor and outdoor units Get a partner to help and bend your knees when lifting to reduce strain on your back Sharp edges or thin aluminum fins on the air conditioner can cut your fingers When Installing In a Ceiling or Wall Make sure the ceiling wall is strong enough to hold the unit s weight It may be necessary to construct a strong wood or metal frame to provide added support In a Room Properly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to walls and floors In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid level foundation for the outdoor unit This prevents water damage and abnormal vibration In an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame Provide a suitable air baffle In a Snowy Area for Heat Pump type Systems Install the outdoor unit on a raised platform that is higher than drifting snow Provide snow vents When Connecting Refrigerant Tubing Use the flare method for connecting tubing Apply refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them then tighten the nut with a torque wrench for a leak free connection Check carefully for leaks before starting the test run When Servicing Tur
73. ature rises the compressor starts the outdoor fan starts and the indoor fan changes from LL to the set fan speed Depending on the relationship between the remote controller temperature setting and the room temperature the compressor may stop temporarily in other words the thermostat may turn OFF When the frequency reaches Hz frequency increases are stopped for a period of 8 seconds Refor to Table 2 Freguency control This is in order to stabilize the return of oil to the compressor The frequency then increases If the indoor and outdoor temperatures are high the current peak cut off activates stopping any increases in frequency The room temperature has reached the desired temperature The indoor temperature and the remote controller temperature setting are approximately equal Operating frequency is stabilized in order to maintain a comfortable environment The thermostat turns OFF The indoor fan is stopped The outdoor unit stops It does not stop if the thermostat for another indoor unit is ON Approximately 30 seconds after the thermostat turns OFF the indoor fan is stopped The indoor and outdoor temperatures are high In order to protect the compressor the outdoor unit will not operate for 3 minutes after the thermostat turns OFF even if the room temperature drops below the desired temperature The outdoor unit starts automatically after 3 minu
74. ay not run properly and trouble may occur Example When 4 indoor units are connected at 230V If the following holds true e Rated cooling capacity of CMH2472 outdoor unit C 23200 BTU h e Rated cooling capacity of indoor units K1 K2 BTU h Then C x 2 200 K2 23200 x 2 7500 7500 7500 17500 46400 40000 It is therefore possible to connect 4 units with respective capacities of 7500 7500 7500 17500 However since this combination is not found in the 4 room operation column of Table 1 operating all these units concurrently may result in trouble At a time like this shut down at least one of the 4 indoor units to match one of the combinations found in the 3 room operation column of Table 1 at 208V If the following holds true e Rated cooling capacity of CMH2472 outdoor unit C 23200 BTU h e Rated cooling capacity of indoor units K1 K2 BTU h Then C x 2 200 K1 K2 23200 x 2 7500 7500 7500 17500 46400 40000 It is therefore possible to connect 4 units with respective capacities of 7500 7500 7500 17500 However since this combination is not found in the 4 room operation column of Table 2 operating all these units concurrently may result in trouble At a time like this shut down at least one of the 4 indoor units to match one of the combinations found in the 3 room operation column of Table 2 Ne Be sure to operate the air conditioning sys
75. b kg Shipping Ib kg Shipping Volume cu ft DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The Values shown in performance section and electrical rating section above are based on the following unit combination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit KMHS0972 4units Outdoor Unit CMH3172 tunit 2 Rating conditions are Cooling Indoor air temp 80 F D B 67 F W B Heating Indoor air temp 70 F D B Outdoor air temp 95 F D B 75 F W B Outdoor air temp 47 F D B 43 F W B 10 Outdoor Unit CMH3172 Indoor Unit KMHS0972 x 4 Type 4 Room Multi Outdoor Unit Number of Operatable Indoor Units Performance Heating Total Capacity BTU h 28 600 9 800 to 28 600 32 000 11 600 to 32 000 kw 8 40 2 90 to 8 40 9 40 3 40 to 9 40 Sensible Capacity BTU h 24 200 Latent Capacity BTU h 4 400 Air Circulation High ft min m3 h 1 942 3 300 Electrical Rating Heating 2 350 Power Factor RER e X 7 Features Outdoor Unit Cont Far SES Compressor Refrigerant Amount charged at shipment Refrigerant Control Operation Sound High Coolest 25 Refrigerant Tubing Connections Max allowable tubing length per uint Refrigerant Narrow iube eh ave Tube Diameter Wide tube inch mm Dimensions amp Weight Outdoor Unit Unit Dimensions inch 35 1 32 X 35 7 16 X 12 19 32 Height X Width X Depth mm 890 X 900 x 320 Height
76. cally purchased 3 8 9 52mm 3 8 9 52mm 1 2 12 70mm 1 2 12 70mm Outdoor unit Indoor unit 3 8 9 52mm DA KMHS0772 KMHS0972 KMHS1272 3 8 9 52mm KMHS0772 KMHS0972 KMHS1272 3 8 9 52mm BIO H KMHS0772 KMHS0972 KMHS1272 1 4 6 35mm 88mm AL H KMHS2472 0 1 4 6 35mm 70mm Union 5 8 15 88mm Flare 1 2 12 70mm Union 3 8 9 52mm 1 2 12 70mm gt 3 8 9 52mm Supplied Reducer Fig 4j Outdoor unit Indoor unit 3 8 9 52mm DA KMHS0772 KMHS0972 KMHS1272 1 4 6 35mm KMHS0772 KMHS0972 KMHS1272 ue eee 1 2 12 70mm BO KMHS1872 a TA 6 90 5 8 15 88mm KMHS2472 ol 1 4 6 35mm Flare 1 2 12 70mm Union 5 8 15 88mm L 1 1 2 12 70mm 5 8 15 88mm Locally purchased Fig 4k 2 3 Outdoor Unit AVOID heat sources exhaust fans etc Fig 5a damp humid or uneven locations DO e choose a place as cool as possible e choose place that is well ventilated allow enough room around the unit for air intake exhaust and possible maintenance Fig 5b provide a solid base level concrete pad concrete block 6 x 1 4 15 x 40 cm beams or e
77. ch Next mount the valve cap and tighten it with a torque wrench the cap needs to be tightened with the torque of 180 Ibs in 200 kgf cm This process is very important to prevent gas from leaking from the system 12 Test run the air conditioner See page 23 14 If there is no leakage stop the air conditioner 15 Wipe off the soap on the tubing This completes air purging with a vacuum pump and the air conditioner is ready for actual operation Pump Down 2 13 While the air conditioner is running apply liquid soap to check for any gas leaks around the service valves or caps 4 In order to protect the earth s environment be sure to perform pump down to recover refrigerant gas without releasing it into the atmosphere When relocating or disposing of the A C request this service from the dealer where the unit was purchased or from an appropriate agent Perform pump down as described below What is pump down e Pump down refers to recovering the refrigerant gas from the refrig erant cycle at the outdoor unit This work must be performed dur ing cooling operation The refrigerant gas cannot be recovered during heating operation e During winter or if the temperature sensor prevents cooling opera tion perform forced cooling operation Pump down procedure 1 Fully close the spindles at the valves on the narrow tube side of tubes A B C and D Refer to Fig 22 2 Connect
78. city Min Max Capacity Min Max A 7500 4700 8800 8500 8500 6100 14600 Single room 9000 4700 10900 12200 12200 6100 16000 Operation 11900 5100 12200 14300 14300 6400 16700 17500 5400 19100 20400 20400 6800 24400 2 room Operation 3 room Operation e The table lists the wall mounted type of indoor units as representative models Save this Combination Table Please be sure to hand over this sheet to the user S 4 Room Outdoor Unit Combination Table CMH2472 lt Combinations of Connectable Indoor Units gt The combinations of the indoor units listed in Table 1 and Table 2 are combinations solely of those units which can be operated concurrently In addition to the combinations listed in the table other combinations of indoor units are possible provided that the following conditions are satisfied Conditions 1 Atleast two or more indoor units must be connected to the multi outdoor unit It is not acceptable for only one indoor unit to be connected 2 The total rated cooling capacity of the indoor units to be connected must be no more than 200 of the rated cooling capacity of the outdoor unit In this case all the indoor units installed must not be operated concurrently under any wen circumstances Otherwise the air conditioner m
79. ction Screw in 5 rotations by hand Fig 14 b To fasten the flare nuts apply specified torque as Table 4 Tube Dia Tightening Torque Union Flare nut 1 4 6 35 mm Approx 120 160 Ibs in 140 180 Fig 13 3 8 9 52 mm Approx 300 360 Ibs in 340 420 kgf cm 1 2 12 70 mm 5 8 15 88 mm Approx 430 540 Ibs in 490 610 kgf cm Approx 590 710 Ibs in 680 820 kgf cm Service valve on narrow tube side D Service valve on wide tube side 14 Apply the provided labels to the indoor and outdoor unit tubing connectors to prevent errors in connections tubing and electric wiring between indoor and outdoor units For more details refer to Tubing Check Control in the Technical amp Service Manual NES Be sure to match refrigerant 3 6 Insulation of Refrigerant Tubing IMPORTANT To prevent heat loss and wet floors due to dripping of con densation both tubes must be well insulated with a proper insulation material The thickness of the insulation should be a minimum 5 16 8 mm Fig 17 3 7 Taping the Tubes NES After a tube has been insulated never try to bend it into a narrow curve as this may cause the tube to break or crack 1 At this time the 2 refrigerant tubes and electrical wire if local codes permit should be taped together with armoring tape The drain hose may
80. culated based on the assumption that the ideal or target vac uum condition is around 10 mmHg abs 5 With the vacuum pump still running close the Lo knob of the manifold valve Then stop the vacuum pump Fully close the low pressure valve and stop the vacuum pump Wait 1 2 minutes and check that the manifold gauge pointer does not return If it does return find and repair the leak then apply the vacuum again 6 With a hex wrench turn the valve stem on the nar row tube service valve counter clockwise by 90 degrees 1 4 turn for 10 seconds and then turn the stem clockwise to close it again CAUTION Be sure to completely insert the hex wrench before attempting to turn the valve With a standard screwdriver turn the wide tube service valve stem counterclockwise to fully open the valve 8 Turn the narrow tube service valve stem counter clockwise to fully open the valve Loosen the vacuum hose connected to the wide tube service port slightly to release the pressure Then remove the hose 10 Leak test all joints at the tubing both indoor and outdoors with liquid soap Bubbles indicate a leak Be sure to wipe off the soap with a clean cloth NES If a CFC gas detector is used use a special detector for HFC refrigerant such as R410 and R134a 17 11 Replace the flare nut on the wide tube service port and fasten the flare nut securely with an adjustable wrench or box wren
81. disconnect and circuit break er for overcurrent protection provided in the exclusive line 3 To prevent possible hazard due to insulation failure the unit must be grounded 4 Each wiring connection must be done tightly and in accordance with the wiring system diagram Wrong wiring may cause the unit to misoperate or become damaged 5 Do not allow wiring to touch the refrigerant tubing compressor or any moving parts of the fan 6 Unauthorized changes in the internal wiring can be very dangerous The manufacturer will accept no responsibility for any damage or misoperation that occurs as a result of such unauthorized changes 5 2 Recommended Wire Length and Diameter Regulations on wiring diameter differ from locality to locality For field wiring requirements please refer to your local elec trical codes Carefully observe these regulations when car rying out the installation Table 6 shows maximum wire lengths for control line and power line and fuse or circuit capacity Refer to the wiring system diagram Fig 25a or 25b for the meaning of A B and C in Table 6 Refer to your local codes or in the absence of local codes see the National Electric Code ANSI NFPA70 Table 6 AWG Max Power Line Length ft Max Control Line Length ft Fuse A B C or Model 12 14 Circuit Capasity CMH1972 85 Max 82 Max 20 A CMH2472 85 Max 82 Max 20A CMH3172 85 Max 100 Max 20A
82. e system so it operates safely and efficiently For safe installation and trouble free operation you must Carefully read this instruction booklet before beginning Follow each installation or repair step exactly as shown Observe all local state and national electrical codes Pay close attention to all warning and caution notices given in this manual This symbol refers to a hazard or unsafe practice which can WARNING result in severe personal injury or death This symbol refers to a hazard or unsafe practice which can CAUTION result in personal injury or prod uct or property damage If Necessary Get Help These instructions are all you need for most installation sites and maintenance conditions If you require help for a special problem contact our sales service outlet or your certified dealer for additional instructions In Case of Improper Installation The manufacturer shall in no way be responsible for improp er installation or maintenance service including failure to follow the instructions in this document SPECIAL PRECAUTIONS WARNING When Wiring ELECTRICAL SHOCK CAN CAUSE SEVERE PERSONAL INJURY OR DEATH ONLY A QUALIFIED EXPERIENCED ELECTRICIAN SHOULD ATTEMPT TO WIRE THIS SYSTEM Do not supply power to the unit until all wiring and tubing are completed or reconnected and checked Highly dangerous electrical voltages are used in this system Carefully refer to the wiring diagram and
83. e temperature for releasing of defrosting is 68 F or higher when the outdoor air temperature is less than 32 F Defrost does not occur during HIGH POWER operation If other stopped indoor units are started during defrost operation they begin operating in defrost mode 2 Clean defrost If all indoor units are stopped during HEAT operation and frost is detected at the L1 line and the conditions for defrost are met then defrost operation occurs and the unit stops after defrost is completed 50 7 2 2 Current Control The operating current may rise as a result of causes including increasing heating or cooling loads or decreases in power voltage In these cases the operating frequency is automatically reduced or operation is stopped in order to control the operating current so that it is 20 A or less As a result A Power breakers and fuses will not be tripped Operation can continue during this period with somewhat reduced heating or cooling capacity Operation at normal capacity is restored when the cause of the current rise is eliminated Description of function Example of operation for heating 20 Power Point E 17 Point B 16 6 Point _____ _______ ___ _ gt Lio LLL frequency amp Frequency 2 Stops operation Approx 3 minutes Operates at the target frequency at Point A and below Stops increases to the frequency between Point
84. ed in Table 2 obtaining wire Also check Cut each tube to the appropriate lengths 1 to 1 4 any specified instructions or 80 cm to 40 cm to dampen vibration between units limitations Table 2 TN Narrow Tube Wide Tube Outer Dia Thickness Outer Dia Thickness KMHS0772 1 4 6 35 mm 0 0314 0 8 mm 3 8 9 52 mm 0 0314 0 8 mm KMHS0972 1 4 6 35 mm 0 0314 0 8 mm 3 8 9 52 mm 0 0314 0 8 mm KMHS1272 1 4 6 35 mm 0 0314 0 8 mm 3 8 9 52 mm 0 0314 0 8 mm KMHS1872 1 4 6 35 mm 0 0314 0 8 mm 1 2 12 70 mm 0 0314 0 8 mm KMHS2472 1 4 6 35 mm 0 0314 0 8 mm 5 8 15 88 mm 0 0393 1 0 mm 3 1 5 Additional Materials Required for Installation Refrigeration armored tape Insulated staples or clamps for connecting wire See local codes Putty Refrigeration lubricant Clamps or saddles to secure refrigerant tubing Indoor unit Installation Site Selection Indoor Unit To prevent abnormal heat generation WARNING and the possibility of fire do not place obstacles enclosures and E grilles in front of or surrounding the ip 7 Drain hose air conditioner in a way that may block air flow Outside drainage AVOID Fig 1 direct sunlight nearby heat sources that may affect performance of the ff MEM UA unit 2 5 cm 2 5 cm min min areas where leakage of flammable gas may be expected 7 placing or allowing any obstructi
85. ely with R22 and R407C e To prevent other refrigerants R22 R407C from being mistakenly charged to this unit shape and external diameter of the service port screw has been altered External diameter of service port R410A 5 16 R22 R407C 1 4 9 4 Tubing Installation Procedures When the tubes are connected always apply HAB oil on the flare portions to improve the sealing of tubing The following is the HAB oil generally used Esso ZERICE 532 Neu For details on tubing installation procedures refer to the installation manuals attached to the indoor unit and outdoor unit 63 9 5 In Case of Compressor Malfunction CAUTION Should the compressor malfunction be sure to make the switch to a replacement compressor as quickly as possible Use only the tools indicated exclusively for R410A See 9 3 Tools Specifically for R410A 9 5 1 Procedure for Replacing Compressor 1 Recovering refrigerant e Any remaining refrigerant inside the unit should not be released to the atmosphere but recovered using the refrigerant recovery unit for R410A e Do not reuse the recovered refrigerant since it will contain impurities 2 Replacing Compressor Soon after removing seals of both discharge and suction tubes of the new compressor replace it quickly 3 Checking for sealing Use nitrogen gas for the pressurized gas and never use a refrigerant other than R410A Also do not use oxygen or any flammable
86. erence is large the valve is closed Then rotate 5 revolutions counterclockwise to open the valve Operation is normal if the temperature difference between the 2 tubes drops 1 If you have manually checked the electric expansion valve be sure to reapply the outdoor power after you have replaced the wiring The position of the elecric expansion valve will changed 58 8 Branch tubing temperature sensor Check that the sensor is securely contained in the thermostat holder 9 Breaker Check whether or not the breaker has been tripped Check that the breakers and fuses used are of the specified capacity Check that the breaker and its line are exclusive for A C use 10 Refrigerant gas pressure Start a COOL test run and messure the temperatures of the A C intake air and discharge air Compare the values with the performance charts e If the values are higher than the performance charts Check for refrigerant shortage or blockage of the refrigerant circuit lt Assessment of refrigerant shortage gt 1 The pressure in the low pressure section is 5 MPa or more below the value in the performance charts 2 There is little condensation on the indoor heart exchanger which overall appears dry lt Distinguishing between refrigerant shortage and refrigerant circuit blockage gt If the pressure in the low pressure section does not change when the circuit is charged 2 to 3 times with refrigerant gas 0 44 Ibs each ti
87. f there is a grounding terminal inside the room use the grounding screw inside the indoor unit connected to service valve D top of the outdoor unit Inter unit cables 14 not provided e Be sure to apply the provided labels to both ends of the inter unit cables to prevent mis wiring The units will not function if the wiring connections are incorrect AWG American Wire Gauge Inter Unit conduit Fig 31 Use a dedicated A C circuit for power To make connections to the outdoor unit remove the inspection panel and tubing panel Do not bring the inter unit cables or power cable into contact with tubing or service valves Use outdoor unit cable fasteners and fasten the inter unit cables at the location where the cables are double sheathed e Arrange the wiring so that the inter unit cables are con tained in the inspection panel and tubing panel as shown in Fig 31 22 Regulations on wire size differ from locality to locality For field wiring requirements please refer to your local electri cal codes Make sure that the installation fully complies with all local and national regulations 1 Remove access panel C Fig 32 2 Connect the inter unit and power supply line accord ing to the drawing on the panel side 3 Be sure to size each wire allowing approx 4 10 cm longer than the required length for wiring
88. gas 4 Evacuation e Use a solenoid valve installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption the valve will prevent the pump oil from flowing back The equipment may be damaged if moisture remains in the tubing thus carry out the evacuation thoroughly When using a vacuum pump with exhaust air volume more than 0 883 cu ft min and ultimate vacuum pressure rate of 50 micron Hg Standard time for evacuation 1 Recover refrigerant OK Y 2 Replace compressor OK 3 Check for sealing 4 Evacuation 5 Recharge Length of tubing Less than 33 ft 10 m More than 33 ft 10 m Evacuation time More than 10 minutes More than 15 minutes 64 5 Recharging e Be sure to charge the specified amount of refrigerant in liquid state using the service port of the wide tube service valve The proper amount is listed on the unit s nameplate When the entire amount cannot be charged all at once charge gradually while operating the unit in Cooling Operation CAUTION Never charge a large amount of liquid refrigerant at once to the unit This may cause damage to the compressor When charging with a refrigerant cylinder use an electronic scale for charging refrigerant In this case if the volume of refrigerant in the cylinder becomes less than 20 of the fully charged amount the composition of the refrigerant starts to chan
89. ge Thus do not use the refrigerant if the amount in the charging cylinder is less than 20 Also charge the minimum necessary amount to the charging cylinder before using it to charge the air conditioning unit Example In case of charging refrigerant to a unit requiring 1 68 Ib 0 76 Kg using a capacity of a 22 Ib 10 Kg cylinder the minimum necessary amount for the cylinder is 1 68 22 x 0 20 6 08 lb 0 76 10 x 0 20 2 76 Kg For the remaining refrigerant refer to the instructions of the refrigerant manufacturer If using a charging cylinder transfer the specified amount of liquid refrigerant from the refrigerant cylinder to the charging cylinder Prepare an evacuated charging cylinder beforehand CAUTION 9 TO Prevent the composition of R410A from changing never bleed the refrigerant gas into the atmosphere while transferring the refrigerant Fig 3 Do not use the refrigerant if the amount in the charging cylinder is less than 20 65 Configuration and characteristics of cylinders Valve TB Single valve Charge liquid refrigerant with cylinder in up side down position Fig 1 Single valve with siphon tube Charge with cylinder in normal position Fig 2 yew Charging cylinder Open Refrigerant cylinder Fig 3 9 6 In Case Refrigerant is Leaking CAUTION Never attempt to charge additional refrigerant when refrigerant has been leak
90. ination For other combination unit please refer to the Unit Combination Tables in this manual Indoor Unit KMHS0972 3units Outdoor Unit CMH1972 tunit 2 Rating conditions are Cooling Indoor air temp 80 F D B 67 F W B Heating Indoor air temp 70 F D B Outdoor air temp 95 F D B 75 F W B Outdoor air temp 47 F D B 43 F W B Outdoor Unit CMH2472 Indoor Unit KMHS0972 x 3 Type 4 Room Multi Outdoor Unit Number of Operatable Indoor Units Performance Heating Total Capacity BTU h 23 200 9 800 to 23 200 29 200 11 600 to 29 200 kW 6 80 2 90 to 6 80 8 60 3 40 to 8 60 Sensible Capacity BTU h 19 600 Latent Capacity BTU h 3 600 Air Circulation High ft min m3 h 1 707 2 900 Electrical Rating Heating Available Voltage Range Running Amperes A O 2 270 Power Factor BE OE a jJ Features Outdoor Unit SEN Compressor Refrigerant Amount charged at shipment Refrigerant Control Operation Sound igh Cool Hea E Refrigerant Tubing Connections Max allowable tubing length per unit Refrigerant Narrow iube eh nm Tube Diameter Wide tube inch mm Dimensions amp Weight Outdoor Unit Unit Dimensions inch 29 1 8 X 35 7 16 X 12 19 32 Height X Width X Depth mm 740 X 900 X 320 Height X Width X Depth mm 860 X 1 032 X 413 Weight Net Ib kg Shipping Ib kg Shipping Volume cu ft m DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1
91. ing from the unit Follow the procedure described below to locate points of leaks and carry out repairs then recharge the refrigerant 1 Detecting Leaks e Use the detector for R410A to locate refrigerant leak points 2 Recovering refrigerant Never release the gas to the atmosphere recover residual refrigerant using the refrigerant recovery unit for R410A instead Do not reuse the recovered refrigerant because its composition will have been altered 3 Welding leaking points Confirm again that no residual refrigerant exists in the unit before starting welding Weld securely using flux and wax for R410A Prevent oxide film from forming inside the tubes utilizing substitution with nitrogen N2 in the refrigerant circuit of the unit Leave ends of tubes open during welding 4 Checking for sealing e Use nitrogen gas for the pressurized gas and never use a refrigerant other than R410A Also do not use oxygen or any flammable gas 5 Evacuation e Use a solenoid valve installed vacuum pump so that even if power is cut off in the middle of evacuation of air due to a power interruption the valve will prevent the pump oil from flowing back The equipment may be damaged if moisture remains in the tubing thus carry out the evacuation thoroughly When using a vacuum pump with exhaust air volume more than 0 883 cu ft min and ultimate vacuum pressure rate of 50 micron Hg Standard time for evacuat
92. intercom Electrical noise from any of these sources may affect operation install in a sturdy manner to avoid increased operating noise Table 3 Max Max Allowable Total Limit of Limit of Elevation Required Amount Allowable Tubing Length Total Tubing Length Difference of Additional Model Tubing Length at shipment L1 L2 L3 or H1 H2 H3 H4 Refrigerant per unit L1 L2 L3 or L1 L2 L3 L4 ft oz ft ft L1 L2 L3 L4 ft ft CMH1972 82 150 L1 L2 L3 150 L1 L2 L3 50 CMH2472 82 150 L1 L2 L3 L4 200 L1 L2 L3 L4 50 0 22 CMH3172 100 150 L1 L2 L3 L4 230 L1 L2 L3 L4 50 0 22 f total tubing length becomes 150 to 200 ft Max or 150 to 230 ft Max charge additional refrigerant R410A by 0 22 oz ft No additional charge of compressor oil is necessary For more detailed charging information refer to the Technical amp Service Manual 2 2 Connecting Indoor Units 1 Connecting indoor unit for CMH1972 A Outdoor unit 3 8 9 52mm Indoor unit 9 3 8 9 52mm 3 8 9 52mm 1 4 6 35mm t___ KMHS0772 KMHS0972 KMHS1272 5 3 8 9 52mm q t4 635mm eem KMHS0772 KMHS0972 KMHS1272 A 3 8 9 52mm 0 Outdoor unit 1 4 6 35mm Fig 4a 3 8 9 52mm KMHS0772 KMHS0972 KMHS1272 Indoor unit 9 3 8 9 52mm B Q4 635mm ggr BE
93. ion Length of tubing Less than 33 ft 10 m More than 33 ft 10 m 1 Detect leaks OK Y 2 Recover refrigerant OK Y 3 Weld leaking points OK Y 4 Check for sealing OK 5 Evacuation OK 6 Recharge Evacuation time More than 10 minutes More than 15 minutes 6 Recharging e Recharge unit in the same manner explained on the previous page 5 Recharging 66 9 7 Charging Additional Refrigerant 9 7 1 When Tubes are Extended Observe the proper amount of refrigerant as stated in this service manual or the installation manual that came with the indoor unit Charge additional refrigerant in liquid state only A Nea Never charge additional refrigerant if refrigerant is leaking from the unit Follow instructions given in 9 6 In Case Refrigerant is Leaking and completely carry out repairs Only then should you recharge the refrigerant 9 8 Retro Fitting Existing Systems 9 8 1 Use of Existing Units e Never use new refrigerant R410A for existing units which use R22 This will cause the air conditioner to operate improperly and may result in a hazardous condition 9 8 2 Use of Existing Tubing e f replacing an older unit that used refrigerant R22 with a R410A unit do not use its existing tubing Instead completely new tubing must be used 67 APPENDIX A INSTALLATION INSTRUCTIONS CMH1972 CMH2472 CMH3172 1I 852 6 4189 993 00 2 A 1 SANYO
94. ion of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 31 Outdoor Unit CMH3172 Indoor Unit KMHS0972 X 1 lll Cooling Characteristics Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart 88 n 2g 9 4 Sa 174 gt 50 82 12 i i ge S Q 2 2 2 434 PTS 9 3 0 SS UA T E ASIA 2 146 2 c KAN 1 0 S 36 S E 5 2 5 oO s g g 2 Us 290 B
95. ions again purge the air from the tubes 23 Lock nut Cabinet Terminal block amp Conduit plate Conduit Conduit Fig 32 Access panel Conduit plate Make sure there is no gap between access panel C and the conduit plate Fig 33 7 Connecting a Home Automation Device The HA white 4P terminal is located on the indoor unit PCB If a HA device will be used connect it to this terminal 8 Installation Check Sheet The strength of the installation location is sufficient to support the A C weight The indoor and outdoor units are installed level and vertically The power and voltage are as specified Inter unit cables are securely fastened to the terminal board Inter unit cables are securely fixed The power cord and inter unit cables are not connected anywhere along their paths The ground wire is securely connected An air purge of the refrigerant circuit has been conducted A leak test of the tubing connections has been performed Thermal insulation has been applied to the tubing connections Drain connections are secure and water drains properly Putty has been used to close the hole in the wall All service valves are fully open Remote controller signals are being positively received 24 APPENDIX B UNIT COMBINATION T
96. ity at 230V 30600 BTU h 2000 Mae 17500 KMHS1872 24200 KMHS2472 Table 1 Indoor Unit Capacity BTU h COOLING HEATING Room Total Performance Room Room Room Total Performance D Capacity Min A B D Capacity Min 7500 4000 8800 8500 8500 6100 14600 9000 4400 10900 12200 12200 6100 16000 11900 4700 12200 14300 14300 6400 17400 17500 5100 19700 20400 20400 6800 26600 24200 5400 25200 29000 29000 6800 30000 Indoor Unit Combination Single room Operation 2 room Operation 3 room Operation 4 room Operation X ES p EI p d p eee ee ee a ee le le le ele e The table lists the wall mounted type of indoor units as representative models Voltage Rating 208V 60Hz CMH3172 7500 KMHS0772 Rated cooling capacity at 208V 28600 BTU h 17500 KMHS1872 24200 KMHS2472 Table 2 Indoor Unit Capacity BTU h COOLING HEATING Room Total Performance Room Room Room Total Performance D Capacity Min A B D Capacity Min 7
97. ixed 40 Outdoor Unit CMH3172 Indoor Unit KMHS0972 4 Power Supply 230V Single Phase 60Hz lt Heating Capacity gt RATING CAPACITY 32 000 BTU h AIR FLOW RATE 1 130 CFM OUTDOOR INDOOR ENT TEMP F C AMBIENT TEMP F C 60 65 70 75 80 15 6 18 3 21 1 23 9 26 7 w 0 17 8 TH 18 270 18 260 18 230 18 200 18 150 N 18 23 5 ol 28 2 D n TH Total Heating Capacity BTU h 33 0 38 3 wo 99 43 6 o 48 8 1 Rating conditions 4 Indoor Unit Entering Air Temp 70 F 21 1 C D B Outdoor Ambient Temp 47 F 8 3 C 43 F 6 1 C W B 2 Above data does not take Defrost Operation Overload Prevention Protection and or Cold Air Prevention Protection during heating operation into account For this reason the value may vary from the actual heating characteristics 3 Above data represents the value when the operation frequency of a compressor is fixed 41 6 ELECTRICAL DATA 6 1 Electric Wiring Diagrams Outdoor Unit CMH1972 To avoid electrical shock hazard be sure to WARNING disconnect power before checking servicing and or cleaning any electrical parts
98. ly refrigerant lubricant to the matching surfaces of the flare and union tubes before connecting them then tighten the nut with a torque wrench for a leak free connection Check carefully for leaks before starting the test run When Servicing Turn the power OFF at the main power box mains before opening the unit to check or repair electrical parts and wiring Keep your fingers and clothing away from any moving parts Clean up the site after you finish remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced Others Ventilate any enclosed areas when installing or testing the refrigeration system Escaped refrigerant gas on contact with fire or heat can produce dangerously toxic gas Confirm upon completing installation that no refrigerant gas is leaking If escaped gas comes in contact with a stove gas water heater electric room heater or other heat source it can produce dangerously toxic gas Do not install only a single indoor unit 1 General This booklet briefly outlines where and how to install the 5 Carpenter s level air conditioning system Please read over the entire set 6 Sabre saw or key hole saw of instructions for the indoor and outdoor units and make 7 Hacksaw sure all accessory parts listed are with the system before 8 Core bits beginning If the electric wiring diagram does not appear 9 Hammer in this manual please
99. me or if the change is small then the problem may not be refrigerant shortage The problem may be a blockage of the refrigerant circuit 1 Check that there is no internal leakage inside the 4 way valve At the low pressure side tubing check that there is no temperature difference between the intake and discharge of the 4 way valve 2 Check that the electric expansion valve is not blocked Check as described on the preceding page 59 8 5 Trouble Diagnosis of Fan Motor e This outdoor DC fan motor contains an internal control PCB Therefore it is not possible to measure the coil resistance and the following procedure should be used to check the motor e Perform the trouble diagnosis by Test Run mode described on Installation Instructions of indoor unit Important A Turn OFF the power before connecting or disconnecting the motor connectors B When performing voltage measurement at the outdoor controller connector for 3 in the table below the DC motor will trip and voltage output will stop approximately 10 seconds after operation is started For this reason to measure the voltage again first turn OFF the outdoor unit power then measure the voltage in Test Run mode Trouble symptom 1 The fan does not stop when the outdoor unit stops Outdoor unit controller trouble Trouble symptom 2 The fan motor does not rotate when the outdoor unit is operating Diagnostic procedure Disconnect the motor connectors and measure the vol
100. n the power off at the main power box mains before opening the unit to check or repair electrical parts and wiring Keep your fingers and clothing away from any moving parts Clean up the site after you finish remembering to check that no metal scraps or bits of wiring have been left inside the unit being serviced Ventilate any enclosed areas when installing or testing the refrigeration system Escaped refrigerant gas on contact with fire or heat can produce dangerously toxic gas Confirm upon completing installation that no refrigerant gas is leaking If escaped gas comes in contact with a stove gas water heater electric room heater or other heat source it can produce dangerously toxic gas Table of Contents APPLICABLE INDOOR UNITS ssi sees rao is atacand ee an tete itunes OPERATING RANGE faa a Ue i G T E EE EO TET SPECIFICATIONS 2 1 Unit Specifications 2 2 Major Component Specifications emen 2 3 Other Component Specifications DIMENSIONAL ee 17 7 005 105 m REFRIGERANT FLOW DIAGRAM 4 1 Refrigerant Flow Diagram D D OU PERFORMANCE DATA 5 1 Temperature Charts eene nennen nennen 5 2 Cooling Capacity AUTEIRUE IPM T PEE 5 3 Heating Capacity ELECTRICAL DATA 6 1 Electric Wiring Diagrams memet nnne FUNCTIONS 7 1 Explanation of Functions iv chev 7 2 Protective Functions soda ec italia cius D E I
101. nation Tables in this manual Indoor Unit KMHS0972 3units Outdoor Unit CMH1972 tunit 2 Rating conditions are Cooling Indoor air temp 80 F D B 67 F W B Heating Indoor air temp 70 F D B Outdoor air temp 95 F D B 75 F W B Outdoor air temp 47 F D B 43 F W B Outdoor Unit CMH1972 Indoor Unit KMHS0972 x 3 Type 3 Room Multi Outdoor Unit Number of Operatable Indoor Units Performance Heating Total Capacity BTU h 19 100 9 800to 19 100 24 800 11 600 to 24 800 kw 5 60 2 90to5 60 7 30 3 40 to 7 30 Sensible Capacity BTU h 16 300 Latent Capacity BTU h 2 800 Air Circulation High ft min m3 h 1 707 2 900 1 707 2 900 Electrical Rating Heating 85 1 735 Power Factor RE Features Outdoor Unit SEN Compressor Refrigerant Amount charged at shipment Refrigerant Control Operation Sound igh Cool Hea E Refrigerant Tubing Connections Max allowable tubing length per unit Refrigerant Namow iube mn nm Tube Diameter Wide tube inch mm Dimensions amp Weight Outdoor Unit Unit Dimensions inch 29 1 8 X 35 7 16 X 12 19 32 Height X Width X Depth mm 740 X 900 X 320 Height X Width X Depth mm 860 X 1 032 X 413 Weight Net Ib kg Shipping Ib kg Shipping Volume cu ft m DATA SUBJECT TO CHANGE WITHOUT NOTICE Remarks 1 The Values shown in performance section and electrical rating section above are based on the following unit comb
102. nit 3 8 9 52mm D A 3 8 9 52mm a 1 4 6 35mm 3 8 9 52mm r 3 8 9 52mm 1 4 6 35mm 3 8 9 52mm B 3 8 9 52mm 174 4 6 35 58 15 88mm A 1 2 12 70mm 1 4 6 35mm Flare 1 2 12 70mm Union 5 8 15 88mm L J 1 2 12 70mm 5 8 15 88mm Locally purchased Fig 4e D Outdoor unit Indoor unit 3 8 9 52mm D A 0 3 8 9 52mm 1 4 6 35mm 3 onm ae 3 8 9 52mm 1 4 6 35mm 1 2 12 70mm BL EE E A CAT 6 35mm Loic oo 5 8 15 88mm E ee EE a 1 4 6 35mm 3 8 9 52mm 1 2 12 70mm Flare 1 2 12 70mm Union 5 8 15 88mm L J 1 2 12 70mm 5 8 15 88mm Locally purchased Flare 3 8 9 52mm Union 1 2 1 Locally purchased Fig 4f KMHS0772 KMHS0972 KMHS1 272 KMHS0772 KMHS0972 KMHS1 272 KMHS0772 KMHS0972 KMHS1 272 KMHS2472 KMHS0772 KMHS0972 KMHS1272 KMHS0772 KMHS0972 KMHS1272 KMHS1872 KMHS2472 2 70mm L J 3 8 9 52mm 1 2 12 70mm 3 Connecting indoor unit for CMH3172 A Outdoor unit 3 8 9 52mm Indoor unit pla 3 8 9 52mm 74 6 35 agro 52mm 5 3 8 9 52mm 6 35 3409 52mm TE
103. ntion to moisture prevention and faster replacement work compared with conventional models are required 61 9 2 Checklist before Servicing Use a clutch type flare tool for R410A or the conventional flare tool Note that sizes of the resultant flares differ between these two tools Where a conventional flare tool is used make sure to observe A Specification amount of extrusion by using the flare spacer Specification A Flare tool for R410A Conventional flare tool for R22 Diameter of tube D Dia 1 4 6 35 mm Dia 3 8 9 52 mm 0 to 0 0196 0 0472 Dia 1 2 12 7 mm 0 to 0 5 mm 1 2 mm Dia 5 8 15 88 mm Size of flare 7 amp u NM NM UA Flare tool for R410A Conventional flare tool R22 e Tubing precautions e Refrigerant R410A is more easily affected by dust or moisture compared with R22 thus be sure to temporarily cover the ends of the tubing with caps or tape prior to installation Never use 0 0276 0 7 mm thick copper tubing or tubing which is less than 0 0315 0 8 mm in thickness since air conditioners with R410A are subject to higher pressure than those using R22 and R407C e No addition of compressor oil for R410A No additional charge of compressor oil is permitted e No use of refrigerant other than R410A Never use a refrigerant other than R410A e If refrigerant R410A is exposed to fire Through welding etc toxic gas may be released when R4
104. ntroller check No voltage on circuit board Voltage varies Use a multi meter to measure the voltage 12 V When the power is turned ON the needle will move in the following seguence in approximately 10 to 20 seconds for Cool the main unit with a damp cloth or other means while welding When applying vacuum use the special service magnet and rotate at least 5 No temperature change Open and close the electric expansion valve by hand to check it Temperature changes revolutions counterclockwise to fully open the electric Replace the electric expansion valve This part is normal Check elsewhere expansion valve each point Model No Sequence CMH1972 MV1 MV2 CMH2472 CMH3172 MVO MV1 MV2 MV3 Y Y Check the illumination Check the coil resistance lt Check the resistance between the gray lead of the red Power Lamp wire and the other wires Resistance is OK if it is 46 4ohm at 68 F Y 0 ohm Approx 46 4 ohm Replace the controller 1 NOTE Replace the coil Use the special service magnet and rotate 5 revolutions clockwise to fully close the valve Then start the unit and measure the temperature at the inlet and outlet tubes of the electric expansion valve If the temperature diff
105. ompressor Model Nominal Output 5JD420XAB22 3 000W Compressor Oil Amount Pints cc FV50S 2 55 1 200 Coil Resistance Ambient Temp 68 F 20 C Ohm U V 0 435 V W 0 441 W U 0 452 Safety Device CT Peak current cut off control Yes Compressor Discharge Temp Control Yes Yes Operation cut off control in abnormal ambient Temp o Yes SES Overload Relay Operation Temp Open 239 F 115 C Close 212 F 100 C Run Capacitor Mim m s trae coco AT ame i I E Propeller Q ty Dia inch mm 1 D18 1 8 D460 Nominal Output 0 S Coil Resistance Ambient Temp 68 F 20 C Safety Device Type Internal Controller Over Current Protection Over Heat Protection Run Capacitor VAC Heat Exchanger Coil Coil Aluminum Plate Fin Copper Tube Rows Fins per inch 18 1 Face Area ft m 7 75 0 72 DATA SUBJECT TO CHANGE WITHOUT NOTICE 2 3 Other Component Specifications Quantity of Sensor Model No of sensor CMH1972 CMH2472 CMH3172 Sensor Name Outdoor air temp sensor TKS295B 1 1 Outdoor heat exchanger sensor TKS292B 1 1 AW AN sensor TKS292B BW BN sensor TKS292B CW CN sensor TKS292B DW DN sensor TKS292B 40 35 30 25 20 15 10 Resistance k ohm 4 5 14 23 32 41 50 59 68 20 15 10 5 0 5 10 15 20
106. ompressor stops and the indoor fan operates at LL very low speed 1 f fluctuation fan 6 minute cycle uM Fig 2 49 7 2 Protective Functions Neu The numerical values such as temperature frequency time and current in parentheses are an example of CMH3172 and the values are different from the other models 7 2 1 Defrost Detection and Release 1 Non stop defrosting Defrosting sequence 4 way valve ON Defrost detection occurs in either of the following cases The temperature of the heat exchanger remains at or below the L1 line for 35 minutes after the start of HEAT operation The temperature of the heat exchanger remains at or below the L2 line for 120 minutes after the start of HEAT operation Outdoor heat exchanger temperature F Heating operation AN 4 0 Outdoor air temperature F 21 2 Frost detection Compressor 80 Hz operation 4 way valve ON Outdoor fan OFF Solenoid valve ON for hot gas bypass Indoor fan gt OFF Non stop defrosting Temperature of the outdoor heat exchanger is at or above the temperature shown in the table below Defrost operation has continued for 12 minutes max length Releasing of defrosting Temperature of releasing Defrost operation time Less than 2 minutes 2 minutes or more Heat exchanger temperature for No releasing 57 2 F or higher 1 releasing defrosting 1 Th
107. ons near the A C inlet or outlet Front View installing in rooms that contain instant on rapid start Fig 2 fluorescent lamps These may prevent the A C from receiving signals INDOOR Tubing length L1 places where large amounts of oil mist exist UNIT 1 INDOOR installing in locations where there are devices that UNIT 2 generate high frequency emissions ined H1 OUTDOOR E Ho UNIT DO 3ls iti H4 INDOOR E INDOOR H3 select an appropriate position from which every corner of UNIT 4 L4 UNIT 3 the room can be uniformly cooled High on a wall is best select a location that will hold the weight of the unit Fig 3a select a location where tubing and drain hose have the shortest run to the outside Fig 1 NES allow room for operation and maintenance as well as Indoor unit install the unit within the maximum elevation difference air conditioner do not H1 H2 H3 H4 above or below the outdoor unit and install wall mounted type within a total tubing length L1 L2 L3 L1 L2 L3 L4 indoor units less than 5 from floor level from the outdoor unit as detailed in Table 3 and Fig 3a 1 5 m from floor level 5 1 5 Floor level Fig 3b Install the indoor unit more than 3 3 1 away from any antenna or power lines or connecting wires used for tele vision radio telephone security system or
108. or the Outdoor Unit 6 TESTRUN inneren 23 7 CONNECTING A HOME AUTOMATION DEVICE entre ete 24 8 INSTALLATION CHECK SHEET 24 SANYO Commercial Solutions A Division of SANYO North America Corporation Cornerstone Business Park 1062 Thorndale Avenue Benserville IL 60106 U S A 85264189993002 SANYO 2007 Model Combinations Combine indoor and outdoor units only as listed below Indoor Unit Outdoor Unit KMHS0772 CMH1972 KMHS0972 CMH2472 KMHS1272 CMH3172 KMHS1872 KMHS2472 Combine indoor and outdoor units only as listed in the combination tables for 3 room or 4 room outdoor unit as shown in its respective manual Power Source 60 Hz single phase 230 208 VAC Be sure to read the yellow instruction sheet attached to the outdoor unit for models using the new refrigerant R410A Combination example Indoor unit B Indoor unit A Indoor unit C Outdoor unit Indoor unit D The illustrations are based on the typical appearance of a standard model Consequently the shape may differ from that of the air conditioner that you are installing In Canada SANYO Canada Inc 1 300 Applewood Crescent Concord Ontario L4K 5C7 Canada W IMPORTANT Please Read Before Starting This air conditioning system meets strict safety and operating standards As the installer or service person it is an important part of your job to install or service th
109. ormance chart will vary 32 Outdoor Unit CMH3172 lll Cooling Characteristics RH 46 Indoor fan speed High fan 230V 60Hz 1 Low pressure performance chart Indoor Unit KMHS1272 X 1 g d Dey 2502 g D l l 2 2 146 l 8 10 l 8 1 Indoor air temp 86 F 30 C o do da T go F 27 C o o6 S 0 8 75 F 24 C WE 90 0 6 77 86 95 104 25 80 35 40 Outdoor air temperature F C 2 Operating current performance chart 6 T I l 1 30 ae z BN DS ger E 5 arret 19 g o 2 amp S l l MEN l l 77 86 95 104 25 30 35 40 Outdoor air temperature F C 3 Indoor discharge air performance chart 68 0 20 64 4 18 60 8 16 57 2 14 53 6 12 50 0 10 80 F 75 F 30 27 24 0 Indoor discharge air temperature F C 46 4 8 77 25 NOTE 86 30 95 85 Outdoor air temperature F C 104 40 lll Heating Characteristics RH 85 Indoor fan speed High fan 230V 60Hz 1 High pressure performance chart 506 5 3 5 V 434 psig MPaG 3 0
110. ownward and be sure that no copper scraps fall into the tube Fig 9 3 Remove the flare nut from the unit and be sure to mount it on the copper tube 4 Make a flare at the end of copper tube with a flare tool Figs 10 and 11 Use RIGID or equivalent A good flare should have the following characteristics inside surface is glossy and smooth edge is smooth tapered sides are of uniform length 3 4 Caution before Connecting Tubes Tightly a Be sure to apply a sealing cap or water proof tape to prevent dust or water from getting into the tubes before they are used b Be sure to apply refrigerant lubricant to the matching surfaces of the flare and union before connecting them together This is effective for reducing gas leaks Fig 12 c For proper connection align the union tube and flare tube straight with each other then screw in the flare nut lightly at first to obtain a smooth match Fig 13 3 5 Tubing Connections If the special R410A flare tool is used Y 0 to 0 0196 0 to 0 5 mm 2 Ee tubing Fig 9 If the previous flare tool clutch type is used Y Z 0 0472 1 2 mm Adjust so that the amount of tube protrusion is as shown in the figure Fig 10 Flare nut uu Copper SES di tubing Flare tool Apply refrigerant lubricant here and here Fig 11 Fig 12 a Temporary conne
111. pter manual and use the adapter correctly Be sure to use a manifold valve for air purging If it is not available use a stop valve for this purpose The Hi knob of the manifold valve must always be kept closed 16 Stopper Cap tightening torque 170 215 Ibs in 200 250 kgf cm Tighten by hand then use a wrench to turn Spindle Service port Screw diameter 1 2 UNF 20 threads oy uae SSSR Valve cor 77 Cap nut tightening torque 60 95 Ibs in 70 110 kgf cm Tighten by hand then use a wrench to turn approximately 30 SK lt Structure of service valve on wide tube side gt External diameter of service port R410A 5 16 Fig 21 e When using a hex wrench to open the spindle an extremely small amount of refrigerant may leak This does not indicate a problem e Use a hex wrench of a type to which force can be easily applied 4 With the Lo knob of the manifold valve open and high pressure valve Hi closed completely run the vacuum pump Run the pump until the pres sure 15 101 kPa 76 cmHg The operation time for the vacuum pump varies with tubing length and the capacity of the pump The following table shows the amount of time required for evacuation Table 5 Required time for evacuation when capacity of 100 liter h vacuum pump is used 20 min or more The required time in the above table is cal
112. qual a mini mum of 6 15 cm above ground level to reduce humidity and protect the unit against possible water damage and decreased service life Figs 5c and 5d Install cushion rubber under unit s feet to reduce vibration and noise Fig 5e A solid base must not cover the hole of the bottom plate use lug bolts or equal to bolt down unit reducing vibration and noise Install in a location where no antenna of a television or radio exists within 10 3 m O SS Exhaust fan Outdoor unit Obstacle above amp Min Min m 7 2m 2m Air intake Min 6 15cm Valve 5 side a Min 10 E 25 cm x 2 Min ET i S a Air discharge Min 2 4 10 cm 1 8 50 cm 5 Fig 5b Ground Min 6 15 cm Air intake VU 97 Drain holes Fig 5c Anchor bolts 4 pcs 222222 6 15 Air intake ZEEE Concrete A or equal Le S i e 45 om AN MN A WWW NN AN WW WW AW WW NW AN A ANIKI WW WWW Cushion rubber Fig 5e 10 2 4 Outer Dimensions of Outdoor Unit 1 CMH1972 23 15 16 5 11 32 A E m 35 7 16 900 2 29 32 Service valve on narrow tube side Outer diameter 1 4 6 35 Service valve on wide tube side Outer diameter 3 8
113. r side ANS Leave the gt for preventing water may lead to corrosion of parts in the refrigerant system reverse flow valve open special for Air Purging with a Vacuum Pump for Test Run Hex wrench Charging hose With push pin special for R410A e In order to protect the earth s environment be sure to use a vacuum pump to perform the air purge Never perform an air purge by using the refrigerant gas cylinder or other external gas or by using the gas inside the outdoor unit Fig 20 In order to prevent charging errors with A C that uses R410A the screw diameter at the service valve charging port has been changed When recharging or per forming other servicing use the special charging hose and manifold gauge Perform the air purge for tubes A B C and D Use the same procedures for all tubes 1 Check that each tube both narrow and wide tubes between the indoor and outdoor units have been properly connected and all wiring for the test run has been completed Note that both narrow and wide tube service valves on the outdoor unit are kept closed at this stage Using an adjustable wrench or box wrench remove the valve caps from the service valve on both narrow and wide tubes Connect a vacuum pump and a manifold valve with pressure gauges to the service port on the wide tube service valve Fig 20 Before using the vacuum pump adapter read the vacuum pump ada
114. r z 434 56 g 0 ndoo TOF TC 2 o 362 8 2 5 t 5 oc 290 2 0 53 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 2 Operating current performance chart 8 Operating current A 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C 3 Indoor discharge air performance chart 140 60 13155 LL 122 50 dyr B 3 D de S n RC amp 113 45 1 o 5 A 104 40 9 95 35 o Q 86 30 Q 5 77 25 23 32 41 50 59 68 77 5 0 5 10 15 20 25 Outdoor air temperature F C This performance chart shows operation of a single wall mounted indoor unit The performance chart will vary depending on the indoor unit type Check each performance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6t 7 5m If the tubing length is different the performance chart will vary 22 Outdoor Unit CMH1972 Indoor Unit KMHS0972 X 1
115. r Unit CMH1972 ll Cooling Characteristics RH 46 Indoor fan speed High fan 230V 60Hz 1 Low pressure performance chart Indoor Unit KMHS0772 X 1 188 MPaG amp psig 174 1 2 Low pressure at wide tube service valve 146 1 0 77 25 86 95 30 35 Outdoor air temperature F C 2 Operating current performance chart 104 40 Z 5 E4 z 0 C op 30 prior air temp apr y i 2 3 T 80 F 27 C 24 0 5 77 86 95 104 25 30 35 40 Outdoor air temperature F C 3 Indoor discharge air performance chart 68 0 20 aa se u 9 64 4 18 5 ir temp set z 2 60 8 16 ndoor 2 27 0 57 2 14 D op 24 53 6 12 152 2 12 9 50 0 10 i 46 4 8 l l 77 86 95 104 25 30 35 40 Outdoor air temperature F C NOTE Heating Characteristics RH 85 Indoor fan speed High fan 230V 60Hz 1 High pressure performance chart 29 gt 506 8 85 2 2 o C 2 e
116. rate of 0 5 Hz every 1 seconds When the frequency reaches Hz frequency increases are stopped for a period of B seconds Refer to Table 2 The frequency then increases DRY operation starts DRY A operation The indoor fan changes between Low and LL very low over a 6 minute cycle This is 1 f fluctuation fan operation Refer to Fig 2 DRY B operation 1 The indoor fan changes between Low and LL very low over a 6 minute cycle This is 1 f fluctuation fan operation y 2 After appoximately 3 minutes the compressor turns OFF the outdoor fan turns OFF and the indoor fan turns OFF U 3 After approximately 6 minutes the conditions return to 1 This is in order to stabilize the return of oil to the compressor If the indoor and outdoor temperatures are high the current peak cut off activates stopping any increases in frequency Operating frequency is stabilized in order to maintain a comfortable environment Operates to effectively dehumidify the air while not excessively reducing the indoor temperature The indoor unit operates at 1 f fluctuation fan operation at a fan speed that does not cause a chilly feeling The compressor operates on a 3 minutes ON 6 minutes OFF cycle to prevent the room temperature from dropping too much The room temperature is below 59 F Monitoring operation begins 48 When monitoring operation begins the c
117. rformance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 28 Outdoor Unit CMH2472 Indoor Unit KMHS1872 X 1 lll Cooling Characteristics lll Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart 2g gt 86 Se 174 SE ca 82 12 perO 8 40 5 8 0 a8 ndo0 8 8 TO LAA 8 09 pt 2 T m 3 5 1 25 u u g g 146 B 434 1 0 3 0 1 1 a 3 T3 5 132 362 0 9 77 86 95 104 2 5 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart 8 1 1 a ar 5 de mad
118. rge temp Sensor for heat excharge temp Sensor for branch pipe A Narrow tube Sensor for branch pipe B Narrow tube Sensor for branch pipe C Narrow tube Sensor for branch pipe D Narrow tube Outdoor temp sensor Sensor for branch pipe A Wide tube Sensor for branch pipe B Wide tube Sensor for branch pipe C Wide tube Sensor for branch pipe D Wide tube HIC circuit trouble current temp Actuation of comp over load relay Actuation of freeze protection function Cr OO OX LE OO OU BS OR IR Outdoor unit error Detail of error message indicate indoor LED 54 8 3 Checking the Outdoor System 8 3 1 Checking the outdoor unit Work procedure Check items unit operation Apply 220 V AC between terminals L1 and L2 on the outdoor unit terminal plate The LED red on the control board must illuminate Short circuit the T RUN terminal to the COM terminal of TEST T RUN terminals The compressor fan motor 4 way valve and solenoid valve for the hot gas bypass must turn ON They turn ON about 70 seconds later after the power is turned ON Al If the above check items are okay but the outdoor unit does not operate there may be a faulty connection between the indoor unit and the outdoor unit
119. ring Instructions for the Outdoor Unit e Be sure to correctly align inter unit cables A C and D Outdoor unit A Terminal board Indoor unit A A is the indoor unit with refrigerant tubing that is connected to service valve A top of the outdoor unit Terminal board Inter unit cables 14 not provided T tate A AL l Terminal board Inter unit cables 14 not provided Label B E i Indoor unit B B is the indoor unit with refrigerant tubing that is connected to service valve B top of the outdoor unit Indoor unit C is the indoor unit with refrigerant tubing that is connected to service valve C top of the outdoor unit Terminal board Inter unit cables 14 not provided Indoor unit D D is the indoor unit with refrigerant tubing that is Power supply conduit 7 Power Single phase 230 208VAC 60HZ Power switch J not provided Ground Power cable not provided 12 Less than 85 ft Be sure to perform grounding e Attach a ground wire to either the outdoor unit or indoor unit e I
120. ristics lll Heating Characteristics RH 46 Indoor fan speed High fan RH 85 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart 2 in gt 8 12 82 40 ga gt 8 8 8 160 2 506 g 11 8 35 SON E Le CO w w 92 g g Let 999 146 a 434 9 CO 2 10 8 30 SO Lee a a 8 5 d I 132 362 0 9 77 86 95 104 5 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 2 Operating current performance chart 2 Operating current performance chart 8 T T l zs z t t T EE L a aot 0 3 2 6 M xem 2 E NI LT 5 1 1 6 66 V L ox 5 18 l 6 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C 3 Indoor discharge air performance chart 3 Indoor discharge air performance chart 140 60 e amp 68 0 20 uw 131655 9 3 64 4 18 3 122 50 LC 5 S 13 e 2 60 8 16 E 119 45 MEM 2 2 nom lt 8 57 2 14 S 104 40 TW 2 2 2 53 6 12 95 35 D E 5 5 50 0 10 5 86 30 3 3 46 4 8 77 25 77 86 95 104 23 32 41 50 59 68 77 25 30 85 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F C NOTE
121. rmance value in test run mode Electrical performance values represent a combined indoor outdoor value In this case be sure to stop all the indoor units where performance is not being checked The performance is for a tubing length of 24 6ft 7 5m If the tubing length is different the performance chart will vary 27 Outdoor Unit CMH2472 Indoor Unit KMHS1272 X 1 il Cooling Characteristics i Heating Characteristics RH 4696 Indoor fan speed High fan RH 8596 Indoor fan speed High fan 230V 60Hz 230V 60Hz 1 Low pressure performance chart 1 High pressure performance chart eg 8 do S 174 Sic 8 1 2 8 o 88 5 amp 506 8 i 2 5 se E 434 EROS E 3 0 AS 5 or 146 2 d 1 0 2 362 5 2 25 132 0 9 77 86 95 104 23 32 41 50 59 68 77 25 30 35 40 5 0 5 10 15 20 25 Outdoor air temperature F C Outdoor air temperature F
122. s A and B Reduces the frequency by 1 Hz per 0 5 seconds when Point B is exceeded Stops operation and restarts it appoximately 3 minutes later if Point C is exceeded May operate when sudden voltage fluctuations occur Indicates trouble 1 Automatic frequency control The operating frequency is reduced automatically or operation is stopped in order to control the operating current so that it is at or below the values shown in the table below Point C peak cut trip Point B Hz reduction Point A Hz increase prohibit During defrost operation the COOL current setting value is used 2 Current control The operating frequency upper limits shown in the figure below are established for frequency reduction and increase prohibit Current A Example of operation during cooling Trip Hz reduction Hz reduction Hz increase Pont moat Hz increase prohibit prohibit Hz reduction 16 mmn Hz increase prohibit 15 6 0v Frequency Hz 51 7 2 3 Low Start Current Operation starts at 8 Hz and the start current is less than the normal operating current This prevents the flickering of fluorescent lights or television screens that occurs when ordinary A C units start 7 2 4 Compressor Temperature Control To protect the compressor coil from overheating the operating frequency is controlled based on the compressor discharge temperature
123. t peak cut off activates stopping any increases in frequency The room temperature has reached the desired temperature The thermostat turns OFF The indoor temperature and the desired temperature are approximately equal Operating frequency is stabilized in order to maintain a comfortable environment The outdoor unit stops It does not stop if the thermostart for another indoor unit is ON The thermostat turns ON again After the thermostat turns ON again the outdoor unit will not operate for 3 minutes even if the room temperature increases above the desired temperature After 3 minutes the outdoor unit begins operating automatically During these 3 minutes a pressure balance is achieved allowing the compressor to start more easily Freeze prevention When the temperature of the indoor heat exchanger drops to approximately 35 6 F or below the compressor turns OFF the outdoor fan turns OFF and the indoor fan continues operating with no changes U Approximately 3 minutes later if the temperature of the indoor heat exchanger is adove 46 4 F the system returns to its original conditions In order to protect against freezing the compressor stops temporarily until the temperature of the indoor heat exchanger has risen Stop All indicator lamps turn OFF The indoor and outdoor units stop Operation is restarted within 4 hours only when AUTO mode is selected with the
124. tage at the DC motor connectors on the outdoor unit controller 3 locations Measurement location Normal value 1 Vm Gnd Between pin 1 and pin 4 DC 230V or more 2 Vcc Gnd Between pin 5 and pin 4 DC 14V or more 8 Vsp Gnd Between pin 7 and pin 4 After fluctuating 4 times between DC 1 7 to 6 1V 1 sec ON and DC 0 V 1 sec OFF the DC motor trips Diagnostic results All of the above measured values are normal Fan motor trouble Replace the motor Any one of the above measured values is not normal Outdoor unit controller trouble Replace the controller Reference DC motor connector pin arrangement Pin 1 Vm red Pin 2 Not used Pin 3 Not used Pin 4 Gnd blue Pin 5 Vcc brown Pin 6 PG white Pin 7 Vsp orange Trouble symptom 3 Motor rotates for some time several seconds but then quickly stops when the outdoor unit operates There is trouble in the system that provides feedback of motor rotation speed from the motor to the outdoor unit controller Trouble symptom 4 Fan motor rotation speed does not change during outdoor unit operation Trouble symptom 5 Fan motor rotation speed varies excessively during outdoor unit operation Remedy for symptom 3 to 5 It is not possible to identify whether the trouble is outdoor unit controller trouble or motor trouble Therefore first replace the outdoor unit controller then if necessary replace the DC motor 60 9 REFRIGERANT R
125. tem only when 2 or more indoor units have been installed If operated with only a single unit installed the returning fluid to the compressor may cause a malfunction Pub OI 85264180822005 SANYO 2008 lt Combinations of operatable indoor units gt Voltage Rating 230V 60Hz CMH2472 7500 KMHS0772 Rated cooling capacity at 230V 23200 BTU h co MSN 17500 KMHS1872 24200 KMHS2472 Table 1 Indoor Unit Capacity BTU h COOLING HEATING Room Total Performance Room Room Room Total Performance D Capacity Min Max A B D Capacity Min 7500 4700 8800 8500 8500 6100 14600 9000 4700 10900 12200 12200 6100 16000 11900 5100 12200 14300 14300 6400 16700 17500 5400 19700 20400 20400 6800 26200 23200 5400 23200 27200 27200 6800 27200 Indoor Unit Combination Single room Operation 2 room Operation 3 room Operation A ET n m n E tft fel ele fe f fe fe le f Concurrent operation of 4 indoor units prohibited 4 room This multi outdoor unit allows up to four indoor units to be connected Operation However all four indoor units must not be operated concurrently Otherwise the air conditioner may not run properly Up to three indoor
126. tes During these 3 minutes a low pressure pressure balance is achieved allowing the compressor to start more easily The frequency is not increased even if there is a difference between the room temperature and the desired temperature In some cases the frequency may be decreased 45 The amount of heat pump exceeds the amount of heat radiation from the room Therefore there is no need to further increase the compressor capacity and the frequency is stabilized or lowered Control conditions Unit operation Explanation The thermostat turns ON The indoor unit is stopped The unit operated before and the temperature of the indoor heat exchanger is relatively warm Therefore the fan speed may start at the set fan speed at the same time that the thermostat turns ON When defrost operation begins frost has formed on the outdoor unit when the ambient air temperature is low Non stop defrost Indoor fan Stopped Outdoor fan Stopped Compressor 80 Hz Solenoid valve for hot gas bypass ON 4 way valve Remains ON Operation lamp Red and orange ON alternately Defrost operation begins based on outdoor heat exchanger temperature and outdoor air temperature conditions Non stop defrost Refer to Fig 1 1 After HEAT operation begins the temperature of the outdoor heat exchanger is at or below the L1 line for 35 minutes If outdoor air temperature is less than 26 6
127. these instructions when wiring Improper connections and inadequate grounding can cause accidental injury or death Ground the unit following local electrical codes Connect all wiring tightly Loose wiring may cause over heating at connection points and a possible fire hazard When Transporting Be careful when picking up and moving the indoor and out door units Get a partner to help and bend your knees when lifting to reduce strain on your back Sharp edges or thin alu minum fins on the air conditioner can cut your fingers When Installing In a Ceiling or Wall Make sure the ceiling wall is strong enough to hold the unit s weight It may be necessary to construct a strong wood or metal frame to provide added support In a Room Properly insulate any tubing run inside a room to prevent sweating that can cause dripping and water damage to walls and floors In Moist or Uneven Locations Use a raised concrete pad or concrete blocks to provide a solid level foundation for the outdoor unit This prevents water damage and abnormal vibration In an Area with High Winds Securely anchor the outdoor unit down with bolts and a metal frame Provide a suitable air baffle In a Snowy Area for Heat Pump type Systems Install the outdoor unit on a raised platform that is higher than drifting snow Provide snow vents When Connecting Refrigerant Tubing Use the flare method for connecting tubing App
128. turn 4 way valve does not operate The compressor only does not The compressor speed does not increase Does not cool or cooling performance is inadequate Does not heat or heating performance is inadequate O Outdoor fan dose not turn Self Diagnostics check Indoor controller control unit O Outdoor unit does not operate Indoor fan motor Room temperature sensor Heat exchanger temperature sensor Indoor unit Inter unit cable O O Operation lamp blinking Switch circuit board Outdoor control circuit board Diode module HIC Electrolytic capacitor Fuse Compressor Compressor protective sensor Outdoor unit CA Rom eS IPS rire 4 SE ke GE OIO O O Outdoor fan motor 4 way valve Coil thermistor Electric expansion valve Branch tubing temperature sensor 56 Indoor unit Outdoor unit Others Problems No of Inspection Points for Each part Inspection points The compressor stops on occasion The outdoor air temperature is high however defrost operation occurs The electric expansion valve does Defrost operation does not occur not operate Operation lamp does not illuminate Outdoor unit does not operate 4 way valve does not operate The compressor only does not The compressor speed does not increase m S ves c
129. units may be operated concurrently e The table lists the wall mounted type of indoor units as representative models Voltage Rating 208V 60Hz CMH2472 7500 KMHS0772 Rated cooling capacity at 208V 23200 BTU h pone a oe 17500 KMHS1872 24200 KMHS2472 Table 2 Indoor Unit Capacity BTU h COOLING HEATING Room Total Performance Room Room Room Total Performance D Capacity Min A B D Capacity Min Max 7500 4700 8800 8500 8500 6100 14600 9000 4700 10900 12200 12200 6100 16000 Indoor Unit Combination Single room Operation 11900 5100 12200 14300 14300 6400 16700 17500 5400 19700 20400 20400 6800 24400 22400 5400 22400 25800 25800 6800 25800 2 room Operation 3 room Operation E x F FE p Concurrent operation of 4 indoor units prohibited 4 room This multi outdoor unit allows up to four indoor units to be connected Operation However all four indoor units must not be operated concurrently Otherwise the air conditioner may not run properly Up to three indoor units may be operated concurrently

Service Manual - Boston Heating Supply

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