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Panasonic MVA Series Air Handling Unit Service Manual

1. Ol oO 6 amp alele lelelele lelelele le ele e S CN ped 2 CIRCUIT 2 CIRCUIT 1 CIRCUIT 2 CIRCUIT 1 240 208 240 208 240 208 240 208 240 208 240 8 a 0 foo o 2 e 0 a o o o vo eo 0 S 988 4 lt 4 N IS 40 109 NIS 46 109 1B s 4 e e oo GEM e 9 files 5 id ed e 212 o so CIRCUIT 1 Notes Minimum Wire Gauge is based upon Circuit 1 ampacity and the use of 75C wire at the unit 2 14 5kW and 19 5kW Heating units require two supply circuits 1 MVA30 36 42 48 60 use ECM VE motor 3 MVA18 24 use ECM 5 0 motor MVA IOM 1 0 4 25 2014 Page 31 of 38 035 000039 001 UNIT DIMENSIONS MVA18 60 Elec Heat Ready RH Drain Connections Configuration B E CENTER OF UNIT LOW VOLTAGE ENTRY ALT 1 625 PPLY
2. 502 BRN 502 L1 e BLK 601 gt S IHARNESS CONNECTION DISC DISCONNECT e RELAY CONNECTION POINT FU FUSE gt INSULATED WIRE LS LIMIT SWITCH FACTORY WIRING SEQ HEAT SEQUENCER OPTIONAL WIRING SW SWITCH 035 000039 001 WIRES BY OTHERS CHASSIS GROUND EARTH GROUND TRAN TRANSFORMER TERMINAL BLOCK TDR TIME DELAY RELAY Page 21 of 38 TYPICAL WIRING MVA30 MVA36 MVA42 MVA48 MVA60 MVA 1 0 4 25 2014 INSTALLATION ELECTRICAL cont d TYPICAL WIRING DIAGRAMS Electric Heat 1 6kW and 8 9 5 DISC1 RED 209 12 o o T 208 240V 1 Phase E ox ee BLK 201 USE COPPER SUPPLY WIRES CBC2 RED 209 7 REDI208 LS1 BLK 205 BLKI 206 A A BLK 207 RED 208 5 aa 4 N YELI202 V V V WY ORN BO2 601 3 BRNI60 2 ORN 602 At TS BRN 601 CBC BLK 201 YEL 202 RED 204 LEGEND TITLE 208 240V 1 Phase 1 6 KW Electric Heat Section gt gt Connection Factory Winng Field Wiring Earth Ground DISC Disconnect Switch uc Wesce TYPICAL WIRING ELECTRIC HEAT IHTR Electric Heat Strip ILS Limit Switch RED 217 12 T 208 240V 1 Phase BLK 205 L1 8 vj RED 217 RED 21 USE COPPER ED 2 4 ED 216 SUPPLY WIRES HTR2 LS2 BLK 243
3. Power supply 208 230V 60Hz 3 PH NOTE See table below for wire requirements for lines above marked A B C and D Control wiring B Remote control wiring AWG 18 0 75 AWG 18 0 75 mm 3 280 ft 1 640 ft Inter unit between outdoorand indoor units control wiring C Control wiring for group D Inter outdoor unit control control wiring AWG 18 0 75 AWG 18 0 75 mm Max 650 ft Total Max 980 ft MVA IOM 1 0 4 25 2014 INSTALLATION ELECTRICAL Figure 11 Inter Unit Control Wiring Do not install the inter unit control wiring in a way that forms a loop ete 2 Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit Figure 12 Inter Unit Control Wiring Do not install inter unit control wiring with splic es or star branch pattern Star branch wiring causes misaddress setting errors Branch point Outdoor unit Outdoor unit Outdoor unit Indoor unit Indoor unit Indoor unit Indoor unit more than 3 3 ft Branch point 16 or fewer more than 3 3 ft Figure 13 Branched Inter Unit Control Wiring less than 3 3 ft If branching the inter unit control wiring the number of branch points should be Ind t 16 or fewer Branches less than 3 3 ft are not included in the total branch num ber 035 000039 001 Page 19 of 38 MVA 1 0 4 25 2014 INSTALLATION ELECTRICAL cont d TYPICAL WIRING DIAG
4. 10 0 42 48 36 0 36 0 36 0 270 6 0 11 0 36 0 36 0 31 0 60 11 0 18 24 1120 7 0 194 35 7 45 0 30 36 12 01 7 0 23 5 40 6 50 0 42 48 12 0 7 0 263 43 6 540 60 120 7 0 28 3 46 4 56 0 UNIT SIZE POWER CONTROLS ENTRY EITHER SIDE SUPPLY AIR SENSOR ENTRY OPT ALT ALT CONTROLS POWER ENTRY ENTRY POWER ENTRY EITHER SIDE EATING m SELECTRICA CONTROLS LL E SERVICE 7 ENTRY 2 1 POWER EITHER SIDE BLOWER MOTOR f iss ACCESS z 1 D FILTER ACCESS RE CONDENSATE FILTER DRAIN TRAP SERVICE CLEARANCE CLEARANCE AS REQUIRED AS REQUIRED LEFT VIEW FRONT VIEW NOTES 1 BLOWER SERVICE REQUIRES FRONT ACCESS ONLY 2 RECOMMENDED BUT NOT NECESSARY ALLOW 12 ON RIGHT AND LEFT SIDES FOR SIGNIFICANT BUT IN FREQUENT SERVICE PROCEDURES SUCH AS DRAIN PAN OR COIL REPLACEMENT 3 WHEN UNIT IS INSTALLED HORIZONTALLY LYING ON LEFT OR RIGHT SIDES REFER TO RETURN ORIEN TATIONS CLEARANCES REMAIN THE SAME AS INDICATED ABOVE EXCEPT TRAP CLEARANCE EXTENDS BELOW THE UNIT 035 000039 001 Page 11 of 38 MVA IOM 1 0 4 25 2014 INSTALLATION SERVICE CLEARANCES SIDE RETURN FILTER DETAILS COIL SERVICE _ CLEARANCE 57 57 5757 57 57 gt gt FILTER CONDENSATE DRAIN TRAP CLEARANCE AS REQU
5. THIS PAGE INTENTIONALLY LEFT BLANK 035 000039 001 Page 36 of 38 MVA IOM 1 0 4 25 2014 MVA Series Air Handling Unit Start up Report JobName 2 Sales Order Model Number Seria Number Wstaler Quantity of Units STARTUP REPORT 2 Checklist Item ves Does electrical service correspond to unit nameplate d Nameplate Supply Voltage Phase Rated Measured Nameplate Rated FLA motor current ______ Measured Does all field wiring conform to unit wiring diagram Is field provided freeze protection present if require Is fan wheel turning the correct ls the filter clean Is unit properly supported Is unit installed level necessary for proper condensate drainage 4 Is properly sized condensate trap present Is the condensate disposal system operating correctly Is auxiliary external condensate drain pan installed or auxiliary drain connection utilized as recommended by not requires for valid ew CRITICAL For Horizontal Unit Orientation Is the EEV in vertical ofentaion the DX system charged per the condensing Is unit piping correct and insulated to prevent condensation Are the refrigerant pipelines properly insulated o O O T Are there any leaks detected interior to unitoratconnections 4 e214199
6. 1022 804 197 1067 780 206 1132 743 215 1173 711 222 1201 666 902 774 156 955 749 163 1016 717 173 1067 690 181 1102 656 193 1144 611 201 MEE 0 000 0100 000 1 030 0 400 ______0 500 Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM 5 5 309 High 204 low 630 940 121 663 892 125 693 835 130 730 797 138 750 743 143 806 696 152 MEE s 0 000 0100 000 1 030 0 400 0500 Fan Setting RPM SCFM WATTS RPM SCFM 5 RPM SCFM WATTS RPM SCFM WATTS RPM SCFM 5 RPM 5 5 HighTop 934 1425 406 943 1396 414 96 1358 417 988 1319 426 1005 1279 432 1032 1246 440 881 1342 393 900 1311 347 920 1271 356 939 1229 356 967 1195 365 986 1160 370 251 204 0 100 RPM SCFM WATTS RPM SCFM WATTS RPM SCFM Airflow Performance 9090 0400 000 FanSeting WATTS RPM 5 WATTS RPM SCFM WATTS RPM 5 WATTS 1722 1679 1009 1642 1029 1597 1050 1557 1071 1510 567 353 1475 1425 1388 353 1335 1287 1238 370 1311 1271 1229 1195 1151 286 90 1114 290 1228 1184 1140 1099 1046 254 G ws 0 000 0100 020 030 0 400 C 0500 Fan Setting RPM
7. BLK 214 A A A 820246 lt lt g VIO 03 p O 2 0 0 RED 209 1 RED 208 CBC2 3 4 6 HTR1 151 BLK 205 BLK 206 A A REDI207 RED 208 y 1 YELI202 V V V L VIO 603 ORN 602 _ BRN 604 3 ORN 602 7 BRN 601 CBC1 BLK 201 lt YEL 202 LEGEND TITLE 208 240V 1 Phase 8 9 5 KW Electric Heat Section gt gt Connection Factory Wiring Field Wiring Earth Ground pse TYPICAL WIRING ELECTRIC HEAT IHTR Electric Heat Strip LS Limit Switch 035 000039 001 Page 22 of 38 MVA IOM 1 0 4 25 2014 INSTALLATION ELECTRICAL cont d TYPICAL WIRING DIAGRAMS Electric Heat 14 5kW and 19 5kW 141 gt 122 a Li 204240 _ 11 O n USE COPPER SUPPLY WIRES RED 217 RED 216 Las _ REDI209 NLRED 204 BLK 213 BLK 214 zx HTR3 CHHBe2 O4 mo A 5 _ REDI 216 RED 208 RED 209 M BLK 210 HTR2 a BLK 205 df BLKI206 A N A gt REDI212 YEL 202 2 VIO 603 02 _ _ BRN 604 HTR1 3 A BLK 207 RED 208 2 ORN 602 Tas oe NBRN 601 F N m BRN 601 CB BLK 201 lt YEL 202 RED 204 LEGEND TITLE 208 240V 1 Phase 14 5 KW Electric Heat Section gt
8. SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS RPM SCFM WATTS 5 5 RPM SCFM_WATTS 1057 1894 1040 1080 1872 1031 1093 1816 1020 1104 1764 1010 1109 1685 990 1122 1629 975 370 low 760 1311 248 784 1271 258 1229 263 834 1195 274 870 1151 26 900 1114 290 MEE 0 000 0100 020 0390 0 400 050 Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM 5 WATTS RPM 5 WATTS RPM WATTS RPM 5 5 1110 450 a N 2082 699 909 2027 1959 1932 1007 1889 1038 1844 1793 1716 450 1667 1623 1577 1517 1603 1544 1489 1425 1373 1335 400 NOTES 1 Data at sea level w 1 throw away filter and dry coil 035 000039 001 Page 25 of 38 MVA IOM 1 0 4 25 2014 oN m co oO Airflow Performance Curves MVA18 0 50 0 50 045 045 8 0 40 3 lt 040 5 035 5 E 0 35 2 t 9 2 5 0 30 E 5 0 30 E gt o 025 8 025 9 020 A 9 0 20 5 S lt 0 15 0 15 010 010 g 0 05 0 05 0 00 0 00 400 500 600 700 800 900 600 700 800 900 1000 1100 Airflow SCFM Airflow SCFM MVA30 MVA36 0 50 0 50 0 45 0 45 0 40 5 0 40 5 0 35 5 0 35 5 0 30 5 0 30 E 0 25 8 025 9 020 5 020 B 0 15 5 0 15 V o 0 10 0 10 0 05 5 0 05 0 00 0 00 600 700 800 900 1000 1100 1200 1300 800 900 1000
9. not shown for clari 035 000039 001 Page 16 of 38 MVA 1 0 4 25 2014 INSTALLATION ELECTRICAL DANGER WARNING Hazardous voltage Only qualified personnel must install the electrical service Dis connect and Lock Out all incoming power sources before connecting to electrical service WARNING This appliance must be permanently grounded in accordance with the National Electrical Code and local code requirements WARNING For use with copper conductors only Typical wiring diagrams are shown on the following pages FOR REFERENCE Always refer to the wir ing diagram on the air handling unit for actual wir ing NOTE CHECK MOTOR RATING PLATE FOR CORRECT LINE VOLTAGE Connect electrical service to unit Refer to unit wir ing diagram Power Wiring For power supply connection route field power wir ing L1 and L2 and connect either 1 Unit Without EH to field provided and installed disconnect switch and from switch to power entry unit side and to unit power leads inside the unit electrical section or 2 Unit With EH into the unit through power entry unit side and then to the factory installed pow er switch inside the electrical section see Fig ure 9 Note power switch looks like a circuit breaker but does not provide overload pro tection Power switch provided only with elec tric heater field kit or factory installed NOTE When electric heat greater than 10kW is pro vided two power supply circuits
10. 24 26 24 25 25 26 27 29 27 28 29 29 30 31 32 35 3 MVA IOM 1 0 4 25 2014 THIS PAGE INTENTIONALLY LEFT BLANK 035 000039 001 Page 4 of 38 MVA IOM 1 0 4 25 2014 DANGER NEVER enter an enclosed fan cabinet or reach into a unit while the fan is running LOCK OPEN AND TAQ the fan motor power dis connect switch before working on a fan Take fuses with you and note removal on tag Electric shock can cause personal injury or death LOCK OPEN AND TAQ the electric heat coil power disconnect switch before working on or near heat ers Failure to follow these warnings could lead to per sonal injury or death WARNING CHECK the assembly and component weights to be sure that the rigging equipment can handle them safely Note also the centers of gravity and any specific rigging instructions CHECK for adequate ventilation so that fumes will not migrate through ductwork to occupied spaces when welding or cutting inside air handling unit cabinet or plenum WHEN STEAM CLEANING COILS be sure that the area is clear of personnel DO NOT attempt to handle access covers and re movable panels on outdoor units when winds are strong or gusting until you have sufficient help to control them Make sure panels are properly se cured while repairs are being made to a unit DO NOT remove access panel fasteners or open access doors until fan is completely stopped Pres sure developed by a moving fan can cause exces sive force against th
11. 3 10942 035 000039 001 37 of 38 IOM 1 0 4 25 2014 MVA Series Air Handling Unit Installation Operation and Maintenance Manual 035 000039 001 MVA IOM 1 0 4 25 2014
12. AIR SENSOR ENTRY OPT ALT SCALE 1 16 18 24 30 36 42 48 60 EEN ww P 30 3 0 104 13 115 s Ee piss pra lias ies wo 212 224 223 re ia 20 16 16 mis om _ we a 512 202 253 14 va 78 4o 225 49 vasaras 559 222 273 212 76 40 244 58 127 579 242 sta a 252 76 40 283 58 158 PRODUCT INFORMATION IS SUBJECT TO CHANGE WITHOUT NOTICE gt 035 000039 001 Page 32 of 38 MVA IOM 1 0 4 25 2014 UNIT DIMENSIONS MVA18 60 Elec Heat Ready LH Drain Connections Configuration T E CENTER OF UNIT LOW VOLTAGE ENTRY ALT 1 625 PPLY AIR SENSOR ENTRY OPT 1 375 POWER ENTRY 18 24 30 36 42 48 60 COVER 1 125 19 19 Lee elite i lt 155 173 186 185 _9 190 21 2 22 4 223 b ve R 20 16 14 aan 3 4 FPT ______ won oischarceoucr mom a fs Te te pope ever ma ve va 7a ao ev PRODUCT INFORMATION IS SUBJECT TO CHANGE WITHOUT NOTICE 035 000039 001 Page 33 of 38 MVA 1 0 4 25 2014 UNIT DIMENSIONS MVA18 60 Elec Heat Ready RH Return Configurati
13. Pro fessional installers recognize the value of pro tecting customer assets against foreseeable events Customers who choose to avoid the cost of common protective measures waive their right to seek damages when those foreseeable events occur If the product is located above a living space or where damage may result from condensate overflow install a watertight pan of corrosion resistant metal beneath the unit to catch over flow which may result from clogged drains or from other reasons Provide proper drain piping for this auxiliary pan Consult local codes for additional precautions before installa tion inches of clearance This allows substan tial freedom in the positioning of the unit to best serve the requirements of the struc ture Unit Support Floor mounting Unit may be mounted on a housekeeping pad floor platform or plenum Provide a suitable isolation pad to minimize sound transmission to the structure CAU TION Make sure to allow enough eleva tion to permit construction of the conden sate trap Also allow enough elevation and clearance for opening the filter door removes to the front See Service Clear ances MVA IOM 1 0 4 25 2014 INSTALLATION NOTE Electronic Expansion Valve EEV must be ori ented vertically and is shipped for vertical cabi net orientation For horizontal cabinet orientation follow proce dure to rotate the EE V assembly Refer to Fig ure 2 WARNING FOR HOR
14. are required as shown on the wiring diagram Refer to nameplate or Electrical Ratings page 30 for FLA maximum overcurrent protection device MOPD and minimum circuit ampacity MCA Also refer to wiring diagram affixed to unit to make con trol and power wiring connections For new heater installation mark the nameplate label with the matching heater kW rating Label is located on the exterior of the front top panel NOTE Installer is responsible for power wiring and branch circuit over current protection Control Voltage Wiring Control voltage wiring may enter the unit at the con trol box located behind the blower access door or 035 000039 001 Page 17 of 38 DANGER NEVER enter an enclosed fan cabinet or reach into a unit while the fan is running LOCK OPEN AND TAG the fan motor power dis connect switch before working on a fan Take fuses with you and note removal on tag Electric shock can cause personal injury or death LOCK OPEN AND TAG the electric heat coil power disconnect switch before working on or near heat ers Failure to follow these warnings could lead to per sonal injury or death CAUTION Use only copper conductors for field installed elec trical wiring Unit terminals are not designed to accept other types of conductors Do not allow wiring to touch the refrigerant tubing compressor or any moving parts of the fan Make wiring connections in accordance with the system wiring system d
15. gt Hamess Connection Factory Wiring Field Wiring 3 Earth Ground DISC Disconnect Switch Elec Heat Strip YPICAL WIRING ELECTRIC HEAT ILS Limit Switch SEQ Sequencer DISC2 RED 217 12 OT O 208 240V CIRCUIT2 1 Phase bie x BLK 213 USE COPPER SUPPLY WIRES RED 216 RED 217 12 lt O he RED 209 gt RED 204 BLK 213 A gt lt RED 220 poses CIRCUIT1 p as FT 9 2 54 HTR3 4 4 lt BLK 205 VIO 603 BRN 604 A A Renate C Y JA 3 0 RED 208 RED 1 A 7 ED 209 6 BLK 210 HTR2 T BLK 205 _ ff BLKI206 A A A BLK211 REDI 12 lt 7 7 1 4 sat YEL 202 V N VIO 603 ORN 602 _ BRN 604 HTR1 9 COHHBC1 CX A A BLK 27 208 2 ORN 602 Ais NBRN 601 mmm pT BRN 601 S ON 1 CBC1 BLK 201 YEL 202 RED 204 LEGEND TITLE 208 240V 1 Phase 19 5 KW Electric Heat Section Harness Connection Factory Wiring Field Wiring Earth Ground psc TYPICAL WIRING ELECTRIC HEAT 035 000039 001 Page 23 of 38 MVA 1 0 4 25 2014 START UP Pre Startup Building Envelope All building windows and doors should be installed and closed before starting unit During summer construction avoid unit sweating by allowing for
16. motor Fig 16 and 17 Remove blower mounting bolts which secure the blower rails upward against the blower deck 2ea Remove motor wheel assembly from the AHU by sliding out Figure 18 See Figure 19 Loosen shaft set screw opposite motor side and motor mount tightening screw until motor can be removed Remove motor Install new motor Fig 20 tight en motor mount bolt then locate fan wheel and tighten shaft set screw Reverse steps 1 4 to reinstall fan Make sure that the two clips at the back hold the blower rails up against the blower deck opin fan by hand to make sure there is no rub bing or interference Close unit access doors remove lockout tag out and restore the unit to operation Page 27 of 38 MOTOR HARNESS amp CONNECTORS MOTOR HARNESS amp CONNECTORS Figure 17 MVA IOM 1 0 4 25 2014 DANGER NEVER enter an enclosed fan cabinet or reach into a unit while the fan is running LOCK OPEN AND TAG the fan motor power dis connect switch before working on a fan Take fus es with you and note removal on tag Electric shock can cause personal injury or death LOCK OPEN AND TAG the electric heat coil pow er disconnect switch before working on or near heaters Failure to follow these warnings could lead to per sonal injury or death MOTOR WU BLOWER 1 W SLIDES OUT Fan System Periodic Maintenance 1 The factory strongly recommends use of a Preven tive Maintenance program to ins
17. sors in correct locations for proper unit conditions LOCK OUT all power supplies before operation performing this procedure WARNING Coil sec 10 Re install wiring to EEV tion can be heavy use proper lifting equipment 11 Re install unit access panels 2 Isolate coil and reclaim refrigerant Disconnect 12 Return unit to service unit from piping Remove supply piping to allow access into the coil section from the front 3 Remove blower access door and coil access doors 4 Carefully remove temperature sensors from the coil and set them aside clear of the coil amp drain pan assembly Disconnect electronic expansion valve EEV wiring from the EEV 5 Remove 4 screws on the drain pan side of the cabinet right side shown in Fig 23 Remove 4 screws from coil support side of the cabinet left side shown in Fig 23 6 Slide coil amp drain pan assembly out of the unit Fig 19 7 Coil can be detached from drain pan using 5 16 driver 2 screws Coil can be detached from coil support using 5 16 driver 4 screws 8 Follow instructions in reverse to install new coil COIL SUPPORT x wen x a Figure 23 035 000039 001 Page 30 of 38 MVA 1 0 4 25 2014 UNIT ELECTRICAL RATINGS MVA Electrical Data Maximum Overcurrent 5 o x O gt lt UNIT FLA ELECTRIC HEAT AMPS Protective Device A gt lt lt N x wjr
18. 1100 1200 1300 1400 1500 Airflow SCFM Airflow SCFM MVA42 MVA48 0 50 0 50 0 45 g 0 45 5 0 40 lt 0 40 5 035 5 035 o 5 0 30 5 0 30 5 0 25 025 9 0 20 9 0 20 S S 0 15 a 0 15 0 10 0 10 5 0 05 5 0 05 0 00 0 00 800 1000 1200 1400 1600 1800 1000 1200 1400 1600 1800 2000 Airflow SCFM Airflow SCFM MVA60 0 50 045 0 40 o c 5 035 2 030 025 0 20 4 0 15 0 10 0 05 0 00 1200 1400 1600 1800 2000 2200 2400 Airflow SCFM 035 000039 001 Page 26 of 38 MVA 1 0 4 25 2014 DANGER NEVER enter an enclosed fan cabinet or reach into a unit while the fan is running LOCK OPEN AND TAG the fan motor power dis connect switch before working on a fan Take fus es with you and note removal on tag Electric shock can cause personal injury or death LOCK OPEN AND TAG the electric heat coil pow er disconnect switch before working on or near heaters Failure to follow these warnings could lead to per sonal injury or death SERVICE General Review Safety Considerations at beginning of these instructions Good safety habits are im portant tools when performing service proce dures To make speed measurements use a laser style tachometer Fan Motor Replacement WARNING Shut off motor power and lock out power supply Remove Blower Motor Assembly Procedure 1 2 035 000039 001 Disconnect wiring harness plugs from
19. AND SAVE FORLAT ER USE NITROGEN WILL DISCHARGE FROM COIL 3 REMOVE PIPING GROMMETS REMOVE LIQ UID INLET CAP FOR HORIZONTAL POSITION 4 REMOVE BLOWER PANEL LEFT AND RIGHT COIL PANELS 5 SECURE EEV BRACKET WITH WRENCH AND TURN COUPLING FLANGE NUT COUNTER CLOCKWISE WITH 3 4 WRENCH TO LOOSEN AND DISCONNECT COUPLING THE COU PLING TAIL NUT SHOULD BE ALLOWED TO TURN FREELY 6 REPOSITION EXPANSION VALVE ASSEMBLY AS SHOWN IN FIGURE 2d ENSURE EXPAN SION VALVE IS VERTICAL WITHIN 15 DEG WITH UNIT INSTALLED IN HORIZONTAL POSI TION TIGHTEN TO 10 12 FT LBS ET WITH WRENCH 8 ASAN ALTERNATIVE TO STEP 5 COUPLING MAY BE TIGHTENED UNTIL NO THREADS ARE SHOWING AND COUPLING IS BOT TOMED OUT THEN TURN AN ADDITIONAL 60 DEG OR ONE HEX FLAT TO TIGHTEN 9 REINSTALL FRONT PANELS GROMMETS AND PIPING PLUGS Figure 2c Vertical Orientation Panels Removed 035 000039 001 LEFT COIL PANEL 7 REATTACH COUPLING AND WHILE SECURING EEV BRACK EEV BRACKET EEV IN VERTICAL ORIENTATION Page 10 of 38 COIL STUBOUT PANEL LIQUID INLET VERT POSITION PIPING GROMMETS Figure 2b Vertical Orientation Figure 2d Horizontal Orientation Detail A EEV Detail COUPLING FLANGE NUT COUPLING TAIL PIECE MVA IOM 1 0 4 25 2014 INSTALLATION SERVICE CLEARANCES CLEARANCE DIMENSION INCHES 18 24 36 0 36 0 360 220 6 0 9 0 30 36 36 0 36 0 36 0 25 0 6 0
20. D WIRE 5 LIMIT SWITCH FACTORY WIRING sea HeatsequenceR TYPICAL WIRING MVA18 MVA24 OPTIONAL WIRING SW SWITCH WIRES BY OTHERS TRAN TRANSFORMER CHASSIS GROUND ITB TERMINAL BLOCK EARTH GROUND TIME DELAY RELAY 035 000039 001 Page 20 of 38 MVA 1 0 4 25 2014 INSTALLATION ELECTRICAL cont d TYPICAL WIRING DIAGRAN Unit sizes 30 36 42 48 amp 60 USE COPPER SUPPLY WIRES TC BLK 100 s 208 230V 5 s lt P WHT 517 WHT 514 BLK 516 8 BLK 513 BRN BRN SUCTION LINE RED RED AAH LIQUID LINE TB1 amp 3 WAY CONNECTOR ARE CLASS 2 YEL 506 YEL 504 GRN GRN ge m SAT TA BL PNL YEL ROOM ATR IL224B GRAMM C Rn GRN 102 Motor Speed Select Terminal Block TB2 and CBC2 Connector are Class 2 CBC2 gt 6 gt 1 2 gt 2 VIO gt 3 ORN 701 lt BLU 702 gt YEL 703 lt GRA 704 lt WHT 705 ECFAN ECM INTERFACE RED 509 BRN 508 10 510 BLU 518 YEL 519 GRA 520 WHT 521 TB2 Terminal 1 Highest Speed 1 TB2 Terminal 5 Lowest Speed 4 YEL 603 L2N GRNIYEL 602 G BLK 601 L1 BRN 700 lt BRN 700 un 5 YEL 603 3 8 5 TRAN1 g RED 107 NULLA RED SO CBC1 x 240 V IC RED 134 JC o 12 4 gt 3 o 5 lt gt x GRN 500 _ 2 SY 1 BLK 131 BLK 106
21. Electric Heat KW rated at 230V For 208V operation derate heater to 75 of 230V rating 2 Electric Heat complete with circuit breaker style power switch 3 14 5 and 19 5 kW shall have two supply circuits 035 000039 001 Page 6 of 38 MVA IOM 1 0 4 25 2014 PRODUCT NOMENCLATURE CONT D 10 6 208 230 1 60 ECM VE customer change transformer tap for 208V Code Selection 8 11 H control board amp low voltage interface Return Air Cabinet Options Unit Orientation Return Location Vertical Front RH Cond Drain Cnx or Horizontal Bottom Return Right Vertical Front LH Cond Drain Right Return Vertical Front RH Cond Diai Cn Left Return Horizontal Left or T Vertical Front LH Bottom Return Condensate Drain Cnx Note Right return horizontal orientation or left hand condensate drain connections require Universal drainpan selection See code 13 Fiberglass Universal Drainpan Galvanized Selection drain pan and cabinet insulation type D Fiberglass Universal Drainpan Stainless Steel Foil Face Fiberglass Universal Drainpan Galvanized Foil Face Fiberglass Universal Drainpan Stainless Steel Description Code election _ 14 P Panasonic 035 000039 001 Page 7 of 38 MVA IOM 1 0 4 25 2014 INSTALLATION Pre installation 1 Check items received against packing list 2 Do not stack unit components or accesso rie
22. IRED LEFT VIEW LEFT RETURN UNIT LEFT FILTER SERVICE CLEARANCE FILTER ACCESS CONDENSATE DRAIN TRAP CLEARANCE AS REQUIRED BLANK PANEL ON BOTTOM FRONT VIEW LEFT RETURN UNIT RETURN UNIT FILTER ACCESS DETAILS 7 00 MIN 1 05 BLANK PANEL ON BOTTOM CONDENSATE Z 5 2 2 PRAN THAF FRONT VIEW RIGHT RETURN UNIT FILTER ACCESS COIL SERVICE s s XX oo 55555550529 000000 SKK 72 oO 0 0 9 FILTER S lt 5 5 A 5 55 5 55 K SS 25252 5252 966 QS CONDENSATE DRAIN TRAP CLEARANCE AS REQUIRED FILTER SERVICE CLEARANCE RIGHT VIEW RIGHT RETURN UNIT RIGHT RETURN UNIT FILTER ACCESS DETAILS CLEARANCE UNIT DIMENSION INCHES SIZE D J 18 24 22 0 17 5 360 194 30 36 25 0 200 360 235 42 48 27 0 220 360 263 60 310 240 360 283 035 000039 001 Page 12 of 38 NOTES 1 THIS PAGE SHOWS CLEARANCES SPECIFIC TO SIDE RETURN UNITS REFER TO UNIT SERVICE CLEARANCES SHEET FOR OTHER REQUIRED CLEARANCES 2 FIELD RETURN DUCT IS NOT REQUIRED MVA IOM 1 0 4 25 2014 035 000039 001 INSTALLATION Install the unit so that it is level or pitches slightly 1 8 inch toward the condensate drain connection Anchor the unit to the plenum or platform through the
23. IZONTAL CABI NET ORIENTATION EEV MUST BE ROTATED TO VERTICAL POSITION Failure to reorient the EEV can result in im proper unit operation or equipment damage or dangerous condition 035 000039 001 Figure 1 Return Configurations and Unit Orientations NVd FILTER Digit 12 T Digit 12 T BOTTOM RETURN BOTTOM RETURN LEFT HORIZONTAL ORIENTATION VERTICAL ORIENTATION LEFT COND DRAIN CNX LEFT COND DRAIN CNX FILTER Digit 12 B Digit 12 B BOTTOM RETURN BOTTOM RETURN RIGHT HORIZONTAL ORIENTATION VERTICAL ORIENTATION RIGHT COND DRAIN CNX RIGHT COND DRAIN CNX DRAIN PAN NVd Digit 1221 Digit 12 R LEFT RETURN RIGHT RETURN VERTICAL ORIENTATION VERTICAL ORIENTATION RIGHT COND DRAIN CNX LEFT COND DRAIN CNX Page 9 of 38 MVA IOM 1 0 4 25 2014 INSTALLATION VERTICAL HORIZON TAL CONVERSION EEV ROTATION WARNING FOR HORIZONTAL CABINET ORIENTATION EEV MUST FRONT TOP PANEL Figure 2a Vertical Orientation BLOWER PANEL LIQUID INLET CAP HORIZ POSITION BE ROTATED TO VERTICAL POSITION Failure to reori ent the EEV in VERTICAL position can result in improp er unit operation or equip ment damage or dangerous condition CONVERSION PROCEDURE UNIT IS SHIPPED WITH NITROGEN CHARGE IF UNIT HAS ALREADY BEEN CHARGED WITH REFRIGERANT REMOVE RE FRIGERANT CHARGE PER LOCAL CODES BE FORE PERFORMING CONVERSION PROCE DURE 2 REMOVE PIPING PLUGS
24. MVA Series Air Handling Unit Installation Operation and Maintenance Manual MVA Series units are direct drive vertical and multi position Air Handlers delivering nominal cooling capacities of 1 5 to 5 tons Units may be specified with hot water or elec tric heating coils to meet space cooling loads or heating loads or both Three return air con figurations are available for maximum flexibil ity How to Use this Manual 2 This manual gives instructions regarding in stallation operation and maintenance for the 4 MVA Series air handling units i Use these instructions in conjunction with GENERAL other appropriate instructions including but Installation and maintenance are to be per not limited to those instructions supplied with formed only by qualified personnel who are fa the outdoor unit Installation must comply miliar with local codes and regulations and are with all applicable local codes experienced with HVAC equipment of this type WARNING Sharp edges coil surfaces and rotating fans are a potential injury hazard avoid contact WARNING Hazardous voltage Discon nect and Lock Out all incoming power sources before servicing or installing unit ELECTRIC SHOCK CAN CAUSE DEATH WARNING This equipment may be in stalled well above finished floor Use ex treme caution when working at heights UNPACKING CHECK FOR DAMAGE SAFETY WARNING Installer should pay particular attention to the fol
25. RAM Unit sizes 18 amp 24 USE COPPER SUPPLY WIRES BLK 100 208 230V ES 2 x wow w Q RED 101 TO BLOWER COMPARTMENT TB1 BLK 513 L WHT 514 WHT 517 U4 WHT 517 I WHT 514 BLK 516 BLK 516 9 BDLIOSIS BRN GRN BLK WHT ORN SUCTION LINE 21 m m WHT 3WAY RED LIQUID LINE TB1 amp 3 WAY CONNECTOR ARE CLASS 2 i sL E a 6 YEL 506 z YEL 504 z x GRN a GRN SAT TB2 Terminal 1 Highest Speed YEL ITB2 Terminal 5 Lowest Speed lt YEL 0772 Room CBC2 ECM INTERFACE 6 BRN 508 ATR IL224B N gt 1 Wk VIO 510 Sar 2 eem y R2 1 VIO lt TB2 gt BLUM15 N 5 ORN 701 _ 43 7 ORNI117 I R4 BLU 518 BLUTO2 _ 2 BLK 119 RN 102 YEL 519 YEL 703 14 GRA 520 GRA 704 BLK 104 RED 105 WHT 521 WHT 705 165 i BRN 1 BRN 700 FAN 7 YEL 604 MOTO SPIN T BLK 104 RED 105 RED 501 RED 501 RED 509 CBC1 706 134 e 1214 m gt B 3 208 V gt A 5 lt gt z __ 6 BLK 131 lt ernso2 BRN 502 BRN 700 YEL 604 1111 g e BLK 605 gt HARNESS CONNECTION DISC DISCONNECT RELAY Fu FUSE X INSULATE
26. bottom flange using 2ea 10 sheet metal screws on each side 4 screws total SEE NOTE 2 Ceiling Suspension Mount the unit in ceiling suspended horizontal orientation per suspen sion details Figure 4 Unit is NOT intended to be wall mounted Consult a qualified struc tural engineer for special mounting considera tions WARNING INSURE THAT THE UNIT QUATELY IS ADE SUPPORTED FROM STRUCTURE TO PREVENT DAMAGE OR INJURY CAUSED BY FALLING EQUIPMENT If uncertain about how to connect to the structure consult a qualified structural engineer Install the unit so that it pitches slightly 1 8 inch toward the condensate drain connec tion Condensate Drain Install a trapped condensate drain line at unit drain connection All MVA units have 3 4 in FPT con densate main and auxiliary drain connections Provide adequate trap clearance trap depth be neath the unit as indicated in Fig 3 Provide freeze up protection as required to insure reliable condensate drainage Freeze protection measures are customer supplied and installed Pipe to condensate drain using PVC or copper or other suitable material Pitch drain piping down ward at a minimum slope of 1 8 inch per foot Pipe auxiliary drain to tell tale drain location or floor drain to clearly indicate when condensate drain service is required Alternately use a field provided condensate overflow detection device in the auxiliary drain connection to
27. copper lines coil etc for internal or hidden damage Return Air and Unit Orientation Units may be positioned in several configura tions depending on the return air configura tion selected see Figure 1 NOTE Right and left return units are not recommended for horizontal installation Service Clearance The fan coil is completely serviceable from the front Units are approved for 0 zero Page 8 of 38 WARNING AUXILIARY RECOMMMENDED This product has an auxiliary condensate drain which should be piped to a condensate overflow sensor or safe drain location or both to protect the equipment and property from damage in the case of condensate overflow DRAIN PAN In addition the International Mechanical Code IMC section 307 2 3 requires the use of auxil iary drain pans Many municipalities have adopted this code This practice represents the standard for profes sional installation whether or not this code has been adopted in a specific municipality or terri tory As such water damages that would have been prevented had an auxiliary pan been de ployed will not be considered for compensation This position is taken regardless of whether the source of the moisture was specified as a po tential failure mode in the applicable building code or not A freeze burst cracked drain pan failed weld or corrosion induced leak are some of the potential failure modes that are mitigated when an auxiliary pan is properly installed
28. dures for the system as required by the condensing unit Fan Airflow Step Up If the duct system ESP is higher than planned and increased Air Handler ESP is needed shift the terminals as shown in Figure 15 Refer to Airflow tables and curves for airflow performance 035 000039 001 Page 24 of 38 FORWARD CURVED Fig 14 Fan Wheel Rotation FORWARD CURVED FAN MVA IOM 1 0 4 25 2014 Figure 15 Increasing ESP setting Stay Shift all three down As Shipped Higher Fan Setting Areas not recommend for operation due to excess velocity 0 590001 030 0 400 050 _____ Fan Setting RPM SCFM WATTS RPM SCFM WATTS RPM 5 WATTS RPM SCFM WATTS RPM SCFM 5 RPM SCFM_ WATTS HighTop 969 833 188 1022 804 197 1067 780 206 1132 743 215 113 71 222 1201 666 902 774 156 955 749 163 1016 717 173 1067 690 181 1102 66 193 114 611 201 Medium 898 772 152 960 737 160 1012 711 169 1091 669 176 1132 633 182 1158 569 187 149 gt 0 000 0 10 020 030 0 400 0000 0 40 0 500 7 Fan Setting RPM SCFM WATTS RPM SCFM 5 RPM SCFM WATTS RPM SCFM WATTS RPM SCFM 5 RPM 5 WATTS HighTop 1236 1052 394 1265 1034 396 1301 996 383 1327 953 345 1351 897 340 1430 838 261 302 96 833 188
29. e for breaker style power 10 Install the heater access panel switches 11 Install the silicone cover boot over the top of 4 Remove SAT sensor and sensor holder from the power switches This protects them from dust heater bulkhead and reposition on unit discharge buildup The switches may be activated through the ductwork routing through auxiliary SAT sensor flexible boot material hole on top panel 12 Mark the nameplate label with the matching 5 Install SAT feet after the first 90 degree turn heater kW rating Label is located on the exterior in the discharge ductwork the front top panel c Remove plate on the heater bulkhead 4 13 Update EEPROM settings to values shown in Screws the table Refer to test run manual for detailed in 7 Install heater by carefully supporting the heater structions for changing the EEPROM settings and inserting it into the opening in the heater bulk head NOTE Make sure to guide the pin into the hole at the back of the heater shroud Secure the 0001 heater to the bulkhead with 4 screws 8 Connect 2 wiring harnesses male to the 0002 matching female receptacles in the blower deck HEATER SHROUD Fig 8 Heater Accessory Installed HEATER SHROUD HEATER ASSEMBLY POWER SWITCH ES HEATER ACCESS PANEL COVER BOOT HEATER BULKHEAD Fig 7 Heater Accessory Removal right side and heater access
30. e panel which can injure per sonnel DO NOT work on dampers until their operators are disconnected BE SURE that fans are properly grounded before working on them Failure to follow these warnings could result in per sonal injury or equipment damage 035 000039 001 Page 5 of 38 MVA IOM 1 0 4 25 2014 PRODUCT NOMENCLATURE Unit Type Size Description 01 02 Direct Drive Multiposition air handling unit Generation Series tion Code selection S 03 Revision Level Code Selection NOM s unos _ _ _ __ O O OSO unos _ _ ooon _ _ _ O O O o _ _ O O feos O O eo ooon o Primary Coil Type Descripti scription Code Selection 06 F 4 ROW DX with electronic expansion valve R 410a Heating Coil Descrip scription Code Selection Electric Heat Ready field installed kit Top will be provided 3 0 kW single phase w circuit breaker only 1 stage all sizes 5 0 kW single phase w circuit breaker only 1 stage all sizes 6 0 kW single phase w circuit breaker only 1 stage all sizes 8 0 kW single phase w circuit breaker only 1 stage all sizes 9 5 kW single phase w circuit breaker only 1 stage all sizes 14 5 kW single phase w circuit breaker only 1 stage size 30 to 60 19 5 kW single phase w circuit breaker only 1 stage size 42 48 60 1
31. frigerant system Until the piping is complete recap the system and charge with nitrogen at the end of each workday Clean all piping connections before soldering joints Failure to follow these procedures could result in Fig 5 Heater Accessory Installed personal injury or equipment damage right side panel not shown Refrigerant Piping Refrigerant Coils Direct expansion coils have liquid and suction line connections through the front of the cabinet CAUTION Use proper care when brazing including use of heat sink wet cloth or other method to pre vent damage to liquid line and suction line components Size and install refrigerant lines in accordance with the condensing unit manufacturer s in structions Provide insulation on the suction line to prevent condensation Provide insula tion on the liquid line if unit to be used for heat pump service or if otherwise required Electric Heater Accessory The electric heater may be factory installed or field installed See Figures 5 through 8 Fig 6 Heater Accessory Installed right side and heater access panels Removal Procedure not shown To remove the electric heater 1 Disconnect and lock out electrical power from the unit Remove heater access panel Disconnect power wires from the power switch DANGER MAKE SURE there is no voltage on these wires before disconnecting DANGER 2 Disconnect 2 harness connectors at the m blower deck WARNING Hazardous v
32. gradual pull down use reduced capacity and use maximum available airflow Temperature Controls Check that unit is connected to the controls system and communicating properly Outside Air and Freeze Protection WARNING Insure that the property is protected against freezing conditions Failure to provide freeze protection may result in property damage Freeze protection measures are customer provided and installed and include but are not limited to low limit thermostats automatic temper ature controls and outside air dampers Startup 1 Insure electrical installation agrees with the unit name plate voltage branch circuit protection wire size 2 Close all panels and access doors Make sure filter me dia is clean before starting unit Replace filter if neces sary 3 Verify that discharge ductwork and input plenum are in place and secure 4 Apply power to unit If unit is equipped with on board power switch es turn switch es to the On position 5 Insure that controls system has power and is operational 6 Force control system to send fan on signal and speed signal Refer to unit wiring diagram and electrical section for fan speed control arrangement 7 Fan should start and run Make sure fan operates with out significant noise or vibration 8 Allow control system to start condensing unit or as re quired for the installation 9 Complete the checklist on the Start Up Report 10 Follow additional startup proce
33. iagram and these instruc tions Wrong wiring may cause improper operation or unit damage Unauthorized changes in the internal wiring can be very dangerous The manufacturer will accept no responsibility for any damage or malfunction that as a result of such unauthorized changes other convenient location Control voltage wiring leads exit the bottom of the control box and are ready for field connection CAUTION To prevent malfunction of the air condi tioner caused by electrical noise route control wiring and inter unit control wiring SEPARATELY FROM THE POWER WIRING Figure 9 Unit with Electric Heat MVA IOM 1 0 4 25 2014 INSTALLATION ELECTRICAL General Provide strain relief where field wiring passes through cabinet Wiring within the cabinet has been positively located and supported so that it does not pass over sharp metal edges or come in contact with moving parts After servicing position wiring properly in the original supports All field installed wiring including the electrical ground MUST comply with the National Electrical Code NEC as well as applicable local codes In addition all field wiring must conform to the Class temperature limitations described in the NEC Refer to factory wiring diagrams installed in the unit Use the MCA and MOPD from the nameplate or electric heat nameplate or Electrical Ratings page 30 to size power supply wiring and overcur rent protection device Installa
34. lowing words NOTE intended to clarify or make instal lation easier CAUTION given to prevent equipment Immediately inspect each unit for dam age upon receipt e Inspect units for external and concealed damage immediately damage WARNING t0 alert installer that personal injury and or equipment damage may result if installation procedure is not properly followed e File any damage claims in accordance with the Freight Damage Policy and Terms and Conditions e Do not repair damaged units without written authorization e Protect stored units from damage 035 000039 001 Page 1 of 38 MVA IOM 1 0 4 25 2014 THIS PAGE INTENTIONALLY LEFT BLANK 035 000039 001 Page 2 of 38 MVA IOM 1 0 4 25 2014 MVA Series Air Handling Unit Installation Operation and Maintenance Manual Installation Start Up and Service Instructions Topic SAFETY CONSIDERATIONS PRODUCT NOMENCLATURE UNPACKING INSTALLATION Pre installation Rigging Unpackaging Service Clearances Return Air amp Unit Orientation Vertical to Horizontal Conversion EEV Unit Suspension or Floor Mount Condensate Drain Ductwork Refrigerant Piping Electric Heater Accessory Electrical START UP Fan Airflow Step Up Airflow Data SERVICE Fan amp Fan Motor Filters Access Panels Coil amp Drain Pan Service ELECTRICAL RATINGS DIMENSIONS Startup Report Page 3 of 38 Page 1 5 6 7 8 8 8 8 8 8 11 12 9 10 8 13 14 13 13 15 15 16 17 23
35. oltage Only qualified 3 Remove 2 screws holding heater support personnel must install the electrical service Dis feet to the blower deck connect and Lock Out all incoming power sources 4 Remove 4 screws that mount the heater to before connecting to electrical service the heater bulkhead Handle heater carefully to avoid damaging the wire heating elements WARNING This appliance must be permanently Remove heater from the unit grounded in accordance with the National Electrical Code and local code requirements WARNING For use with copper conductors only 035 000039 001 Page 15 of 38 MVA 1 0 4 25 2014 INSTALLATION DANGER Install Procedure WARNING Hazardous voltage Only qualified To install the electric heater personnel must install the electrical service Dis 1 Disconnect and lock out electrical power from connect and Lock Out all incoming power sources the unit Remove heater access panel Discon before connecting to electrical service nect field power wires from the unit power wires DANGER MAKE SURE there is no voltage 9 Connect field wiring to the breaker style power supply to the unit before proceeding switches on the front of the heater WARNING 2 Disconnect and discard 1 harness connector at sure to provide the appropriate wire size and the blower deck branch circuit protection as required by the unit Remove blank plate from heater access panel nameplate covers square hol
36. on R E DE SZ S CENTER OF UNIT LOW VOLTAGE ENTRY ALT 1 0 SCALE 1 16 18 24 30 36 42 48 60 x 12 5 375 Q 87510W 5 aS f TT ss LS 8 104 103 115 br iss 173 18 6 185 190 21 2 22 4 223 EH DISCONN COVER OPT Cond Aux Nom wwe 5 gt 6 5 8 5 PIGET aeaea c 2 19 2 163 0 6 lt lt gt I t M J Nm 8 2 o I gt C Je e oO 283 58 15 4 2858 PERDIET INFORMATION 5 SUBJECT TO CHANGE WITHOUT 035 000039 001 Page 34 of 38 MVA IOM 1 0 4 25 2014 UNIT DIMENSIONS MVA18 60 Elec Heat Ready LH Return Configuration L CENTER OF UNIT LOW VOLTAGE ENTRY ALT 1 625 SUPPLY AIR SENSOR ENTRY OPT SCALE 1 16 T 18 24 30 36 42 48 60 875 1 12 19 19 19 19 emm 59104 os n5 P pss vs 185 so ma za 223 re 49 gt E 48 53 4 9 gt Cond and Aux Drain 4 FP T DEPTH s aude ELECTRICAL CONN RETURN DUCT a 219 PRODUCT INFORMATION IS SUBJECT TO CHANGE WITHOUT NOTICE O 035 000039 001 Page 35 of 38 MVA 1 0 4 25 2014
37. provide alarm or other controls action when the drain pan fills to the level of the auxiliary drain Placing Unit In Ductwork 1 Utilize flexible transitions on supply and return connections to reduce noise and vibration trans mission to the structure AHU CABINET DRAIN PAN bw CONDENSATE DRAIN SYSTEM NOT TO SCALE MAINTAIN THESE DIMENSIONS FOR ADEQUATE TRAP SEAL A z 3 5 MINIMUM B 2 0 MINIMUM NOTES 1 Page 13 of 38 CONDENSATE DRAIN PIPING RECOMMENDATIONS A MINIMUM 3 4 PIPE SIZE B COPPER OR PVC PIPE MATERIAL C USE DIELECTRIC UNION FOR DISSIMILAR METALS D INSULATE PER PROJECT SPECIFICATIONS PAD OR PLENUM HEIGHT AS REQUIRED TO INSTALL TRAP AND CONDENSATE DRAIN PIPING AVOID BLOCKING FILTER SERVICE ACCESS WHEN INSTALLING CONDENSATE DRAIN PIPING Fig 3 Condensate Drain 2 When the connecting return air duct is smaller than the coil inlet opening construct the transition piece so that the vertical and horizontal dimensions of the transition piece do not increase more then one inch for eve ry seven inches of length of the transition piece 2 Provide at least three feet of straight duct work preceding the unit inlet Duct Insulation and Vapor Proofing Properly select and install duct insulation as required by the application All externally insulated duct work must have an adequate vapor seal for summer opera tion This is particularly important where the duct i
38. s during storage Stacking can cause damage or deformation 3 If unit is to be stored for more than 2 weeks prior to installation observe the following precautions a Choose a dry storage site that is rea sonably level and sturdy to prevent un due stress or permanent damage to the unit structure or components Do not store unit on vibrating surface Damage to stationary bearings can occur Set unit off ground if in heavy rain area b Remove all fasteners and other small parts from jobsite to minimize theft Tag and store parts in a safe place until needed c Cover entire unit with a tarp or plastic coverall Extend cover under unit if stored on ground Secure cover with adequate tie downs or store indoors Be sure all coil connections have pro tective shipping caps d Monthly Remove tarp from unit en ter fan section through access door or through fan inlet and rotate fan and motor slowly by hand to redistribute the bearing grease and to prevent bearing corrosion Rigging Do not remove shipping skids or protective covering until unit is ready for final placement Use slings and spreader bars as ap plicable to lift unit Do not lift unit by coil connec tions or headers 035 000039 001 Do not remove protective caps from coil piping connections until ready to connect piping Unpackaging 1 Remove all packaging and any foreign mate rial from unit 2 Check blower wheel for free rotation 3 Check
39. s exposed to highly humid conditions in such places as attics vented crawl spac es unconditioned basements and utility rooms The vapor seal prevents condensa tion of moisture in the insulating material and subsequent loss of its insulating value MVA IOM 1 0 4 25 2014 Figure 4 CEILING SUSPENSION DETAILS Sg114 OZ SIN 3000301 13 31 15 SI ANY LHOISH 1Snf Qv SLNN ASN NMOHS ONIS LAALSINA FANDIS 375 NO QN343Q TIM 1335 2 JO INN ONITIVISNI 330339 SLYOddNS LNALSINN N33M138 3dV1 13 90 338802 TIVISNI 2715 NO QN3d30 HION31 NMOHS SNOISN3WICQ NIVLNIVW H15ON31 OL LNALSINA 102 LINN 8805 303 1 51341121815 ONIQOTInS 330SN3 G3ATIVISNI 5 91315 aav SIVISSLYW NOLVTIVISNI SALON 9 1415 v W130 9 1 6 NIW VO 91 g S 8 5 LOALSINA 04 53 Wall NN NN 8 __ pum MVA IOM 1 0 4 25 2014 Page 14 of 38 035 000039 001 INSTALLATION CAUTION Direct expansion coils are shipped pressurized with dry nitrogen Release pressure from the coil through valves in protective caps before remov ing caps Do not leave piping open to the atmosphere un necessarily Water and water vapor are detri mental to the re
40. tion must comply with NEC and local codes For communicating controls refer to Figures 10 through 13 for max lengths sizing and intercon DANGER WARNING Hazardous voltage Only qualified personnel must install the electrical service Dis connect and Lock Out all incoming power sources before connecting to electrical service WARNING This appliance must be permanently grounded in accordance with the National Electrical Code and local code requirements WARNING For use with copper conductors only CAUTION Loose wiring may cause the terminal to overheat or result in unit malfunction or cause a fire hazard Insure that all wiring is tightly connected nections Refer to the condensing unit opera tion manual for more details Figure 10 Building System Wiring Diagram multiple indoor amp outdoor units Indoor unit No 1 Power supply L1 o Fo 208 230V 60Hz 1 PH 2 Outdoor unit INV unit Remote Ground Controller B apa d BLK O O Power supply L1 208 230V 60Hz 1 PH L2 Remote Controller Group control Power supply L1 208 230V 60Hz 1 2 Ground Indoor unit No n Power supply L1 208 230V 60Hz 1 L2 Remote Controller ei WHT wHT WHT CONNECTOR 2P WHT 035 000039 001 Page 18 of 38 Power supply 230V 60Hz 3 PH Outdoor unit INV unit
41. ure that the unit operates safely and efficiently 2 Motor bearings are permanently sealed and do not require lubrication 3 Clean the fan s flow area maintenance interval in accordance with the degree of contamination 4 The fan wheel can be cleaned with a moist cloth 5 Do not use any aggressive paint solvent cleaning agents when cleaning 6 Never use a high pressure cleaner or water spray for cleaning particularly when the fan is running Coil Cleaning DETERGENT Spray mild detergent solution on coils with garden type sprayer Rinse with fresh water Check to ensure condensate line is free Excess water from cleaning may flood unit if condensate line is plugged 035 000039 001 Page 28 of 38 MVA IOM 1 0 4 25 2014 SERVICE Filters Filters FILTER SECTIONS Open or remove filter panel to replace old filter with a new filter See physical data tables for filter data See Figure 21 Figure 21 035 000039 001 Figure 22 Access Panels The 3 sections of the unit can be reached using the front access panels removable using 5 16 socket or driver or flat head screwdriver See Figure 22 Page 29 of 38 MVA IOM 1 0 4 25 2014 SERVICE Coil Removal and Reinstallation Procedure 1 Perform procedure on the ground for safety f 9 Re install sensors back in original posi working at heights USE EXTREME CAUTION ob tions CAUTION Be sure to place sen serve all FALL SAFETY considerations Under all

Panasonic MVA Series Air Handling Unit Service Manual

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