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34

START--UP CHECKLIST

(Remove and Store in Job Files)

I. PRELIMINARY INFORMATION

MODEL NO.:
SERIAL NO.:
DATE:
TECHNICIAN:

II. PRESTART--UP (Insert check mark in box as each item is completed)

( ) VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT
( ) REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS
( ) CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS
( ) CHECK THAT INDOOR (EVAPORATOR) AIR FILTER IS CLEAN AND IN PLACE
( ) VERIFY THAT UNIT INSTALLATION IS LEVEL
( ) CHECK FAN WHEEL, AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS

III. START--UP
ELECTRICAL

SUPPLY VOLTAGE
COMPRESSOR AMPS
INDOOR (EVAPORATOR) FAN AMPS

TEMPERATURES

OUTDOOR (CONDENSER) AIR TEMPERATURE

DB

RETURN--AIR TEMPERATURE

DB

WB

COOLING SUPPLY AIR

DB

WB

HEAT PUMP SUPPLY AIR __________________
ELECTRIC HEAT SUPPLY AIR_______________

PRESSURES

REFRIGERANT SUCTION

PSIG, SUCTION LINE TEMP*

REFRIGERANT DISCHARGE

PSIG, LIQUID TEMP

{

( ) VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

* Measured at suction inlet to compressor

{

Measured at liquid line leaving condenser.

Copyright 2015 Carrier Corp.

S

7310 W. Morris St.

S

Indianapolis, IN 46231

Edition Date: 10/15

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Catalog No: 50EZ---12SI

Replaces: 50EZ--- 11SI

50E

Z

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A

Summary of Contents for COMFORT 50EZ-A30

Page 1: ...or 28 Outdoor Coil Indoor Coil Condensate Drain Pan 29 Outdoor Fan 29 Electrical Controls and Wiring 31 Refrigerant Circuit 31 Indoor Airflow 32 A09034 Fig 1 Unit 50EZ A Metering Devices TXV Piston 32...

Page 2: ...e and into the unit base rails When installing large base units onto the common curb the screws must be installed before allowing the full weight of the unit to rest on the curb A minimum of six screw...

Page 3: ...lifter to the load and adjustment of the lifts to adapt to various sizes or kinds of loads 2 Instruction in any special operation or precaution 3 Condition of the load as it relates to operation of th...

Page 4: ...4 A150587 Fig 2 50EZ A30 36 Unit Dimensions 50EZ A...

Page 5: ...5 A150588 Fig 3 50EZ A42 60 Unit Dimensions 50EZ A...

Page 6: ...B large base IN mm C IN mm D IN mm E IN mm F IN mm G IN mm H IN mm Small or Large CPRFCURB010A00 11 279 10 254 14 356 16 406 47 8 1214 32 4 822 2 7 69 30 6 778 46 1 1170 CPRFCURB011A00 14 356 Large C...

Page 7: ...l supporting unit WARNING Lifting holes are provided in base rails as shown in Fig 2 and 3 1 Leave top shipping skid on the unit for use as a spreader bar to prevent the rigging straps from damaging t...

Page 8: ...Association SMACNA and Air Conditioning Contractors Association ACCA minimum installation standards for residential heating and air conditioning systems 5 Secure all ducts to building structure Flash...

Page 9: ...oltage and or phase imbalance 4 Do not damage internal components when drilling through any panel to mount electrical hardware conduit etc CAUTION ELECTRICAL SHOCK HAZARD Failure to follow this warnin...

Page 10: ...do not have a matching receptacle cut the 24V wires from the electric heater plug strip the ends and wire nut together to match the schematic connections If the electric heater 24V wires do not have a...

Page 11: ...e in mm Motor HP 1000 10x10 254x254 1 2 1200 11x10 279x254 3 4 1400 11x10 279x254 3 4 1600 11x10 279x254 1 0 1800 11x10 279x254 1 0 HIGH PRESSURE SWITCH psig Cutout Reset Auto 650 15 420 25 LOSS OF CH...

Page 12: ...12 A11006 Fig 11 Connection Wiring Schematics 208 230 3 60 50EZ A...

Page 13: ...13 A11005 Fig 11 Cont Ladder Wiring Schematics 208 230 3 60 50EZ A...

Page 14: ...14 A10195 Fig 12 Connection Wiring Diagram 460 3 60 50EZ A...

Page 15: ...15 A10195 Fig 12 Cont Ladder Wiring Diagram 460 3 60 50EZ A...

Page 16: ...ontrol in OFF position Observe that blower motor starts when FAN mode is placed in FAN ON position and shuts down when FAN MODE switch is placed in AUTO position 2 Thermostat When the room temperature...

Page 17: ...minimum of 15 minutes before checking or adjusting refrigerant charge IMPORTANT When evaluating the refrigerant charge an indicated adjustment to the specified factory charge must always be very mini...

Page 18: ...f of the desired speed tap wire Refer to Table 3 for color coding for the normal cooling fan speed and place desired speed tap wire on HIGH on the interface board 5 Refer to airflow tables Table 4 to...

Page 19: ...AL2 DCR QCR QC1 C RL 01 G1 G2 Z1 A7 R9 AB A15 C4 C9 C0 QIL Z2 06 04 U1 C3 R4 RL4 JWZ C7 D5 D3 R3 R5 R6 R2 JW5 QCB Y R W2 Y C W3 W3 W2 W2 C JW4 P2 JW3 P4 P1 W2 W3 Y2 Y1 Y DH G C R SSTZ 8 P3 SDL 24VAC...

Page 20: ...1449 1411 1362 1313 1278 1231 1188 High Black CFM 1705 1643 1607 1568 1518 1483 1448 1404 1360 50EZ A48 Low Blue CFM 1402 1351 1311 1263 1224 1172 1136 1080 1041 Med Low Pink CFM 1457 1404 1367 1318...

Page 21: ...274 284 295 302 315 327 331 BHP 0 27 0 29 0 29 0 30 0 32 0 32 0 34 0 35 0 35 50EZ A36 Low Blue CFM 1277 1215 1147 1094 1045 992 932 874 826 757 WATTS 285 289 299 305 314 319 328 335 347 352 BHP 0 31 0...

Page 22: ...1 0 42 0 44 High Black CFM 1775 1736 1696 1660 1622 1588 1557 1516 1472 1426 WATTS 371 386 401 410 424 439 453 468 483 497 BHP 0 40 0 41 0 43 0 44 0 45 0 47 0 49 0 50 0 52 0 53 50EZ A48 Low Blue CFM 1...

Page 23: ...S 569 579 597 607 623 639 648 665 674 663 BHP 0 61 0 62 0 64 0 65 0 67 0 69 0 69 0 71 0 72 0 71 MedHigh Orange CFM 2178 2148 2105 2073 2036 2002 1967 1919 1845 1751 WATTS 674 691 703 717 733 743 758 7...

Page 24: ...FM 12x20x1 12x20x1 305x508x25 305x508x25 2 5 3 0 0 09 0 14 0 16 0 18 0 25 0 28 0 3 1200 1800 CFM 16x24x1 14x24x1 406x610x25 356x610x25 3 5 4 0 0 10 0 11 0 12 0 13 0 14 0 16 0 16 1500 2200 CFM 16x24x1...

Page 25: ...0 00 0 02 0 04 0 06 0 08 0 09 0 11 0 13 0 15 0 17 0 19 Electric Heat Pressure Drop Table IN W C Large Cabinet 42 60 STANDARD CFM SCFM 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2...

Page 26: ...O EQUIPMENT OWNER Consult your local dealer about the availability of a maintenance contract PERSONAL INJURY AND UNIT DAMAGE HAZARD Failure to follow this warning could result in personal injury or de...

Page 27: ...cycles Step 2 Outdoor Coil Indoor Coil and Condensate Drain Pan Inspect the condenser coil evaporator coil and condensate drain pan at least once each year The coils are easily cleaned when dry theref...

Page 28: ...28 B A150586 Fig 16 Cooling Charging Table Subcooling 50EZ A...

Page 29: ...trols and wiring replace all the panels Start the unit and observe at least one complete cooling cycle to ensure proper operation If discrepancies are observed in operating cycle or if a suspected mal...

Page 30: ...h Step 11 Copeland Scroll Compressor Puron Refrigerant The compressor used in this product is specifically designed to operate with Puron R 410A refrigerant and cannot be interchanged EXPLOSION HAZARD...

Page 31: ...n a dip tube to allow liquid refrigerant to flow from cylinder in upright position For cylinders equipped with a dip tube charge Puron units with cylinder in upright position and a commercial metering...

Page 32: ...ctive run start capacitor overload or start relay Determine cause and replace Defective thermostat Replace thermostat Faulty condenser fan motor or capacitor Replace Restriction in refrigerant system...

Page 33: ...ls S Vacuum pumps will not remove moisture from oil S Do not use liquid line filter driers with rated working pressures less than 600 psig S Do not leave Puron suction line filter driers in line longe...

Page 34: ...TIGHTNESS III START UP ELECTRICAL SUPPLY VOLTAGE COMPRESSOR AMPS INDOOR EVAPORATOR FAN AMPS TEMPERATURES OUTDOOR CONDENSER AIR TEMPERATURE DB RETURN AIR TEMPERATURE DB WB COOLING SUPPLY AIR DB WB HEA...

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