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50ZH024-060
Packaged Heat Pump Units
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Installation, Start-Up and Service Instructions
NOTE: Read the entire instruction manual before starting the DEFROST..........................................................................15
installation. ELECTRIC RESISTANCE HEATING............................15
MAINTENANCE.........................................................................15
TABLE OF CONTENTS
Air Filter.............................................................
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equipment, pay attention to precautions in the literature, tags, and beyond the unit casing on the 2 sides. The duct connection side and labels attached to the unit, and other safety precautions that may condensate drain connection sides should be flush with the edge of apply. the flat surface. Follow all safety codes. Wear safety glasses and work gloves. Use A 6-in. wide gravel apron should be used around the flat surface to quenching cloth for unbrazing operations. Have fire extinguisher preve
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REQUIRED CLEARANCE TO COMBUSTIBLE MATL. INCHES [mm] TOP OF UNIT.........................................................................................0 DUCT SIDE OF UNIT.............................................................................0 SIDE OPPOSITE DUCTS ......................................................................0 BOTTOM OF UNIT.................................................................................0 NEC. REQUIRED CLEARANCES. INCHES [mm] BETWEEN UNITS, POWER EN
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REQUIRED CLEARANCE TO COMBUSTIBLE MATL. INCHES [mm] TOP OF UNIT.........................................................................................0 DUCT SIDE OF UNIT.............................................................................0 SIDE OPPOSITE DUCTS ......................................................................0 BOTTOM OF UNIT.................................................................................0 NEC. REQUIRED CLEARANCES. INCHES [mm] BETWEEN UNITS, POWER EN
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REQUIRED CLEARANCE TO COMBUSTIBLE MATL. INCHES [mm] TOP OF UNIT.........................................................................................0 DUCT SIDE OF UNIT.............................................................................0 SIDE OPPOSITE DUCTS ......................................................................0 BOTTOM OF UNIT.................................................................................0 NEC. REQUIRED CLEARANCES. INCHES [mm] BETWEEN UNITS, POWER EN
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INSTALL FLANGES FOR DUCTWORK CONNECTIONS (50ZH060 ONLY) The 50ZH060 units are shipped with flanges which must be field-installed on the unit. To install unit flanges: 1. Five pieces of flange are shipped on the return-air opening of the unit. Remove the flanges from the shipping position (See Fig. 5). Screws are field-supplied. 2. One piece of flange is used as it is shipped (straight). Bend the other 4 pieces at right angles. 3. Install the straight flange on the right side of the return-air op
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Unit removes condensate through a 1 3/64-in. ID hole (using 3/4-in. OD piping or tubing) which is located at the end of the unit. Failure to follow these precautions could result in damage to See Fig. 2-4 for location of condensate connection. the unit being installed: 1. Make all electrical connections in accordance with NEC ANSI/NFPA (latest edition) and local electrical codes 19.17† 3.92† governing such wiring. In Canada, all electrical connec- tions must be in accordance with CSA standard C2
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Table 1 — Physical Data UNIT 50ZH 024 030 036 042 048 060 OPERATING WEIGHT (lbs) 232 254 277 295 328 368 COMPRESSOR TYPE Scroll R-22 REFRIGERANT Charge (lb) 3.7 5.8 5.9 6.6 9.1 9.7 REFRIGERANT METERING DEVICE Acutrol™ System Copper Tubes, Aluminum Plate Fins OUTDOOR COIL Rows...Fins/in. 1...17 2...17 1...17 2...17 2...17 2...17 Face Area (sq ft) 7.9 6.7 11.1 9.3 11.1 12.7 Propeller OUTDOOR-FAN MOTOR CFM 1800 2000 2600 2600 2600 3200 Nominal Rpm 825 1100 1100 1100 1100 1100 Mot
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4. Connect the RED lead to the BLK wire from which the ORG HIGH-VOLTAGE LOW-VOLTAGE POWER WIRING WIRING ENTRY lead was disconnected. Insulate with wirenut from Step 1. ENTRY HOLE HOLE 5. Using the wirenut removed from the RED lead, insulate the loose terminal on the ORG lead. 6. Wrap the wirenuts with electrical tape so that the metal terminals cannot be seen. Indoor blower-motor speeds may need to be changed for 208-v operation. Refer to Indoor Airflow and Airflow Adjustments section. (See Tabl
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UNIT GROUND GROUND C BRN LEAD SINGLE-PHASE O L BLK ORN CONNECTIONS 3-PHASE TO DISCONNECT CONNECTIONS R L YEL PER NEC RED TO DISCONNECT PER NEC L G BLU GRN Y C00012 Fig. 13—Line Power Connections YEL E WHT W2 THERMOSTAT UNIT CONTROL POWER AND SUBBASE SPLICE BOX C99056 Fig. 14—Control Connections Step 1—Check for Refrigerant Leaks COMPRESSOR ROTATION On 3–Phase units it is important to be certain compressor is LOCATE AND REPAIR REFRIGERANT LEAKS AND rotating in the proper direction. To determine w
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C01022 Fig. 15A—Typical Unit Electrical Diagram (208/230–1–60) charts to determine what the suction temperature should be. If HEATING MODE CHARGE suction temperature is high, add refrigerant. If suction temperature Do not attempt to adjust charge by cooling methods while in heat is low, carefully recover some of the charge. Recheck the suction pump heating mode. Recover refrigerant and weigh in according to pressure as charge is adjusted. unit data plate refrigerant data. Example: (See Fig. 16)
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BRN (COMMON) C VIO (STEP 2) W1 WHT ( STEP 1) W1 BLK CONTACTOR 2 TO BRN YEL UNIT POWER WIRING YEL YEL FUSE BLOCK CONTACTOR 1 AUTO-LIMIT EL 1 YEL F3 BRN BLK EL 2 YEL YEL YEL F4 BLK L2 EL 3 BLK YEL YEL BLK F1 L1 BLK F2 C00014 Fig. 15B—Accessory Electric Heater Wiring NOTE: Be sure that all supply- and return-air grilles are open, Connect the black lead to the IFR. Insulate the purple lead to avoid free from obstructions, and adjusted properly. contact with any chassis parts. ON 3–Speed Motors: remo
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→ Table 3—Electrical Data—50ZH VOLTAGE UNIT 50ZH COMPRESSOR ELECTRIC HEAT SINGLE POINT POWER SUPPLY RANGE SIZE OFM IFM V-PH-HZ (–SERIES, IF FLA FLA FUSE OR MIN MAX RLA LRA Nominal KW* FLA MCA MOCP USED) CKT BKR -/- -/- 17.6/17.6 25/25 - 3.8/5.0 18.3/20.8 40.4/43.6 45/45 - 024–311 208/230–1–60 187 254 11.4 56.0 0.9 2.4 5.6/7.5 26.9/31.3 51.2/56.7 60/60 - 7.5/10.0 36.1/41.7 62.7/69.7 - 70/70 -/- -/- 18.4/18.4 25/25 — 3.8/5.0 18.3/20.8 41.3/44.4 45/45 — 024–321 208/230–1–60 187 254 12.1 54.0 0.9 2.
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EXAMPLE: Supply voltage is 460-3-60. AB = 452 v LEGEND BC = 464 v AC = 455 v FLA — Full Load Amps LRA — Locked Rotor Amps 452 + 464 + 455 ® Average Voltage = MCA — Minimum Circuit Amps 3 MOCP — Maximum Overcurrent Protection 1371 RLA — Rated Load Amps = CKT BKR — Circuit Breaker 3 = 457 NOTES: Determine maximum deviation from average voltage. 1. In compliance with NEC (National Electrical Code) requirements (AB) 457 452=5v for multimotor and combination load equipment (refer to NEC (BC) 464 457=
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758 110 758 110 683 100 683 100 OUTDOOR TEMP OUTDOOR TEMP O O F C O O F C 115 46 115 46 621 90 621 90 105 41 105 41 95 35 95 35 552 80 85 29 552 80 85 29 75 24 75 24 65 18 65 18 483 70 483 70 55 13 55 13 45 7 45 7 414 60 414 60 345 50 345 50 276 40 276 40 207 30 207 30 30 40 50 60 70 80 90 30 40 50 60 70 80 90 O O SUCTION LINE TEMPERATURE ( F) SUCTION LINE TEMPERATURE ( F) -1 4 10 1621 2732 -1 4 10 1621 2732 O O SUCTION LINE TEMPERATURE ( C) SUCTION LINE TEMPERATURE ( C) C00164 C00166 Fig. 18—Co
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NOTE TO EQUIPMENT OWNER: Consult your local dealer about the availability of a maintenance contract. Disconnect and tag electrical power to the unit before removing top. Failure to adhere to this warning could cause serious injury or death. The ability to properly perform maintenance on this equip- ment requires certain expertise, mechanical skills, tools and Only qualified service personnel should perform maintenance and equipment. If you do not possess these, do not attempt to service procedur
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Table 4—Dry Coil Air Delivery* Horizontal Discharge (Deduct 10 percent for 208 Volt Operation) 230 AND 460 VOLT External Static Pressure (in. wg) Unit Motor Speed Watts/CFM 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Watts 288 285 282 279 274 268 261 - - Low Cfm 875 820 802 734 668 582 478 - - Watts 390 383 378 369 360 350 340 - - 024 Med Cfm 1131 1090 1038 978 917 830 721 - - Watts 528 520 510 495 480 460 450 - - High Cfm 1391 1338 1285 1200 1115 1018 920 - - Watts 288 285 282 279 274 268 261 - - Low C
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Table 5—Wet Coil Pressure Drop 3.125 in. UNIT SIZE AIRFLOW PRESSURE DROP 50ZH (CFM) (IN. WG) 600 0.02 700 0.05 024 800 0.06 C00021 900 0.07 Fig. 21—Outdoor-Fan Adjustment (024–048 Size) 900 0.06 030 1000 0.06 1200 0.08 1000 0.07 1200 0.09 036 1400 0.11 1600 0.12 1000 0.04 1200 0.06 042 1400 0.08 0.708in. 1600 0.09 C02017 1400 0.07 Fig. 22—Outdoor-Fan Adjustment (060 Size) 048 1600 0.08 1800 0.09 operating cycle, or if a suspected malfunction has occurred, check 1700 0.07 each electrical componen
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OUTDOOR COIL INDOOR COIL B A LCS D Check Valves STRAINER A Open C B Closed C Open D Closed LEGEND LCS Loss of Charge Switch Acutrol Metering Device Check Valve (Arrow indicates direction of flow) HEATING CYCLE 1. Hot gas from compressor flows through the 4-way valve and is 3. Each circuit evaporates the refrigerant and the circuits are com- directed to the cooling liquid line check valve. It is then condensed bined in the outdoor header with some of the circuits flowing through and directed thro
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OUTDOOR COIL INDOOR COIL B A LCS D Check Valves STRAINER A Closed C B Open C Closed D Open LEGEND LCS Loss of Charge Switch Acutrol Metering Device Check Valve (Arrow indicates direction of flow) COOLING CYCLE 1. Hot gas from compressor flows through the 4-way valve and is 3. Each circuit evaporates the refrigerant and the circuits are com- directed to the heating liquid line check valve. It is then con- bined in the indoor coil header with some of the circuits flowing densed and subcooled throu
