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50ZHA024-060
Packaged Heat Pump Units
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Installation, Start-Up and Service Instructions
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS.....................................................1
INTRODUCTION..........................................................................2
RECEIVING AND INSTALLATION..........................................2
Check Equipment..................................................
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Follow all safety codes. Wear safety glasses and work gloves. Use A6-in.widegravelapronshouldbeusedaroundtheflatsurfaceto quenching cloth for unbrazing operations. Have fire extinguisher preventairflowblockagebygrassorshrubs.Donotsecuretheunit available for all brazing operations. to the flat surface except where required by local codes. The unit should be level to within 1/4 inch. This is necessary for the unit drain to function properly. FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD GROUND MOUNT Fa
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3 A05201 Fig. 2—Unit Base Dimensions, 50ZHA024-060
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Table 1—Unit Specifications UNIT HEIGHT UNIT WEIGHT CENTER OF GRAVITY IN. (MM) IN. (MM) UNIT ELECTRICAL CHARACTERISTICS lb kg ″A″ XY Z 50ZHA024 208/230-1-60 293 133 30.13 (765) 14.0 (356) 19.0 (483) 12.0 (305) 50ZHA030 208/230-1-60 324 147 34.13 (867) 14.0 (356) 19.0 (483) 12.0 (305) 50ZHA036 208/230-1-60 377 171 42.13 (1070) 14.0 (356) 19.0 (438) 19.8 (503) 50ZHA042 208/230-1-60 389 177 42.13 (1070) 14.0 (356) 19.0 (483) 21.9 (556) 50ZHA048 208/230-1-60 384 175 42.13 (1070) 14.0 (356) 19.0 (483
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Table 2—Physical Data UNIT 50ZHA 024 030 036 042 048 060 OPERATING WEIGHT (lbs) 293 324 377 389 384 433 COMPRESSOR TYPE Scroll Ultra Tech Scroll R-22 REFRIGERANT Charge (lb) 7.5 10.3 10.3 11.9 11.4 13.3 Accurater TXV REFRIGERANT METERING DEVICE Orifice ID (in.) .067 .067 .082 .086 — — Orifice OD (in.) .049 .057 .059 .063 .070 .073 Copper Tubes, Aluminum Plate Fins CONDENSER COIL Rows...Fins/in. 2...21 2...21 2...21 2...21 2...21 2...21 Face Area (sq. ft.) 11.1 12.7 15.8 15.8 13.3 15.8 Propeller
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CONNECTING GROUND LEAD TO UNIT GROUND INDOOR THERMOSTAT RefertoFig.8and9.Connectthegroundleadtothechassisusing the unit ground in the control box. ROUTING CONTROL POWER WIRES RETURN AIR Form a drip-loop with the thermostat leads before routing them into the unit. Route the thermostat leads through grommeted hole FROM TOP COVER provided in unit into unit control box (See Fig. 7). Connect POWER SOURCE thermostat leads and unit power leads as shown in Fig. 9, 10A & 10B. Route thermostat wires throu
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Table 4—Required Subcooling REQUIRED SUBCOOLING °F (°C) Outdoor Ambient Temperature Model Size 75 (24) 82 (28) 85 (29) 95 (35) 105 (41) 048 17.5 (9.7) 17 (9.4) 16.5 (9.2) 16 8.9) 14 (7.8) 060 21 (11.7) 20.5 (11.4) 20 (11.1) 19 (10.6) 16 (8.9) Table 5—Required Liquid Line Temperature REQUIRED LIQUID LINE TEMPERATURE FOR A SPECIFIC SUBCOOLING (R-22) Required Subcooling (°F) Required Subcooling (°C) Pressure (psig) Pressure (kPa) 5 10 15 20 368 11 134 71 66 61 56 924 24 22 19 16 141 74 69 64 59 972
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Step2—Start-UpCoolingSectionandMakeAdjustments UNIT DAMAGE HAZARD Failure to follow this caution may result in unit component damage. Complete the required procedures given in the Pre-Start- Up section this page before starting the unit. Do not jumper any safety devices when operating the unit. Do not operate the compressor in cooling mode when the outdoor temperature is below 40 F. Do not rapid-cycle the compressor. Allow 5 minutes between ‘‘on’’ cycles to prevent compressor damage. CHECKIN
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3. Insulate the temperature sensing device so that the outdoor ambient doesn’t affect the reading. BROWN 4. Locate the measured suction line pressure in the top row of C Table 8 and the measured outdoor ambient temperature in the left column of the table. Based on the two values, determine RED the required suction line temperature. R 5. If the measured suction line temperature is greater than the tabulated temperature, add charge in the system. GREEN 048 and 060 units: G 1. Measure discharge lin
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A05199 Fig. 11A—Typical Unit Electrical Diagram (Sizes 024-042) 10
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A05200 Fig. 11B—Typical Unit Electrical Diagram (Sizes 048-060) 11
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A05209 Fig. 11C—Accessory Electric Heater Wiring Table 6—Electrical Data—50ZHA VOLTAGE COMPRESSOR ELECTRIC HEAT SINGLE POINT POWER SUPPLY RANGE UNIT SIZE OFM IFM V-PH-HZ 50ZHA FLA FLA FUSE OR MIN MAX RLA LRA Nominal KW* FLA MCA MOCP CKT BKR —/— —/— 18.6/18.6 25/25 — 3.8/5.0 18.1/20.8 41.2/44.7 45/50 — 024 208/230–1–60 187 253 10.9 54.0 0.9 4.1 7.5/10.0 36.1/41.7 63.8/70.7 — 60/70 5.4/7.2 26.0/30.0 51.1/56.1 50/50 — —/— —/— 21.8/21.8 30/30 — 3.8/5.0 18.1/20.8 44.4/47.9 50/50 — 030 208/230–1–60 18
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Table 7—Dry Coil Air Delivery* Horizontal Discharge (Deduct 10 percent for 208 Volt Operation) EXTERNAL STATIC PRESSURE 50ZHA SPEED TAP WATTS/C.F.M 0.1 0.2 .03 0.4 0.5 0.6 0.7 0.8 0.9 1.0 Watts - 99 100 118 130 142 ---- 1 C.F.M. - 848 793 757 698 632 ---- 024 Watts ----- 222 233 244 257 260 2 C.F.M ----- 970 918 861 795 729 Watts - 155 146 157 170 ----- 2 C.F.M - 1108 995 951 884 ----- 030 Watts ----- 261 275 286 291 315 3 C.F.M. ----- 1117 1053 1014 980 877 Watts 180 166 179 191 204 216 ---- 1
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Table 8—Cooling Charging Chart SUCTION LINE TEMPERATURE (°F) Suction Line Pressure (PSIG) OD Temp. (°F) 52 54 56 59 61 64 67 70 73 76 79 82 85 89 92 45 51 55 60 64 69 —————————— 55 — — 53 57 62 66 70 ———————— 65 — ——— 53 57 62 66 71 75 ————— 75 — —————— 56 61 66 71 76 ——— 85 — ——————— 53 58 63 67 72 —— 95 — ———————— 50 54 58 62 66 — 105 — ————————— 50 53 57 60 64 115 — ————————— 49 52 55 58 61 125 — —————————— 50 53 56 59 SUCTION LINE TEMPERATURE (°C) Suction Line Pressure (kPa) OD Temp. (°C) 36
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be performed on this equipment. This cooling unit should be inspected at least once each year by a qualified service person. To ELECTRICAL SHOCK HAZARD troubleshoot cooling of units, refer to Troubleshooting chart in Failure to follow this warning could result in personal injury back of book. or death. NOTE TO EQUIPMENT OWNER: Consult your local dealer Disconnect and tag electrical power to the unit before about the availability of a maintenance contract. removing top. Only qualified service per
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Table 9—Wet Coil Pressure Drop STANDARD CFM (S.C.F.M.) UNIT SIZE 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 024 .027 .034 040.047.053 ---------- 030 - .036 .042 .050 .055 .063 .072 .081 - - - - - - - 036 - - - .050 .055 .063 .072 .081 .090 .097 - - - - - 042 - - - - .042 .049 .052 .059 .065 .071 .078 .085 .091 - - 048 - - - - - - .072 .081 .090 .097 .108 .120 .129 .139 - 060 - - - - - - - - - .071 .078 .085 .091 .098 .114 a. Slip the wheel back in the housing with the
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and that the air filter is clean. When necessary, refer to Indoor Airflow and Airflow Adjustments section to check the system airflow. Step 9—Metering Devices Refrigerant cooling metering device is an Accurator (024-042) or TXV (048 and 060) located upstream of the indoor coil distributor assembly. Refrigerant heating mode metering device is an Accu- rater located upstrem of the outdoor coil distributor assembly. 0.708in. Step 10—Lubrication C02017 COMPRESSOR—The compressor is charged with the c
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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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Table 12—Troubleshooting—Cooling and Heating SYMPTOM CAUSE REMEDY Power Failure Call power company Loss of Charge Evaluate unit for possible refrigerant leak Switch open Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective thermostat, contractor, transformer, or Compressor and outdoor fan will not start. Replace component control relay Insufficient line voltage Determine cause and correct Incorrect or faulty wiring Check wiring diagram and rewire correctly Lower
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START-UP CHECKLIST (REMOVE AND STORE IN JOB FILE) I. PRELIMINARY INFORMATION Model No ............................................................................................................................................................. Serial No .............................................................................................................................................................. Date ..................................................................................
