Carrier 50SX024-060 manual

Installation, Start-Up and Service Instructions CONTENTS Page SAFETY CONSIDERA TIONS ................. 1-12 General ......................................1 RECEIVING AND INST ALLA TION ........... 13-26 Step 1 — Check Equipment ..................1 3 • IDENTIFY UNIT • INSPECT SHIPMENT Step 2 — Provide Unit Support ..............1 3 • ROOF [...]

REQUIRED CLEARANCES TO COMBUSTIBLE MA TERIAL — in. (mm) Unit T op ................................ 1 4 (356) Duct Side of Unit ............................ 2 (51) Side Opposite Ducts ........................ 1 4 (356) Bottom of Unit ................................. 0 V ertical Discharge First 12 in. (305) of Supply Duct ....... 1 (25) NECESSARY [...]

REQUIRED CLEARANCES TO COMBUSTIBLE MA TERIAL — in. (mm) Unit T op ................................ 1 4 (356) Duct Side of Unit ............................ 2 (51) Side Opposite Ducts ........................ 1 4 (356) Bottom of Unit ................................. 0 V ertical Discharge First 12 in. (305) of Supply Duct ....... 1 (25) NECESSARY [...]

REQUIRED CLEARANCES TO COMBUSTIBLE MA TERIAL — in. (mm) Unit T op .................................... 1 4 (356) Duct Side of Unit ................................. 2 (51) Side Opposite Ducts ............................. 1 4 (356) Bottom of Unit ..................................... 0 V ertical Discharge First 12 in. (305) of Supply Duct .......[...]

REQUIRED CLEARANCES TO COMBUSTIBLE MA TERIAL — in. (mm) Unit T op .................................. 1 4 (356) Duct Side of Unit .............................. 2 (51) Side Opposite Ducts ........................... 1 4 (356) Bottom of Unit .................................. 0 V ertical Discharge First 12 in. (305) of Supply Duct ............ 1 (2[...]

REQUIRED CLEARANCES TO COMBUSTIBLE MA TERIAL — in. (mm) Unit T op ................................ 1 4 (356) Duct Side of Unit ............................ 2 (51) Side Opposite Ducts ........................ 1 4 (356) Bottom of Unit ................................. 0 V ertical Discharge First 12 in. (305) of Supply Duct ....... 1 (25) NECESSARY [...]

REQUIRED CLEARANCES TO COMBUSTIBLE MA TERIAL — in. (mm) Unit T op ................................ 1 4 (356) Duct Side of Unit ............................ 2 (51) Side Opposite Ducts ........................ 1 4 (356) Bottom of Unit ................................. 0 V ertical Discharge First 12 in. (305) of Supply Duct ....... 1 (25) NECESSARY [...]

Fig. 8 — Dimensions; Units 50SX042-060 Without Base Rail 8[...]

REQUIRED CLEARANCES T O COMBUSTIBLE MA TERIAL — in. (mm) Unit T op ........................................ 1 4 (356) Duct Side of Unit ................................... 2 (51) Side Opposite Ducts ............................... 1 4 (356) Bottom of Unit ......................................... 0 V ertical Discharge First 12 in. (305) of Supply[...]

Fig. 9 — Dimensions; Units 50SX042-060 With Optional Base Rail 10[...]

REQUIRED CLEARANCES T O COMBUSTIBLE MA TERIAL — in. (mm) Unit T op ........................................ 1 4 (356) Duct Side of Unit ................................... 2 (51) Side Opposite Ducts ............................... 1 4 (356) Bottom of Unit ......................................... 0 V ertical Discharge First 12 in. (305) of Supply[...]

P ART NUMBER ‘ ‘A ’’ FLA T CURB CPRFCURB001A00 8 9 [203] CPRFCURB002A00 1 1 9 [279] CPRFCURB003A00 14 9 [356] NOTES: 1. Roof curb must be set up for unit being installed. 2. Seal strip must be applied as required for unit being installed. 3. Dimensions in [ ] are in millimeters. 4. Roof curb is made of 16 gage steel. 5. Attach ductwork to c[...]

RECEIVING AND INST ALLA TION Step 1 — Check Equipment IDENTIFY UNIT — The unit model number and serial num- ber are stamped on the unit identification plate. Check this information against shipping papers. INSPECT SHIPMENT — Inspect for shipping damage while unit is still on shipping pallet. If unit appears to be damaged or is torn loose fro[...]

NOTICE TO RIGGERS Hook rigging shackles through holes in lifting brackets, as shown in Detail ‘‘A,’’ lifting brackets to be centered around the unit center of gravity . Use wood top skid when rigging, to prevent rigging straps from damaging unit. All panels must be in place when rigging. UNIT SIZE 50SS SHIPPING WEIGHT A B C Lb Kg in. mm in.[...]

T able 1 — Physical Data — Unit 50SS UNIT 50SS 018 024 030 036 042 048 060 REFRIGERANT R-22 Metering Device Acutrol™ System Charge (lb) 2.60 2.75 3.40 4.30 5.20 6.50 7.00 OPERA TING WEIGHT (lb) Without Base Rails 208 237 254 270 300 332 359 With Optional Base Rails 228 257 274 290 320 352 379 COMPRESSOR TYPE Rotary Reciprocating Reciprocating[...]

Step 5 — Select and Install Ductwork — The de- sign and installation of the duct system must be in accor- dance with the standards of the NFP A (National Fire Protec- tion Association) for installation of nonresidence-type air conditioning and ventilating systems, NFP A 90A or residence- type, NFP A90B; and/or local codes and residence-type, NF[...]

5. Remove indoor blower access panel (Fig. 18). 6. Disconnect evaporator -fan motor leads from evaporator- fan relay and unit contactor . Carefully disengage wire tie containing evaporator-fan motor leads from the unit control box (Fig. 19). 7. Remove screws (Fig. 20) securing evaporator blower hous- ing to blower shelf and carefully slide out blow[...]

CONVER TING HORIZONT AL DISCHARGE UNITS TO DOWNFLOW (VER TICAL) DISCHARGE — ICM (Inte- grated Control Motor) UNITS — Units are shipped in a hori- zontal configuration. T o convert a horizontal unit for down- flow (vertical) discharge, perform the following steps: Before performing service or maintenance operations on system, turn of f main po[...]

7. Remove screws securing blower shelf to duct panel. Dis- card the blower shelf. 8. Locate lances in basepan insulation that are placed over the perimeter of the vertical discharge opening cover (Fig. 21). 9. Using a straight edge and sharp knife, cut the insulation around the perimeter of the cover . Remove the screws securing the cover to the ba[...]

ACCESSOR Y DUCT FLANGE KIT INST ALLA TION — Refer to Fig. 26 for duct adapter dimensions and hole locations. 1. Mark hole locations shown in Fig. 26. 2. At marked locations, drill holes using a no. 26 (.147-in.) twist drill. 3. Partially secure duct flanges using two of the no. 10, 1 ⁄ 2 -in. screws provided. 4. See the following caution. Usin[...]

Step 7 — Install Electrical Connections The unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of an electrical wire connected to the unit wire-binding screw in the control compartment, or con- duit approved for electrical [...]

T able 4A — Electrical Data — 50SS Units UNIT SIZE 50SS V -PH-Hz VOL T AGE RANGE COMPRESSOR OUTDOOR- FA N MOTOR INDOOR- FA N MOTOR POWER SUPPL Y A WG 60C MIN WIRE SIZE MAX WIRE LENGTH (ft) Min Max RLA LRA FLA FLA MCA MOCP* 018 208/230-1-60 187 253 8.3 45.0 0.7 1.8 12.0 15 14 75 024 208/230-1-60 187 253 12.4 61.0 0.7 2.0 18.2 30 12 80 030 208/23[...]

T able 4B — Electrical Data — 50SX Units UNIT SIZE 50SX V -PH-Hz VOL T AGE RANGE COMPRESSOR OUTDOOR- FA N MOTOR INDOOR- FA N MOTOR POWER SUPPL Y A WG 60C MIN WIRE SIZE MAX WIRE LENGTH (ft) Min Max RLA LRA FLA FLA MCA MOCP* 024 208/230-1-60 187 253 12.9 62.5 1.4 2.0 19.5 30 12 75 030 208/230-1-60 187 253 15.0 76.0 1.4 2.6 22.8 30 10 100 036 208/[...]

ROUTING CONTROL POWER WIRES — ICM UNITS (24 v) — Remove knockout in the duct panel (see Fig. 28). Remove the rubber grommet from the installer ’ s packet (in- cluded with unit) and install it in the knockout opening. Route thermostat wires through grommet providing a drip loop at the panel. Connect low-voltage leads to the thermostat as shown[...]

LEGEND IFO — Indoor Fan On JW — Jumper Wire C— Contactor , Compressor COM — Common CTD — Compressor Time Delay FU — Fuse HR — Heater Relay ICM — Integrated Control Motor IFO — Indoor Fan On PL — Plug TRAN — T ransformer Field Splice T erminal (Marked) Fig. 33 — Units 50SX048,060 — 208/230-1-60, Integrated Control Motor Wir[...]

PRE-ST ART -UP Failure to observe the following warnings could result in serious personal injury: 1. Follow recognized safety practices and wear protec- tive goggles when checking or servicing refrigerant system. 2. Do not operate compressor or provide any electric power to unit unless compressor terminal cover is in place and secured. 3. Do not re[...]

4. If the unit is equipped with a crankcase heater , start the heater 24 hours before starting the unit. T o start the heater only , turn the thermostat to the OFF position and ener- gize the electrical disconnect to the unit. ST ART -UP Use the Start-Up Checklist supplied at the end of this book, and proceed as follows: Check for Refrigerant Leaks[...]

c. Suction-tube temperature (F) at low-side service fitting. d. Suction (low-side) pressure (psig). 5. Using ‘ ‘Superheat Charging T able,’ ’ compare outdoor-air temperature (F db) with evaporator inlet-air temperature (F wb) to determine desired system operating superheat temperature. See T ables 5A-5I and 6A-6F . 6. Using ‘ ‘Required[...]

T able 5C — Superheat Charging T able, 50SS030 TEMP (F) AIR ENT COND EV AP AIR — CFM 1000 Evap Air — Ewb (F) 54 56 58 60 62 64 66 68 70 72 74 76 65 SPH 14.2 15.1 16.1 17.1 19.2 21.3 23.3 24.7 25.9 27.2 27.8 28.5 70 SPH 13.6 14.1 14.6 15.0 17.1 19.2 21.3 22.8 24.2 25.7 26.3 26.9 75 SPH 13.0 13.0 13.0 13.0 15.1 17.2 19.2 20.9 22.6 24.2 24.8 25.[...]

T able 5F — Superheat Charging T able, 50SS048 (Carrier Scroll Compressor) TEMP (F) AIR ENT COND EV AP AIR — CFM 1600 Evap Air — Ewb (F) 54 56 58 60 62 64 66 68 70 72 74 76 65 SPH 15.5 15.5 15.6 15.6 17.6 19.6 21.6 22.8 24.0 25.2 25.2 25.3 70 SPH 1 1.7 1 1.8 1 1.8 1 1.8 13.9 16.0 18.0 20.1 22.2 24.3 24.3 24.3 75 SPH 8.0 8.0 8.0 8.0 10.2 12.3 [...]

T able 5I — Superheat Charging T able, 50SS060 (Copeland Scroll Compressor) TEMP (F) AIR ENT COND EV AP AIR — CFM 1995 Evap Air — Ewb (F) 54 56 58 60 62 64 66 68 70 72 74 76 65 SPH 20.1 20.1 20.1 20.1 20.1 20.1 22.6 25.2 25.6 26.1 26.6 27.0 70 SPH 16.5 16.5 16.5 16.5 17.3 18.0 20.6 23.1 24.0 24.8 25.6 26.5 75 SPH 13.0 13.0 13.0 13.0 14.5 16.0[...]

T able 6C — Superheat Charging T able, 50SX036 TEMP (F) AIR ENT COND EV AP AIR — CFM 1200 Evap Air — Ewb (F) 54 56 58 60 62 64 66 68 70 72 74 76 65 SPH 21.3 21.3 21.3 21.3 22.0 22.6 23.3 23.5 23.7 23.8 23.3 22.8 70 SPH 19.3 19.3 19.3 19.3 20.2 21.2 22.2 22.3 22.5 22.6 22.0 21.5 75 SPH 17.2 17.2 17.2 17.2 18.5 19.7 21.0 21.1 21.3 21.4 20.7 20.[...]

T able 6F — Superheat Charging T able, 50SX060 TEMP (F) AIR ENT COND EV AP AIR — CFM 1995 Evap Air — Ewb (F) 54 56 58 60 62 64 66 68 70 72 74 76 65 SPH 20.1 20.1 20.1 20.1 20.1 20.1 22.6 25.2 25.6 26.1 26.6 27.0 70 SPH 16.5 16.5 16.5 16.5 17.3 18.0 20.6 23.1 24.0 24.8 25.6 26.5 75 SPH 13.0 13.0 13.0 13.0 14.5 16.0 18.5 21.1 22.3 23.5 24.7 25.[...]

INDOOR AIRFLOW AND AIRFLOW ADJUSTMENTS For cooling operation, the recommended airflow is 350 to 450 cfm per each 12,000 Btuh of rated cooling capacity. T ables 8-1 1 show airflows at several external static pres- sures. T able 12 shows airflow for Fan Only and Cooling modes for ICM units. T ables 13-15 show accompanying pressure drops for wet co[...]

SEQUENCE OF OPERA TION — STD NON-ICM UNITS Cooling NOTE: W ith the F AN switch in the ON position, 24 v is supplied to the IFR through the G terminal on the thermo- stat. This voltage ener gizes the coil of the contactor , closing the normally-open set of contacts which provide continuous power to the indoor (evaporator) fan motor (IFM). Moving t[...]

T able 8 — Dry Coil Air Delivery* — Horizontal Discharge (Deduct 10% for 208 v) — Unit 50SS UNIT SIZE MOTOR SPEED 230 AND 460 V HORIZONT AL DISCHARGE External Static Pressure (in. wg) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 018 Low W atts 230 225 220 210 195 170 ————— C f m 7 6 0 7 4 5 7 2 5 6 9 5 6 4 0 5 4 0 ————— Hig[...]

T able 9 — Dry Coil Air Delivery* — V ertical Discharge (Deduct 10% for 208 v) — Unit 50SS UNIT SIZE MOTOR SPEED 230 AND 460 V VERTICAL DISCHARGE External Static Pressure (in. wg) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 018 Low W atts 230 225 220 210 195 170 ————— C f m 7 6 0 7 4 5 7 2 5 6 9 5 6 4 0 5 4 0 ————— High W [...]

T able 1 1 — Dry-Coil Air Delivery* — V ertical Discharge (Deduct 10% for 208 V) — Unit 50SX UNIT SIZE 50SX MOTOR SPEED AIR DELIVER Y 230 AND 460 VOL T VERTICAL DISCHARGE External Static Pressure (in. wg) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 024, 030 Low W atts 280 275 265 255 250 245 240 ———— C f m 8 2 0 8 1 0 7 5 5 7 0 0 6 6 [...]

T able 13 — Wet Coil Pressure Drop UNIT SIZE AIRFLOW (cfm) PRESSURE DROP (in. wg) 018* 600 0.069 700 0.082 800 0.102 900 0.1 16 024 600 0.039 700 0.058 800 0.075 900 0.088 030 900 0.088 1000 0.095 1200 0.123 036 1000 0.068 1200 0.088 1400 0.108 1600 0.123 042 1000 0.048 1200 0.069 1400 0.088 1600 0.102 048 1400 0.068 1600 0.075 1800 0.088 060 170[...]

MAINTENANCE T o ensure continuing high performance, and to minimize the possibility of premature equipment failure, periodic main- tenance must be performed on this equipment. This cooling unit should be inspected at least once each year by a quali- fied service person. T o troubleshoot cooling of units, refer to T roubleshooting chart in back of [...]

c. Lift wheel from housing. When handling and/or clean- ing blower wheel, be sure not to disturb balance weights (clips) on blower wheel vanes. d. Remove caked-on dirt from wheel and housing with a brush. Remove lint and/or dirt accumulations from wheel and housing with vacuum cleaner , using soft brush at- tachment. Remove grease and oil with mild[...]

TROUBLESHOOTING COOLING CHART SYMPTOM CAUSE REMEDY Compressor and con- denser fan will not start. Power failure Call power company . Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker . Defective thermostat, contactor , transformer , or control relay Replace component. Insuff icient line voltage Determine cause and correct.[...]

TROUBLESHOOTING COOLING CHART (cont) SYMPTOM CAUSE REMEDY Integrated control motor (units 50SX048 208/230 v and 50SX060) IFM does not run. Blower wheel not secured to shaft. Properly tighten blower wheel to shaft. Insuff icient voltage at motor Determine cause and correct. Power connectors not properly seated Connectors should snap easily; do not f[...]

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P ACKAGED SER VICE TRAINING Our packaged service training programs provide an excellent way to increase your knowledge of the equipment discussed in this manual. Product programs cover: • Unit Familiarization • Installation Overview • Maintenance • Operating Sequence A large selection of product, theory , and skills programs is available. A[...]

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ST ART -UP CHECKLIST (Remove and Store in Job File) I. PRELIMINAR Y INFORMA TION MODEL NO.: DA TE: SERIAL NO.: TECHNICIAN: II. PRE-ST ART -UP (insert checkmark in box as each item is completed) M VERIFY THA T ALL P ACKING MA TERIALS HA VE BEEN REMOVED FROM UNIT M REMOVE ALL SHIPPING HOLDDOWN BOL TS AND BRACKETS PER INST ALLA TION INSTRUCTIONS M VER[...]