Page 2 - except
Before performing service or maintenance operations onsystem, turn off power to unit. Turn off accessory heaterpower switch, if applicable. Electrical shock can causepersonal injury. Recognize safety information. This is the safety-alert symbol . When you see this symbol in instructions or manuals, ...
Page 3 - UNIT; REQUIRED CLEARANCE FOR OPERATION AND SERVICING; REQUIRED CLEARANCE TO COMBUSTIBLE MATL.
Accessory lifting kit is only to be used with Small Packagedunits which have a composite base pan with molded riggingholds. INSPECTIONPrior to initial use, and at monthly intervals, all rigging bracketsand straps should be visually inspected for any damage, evidence of wear, structural deformation, ...
Page 5 - Fig. 4A— Roof Curb Dimensions; UNIT SIZE; Roof Curb for Small Cabinet; Roof Curb for Large Cabinet; Note A: When unit mounting scre w is used
Fig. 4A— Roof Curb Dimensions UNIT SIZE ODS CATALOG NUMBER A IN. (MM) B IN. (MM) C IN. (MM) D IN. (MM) 50GS018-042 50GX024-036 CPRFCURB006A00 8 (203) 11(279) 16-1/2 (419) 28-3/4 (730) CPRFCURB007A00 14 (356) 11(279) 16-1/2 (419) 28-3/4 (730) 50GS048-060 50GX042-060 CPRFCURB008A00 8 (203) 16-3/16 (41...
Page 6 - Fig. 4B—50GS and 50GX Unit Corner Weights; Fig. 5A—Unit Leveling Tolerances; Fig. 5B—Slab Mounting Detail
Fig. 4B—50GS and 50GX Unit Corner Weights CORNER # 50GS 50GX 018 024 030 036 042 048 060 024 030 036 042 048 060 1 58 60 59 62 76 69 84 76 84 85 71 78 85 2 47 50 48 50 50 45 54 49 60 60 55 56 66 3 55 56 56 58 71 88 106 57 61 64 85 80 108 4 94 94 95 98 97 122 145 88 86 90 110 112 140 TOTAL WEIGHT 254...
Page 7 - When installing condensate drain connection be sure to; Step 7—Install Duct Connections; Use flexible connectors between ductwork and; Fig. 6—Suggested Rigging; SIZE
Lifting point should be directly over the center of gravity forthe unit. Step 6—Connect Condensate DrainNOTE: When installing condensate drain connection be sure to comply with local codes and restrictions.Models 50GS and 50GX dispose of condensate water through a3/4 in. NPT fitting which exits thro...
Page 8 - Table 1—Physical Data—Unit 50GS
CONFIGURING UNITS FOR DOWNFLOW (VERTICAL) DIS-CHARGE Before performing service or maintenance operations on thesystem, turn off main power to unit and install lockout tag orelectrical shock could result. 1. Open all electrical disconnects and install lockout tag before starting any service work. 2. ...
Page 9 - Step 8—Install Electrical Connection; Fig. 7—Condensate Trap; TRAP; Table 3—Minimum Airflow for Safe Electric Heater; Fig. 8—Supply and Return Duct Opening
5. It is recommended that the unit base insulation around the perimeter of the vertical return-air opening be secured to theunit base with aluminum tape. Applicable local codes mayrequire aluminum tape to prevent exposed fiberglass. 6. Cover both horizontal duct openings with the duct covers from th...
Page 10 - copper; Fig. 9—Vertical Duct Cover Removed; LEGEND
Failure to follow these precautions could result in damage tothe unit being installed:1. Make all electrical connections in accordance with NEC ANSI/NFPA (latest edition) and local electrical codesgoverning such wiring. In Canada, all electrical connec-tions must be in accordance with CSA standard C...
Page 11 - Table 4—Electrical Data—50GS
Table 4—Electrical Data—50GS UNIT 50GS SIZE V-PH-HZ VOLTAGE RANGE COMPRESSOR OFM IFM ELECTRIC HEAT POWER SUPPLY Min Max RLA LRA FLA FLA Nominal Kw* FLA MCA Max Fuse orCkt Bkr MOCP 018 208/230–1–60 187 254 9 45 0.8 1.8 -/- 3.8/5.0 5.4/7.2 7.5/10.0 -/- 18.1/20.8 26.0/30.0 36.1/41.7 13.9/13.9 24.8/28.3...
Page 12 - Table 5—Electrical Data—50GX
Table 5—Electrical Data—50GX UNIT 50GX SIZE V-PH-HZ VOLTAGE RANGE COMPRESSOR OFM IFM ELECTRIC HEAT POWER SUPPLY Min Max RLA LRA FLA FLA Nominal Kw * FLA MCA Max Fuse or Ckt Bkr MOCP 024 208/230–1–60 187 253 10.9 54.0 0.9 2.0 -/- 3.8/5.0 5.4/7.2 7.5/10.0 -/- 18.1/20.8 26.0/30.0 36.1/41.7 16.5/16.5 25...
Page 13 - transformer; Never operate a motor where a phase imbalance in supply volt-
Run the low-voltage leads from the thermostat, through the inlethole, and into unit low-voltage splice box.Locate five 18-gage wires leaving control box. These low-voltageconnection leads can be identified by the colors red, green, yellow,brown, and white (See Fig. 10). Ensure the leads are long eno...
Page 14 - Fig. 11—Fan Blade Clearance
leak. Leak test all refrigerant tubing connections usingelectronic leak detector, halide torch, or liquid-soap solu-tion. If a refrigerant leak is detected, see Check forRefrigerant Leaks section. c. Inspect all field- and factory-wiring connections. Be sure that connections are completed and tight....
Page 18 - MAINTENANCE; Table 7—Color Coding for 460-V GE Motor Leads
When evaluating the refrigerant charge, an indicated adjust-ment to the specified factory charge must always be veryminimal. If a substantial adjustment is indicated, an abnormalcondition exists somewhere in the cooling system, such asinsufficient airflow across either coil or both coils. Proceed as...
Page 19 - Horizontal and Downflow Discharge; Unit
inspected at least once each year by a qualified service person. Totroubleshoot heating or cooling of units, refer to tables at the backof the book.The following are 50GS Cooling Charging Charts:The following are 50GX Cooling Charging Charts:NOTE TO EQUIPMENT OWNER: Consult your local dealerabout th...
Page 25 - TROUBLESHOOTING; Use the
System under pressure. Relieve pressure and recover allrefrigerant before system repair or final unit disposal to avoidpersonal injury or death. Use all service ports and open allflow-control devices, including solenoid valves. If oil is detected or if low cooling performance is suspected,leak-test ...
Page 26 - Table 10—Troubleshooting—Cooling
Table 10—Troubleshooting—Cooling SYMPTOM CAUSE REMEDY Compressor and condenser fan will not start. Power Failure Call power company Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker Defective thermostat, contractor, transformer, or control relay Replace component Insufficie...