Carrier 50GX - Manual
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Table of Contents:
- Page 2 – except
- Page 3 – UNIT; REQUIRED CLEARANCE FOR OPERATION AND SERVICING; REQUIRED CLEARANCE TO COMBUSTIBLE MATL.
- 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
- Page 6 – Fig. 4B—50GS and 50GX Unit Corner Weights; Fig. 5A—Unit Leveling Tolerances; Fig. 5B—Slab Mounting Detail
- 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
- Page 8 – Table 1—Physical Data—Unit 50GS
- 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
- Page 10 – copper; Fig. 9—Vertical Duct Cover Removed; LEGEND
- Page 11 – Table 4—Electrical Data—50GS
- Page 12 – Table 5—Electrical Data—50GX
- Page 13 – transformer; Never operate a motor where a phase imbalance in supply volt-
- Page 14 – Fig. 11—Fan Blade Clearance
- Page 18 – MAINTENANCE; Table 7—Color Coding for 460-V GE Motor Leads
- Page 19 – Horizontal and Downflow Discharge; Unit
- Page 25 – TROUBLESHOOTING; Use the
- Page 26 – Table 10—Troubleshooting—Cooling
50GS, 50GX
Single Packaged Electric Cooling Units
Installation, Start-Up, and Operating Instructions
50GS Sizes 018-060, 50GX Sizes 024-060
NOTE:
Read the entire instruction manual before starting the
installation.
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indicates a change since the last issue.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS .....................................................1
Introduction ....................................................................................2
RECEIVING AND INSTALLATION ..........................................2
Check Equipment......................................................................2
IDENTIFY UNIT ................................................................2
INSPECT SHIPMENT ........................................................2
Provide Unit Support ................................................................2
ROOF CURB.......................................................................2
SLAB MOUNT ...................................................................2
GROUND MOUNT ............................................................2
Provide Clearances....................................................................2
Field Fabricate Ductwork .........................................................2
Rig and Place Unit....................................................................2
INSPECTION ......................................................................3
INSTALLATION ................................................................3
Connect Condensate Drain .......................................................7
Install Duct Connections ..........................................................7
CONFIGURING UNITS FOR DOWNFLOW (VERTI-
CAL) DISCHARGE ............................................................8
Install Electrical Connection ....................................................9
HIGH-VOLTAGE CONNECTIONS ................................10
SPECIAL PROCEDURES FOR 208-V OPERATION ...10
CONTROL VOLTAGE CONNECTIONS .......................10
STANDARD CONNECTION ..........................................10
TRANSFORMER PROTECTION....................................13
PRE-START-UP ..........................................................................13
START-UP ...................................................................................14
CHECK FOR REFRIGERANT LEAKS ..........................14
START UP COOLING SECTION AND MAKE ADJUST-
MENTS ..............................................................................14
CHECKING COOLING CONTROL OPERATION .......14
CHECKING
AND
ADJUSTING
REFRIGERANT
CHARGE ...........................................................................14
INDOOR
AIRFLOW
AND
AIRFLOW
ADJUST-
MENTS ..............................................................................18
For 208/230V.....................................................................18
FOR 460-V GE MOTORS................................................18
COOLING SEQUENCE OF OPERATION .....................18
MAINTENANCE .........................................................................18
AIR FILTER......................................................................22
EVAPORATOR BLOWER AND MOTOR.....................22
CONDENSER COIL, EVAPORATOR COIL, AND CON-
DENSATE DRAIN PAN ..................................................24
CONDENSER FAN ..........................................................24
ELECTRICAL CONTROLS AND WIRING ..................24
REFRIGERANT CIRCUIT...............................................24
EVAPORATOR AIRFLOW .............................................25
METERING DEVICE — ACUTROL DEVICE .............25
LIQUID LINE STRAINER ..............................................25
Troubleshooting............................................................................25
Start-Up Checklist ........................................................................25
NOTE TO INSTALLER — Before the installation, READ THESE
INSTRUCTIONS CAREFULLY AND COMPLETELY. Also,
make sure the User’s Manual and Replacement Guide are left with
the unit after installation.
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components. Only
trained and qualified personnel should install, repair, or service
air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters. All other operations should be performed
by trained service personnel. When working on air-conditioning
equipment, observe precautions in the literature, tags, and labels
attached to the unit, and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for unbrazing operations. Have fire extinguisher
available for all brazing operations. Consult a qualified installer or
service agency for information or assistance. The qualified in-
staller or agency must use only factory-authorized kits or acces-
sories when modifying this product.
Fig. 1—Unit 50GS and 50GX
C99001
Visit www.carrier.com
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 6
Tab 6 8
PC 101
Catalog No. 535–00130
Printed in U.S.A.
Form 50GS,GX-4SI
Pg 1
9–03
Replaces: 50GS,GX-3SI
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Summary
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, ...
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, ...
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...
