50GS, 50GX
3-Phase Single-Packaged Air Conditioners
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Installation, Start-Up, and Operating instructions
50GS,GX Sizes 030=060
HEATING & COOLING
NOTE: Read the entire instruction manual belk_re starting the
installation.
This symbol --> indicates a change since the last issue.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS ..................................................... l
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 ...................................................................... 7
INSTALLATION ................................................................ 7
Connect Condensate Drain ....................................................... 7
Install Duct Connections .......................................................... 8
CONFIGURING UNITS FOR DOWNFLOW (VERTI-
CAL) DISCHARGE ............................................................ 8
Install Electrical Connection .................................................... 9
HIGH-VOLTAGE CONNECTIONS ................................ lI)
SPECIAL PROCEDURES FOR 208-V OPERATION ...lI)
CONTROL VOLTAGE CONNECTIONS ....................... lI)
STANDARD CONNECTION .......................................... 11
TRANSFORMER PROTECTION .................................... 11
PRE-START-UP .......................................................................... 13
START-UP ................................................................................... 13
CHECK FOR REFRIGERANT LEAKS .......................... 13
START LIPCOOLING SECTION AND MAKE ADJUST-
MENTS .............................................................................. 13
CHECKING COOLING CONTROL OPERATION ....... 13
CHECKING AND ADJUSTING REFRIGERANT
CHARGE ........................................................................... 14
INDOOR AIRFLOW AND AIRFLOW ADJUST-
MENTS .............................................................................. 14
For 2081230V ..................................................................... 14
FOR 460-V GE MOTORS ................................................ 14
COOLING SEQUENCE OF OPERATION ..................... 14
MAINTENANCE ......................................................................... 17
AIR FILTER ...................................................................... 20
EVAPORATOR BLOWER AND MOTOR ..................... 21
CONDENSER COIL EVAPORATOR COIL, AND CON-
DENSATE DRAIN PAN .................................................. 21
CONDENSER FAN .......................................................... 22
ELECTRICAL CONTROLS AND WIRING .................. 22
REFRIGERANT CIRCUIT ............................................... 22
EVAPORATOR AIRFLOW ............................................. 22
C99001
Fig. liUnit 50GS and 50GX
METERING DEVICE ACUTROL DEVICE ............. 22
LIQUID LINE STRAINER .............................................. 22
Troubleshooting ............................................................................ 22
Start-Up Checklist ........................................................................ 22
NOTE TO INSTALLER Belk_rethe installation, READ THESE
INSTRUCTIONS CAREFULLY AND COMPLETELY. Also,
make sure the User's Manual and Replacement Guide are leli 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 qualilied personnel should install, repair, or service
air-conditioning equipment.
Untrained personnel can perli_rm basic maintenance l_.lnctions of
cleaning coils and lilters. All other operations should be perlormed
by trained service personnel. When working on air-conditioning
equipment, observe precautions in the literature, tags, and labels
attached to the uniL and other sali_ty precautions that may apply.
Follow all sali_ty codes. Wear salbty glasses and work gloves. Use
quenching cloth lor unbrazing operations. Have fire extinguisher
available lkn" all brazing operations. Consult a qualified installer or
service agency lin" inli_rmation or assistance. The qualified in-
staller or agency must use only factory-authorized kits or acces-
sories when modifying this product.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 101 Printed in U.S.A. Catalog No. 50GS-4SI Pg 1 2-06 Replaces: New
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