Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . .
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
RECEIVING AND INSTALLATION . . . . . . . . . . .
·IDENTIFY UNIT
·INSPECT SHIPMENT
Step 2 Ð Provide Unit Support . . . . . . . . . . . . . . 13
·ROOF CURB
·SLAB MOUNT
Step 3 Ð Provide Clearances . . . . . . . . . . . . . . . . 13 Step 4 Ð Rig and Place Unit . . . . . . . . . . . . . . . . . 13
·UNITS WITHOUT BASE RAILS
·UNITS WITH OPTIONAL BASE RAILS
Step 5 Ð Select and Install Ductwork . . . . . . . . 16
·CONVERTING HORIZONTAL DISCHARGE
UNITS TO DOWNFLOW (VERTICAL) DISCHARGE
ÐSTD
·CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE
ÐICM UNITS
·ACCESSORY DUCT FLANGE KIT INSTALLATION
Step 6 Ð Provide for Condensate Disposal . . . 20 Step 7 Ð Install Electrical Connections . . . . . . 21
·
·ROUTING POWER LEADS INTO UNIT
·CONNECTING GROUND LEAD TO
·ROUTING CONTROL POWER WIRES Ð STD
·ROUTING CONTROL POWER WIRES Ð ICM UNITS (24 V)
·SPECIAL PROCEDURES FOR
Make Adjustments . . . . . . . . . . . . . . . . . . . . . . . . 27
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40,41
Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Unit Top Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Evaporator Blower and Motor . . . . . . . . . . . . . . . . 40
Condenser Coil, Evaporator Coil,
and Condensate Drain Pan . . . . . . . . . . . . . . . . 41
Condenser Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Electrical Controls and Wiring . . . . . . . . . . . . . . . 41
Refrigerant Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Evaporator Air¯ow . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Metering Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Liquid Line Strainer . . . . . . . . . . . . . . . . . . . . . . . . . 41
TROUBLESHOOTING COOLING CHART . . . . . 42,43
Fig. 1 Ð Unit 50SX With Optional Base Rail Shown
NOTE TO INSTALLER Ð Before the installation, READ THESE INSTRUCTIONS CAREFULLY AND COM- PLETELY. Also, make sure the Owner's Manual and Serv- ice Instructions are left with the unit after installation.
SAFETY CONSIDERATIONS
Installation and servicing of
Untrained personnel can perform basic maintenance func- tions of cleaning coils and ®lters. All other operations should be performed by trained service personnel. When working on
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have ®re ex- tinguisher available for all brazing operations.
Before performing service or maintenance operations on system, turn off main power to unit. Turn off accessory heater power switch if applicable. Electrical shock can cause personal injury.
General Ð 50SS,SX cooling units are fully
Instructions continued on page 13.
Manufacturer reserves the right to discontinue, or change at any time, speci®cations or designs without notice and without incurring obligations.
Book | 1 | 4 |
| PC 111 | Catalog No. | Printed in U.S.A. | Form | Pg 1 | Replaces: | |
Tab | 1b | 6b |
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