50ZP036-060
3-Phase Single-Packaged Air Conditioners
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installation, Start-Up and Service instructions
HEATING & COOLING
NOTE: Read the entire instruction manual belk_re starting the
installation.
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
SLAB MOUNT ................................................................... 2
Provide Clearances .................................................................... 2
Place Unit .................................................................................. 2
Select and Install Ductwork ..................................................... 2
INSTALL FLANGES FOR DUCTWORK CONNEC-
TIONS (50ZPI)6t) ONLY) ................................................... 2
CONVERTING HORIZONTAL DISCHARGE UNITS TO
DOWNFLOW (VERTICAL) DISCHARGE ...................... 6
Provide lk_rCondensate Disposal ............................................. 6
Install Electrical Connections ................................................... 7
HIGH-VOLTAGE CONNECTIONS .................................. 7
ROUTING POWER LEADS INTO UNIT ........................ 8
CONNECTING GROUND LEAD TO UNIT GROUND.8
ROUTING CONTROL POWER WIRES .......................... 8
ACCESSORY ELECTRIC HEAT WIRING ..................... 8
SPECIAL PROCEDURES FOR 208-V OPERATION .....8
PRE-START-UP ............................................................................ 9
START-UP ..................................................................................... 9
Check lor Refl'igerant Leaks .................................................... 9
LOCATE AND REPAIR REFRIGERANT LEAKS AND
CHARGE THE UNIT AS FOLLOWS: ............................. 9
Start-Up Cooling Section and Make Adjustments ................ 10
CHECKING COOLING CONTROL OPERATION ....... 10
Refrigerant Charge .................................................................. 10
NO CHARGE .................................................................... 10
LOWCHARGE COOLING ............................................... 10
TO USE COOLING CHARGING CHARTS .................. 10
Indoor Airflow and Airflow Adjustn-ients .............................. 10
FOR 208/230-V ................................................................. 11
FOR 460-V MOTORS ...................................................... 11
Unit Controls ........................................................................... l l
HIGH-PRESSURE RELIEF VALVE ............................... 11
COMPRESSOR OVERLOAD .......................................... 11
Sequence of Operation ............................................................ 11
FAN OPERATION ............................................................ 11
COOLING .......................................................................... 11
HEATING .......................................................................... 11
MAINTENANCE ......................................................................... 12
Air Filter .................................................................................. 16
Unit Top Removal (Condenser-Coil Side) ............................ 16
C00155
Fig. liUnit 50ZP
Evaporator Blower and Motor ................................................ 16
Condenser Coil, Evaporator Coil, and Condensate Drain Pan. 16
Condenser Fan ........................................................................ 17
Electrical Controls and Wiring ............................................... 18
Reli"igerant Circuit .................................................................. 18
Evaporator Airflow ................................................................. 18
Metering Devices .................................................................... 18
Liquid Line Strainer ................................................................ 18
TROUBLESHOOTING ............................................................... 18
START-UP CHECKLIST ............................................................ 18
NOTE TO 1NSTALLER--Belk_re 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 systen-i pressure and electrical components. Only
trained and qualified workers should install, repair, or service
air-conditioning equipment.
Untrained workers can perlkmn basic maintenance l_.lnctions of
cleaning coils and lilters. All other operations should be perlbm_ed
by trained service people. When working on air-conditioning
equipment, pay attention to precautions in the literature, tags, and
labels attached to the unit, and other salk:ty precautions that may
apply.
Follow all sallcty codes. Wear sal_:ty glasses and work gloves. Use
quenching cloth lk_runbrazing operations. Have flrc extinguisher
available Ik_rall brazing operations.
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. 50ZP-5SI Pg 1 2-06 Replaces: New
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