NOTE: Read the entire instruction manual before starting the installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS.....................................................................................................................................................................................2
INTRODUCTION..........................................................................................................................................................................................................2
RECEIVING AND INSTALLATION..........................................................................................................................................................................2
Check Equipment .....................................................................................................................................................................................................2
IDENTIFY UNIT................................................................................................................................................................................................2
INSPECT SHIPMENT........................................................................................................................................................................................4
Provide Unit Support................................................................................................................................................................................................4
SLAB MOUNT...................................................................................................................................................................................................4
GROUND MOUNT ............................................................................................................................................................................................4
Provide Clearances ...................................................................................................................................................................................................4
Place Unit .................................................................................................................................................................................................................4
Select and Install Ductwork.....................................................................................................................................................................................4
CONVERTING HORIZONTAL DISCHARGE UNITS TO DOWNFLOW (VERTICAL) DISCHARGE ........................................5
Provide for Condensate Disposal.............................................................................................................................................................................5
Install Electrical Connections ..................................................................................................................................................................................6
HIGH-VOLTAGE CONNECTIONS .................................................................................................................................................................6
ROUTING POWER LEADS INTO UNIT........................................................................................................................................................7
CONNECTING GROUND LEAD TO UNIT GROUND.................................................................................................................................7
ROUTING CONTROL POWER WIRES..........................................................................................................................................................7
ACCESSORY ELECTRIC HEAT WIRING.....................................................................................................................................................8
PRE-START-UP............................................................................................................................................................................................................9
START-UP ...................................................................................................................................................................................................................10
Check for Refrigerant Leaks..................................................................................................................................................................................10
LOCATE AND REPAIR REFRIGERANT LEAKS AND CHARGE THE UNIT AS FOLLOWS: ...........................................................10
Start-Up Cooling Section and Make Adjustments ................................................................................................................................................10
CHECKING COOLING CONTROL OPERATION.......................................................................................................................................10
Refrigerant Charge .................................................................................................................................................................................................10
NO CHARGE....................................................................................................................................................................................................10
LOW CHARGE COOLING.............................................................................................................................................................................11
HEATING MODE CHARGE ..........................................................................................................................................................................17
Indoor Airflow and Airflow Adjustments .............................................................................................................................................................11
FOR 208/230-V.................................................................................................................................................................................................12
Unit Controls ..........................................................................................................................................................................................................12
HIGH-PRESSURE RELIEF VALVE ..............................................................................................................................................................12
LOSS OF CHARGE SWITCH ........................................................................................................................................................................12
COMPRESSOR OVERLOAD .........................................................................................................................................................................12
Sequence of Operation ...........................................................................................................................................................................................12
FAN OPERATION ...........................................................................................................................................................................................12
COOLING .........................................................................................................................................................................................................12
HEATING .........................................................................................................................................................................................................16
CONTINUOUS FAN........................................................................................................................................................................................16
DEFROST .........................................................................................................................................................................................................16
ELECTRIC RESISTANCE HEATING ...........................................................................................................................................................16
MAINTENANCE ........................................................................................................................................................................................................17
Air Filter .................................................................................................................................................................................................................17
Unit Top Removal (Outdoor-Coil Side)................................................................................................................................................................18
Indoor Blower and Motor ......................................................................................................................................................................................18
Outdoor Coil, Indoor Coil, and Condensate Drain Pan........................................................................................................................................18
Outdoor Fan............................................................................................................................................................................................................19
Installation Manual
PA3Z
Single Packaged Air Conditioner
Catalog No. IM-PA3Z-01 Cancels: New Printed in U.S.A. 10-05
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