CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . . . . 1-4
I. General
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
RECEIVING AND INSTALLATION
. . . . . . . . . . . . . . . . . . 5-10
I. Step 1 — Check Equipment
. . . . . . . . . . . . . . . . . . 5
II. Step 2 — Provide Unit Support
. . . . . . . . . . . . . . . 5
III. Step 3 — Provide Clearances
. . . . . . . . . . . . . . . . 5
IV. Step 4 — Place Unit
. . . . . . . . . . . . . . . . . . . . . . . . 5
V. Step 5 — Select and Install Ductwork
. . . . . . . . . . 6
VI. Step 6 — Provide for Condensate
Disposal
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
VII. Step 7 — Install Electrical Connections
. . . . . . . . . 7
PRE-START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-14
I. Check for Refrigerant Leaks
. . . . . . . . . . . . . . . . . 11
II. Start-Up Cooling Section and
Make Adjustments
. . . . . . . . . . . . . . . . . . . . . . . . . 11
III. Refrigerant Charge
. . . . . . . . . . . . . . . . . . . . . . . . . 11
IV. Indoor Airflow and Airflow Adjustments
. . . . . . . 14
V. Unit Controls
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
VI. Sequence of Operation
. . . . . . . . . . . . . . . . . . . . . 14
MAINTENANCE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-17
I. Air Filter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
II. Unit Top Removal (Condenser
Coil Side)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
III. Evaporator Blower and Motor
. . . . . . . . . . . . . . . . 16
IV. Condenser Coil, Evaporator Coil,
and Condensate Drain Pan
. . . . . . . . . . . . . . . . . . 16
V. Condenser Fan
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
VI. Electrical Controls and Wiring
. . . . . . . . . . . . . . . 17
VII. Refrigerant Circuit
. . . . . . . . . . . . . . . . . . . . . . . . . 17
VIII. Evaporator Airflow
. . . . . . . . . . . . . . . . . . . . . . . . . 17
IX. Metering Devices
. . . . . . . . . . . . . . . . . . . . . . . . . . 17
X. Liquid Line Strainer
. . . . . . . . . . . . . . . . . . . . . . . . 17
TROUBLESHOOTING COOLING CHART
. . . . . . . . . . . . 18
START-UP CHECKLIST
. . . . . . . . . . . . . . . . . . . . . . . . . . CL-1
NOTE TO INSTALLER —
Before the installation, READ
THESE INSTRUCTIONS CAREFULLY AND COMPLETELY.
Also, make sure the Owner’s Manual and Service Instruc-
tions 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 compo-
nents. Only trained and qualified workers should install,
repair, or service air-conditioning equipment.
Untrained workers can perform basic maintenance func-
tions of cleaning coils and filters. All other operations should
be performed 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 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.
WARNING:
Before performing service or mainte-
nance operations on system, turn off main power to unit.
Turn off accessory heater power switch if applicable. Elec-
trical shock can cause personal injury.
I. GENERAL
The PA1Z cooling unit is fully self-contained and designed
for outdoor installation. See Fig. 1. As shown in Fig. 2-4, units
are shipped in a horizontal-discharge configuration for instal-
lation on a ground-level slab. All units can be field-converted
to downflow discharge configurations for rooftop applications
with a field-supplied plenum.
Fig. 1 — Unit PA1Z (Size 036 Shown)
installation, start-up and
service instructions
PACKAGED AIR
CONDITIONERS
PA1Z
Sizes 024-060
Cancels: New
II PA1Z-24-1
11/15/97
Summary of Contents for PA1Z Series
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