Payne PA1R Series, Installation, Start-Up And Service Instructions Manual, Page: 1 / 36

CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
I. Step 1 — Provide Unit Support . . . . . . . . . . . . . 1
II. Step 2 — Field Fabricate Ductwork
. . . . . . . . . . 2
III. Step 3 — Install External Trap for
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . 2
IV. Step 4 — Rig and Place Unit
. . . . . . . . . . . . . . . 2
V. Step 5 — Make Electrical Connections . . . . . . . 7
VI. Step 6 — Make Outdoor-Air Adjustments
and Install Outdoor-Air Hood . . . . . . . . . . . . . . . 9
VII. Step 7 — Adjust Evaporator-Fan Speed
. . . . . . 15
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24,25
I. Unit Preparation
. . . . . . . . . . . . . . . . . . . . . . . . . . 24
II. Return-Air Filters . . . . . . . . . . . . . . . . . . . . . . . . . 24
III. Compressor Mounting . . . . . . . . . . . . . . . . . . . . . 24
IV. Internal Wiring
. . . . . . . . . . . . . . . . . . . . . . . . . . . 24
V. Refrigerant Service Ports . . . . . . . . . . . . . . . . . . 24
VI. Compressor Rotation . . . . . . . . . . . . . . . . . . . . . . 24
VII. Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
VIII. Safety Relief
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
IX. Ventilation (Continuous Fan) . . . . . . . . . . . . . . . 24
X. Operating Sequence . . . . . . . . . . . . . . . . . . . . . . 24
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-28
I. Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
II. Lubrication
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
III. Condenser-Fan Adjustment . . . . . . . . . . . . . . . . 26
IV. Condenser Coil Grille . . . . . . . . . . . . . . . . . . . . . 27
V. Refrigerant Charge . . . . . . . . . . . . . . . . . . . . . . . . 27
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-31
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . CL-1
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical compo-
nents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform the basic maintenance func-
tions of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe pre-
cautions 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 unit, turn off main power switch
to unit. Electrical shock could cause personal injury.
1. The power supply (volts, hertz, and phase) must corre-
spond to that specified on unit rating plate.
2. The electrical supply provided by the utility must be suf-
ficient to handle load imposed by this unit.
3. Identify locations of electrical inlets, condensate drain,
duct connections and required clearances before setting
unit in place.
4. This installation must conform with local building codes
and with NEC (National Electrical Code) or NFPA
(National Fire Protection Association) 54 TIA-54-84-1.
Refer to Provincial and local plumbing or wastewater
codes and other applicable local codes.
5. Approved for outdoor installation on wood flooring or on
class A, B, or C roof covering materials.
INSTALLATION
Unit is shipped in the vertical configuration. To convert to
horizontal configuration, remove screws from side duct open-
ing covers and remove covers. Using the same screws, install
covers on vertical duct openings with the insulation-side down.
Seals around duct openings must be tight. See Fig. 1.
NOTE: When installing any accessory item, see the man-
facturer’s installation instructions packaged with the
accessory.
A qualified installer or agency must use only factory-authorized
kits or accessories when modifying this unit.
I. STEP 1 — PROVIDE UNIT SUPPORT
A. Roof Curb
Assemble and install accessory roof curb in accordance with
instructions shipped with curb. See Fig. 2. Install insulation,
cant strips, roofing felt, and counter flashing as shown. Duct-
work must be attached to curb, not to the unit. If electric or
control power is to be routed through the basepan, attach the
accessory thru-the-bottom service connections to the base-
pan in accordance with the accessory installation instruc-
tions. Connections must be installed before unit is set on roof
curb.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket supplied with the
roof curb. Improperly applied gasket can also result in air
leaks and poor unit performance.
Curb should be level. This is necessary for unit drain to func-
tion properly. Unit leveling tolerances are shown in Fig. 3.
Refer to Accessory Roof Curb Installation Instructions for ad-
ditional information as required.
B. Slab Mount (Horizontal Units Only)
Provide a level concrete slab that extends a minimum of 6 in.
beyond unit cabinet. Install a gravel apron in front of con-
denser coil air inlet to prevent grass and foliage from
obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
installation, start-up and
service instructions
SINGLE PACKAGE ROOFTOP
ELECTRIC HEATING/ELECTRIC COOLING UNITS
PA1R
Sizes 036-072
3 to 6 Tons
Cancels: New II PA1R-36-1
2/15/98