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ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury

or death.
Before installing or servicing system, always turn off main

power to system. There may be more than one disconnect

switch. Turn off accessory heater power switch if applicable.

WARNING

INTRODUCTION

The PA3P packaged air conditioner is fully self--contained and
designed for outdoor installation (See Fig. 1). See Fig. 2 and 3 for

unit dimensions. All unit sizes have discharge openings for both

horizontal and downflow configurations, and are factory shipped
with all downflow duct openings covered. The unit may be installed

either on a rooftop, gound--level cement slab, or directly on the
gound if local codes permit. (See Fig. 4 for roof curb dimensions.)

RECEIVING AND INSTALLATION

Step 1—Check Equipment

IDENTIFY UNIT
The unit model number and serial number are printed on the unit

informative plate. Check this information against shipping papers.
INSPECT SHIPMENT
Inspect for shipping damage while unit is still on shipping pallet. If
unit appears to be damaged or is torn loose from its anchorage, have

it examined by transportation inspectors before removal. Forward

claim papers directly to transportation company. Manufacturer is
not responsible for any damage incurred in transit. Check all items

against shipping list. Immediately notify the nearest equipment
distribution office if any item is missing. To prevent loss or damage,

leave all parts in original packages until installation.

Step 2—Provide Unit Support

For hurricane tie downs, contact distributor for details and PE

(Professional Engineering) Certificate if required.
ROOF CURB
Install accessory roof curb in accordance with instructions shipped
with curb (See Fig. 4). Install insulation, cant strips, roofing, and

flashing. Ductwork must be attached to curb.

IMPORTANT

: The gasketing of the unit to the roof curb is critical

for a water tight seal. Install gasketing material supplied with the
roof curb. Improperly applied gasketing also can result in air leaks
and poor unit performance.

Curb should be level to within 1/4 in. (See Fig. 6). This is necessary
for unit drain to function properly. Refer to accessory roof curb

installation instructions for additional information as required.
SLAB MOUNT
Place the unit on a solid, level concrete pad that is a minimum of 4

in. thick with 2 in. above grade. The slab should extend
approximately 2 in. beyond the casing on all 4 sides of the unit (See

Fig. 7). Do not secure the unit to the slab

except

when required by

local codes.
GROUND MOUNT
The unit may be installed either on a slab or placed directly on the
ground if local codes permit. Place the unit on level ground prepared

with gravel for condensate discharge.

Step 3—Provide Clearances

The required minimum service clearances are shown in Fig. 2 and
3. Adequate ventilation and outdoor air must be provided. The

outdoor fan draws air through the outdoor coil and discharges it

through the top fan grille. Be sure that the fan discharge does not

recirculate to the outdoor coil. Do not locate the unit in either a
corner or under an overhead obstruction. The minimum clearance

under a partial overhang (such as a normal house overhang) is 48 in.
above the unit top. The maximum horizontal extension of a partial

overhang must not exceed 48 in.

IMPORTANT

: Do not restrict outdoor airflow. An air restriction at

either the outdoor--air inlet or the fan discharge may be detrimental
to compressor life.

Do not place the unit where water, ice, or snow from an overhang
or roof will damage or flood the unit. Do not install the unit on

carpeting or other combustible materials. Slab--mounted units
should be at least 4 in. above the highest expected water and runoff

levels. Do not use unit if it has been under water.

Step 4—Field--Fabricate Ductwork

Secure all ducts to roof curb and building structure on vertical

discharge units. Do not connect ductwork to unit. For horizontal
applications, unit is provided with flanges on the horizontal

openings. All ductwork should be secured to the flanges. Insulate
and weatherproof all external ductwork, joints, and roof openings

with counter flashing and mastic in accordance with applicable
codes.
Ducts passing through an unconditioned space must be insulated

and covered with a vapor barrier. If a plenum return is used on a
vertical unit, the return should be ducted through the roof deck to

comply with applicable fire codes. A minimum clearance is not
required around ductwork. Cabinet return--air static shall not exceed

--.25 in. wc.

Step 5—Rig and Place Unit

Rigging and handling of this equipment can be hazardous for many

reasons due to the installation location (roofs, elevated structures,
etc.).
Only trained, qualified crane operators and ground support staff
should handle and install this equipment.
When working with this equipment, observe precautions in the
literature, on tags, stickers, and labels attached to the equipment, and

any other safety precautions that might apply.
Training for operators of the lifting equipment should include, but
not be limited to, the following:

1. Application of the lifter to the load, and adjustment of the

lifts to adapt to various sizes or kinds of loads.

2. Instruction in any special operation or precaution.
3. Condition of the load as it relates to operation of the lifting

kit, such as balance, temperature, etc.

Follow all applicable safety codes. Wear safety shoes and work
gloves.
INSPECTION
Prior to initial use, and at monthly intervals, all rigging brackets and
straps should be visually inspected for any damage, evidence of

wear, structural deformation, or cracks. Particular attention should
be paid to excessive wear at hoist hooking points and load support

areas. Brackets or straps showing any kind of wear in these areas