Safety Considerations; Introduction; Receiving And Installation; Check Equipment - Payne PA3Z Installation Instructions Manual

SAFETY CONSIDERATIONS

Installation and servicing of this equipment can be hazardous due
to mechanical and electrical components. Only trained and
qualified personnel should install, repair, or service this equipment.
Untrained personnel can perform basic maintenance functions such
as cleaning and replacing air filters. All other operations must be
performed by trained service personnel. When working on this
equipment, observe precautions in the literature, on tags, and on
labels attached to or shipped with the unit and other safety
precautions that may apply.
Follow all safety codes. Installation must be in compliance with
local and national building codes. Wear safety glasses, protective
clothing, and work gloves. Have fire extinguisher available. Read
these instructions thoroughly and follow all warnings or cautions
included in literature and attached to the unit.
Recognize safety information. This is the safety- -alert symbol
When you see this symbol on the unit and in instructions or manu-
als, be alert to the potential for personal injury. Understand these
signal words: DANGER, WARNING, and CAUTION. These
words are used with the safety- -alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury
or death. WARNING signifies hazards which could result in per-
sonal injury or death. CAUTION is used to identify unsafe practic-
es which may result in minor personal injury or product and prop-
erty damage. NOTE is used to highlight suggestions which will
result in enhanced installation, reliability, or operation.
WARNING
!
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 and install lockout tag. There may be
more than one disconnect switch. Turn off accessory heater
power switch if applicable.

INTRODUCTION

The PA3Z packaged air conditioner is fully self- -contained and
designed for outdoor installation (See Fig. 1). Standard units are
shipped in a horizontal- -discharge configuration for installation on
a ground- -level slab or directly on the ground if local codes permit.
Standard units can be converted to downflow (vertical) discharge
configurations for rooftop applications with a field supplied
plenum.

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.

SLAB MOUNT

Place the unit on a solid, level concrete pad that is a minimum of 4
in. (101.6 mm) thick with 2 in. (50.8 mm) above grade. The slab
should extend approximately 2 in. (50.8 mm) beyond the casing on
all 4 sides of the unit. Do not secure the unit to the slab except
when required by local codes.
A 6- -in. (152.4 mm) wide gravel apron should be used around the
flat surface to prevent airflow blockage by grass or shrubs. The
unit should be level within 1/4 in. (6.4 mm). This is necessary for
the unit drain to function properly.

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. 5.
.
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. (1219 mm) above the unit top. The maximum horizontal
extension of a partial overhang must not exceed 48 in. (1219 mm).
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. (101.6 mm) above the highest expected
water and runoff levels. Do not use unit if it has been under water.
Step 4 — Place Unit
Unit can be moved with the rigging holds provided in the unit
base. Refer to Table 1 for shipping weights. Use extreme caution to
prevent damage when moving the unit. Unit must remain in an
upright position during all moving operations. The unit must be
level with in 1/4 in. (6.4 mm) for proper condensate drainage; the
ground- -level pad must be level before setting the unit in place.
When a field- -fabricated support is used, be sure that the support is
level and that it properly supports the unit.
Step 5 — Select and Install Ductwork
The design and installation of the duct system must be in
accordance with the standards of the NFPA for installation of
non- -residence type air conditioning and ventilating systems,
NFPA 90A or residence type, NFPA 90B and/or local codes and
ordinances.
Select and size ductwork, supply- -air registers, and return air grilles
according to ASHRAE
Refrigeration, and Air Conditioning Engineers) recommendations.
Use the duct flanges provided on the supply- - and return- -air
openings on the side of the unit. See Fig. 5 for connection sizes
and locations. The 14- -in. (355.6 mm) round duct collars are
shipped inside the unit attached to the base pan in the indoor
blower compartment. They are field- -installed and must be
removed from the indoor blower compartment prior to start- -up,
even if they are not used for installation.
2
(American Society of Heating,