Unit Support; Refrigeration System - Payne PA3A Installation Instructions Manual

UNIT SUPPORT

NOTE: Unit must be level ± 2 degrees (3/8 inch rise or fall per
foot of run) or compressor may not function properly.
Ground Level Installation
The unit must be level and supported above grade by beams,
platform, or a pad. Platform or pad can be of open or solid
construction but should be of permanent materials such as
concrete, bricks, blocks, steel, or pressure- - treated timbers
approved for ground contact. Soil conditions must be considered
so that the platform or pad does not shift or settle and leave the unit
partially supported. Minimum pad dimensions are shown in Fig.
1.
If beams or an open platform are used for support, it is
recommended that the soil be treated or area be graveled to reduce
the growth of grasses and weeds.
To minimize vibration or noise transmission, it is recommended
that supports not be in contact with the building structure.
However, slabs on grade constructions with an extended pad are
normally acceptable.
Roof Top Installation
This type of installation is not recommended on wood frame
structures where low noise levels are required.
Supporting structure or platform for the unit must be level. If
installation is on a flat roof, locate unit minimum 6 inches 152
mm) above roof level.
Place the unit over one or more load bearing walls. If there are
several units, mount them on platforms that are self- -supporting
and span several load bearing walls. These suggestions are to
minimize noise and vibration transmission through the structure. If
the structure is a home or apartment, avoid locating the unit over
bedrooms or study.
NOTE: When unit is to be installed on a bonded guaranteed roof,
a release must be obtained from the building owner to free the
installer from all liabilities.
Fastening Unit down
If conditions or local codes require the unit be attached in place,
remove the knockouts in the base pan and install tie down bolts
through the holes (refer to Fig. 1).
Contact local distributor for hurricane hold- -down details and the
P.E. (Professional Engineer) certification, when required.
CAUTION
!
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property
damage.
Inadequate unit support may cause excessive vibration,
noise, and/or stress on the refrigerant lines, leading to
refrigerant line failure.
3/8" Dia. Tie Down Knockouts
In Base Pan (2 places)
A
Base Pan Width
Base Pan Width x
Knockouts in. (mm)
Depth
in. (mm)
A
25 ---3/4 x 26 ---5/16
(654 x 668)
31 ---3/16 9 ---1/8
(792) (232)
35 x 36 ---9/16
(889 x 923)
Fig. 1 --- Tie Down Knockouts

REFRIGERATION SYSTEM

A. COMPONENT MATCHES
Check to see that the proper system components are in place,
especially the indoor coil.
R- -410A outdoor units can only be used with R- -410A specific
indoor coils. If there is a refrigerant mis- -match, consult the indoor
coil manufacturer to determine if a refrigerant conversion kit is
available for the indoor coil.
This outdoor unit is designed for use only with indoor coils that
utilize a hard shut- -off TXV refrigerant metering device. If any
other type of metering device is installed on the indoor coil, consult
the indoor coil manufacturer to determine if a hard shut- -off TXV
conversion kit is available.
CAUTION
!
PRODUCT DAMAGE HAZARD
Failure to follow this caution may result in product damage.
Indoor coil and outdoor unit must be listed as a certified
combination (match) in the ARI Unitary Directory of
Certified Products. Indoor coil must have R- -410A specific,
hard shut- -off TXV refrigerant metering device.
2
VIEW
FROM
TOP
Base
Pan
Depth
C
B
Minimum
Tie Down
Mounting Pad
Dimensions
B C
in. (mm)
4 ---7/8 21 ---1/4
26 x 26--1/2
(124) (540)
(660 x 673)
6 ---9/1
31 ---1/2 x 32 ---1/2
24--11/16
6
(800 x 826)
(627)
(167)
6--9/16 28--7/16 35 x 36--1/2
(167) (722) (889 x 927)
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