Unit Support - Payne PA13NR018 Installation Instructions Manual

UNIT SUPPORT
NOTE: Unit nmst be level _+ 2 degrees {3/8 inch rise or fall per
foot of run (10 mm rise or fall per 305 mm of run) } or compressor
may not flmction properly.
A. 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. 2.
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.
B. 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 fiat roof, locate unit minimum 6 inches (152
ram) 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 liatfilities.
C. 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 (see Fig. 2).
Contact local distributor for hurricane hold-down details and the
P.E. (Professional Engineer) certification, when required.
3/8" (10mm) dia. Tie Down Knockouts
In Basepan (2 places)
I View From Top I
Base
Pan
Depth
A
oO
Base Pan Width
Base Pan
W x D
23 x 23
(584 x 584)
25-11/16 x
25-11/16
(652 x 652)
31-1/8 x
31-1/8
(791 x 791)
A
7 - 6/4
(197)
9-1/16
(230)
Inches (mm)
Tie Down
Knockouts
B C
4-7/16 18
(113) (457)
4-7/16 21-1/4
(113) (540)
9-1/16 6-1/2 24-5/8
(230) (165) (625)
Minimum
Mounting Pad
Dimensions
23 x 23
(584 x 584)
26 x 26
(660 x 660)
31-1/2 x 61-1/2
(800 x 800)
Fig. 2 - Tie Down Knockouts
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.