KeepRite C4A3 - Unit Support; Ground Level Installation; Roof Top Installation; Refrigeration System

INSTALLATION INSTRUCTIONS R−410A Split System Air Conditioner
4 421 01 5100 01
UNIT SUPPORT
NOTE: Unit must be level  2 degrees ( inch rise or fall
per foot of run) or compressor may not function 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 materi-
als such as concrete, bricks, blocks, steel, or pressure−
treated timbers approved for ground contact. Soil condi-
tions 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 Figure 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 recom-
mended 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 flat roof, locate unit minimum 6 inches
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 transmis-
sion 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 guaran-
teed roof, a release must be obtained from the building
owner to free the installer from all liabilities.
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 (refer to Figure 2).
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 proper-
ty damage.
Inadequate unit support may cause excessive
vibration, noise, and/or stress on the refrigerant
lines, leading to refrigerant line failure.
Figure 2 Tie Down Knockouts
Base
Pan
Depth
C
B
A
Base Pan Width
” dia. Tie Down Knockouts
In Base Pan (2 places)
VIEW
FROM
TOP
Base Pan
Width x Depth
Tie Down
Knockouts
Minimum
Mounting Pad
Dimensions
A B C
”  ” ” ” ”   ”
”  ” ” ” ”   ”
”  ” ” ” ” ”  ”
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 spe-
cific indoor coils. If there is a refrigerant mis−match, con-
sult 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 de-
vice. If any other type of metering device is installed on
the indoor coil, consult the indoor coil manufacturer to de-
termine 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.