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Before installing any of the system components, be sure to
examine each pipe, fitting, and valve, and remove any dirt or
foreign material found in or on these components.
INSPECT UNIT — To prepare the unit for installation, com-
plete the procedures listed below:
1. Compare the electrical data on the unit nameplate with
ordering and shipping information to verify that the
correct unit has been shipped.
2. Do not remove the packaging until the unit is ready for
installation.
3. Verify that the unit’s refrigerant tubing is free of kinks or
dents, and that it does not touch other unit components.
4. Inspect all electrical connections. Be sure connections are
clean and tight at their terminations.
5. Loosen compressor bolts until the compressor rides freely
on springs. Remove shipping restraints.
6. Remove the four
1
/
4
in. shipping bolts from compressor
support plate (two bolts on each side) to maximize vibra-
tion and sound alternation.
7. Remove any blower support cardboard from inlet of the
blower.
8. Locate and verify any accessory kit located in compressor
and/or blower section.
9. Remove any access panel screws that may be difficult to
remove once unit is installed.
CAUTION
DO NOT store or install units in corrosive environments or
in locations subject to temperature or humidity extremes
(e.g., attics, garages, rooftops, etc.). Corrosive conditions
and high temperature or humidity can significantly reduce
performance, reliability, and service life. Always move
units in an upright position. Tilting units on their sides may
cause equipment damage.
CAUTION
Failure to remove shipping brackets from spring-mounted
compressors will cause excessive noise and could cause
component failure due to added vibration.
Field-Supplied
Electric Heat
(if applicable)
Filter Access
Integral hanger support-
pre-attached in factory
Field-supplied transition to
minimize pressure loss
3/8” threaded rods
(by others)
Return Air
(Ductwork
not shown)
Thermostat
Wiring
Power Wiring
Balancing Valve (field-
installed accessory)
Stainless steel
braid hose
with integral
“J” swivel
3/8” Threaded
Rod (by others)
Supply Air
Insulated supply duct with
at least one 90 degree elbow
to reduce air noise
(field-supplied)
Flexible
Connection
Vibration Isolator
(white-compressor end
and red-blower end)
Washer
(by others)
Double Hex Nuts
(by others)
Unit Power
Unit Power
Disconnect
(by others)
Unit Hanger
(factory-
supplied)
Low Pressure Drop Water
Control Valve (optional)
(field-installed accessory)
Ball Valve with optional
integral P/T plug (typical for supply
and return piping)
(field-installed accessory)
(field-installed
accessory)
Aux Electric
Heat Disconnect
Water In
Water Out
Building
Loop
Fig. 1 — Typical Installation — 50PSH Unit
UNIT HANGER ISOLATION DETAIL
A50-7728