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INSTALLATION
STEP 1 —Check Equipment and Job Site
Unpack Unit
Move to final location. Remove carton taking care not to damage
unit.
Inspect Equipment
File claim with shipping company prior to installation if shipment
is damaged or incomplete. Locate unit rating plate on unit corner
panel. It contains information needed to properly install unit.
Check rating plate to be sure unit matches job specifications.
STEP 2 —Install on a Solid, Level Mounting Pad
If conditions or local codes require the unit be attached to pad,
tiedown bolts should be used and fastened through knockouts
provided in unit base pan. Refer to unit mounting pattern in
Fig. 3 to determine base pan size and knockout hole location.
For hurricane tie downs, contact distributor for details and PE
Certification (Professional Engineer), if required.
On rooftop applications, mount on level platform or frame. Place
unit above a load- -bearing wall and isolate unit and tubing set
from structure. Arrange supporting members to adequately
support unit and minimize transmission of vibration to building.
Consult local codes governing rooftop applications.
Roof mounted units exposed to winds above 5 mph may require
wind baffles. Consult the Service Manual - - Residential Split
System Air Conditioners and Heat Pumps for wind baffle
construction.
NOTE:
Unit must be level to within ±2° (±3/8 in./ft.) per
compressor manufacturer specifications.
STEP 3 —Clearance Requirements
When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Allow 30- -in. clearance to
service end of unit and 48 in. above unit. For proper airflow, a
6- -in. clearance on 1 side of unit and 12 in. on all remaining sides
must be maintained. Maintain a distance of 24 in. between units.
Position so water, snow, or ice from roof or eaves cannot fall
directly on unit.
3/8- -IN.
DIA.
TIEDOWN
KNOCKOUTS IN BASEPAN
(2) PLACES
VIEW FROM
UNIT BASE PAN
TIEDOWN KNOCKOUT LOCATIONS
DIMENSIONS
A
(IN.)
29- - 1/2 X 33
10–1/16
36–1/2 X 40
9–5/8
Fig. 3 --- Tiedown Knockout Requirements
TOP
(IN.)
B
C
5–5/8
23–3/4
6–13/16
28–3/4
A05177
On rooftop applications, locate unit at least 6 in. above roof
surface.
STEP 4 —Operating Ambient
The minimum outdoor operating ambient in cooling mode is
55°F, and the maximum outdoor operating ambient in cooling
mode is 125°F. The maximum outdoor operating ambient in
heating mode is 66 °F.
STEP 5 —Elevate Unit
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Unit must be kept free of an accumulation of water
and/or ice in the basepan.
Elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate
drainage of unit. If using accessory support feet, use installation
instructions from kit for installation.
CAUTION
!
EQUIPMENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
To prevent damage to the unit, ensure that it is located
with the supports such that the unit is stable in all
circumstances including adverse conditions.
STEP 6 —Install Thermostatic Expansion Valve (TXV)
NOTE: Applies to non- -TXV indoor units only. If installing a
rated and approved indoor coil without a factory- -installed Puron
TXV, remove and replace the fixed orifice or
expansion device with a hard shutoff Puron TXV.
The TXV is specifically designed to operate with Puron
Refrigerant. Do not use an R- -22 TXV. An existing R- -22 TXV
must be replaced with a factory- -approved TXV specifically
designed for Puron refrigerant. Refer to Product Data Digest for
the appropriate TXV kit number.
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
All indoor coil units must be installed with a hard
shutoff Puron TXV metering device.
IMPORTANT: If not factory installed, the TXV should be
mounted as close to the indoor coil as possible and in a vertical,
upright position. Avoid mounting the inlet tube vertically down.
Valve is more susceptible to malfunction due to debris if inlet
tube is facing down. A factory- -approved filter drier must be
installed in the liquid line.
3
R- -22 TXV
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