GH7T: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
2
Installation
Check Equipment and Job Site
IMPORTANT: All split system and packaged heat pumps must be
installed pursuant to applicable regional efficiency standards issued by
the Department of Energy.
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.
Install on a Solid, Level Mounting Pad
If conditions or local codes require the unit be attached to pad, tie down
bolts should be used and fastened through knockouts provided in unit
base pan. Refer to unit mounting pattern in Fig. 2 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 (8.05 km/h) 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,±9.5 mm/m.) per
compressor manufacturer specifications.
Clearance Requirements
When installing, allow sufficient space for airflow clearance, wiring,
refrigerant piping, and service. Allow 24 in. (609.6 mm) clearance to
service end of unit and 48 in. (1219.2 mm) (above unit. For proper
airflow, a 6-in. (152.4 mm) clearance on 1 side of unit and 12-in. (304.8
mm) on all remaining sides must be maintained. Maintain a distance of
24 in. (609.6 mm) between units. Position so water, snow, or ice from
roof or eaves cannot fall directly on unit.
On rooftop applications, locate unit at least 6 in. (152.4 mm) above roof
surface.
A05177
Fig. 2 – Tiedown Knockout Locations
Check Defrost Thermostat
Check defrost thermostat to ensure it is properly located and securely
attached. There is a liquid header with a distributor and feeder tube
going into outdoor coil. At the end of the one of the feeder tubes, there is
a 3/8 in. O.D. stub tube approximately 2 in. long. (See Fig. 3.) The
defrost thermostat should be located on stub tube. Note that there is only
one stub tube used with liquid header, and on most units it is the bottom
circuit.
A97517
Fig. 3 – Defrost Thermostat Location
Elevate Unit
Elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate drainage
of unit.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and wear
appropriate protective clothing and gloves when handling parts.
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Locate the unit in such a way that it is stable in all circumstances
including adverse weather conditions.
UNIT BASE PAN
Dimension in.
(mm)
TIEDOWN KNOCKOUT LOCATIONS in. (mm)
A B C
35 X 35
(889 X 889)
9–1/8 (231.8) 6–9/16 (166.7) 28–7/16 (722.3)
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in equipment damage or
improper operation.
Do not allow water and/or ice to build up in base pan.
FEEDER TUBE
DEFROST
THERMOSTAT
A97517
STUB TUBE
COIL
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