Installation Manual

4
MAJOR COMPONENTS
The unit includes a hermetically sealed refrigerating system (consisting
of a compressor, condenser coil, evaporator coil with flowrator), an in-
door blower, a condenser fan and all necessary internal electrical wir-
ing. The heat pump also includes a reversing valve, solenoid, defrost
thermostat and control and loss of charge protection. The system is
factory-evacuated, charged and performance tested. Refrigerant amount
and type are indicated on rating plate.
PRE-INSTALLATION CHECKS
Before attempting any installation, the following points should be con-
sidered:
• Structural strength of supporting members
• Clearances and provision for servicing
• Power supply and wiring
• Air duct connections
• Drain facilities and connections
• Location may be on any four sides of a home,
manufactured or modular, to minimize noise
CLEARANCES AND ACCESSIBILITY
The unit is designed to be located outside the building with unob-
structed condenser air inlet and discharge. Additionally, the unit
must be situated to permit access for service and installation. Con-
denser air enters from three sides. Air discharges upward from the
top of the unit. Refrigerant gauge connections are made on the right
side of the unit as you face the compressor compartment. Electrical
connections can be made either on the right, bottom or duct panel
side of the unit. The best and most common application is for the
unit to be located 10” from wall (4” minimum) with the connection
side facing the wall. This “close to the wall” application minimizes
exposed wiring.
Close to the wall application assures free, unobstructed air to the
other two sides. In more confined application spaces, such as
corners provide a minimum 12” clearance on all air inlet sides.
Allow 36” minimum for service access to the compressor com-
partment and controls. The top of the unit should be completely
unobstructed. If units are to be located under an overhang, there
should be a minimum of 48” clearance and provisions made to
deflect the warm discharge air out from the overhang.
UNIT LOCATION
Consider the affect of outdoor fan noise on conditioned space and
any adjacent occupied space. It is recommended that the unit be
placed so that condenser air discharge does not blow toward
windows less than 25 feet away. Consideration should also be
given to shade and unit appearance.
Heat pumps require special location consideration in areas of
heavy snow accumulation and/or areas with prolonged continu-
ous subfreezing temperatures. Heat pump unit bases have holes
under the outdoor coil to permit drainage of defrost water accumu-
lation. The unit must be situated to permit free unobstructed drain-
age of the defrost water and ice. A minimum 2" clearance under the
outdoor coil is required in the milder climates.
GROUND L EVEL P RE-INSTALLATION D ETAILS
The unit should be set on a solid, level foundation - preferably a
concrete slab at least 4 inches thick. The slab should be above ground
level and surrounded by a graveled area for good drainage. Any slab
used as a unit’s foundation should not adjoin the building as it is
possible that sound and vibration may be transmitted to the structure.
Ground Level Installation
ROOF TOP PRE-INSTALLATION DETAILS
Ensure that the roof is weather tight and allows proper drainage of
condensation. Use steel or treated wood beams as unit support
for load distribution.
NOTE: To ensure proper condensate drainage, unit must be in-
stalled in a level position.
• To avoid possible property damage or personal injury, the
roof must have sufficient structural strength to carry the
weight of the unit(s) and snow or water loads as required
by local codes. Consult a structural engineer to determine
the weight capabilities of the roof.
• The unit may be installed directly on wood floors or on
Class A, Class B, or Class C roof covering material.
• To avoid possible personal injury, a safe, flat surface for
service personnel should be provided.
Rooftop Installation
ROOF CURB INSTALLATIONS ONLY
NOTE: Sufficient structural support must be determined prior to
locating and mounting the curb and package unit.
Curb insulation, cant strips, flashing and general roofing material
are furnished by the contractor.
Curbing must be installed in compliance with the National Roof-
ing Contractors Association Manual. Construct duct work using
current industry guidelines. The duct work must be placed into the
roof curb before mounting the package unit.