Service manual

PRODUCT IDENTIFICATION
9
36"
Maximum
Overhang
48" Minimum
Overhang
36" Side
Clearance
for Servicing
Recommended
Minimum 9" Clearance
to Combustibles
36" Clearance for
Service Required
0" Minimum
Clearance to
Combustibles
Vinyl Coated
Canvas
Connections
Insulated
Return
Duct
Insulated
Supply
Duct
24" Clearance
(Condenser End)
In installations where the unit is installed above ground level
and not serviceable from the ground (Example: Roof Top
installations) the installer must provide a service platform for
the service person with rails or guards in accordance with
local codes or ordinances or in their absence with the latest
edition of the National Fuel Gas Code ANSIZ223.1.
NOTE: The flue outlet hood and air inlet hood (Package Gas Units) are
packaged separately inside the unit and must be installed prior to operation.
NOTE: Units can also use roof curb (and platform for leveling, where
necessary) to utilize bottom discharge.
WARNING
TO PREVENT POSSIBLE DAMAGE, THE UNIT
SHOULD REMAIN IN AN UPRIGHT POSITION DUR-
ING ALL RIGGING AND MOVING OPERATIONS. TO
FACILITATE LIFTING AND MOVING IF A CRANE IS
USED, PLACE THE UNIT IN AN ADEQUATE CABLE
SLIDE.
IMPORTANT: If using bottom discharge with roof curb,
ductwork should be attached to the curb prior to installing
the unit.
Refer to Roof curb Installation Instructions for proper curb
installation. Curbing must be installed in compliance with
the National Roofing Contractors Association Manual.
Lower unit carefully onto roof mounting curb. While rig-
ging unit, center of gravity will cause condenser end to be
lower than supply air end.
Amana Package Units are designed for outdoor installa-
tions only in either residential or light commercial applica-
tions.
The connecting ductwork (Supply and Return) can be con-
nected for either horizontal or down discharge airflow.
140,000 BTU gas package units and PHB60C package
units are not recommended for down discharge airflow
applications. In the down discharge applications a match-
ing Roof Curb is recommended
A return air filter must be installed behind the return air
grille(s) or provision must be made for a filter in an acces-
sible location within the return air duct. The minimum fil-
ter area should not be less than those sizes listed in the
Specification Section. Under no circumstances should
the unit be operated without return air filters.
A 3/4" tube is provided for removal of condensate water
from the indoor coil. In order to provide proper conden-
sate flow, a drain trap is built into the unit. (Do not reduce
the drain line size).
Refrigerant flow control is achieved by use of restrictor
orifices or thermostatic expansion valves (TXV).
Package Heat Pump models use a combination of
restrictor orifices and thermostatic expansion valves for
refrigerant flow control.
Some heat pump models also have a suction line accu-
mulator installed between the reversing valve and the com-
pressor. The object of the accumulator is to:
1. Provide a liquid refrigerant storage vessel during pro-
longed system off cycles.
2. Store excess liquid refrigerant not needed by the sys-
tem while running.
3. Return to the compressor at a controlled rate oil and
saturated vapor.
4. Retain stored excess refrigerant during a sudden sys-
tem pressure fluctuation such as seen in defrost cycles.