
PRODUCT DESIGN
19
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 installa-
tions) 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
T
O PREVENT POSSIBLE DAMAGE, THE UNIT SHOULD REMAIN IN AN UPRIGHT
POSITION DURING ALL RIGGING AND MOVING OPERATIONS.
T
O 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 rigging
unit, center of gravity will cause condenser end to be lower
than supply air end.
Amana
®
brand Package Units are designed for outdoor in-
stallations only in either residential or light commercial ap-
plications.
The connecting ductwork (Supply and Return) can be con-
nected for either horizontal or down discharge airflow.
140,000 BTU PGB gas package units and PHB60C pack-
age 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 filter
area should not be less than those sizes listed in the Speci-
fication 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 condensate
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 ori-
fices 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 accumu-
lator 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 oil and saturated vapor to the compressor at a
controlled rate .
4. Retain stored excess refrigerant during a sudden sys-
tem pressure fluctuation such as seen in defrost cycles.