PRODUCT DESIGN
3
Amana PCC Package Cooling Units are designed for out-
door installations only in either residential or light commer-
cial applications.
The connecting ductwork (Supply and Return) can be con-
nected for either horizontal or vertical airflow. In the vertical
application a matching 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 accessible loca-
tion within the return air duct. The minimum filter area should
not be less than those sizes listed in the Specification Sec-
tion. Under no circumstances should the unit be operated
without return air filters.
A 3/4" pipe and external drain trap is provided for removal of
condensate water from the indoor coil. (Do not reduce the
drain line size).
Refrigerant flow control is achieved by use of restrictor ori-
fices.
The single phase units use permanent split capacitors (PSC)
design compressors. Starting components are therefore not
required. A low MFD run capacitor assists the compressor
to start and remains in the circuit during operation.
The outdoor fan and indoor blower motors are single phase
capacitor type motors (PCC60's use ECM motors).
Air for condensing (cooling cycle) is drawn through the out-
door coil by a propeller fan, and is discharged vertically out
the top of the unit. The outdoor coil is designed for .0 static.
No additional restriction (ductwork) shall be applied.
Conditioned air is drawn through the filter(s), field installed,
across the coil and back into the conditioned space by the
indoor blower.
All models of PCC series package units use the Compliant
Scroll compressor, there are a number of design characteris-
tics which are different from the traditional reciprocating com-
pressor.
-
Due to their design Scroll compressors are inherently more
tolerant of liquid refrigerant. NOTE: Even though the
compressor section of a Scroll compressor is more toler-
ant of liquid refrigerant, continued floodback or flooded
start conditions may wash oil from the bearing surfaces
causing premature bearing failure.
-
These Scroll compressors use white oil which is compat-
ible with 3GS. 3GS oil may be used if additional oil is
required.
-
Operating pressures and amp draws may differ from stan-
dard reciprocating compressors. This information may
be found in the "Cooling Performance Data" section.
Location and Clearances
36"
Maximum
Overhang
48" Minimum
Overhang
36" Side
Clearance
for Servicing
Recommended
Minimum 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 in-
stallations) the installer must provide service platform for ser-
vice person with rails or guards in accordance with local codes
or ordinances or in their absence with the latest edition of the
Uniform Mechanical Code Section 305.
NOTE: Unit can also use roof curb (and platform for leveling,
where necessary) to utilize bottom discharge.
WARNING
TO PREVENT POSSIBLE PROPERTY DAMAGE, THE UNIT
SHOULD REMAIN IN AN UPRIGHT POSITION DURING ALL
RIGGING AND MOVING OPERATIONS. TO FACILITATE
LIFTING AND MOVING IF A CRANE IS USED, PLACE THE
UNIT IN AN ADEQUATE CABLE SLING.
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.
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