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036-21528-007-A-1205
26 Unitary Products Group
MECHANICAL SPECIFICATIONS
GENERAL DESCRIPTION
Units shall be factory-assembled, single packaged,
Heat Pumps, designed for outdoor mounted installa-
tion. Units shall have minimum SEER ratings of 13.0.
They shall have built in, equal size, field convertible
duct connections for down discharge supply/return or
horizontal discharge supply/return.
The units shall be factory wired, piped, charged with R-
22 refrigerant and factory tested prior to shipment. All
unit wiring shall be both numbered and color coded.
All units shall be manufactured in a facility certified to
ISO 9001 standards, and the cooling performance shall
be rated in accordance with DOE and ARI test proce-
dures. Units shall be classified to UL 1995/CAN/CSA
No. 236-M90 conditions.
UNIT CABINET
1. Unit cabinet shall be constructed of G90 galva-
nized steel, with exterior surfaces coated with a
non-chalking, powered paint finish, certified at
1000 hours salt spray test per ASTM-B117 stan-
dards.
2. The unit top shall be a single piece “Water Shed”
design, with drip edges and no-seam corners to
provide optimum water integrity.
3. Unit shall have a rigidly mounted condenser coil
guard to provide protection from objects and per-
sonnel after installation.
4. Indoor blower section shall be insulated with up to
3/4” thick, aluminum, foil faced insulation, fastened
to prevent insulation from entering the air stream.
5. Cabinet panels shall be “large” size, easily remov-
able for servicing and maintenance, with built-in lift
handles.
6. Unit shall be built on a formed, “Super-Structure”
design base pan, with embossments at critical
points to add strength, rigidity and aid in minimizing
sound.
7. Full perimeter base rails shall be provided to
assure reliable transit of equipment, overhead rig-
ging, fork truck access and proper sealing on roof
curb applications. Base rails shall be removable,
when required, to lower unit height.
8. Filters shall be furnished and be accessible
through a removable access door, sealed air tight.
(Single phase models - accessory kit available.
Three phase models - standard from factory.)
9. Units vertical discharge and return duct configura-
tion shall be designed to fit between standard 24”
O.C. beams without modification to building struc-
ture, duct work and base unit.
10. Condensate pan shall be internally sloped and
conform to ASHRAE 62-89 self-draining standards,
with 3/4" NPTI copper, ridged mount connection.
INDOOR (SUPPLY) FAN ASSEMBLY
1. Fan shall be direct drive, constant CFM, ECM
design. Job site selected (BHP) brake horse power
shall not exceed the motors nameplate horse
power rating.
2. Fan wheel shall be double-inlet type with forward-
curved blades, dynamically balanced to operate
smoothly throughout the entire range of operation.
Airflow design shall be constant air volume.
3. Bearings shall be sealed and permanently lubri-
cated for longer life and no maintenance.
4. Fan assembly shall be “Slip Track” (slide-out)
design for easy removal and cleaning.
OUTDOOR FAN ASSEMBLY
1. The outdoor fan shall be of the direct-driven propel-
ler type, discharge air vertically, have aluminum
blades riveted to corrosion resistant steel spider
bracket and shall be statically balanced for smooth
operation.
2. The outdoor fan motor shall be totally enclosed
with permanently lubricated bearings and internally
protected against overload conditions.
REFRIGERANT COMPONENTS
1. Compressors:
A. Shall be fully hermetic type, direct drive, internally
protected with internal high-pressure relief and over
temperature protection. The hermetic motor shall be
suction gas cooled and have a voltage range of + or
- 10% of the unit nameplate voltage.