036-21359-001-B-0302
Unitary Products Group
15
MECHANICAL SPECIFICATIONS
GENERAL DESCRIPTION
Units shall be factory-assembled, single packaged,
(DCG Electric Cooling/Gas Heat, DCE Electric Cooling/
Optional Electric Heat), designed for outdoor mounted
installation. Units shall have minimum EER ratings of
8.5. They shall have built in field convertible duct con-
nections for down discharge supply/return or horizontal
discharge supply/return, and be available with factory
installed options or field installed accessories.
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.
Enclosed in each unit shall be a factory test log sheet
consisting of the unit tested pressures, temperatures
and amps, as tested prior to shipment.
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 ETL & CGA listed, classified to
ANSIZ21.47 standards, 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 750
hours salt spray test per ASTM-B117 standards.
2.
Indoor blower section shall be insulated with up to
1" thick insulation, coated on the air side. Alumi-
num foil faced insulation shall be used in the fur-
nace compartment and be fastened with ridged
fasteners to prevent insulation from entering the air
stream.
3.
Cabinet panels shall be “large” size, easily remov-
able for servicing and maintenance.
4.
Full perimeter base rails shall be provided to
assure reliable transit of equipment, overhead rig-
ging and proper sealing on roof curb applications.
5.
Disposable 2" filters shall be furnished and be
accessible through a removable access door,
sealed air tight. Units filter track shall be designed
to accommodate either 1" or 2" filters.
6.
Fan performance measuring ports shall be pro-
vided on the outside of the cabinet to allow accu-
rate
air
measurements
of
evaporator
fan
performance without removing panels or creating
air by-pass of the coils.
7.
Condensate pan shall be internally sloped and
conform to ASHARE 62-89 self-draining standards.
Condensate connection shall be a minimum of 1"
I.D. female and be a ridged mount connection.
8.
Unit shall incorporate a fixed outdoor air damper
with an outdoor air intake opening covered with a
bird screen and a rain hood painted to match the
exterior of the unit.
INDOOR (EVAPORATOR) FAN ASSEMBLY
1.
Fan shall be a belt drive assembly and include an
adjustable-pitch motor pulley. Job site selected
(B.H.P.) brake horse power shall not exceed the
motors nameplate horse power rating, plus the ser-
vice factor. Units shall be designed not to operate
above service factor.
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.
OUTDOOR (CONDENSER) FAN ASSEMBLY
1.
The outdoor fans shall be of the direct-driven pro-
peller type, discharge air vertically, have blades
riveted to corrosion resistant steel spider brackets
and shall be dynamically balanced for smooth
operation.
2.
The 2 outdoor fan motors shall be totally enclosed
with permanently lubricated bearings, internally
protected against overload conditions and staged
independently.
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.
B.
Shall have internal spring isolation and sound muf-
fling to minimize vibration and noise, and be exter-
nally
isolated
on
a
dedicated,
independent
mounting.
2
Coils:
A.
Evaporator and condenser coils shall have alumi-
num plate fins mechanically bonded to seamless
internally-enhanced copper tubes with all joints
brazed. Special Phenolic coating shall be available
as a factory option.
Summary of Contents for D2CE
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