Bryant 602A - Manual (Page 27)

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GUIDE SPECIFICATIONS
Packaged Heat Pumps
Constant Volume Application
HVAC Guide Specifications
Size Range: 2 to 5 Tons, Nominal Cooling
Bryant Model Number: 602A
Part 1—General
SYSTEM DESCRIPTION
Outdoor packaged air to air heat pump unit utilizing a her-
metic compressor for cooling duty and optional electric
heating. Unit shall discharge supply air vertically or horizon-
tally as shown on contract drawings. Outdoor fan/coil sec-
tion shall have a draw-thru design with vertical discharge for
minimum sound levels.
QUALITY ASSURANCE
A. Unit shall be rated in accordance with ARI Standards 210/
240-94 and 270-95.
B. Unit shall be designed in accordance with UL Standard
1995.
C. Unit shall be manufactured in a facility registered to ISO
9001 manufacturing quality standard.
D. Unit shall be UL listed and c-UL certified as a total package
for safety requirements.
E. Roof curb shall be designed to conform to NRCA Stan-
dards.
F. Insulation and adhesives shall meet NFPA 90A require-
ments for flame spread and smoke generation.
G. Cabinet insulation shall meet ASHRAE Standard 62P.
DELIVERY, STORAGE AND HANDLING
Unit shall be stored and handled per manufacturer’s rec-
ommendations.
Part 2 — Products
EQUIPMENT
A. General:
Factory-assembled, single-piece, heat pump unit. Con-
tained within the enclosure shall be all factory wiring, pip-
ing, controls, refrigerant charge (R-22), and special
features required prior to field start-up.
B. Unit Cabinet:
1. Unit cabinet shall be constructed of phosphated, zinc-
coated, pre-painted steel capable of withstanding 500
hours of salt spray.
2. Normal service shall be through a single removable
cabinet panel.
3. The unit shall be constructed on a rust proof unit base
that has an externally trapped, integrated sloped drain.
4. Indoor fan compartment top surface shall be insulated
with a minimum 1/2-in. thick, flexible fiberglass insula-
tion, coated on the air side and retained by adhesive
and mechanical means. The indoor wall sections will
be insulated with a minimum semi-rigid foil-faced board
capable of being wiped clean. Aluminum foil-faced fi-
berglass insulation shall be used in the entire indoor air
cavity section.
5. Unit shall have a field-supplied condensate trap.
6. Metal Insulated Duct Covers for side discharge will be
standard on all sizes.
7. Unit Insulation conforms to ASHRAE 62P.
C. Fans:
1. The indoor fan shall be 3-speed, direct-drive, as shown
on equipment drawings.
2. Fan wheel shall be made from steel and shall be dou-
ble-inlet type with forward curved blades with corrosion
resistant finish. Fan wheel shall be dynamically bal-
anced.
3. Outdoor fan shall be direct drive propeller type with alu-
minum blades riveted to corrosion resistant steel spi-
ders, be dynamically balanced, and discharge air
vertically.
D. Compressor:
1. Fully hermetic compressors with factory-installed vibra-
tion isolation.
2. Scroll compressors shall be standard on all units.
3. Compressor Protection:
Defrost control shall protect compressor by preventing
“short cycling.”
E. Coils:
Indoor and outdoor coils shall have aluminum plate fins
mechanically bonded to seamless copper tubes with all
joints brazed. (Copper/copper and vinyl-coated construc-
tion available as option.) Tube sheet openings shall be
belled to prevent tube wear.
F. Refrigerant Metering Device:
Refrigerant metering device shall be of the fixed orifice
feed type.
G. Filters:
Filter section shall consist of field-installed, throwaway, 1-
in. thick fiberglass filters of commercially available sizes.
H. Controls and Safeties:
1. Unit controls shall be complete with a self-contained,
low voltage control circuit.
2. Units shall incorporate an internal compressor protec-
tor that provides reset capability.
I. Operating Characteristics:
1. Unit shall be capable of starting and running at 125°F
ambient outdoor temperature per maximum load crite-
ria of ARI Standard 240-94.
2. Compressor with standard controls shall be capable
of operation down to 40°F ambient outdoor tempera-
ture in cooling mode.
3. Unit shall be provided with 60-second fan time delay af-
ter the thermostat is satisfied.
J. Electrical Requirements:
All unit power wiring shall enter the unit cabinet at a single
location.
K. Motors:
1. Compressor motors shall be of the refrigerant-cooled
type with line-break thermal and current overload pro-
tection.
2. All fan motors shall have permanently lubricated bear-
ings, and inherent, automatic reset, thermal overload
protection.
3. Condenser fan motor shall be totally enclosed.
L. Special Features Available:
1. Grille:
Wire grille shall be standard on all units. Louvered grille
shall be available as a factory-installed option to pro-
vide hail guard and vandalism protection.
2. Coil Options:
Shall include factory-installed optional copper/cop-
per and vinyl-coated refrigerant coils.