Bryant 581A/B Product Information Manual page 139

PACKAGED ROOFTOP ELECTRIC COOLING UNIT WITH
GAS HEAT — CONSTANT VOLUME APPLICATION
HVAC GUIDE SPECIFICATIONS
SIZE RANGE: 3 TO 12 / TONS, NOMINAL (COOLING)
1
2
60,000 TO 250,000 BTUH, NOMINAL (INPUT HEATING)
BRYANT MODEL NUMBERS: 580F, 581B
581B036-121 UNITS ARE
ENERGY STAR QUALIFIED
PART 1 — GENERAL
1.01 SYSTEM DESCRIPTION
Outdoor rooftop mounted, electrically controlled heating
and cooling unit utilizing a hermetic compressor(s) for
cooling duty and gas combustion for heating duty. Unit
shall discharge supply air vertically or horizontally as
shown on contract drawings.
1.02 QUALITY ASSURANCE
A. Unit well exceeds ASHRAE 90.1-2001 Energy Standards.
Units 581B036-120 are Energy Star qualified.
B. Unit shall be rated in accordance with ARI Standards 210
or 360. Designed in accordance with UL Standard 1995.
C. Unit shall be designed to conform to ASHRAE 15, latest
revision.
D. Unit shall be UL-tested and certified in accordance with
ANSI Z21.47 Standards and UL-listed and certified
under Canadian standards as a total package for safety
requirements.
E. Roof curb shall be designed to conform to NRCA
Standards.
F. Insulation and adhesive shall meet NFPA 90A require-
ments for flame spread and smoke generation.
G. Unit casing shall be capable of withstanding 500-hour salt
spray exposure per ASTM B117 (scribed specimen).
H. Unit shall be designed in accordance with ISO
9001:2000, and shall be manufactured in a facility regis-
tered to ISO 9001:2000.
I. Each unit shall be subjected to a completely automated
run testing on the assembly line. A factory-supplied print-
out indicating tested pressures, amperages, data, and
inspectors; providing certification of the unit status at the
time of manufacture, shall be available upon request.
1.03 DELIVERY, STORAGE, AND HANDLING
Unit shall be stored and handled per manufacturer's
recommendations.
PART 2 — PRODUCTS
2.01 EQUIPMENT (STANDARD)
A. General:
Factory assembled, single-piece heating and cooling unit.
Contained within the unit enclosure shall be all factory
wiring, piping, controls, refrigerant charge (R-22), and
special features required prior to field start-up.
B. Unit Cabinet:
1. Unit cabinet shall be constructed of galvanized steel,
and shall be bonderized and coated with a pre-
painted baked enamel finish on all externally
exposed surfaces.
2. Evaporator fan compartment interior cabinet sur-
faces shall be insulated with a minimum
GUIDE SPECIFICATIONS — 580F036-151 AND 581B036-150
1 / -in. thick,
2
1 lb density, flexible fiberglass insulation, neoprene
coated on the air side. Aluminum foil-faced fiber-
glass insulation shall be used in the gas heat
compartment.
3. Cabinet panels shall be easily removable for
servicing.
4. Holes shall be provided in the base rails for rigging
shackles to facilitate maneuvering and overhead
rigging.
5. Unit shall have a factory-installed, sloped conden-
sate drain pan made of a non-corrosive material, pro-
viding a minimum
both vertical and horizontal drains, and shall comply
with ASHRAE Standard 62.
6. Unit shall have a factory-installed filter access panel
to provide filter access with tool-less removal.
7. Unit shall have standard thru-the-bottom gas and
power connection capability (accessory kit is
required).
C. Fans:
1. Evaporator Fan:
a. Fan shall be direct or belt driven as shown on the
equipment drawings. Belt drive shall include an
adjustable-pitch motor pulley.
b. Fan wheel shall be double-inlet type with forward-
curved blades.
c. Bearings shall be sealed, permanently lubricated
ball-bearing type for longer life and lower
maintenance.
2. Evaporator fan shall be made from steel with a corro-
sion-resistant finish and shall be dynamically
balanced.
3. Bryant rooftop evaporator fan motors smaller than
5 hp are specifically designed for Bryant and are
rated in maximum continuous Bhp or maximum con-
tinuous watts. The motors do not have a horsepower
rating on the nameplate.
4. Condenser fan shall be of the direct-driven (with
totally enclosed motors) propeller type and shall dis-
charge air vertically.
5. Condenser fan shall have aluminum blades riveted to
corrosion-resistant steel spiders and shall be dynam-
ically balanced.
6. Induced-draft blower shall be of the direct-driven, sin-
gle inlet, forward-curved centrifugal type, made from
steel with a corrosion-resistant finish and shall be
dynamically balanced.
D. Compressor(s):
1. Fully hermetic type, internally protected scroll-type.
2. Factory mounted on rubber grommets and internally
spring mounted for vibration isolation.
3. On dual electrically and mechanically independent
circuits (090-150).
E. Coils:
1. Standard evaporator and condenser coils shall have
aluminum lanced plate fins mechanically bonded to
seamless internally grooved
with all joints brazed.
2. Dual compressor models (size 090-150) shall have
face-split type evaporator coil (circuit no. 1 on
bottom).
139
3 / -in.-14 NPT connection with
4
3 / -in. OD copper tubes
8