Bryant 549C manual Guide Specifications 548F036-120, Part 1 General, Part 2 Products

GUIDE SPECIFICATIONS — 548F036-120

PACKAGED ROOFTOP AIR-TO-AIR HEAT PUMP WITH ELECTRIC HEAT OPTION — CONSTANT VOLUME APPLICATION

HVAC GUIDE SPECIFICATIONS

SIZE RANGE: 3 TO 10 TONS, NOMINAL (COOLING) 34,400 TO 105,000 BTUH,

NOMINAL (HEATING)

4 TO 50 kW NOMINAL (ELECTRIC HEATING) BRYANT MODEL NUMBER: 548F

PART 1 — GENERAL

1.01SYSTEM DESCRIPTION

Outdoor rooftop-mounted or slab-mounted, electrically controlled air-to-air heat pump utilizing a hermetic com- pressor for heating and cooling duty. Unit shall discharge supply air vertically or horizontally as shown on contract drawings.

1.02QUALITY ASSURANCE

A.Unit shall be rated in accordance with ARI Standards 210/ 240 and 270.

B.Unit shall be designed to conform to ASHRAE 15, latest revision, and in accordance with UL 1995.

C.Unit shall be UL tested and certified in accordance with ANSI Z21.47 Standard and UL listed and certified under Canadian Standards as a total package for safety requirements.

D.Roof curb shall be designed to conform to NRCA Standards.

E.Insulation and adhesive shall meet NFPA 90A require- ments for flame spread and smoke generation.

F.Unit casing shall be capable of withstanding Federal Test Method Standard No. 141 (Method 6061) 500-hour salt spray test.

1.03 DELIVERY, STORAGE, AND HANDLING

Unit(s) shall be stored and handled per manufacturer’s recommendations.

PART 2 — PRODUCTS

2.01EQUIPMENT (STANDARD)

A.General:

Factory-assembled, single-piece, air-to-air heat pump. 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, bonderized and coated with a baked enamel finish on all externally exposed surfaces with primer coated internal panels.

2.Indoor fan cabinet interior shall be insulated with a minimum 1/2-in. thick flexible fiberglass insulation coated on the air side.

3.Cabinet panels shall be easily removable for servicing.

4.Holes shall be provided in the base rails for rigging shackles to facilitate overhead rigging, and forklift slots shall be provided to facilitate maneuvering.

5.Unit shall have a factory-installed, sloped conden- sate drain pan made of a non-corrosive material, providing a minimum 3/4-in. connection with both vertical and horizontal drains and shall comply with ASHRAE 62.

6.Unit shall have factory-installed filter access panel to provide filter access with tool-less removal.

7.Unit shall have standard thru-the-bottom power con- nection capability.

C.Fans:

1.Indoor blower shall be of the direct-driven or belt-driven, double inlet, forward-curved centrifugal type. Belt drive shall include an adjustable-pitch motor pulley.

2.Indoor blower shall be made from steel with a corro- sion-resistant finish and shall be dynamically balanced.

3.Bearings shall be of the sealed, permanently lubri- cated, ball-bearing type for longer life and lower maintenance.

4.Outdoor fan shall be of the direct-driven propeller type and shall discharge air vertically.

5.Outdoor fan shall have aluminum blades riveted to corrosion-resistant steel spiders and shall be dynam- ically balanced.

D.Compressor(s):

1.Fully hermetic type, internally protected.

2.Factory rubber shock-mounted and internally spring mounted for vibration isolation.

E.Coils:

1.Outdoor and indoor coils shall have aluminum plate fins mechanically bonded to enhanced copper tubes with all joints brazed.

2.Tube sheet openings shall be belled to prevent tube wear.

3.Indoor coil shall be of the face split design.

4.Coils:

a.Copper-fin coils shall be constructed of copper fins mechanically bonded to copper tubes and copper tube sheets. Galvanized steel tube sheets shall not be acceptable. A polymer strip shall pre- vent coil assembly from contacting the sheet metal coil pan to minimize potential for galvanic corrosion between coil and pan. All copper con- struction shall provide protection in moderate coastal environments.

b.E-Coated aluminum-fin coils shall have a flexible epoxy polymer coating uniformly applied to all coil surface areas without material bridging between fins. Coating process shall ensure complete coil encapsulation. Color shall be high gloss black with gloss — 60 deg of 65 to 90% per ASTM D523-89. Uniform dry film thickness from 0.8 to 1.2 mil on all surface areas including fin edges. Superior hardness characteristics of 2H per ASTM D3363-92A and cross-hatch adhesion of 4B-5B per ASTM D3359-93. Impact resistance shall be up to 160 in./lb (ASTM D2794-93). Humidity and water immersion resistance shall be up to minimum 1000 and 250 hours respectively (ASTM D2247-92 and ASTM D870-92). Corro- sion durability shall be confirmed through testing to be no less than 1000 hours salt spray per ASTM B117-90. Coil construction shall be alumi- num fins mechanically bonded to copper tubes.

548F

69