Bryant 549C manual Guide Specifications 542J150,180, General

GUIDE SPECIFICATIONS — 542J150,180

542J

PACKAGED ROOFTOP AIR-TO-AIR HEAT PUMP — CONSTANT VOLUME APPLICATION

HVAC GUIDE SPECIFICATIONS

SIZE RANGE: 13 AND 15 TONS, NOMINAL (COOLING) 136,000 TO 172,000 BTUH, NOMINAL (HEATING)

19 TO 50 kW NOMINAL (ELECTRIC HEATING)

BRYANT MODEL NUMBER: 542J

PART 1 — GENERAL

1.01SYSTEM DESCRIPTION

Outdoor rooftop mounted, electrically controlled air-to-air heat pump unit utilizing reciprocating, semi-hermetic compressor(s) for cooling duty and electric resistance coils for heating duty. Unit shall discharge supply air vertically or horizontally (with horizontal supply/return adapter assem- bly or roof curb) as shown on contract drawings.

1.02QUALITY ASSURANCE

A.Unit shall be rated in accordance with ARI Standards 210/ 240 or 360 and 270. Designed in accordance with UL Standard 1995. Units shall be Energy Star qualified.

B.Unit shall be designed to conform to ASHRAE 15, latest revision.

C.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.

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 500-hour salt spray exposure per ASTM B117 (scribed specimen).

G. Unit shall be designed in accordance with ISO 9001:2000, and shall be manufactured in a facility registered to ISO 9001:2000.

H.Each unit shall be subjected to a completely automated run testing on the assembly line. Units contain a factory- supplied printout indicating tested pressures, amperages, data, and inspectors; providing certification of the unit sta- tus at the time of manufacture.

1.03DELIVERY, STORAGE, AND HANDLING

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

PART 2 — PRODUCTS

2.01EQUIPMENT (STANDARD)

A.General:

Factory assembled, single-piece heat pump unit. Con- tained 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.Indoor fan compartment interior cabinet surfaces shall be insulated with a minimum 1/2-in. thick, 1 lb. density, flexible fiberglass insulation, neoprene coated on the air side. Aluminum foil-faced fiberglass 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 3/4-in. 14 NPT connection with 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.Indoor Fan:

a.Fan shall be belt driven with an adjustable-pitch motor pulley. The standard fan drive shall have a factory-installed low-medium static pressure fan drive. The alternate fan drive option shall have a factory-installed high-static pressure fan drive.

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.

d.Bearings shall be pillow block type (180 only).

2.Indoor fan shall be made from steel with a corrosion- resistant finish and shall be dynamically balanced.

3.Outdoor fan shall be of the direct-driven (with totally enclosed motors) propeller type and shall discharge air vertically.

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

D.Compressor(s):

1.Reciprocating semi-hermetic compressors with factory-installed crankcase heaters.

2.Factory mounted on rubber grommets and internally spring mounted for vibration isolation.

3.On independent circuits (180).

4.The size 150 unit semi-hermetic compressor shall be equipped with an electric unloader for capacity control.

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