Bryant manual Guide Specifications 549B036-120, 549C024-060, Part 1 General

GUIDE SPECIFICATIONS — 549B036-120, 549C024-060

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

HVAC GUIDE SPECIFICATIONS

SIZE RANGE: 2 TO 10 TONS, NOMINAL (COOLING) 34,800 TO 114,000 BTUH, NOMINAL (HEATING)

4 TO 50 kW NOMINAL (ELECTRIC HEATING)

BRYANT MODEL NUMBER: 549B 549C

PART 1 — GENERAL

1.01SYSTEM DESCRIPTION

Outdoor rooftop mounted, electrically controlled air-to-air heat pump unit utilizing a scroll compressor for cooling duty and electric resistance coils for heating 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 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. 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 provided upon request.

1.03DELIVERY, STORAGE, AND HANDLING

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

PART 2 — PRODUCTS

2.01EQUIPMENT (STANDARD) A. General:

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 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 power con- nection capability (accessory kit is required).

C.Fans:

1.Indoor 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.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.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 (090-120).

E.Coils:

1.Standard indoor and outdoor coils shall have copper or aluminum plate fins mechanically bonded to seamless internally grooved copper tubes with all joints brazed.

2.Testing:

549B, 549C

Factory assembled, single-piece heat pump unit.	a. Indoor and outdoor coils shall be qualified to UL
Contained within the unit enclosure shall be all factory	1995 burst test at 2,200 psi.
wiring, piping, controls, refrigerant charge (R-22), and	b. Indoor and outdoor coils shall be leak tested to
special features required prior to field start-up.
	150 psig and pressure tested to 400 psig.

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