Bryant Guide Specifications - Sizes, 558F/551B036-150, PART 1 - GENERAL, PART 2 - PRODUCTS

GUIDE SPECIFICATIONS — SIZES 036-150

558F/551B036-150

PACKAGED ROOFTOP COOLING UNIT WITH ELECTRIC HEAT OPTION — CONSTANT VOLUME APPLICATION

HVAC GUIDE SPECIFICATIONS

SIZE RANGE: 3 to 121/2 TONS, NOMINAL COOLING

BRYANT MODEL NUMBER: 558F, 551B

PART 1 — GENERAL

1.01SYSTEM DESCRIPTION

Outdoor rooftop- or slab-mounted, electrically controlled cooling unit with optional heat utilizing either reciprocating (558F) or scroll compressors for cooling duty and electric resistance coils for heating duty. Unit shall discharge sup- ply 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.

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 exceeding Federal Test Method Standard No. 141 (Method 6061) 500-Hour Salt Spray Test.

G.Each unit is subjected to completely automated run test- ing on the assembly line. Each unit contains a factory- supplied printout indicating tested pressures, amperages, data, and inspectors; providing certification of the unit status at the time of manufacture.

1.03 DELIVERY, STORAGE, AND HANDLING

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 (evaporator fan) shall be of the belt- driven, double inlet, forward-curved centrifugal type. Belt drive shall include an adjustable-pitch motor pulley (558F072-150, 551B036-150).

2.Indoor blower (evaporator fan) shall be made from steel with a corrosion-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.Condenser fan shall be of the direct-driven propeller type and shall discharge air vertically.

5.Condenser fan shall have blades riveted to corrosion- resistant steel spiders and shall be dynamically balanced.

6.Condenser-fan motor shall be totally enclosed.

D.Compressor(s):

1.Scroll type (reciprocating type, 558F), internally protected.

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

3.On independent circuits (090-150).

E.Coils:

1.Evaporator and condenser 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.

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

PART 2 — PRODUCTS

2.01EQUIPMENT (STANDARD)

A.General:

Factory-assembled, single-piece cooling unit with optional heat. 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, and have primer- coated interior panel surfaces.

2.Evaporator 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

3.Evaporator coil shall be of the face-split design (090-150).

F.Refrigerant Components:

Refrigerant circuit components shall include:

1.Fixed orifice metering feed system.

2.Refrigerant filter drier.

3.Service gage connections on suction, discharge, and liquid lines.

4.Ability to route gage hoses through unit top cover or outdoor panel.

G.Filter Section:

1.Standard filter section shall consist of factory- installed low-velocity, throwaway 2-in. thick fiberglass filters of commercially available sizes.

2.Filter face velocity shall not exceed 320 fpm at nomi- nal airflows.

3.Filter section shall use only one size filter.

4.Filters shall be accessible through an access panel with “no-tool” removal.

H.Controls and Safeties:

1.Unit Controls:

Unit shall be complete with self-contained low-volt- age control circuit protected by a fuse on the 24-v transformer side.

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