Bryant manual GUIDE SPECIFICATIONS Ð 580D036-150, Hvac Guide Specifications, Part 1 Ð General

GUIDE SPECIFICATIONS Ð 580D036-150

PACKAGED ROOFTOP ELECTRIC COOLING UNIT WITH GAS HEAT Ð CONSTANT VOLUME APPLICATION

HVAC GUIDE SPECIFICATIONS

SIZE RANGE: 3 to 121¤2 TONS, NOMINAL (COOLING) 72,000 TO 250,000 BTUH, NOMINAL (INPUT HEATING)

MODEL NUMBER: 580D

Part 1 Ð General

1.01SYSTEM 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.

1.02QUALITY ASSURANCE

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

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

C.Unit shall be UL-tested and certi®ed in accordance with ANSI Z21.47 Standards and UL listed and certi®ed 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 ¯ame 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, and shall be manufactured in a facility registered to ISO 9002/ BS5750, Part 2.

H.Each 580D unit is subjected to completely automated run testing on the assembly line. Each unit contains a factory- supplied printout indicating tested pressures, amperages, data, and inspectors; providing certi®cation 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 Ð Products

2.01EQUIPMENT (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 ®eld start-up.

B.Unit Cabinet:

1.Unit cabinet shall be constructed of galvanized steel, and shall be bonderized and coated with a prepainted baked enamel ®nish on all externally exposed surfaces.

2.Evaporator fan compartment interior cabinet surfaces shall be insulated with a minimum 1¤2-in. thick, ¯exible ®berglass insulation, coated on the air side. Aluminum foil-faced ®berglass 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 rig- ging.

5.Unit shall have a factory-installed, sloped condensate 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 Standard 62.

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

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

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 lubri- cated ball-bearing type for longer life and lower maintenance.

2.Evaporator fan shall be made from steel with a corrosion-resistant ®nish and shall be dynamically balanced.

3.Condenser fan shall be of the direct-driven propeller type and shall discharge air vertically.

4.Condenser fan shall have aluminum blades riveted to corrosion-resistant steel spiders and shall be dy- namically balanced.

5.Induced-draft blower shall be of the direct-driven, single inlet, forward-curved centrifugal type, made from steel with a corrosion-resistant ®nish and shall be dynamically balanced.

D.Compressor(s):

1.Fully hermetic type, internally protected.

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

3.On independent mounting circuits (090-150).

E.Coils:

1.Evaporator and condenser coils shall have aluminum plate ®ns mechanically bonded to copper tubes with all joints brazed.

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

3.Evaporator coil shall be of the face-split design which proves effective in removing additional moisture from the supply air.

F.Heating Section:

1.Induced-draft combustion type with energy saving direct-spark ignition system and redundant main gas valve.

2.The heat exchanger shall be of the tubular-section type constructed of a minimum of 20-gage steel coated with a nominal 1.2 mil aluminum-silicone alloy for corrosion resistance.

3.Burners shall be of the in-shot type constructed of aluminum-coated steel.

4.All gas piping shall enter the unit cabinet at a single location.

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