Bryant 582A User Manual download pdf (Page 23)

GUIDE SPECIFICATIONS

PACKAGED HEATING/COOLING UNITS

CONSTANT VOLUME APPLICATION

HVAC GUIDE SPECIFICATIONS

SIZE RANGE: 1

TO 5 TONS, NOMINAL COOLING

40,000 TO 130,000 BTUH,

NOMINAL HEATING INPUT

BRYANT MODEL NUMBER: 582A

PART 1 — GENERAL

SYSTEM DESCRIPTION

Outdoor rooftop mounted or ground level installed, gas

heating/electric cooling unit utilizing a hermetic compres-

sor for cooling duty. Unit shall discharge supply air verti-

cally or horizontally as shown on contract drawings.

Condenser fan/coil section shall have a draw-thru design

with vertical discharge for minimum sound levels.

QUALITY ASSURANCE

A. Unit shall be rated in accordance with ARI Standards

210-89 and 270-89.

B. Unit shall be designed in accordance with UL Standard

1995.

C. Unit shall be manufactured in a facility registered to

ISO 9001 manufacturing quality standard.

D. Unit shall be UL listed and CSA certified as a total pack-

age for safety requirements.

E. Roof curb shall be designed to conform to NRCA

Standards.

F. Insulation and adhesives shall meet NFPA 90A require-

ments for flame spread and smoke generation.

G. Cabinet insulation shall meet ASHRAE Standard 62P.

DELIVERY, STORAGE AND HANDLING

Unit shall be stored and handled per manufacturer’s

recommendations.

PART 2 — PRODUCTS

EQUIPMENT

A. General:

Factory-assembled, single-piece, heating and cooling

unit. Contained within the 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 phosphated, zinc-

coated, pre-painted steel capable of withstanding

500 hours in salt spray.

2. Normal service shall be through a single removable

cabinet panel.

3. The unit shall be constructed on a rust proof basepan

that has an externally trapped, integrated sloped drain

pan.

4. Evaporator fan compartment top surface shall be insu-

lated with a minimum

-in. thick, flexible fiberglass in-

sulation, coated on the air side and retained by

adhesive and mechanical means. The evaporator wall

sections will be insulated with a minimum semi-rigid

foil-faced board capable of being wiped clean. Alumi-

num foil-faced fiberglass insulation shall be used in

the entire indoor air cavity section.

5. Unit shall have a field-supplied condensate trap.

C. Fans:

1. The evaporator fan shall be 3-speed, direct-drive, as

shown on equipment drawings.

2. Fan wheel shall be made from steel, be double-inlet

type with forward curved blades with corrosion resis-

tant finish and be dynamically balanced.

3. Condenser fan shall be direct drive propeller type with

aluminum blades riveted to corrosion resistant steel

spiders, be dynamically balanced, and discharge air

vertically.

D. Compressor:

1. Fully hermetic compressors with factory-installed vi-

bration isolation.

2. Reciprocating and/or scroll compressors shall be

standard on all units.

E. Coils:

Evaporator and condenser coils shall have aluminum

plate fins mechanically bonded to seamless copper tubes

with all joints brazed (copper/copper and vinyl-coated

construction available as factory-installed option). Tube

sheet openings shall be belled to prevent tube wear.

F. Heating Section:

1. Induced-draft combustion type with energy saving di-

rect spark ignition system and redundant main gas

valve.

2. Induced-draft motors shall be provided with solid-state

hall-effect

sensor to ensure adequate airflow for

combustion.

3. The heat exchangers shall be constructed of alumi-

nized steel for corrosion resistance.

4. Burners shall be of the in-shot type constructed of alu-

minum coated steel.

5. All gas piping and electric power shall enter the unit

cabinet at a single location.

G. Refrigerant Components:

Refrigerant components shall be of the fixed orifice feed

type.

H. Filter section shall consist of field-installed, throwaway,

1-in. thick fiberglass filters of commercially available

sizes.

I. Controls and Safeties:

1. Unit controls shall be complete with a self-contained

low voltage control circuit.

2. Safeties: Compressors shall incorporate a solid-state

compressor protector that provides reset capability.

J. Operating Characteristics:

1. Unit shall be capable of starting and running at 125°F

ambient outdoor temperature per maximum load crite-

ria of ARI Standard 210.

2. Compressor with standard controls shall be capable of

operation down to 55°F ambient outdoor temperature.

3. Units shall be provided with fan time delay to prevent

cold air delivery before the heat exchanger warms up.

4. Unit shall be provided with 30-second fan time delay

after the thermostat is satisfied.

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