Bryant EVOLUTION 577D----A Manual de usuario descargar pdf (Pagina 28)

GUIDE SPECIFICATIONS

SINGLE--PACKAGED AIR CONDITIONER AND GAS

FURNACE SYSTEM CONSTANT VOLUMEAPPLICATION

HVAC GUIDE SPECIFICATIONS

SIZE RANGE: 2 TO 5 TONS, NOMINAL (COOLING)

40,000 to 130,000 Btuh

Nominal Heating Input

MODEL NUMBER: 577D----A

PART I -- GENERAL

SYSTEM DESCRIPTION

Outdoor rooftop or ground mounted air conditioner and gas

furnace system utilizing a two--stage scroll compressor for cool-

ingduty. Unitshalldischarge supply airvertically orhorizontally

as shown on contract drawings. Outdoor 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 AHRI Standards

210/240, and 270.

B. Unit shall be designed in accordance with UL Standard

1995 and ANSI Z21.47.

C. Unit shall be manufactured in a facility registered to ISO

9001 manufacturing quality standard.

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

package for safety requirements.

E. Roof curb shall be designed to conform to NRCA

Standards.

F. Insulation and adhesives shall meet NFPA 90A

requirements 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 recommen-

dations.

PART 2-- PRODUCTS

EQUIPMENT

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--410A), and special fea-

tures required prior to field start--up.

B. Unit Cabinet:

1. Unit cabinet shall be constructed of phosphated, zinc--coated,

prepainted steel capable of withstanding 500 hrs of salt spray.

2. Normal service shall be through 3 removable cabinet panels.

3. The unit shall be constructed on a rust proof unit base thathas

an externally trapped, integrated sloped drain pan.

4. Indoor fan compartment top surface shall be insulated with a

minimum 1/2--in. (13 mm) thick, flexible fiberglass

insulation, coated on the airside and retained by adhesiveand

mechanical means. The indoor wall sections will be insulated

with a foil--faced insulation capable of being wiped clean.

Aluminum foil--faced fiberglass insulation shall be used in the

entire indoor air cavity seciton.

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

C. Fans:

1. The indoor fan shall be ECM Motor, as shown on equipment

drawings.

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

shall have forward--curved blades with a corrosion--resistant

finish and shall be dynamically balanced.

3. Outdoor fan shall be of the direct--driven propeller type with

aluminum blades, riveted to corrosion--resistant steel spiders.

Itshall be dynamically balanced, and discharge air vertically.

D. Compressor:

1. Fully hermetic 2--stage compressors with factory--installed

vibration isolation.

2. Two--stage scroll compressors shall be standard on all units.

E. Coils:

1. Indoor and outdoor coils shall have aluminum plate fins

mechanically bonded to seamless copper tubes with all joints

brazed.

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

F. Heating Section:

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

spark ignition system and redundant main gas valve.

2. Pressure switch ensures adequate airflow for combustion

from induced draft motor.

3. The heat exchangers shall be constructed of 409 stainless

steel for corrosion resistance.

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

aluminum coated steel.

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

at a single location.

G. Refrigerant Metering Device:

Refrigerant metering device shall be of the TXV

(thermostatic expansion valve) type.

H. Filters:

Filter section shall consist of field--installed, throw--away,

1--in. (25 mm) thick fiberglass filters of commercially

available sizes.

I. Controls and Safeties:

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

voltage control circuit.

2. Units shall incorporate an internal compressor protector that

provides reset capability.

3. Unit shall provide high and low/loss--of--charge pressure

safety protection.

J. Operating Characteristics:

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

(51.6_C) ambient outdoor temperature, ex

ceeding maximum

load criteria of AHRI Standard 210.

2. Unit shall be capable of low ambient cooling from 55°F

(12.7_C) down to 0°F (--17.7°C) ambient outdoor

temperature with low ambient cooling enabled on the UI

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

delivery before the heat exchanger warms up.

K. Electrical Requirements:

Allunitpowerwiring shall enter unitcabinet ata singlelocation.

L. Motors:

1. Compressor motors shall be of the refrigerant--cooled type

with line--break thermal and current overload protection.

2. All fan motors shall have permanently lubricated bearingsand

inherent automatic--reset thermal overload protection.

3. Outdoor fan motor shall be totally enclosed.

4. Evaporator fan motor to be ECM motor.

577D-- -- A

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Bryant EVOLUTION 577D----A Manual de usuario Pagina 28

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