Carrier 62E Manual do Utilizador descarregar pdf (Página 63)

Packaged Energy Recovery Ventilator

HVAC Guide Specifications

Size Range: 350 cfm to 25,000 cfm, Nominal

Carrier Model Numbers: 62E

Part 1 — General

1.01 SYSTEM DESCRIPTION

One-piece energy recovery ventilation (ERV) unit is

an electronically controlled ventilation air pre-

conditioner utilizing an AHRI 1060 certified energy

recovery cassette to reduce the cooling and heating

loads placed on the primary HVAC unit by untreated

outdoor air. Building exhaust air shall be introduced

to the ERV unit through ductwork or by a specially

designed transition connected to a Carrier rooftop

unit. Unit shall be designed to function as a stand-

alone ERV or may be used in conjunction with a

packaged HVAC unit.

1.02 QUALITY ASSURANCE

A. Unit shall be designed in accordance with UL Stan-

dard 1995 version 3.

B. Unit shall be ETL tested and certified.

C. Roof curb shall be designed to conform to NRCA

standards.

D. Insulation and adhesive shall meet NFPA 90A

requirements for flame spread and smoke

generation.

E. Unit casing shall be capable of withstanding ASTM

No. 141 (Method 6061) 500-hour salt spray test.

F. Unit shall be AHRI 1060 certified, latest edition.

Part 2 — Products

2.01 EQUIPMENT (Standard)

A. General:

The ERV unit shall be a factory assembled, single-

piece unit. Contained within the unit enclosure shall

be all factory wiring with a single, pre-determined

point of power input and a single point of 24-volt

control wiring.

B. Unit Cabinet:

1. Unit cabinet shall be constructed of galvanized

steel coated with a pre-painted baked enamel

finish.

2. Unit shall have hoods installed over outside air

intake and exhaust openings.

3. The cabinet shall be insulated on the tempered

side of the ERV with 1-in. insulation in a

double-walled compartment.

4. The exhaust airstream shall have a back draft

damper to prevent air penetration during off

cycles.

5. The ERV wheel shall be in a horizontal position

in the unit for vertical supply/return configura-

tion units (62EB-EU). The ERV wheel shall be

in a vertical position in the unit for horizontal

supply/return configuration units (62E2-E7).

6. Pressure test ports shall be factory-installed on

the outside of unit cabinet. They shall allow

measurement of ERV wheel pressure drop on

both the intake and exhaust sections to facilitate

blower setup and air balancing.

7. Eye-bolts are provided to facilitate rigging.

C. Blowers:

1. 62E cabinets (all except 62EB,E7 units):

Blowers shall be single-width, single-inlet back-

ward inclined blades with direct-drive motors.

Direct-drive motors shall be electronically com-

mutated (EC) motors with built-in variable fre-

quency drive. The blowers shall not use belts or

pulleys.

2. 62EB,E7 cabinets only:

Blowers shall be double-width, double-inlet type

with forward-curved blades and direct-drive

motors. Units shall have four-speed motors.

3. Blower wheel shall be made from steel with a

corrosion resistant finish and shall be a dynami-

cally balanced.

4. Blowers shall be mounted on neoprene vibra-

tion isolation pads.

5. Motors shall be high efficiency and have ther-

mal overload protection.

D. Filter Section:

Standard filter section shall accept commercially

available, 2-in. pleated filter(s).

E. Controls and Safeties:

1. The unit shall be microprocessor controlled.

2. The operator interface shall consist of a back-lit

LCD (liquid crystal diode) screen, pushbutton

and potentiometer. These are used to adjust air-

flows and control parameters and display oper-

ating airflows and alarms. No belts or pulleys

are adjusted to set airflows.

F. Electrical Requirements:

All unit power wiring shall enter unit cabinet at a sin-

gle location.

G. Energy Recovery Cassette:

1. Energy wheel performance shall be AHRI Stan-

dard 1060 certified and bear the AHRI certified

product seal.

2. The energy recovery cassette shall be a UL rec-

ognized component for electrical and fire

safety.

3. The wheel shall be coated with silica gel desic-

cant, permanently bonded without the use of

binders or adhesives.

4. Coated wheels shall be washable with detergent

or alkaline coil cleaner and water.

5. The silica gel shall not dissolve or deliquesce in

the presence of water or high humidity.

6. The substrate shall be made of a lightweight

polymer and shall not degrade or require

Guide specifications

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