Specifications

Guide Specifications

APC NetworkAIR™ AFX 29

B. CABINET CONSTRUCTION

1. The cabinet and frame shall be bolt together formed sheet steel. Access panels shall be

flush with the frame and insulated with fiberglass 1 in. (25 mm) in thickness, 1.5 lb/ft

(24.0 kg/m

) in density. The panels shall be powder coated and lift off for access to the

unit. A piping and electrical access plate shall be provided in the bottom of the unit. All

units shall require front service access, 24 in (610 mm) minimum.

C. FAN/MOTOR SECTION

1. The unit shall be configured for draw-through air pattern, to provide uniform air-flow over

the entire face of the coil. The blower shall be double-inlet centrifugal type, with forward-

curving blades, dynamically and statically balanced. Each blower shall be independently

driven by a high-efficiency motor. The drive package shall be designed for 200% of the

fan motor horsepower. Minimum bearing life shall be 200,000 L

hrs. The motor and

blower shall be mounted on a common frame.

D. REFRIGERATION SYSTEM AND COMPRESSOR

1. Each refrigeration system shall consist of a fully protected scroll compressor, evaporator

coil mounted over an insulated stainless steel condensate pan, adjustable expansion valve,

filter-drier, liquid line solenoid valve, sight glass, receiver, liquid line isolation valve, low

pressure switch and manual reset high pressure switch.

E. MAIN POWER DISCONNECT

1. A non-automatic main power circuit breaker shall disconnect all high voltage power to the

unit if necessary. The disconnect switch shall be accessible without removing the electric

box cover.

F. ELECTRICAL PANEL

1. The electrical system shall conform to National Electrical Code (NEC) requirements. The

control voltage shall be 24 VAC, wired in accordance with NEC Class 1 requirements. The

wire for the control circuit shall not be smaller than 18-gauge AWG. Each wire shall end

with a service loop and be securely fastened by an approved method. Control wires more

than 6 in. (150 mm) shall be color-coded or numbered every 3 in. (80 mm) for ease of

service tracing. All electrically-actuated components shall be easily accessible from the

front of the unit. Each high voltage unit shall be individually protected on all three phases.

Main power shall be connected to a circuit breaker mounted on the electrical panel. The

compressor and motor shall have overload and short circuit protection. The electrical box

shall include all components and controls required for system operation. An emergency

cool override manual switch shall be provided with provision for control using a field

supplied thermostat. Incoming power is _________ V, _________ phase, 60 Hz.