APC AFX Series Specifications download pdf (Page 6)

2APC NetworkAIR™ AFX

Standard Features

Cabinet

The frame is constructed of heavy

gauge steel for maximum strength.

Steel access panels are insulated for

quieter operation. The unit has been

designed for full service access

from the front. The flush mounted

panels are removable using conve-

nient quarter-turn fasteners. The

access doors for the electronic con-

troller and electrical panel can be

opened without interrupting the

operation of the unit.

Evaporator Coil/Drain Pan

AFX utilizes dual distributors on

one circuit of the refrigeration sys-

tem. During dehumidification the

smaller distributor is turned off,

effectively reducing the active cir-

cuits of the evaporator coil. During

this mode of operation the evaporat-

ing temperature is decreased,

resulting in a lower coil surface

temperature. This decreases the

sensible heat ratio of the coil allow-

ing a greater percentage of moisture

removal. Additionally, the warmer

air leaving the inactive circuits of

the evaporator coil blends with the

near saturated air from the active

circuits raising the dry bulb temper-

ature of the blended air well above

saturation. Evaporator is a “V”coil,

1/2” rifled, copper tube, with raised,

lanced, rippled, aluminum fins.

Condensate pan is constructed of

stainless steel.

Humidifier

The humidifier utilizes a pure steam

generator specifically designed for

hi-tech area environmental control.

Pure steam eliminates contaminat-

ing mineral deposits, bacteria, white

dust and excessive humidity. Auto-

matic flushing combined with an

indicator that signals when the can-

ister is to be change changed,

ensure maintenance free operation.

Electrical Panel

The electrical panel contains the

contactors, starters, overload pro-

tection devices, and input power

disconnects. Each wire (except

jumpers) is numbered every 3”

(80mm), or color coded to facilitate

circuit tracing when installing and

servicing the unit. Each AC power

circuit is individually branch circuit

fused on all three phases. All com-

pressor and motor devices are

thermally and short circuit pro-

tected. The electrical panel is easily

accessible from the front of the unit.

An emergency cool override switch

can be manually activated to initiate

cooling and a field wired thermostat

can be utilized to control cooling

operation. Electrical components

are UL-listed and -recognized and

all wiring conforms to NFPA 70

(NEC) and UL 1995 requirements.

Air Filter

The filtration of conditioned air is

extremely vital to maintaining the

clean, particle-free environment

required by electrical equipment.

The system uses 30% efficient (100

microns) (ASHRAE 52.1-92), 4”

(102 mm) deep filters, with full

depth pleats. Deeper filters produce

a lower pressure drop, requiring

less energy during normal opera-

tion. Filters are replaceable through

the front of the upflow unit and the

top of the downflow unit.

Electric Reheat

A three-phase electrical resistance

heater sized to offset the sensible

cooling capacity in the dehumidifi-

cation mode is incorporated in each

NetworkAIR AFX. The reheat ele-

ments are low watt density sheathed

components. The reheat is 3- phase

to provide even phase loading.

Reheat elements are electrically and

thermally protected. The AFX18 is

one stage and AFX65 is two stages.

Fan/Motor Section

The NetworkAIR AFX includes

centrifugal blower assemblies that

have been engineered for quiet, reli-

able operation. Lower blower

speeds reduce noise and extend belt

and bearing life to 200,000L

hours. Permanently lubricated bear-

ings, a single-belt variable pitch

drive, and an adjustable motor base

all ensure dependable operation. In

addition, the return air is evenly dis-

tributed across the cooling coil.

Main Power Disconnect

A nonautomatic main power circuit

breaker disconnects all high voltage

power to the unit. The disconnect

switch is accessible without remov-

ing the electric box cover.

Refrigeration System and

Compressor

The refrigeration system operates

under an automatic microprocessor

controller for greater efficiency and

accuracy. The heavy-duty compres-

sor is designed for year-round

operation with a 15-year life

expectancy. Performance of the

refrigeration system is enhanced by

use of Scroll Compressor Technol-

ogy. Vibration in the system is

greatly reduced by eliminating

reciprocating masses found in the

semi-hermetic compressor. Risk of

refrigeration leaks at compressor

gaskets are eliminated with the

compressors’ fully welded hermetic

shell. The design of the scroll is

more tolerant to liquid flood back

than the traditional reciprocating

compressor. Power consumption at

full load is greatly reduced with

higher EER’s of the scroll. In addi-

tion reliability is enhanced due to

the fewer moving parts required

using scroll technology. The end

result is a refrigeration system that

offers the user optimized perfor-

mance, efficiency, and reliability.

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APC AFX Series Specifications Page 6

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