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APC NetworkAIR AFX Series: Standard Features 9
Blower assembly The AFX series includes multiple, centrifugal blower assemblies that have
been engineered for quiet, reliable operation. Lower blower speeds reduce
noise and extend belt and bearing life to 200,000L
10
hours. Permanently
lubricated bearings, a single-belt variable pitch drive, and an adjustable
motor base all ensure dependable operation. In addition, the air return
patterns evenly distribute air across the cooling coil.
Electrical panel The electrical panel contains the contactors, starters, overload protection
devices, and input power circuit breakers. Each wire (except jumpers) is
numbered every 3" (80 mm), or color coded to facilitate circuit tracing when
installing and servicing the unit. Each AC power circuit is individually
circuit-braker protected on all three phases. All compressor and motor
devices are thermally and short circuit protected. The electrical panel is
easily accessible from the front of the unit, and its modular construction
allows access to major components within the unit cabinet. An emergency
cool override switch can be manually activated to initiate cooling and a field
wired thermostat can be utilized to control cooling operation. All electrical
components are UL-listed and-recognized and all wiring conforms to NFPA
70 (NEC) and UL 1995 requirements.
Humidifier The humidifier utilizes a pure steam generator specifically designed for hi-
tech area environmental control. The pure steam eliminates contaminating
mineral deposits, potentially deadly bacteria, white dust and excessive
humidity. The humidifier requires little or no scheduled maintenance.
Automatic flushing combined with an indicator that signals when the canister
is to be changed, ensure maintenance free operation.
Electric reheat A three-phase electrical resistance heater sized to offset the sensible cooling
capacity in the dehumidification mode is incorporated in each AFX series
unit. The reheat elements are low watt density sheathed components. The
reheat is three phase to provide even phase loading. Reheat elements are
electrically and thermally protected.
Refrigeration system
and compressor
The refrigeration system operates under an automatic microprocessor
controller for greater efficiency and accuracy. The heavy-duty compressors
are designed for year-round operation with a 15-year life expectancy. The
performance of the refrigeration system is enhanced by use of Scroll
Compressor Technology. Scroll compressors offer many advantages over
older technology semi-hermetic compressors. Vibration in the system is
greatly reduced by elimination of the reciprocating masses found in the semi-
hermetic compressor. Risk of refrigeration leaks at compressor gaskets are
eliminated with the scroll 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 addition 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 performance, efficiency
and reliability.