Specifications

3
Standard Features
Overall cabinet
The frame is constructed of heavy gauge steel
for maximum strength. The unit has been
designed for full service access from the front.
The flush mounted panels are removable using
quarter-turn fasteners.
Blower Assembly
The AFX series includes multiple, centrifugal
blower assemblies that have been engineered
for quite, reliable operation. Lower blower
speeds reduce noise and extend belt and
bearing life to 200,000L
10
. Permanently
lubricated bearings, a single-belt variable pitch
drive, and an adjustable motor base insure
dependable operation. 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 disconnects. 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 breaker protected on all three
phases. All compressor and motor devices are
thermally and short circuit protected. Electrical
panel is easily accessible from the front of the
unit. 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. 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
The refrigeration system consists of a single
hermetic compressor, externally equalized
expansion valve, filter-dryer, high pressure
switch, refrigerant sight glass, and moisture
indicator.
Cooling coil
Utilizes dual distributors on one circuit of the
refrigeration system. During dehumidification,
the smaller distributor is turned off, effectively
reducing the active circuits of the evaporator coil
resulting in a decreased SHR of the coil and
greater percentage of moisture removal.
Air filter
The AFX series uses 30% efficient 4" deep
filters, with full depth filter pleats. Filters are
easily replaced from the top on downflow units
and from the front on upflow units.
Airflow sensor
Upon detection of a loss of air flow the
microprocessor will deactivate: cooling, heating,
humidification, and dehumidification. After the air
flow has been restored for a predetermined
period of time, the microprocessor will reactivate
functions as needed.
Clogged filter alarm
An adjustable air pressure differential switch
senses the pressure drop across the filters.
Upon sensing an excessive pressure drop, the
switch activates the alarm circuit of the
microprocessor and displays a clogged filter
message simultaneously with an audible signal.
Emergency drain pan
Systems are provided with two drain pans. A
threaded flange is factory supplied for secondary
drain connections.