Hussmann arl サービスマニュアル

This control is designed for
conservation of energy by
reducing power consumption of
glass door frame assemblies.
This is achieved by controlling
the average power applied to
the door glass anti-condensate
heaters. Power to the heaters is
cycled in proportion to the
sensed dew point relative to the
surface temperature of the door
glass. Required heat load is
anticipated thus ensuring no
condensation forms on the door
glass will occur (see Table 1).

The control consists of three
components: a control module
located in the raceway, a com-
bination temperature and %RH
sensor mounted in the door
mullion and an interconnecting
cable. All three components are
factory installed in the frame
assembly. Unlike other similar
control systems, sensor place-
ment is not a concern of the
installer. Exact location and
position of the sensor required
for optimal performance is
achieved at the factory. As this
device is integral to the frame
assembly, there is no esthetic
impact to the shopper.

The glass anti-condensate
heaters are under the control of
a microprocessor in the control
module. The processor continu-
ously monitors the environment
surrounding the glass surface
and adjusts the % of on time to
the heaters accordingly. This
eliminates the need for operator
adjustment and guarantees
maximum energy savings at all
possible room ambient condi-
tions. The control algorithm
detects product loading as well
as peak shopping and adjusts
applied heat to optimize clear-
ing time. 

The control switches a maxi-
mum load of 5 amps. This
allows the control to be applied
to one to five door frame
assemblies. Each frame assem-
bly will be equipped with its
own control/sensor.

P/N 2402799_A

HUSSMANN CORPORATION • BRIDGETON, MO  63044-2483  U.S.A. • WWW.HUSSMANN.COM

Operating Ambient: –20 to +100 deg F
Input Voltage: 100 to 250 VAC