Page 6 of 16
Drawing : - TPC572
Issue
: - 1
Date
: - 08/02/22
OPERATION
The CD425 is a self contained low temperature dehumidifier. All electrical
contactors, overloads, etc are housed in an electrical box built inside the unit.
The unit is equipped with a defrost valve which energized automatically to
clear any ice formation on the evaporator coils. This allows the unit to operate
at much lower temperatures; the control panel gives indication of the set
humidity, drying and defrost status.
TEST FOR CORRECT OPERATION
The following procedure should be followed to test the unit for correct
operation.
1. After unpacking connect the unit to a 220V 3PH 60 Hz power supply.
2. Switch the machine to the on position and check for correct fan
rotation. (Air blows out of the top of the machine).
3. Check dehumidification process:
a) Remove front cover
b) Check actual relative humidity inside the area
c) Set humidity control to a lower value than the actual relative
humidity as follows:
i. Press the UP and DOWN arrow keys together for 3
seconds and the display will start to flash
ii. Use the UP and DOWN arrow keys to adjust the set point
to 35% (Range is 35% - 99%)
iii. Press the RIGHT arrow key to save (if the RIGHT arrow
key is not pressed for 3 seconds the selection is
cancelled)
iv. Once set to 35% and saved the compressor will start and
the drying light illuminates.
d) After approximately 6 minutes check the compressor is running.
e) Leave the machine to run for 15 minutes. (NOTE: ensure that
the set humidity, see c) above, is set very low as the
compressor will switch off when the actual RH coincides with the
set point)
GREEN LENS
POWER ON
RED LENS
POWER OFF
BLUE LENS
DEFROST
YELLOW LENS
DEHUMIDIFYING
