T9901018-1
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USER INSTRUCTIONS FOR THE DRY COOLING SYSTEM
For manual control using the Siemens RDG400 Manual Room Control
To Switch On and Off:
Make sure the On/Off Switch adjacent to the Thermoscreens dry cooling unit is
switched on. When it is switched on the fans in the dry cooling unit will operate
continuously.
The display screen on the manual room control will be indicating the air temperature in
large numerals.
Rotate the knob on the room control either clockwise or anti-clockwise and the numerals
will change and indicate the target (set-point) temperature as you rotate the knob.
Set this target temperature to the temperature required, say, 24°C.
The numerals will then flash this target temperature 5 times and go back to showing the
air temperature.
If the target temperature is lower than the air temperature the outdoor unit and the water
pump(s) will start to operate.
NB.
If the outdoor unit has just been operating it will be necessary to wait several
minutes before it will restart again to provide chilled water.
Control of the room temperature will now be fully automatic and the dry cooling system
should be left to do its job. Fans will run continuously in the Thermoscreens dry cooling
unit and the outdoor unit and water pump(s) will automatically cut in and out to control
the room temperature.
If the On/Off Switch adjacent to the dry cooling unit is switched off the fans will turn off
and the outdoor unit and water pump(s) will not operate.
Siemens RDG400
Manual Room Control
Air Temperature
Knob
Target Temperature
(when flashing)
