ICU CONDENSING UNIT INSTALLATION MANUAL
September2003:E\Manuals\Others\Qualitair\ICC\0412118
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8. REFRIGERATION COMMISSIONING Cont
8.2
Pressure Sensing Fan Speed Controller
This is factory set and should not require any adjustment.
8.3
Description of Operation (FSC)
The fan speed controller regulates the speed of the air cooled condenser fan motor for the general
purpose of cooling the unit by phase control, and keeps a definite condensing pressure to ensure
stability.
WARNING
Before adjusting be sure to TURN OFF THE POWER SUPPLY.
Adjustment Method
1.
Range adjustment
The set value 1.9Mpa (19bar) increases when turning the adjusting screw clockwise (CW) and it
decreases when turning the adjusting screw counter clockwise (CCW).
NOTE:
TEMPERATURE SENSING FAN SPEED CONTROLLER ONLY.
TO RUN FAN SPEED CONTROLLER AT MINIMUM SPEED DISCONNECT ONLY ONE OF THE
SENSOR LEADS
TO RUN FAN SPEED CONTROLLER AT MAXIMUM SPEED DISCONNECT BOTH SENSOR LEADS
AND LINK OUT THE TWO TERMINALS.
