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b. Switch on the system, and run for a few minutes to stabilise.
c. The head pressure should be approximately:
R407C: 275-280 psig (18.9-19.6barg)
to achieve this remove sealing plug and insert 2mm or 5/64”
allen key into setting screw. Turn allen key clockwise (+) or counter clockwise (-) to readjust the setting.
Do not turn setting screw
more than 3 turns clockwise
(+3). Use following table as a quick guideline for
setting:
Pressure changes per turn of adjusting screw:
Pressure change 1: 4.0 … 12.5 bar:
Clockwise ~ +1,2 bar, counter clockwise ~ -1,2 bar
Pressure change 2: 9.2 … 21.2 bar:
Clockwise ~ +2,5 bar, counter clockwise ~ -2,5 bar
Pressure change 3: 12.4 … 28.4 bar:
Clockwise ~ +3,3 bar, counter clockwise ~ -3,3 bar
After adjustment, re-insert sealing plug and make sure that it is properly fitted. IP65 protection requires
firmly sealed plug
NOTES:
Tolerances for condensing temperatures setpoint: ±2K
Min fan speed (0 rpm) and fan cut in pressure 200 psig (13.8 barg) are factory set and not adjustable.
NOTE:
The condenser fan may stop if the operating pressure drops below 200 psig (13.8 barg)