Danfoss KPU Series Installation Manual page 4

Adjustment
C
D
E
A: HP Range adjusting screw
B: Cover screw
C: LP Differential adjusting screw
D: Locking plate
E: LP Range adjusting screw
Low Pressure Side Setting
Cut Out on pressure fall.
Scale plate directly indicates the Cut In
and the Differential set points.
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1. Turn the range screw to adjust the Cut In set point.
2. Then turn the differential screw to adjust the Differential
3. The Cut Out setting equals the Cut In less the Differential:
CUT OUT = CUT IN - DIFFERENTIAL
NOTE:
Cut Out set point must be above absolute vacuum!
If the Differential is set too high then the switch will
not stop the compressor.
4 | 520H11521 | DKRCC.PI.CD0.C6.02
A
B
2
Before adjustment, loosen the locking plate.
For setting use the Universal Refrigeration Wrench.
Set Cut In/ Cut Out by adjusting range screw:
– On LP Side turn the range screw clockwise to lower the Cut In.
– On HP Side turn the range screw clockwise to rise the Cut Out.
Set differential by adjusting differential screw:
– On LP Side turn the differential screw clockwise to increase the
differential.
NOTE:
Adjust the pressure switch with settings specified by the
manufacturer of the controlled equipment.
Do not exceed the pressure ratings of the controlled
equipment or any of its components when checking
pressure switch operation or operating the controlled
equipment.
Do not adjust pointers beyond the highest or lowest
indicator marks on the scale plate, as this may cause
inaccurate swich operation.
IMPORTANT:
The scale plate is only for reference and for more
precise setting a pressure gauge should be used.
IMPORTANT:
After installing and adjusting pressure switch run the
controlled equipment several times (at least three
cycles) at normal operating conditions.
High Pressure Side Setting
Cut Out on pressure rise.
Scale plate directly indicates the Cut Out set point.
There is no pointer for the Differential.
The Differential pressure value is fixed and printed on the scale
plate.
1. Turn the range screw to adjust the Cut Out set point.
2. The Cut In setting equals the Cut Out less the Differential:
CUT IN = CUT OUT - 60 psi
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© Danfoss | DCS (jmn) | 2017.01