AEC Econo-Cool Chillers - Manual (Page 57)

Page 56 AEC Water Temperature Control Units
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CAUTION
HAZARDOUS ELECTRICAL CURRENT PRESENT.
Maintain a safe ground and disconnect the power
supply before servicing the unit.
Make sure a qualified electrician makes electrical
connections; disonnect/lock out electricity using OSHA
20CFR 1910.147 standards when servicing the unit.
To adjust the pressure switch:
„ Using a small, flat-blade screwdriver, carefully remove the plug at the top
of the switch.
Figure 9
Pressure Switch
Side View and Top View
Under the plug is a Phillips-head adjusting screw:
„ Turn the screw counterclockwise to reduce the pressure.
- or -
„ Turn the screw clockwise to increase the pressure.
A quarter turn (90º rotation) approximates 15 psi (103.4 kPa/
1.0 bars).
„ Replace the plug on the top of the switch.
If the plug gets damaged, the switch is still sealed internally.
Phillips head screw