Sterlco SEU Series Economical Water TCU - Manual (Page 36)

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WTR1-605 Chapter 6: Maintenance
Motor Overload
Disconnect main power. Open the electrical enclosure and rotate the manual TEST button on
the motor overload to the tripped position. Close the enclosure and reconnect main power.
Push the START button. The unit should not start and the Pump Overload indicator
should illuminate.
Press the RESET button. The unit is now ready for operation.
Pressure Switch
With the unit running, program a set point of 30ºF (-1ºC). Allow the process temperature to
drop under 100ºF (38ºC). When the process temperature reaches that point, turn off the water
supply. The pump should stop and the Low Water Pressure indicator should illuminate. Turn
the water supply on to reset the pressure switch.
Adjusting the Pressure Switch
The pressure switch used in your Economical Series water temperature control unit is factory
set at 16 psig (110.3 kPa/1.1 bars). However, if the process does not require the unit to
operate at 250ºF (121ºC), you can adjust the switch to meet your process needs.
Tools Required
• Small flat blade screwdriver
• #2 Phillips head screwdriver
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.