Sterlco SEU Series Economical Water TCU - Manual (Page 35)

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WTR1-605 Chapter 6: Maintenance
If the pump motor wiring is disconnected for removal from the unit,
make sure that you check the actual rotation direction
when the motor is rewired to the unit.
A phase sensor does not always indicate proper rotation
if motor wire leads are reversed at installation.
Consult the elementary wiring diagram for more information.
Heaters
Heaters may need to be cleaned chemically or mechanically to remove deposits and dirt that
reduce heat transfer and cause hot spots. Hot spots cause premature heater failure. Install a
new gasket when reassembling. Make sure a qualified electrician disconnects and reconnects
heater wires.
Solenoid Valves
þ Clean annually, more often if using high mineral content water or on high
service level units.
þ Sluggish operation, excessive leakage, and/or noise indicate cleaning is
necessary. Inspect the components for excessive wear while the valve is
disassembled.
Rebuild kits are available from the ACS Group Parts Department.
Electrical Connections
Make sure that a qualified electrician inspects all electrical components and connections
every six (6) months for secure attachment and ground connections. Inspect all wiring for
fraying or damage, especially power lines where they enter the unit. All wiring connections
must be tight.
6-3 Safety Devices
Make sure that only qualified electricians test safety devices!
Safety devices should be tested for function every six (6) months. Perform the following
procedures for testing: