Sterlco Royal Series Compact Temperature Control Unit - Manual (Page 41)

Royal Series Water Temperature Control Units Page 41
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
Clean annually, more often if using high mineral content water
or on high service level units.
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 Sterling Parts Department.
6-3 Restoring the Controller to Factory Setup
If the preset parameters on the controller have been tampered with
and it no longer properly controls temperature, you can restore the
controller to factory setup parameters. For more information on
controller restoration, consult the enclosed controller owner’s
manual.
6-4 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.