TC110 Series
Water Temperature Control Units 882.03888.00
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09/19/2018
33
4-9
Preventative Maintenance
Draining
Drain the unit thoroughly if you are taking it out of service for a long period of time, or you
expose it to freezing. Drain plugs are provided at the base of the heater tank and at the base
of the pump.
Periodic Checks
Every Six Months
Inspect all electrical connections for secure attachment and for safe and secure ground
connections. Inspect heater contactors for loose wire connections or large amounts of
carbon dust around contacts, as it may indicate the end of the life of the contactor. Inspect
the power cable, especially at the entrance point to the unit. A qualified electrician should
make this inspection. Check for leaks, especially under the pump, as it may indicate a worn
pump seal.
4-10
Corrective Maintenance
Pumps and Seals
Before leaving our factory, we test each unit extensively, then we calibrate each unit.
Afterwards, the unit is drained and blown out with air to remove water from piping systems.
If the unit is allowed to stand idle for a long time before being installed in your factory, the
housing gasket at the pump can dry out and can possibly leak when the unit is started. In
most cases these gaskets will soon swell and form a tight seal. In other cases, it may be
necessary for you to tighten the pump bolts to stop a leaking condition.
Pump seal surfaces can separate slightly because of rough handling or from vibration during
transit. This could cause a leak at the pump seal when the pump is started, but in most cases
the surfaces will mate again after the pump is allowed to run for a short period of time. If
they do not reseal, you may need to open the pump and free the seal by hand. It is seldom
necessary to install a replacement seal in a new unit unless the seal has been damaged
because the unit was started without water.
Our pump seals have a long period of service life. Some conditions, of course, can shorten
seal life, including the presence of grit, operation of the unit without water, sustained high
water temperature, or presence of certain chemicals in the water. Our pump seal assembly
has been developed to resist abrasive particles that are present in many water systems. This
