TC 120
682.98767.00 • 10/04/2018
39
6-4 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:
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.
Safety Thermostat
Disconnect main power. Open the electrical enclosure and disconnect the neutral lead
on the safety thermostat from the terminal strip. Protect the stripped lead to prevent
short circuits. Close the enclosure, reconnect main power, and push the
START
button. The heater should
not
turn on and the
Over Temperature
indicator should
illuminate.
Disconnect main power before reconnecting the thermostat lead
.
6-5 Cleaning and Storage
Inspect the unit daily for leaks
. Wipe down the unit periodically to remove dirt
and dust buildup, especially the motor casing.
Drain and flush the unit every six (6) months to remove sediment buildup.
Completely drain the unit and
carefully
blow out the piping with pressurized air
before placing the unit in storage.