5-2
Section 5 Preventive Maintenance
Cole Palmer
The safety features for high temperature protection and low liquid level
protection must be checked at regular intervals. The frequency depends on
the unit’s designated application and the heat transfer uid used.
High temperature protection
Set a cut-off temperature that is lower than the desired setpoint
temperature.
Switch on the circulator and ensure the unit shuts down at the set cut-off
temperature.
If the unit does not shut down have the unit checked by a qualied
technician.
Acrylic unit’s maximum high temperature setting should be limited
to the temperature indicated on the label on the front of the bath,
80°C.
Low liquid level protection
With the unit on, slowly drain the bath uid (use a drainage tap if
necessary) and ensure the unit shuts down.
If not, have the unit checked by qualied a technician.
Testing the Safety
Features
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