Thermolator TW Series UGH025-0504
5-2 MAINTENANCE
PREVENTATIVE
MAINTENANCE
SCHEDULE FOR
TW-1 AND TW-2
Thermolator TW Series water temperature controllers are
essentially maintenance-free. However, to maintain the best
performance, we recommend the following maintenance
schedule.
l Whenever process variables change
r
Perform an Auto Tune.
The Auto Tune ensures that the control continues to
obtain good approximations of the PID constants used
to compensate for the thermal lag of the system. You
should perform an Auto Tune after the first two hours of
operation and whenever the process changes, such as
after a mold change; installation of different pipe sizes;
or change in process setpoint. See Performing an Auto
Tune, Section 4.
l Daily
r
Check for leaks in cooling and process lines.
Before and during operation, you should inspect the
unit and all plumbing lines for leaks. If a leak develops,
stop the Thermolator and repair it.
r
Keep the unit and the area around it clean.
Check for and remove lint, dust or other obstructions on
the unit, especially around air intake areas. Keep the
floor around the unit dry.
r
Check the process fluid level (IC models).
Isolated circuit models have an internal reservoir that
contains the process fluid. Check the level indicator on
the back of the unit to make sure the reservoir contains
an adequate amount of process fluid. Refill as needed.
l Monthly, or as often as needed.
r
Inspect the fluid reservoir (IC models only).
Check the level switches in the process fluid reservoir
for debris or deposits that could interfere with proper
operation. Flush and clean the reservoir, if necessary.
l Quarterly (every 3 months)
r
Inspect power cords, wires and electrical
connections.
Check for loose or frayed wires, burned contacts, and
signs of overheated wires. Check exterior power cords
to the main power source and from the electrical box to
the pump and heating elements. Check the ground wire
and thermocouple connections. Replace any wire that
appears damaged or has worn or cracked insulation.
NOTE: There is no
Auto-tune for the JCI
control.
Continued
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