Conair MPA User Manual
microKool Portable Chillers
UGH004/0999
5-2
M
AINTENANCE
P
REVENTATIVE
M
AINTENANCE
S
CHEDULE
To maintain the best performance, we recommend the follow-
ing maintenance schedule.
ing maintenance schedule.
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●
Whenever process variables change
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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
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
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●
Weekly, or as often as needed
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❒
Check for leaks in condenser and process lines.
Before and during operation, you should inspect the
unit and all plumbing lines for leaks. If a leak develops,
stop the chiller and repair it.
unit and all plumbing lines for leaks. If a leak develops,
stop the chiller and repair it.
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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. If you notice a decrease in
efficiency over time, check all heat transfer surfaces of
the evaporator and condenser for fouling. See
the unit, especially around air intake areas. Keep the
floor around the unit dry. If you notice a decrease in
efficiency over time, check all heat transfer surfaces of
the evaporator and condenser for fouling. See
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Check the process fluid level.
Check the level indicator on the back of the unit to
make sure the tank contains an adequate amount of
process fluid. Refill as needed. See
make sure the tank contains an adequate amount of
process fluid. Refill as needed. See
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Monthly, or as often as needed.
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Check the refrigerant charge.
A sight glass located between the condenser and
evaporator indicates refrigerant pressure. See
evaporator indicates refrigerant pressure. See
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Clean all external surfaces.
Surfaces fouled by dust, dirt, slime, minerals and other
contaminants will decrease performance. Wipe all
external surfaces, paying particular attention to heat
transfer surfaces. Clean the air-cooled condenser
surfaces if you find dirt or clogging.
contaminants will decrease performance. Wipe all
external surfaces, paying particular attention to heat
transfer surfaces. Clean the air-cooled condenser
surfaces if you find dirt or clogging.
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Check the water treatment system.
If you use a water treatment system for the water-cooled
condenser or the process fluid circuit, maintain the
proper chemical levels and follow the recommendations
of your water treatment specialist.
condenser or the process fluid circuit, maintain the
proper chemical levels and follow the recommendations
of your water treatment specialist.