microKool Portable Chillers
UGH004/0999
To maintain the best performance, we recommend the follow- ing maintenance schedule.
● Whenever process variables change ❒ 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 in the OPERATION section.
● Weekly, or as often as needed
❒ 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.
❒ 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 CLEANING
EVAPORATORS AND CONDENSERS.
❒ 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 REFILLING THE TANK.
● Monthly, or as often as needed.
❒ Check the refrigerant charge.
A sight glass located between the condenser and evaporator indicates refrigerant pressure. See
CHECKING REFRIGERANT CHARGE.
❒ 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.
❒ 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.
