AquaForce® Variable Speed Air-Cooled Screw Chiller 30XV: Annual Maintenance

Every 12 months

• Check refrigerant charge.

• Check all electrical connections; tighten as necessary.

• Inspect all contactors and relays; replace as necessary.

• Change oil filters year 1, then as needed.

• Check accuracy of thermistors; replace if greater than ±2° F (1.2° C) variance from calibrated thermometer.

• Check accuracy of transducers; replace if greater than ±5 psig (34.47 kPa) variance.

• Check to be sure that the proper concentration of antifreeze is present in the chilled water loop, if applicable.

• Verify that the chilled water loop is properly treated.

• Check refrigerant filter driers for excessive pressure drop; replace as necessary.

• Check chilled water strainers, clean as necessary.

• Check evaporator heater operation.

• Check oil heater operation.

• Check condition of condenser fan blades and that they are securely fastened to the motor shaft.

• Perform Service Test to confirm operation of all components.

• Check for excessive evaporator approach (Leaving Chilled Water Temperature – Saturated Suction Temperature) which may indicate fouling. Clean evaporator vessel if necessary.

• Obtain oil analysis; change as necessary.