Carrier Chillers 30XA

Check all electrical connections, tighten as necessary.

Inspect all contactors and relays, replace as necessary.

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 psi (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 cooler heater operation, if equipped.

Check condenser coils for debris

Clean condenser coils as necessary following recommended guidelines

Check moisture indicating sight glass for possible refrigerant loss

Check moisture indicating sight glass for presence of moisture

Every 3 months (for all machines):

Check all refrigerant joints and valves for refrigerant leaks

Repair refrigerant leaks as necessary

Check chilled water flow switch operation

Send Oil Sample Out for Analysis

Check Condition of Condenser Fan Blades

General Cleaning and Tightening Connections

Check Chilled Water Flow Switch Operation

General Tightening and Cleaning Connections

Is the new compressor installed correctly?

Tighten fitting to 110 lb-ft (149 N-m) if a leak is detected

Is the gasket surface clean and undamaged?

Ensure oil level is 3/4 to 7/8 full in the sight glass

System Burnout Cleanup Procedure

IMPORTANT: Obtain replacement gasket before opening EXV. Do not re-use gaskets.

Enter the type of new gasket used

Is the lead screw in the fully closed position?

Enter the torque applied to the motor (in ft-lb)

Did you tighten the valve another 30 degrees?

Is there a sign of moisture in the system?

Sign off on the EXV Motor Replacement