Manufacturing / Industrial • Inspections

Heatcraft Low Temp Screw Compressor (Unit Coolers): Quarterly Maintenance

This procedure is for the quarterly inspection and maintenance of your condensing units. This will help you look for signs of oil stains on interconnection piping and condenser oil. Regular HVAC maintenance is said to reduce the risk of costly breakdowns by as much as 95%.Preventive maintenance helps ensure that your HVAC system runs at close to peak efficiency.

MaintainX

09/14/2022

Heatcraft Low Temp Screw Compressor (Unit Coolers): Quarterly Maintenance

Visually inspect unit

Look for signs of oil stains on interconnection piping and condenser coil. Pay close attention to areas around solder joints, building penetrations and pipe clamps. Check any suspect areas with an electronic leak detector. Repair any leaks found and add refrigerant as needed.
Check condition of moisture indicator/sightglass in the sight glass if so equipped. Replace liquid line drier if there is indication of slight presence of moisture. Replace refrigerant, oil and drier if moisture concentration is indicated to be high.
Check moisture indicator/sightglass for flash gas. If found check entire system for refrigerant leaks and add refrigerant as needed after repairing any leaks.
Check compressor sightglass (if equipped) for proper oil level.
Check condition of condenser. Look for accumulation of dirt and debris (clean as required).
Check for unusual noise or vibration. Take corrective action as required.
Inspect wiring for signs of wear or discoloration and repair if needed.
Check and tighten all flare connections.

Source: MaintainX (Community Member)

Visually inspect unit

Look for signs of oil stains on interconnection piping and condenser coil. Pay close attention to areas around solder joints, building penetrations and pipe clamps. Check any suspect areas with an electronic leak detector. Repair any leaks found and add refrigerant as needed.

Check condition of moisture indicator/sightglass in the sight glass if so equipped. Replace liquid line drier if there is indication of slight presence of moisture. Replace refrigerant, oil and drier if moisture concentration is indicated to be high.

Check moisture indicator/sightglass for flash gas. If found check entire system for refrigerant leaks and add refrigerant as needed after repairing any leaks.

Check compressor sightglass (if equipped) for proper oil level.

Check condition of condenser. Look for accumulation of dirt and debris (clean as required).

Check for unusual noise or vibration. Take corrective action as required.

Inspect wiring for signs of wear or discoloration and repair if needed.

Check and tighten all flare connections.