User manual

HVAC Maintenance Checklist
153 Liebert
®
DS
™
Condensate Pump
___ 1. Check for debris in sump
___ 2. Check operation of float(s) (free movement)
Refrigeration Piping
___ 1. Check refrigerant lines (clamps secure/no rubbing/no leaks)
___ 2. Check for moisture (sight glass)
Water-Cooled Condensers
___ 1. Check water regulating valve operation
___ 2. Cap tubes (not rubbing)
___ 3. Check for water/glycol leaks
___ 4. Entering water temperature ______________ °
___ 5. Leaving water
Drain Piping
___ 1. Check for free running drain system
___ 2. Clear out obstructions and material buildup on tubing walls
___ 3. Check for leaks
___ 4. Check for tubing kinks or damage
Compressor Section
___ 1. Check oil level
___ 2. Check for oil leaks
___ 3. Check compressor mounts (springs/bushings)
___ 4. Cap tubes (not rubbing)
___ 5. Check wire connections (inside compressor box)
___ 6. Compressor operation (vibration/noise)
___ 7. Suction Pressure Circuit #1 __________________ Circuit #2 ______________________
___ 8. Discharge Pressure Circuit #1 __________________ Circuit #2 ______________________
___ 9. Superheat Circuit #1 __________________ Circuit #2 ______________________
___ 10. Low pressure switch cut out Circuit #1 ______________Circuit #2 __________________
___ 11. Low pressure cut in Circuit #1 ______________Circuit #2 __________________
___ 12. High pressure cut out Circuit #1 ______________Circuit #2 __________________
___ 13. Amp draw
____ Circuit #1
___ a. L1 L2 L3
____ Circuit #2
___ a. L1 L2 L3
Electrical Panel
___ 1. Check fuses
___ 2. Check contactors for pitting
___ 3. Check wire connections