Liebert DS Refrigeration Piping, Water-Cooled Condensers, Compressor Section, Electrical Panel

HVAC Maintenance Checklist

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/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

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

Controls

___ 1. Check/Verify Control Operation (Sequence)

___ 2. Check humidifier high water alarm operation

___ 3. Check operation of the air safety switch

___ 4. Check setting/operation of the filter clog switch

___ 5. Check/test changeover device(s)

___ 6. Check/test water detection device(s)

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