Preventive Maintenance Checklist:AIR COOLED CHILLER (AIRSTACK) - Semi-Annual

• Site conducted

• Conducted on

  Date

• Prepared by

• Location

• Work Order Number

(T)ools, (S)afety Equipment and (M)aterials

• Mechanic's tool set. Refrigeration tools.

  Yes

  No

  N/A

• Rags and cleaning materials

  Yes

  No

  N/A

• Refrigerant leak tester

  Yes

  No

  N/A

• Replacement lamps

  Yes

  No

  N/A

• Ladder

  Yes

  No

  N/A

• Personal protective equipment (PPE) for handling refrigerants

  Yes

  No

  N/A

• Rags

  Yes

  No

  N/A

Safety Guidelines

• Schedule work with operating personnel

  Yes

  No

  N/A

• Follow site safety rules for lockout and tagout

  Yes

  No

  N/A

• Be very careful when climbing roof access ladders

  Yes

  No

  N/A

• Review and follow the manufacturer’s instructions

  Yes

  No

  N/A

• Follow safety and environmental rules for refrigerants

  Yes

  No

  N/A

• Don't vent refrigerants. Refrigerants must be recovered

  Yes

  No

  N/A

• Submit a work order if refrigerants need to be added

  Yes

  No

  N/A

• Report any problems you find

  Yes

  No

  N/A

• Record the results in the maintenance log

  Yes

  No

  N/A

Maintenance Procedures

• Review the Airstack Chiller daily log sheet. Perform trending and assess any needed corrective action

  Yes

  No

  N/A

• Visually check power connections

  Yes

  No

  N/A

• Visually check control power connections

  Yes

  No

  N/A

• Visually check contactors and relays for damage and evidence of overheating

  Yes

  No

  N/A

• Dry clean all electrical compartments

  Yes

  No

  N/A

• Check sensors, within 2% of actual temperatures or pressures

  Yes

  No

  N/A

• Visually check the panel breaker, power wire and EG transfer

  Yes

  No

  N/A

• Check crankcase heaters for proper operation

  Yes

  No

  N/A

• Check and cycle Free Cool operating controls if equipped

  Yes

  No

  N/A

• Perform a visual check for oil or leaks

  Yes

  No

  N/A

• Visually check brazed joints and condenser for oil or leaks

  Yes

  No

  N/A

• Visually check refrigerant safety relief valve for oil or leaks

  Yes

  No

  N/A

• Check operation of liquid line solenoid valves

  Yes

  No

  N/A

• Check and record ambient temperatures, water temperature, refrigerant superheat and subcooling

  Yes

  No

  N/A

• Check pressure transducers and high-low pressure switches

  Yes

  No

  N/A

• Inspect and tighten schraeder cores and caps

  Yes

  No

  N/A

• Check system refrigerant sight glass for leaks or moisture

  Yes

  No

  N/A

• Manually switch hydronic pumps from 1 to 2 or from 2 to 1

  Yes

  No

  N/A

• Check all water side valves for proper position

  Yes

  No

  N/A

• Clean basket strainers, switch strainer valve position

  Yes

  No

  N/A

• Switch lead/lag switch on pumps

  Yes

  No

  N/A

• Check pump motor end bells for debris

  Yes

  No

  N/A

• Check pump seals for leakage

  Yes

  No

  N/A

• Power wash the inside of the pump cabinet

  Yes

  No

  N/A

• Power wash all outer surfaces with suitable cleaner

  Yes

  No

  N/A

• Water hose rinse all outer surfaces

  Yes

  No

  N/A

• Clean condenser coils with fresh water

  Yes

  No

  N/A

• Check insulation surfaces for integrity, condensate leaks

  Yes

  No

  N/A

• Perform a visual check for system water leaks

  Yes

  No

  N/A

• Check condenser fan shrouds, mounting and blades

  Yes

  No

  N/A

• Check fan hub clearance to motor

  Yes

  No

  N/A

• Remove debris and broom clean chiller area

  Yes

  No

  N/A

Maintenance Hours

• Estimated time spent on work order?