Replace Liquid Line Valve on a McQuay Air Cooled Chiller

Replace Liquid Line Valve on a McQuay Air Cooled Chiller

Job Description:  Replace Liquid Line Valve on a McQuay Air Cooled Chiller

Area: Cheapside, London

Issue Identified:  Following a recent planned preventative maintenance visit on a McQuay Air Cooled Chiller, our engineer found the liquid line valve was leaking refrigerant and therefore required replacing.

Works carried out:

  • Isolated the McQuay Chiller unit electrically and mechanically.
  • Recovered refrigerant into certified cylinder for storage on site.
  • Weighed and confirmed the charge.
  • Removed the old expansion valve from the liquid line and installed a new expansion valve.
  • Fitted lifting magnets to the solenoid valves.
  • Pressure tested with OFN (oxygen free nitrogen) to locate any possible leak.
  • Once proved released OFN (oxygen free nitrogen) to atmosphere and evacuated system to a minimum of 2 Torr.
  • Re-charged with recovered refrigerant and trim charged with virgin refrigerant.
  • Test ran and commissioned.
  • Completed waste transfer note and handed to on-site representative.
  • Completed F Gas records.

ACES Group Can Also Supply and Install New Chillers – Call Us On 01865 890996

McQuay  Chillers

ACES service and maintain all McQuay  Chillers including Air Cooled Chillers and Water Cooled Chillers. These can be found in Data Centres, Hospitals, Hotels, Offices and Process Cooling. We have engineers based in London 24/7 available to respond within 1 to 2 hours for emergency call outs.

Some of the many McQuay Chillers we support
  • McQuay Air-cooled Screw Chiller
  • McQuay Magnetic Bearing Oil-free Air-cooled Chiller
  • McQuay Water-cooled Centrifugal Chiller
  • McQuay Water-cooled Screw Chiller
  • McQuay Magnetic Bearing Oil-free Water-cooled Chiller
  • McQuay McQuay Air Handling Unit
Abbreviations

HVAC – Heating, Ventiliation and Air Conditioning, PLT – Pressure Leak Test,  PRV – Pressure Relief Valve, PPM – Planned Preventative Maintenance, OFN – Oxygen Free Nitrogen, AHU – Air Handling Unit, GWP – Global Warming Potential, VRF – Variable Refrigerant Flow, VRV – Variable Refrigerant Volume, ACU – Air Conditioning Unit, FCU – Fan Coil Unit, AC – Air Conditioning,  HP – High Pressure, LP – Low Pressure, BMS – Building Management System