Bespoke Chiller Repairs including Pressure Relief Valve Replacements

Bespoke Chiller Repairs including Pressure Relief Valve Replacements

Job Description: Bespoke Chiller Repairs including Pressure Relief Valve Replacements

Area: Southwark Street, London

Issue Identified: Following a recent maintenance on site, the engineer advised that circuits 2 and 3 were very low on refrigerant and required a Pressure Leak Test (PLT). The engineer also advised that the Pressure Relief Valves (PRV’s) required replacing as they were out of date.

Additional benefits are: Cost savings from completing the PRV replacements at the same time as the PLT (pressure leak test

Works carried out:

  • Isolated the unit electrically and mechanically.
  • Recovered any remaining refrigerant.
  • Weighed and confirmed the charge for circuits 2 and 3.
  • Replaced the Pressure Relief Valves.
  • Pressure tested with OFN (oxygen free nitrogen) to locate leak.
  • Repaired any further leak by brazing.
  • Once proved released OFN to atmosphere and evacuated the system to a minimum of 2 Torr.
  • Re-charged with recovered refrigerant, and trim charged with virgin.
  • Test ran and commissioned.
  • Completed waste transfer note and handed to on-site representative.
  • Completed F Gas records.
  • While on site, the dual port valves held for circuit 1 and 4, so we also replaced the PRV’s (pressure relief valves)on those circuits.

ACES Also Supply And Install New Chillers – Call Us For More Information 01865 890996

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

Ref: 1684