Emerson Liebert Chiller Pressure Leak Test

Emerson Liebert Chiller Pressure Leak Test

Job Description:  Emerson Liebert Chiller Pressure Leak Test

Area: Data Centre, Hounslow

Issue Identified:  Following a recent attendance to site our engineer advised that the Emerson Liebert Chiller unit required a pressure leak test.

Works carried out:

  • Isolated the Emerson Liebert unit electrically and mechanically.
  • Recovered refrigerant into certified cylinder for storage on site.
  • Circuit one had no refrigerant.
  • Circuit two only had half of its charge.
  • Weighed and confirmed the charge.
  • Pressure tested with OFN (oxygen free nitrogen) to locate leak.
  • Leak found on evaporator coil and gas bypass on circuit one.
  • Leak found on PRV on circuit two.
  • Replaced PRV on circuit two.
  • Re-tested circuit two.
  • ACES Lift and Shift Team removed the failed coils from the chiller.
  • Installed new coil.
  • Charge the system with nitrogen to prove leak tight.
  • Once proved release OFN (oxygen free nitrogen) to atmosphere and evacuated system to a minimum of 2 Torr.
  • Recharged the system with recovered refrigerant and topped up with virgin refrigerant.
  • Test ran and re-commissioned.
  • Completed waste transfer note and handed to on-site representative.
  • Completed F Gas register.

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

Liebert Chillers have a wide range of models with capabilities for sustainable refrigerant options. These units are ideal for applications where temperature control is crucial. Liebert Chillers have been designed to bring efficient, reliable cooling to all types of large commercial applications. ACES engineers are experts in service and maintenance of all Liebert Chiller types. We have engineers based in London 24/7.

Some of the many Liebert Chillers we support
  • Liebert AFC, Adiabatic Freecooling Chillers
  • Liebert OFC – Oil-Free Centrifugal Chiller
  • Liebert HPC-S – Air-cooled, Freecooling and Adiabatic Freecooling Chillers
  • Liebert HPC-L and HPC-M, Freecooling Chillers
  • Liebert HPC-W, Water-Cooled Chillers
  • Liebert HPD – Dry Cooler
  • Liebert EFC, Evaporative Freecooling Solution
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