York Air Cooled Water Chiller Sensor Replacement
Job Description: York Air Cooled Water Chiller Sensor Replacement
Area: Bishopsgate, London
Issue Identified: Following a planned preventative maintenance visit, our engineer found the liquid gas sensor had failed therefore the sensor required to be replaced, we also needed to replace the pressure relief valves due to them being out of date.
Works carried out:
- Isolated the unit electrically and mechanically.
- Recovered refrigerant into certified cylinder for storage on site.
- Weighed and confirmed the charge.
- Replace Pressure Relief valves & Liquid level sensor
- Pressure tested with OFN (oxygen free nitrogen) to locate leak.
- Repaired any further leaks by means of brazing over or tightening.
- 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 York Chillers – Call Us On 01865 890996
Features and advantages of the York Chiller
The benefits of a York Chiller are reduced emissions, greater flexibility, more sustainable and better control. Designed for temperature sensitive operations such as data centres, manufacturing, and hospitals. ACES have a team of highly trained York specialist engineers. We offer a 24/7 service with most of our engineers based in London.

Some of the many York Chillers we support
- YCAL Scroll Chiller
- YLAA Scroll Chiller
- YVAA Variable Speed Drive Screw Chiller
- YVFA Free Cooling Variable Speed Screw Chiller
- YCIV Variable Speed Drive Screw Chiller
- YHAU-C Single Effect Steam Absorption Chiller
- YHAU-CW Double Effect Steam Fired Absorption Chiller
- YHAU-CG/CA-CXR Double Effect Direct Fired Chiller/Heaters
- YHAU-CG/CA Double Effect Direct Fired Chiller/Heaters
- YHAU-CL/CH Single Effect Hot Water Absorption Chiller
- YHAP-C Absorption Heat Pump
- YCUL Air-cooled Scroll Condensing Unit
- YLUA Air-cooled Scroll Condensing Unit
- YMC² Magnetic Bearing Centrifugal Chiller
- YZ Magnetic Bearing Centrifugal Chiller
- YK Centrifugal Chiller
- YVWA Variable Speed Screw Chiller
- YCWL Scroll Chiller
- YK-EP Centrifugal Chiller With Economizer
- YST Steam Turbine Centrifugal Chiller
- Titan OM Custom Design Centrifugal Chiller
- CYK Compound Centrifugal Chiller/Heat Pump
- YD Dual Centrifugal Chiller
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