Daikin Heat Pump Pressure Relief Valve Replacement
Job Description: Daikin Heat Pump Pressure Relief Valve Replacement
Area: Wandsworth Riverside, London
Issue Identified: Following maintenance on site the engineer advised that the PRV’s (pressure relief valves) on the chiller were out of date and required replacing. Chiller 2 circuit 1 had lost all its refrigerant and required a pressure leak test.
Works carried out:
- Isolated the unit electrically and mechanically.
- Isolated compressor and removed valves.
- Replaced the pressure relief valves.
- Charged the system with OFN (oxygen free nitrogen) to locate the leak circuit 1.
- Repaired the leak by means of tightening.
- Re-charged the unit with OFN (oxygen free nitrogen) to prove the circuit is leak tight.
- Once proved released OFN (oxygen free nitrogen) into atmosphere and evacuated system to a minimum of 2 Torr.
- Charged the circuit with virgin refrigerant.
- Test ran and re-commissioned.
- Completed waste transfer note and handed to on-site representative.
- Completed F Gas certificate.

Castel PRV’s
At ACES our specialist spares team work closely with Castel to offer key product stock and off the shelf solutions to meet your requirements. Working with the Rail, Supermarket and Service sectors we provide cost effect Castel solutions to match most alternative components. Castel’s product flexibility offers key sizing and rating comparisons allowing ‘like for like’ replacements of existing valve equipment. Castel are at the forefront of Pressure Relief Valve equipment offering PRV valves with a vast pressure range.
ACES Also Supply And Install Heat Pumps – 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