Asset: Carrier Chiller 30RB0302
Area: Mark Lane, London
Issue Identified: Following a recent maintenance on site the engineer found some issues with the chiller. There was a lot of corrosion on the coils, oil deposits were found around the discharge valves and the expansion valves. Both circuits had failed crankcase heaters.
Works carried out:
- Isolated the unit electrically and mechanically.
- Recovered the refrigerant into a dedicated recovery cylinder.
- Replaced the crankcase heaters.
- Pressure tested with OFN (oxygen free nitrogen) to locate leak.
- Repaired leak by means of brazing over of a pipe only.
- Re-Pressure tested with OFN (oxygen free nitrogen) to prove system was leak tight.
- Once proved released OFN to atmosphere and evacuated system to a minimum of 2 Torr.
- Re-charged with virgin refrigerant.
- Test ran and re-commissioned
- Replaced compressor fuses.
- Replaced mains isolator.
- Repeated for other circuit.
- Completed waste transfer note and handed to on-site representative.
- Completed F Gas certificate.
