Replacement of Liquid Level Valve on Uniflair Chiller
Job Description: Replacement of Liquid Level Valve on Uniflair Chiller
Area: Overton Mill, Basingstoke
Issue Identified: Following a recent attendance, we quoted to replace the failed liquid level control valve and the faulty entering water temperature sensor
Works carried out:
- Decanted 220kg R134a refrigerant from the Uniflair Chiller into cylinders.
- Replaced EEV #1 and wired back to comp I/O board.
- Pressure tested system to 10bar.
- Found leak on LLS2 housing sight glass.
- Valved off LLS and replaced O-ring and Loctite sight glass.
- Reopened valves and carried out 24hr pressure drop test.
- No drop witnessed – all okay
- Blew down OFN (oxygen free nitrogen) and placed on vacuum.
- Evacuated to 750 microns over weekend.
- Carried out 1 hour rise test which passed ok.
- Recharged with reclaimed r134a 220kg and topped up with 90kg virgin.
- Recommissioned system.
- Left chiller on lead with 7.5’c LWT set point.
- Replaced return water sensor now reading correctly.
- Cleared site and completed all F Gas paperwork.