pie man
28-01-2011, 11:43 PM
Hello fellow engineers,
I was hoping someone might be able to help me on a refrigeration fault.
I've got a problem multi-deck which contains two evaps which are piped up to one condensing unit. The right hand side gets down to setpoint of 0 degrees, however the left hand side runs between 5-8 degrees. If I turn the right hand side coil off, the left hand coil will get down to setpoint which again is 0 degrees.
This HT case is on R404A, contains mercury controllers and network modules. It runs at 1.8 bar L/P either one coil is in demand or both, however pressure will drop down to 0.5 bar for a while then go back to 1.8 bar :confused:. The H/P runs at 10 bar which seems normal and the sight glass is clear.
This case was only installed last August and has had several engineers investigate this fault already. I would be grateful if anyone could suggest any ideas on what could be causing the fault.
Kind regards,
Pie Man
I was hoping someone might be able to help me on a refrigeration fault.
I've got a problem multi-deck which contains two evaps which are piped up to one condensing unit. The right hand side gets down to setpoint of 0 degrees, however the left hand side runs between 5-8 degrees. If I turn the right hand side coil off, the left hand coil will get down to setpoint which again is 0 degrees.
This HT case is on R404A, contains mercury controllers and network modules. It runs at 1.8 bar L/P either one coil is in demand or both, however pressure will drop down to 0.5 bar for a while then go back to 1.8 bar :confused:. The H/P runs at 10 bar which seems normal and the sight glass is clear.
This case was only installed last August and has had several engineers investigate this fault already. I would be grateful if anyone could suggest any ideas on what could be causing the fault.
Kind regards,
Pie Man