Hi All
Came across a compressed air dryer today that fed hot gas after expansion valve and into suction line before expansion valve sensing bulb.
Outlet from bypass valve went to a tee, then it went through check valve, then connected before evap and after tev. This I am familiar with, but from tee it also went directly into suction line before sensing bulb.
I am aware you can have hot gas in suction line, with a de-superheating txv.
but why both?????
Unit is a ultratroc hpd4200. R134a
2 bar suction. Hot gas bleeding in.
11-8bar discharge. When fans cycling.
Full site glass. Evap outlet constant 1.5degrees
Comp suction return ranging between 3 and 15 degrees
I think this is happening when tev closes ant hot gas is going straight into suction line! Then hot gas warms sensing bulb then opens tev again! Constantly seeing temperature swing at comp inlet?
I cannot see why you need both?
Any help explaining this would be great
Troy
Came across a compressed air dryer today that fed hot gas after expansion valve and into suction line before expansion valve sensing bulb.
Outlet from bypass valve went to a tee, then it went through check valve, then connected before evap and after tev. This I am familiar with, but from tee it also went directly into suction line before sensing bulb.
I am aware you can have hot gas in suction line, with a de-superheating txv.
but why both?????
Unit is a ultratroc hpd4200. R134a
2 bar suction. Hot gas bleeding in.
11-8bar discharge. When fans cycling.
Full site glass. Evap outlet constant 1.5degrees
Comp suction return ranging between 3 and 15 degrees
I think this is happening when tev closes ant hot gas is going straight into suction line! Then hot gas warms sensing bulb then opens tev again! Constantly seeing temperature swing at comp inlet?
I cannot see why you need both?
Any help explaining this would be great
Troy