al
09-08-2009, 09:51 PM
I'm looking at an r22 ducted unit, tripping on high discharge pressure, on start up gets to 30b, if left running drops to 24b, condenser clean and both fans running flat out. Unit drawing 8.5a, nominal rating is 7a,(3 phase).
Found faulty bypass solenoid from discharge to liquid line, removed gas and replaced, same symptoms.
suction into unit is 5c(5.2b),Liquid line temp out of condenser is:33c(24b), liquid pressure from service valve is 8b,
Suction out of 4 way valve is also 5c(if this was passing would this be higher?), discharge temp is 90+, i reckon it's a blockage but before i pull and replace every component in the line would anyone have a more scientific explanation??
i've seen mention of a strainer out of the condenser but can't find its location, i reckon it's got to be on the outdoor as if it were further downstream it would just pump down?
Changing unit to heating leaves pressures the same.
thanks
al
Found faulty bypass solenoid from discharge to liquid line, removed gas and replaced, same symptoms.
suction into unit is 5c(5.2b),Liquid line temp out of condenser is:33c(24b), liquid pressure from service valve is 8b,
Suction out of 4 way valve is also 5c(if this was passing would this be higher?), discharge temp is 90+, i reckon it's a blockage but before i pull and replace every component in the line would anyone have a more scientific explanation??
i've seen mention of a strainer out of the condenser but can't find its location, i reckon it's got to be on the outdoor as if it were further downstream it would just pump down?
Changing unit to heating leaves pressures the same.
thanks
al