R1976
12-07-2010, 11:11 PM
Evening all,
I am having teething problems with a 5 degree room:eek:.
I have Profoid Quietis WPH13C outdoor and Friga-Bohn TA2R8P evaporator with Alco TI(E) expansion valve and size 1 orifice. Room measures approx 4x5m.
System runs and runs but will only achieve 10 degrees. I have charged 3.5Kg of R404A and pipes are 1/2" and 3/8" about 8m long, sight glass is full.
I have observed the following:-
Suction pressure = 70psi
Liquid pressure = 250psi
Evap air on/off = 10/7 degrees
Condenser air on/off = 17/32 degrees
Liquid before expansion valve = 32 degrees
Pipe temp after expansion valve = 4 degrees
suction temp after evap = 3-7 degrees
As you can see the evaporating pressure seems high and there is not a great deal of difference across the evap. I have been medling with the expansion valve and it doesn't seem to help, although I was messing with it afew days before.
I am thinking the expansion valve is faulty, it is new so is this possible?
Am I barking up the wrong tree?
Any help appreciated, I have to get this room right.
I am having teething problems with a 5 degree room:eek:.
I have Profoid Quietis WPH13C outdoor and Friga-Bohn TA2R8P evaporator with Alco TI(E) expansion valve and size 1 orifice. Room measures approx 4x5m.
System runs and runs but will only achieve 10 degrees. I have charged 3.5Kg of R404A and pipes are 1/2" and 3/8" about 8m long, sight glass is full.
I have observed the following:-
Suction pressure = 70psi
Liquid pressure = 250psi
Evap air on/off = 10/7 degrees
Condenser air on/off = 17/32 degrees
Liquid before expansion valve = 32 degrees
Pipe temp after expansion valve = 4 degrees
suction temp after evap = 3-7 degrees
As you can see the evaporating pressure seems high and there is not a great deal of difference across the evap. I have been medling with the expansion valve and it doesn't seem to help, although I was messing with it afew days before.
I am thinking the expansion valve is faulty, it is new so is this possible?
Am I barking up the wrong tree?
Any help appreciated, I have to get this room right.