monkey spanners
23-06-2010, 08:52 PM
Got called to a DX milk tank on R22 but someone had previously changed the txv and fitted an R134a one....
I checked the standing pressure and looked it up on my trusty slide rule and it confirmed R22 pressures (so the refrigerant hadn't been changed too) so i chucked a new Tex2 and n'3 orifice (5.3 kw) on it.
I have been trying to work out what the R134a valve would be doing and i think it would be thinking that the superheat was way too low and would move to a closed position, what do you guys think?
It had a n'6 orifice in it (10kw), and i think it would have just worked like a fixed orifice system.
The superheat pixie had not been at the adjuster though :D
Jon
I checked the standing pressure and looked it up on my trusty slide rule and it confirmed R22 pressures (so the refrigerant hadn't been changed too) so i chucked a new Tex2 and n'3 orifice (5.3 kw) on it.
I have been trying to work out what the R134a valve would be doing and i think it would be thinking that the superheat was way too low and would move to a closed position, what do you guys think?
It had a n'6 orifice in it (10kw), and i think it would have just worked like a fixed orifice system.
The superheat pixie had not been at the adjuster though :D
Jon