FHP expansion valve problem
I have been asked to take over a bldg. w/ several florida heat pumps wich 9 units have had expansion valve failures apparently! Before accepting the work wondering if anyone has had any problems similar with FHP unit water to air 3-6 ton. I am obviosly concerned that they were diagnosed properly but the previous contractor is very reputable
Have had a couple, 9 in one building does seem a bit high. We have seen some water flow issues give simular symptums.
i would have to agree with geo man . Ive had 12 carrier wshp that were giving the same symptums and turns out to be water flow issue.
Originally Posted by mo geo man
Had one today on a two stage FHP (20 ton) one bad valve, the other works perfect, same water on both compressors...
If a day goes by and you have learned nothing, I hope you got a lot of sleep.
I have to replace the power heads on many FHP 10 to 20 tons
They do not appear to have a separate circuit for heating
The TX appears to be Bi-Directional, no check valve.
Yes they fail often on units less than 5 years old.
Only good thing is that they let me know the TX power head is bad by
showing a low suction pressure with a very high discharge pressure of over 290 Pounds.
It could be that the Sporlan kt style Expansion valve elements are faulty to
At any rate they appear to have a high failure rate.
Ok so many of us are replacing those tx's. Some of us are not getting the unit running even after replacement. I'm going to work on a problem unit that has never operated more the 20 minutes without tripping. In heat or cool now. My issue is a year old. I'm thinking water flow now. so thats what I'm going to revisit. If I recall my unit requires 12 gpm and the pump is sized right.
Same problems looks like a design issue with in the unit. TX or water flow restriction.
If you think our goverment is screwed up. You haven't lived in another country.