Water cooled Trane Heat Pump
I'm working on a heat pump that is water cooled, and the problem I am having is the person before I worked on it put in a new compressor that is having pressure problems. My boss says I should charge the unit up in the heat mode since it is winter, and check for at least 50psi on the low side, and about 225 psi on the high side.
When I looked at the unit the condenser had frost on it, and the compressor was hot. It has a klixon external overload switch which kicks off the unit in case of it overheating, etc.
When I charge up the unit, the low side goes down to 5 or 10 psi, but when I turn the unit off, it equalizes with the high side at 110 to 125 psi. When I turn it on, the high side reading is about 140 psi, and the low side reading shoots down to 10 psi.
It takes a charge, but it seems like it takes forever and the low side never gets me to where I want it to which is 50-55 psi in heat mode. The water temps on the inlet and outlet are 72* and 71* degrees respectively, but the compressor is hot to the touch.
What could be the problem? Should I let the compressor cool off totally, and put the freon in hot water then try to charge the unit allowing it to flow through faster before the compressor gets hot again, or could there be another problem?
I hope there may be a tech that can help me, and if I can also call you on the phone to walk me through this thing, because it is giving me hell.
Thanks.