Geothermal Heat Pump Problem...
Problem: Evap coil is icing up and not cooling space down to setpoint.
R410A 340 High Side 76.5 Low Side
10.7 degrees F Subcooling
78 degrees F EWT
82.5 degrees F LWT
SA - 64.6 degrees F
RA 74.4 degrees F
These are the technical data values that are listed in the manual for cooling:
244PSI High side 81PSI Low side
8 degrees F Subcooling
51.2 degrees F EWT
I think i know what is wrong, but i've only had a small about of experience working on geothermal heat pumps. I'd like to know what someone with more experience thinks. Thanks in advance for your response's. Unit is a Northern Heat Pump MN: RAVE-312-C131
Look at it like its an air to air. You're not having trouble with the water side. Still doing the same thing.
What is the flow rate through the loop? What is the Heat of Rejection? Why are you putting a gauge set on the unit BEFORE performing the HR/HE calculations?
Tommyz23: If it were an air to air, i would think the TXV is stuck closed and needs to be replaced.
Bergy: I have never checked the flow rate through a loop. How would i do it? I'm not sure what the HR/HE calculations are. Can you explain?