I had a geo-therm system installed in the house we built. We have the afore mentioned system for the downstairs but have a smaller 2 Ton variteck for the upstairs. Both units are supplied by two circulating pumps in series. This is a closed pond loop.

This summer the system performed great. Now however, the 20 degree nights leave a lot to be desired of this system. I have had a terrible experience with the outfit that installed the system. I feel like I know more than they do and I know squat. I found a company in another town to come bail out the original installers. They basically filled / charged the pond loop. I had them come back out two weeks ago and put another charge on the loop. For some reason, it was air bound.

I figured this might solve the inept performance of the envision unit. Then it got COLD for a couple of days. The system runs for hours and willnot get above 71 deg. Of course since I do not have zone control (didn't know, wasn't offered) our bedroom is quite cooler than that...

What I have done is checked the Y1 and Y2 terminal with referenct to the common and 24V is present when calling for stage 2 heat. Looking and reading the installation manual I found dip switches misaligned according to the book. I have placed them in the position per the book. This seemed to have allowed the fan to function on variable speed. Last night I placed a thermometer between the heat exchanger and blower. Air temp is about 81 deg...shouldn't this be near 100 deg?

Any thoughts on where to go from here? Water temp best I can tell is 49 deg.


Mike