Hello all, I would like to know if my Geothermal system is running like it is supposed to. Location is southern middle TN.

System info: Carrier GT-PX 50YD 4 Tons, 2 300ft wells, 1" loops, 1.25" headers, 20% Poly. Glycol, Bentonite, well cased to 100ft, water between 60-85ft, 1 Wilo Star S 30 pump (.97 A @ 244V), 2700 SQ Ft home, 2500 SQ ft basement, Ecobee thermostat set at 73 degrees, 1.5 deg differential (1st stage 71 - 73, 2nd stage 70, and Aux 10kw + 2nd stage 69 and below) Reverse stage is on, 1st winter.

House Average KW usage is 63 KW ($5.55 @ $.0882c/kw) since 1/14. Highest was 85 KW when the low reached 0 degrees F that night. The inside temp stayed at 70-71 with the unit never reaching set point until the next morning.

1st Stage @ steady state, HWG on. HWG set at 150 F.

EWT: 39.3 F
LWT: 34.1 F
Delta: 5.2 F

EWP: 44.2 PSI
LWP: 40.8 PSI
Delta: 3.6 PSI

EAT: 70 F
LAT: 93 F
Delta: 23 F

I am not sure what the water flow is. The manual indicates that a pressure drop of 3.7 PSI (Water only) @ 40 F is 11 GPM. If I multiply 3.6 PSI x estimated correction factor of 1.29 = 4.6 PSI, which is of the charts. am I doing this right?

I take it that's daily usage. So was this all house energy or just heating for $150/mo

Daily usage. That is for all house energy. The unit seems to stay at 12.3 amps at 244v in 1st stage.

Looks very good! What is the issue?

Thank you for looking over the info.

I haven't had any issues, other than not knowing what the flow rate is. I am surprised at how quickly the loop temps are recovering. EWT is starting in the low 50's at the moment. We had to add 100 ft of casing to each hole due to collapsing of the walls around 85 ft; after 100 ft it is solid slate, but I wasn't sure how the loops would behave inside the casing.