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This happened to me when I was running open loop except it was the reverse. Unit was shutting down because it got too cold from extremely low flow. The manufacturer (FHP) recommended using Muriatic...

Another vote for 20% Methanol.

When I was running open loop, my lines clogged up severely after a few years. I had to use Muriatic Acid to clean them out.

I'm with the OP on this. She tried to allow Waterfurnace to do the right thing, but they failed miserably. This is why I do as much as possible myself.

As far as I can remember, the highest my EWT ever got in previous summers was 70-75 F. This year I'm already running around 80-85 F. Right now I'm just concerned about performance, but if this...

Anyone else having the highest ewt's ever this summer? With this heat wave hitting the midwest and no signs on cooling off I'm in for a tough summer. I'm getting mid 70's for entering temps, and...

Skyheating is right. Geo will always be better..............when installed correctly.

Not to derail this topic too much, but I'm curious about this compressor. Do you know if it'll have some strategy for start-up to reduce amp draw? If it does, I'm wondering what minimum wattage...

Did any of them mention pipe diameters or flowrates? For a 3 ton closed loop system it is generally recommended to have 9 gpm overall. So if that 9 gpm is split amongst 2,3, or 4 loops, you want to...

When it's pump and dump, I believe you can get away with much less flow (especially in the first stage). I'd shoot for 5 or 6 gpm just to be safe in case you go into the 2nd stage.

Yeah without knowing a lot of details, it basically comes down to payback time. The vertical wells are more efficient, and they will eventually payback over some period of time. The question is,...

Well I certainly don't claim to be qualified to answer your question, but I also have a FHP model. I found out a few years ago from a design tech at FHP that the reversing valves are designed to be...

Any geothermal installer worth his soul should give you detailed info on the loop he/she plans to install. That's the most important part in geothermal in my opinion. Anybody can throw in any...

3 gpm per loop is only correct for 3/4" pipe. For 1" pipe you need 4 gpm per loop to have decent turbulence. At any rate, that contractor sounds like they are reasonably knowledgeable in loop...

I tend to agree.

I would be skeptical of anyone quoting anything more than 3/4" pipe for the loops though. From an efficiency/cost standpoint, 3/4" is the only size that makes sense. You get a...

Every loop is different. I'm no expert, but in my opinion this is how I would approach it:

1 - Determine how much heat gain/loss you have to subject the soil to. This doesn't necessarily mean...

I'm still really confused about your description of your loop. Can you tell me exactly how many lineal feet of pipe you have buried in your yard, and at what depth?

Your EWT is way too high. ...

What's the nominal tonnage of your unit? I'm not familiar with their naming system.

Do you know what your entering and exiting water temps are? 4-5 feet deep for a loop is not much so I wouldn't...

Yeah something definitely doesn't add up regarding the 7 degree difference with no flow, but it still seems like an undersized loop. You EWT is shooting up almost instantly.

I calculated my loop...

This sounds like a textbook case of undersized loop. However, I'd like to ask again..... have you checked the EWT after the system has sat idle for about a day? I'd be curious if your EWT drops to...

What's the EWT after the system sits idle for a long time? What I'm getting at is.............is 93 the actual water temp that low? Doubtful. I'm betting you don't have enough loop or as the...

So you described the trench, but you didn't describe the loop. How many parallel runs? What size piping? My gut says you don't have enough loop. Even if he put in 4 pipes into that trench (2...

Yeah I put methanol in my loop, and I haven't had a single problem. No leaks whatsoever. I did a 20% methanol mix.

Is your loop holding a slight positive pressure?

Can you elaborate a little? Are you worried about 2 vapor barriers?

It's never too early to plan right? I don't see myself building another house for a few years, but that doesn't stop me from planning in my head. So let's say anything goes.............. what sorts...