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That is a very high temperature increase on your loop. Looks like low flowrate.

What's the flow path for the loop through the various units? Do you have them in series and basically put the most important unit first? Do you have a series of ball valves in a parallel header?

I said the dehumidifier terminal. In other words, when the thermostat calls for the de-humidifier, it powers that terminal, which ends up powering the cooling terminal.

I like the Ecobee Smart SI, but can it control humidity via the A/C system? I don't want to install a de-humidifier. I'd like to just run the A/C. Can you wire the de-humidifier terminal straight...

Edit: nevermind about that one on amazon, looks like it doesn't have wifi, even though the search terms included wifi.

I tried searching, but found very little discussion about this topic.

I have a vacation rental that I want to manage from 1000 miles away. I want a wifi thermostat so I cna adjust temperature...

I have no idea what that additive is. I've only ever heard of people putting some kind of glycol or methanol in closed loops. I'd bet that's at least part of your issue. The other problem is...

When I say compliance I mean some kind of gas chamber that allows the liquid volume to change without the pressure changing a lot. The larger the gas volume the less the pressure changes.

I know...

No that's not normal, but are you sure it's been exactly a year? My closed loop has very little compliance, so my pressure swings up and down quite a bit. You may just THINK you're losing pressure,...

Ok thanks for the reply. I appreciate the honesty. What's your feeling on 10 gpm with a 4 ton system? Should I even bother with another pump?

Well I'd think long and hard about that natural gas line. The installed cost is comparable between geothermal and natural gas in your case, and I'd bet it would cost you less to operate the natural...

Hey guys,

I've been out of the loop (no pun intended) for a few years. I originally setup my geothermal about 9 years ago. I have a 4 ton FHP system with a single Grundfos UP26-116 loop pump. ...

I'm seeing superheat around 60 and subcool around 18. This is a 4 ton water-air unit, and according to my unit's charts the high side pressure is low in all modes but especially during heating. Am...

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...

I ran open loop for awhile until it clogged. Then I cleaned it out with Muriatic acid and switched to closed loop. Did you try Muriatic acid?

My thermostat distinguishes between aux heat and emergency heat. Emergency heat is only the backup electric elements while the aux heat is both. You might want to check and see what is actually...

Very early this morning I woke up and noticed my thermostat (VisionPro) read "Aux Heat". This rarely happens. In fact, I can't recall a time ever where it went to Aux Heat other than when I was...

My system used to be open loop and had this issue. So I decided to take a look at the lines, and I was surprised to see they were more than 50% clogged with rust build-up.

People who say you should have 1 or 2 pumps based on the tonnage are wrong. That's like saying you need 1 ton per 600 square feet of living space. The size (# of tons) of your system determines the...

Sounds like you probably have oversized units. During the heating season this is perfectly ok. In fact, my system sounds pathetic compared to yours. If I don't keep my woodstove running pretty...

I can confirm this.

I added a riser pipe in my loop with some clear tubing, and I pushed in some air into the top to create a little compliance. Now my loop pressures don't fluctuate nearly as...

Can anybody see anything wrong with this unit:

http://cgi.ebay.com/EcoSmart-NEW-27-kw-Electric-Tankless-Hot-Water-Heaters-/170393956812?pt=LH_DefaultDomain_0&hash=item27ac4571cc

Seems pretty...

I did the slinky method for my install. Cost me a little more in pipe, but it installed way faster. If you have really sandy soil conditions like me it works out great.

Solar is out in my situation. The front of my house faces south, and there's no way the wife would allow a bunch of solar panels on the front of our house.

Does anyone else know of other tankless hot water systems that can handle high temp inlets?

I've been using my geothermal system now for about 5 years with a single water heater. I know a buffer tank is more efficient overall, but when we were building the house we tried to keep costs down...