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wirechief
 New Member
 Posts:72
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| 05 Feb 2009 11:53 AM |
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I took another picture, (was not sure the geo was running when the first shots were taken) I labeled the meters in the comments, it would seem that with the cold temps that we were getting last night and this morning we would of shut down with no pressure. I might add the sink holes were first noticed after a very heavy down pour, we got at least 1.5 inches of rain the day before i took the pictures, I accepted it was the dirt settleing in at that end of the trench. they ran a pressure test of the loop before startup it held at 41 psi for over 24 hours but of course that was before the day it rained. |
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| 1500 sq ft home with 5 ton Geocomfort heat pump<br>desuperheater,3200ft of horz loop. Howard city,MI. |
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Palace Geothermal
 Veteran Member
 Posts:1609
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| 05 Feb 2009 12:00 PM |
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the pics with your comments still show 0 pressure. The system should show pressure when the heat pump is not running. At least 10 psi, 40 psi would be max. |
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Dewayne Dean <br>www.PalaceGeothermal.com<br>Why settle for 90% when you can have 400%<br>We heat and cool with dirt!<br>visit- http://welserver.com/WEL0114/- to see my system |
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wirechief
 New Member
 Posts:72
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| 05 Feb 2009 07:20 PM |
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Well I found a couple of temperature sensors, source in 38.8 source out 32.4 with 14.5 deg's outside, now all i can do is watch. I contacted my installer but will follow up again with him tommorow on the readings that the pictures i took indicated this morning. I suspect the loops have actually gotten colder but i dont know and it will take some monitoring to find out. |
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| 1500 sq ft home with 5 ton Geocomfort heat pump<br>desuperheater,3200ft of horz loop. Howard city,MI. |
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conniepangan
 Basic Member
 Posts:112
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| 05 Feb 2009 08:14 PM |
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geodean, i was looking at my unit which is also geocomfort brand. The psi shows between 40 and 60 psi and running , is that not normal. It is 19º outside. the auxilliary heat comes on too at 67º setting |
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Palace Geothermal
 Veteran Member
 Posts:1609
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| 05 Feb 2009 10:07 PM |
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connie, your pressure is OK. There is no need to go higher than 40 psi, but not a problem if higher. Have you tried turning off the aux heat to see what happens? |
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Dewayne Dean <br>www.PalaceGeothermal.com<br>Why settle for 90% when you can have 400%<br>We heat and cool with dirt!<br>visit- http://welserver.com/WEL0114/- to see my system |
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joe.ami
 Veteran Member
 Posts:4377

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| 06 Feb 2009 07:34 AM |
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Not sure where I got the DX notion (I did have wirechief confused with another user at one point.....). You definately need to find out if there is pressure. A 2 stage water source would be less alarming than a considerably over sized single stage. Still not sure your usage is alarming. If you do have pressure in the lines, then the sink hole would indicate poor compaction which would run up operating cost some (but will likely be remedied as soon as our 5 feet of snow thaws....Lord you'd think we were in the upper penninsula). Joe |
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Joe Hardin www.amicontracting.com We Dig Comfort! www.doityourselfgeothermal.com Dig Your Own Comfort! |
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wirechief
 New Member
 Posts:72
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| 06 Feb 2009 08:00 AM |
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The outside temp of 14.5 and loop temps indicated with the digital meters are in align with my geo design report, the mechanical meters are crap and not really providing any information (see the picture http://picasaweb.google.com/silvermachineman/GeothermalMisc#) I discussed the loop pressure with the contractor installer and he was not concerned with loop pressures because of our operation so far in -8.5 deg F temp we were able to still provide 47,445 BTU/hr the house of course was cooling and was not designed to sustain 70 degrees without aux heat. I am begining to think that my Kwhr usuage is higher since we have a 5 ton system and probably could of made do with a smaller system for our house size of 1500 sq ft. I did notice condesation on the Source out line when the weather thawed on Dec 27th, possibly melting water in the sink hole affecting this ? (dont know) also the stage1 and stage2 operation i noticed when I started this thread is apparently normal if stage1 cannot hold to the inside tstat setting and falls by 2 deg then this stage2 cycling kicks in and trys to compenstate, I have to think though at that temperature there is not much compensation gonna happen but now that i have some digital sensors monitoring the loop temps it might reveal more of what is going on. The cold weather is just more global warming according to democrats who believe that theory, it sounds good when you are intent on raising taxs for your pet pork project. lets see if we get anything back with these rebates...(shakes head and chuckles) |
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| 1500 sq ft home with 5 ton Geocomfort heat pump<br>desuperheater,3200ft of horz loop. Howard city,MI. |
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conniepangan
 Basic Member
 Posts:112
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| 06 Feb 2009 08:09 AM |
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Geo, thanks for that info. I was looking at the manual for auxilliary heat and it's attached to the back of the compressor...same as the picture shown by wirechief. I am frightened to mess up the wiring there. Do I turned off the switch off first then go to that panel? Maybe I should talk to our installer first before doing this. |
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wirechief
 New Member
 Posts:72
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| 06 Feb 2009 08:27 AM |
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conniepangan if your system is under warranty i would get the people who installed and guaranteed your system back to do any changes. |
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| 1500 sq ft home with 5 ton Geocomfort heat pump<br>desuperheater,3200ft of horz loop. Howard city,MI. |
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joe.ami
 Veteran Member
 Posts:4377

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| 06 Feb 2009 08:49 AM |
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WC, a recent calculation I did revealed that there was only about a $70/yr op cost difference between a 4 and 5 ton (on that home). Your ton/sf jumped out at me so immediatly that I wondered how long your installer has been in the business. It sounds like you have enough return duct so there's not much harm in it, it simply takes extra energy to run larger compressors. As I'm sure you've noticed, there is disagreement among contractors as to how much aux. coils should be employed. One of the unfortunate consequences of an over sized system is that a compressor draws extra amps all the time vs an aux coil some of the time. Compound that with the additional installation expense and in the case I described ($70/yr savings) payback on the additional ton would be in the 30 year range (curiously a 4 ton system with 5 tons of loops had about a 20 year ROI). As you've already spent the money, I want to say again, that there is no harm in your system. There may be some inestimatable benefits (such as longer lifespan due to light load) as well as the reduced energy consumption. To your starting topic, I still don't have any reason to believe your usage is way out of line based on other feed back we are getting. Keep us posted, Joe |
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Joe Hardin www.amicontracting.com We Dig Comfort! www.doityourselfgeothermal.com Dig Your Own Comfort! |
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wirechief
 New Member
 Posts:72
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| 06 Feb 2009 09:01 AM |
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Thanks Joe, I had suspected what you mentioned on comparisons of 4 and 5ton units, I suspect they were trying to make sure the system had enough poop. I really wasnt looking for the cheapest solution as has been mentioned on another thread geothermal construction costs leave little profit for the company and hopefully this one will be able to weather the current economic situation and be available for help in the future. I am looking to see if I can still get the metering for the geo completed to our electric companys specifications so i will get the lower rates. calculations made with my geo design report give pretty close to what I am seeing in kwh usage and of course we have had some long cold days beyond the estimate of the annual hours on the report. |
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| 1500 sq ft home with 5 ton Geocomfort heat pump<br>desuperheater,3200ft of horz loop. Howard city,MI. |
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