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<p>After hours of hunting for a replacement pump, that had the
required 30gpm at 0 0head and 32ft of head at 0 output, I found
one at Grainger in KC mo. However, Fed Ex brought it to OKC on
Friday but left it in their distribution center. Grainger
customer service help at the counter ordered another one for me to
be delivered today before 12noon. It arrived and I spent 7 hours
re-plumbing my installation in my Mechanical room. My lead in
pipes to the energy field are 1in poly pipe, with several ells and
tees on the input side, and then 3/4 pex on the output side. It
worked for 12 years, but was inefficient after I ran the numbers
on the head loss at 10gpm for a 3 ton unit., My energy field is
3000 ft of 2in pipe in the ground at 6-8ft of depth. There is a
foot of sane above and below the pipe in the ditch. There are 2
pipes in each of 3 ditches all connected in series. The
calculations figure 18 ft of head in the energy field at 10gpm.
There also was an additional 9.5 ft of head in the connections at
the unit. I changed everything over to 1-1/4 through the pump. I
also installed thermometers at the input and outlet. I could not
find an affordable flow meter that would not restrict flow. It
now runs, and I have 82 degree water entering and 91 exiting. The
output is cool air and hopefully the house will be cool by
tonight. I also found a leak in the return air duct that is
pulling outside air, so that is the next project. The return duct
was the flexible installed in 1985. the ceiling joists are part
of the roof trusses and there was 24inches of insulation blown in
the attic. I need to find some small guys to replace the duct.
The servicing dealer never returned my call after charging me $165
to tell me they did not have a clue. I know it was not a real
sanitary installation, but the first unit worked for 25 years
until struck by lightning, and this one worked good up until a
year ago when I should have added freon. I added some R410 and it
now works fine. <br>
</p>
<p>Cecil in OKla</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 9/3/2022 6:55 PM, Email Service
wrote:<br>
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<p class="MsoNormal">Cecil,</p>
<p class="MsoNormal">I have a 5 ton and a 2 ˝ ton geothermal
systems in our house and have experienced some of the same
issues with equipment and inept service people. Some things
that I installed to help diagnose problems are: Install
thermocouples (taped and insulated) on the enterring and
leaving water lines and duct thermometers on the entering and
leaving coil air. This information and the installation
performance charts help with finding the problem.</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The circulation pumps are 1/6 HP Grundfos
one the 21/2 ton and 2 1/6 HP on the 5 tom sized for approx. 3
GPM per ton’</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Joe Morgan</p>
<p class="MsoNormal"><o:p> </o:p></p>
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<b>Sent: </b>Thursday, September 1, 2022 4:06 PM<br>
<b>To: </b><a href="mailto:at@lists.antique-tractor.com"
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<b>Subject: </b>AT Digest, Vol 56, Issue 1</p>
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Today's Topics:<br>
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1. Re: No A/C in Oklahoma in August!!! (Cecil Bearden)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Thu, 1 Sep 2022 06:12:46 -0500<br>
From: Cecil Bearden <a class="moz-txt-link-rfc2396E" href="mailto:crbearden@copper.net"><crbearden@copper.net></a><br>
To: <a class="moz-txt-link-abbreviated" href="mailto:at@lists.antique-tractor.com">at@lists.antique-tractor.com</a><br>
Subject: Re: [AT] No A/C in Oklahoma in August!!!<br>
Message-ID:
<a class="moz-txt-link-rfc2396E" href="mailto:ec1c959e-1ec5-2dd6-a7c7-fb54bfc07324@copper.net"><ec1c959e-1ec5-2dd6-a7c7-fb54bfc07324@copper.net></a><br>
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<br>
Since the experience and knowledge on this list is so varied I
am <br>
posting this in case you guys can give me a little help.??
Monday <br>
evening we had one of OKlahoma's summer monsoons complete with
10K <br>
lightning strikes per hour.?? My Climatemaster Geothermal A/C
system <br>
quit and I did not know it until Tues night as my house is
super <br>
insulated.?? I have 3000ft of 2in pipe buried 6-8ft in 3 500ft
trenches <br>
with 1ft of sand above and below the pipe.? I built this
myself in 1985 <br>
when I had more time and energy and broke.<br>
<br>
I have been trying to diagnose what has happened and really
flying blind <br>
on it because there is so much computer crap on this one and
it is <br>
already obsolete even though it was installed in 2010.? I also
do not <br>
have thermometers or flow meters on the ground loop.? The
thermometers <br>
died many years ago, and flow meters were terribly expensive
when this <br>
system was installed. I had a tech from a Climatemaster dealer
in <br>
Kingfisher come out and he looked at the system and really
seemed to not <br>
understand what was going on., Kept telling me that I probably
added too <br>
much Freon when it was low over 2 months ago, and kept telling
me that I <br>
needed to remove the Freon and vacuum it down and add only a
certain <br>
amount. But it was working fine before the storm. the
circulating pump <br>
was very hot. I threw another circulating pump on it and added
a couple <br>
of valves to make it easier to drain the system to replace the
pump. <br>
Same problem. I took the new pump apart to make sure it was
running and <br>
determined the check valve was reducing flow, the old one did
not have a <br>
check valve. ? Removed the check valve and it ran longer
before shutting <br>
down. Finally able to get some numbers of the old pump I found
the old <br>
pump was a 5/16hp and the new one was 1/25. Also old pump was
larger <br>
inside. This is a 3 ton unit operating at 70% capacity, so
only 9 <br>
gallon/minute max flow should be needed.? Not sure if there is
a problem <br>
with the head on the pump or the flow. ? Another pump is
ordered and <br>
hopefully will be here today.<br>
<br>
<br>
><br>
<br>
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End of AT Digest, Vol 56, Issue 1<br>
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