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Old 05-21-11, 10:35 AM   #1
skyking
Helper EcoRenovator
 
Join Date: May 2011
Location: Western Washington
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Default New geo system install

I was pointed here from ecomodder's forum, thank you piwoslaw.

My brother got a bid from a local contractor for geo and solar domestic water, and we are doing all the digging.
ClimateMaster Inc. - ClimateMaster Residential Units

That is the pump.
I'll get more details of the equipment for the solar and the heat exchanger. This system will pump excess heat from the solar panels into the ground in the late summer and fall. It is so effective, an unoccupied house that was not using domestic water for the summer ended up with ground temperatures of over 100 F!

First step, delete a 45' locust tree. Sorry, I forgot to take before pictures.


I dug down with the 4' smooth bucket to about 3.5' and found caliche, a form of hardpan. That was the first surprise. Next I "found" and repaired an undocumented sewer line to the neighbor behind. That moved our geothermal grid about 8' over in a yard that was too small already.
Now I'm down in the dig, switching over to the 3' bucket with the tiger teeth to get after the hard pan.



Getting dark on Thursday, I have about 80% of the excavation to depth.



We had fun finding places for all the dirt on a large city lot. Got dirt?



By the time I had it dug out, I had a little mountaintop to sit on and nowhere to go.



The contractor's crew fusing the 1.25" header onto the three 600' loops of .75" poly.



The loops have been filled and air purged, and under a pressure test. After filling the tubes can be arranged in the hole more easily.



The backill process begins. The soil was hand bedded over the pipe to insure good contact and no roots or rocks against the tubing.



We have a 3' lift over the pipe and have watered it in before compacting. Today we will install my innovation, a grid of drain pipe over that 3' of dirt.
The soils in this area are below optimum moisture for compaction whenever I dig it up, so I figure it will be below optimum for good contact as well.
I will put in a grid of perforated drain pipe and connect the downspout drains and yard drains to it to automatically keep the soils below moist.


Last edited by skyking; 05-21-11 at 10:38 AM..
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The Following 4 Users Say Thank You to skyking For This Useful Post:
AC_Hacker (05-26-11), buffalobillpatrick (03-01-15), jeff5may (12-26-20), Piwoslaw (05-23-11)
 


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