Geothermal dig and loop field installation

Published 2022-10-14
Geothermal dig and loop field installation - I use my Kubota KX080 excavator to move 400 yards of dirt so we could install a geothermal loop trench field. I also had my Bobcat T66 on site to help move material. This is a 4 ton system so there's four slinky coils going in. The coils go on a bed of stone dust and a layer of stone dust also covers the coils. I pressure test and bubble test all the fusion joints. Early on one of the trench walls collapsed, luckily it wasn't that bad and only happened once.

All Comments (21)
  • @dontknowler
    1. It is best to keep the system under high test pressure all the time you are doing the backfill. Having someone monitor the readings in case you disrupt the piping with your heavy machinery. This is also good long-term, reducing tension between piping and soil under normal load. 2. The sandbed &|or rock dust does need compacting. If your time is limited, just keep pouring water over it as you are proceeding. Otherwise you will be getting very high mechanical tensions in the points where the coils overlap as the soil will be contracting by itself later on. | IMHO and AFAIK disclaimers go here |
  • You did so much work! Loved watching the whole process. Thank you for your hard work Sean. You rock. Great job!
  • @rudycramer225
    Very enjoyable to see a professional in action. Great work!
  • @xXGENDAMAGEXx
    We use the same kind of pipe in plumbing. Pipe bursting sewer lines. We run a heavy cable up the sewer from down by the city tap. And hook that to the cutter head that then has a section off pipe attached to it. We had a waffle looking heater. We put in between the two pieces of pipe mounted in a jig. Then move the pipe onto the heater. As the pipe ends melt to about a quarter inch bead. We move them away and pull the heater out. Then move the pipe ends together in the jig and mash the melted ends in together. After joining the first section each section afterwards. There’s another tool to reach in and carve away the inside bead. We’ve done this underneath structures built over the sewer and just because the customer didn’t want their manicured lawn torn up for the season.
  • @zaaz1471
    great vid - very informative! that 20 minutes flew by :D
  • rly nice video, all steps covered thoroughly with excellent footage. bravo!
  • @ZiemsRyan
    Awesome content! Thank you for this video!
  • @ARTTLife
    Nice thinking about tackling this ourselves
  • @kerem7546
    how many square feet is this system cooling?
  • My question is like tornados....what pipe is used . Please write full specifications
  • @alaniemieckota
    What is the building size? What is the liquid capacity of the system?
  • @larion3296
    Interesting. Very different from the system we use here in Sweden. We dig long trenches, about 1.5meters wide (5 feet) and at least 400 meters long (1300feet), often 800 meters. And the tubing is put down in straight lines at either side of the trench (forward one side, return one side). One loop in one thrench with a 180 degree turn a the end of the trench. Thicker PEM tubes are used, 40mm i think. The tubings are never crossed or allowed to go closer than 1m apart without insulating them. Also
  • @danhard8440
    a good way to add free heat to this is solar to electric water heater
  • @djdidodi
    hello, what is the size of the pipe?
  • It would be nice to know what BTU amount those 4 sets of coils produce, heat or cold or both and a quick spiel on the pump unit and exchanger to get an idea how much that produces... you know like you said you were told on text temp just a quick run down ...
  • We are getting ready to put in our system. After watching this, glad we are doing it ourselves. The loops are not supposed to over lap and each run is supposed to be two feet apart because they need to transfer their temperatures to the soil efficiently. Also, they should be in a sandy loam bed if there is a lot of rock not white sand. This is not going to be a very efficient system.
  • @TheScytheMoron
    Isn't there some kind of system with colored smoke or so? Wouldn't that be easier to spot and way less time consuming?
  • @Rgrinkleson
    As an hvac tech myself, geo isn’t worth the cost unless you live somewhere extremely hot or extremely cold. An inverter heat pump is cheaper with less hassle and works well in most climates that stay between 15-110 degrees That house likely won’t get the most of that geo unless it’s been spray foamed. Now if you live somewhere with regular temps under freezing then probably not too bad. I’m not sure where this is