Geothermal Maintenance 101 - Heat of extraction / rejection

The first thing a geothermal maintenance technician should is how to complete heat of extraction / rejection. This test will allow you to properly confirm that a geothermal system is performing properly. With this simple process you can confirm that the system is running at peak performance during a maintenance while also preserving the systems life by not introducing contaminants to the refrigeration system.

Special thanks to Water Furnace International AND THEIR STAFF for help with knowledge and training materials (non sponsored).

Water Furnace 7 Series Installation Manual can be found at this link (see page 50 for pressure drop table to calculate GPM)
https://www.waterfurnace.com/literature/7series/IM2700ANB.pdf

Water Furnace 7 Series Specification Catalog can be found at this link (see page 37 for the table I used to confirm performance)
https://www.waterfurnace.com/literature/7series/SC2700ANB.pdf

Testo 549i pressure gauge (paid link)
https://www.amazon.com/Testo-High-Pressure-Gauge-Generation-Degree/dp/B07V714BNN/ref=sr_1_3_mod_primary_new?crid=356KA1LQA5P3E&keywords=testo+pressure&qid=1697577162&sbo=RZvfv%2F%2FHxDF%2BO5021pAnSA%3D%3D&sprefix=testo+pressure%2Caps%2C78&sr=8-3

Needle for testo pressure gauge (will require a brass adapter)
https://geohydrosupply.com/pressure-gauge-probe-1-8/

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