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Forum: Geothermal & Heat Pumps

11-10-21, 08:51 PM

Replies: 8

Replacement for R-12

Views: 6,041

Posted By BradC

Just to be ultra-pedantic, you can charge the...

Just to be ultra-pedantic, you can charge the system as a vapor but it must be withdrawn from the cylinder as a liquid.

R410a is not a substitute for R22. *ever*.

Forum: Geothermal & Heat Pumps

11-10-21, 08:44 PM

Replies: 8

Replacement for R-12

Views: 6,041

Posted By BradC

Please don't use straight Propane in an R12...

Please don't use straight Propane in an R12 system. The appropriate blend to replace R12 is about 40% R660a (iso-butane) and 60% R290 (propane).

In this chart OZ-12 is the 40/60 blend. Watch the...

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