We just installed a Froiling 20/30 where I work. On the back of the boiler, middle-left hand side, there are 2 pipes that exit the boiler. They look to be 3/4". The heating contractor checked with the wholesaler and the owners manual. He could not find the answer in either place. We have speculated a few things. DHW coil (doubtful since we didn't pay for one), instrumentation ports, recirculation circuit, etc... Can anyone ell me exactly what these pipes are for?
Thanks
Thanks