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Author:
ltgrzbrnz (NY)
Hello, I have 2 American Standard Boilers (GPMX 3 / 1B J1) and the burner thermostat/aquastat/limit switch, whatever it is called, is a Honeywell, it says 123727 on the top and 7241 on the bottom (2nd boiler has a different number on the bottom.) I can't find anything about it on the web. It has a knurled wheel and what looks like a fixed arrow. The entire wheel moves. But, there is also a rider piece on it that looks like it could be moved by clicking it over the knurls or detens on the wheel with the temperature numbers on it. So how does one adjust this thing?
The boiler for the second floor runs between 170 (not observed) and 210 (observed). The one for the 1st floor runs between 170 and 180. (Singing) "Baby its cold outside" (like 4 degrees) and with the house thermostat turned all the way up the 1st floor won't go above 65. The pump on the boiler runs continuously and the flame comes on from 170 to 180 over and over again. I live upstairs and am fine. How does one adjust the cut in/cut out temperature for this boiler?
The rider piece is around 180, though hard to tell. I have not successfully moved the rider piece. It will not move easily, and the last thing I want to do is break it! Does it move? With a lot of force? Is there a trick? Any help is appreciated understanding this thing. (I'll try to get a good picture, but right now I need advice!)
Thank you,
Brian
Edited 2 times.
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