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It sounds like your expansion tank may be faulty. If it's a diaphragm type tank it may need to be replaced
I think it is a diaphram type as it is newer
I believe it has a bicycle type valve on it. The tank seems empty though
is it possible the valve regulating water pressure going into the system is faulty? There is some blue green corrosion around the gasket and screws
is there any way to test the expansion tank ie check the pressure with a tire gauge?
You can't test the expansion tank except if you tap on it and 2/3's to 3/4's sounds empty then it's ok. If the feed valve was bad the pressure would climb even if the burner wasn't running
The only way to know for sure if the expansion tank is bad it to remove it but tapping the tank is a good indication. You can check it when you replace the relief valve since you will need to drain the system
so if the expansion tank seems empty and the pressure is not climbing from the feed valve what could be the problem?
those are the only likely culprits, as long as the pressure stays below 30 psi you are ok
so it is okay to run it around 20 then right?
yes 20 to 25 psi is ok
12 -15 psi cold is normal
20 to 25 psi hot is ok
one last question: is the Laars Endurance a good unit? Also, is there any maintenance I can do to keeping it running in top shape?
ok great, thanks for the tip. I am new to propane boilers
I am not a fan of Laars. I would suggest dumping it if starts to give you trouble
what temperature should it be set to?
These units don't require much maintenance except to clean off the burners if rust and dirt starts to accumulate on the burners.Water temp depends on system design temp typical temp is 180-190
Thank you very much for your help Rick
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