Boiler Shuts Down

Old 01-20-09, 03:17 AM
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Boiler Shuts Down

Here at work we have a Weil-McClain Boiler, When it's working correctly, it's goes up to 7 pounds of steam and shuts down. Then at 3 pounds the fan for the outside air intake goes on and in turn the fan on the boiler goes on for about a minute and then the gas light goes on and the boiler is fired up. Lately, when it goes to 3 pounds, the outside air intake fan goes on and thats about it. You physically have to go into the burner panel and push the reset and then it works for a few hours. It's been going down quite a bit. Had a tech here on friday and he cleaned and electrode and some other things and it worked fine all day and then went down at night and had to be reset. It's still like that. It's down this morning but I want to keep it that way until he gets here. Any suggestions what it might be? Thanks.
Old 01-20-09, 05:23 AM
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Oil or gas?
The big question is why 7psi and back on at 3 psi. Depending on your vents they may never re-open to vent more air. Most systems work on 2 psi off and back on at 0.5 psi. The more pressure the exponential grow fuel costs. Seven psi if not needed is a lot more fuel than 1 psi. If this system is all cast iron radiation or cabinet convector's that is plenty. There are buildings a city block square operating on 2 psi. If your system is all cI radiation and does not work on 2 psi you have other issues.

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