Boiler Low water cut-off


Old 12-19-07, 09:05 AM
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Boiler Low water cut-off

I have Smith GB200 Gas fired Steam boiler with a CycleGard CG 400P low water cut-off controler. The CG400 shuts the boiler off to check the water level for about 90 seconds, the green LED light comes on indicating it is checking. After the green LED light goes off, after the 90 seconds, it takes the boiler a good 2 minutes to come back on, shouldn't it come on almost immediately after the green LED light comes off.
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Old 12-19-07, 09:45 AM
Join Date: Mar 2006
Location: Wet side of Washington state.
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I think this is the unit you have for a low water cut off.

It is possible that the way the lwco is wired to the burner may be why it takes two minutes to reset. It may be a delay in the burner control itself.
Old 12-19-07, 11:03 AM
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The hydrolevel 450 for oil units will delay for 90 sec and fire back up. There could be up to a two minute delay. The control used to cycle off every 10 minutes whearther there was a call for heat or not. The newer controls do it only while there is a call for hrat. When the call for heat ends the auto timer is reset to "0" and will restart on the next call for heat. If you are having a hard time getting the heat to the system make sure you have good main line vents. This helps a lot.
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