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spill trips no chimney issue
hankwylerjr
Member Posts: 150
I have a small Penco where the boiler shuts off after about 10 minutes but sometimes not for a day or so. This is a brand new boiler and we have inspected the chimney and flu vent pipes no obstruction visible with inspection cameras. Also visibly observed normal fumes from top of chimney during use. Does anyone have any guesses as to what it can be besides an obstruction? Thermo, Gas valve is Honeywell everything brand new thanks in advance
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Chimney down-drafting?
Burners over-fired?All Steamed Up, Inc.
Towson, MD, USA
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
Consulting2 -
No CO detectors go off even near boiler Im going to run a combustion test but I don't see any soot might check the damper but again brand new maybe not adjusted properly? and far as the burners Ill revisit the issue as we thought that this issue was resolved thx0
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The house is old. Boiler is in basement we vented it after inspecting the chimney. Basement doesn't appear to have any drafts no kitchen hoods etc. Unless there is a draft I'm missing or something else. Chimney is high up no trees or other obstructions there are three chimneys on this building not near each other others are working fine. I installed caps with mesh last year. Im still thinking running a new chimney liner down maybe aluminum as its at 83 percent effiencent I think or a power vent but don't want to keep sinking money into it like to find the issue why its keeps shutting down.0
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The chimney is brick with old flu we didn't see anything visible that would cause it to trip. Nothing else venting besides that. Standard sized chimney didn't measure house is from 1956 but chimney is newer0
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What size liner can I use here if I chose to go that route to rule out other cause? 3 or 4 or more inch liner? Also does anyone know which category this boiler is? thx in advance0
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Ask your chimney guy for a Level II inspection report. There's a lot that may seem innocuous that can adversely affect venting. The liner is a huge one. Don't waste money on aluminum. Get ss for life. The liner must be properly sized as should be the connector.
You said the boiler shuts off. Does this mean the spill switch on the draft hood trips or the ignition drops out? Big difference.
You need someone to measure the inlet gas pressure under full load and compare with the rating plate, which states 5 wci.
You may need someone who can test for negative pressure in the Combustion Appliance Zone or CAZ. This would cause a flow reversal.
CO alarms are useless to detect spillage. Run combustion analysis.3
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