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Got to the bottom of a nuisence F-09 Munchkin problem
Typical intermitten problem. I would show up, test, adjust, watch, ask questions, etc and everything would work just fine.
I was about ready to get the homeowner a F-09 personlized license plate for their car! They have been patient about the whole issue and have back up furnaces, thankfully.
Somewhere along the line the homeowner and plumber added a natural gas backup generator to the home. Well the thing exercises once a week.
You guessed it. The gas line the plumber installed was never sized for the additional load! I suspect if the Munchkin was running when the generator exercised, the gas pressure plumeted causing the lockout.
Also be aware that most generators require 11- 14" wc. Around here the typical meter set and regulator is a 7" set.
Now the plumber will need to request a 2 psi meter set and add the correct sized regulators at the gen set and appliances. The fuel supplier will also upsize the meter for the additional load.
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