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gas valve
Paul S_3
Member Posts: 1,261
On a 90 plus furnace with a differential pressure switch, what is the purpose when the gas valve has a fitting hooked up to the positive side of the pressure switch teed in with the burner compartment?im working on a Bryant 90 plus mod# 398aav036080aaka ive found a bad gas valve and i was just wondering ...ive seen them on other types of equipment Thanks paul s
ASM Mechanical Company
Located in Staten Island NY
Servicing all 5 boroughs of NYC.
347-692-4777
ASMMECHANICALCORP@GMAIL.COM
ASMHVACNYC.COM
https://heatinghelp.com/find-a-contractor/detail/asm-mechanical-company
Located in Staten Island NY
Servicing all 5 boroughs of NYC.
347-692-4777
ASMMECHANICALCORP@GMAIL.COM
ASMHVACNYC.COM
https://heatinghelp.com/find-a-contractor/detail/asm-mechanical-company
0
Comments
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It's there to provide a reference of the slightly negative pressure in the burner box to keep the furnace firing rate correct.Steve Minnich0
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Thanks for reply but Why does it run with it off ? Thanks Paul sASM Mechanical Company
Located in Staten Island NY
Servicing all 5 boroughs of NYC.
347-692-4777
ASMMECHANICALCORP@GMAIL.COM
ASMHVACNYC.COM
https://heatinghelp.com/find-a-contractor/detail/asm-mechanical-company0 -
Gas valveASM Mechanical Company
Located in Staten Island NY
Servicing all 5 boroughs of NYC.
347-692-4777
ASMMECHANICALCORP@GMAIL.COM
ASMHVACNYC.COM
https://heatinghelp.com/find-a-contractor/detail/asm-mechanical-company0 -
It will run without off. It just won't run at the firing rate it's designed to run at. I don't think the earliest of Plus 90's used that but I have a 398 manual right after they made the change.Steve Minnich0
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