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I contacted Coleman Tech Support about the pressure spec for a pressure switch. The reply was:
"Current part number for replacement switch is 324-35972-000 set point is .1 inches of W.C. Booster fan needs to create a minimum of at least -.2 in W. C. as measured at the upper tap on inducer."
I believe to check for the -.2 in. W.C, I would tee into the upper hose with a manometer, but don't understand what the set point is all about.
Why are there two flex hoses instead of just one? Second tap is to allow air to enter the other side of the diaphragm, this enabling movement of the diaphragm?
This switch isn't bad - just need to learn how to confirm proper pressure is reaching this pressure switch and others.
"Current part number for replacement switch is 324-35972-000 set point is .1 inches of W.C. Booster fan needs to create a minimum of at least -.2 in W. C. as measured at the upper tap on inducer."

I believe to check for the -.2 in. W.C, I would tee into the upper hose with a manometer, but don't understand what the set point is all about.
Why are there two flex hoses instead of just one? Second tap is to allow air to enter the other side of the diaphragm, this enabling movement of the diaphragm?
This switch isn't bad - just need to learn how to confirm proper pressure is reaching this pressure switch and others.