1979 Carrier oil furnace,

[makolber]

see also

Mark

[micky]

Thanks for the two urls. I'll reply after I see them. This is what it says now.

"Our site is currently undergoing planned maintenance.

Starting Thursday 9PM EST through Sunday (Sept. 12th - 15th), due to the Annual US and Canada Trade price adjustment.

Any orders may be placed by email or fax. Emergency orders can be called into Customer Care during regular business hours.

The site will be available again on Monday, September 16th. "

I wonder what year that means.

And what is the Annual US and Canada Trade price adjustment, and why does it take 3 days?

Grin.

[trader_4]

ARE DEFEATING ONE OF THE SAFTEY FEATURES.

r the burner the entire time it is running and turn it OFF if the flame goe s out. One purpose of the saftey is to prevent a situation where the burn er continuous to run when the flame is out. This pumps oil that is not bur ned into the box. The oil is not burned and accumulates in the box. If an exceesive amount of oil accumulates in the box, the next time the burner i s started the ignition can set off ALL THE ACCUMULATED OIL AT ONCE. You ca n understand why this is bad. Do not defeat the saftey.

That was what I said a few days ago. IDK what exact control he has, what he's doing, etc, but it sounded like he was probably bypassing at least some of the safeties. Without carefully analyzing what energizes the relay, you don't know that some of the safeties rely on opening that rely to stop the furnace.

Like you say, I would do it for testing, emergency while monitoring it. But not for an extended period, unmonitored, etc. An oil deliver is $750+ isn't it? I thought he said he had a spare control, that he could buy one for $75, etc. I don't understand all the fiddling.

e flame. If the flame is out, the saftey switch heater get energized and a fter a time delay the saftey switch turns off and this turns off the curren t to your realy which is K1 on the diagram.

tey switch. The current to initially pull in K1 flows thgh the saftey swit ch heater. Thus something may be wrong with the saftey, and it prevents th e controller from starting. It is a fail safe desgn and if you press in th e relay by hand, you are defeating the fail safe.