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#1
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General questions about oil furnace
I have a vacation home in upstate NY that has a Thatcher oil
furnace.Recently it had a problem with firing up. It turned out that there was an air pocket in the line after a new oil line was run to the tank. I was not sure how to bleed it. There was a flathead screw on the motor assembly that I opened, and I did see a little air come out, but it did not help. Then I opened one of 2 hex type bolts on the top of the motor assembly, and that cleared the air pocket. I'm trying to familiarize myself with how the system works, so here are a few questions. 1) What are thses hex bolts for? Are they for bleeding or do they control oil flow? 2) Do the burners need adjusting, and how are they adjusted? 3) There is a Honeywell stack switch at the base of the flue pipe has been disconnected ( wires were cut) what was the purpose of this? 4) I have a Honeywell fan limit switch L498 that has an off-on-off, that has a high limit of 200 deg which is suppose to shut the system down if it gets too hot. Does this take place of the stack switch? Thanks |
#2
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General questions about oil furnace
Mikepier wrote:
I have a vacation home in upstate NY that has a Thatcher oil furnace.Recently it had a problem with firing up. It turned out that there was an air pocket in the line after a new oil line was run to the tank. I was not sure how to bleed it. There was a flathead screw on the motor assembly that I opened, and I did see a little air come out, but it did not help. Then I opened one of 2 hex type bolts on the top of the motor assembly, and that cleared the air pocket. I'm trying to familiarize myself with how the system works, so here are a few questions. 1) What are thses hex bolts for? Are they for bleeding or do they control oil flow? 2) Do the burners need adjusting, and how are they adjusted? 3) There is a Honeywell stack switch at the base of the flue pipe has been disconnected ( wires were cut) what was the purpose of this? 4) I have a Honeywell fan limit switch L498 that has an off-on-off, that has a high limit of 200 deg which is suppose to shut the system down if it gets too hot. Does this take place of the stack switch? Thanks Hit the local library for a book on domestic oil burners. Some info: http://www.websterfuelpumps.com/trouble.htm The stack switch provided the flame safety circuitry; shut down in event of flame out/no ignition. It may have been replaced by a newer design, using a flame sensing photocell. Fan limit does not replace the stack switch. |
#3
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General questions about oil furnace
The stack switch provided the flame safety circuitry; shut down in event of flame out/no ignition. It may have been replaced by a newer design, using a flame sensing photocell. Fan limit does not replace the stack switch.- Hide quoted text - - Show quoted text - When I had the problem of no oil going through, it did shut down, and I had to hit a reset button to start it again, so its possible a photocell is now being used. Thats why I was concerned when I saw the stack switch wires cut, I thought somebody took a shortcut. |
#4
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General questions about oil furnace
Mikepier wrote:
I have a vacation home in upstate NY that has a Thatcher oil furnace.Recently it had a problem with firing up. It turned out that there was an air pocket in the line after a new oil line was run to the tank. I was not sure how to bleed it. There was a flathead screw on the motor assembly that I opened, and I did see a little air come out, but it did not help. Then I opened one of 2 hex type bolts on the top of the motor assembly, and that cleared the air pocket. I'm trying to familiarize myself with how the system works, so here are a few questions. 1) What are thses hex bolts for? Are they for bleeding or do they control oil flow? 2) Do the burners need adjusting, and how are they adjusted? 3) There is a Honeywell stack switch at the base of the flue pipe has been disconnected ( wires were cut) what was the purpose of this? 4) I have a Honeywell fan limit switch L498 that has an off-on-off, that has a high limit of 200 deg which is suppose to shut the system down if it gets too hot. Does this take place of the stack switch? Thanks The oil line is bled by a fitting on the oil pump that resembles an automotive brake bleeder. Use a 7/16" wrench on the nut with a hose to a container. Loosen the nut, start the burner, and when the line clears of bubbles, tighnen the fitting and the burner should fire. |
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