Question on a Oil Bioler

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k9 Bara
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Posts: 498
Joined: Mon. Mar. 31, 2008 11:27 am
Stoker Coal Boiler: 1996 EFM 520 DF
Coal Size/Type: Buck / Reading
Location: Red Creek, Fair Haven area NY

Post Sat. Sep. 08, 2012 3:44 pm

Background. The boiler is a buderus G205, oil burner.
Went to father in-laws house to test fire the boiler, checking for issues before the heating season. A problem I did find. Long story short, I have line power going into the (White Rodgers 8B48A) high limit switch, (looks like an aqua-stat to me) but no power coming out to burner. The water is cold and should be calling for heat. Before I just ordered the new switch, any other guess's? Power comes from emergency switch, to the limit switch, from there to burner and circ pump.

Thank you,

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Rob R.
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Posts: 11498
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Sat. Sep. 08, 2012 3:48 pm

Try shorting the TT terminals on the aquastat and see if it fires.

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k9 Bara
Member
Posts: 498
Joined: Mon. Mar. 31, 2008 11:27 am
Stoker Coal Boiler: 1996 EFM 520 DF
Coal Size/Type: Buck / Reading
Location: Red Creek, Fair Haven area NY

Post Sat. Sep. 08, 2012 5:12 pm

Good call, I didn't do that. I was thinking the cold temp would automatically put power to the burner. But would be a quick test on it.

Thanks Rob.

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k9 Bara
Member
Posts: 498
Joined: Mon. Mar. 31, 2008 11:27 am
Stoker Coal Boiler: 1996 EFM 520 DF
Coal Size/Type: Buck / Reading
Location: Red Creek, Fair Haven area NY

Post Sat. Sep. 08, 2012 6:00 pm

Wha la... fired up. :doh: So...the boiler doesn't maintain a certain water temp? Fires on demand only? Hmmm...

Thanks again Rob... a beer for you sir! :cheers:


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Scottscoaled
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Posts: 2599
Joined: Tue. Jan. 08, 2008 9:51 pm
Stoker Coal Boiler: EFM 520, 700, Van Wert 800 GJ 61,53
Baseburners & Antiques: Magic Stewart 16, times 2!
Coal Size/Type: Lots of buck
Other Heating: Slant Fin electric boiler backup
Location: Malta N.Y.

Post Sat. Sep. 08, 2012 6:24 pm

Waaaahhhhhhhhhh! How come Robb gets to answer all the easy ones? Boo hooo :)

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coalkirk
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Posts: 4710
Joined: Wed. May. 17, 2006 8:12 pm
Stoker Coal Boiler: 1981 EFM DF520
Hand Fed Coal Stove: Jotul 507 on standby
Coal Size/Type: Lehigh anthracite/rice coal
Location: Forest Hill MD

Post Sat. Sep. 08, 2012 9:12 pm

k9 Bara wrote:Wha la... fired up. :doh: So...the boiler doesn't maintain a certain water temp? Fires on demand only? Hmmm...

Thanks again Rob... a beer for you sir! :cheers:
Yes, my son has the same boiler. His fires only on demand. The water almost never reaches what I'd consider normal operating temperature. His radiators get warm and then the system shuts down as the thermostat is satisfied. Seems weird to me but I'm used to trying to maintain a boiler temperature. Have to ask the Germans where it was built.

User avatar
k9 Bara
Member
Posts: 498
Joined: Mon. Mar. 31, 2008 11:27 am
Stoker Coal Boiler: 1996 EFM 520 DF
Coal Size/Type: Buck / Reading
Location: Red Creek, Fair Haven area NY

Post Sat. Sep. 08, 2012 10:36 pm

coalkirk wrote:
k9 Bara wrote:Wha la... fired up. :doh: So...the boiler doesn't maintain a certain water temp? Fires on demand only? Hmmm...

Thanks again Rob... a beer for you sir! :cheers:
Yes, my son has the same boiler. His fires only on demand. The water almost never reaches what I'd consider normal operating temperature. His radiators get warm and then the system shuts down as the thermostat is satisfied. Seems weird to me but I'm used to trying to maintain a boiler temperature. Have to ask the Germans where it was built.
Yeah, I was thinking that way. Was expecting it to fire to operating temp. Thank you for the help.

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