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-   -   Which beckett burner do I need. (http://www.diychatroom.com/f17/beckett-burner-do-i-need-61622/)

jmhai 01-11-2010 04:34 PM

Which beckett burner do I need.
 
Hello.

I want to upgrade my old Lennox furnace w/ burner with a new Beckett oil burner. I don't know which one I need to buy? Can someone tell me which one I need or how to figure it out? Here is what I have now.. Lennox furnace with orginal Lennox burner, it uses a honeywell RA116A primary Control (Stack Switch) which is one of the main reasons for the upgrade. thank you for any help..:)

Model # OH7Q-105C
Max Bonnet 84,000 btu/hr
Max firing rate 0.75 GpH
Oil Burner OHP30-8
Draft 0.03

I have a heat pump and use the oil furnace as emergency/secondary heat...

beenthere 01-11-2010 04:44 PM

You need to measure the length of the blast tube you will need.

A AGF is what you'll want.
Probably be able to down fire to a .65 nozzle.


I would consider getting a new, cheap Olsen oil fired furnace.

While you only use it for aux. A new furnace will have a better blower for your heat pump. And come with a beckett burner.

The improve air flow will be worth it.

jmhai 01-11-2010 05:01 PM

Quote:

Originally Posted by beenthere (Post 380986)
You need to measure the length of the blast tube you will need.

A AGF is what you'll want.
Probably be able to down fire to a .65 nozzle.


I would consider getting a new, cheap Olsen oil fired furnace.

While you only use it for aux. A new furnace will have a better blower for your heat pump. And come with a beckett burner.

The improve air flow will be worth it.

Did you mean a AFG.... I will think about the Olsen unit, but my Service guy said the insides of my Lennox look great and the only down side being the old burner and stack switch.. Thanks again for your help..

beenthere 01-11-2010 05:10 PM

Yeah. I meant AFG.

Your old furnace probably has fairly large passage ways. So it won't get as good of an efficiency as a new one will.

Smaller passage ways give you heat quicker. And lets less heat go up the chimney.

So it could be a considerable amount of oil you save with a new, properly sized furnace.

tk03 01-11-2010 06:48 PM

Back in the 70's I did many conversions with new oil burners. We always down fired slightly due to higher flame temps. Many of those jobs failed the heat exchangers and combustion chambers in about 3 years on furnaces. Boilers lasted longer due to water behind the iron. My guess is more expansion of the metal and long term fatigue of the chamber at lower temps.

jmhai 01-11-2010 07:49 PM

Quote:

Originally Posted by tk03 (Post 381084)
Back in the 70's I did many conversions with new oil burners. We always down fired slightly due to higher flame temps. Many of those jobs failed the heat exchangers and combustion chambers in about 3 years on furnaces. Boilers lasted longer due to water behind the iron. My guess is more expansion of the metal and long term fatigue of the chamber at lower temps.

You recommend a new furnace too.. Are you saying the bricks break and come apart or the metal behind warps or both happens..

yuri 01-11-2010 08:42 PM

Heat exchangers can crack from old age, expansion and contraction, brittleness and oil burners CAN and do produce CO just like gas burners. I would listen to them and buy a new furnace, Impossible to predict when an exchanger will split.


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