Oil Burner Wont Work Without Return Line

dinows

I am putting in a new oil tank in my cellar to replace the outside buried tank. The burner is 2 line intake and return. I plugged the return to start the process but now the burner will not fire. Open the bleeder and it fires, close the bleeder and it stops. The new tank in the cellar has just one line coming from the tank and filter. Have seen lots of setups where only one line comes from the tank, why wont the burner fire with just one line ? Thanks

Hooked the return back up and it works

Jamie Hall

The burner has to be reconfigured for one line operation — best left to someone who really knows how to do that.

EdTheHeaterMan

Most fuel pumps on domestic oil burners have an internal bypass. (There is a Danfoss model that does not. so unless you have a Danfoss pump you have a bypass in the pump). In order to make the pump operate on a 2 pipe configuration the installer of the pump must place a bypass plug in the internal bypass port of the pump.

If you are changing a 2 pipe system from 2 pipe to one pipe, someone MUST remove the bypass plug from the internal bypass port. If you operated the pump with both the bypass plugged and the return port plugged, you have probably already destroyed the fuel pump seal. I would not be surprised if you now need a new fuel pump.

If the pump seal has failed, you may see oil dripping from the bottom of the burner housing.

HVACNUT

If you don't know to remove the bypass plug, it gets me wondering what else you don't know about oil burners. Care to post some pics of your work?

EBEBRATT-Ed

I also would be very surprised if the pump seal did not blow. Maybe some air in the pump air binding it saved it but if he opened the bleeder and fired the burner the seal is probably shot

dinows

There is not much to post for pictures, I merely disconnected the return line and put a plug in its place.

Now having said that, where is the by pass plug ? Thanks

dinows

Also like I said, I reconnected the return line and the unit is running fine, no leakes or issues

EdTheHeaterMan

What pump do you have

https://forum.heatinghelp.com/discussion/comment/1817802#Comment_1817802

it is different on the riello, suntec, webster, danfoss. But I guarantee it is inside the pump where you can't get to it unless you read the instructions for that particular fuel pump. Even different pump modes from the same manufacturer can put the bypass opening in different locations on different models.

You are not making this very easy for us to help you. Those pictures "that is not much to post" are worth a thousand words. But you are only up to about 150 words. 157 including the title, so you really have over 840 words left to get it right before you actually need to post any pictures.

Unless you actually need some help.

All I can say about this is that you are playing with fire. LITERALLY. That oil burner makes. a fire in your home and if you somehow make an honest mistake, you may be the topic of a news story on the 11 o'clock news. And no amount of savings on a professional repairman can be worth that.

Help us help you or call a professional. Don't hold back critical information. And if one of out seasoned professionals indicates that you may be over your head, I would think hard about their advice

How can you tell if someone might have a little experience and is worth listening to? OR If someone is new to this Forum

Just look at the numbers

HVACNUT

https://forum.heatinghelp.com/discussion/comment/1817802#Comment_1817802

Awesome.

dinows

Well maybe I will just feed the return back into the new tank, save me a lot of heartache. Isnt there a special 2 inch tank cover that you can run the return copper tube into. Obviously you cant just let the copper dangle in the open bung hole. Anybody know the name of the part I need ?

EBEBRATT-Ed

#14468 R W Beckett duplex tank bushing available at Supply House.com.

It will have connections for 2 oil lines . Just put a plug in the one you don't need.

dinows

Thank You

HVACNUT

Are you going to sleeve it at the double tap bushing, or do flare adaptors and pick-up tubes?

EdTheHeaterMan

Can you at least type the model number of the fuel pump on your oil burner? It should be on the actual pump somewhere. I will be glad to tell you where it is.

But I refuse to list all the bypass plug locations on each of these 15 pumps in this illustration or the hundreds of other pumps that you might have. Give m a little help if you really want to know where the bypass plug is.

After you help me help you. you might write something like this about me.

Grallert

You'll need to identify your pump first of all. With that knowledge you can then find the location of the bypass plug and the tool needed to remove it. Remember to replace the outer plug. Now you pump id single pipe.

You could also leave it as two pipe and install a tigerloop ultra eliminating the return line and all the oil that get moved through it and the filter extending the life of the filter. That would be my choice.