Which nut to bleed heatslave 12/18?

[gjb]

Need to bleed the boiler heatslave 12/18. Has a nut above threaded pipe and one below, which one do I loosen.

 

[SimonG]

Going to have to give a few more details than that.

Oil pump?

 

[SJB060685]

What are you trying to bleed?

 

[Tea-Break]

Need a photo, for more help.........

 

[gjb]

Need a photo, for more help..

What are you trying to bleed?

It is an oil fed Worcester boiler, ran out of fuel so air is in the system.

 

[SJB060685]

What burner is it and which pump? Believe a couple are used

 

[Tea-Break]

So you’re asking how to purge the oil line?
12/18s use the Riello RDB Burner. I suggest you first check the filters are clean and free from debris (especially if you have a steel tank).
Then remove red plastic cover from burner, held on by two screws with captive nuts.
This will expose the fuel pump extreme right, attached to motor. You should see an extended brass hexagon nipple. Use a 4mm Allen Key to remove the plug, once removed
observe for a few minutes until fuel and bubbles appear, replace plug with Allen key.
Now press red illuminated button on control box.
Under no circumstances touch the screw on the pump itself below the hex nipple.

 

[SJB060685]

Are you sure all 12/18 use the RDB Tea Break? I swear one of my manuals says otherwise, perhaps I'm wrong. Anyway OP as Tea Break says whenever you run dry on oil you need to check strainer at tank and any inline filters as crud will have been drawn in to the line. I was going to say this if he responded to my question. If it is a Riello burner then do as told but again DO NOT mix up or fiddle with pressure adjusting screw, do this and the burner will need to be set up again using gauge and FGA, something you don't have or know how to do.

 

[Tea-Break]

SJB you have a point. WB did use Sterling’s in their early Down Firing boilers.
OK back to my previous advice, OP you need to post photos.

 

[SJB060685]

Yes I just looked up the manual. Pre 2012 they used the Sterling burner in 12/18 and 18/25 downfiring models, as well as the RDB.

 

[Dan]

Removed urgent prefix. 🧐

 

[SJB060685]

What was removed Dan?

 

[gjb]

Many thanks for your replies, just slackened of threaded tube in the end until spurted oil..did the job