I need help... there are no service people working today and I have a problem with my boiler.... got oil in monday- had ran out completely. It was air locked. Got someone into fix it- they just needed to bleed it. I think they bleed it from the wrong screw (from what I've read up on)- vent is black outside, v. strong smell of oil. Won't come on even on the timer like it normally does- have to open it and press the black button to get it to start each time. Was Christmas so I just made do.... I'm worried this is not safe, especially with the kids.
I think the air pressure is off- and there is no one around to fix it. Can I do this myself (very step by step if you want to help with any instructions please!) - if not, is it safe to use it like this until next week when I can get someone in?? worried about the smell around the kids, and also could it explode??
Please give advice if you can.
(i have an indoor firebird 50/90 boiler that takes kerosene).
To avoid confusion you should disconnect the oil hose going into burner next time you have an air lock to bleed line.
Who ever has tried to bleed oil line has either messed up oil pressure or air settings. Its very had to describe how to reset over the internet with out the correct tools, an oil pressure gauge is needed along with a probe for testing combustion.
From the smell you could have a build up of oil inside the burner as its not set up right, not very safe to run. Unfortunately best advice I can give is to wait out until a service engineer can be found.
Items, a lot of what you say is sense, but then you tell someone to disconnect the oil line when bleeding the burner. You do not need to disconnect the oil line - you bleed the burner at an allen screw, or a bolt, on the oil pump. I do agree that someone has messed up the adjustments and that a service engineer should be called.
This is something I'm interesed in learning how to do, are you saying that we should disconnect the feed pipe (and let if flow till clear of air) and then re-connect, if so would air not get into the system while bleeding the line?
Nope, its with out doubt the best way to bleed an air locked oil line, you dont have to undo it fully, just crack it open until loose, move it about to break contact and allow some oil to flow out. Once you have a trickle its enough for the boiler to run, any air that might be still trapped in oil pump etc will pass out through nozzle on first fire.
Its tricky to locate the nut, you have to remove the burner cover, norm just two large flat head screws, then tuck yourself down to see the nut on the formed bend. I keep spanners for each type of hose, 12, 13 and 14, sometimes I've used 16.
Too much confusion happens with different types of oil boilers, a lot of people make a mistake by loosening the wrong nut to bleed oil line, then they mess up oil pressure or air which leaves boiler running incorrectly.
Beside the oil line inlet you might find another nut, its only a blank cap directly beside the burner oil line inlet nut. The space which is blanked by the nut is for installing a tiger loop should your oil tank be lower than boiler, in some cases loosening this nut can also bleed air out of oil line. I was given all these tip's from a great oil boiler service man, passed away since but like it do, thats the only way he removed air from oil line.
I never touch bleed screw, never even bother to look for it, always crack open line going into burner and never one single problem, been doing so for years.
Some times if a oil user runs out of oil regular, constant bleed calls, I fit a small solder tee on oil line with the dead end having a small bleed like you see on a rad, that way user can bleed oil line without touching the burner.
If your not so confidant, before breaking oil line at burner, shut off supply at fire check valve, small brass wheel head should be real close to burner, turn that anti clock wise until its free, it shuts off supply, then crack nut at burner open, turn supply back on until you see oil flowing, shut it off again, tighten nut at burner then open wheel head by tightening down fully.
Air locks stop oil from flowing to burner, thats the problem, not air in burner. Once oil can flow, the burner takes care of the rest.
I really find it amazing that someone can write so much and not say anything.
The air gets trapped in the oil pump. The oil pump cannot pump air, so you open the bleed screw and release the air - you do not need to open the oil line.
You just refuse to take in the info Jim thats all.
Honestly I've done this a million and one times over. The reason why oil boiler wont come on in this case is down to no supply of oil (no movement) not air in burner or oil pump.
By cracking the nut at burner, million and one times you'll remove air thats trapped in oil line not burner.
Oil is trapped in the line first, that is where the problem stems, not in the burner.
When you crack open the nut at the end of oil line, air will come out which proves its the oil line thats full of air not the burner.
Any air in the burner is minimal and the power of suction created by oil pump activating will remove any minimal amount of air all by it's self.
You dont have to use the bleed screw, cracking the nut at the end of oil line is doing the same job only better, saves all kinds of hassle.
Have to of made it out in a way for you to understand, try it for yourself next time and I'll bet you'll never bother spending the time to find the correct bleed screw. You should be thanking me for the advice, not criticizing everything I say.
I know that I should ignore you, but I'll try one more time. This is a DIY forum. This is something that a competent householder can do.
I'll try to explain this simply. Unless it is a case where the user gets very little oil, or if the tank is very low compared to the burner, you do not need to open the oil line and have oil all over the place.
Scenario: Oil runs out and air gets into the pipe. Tank is filled - oil pushes air as far as it can. Air rises to highest point - oil pump (which cannot pump air). Loosen bleed screw on oil pump - air immediately escapes - barely a drip of oil, which is caught on cloth. Press button - burner starts.
I'll stick with my way, thanks for advice. Still waiting for answers to those questions I've put to you. Your constant criticism will now on be ignored until those questions are answered. I've no problem answering yours so its only fair.
have to agree bleeding from the oil pump via the screw is the best option thats why its built into the pump .
Only problem is sometimes people mistake the pressure screw for the bleed one and you end up with issues like the one above.
That's why I always suggest not to go near any of the adjustments on burner, people get confused very often and mess with oil and air pressure. I've had dozens of calls from people with a simple air lock, I mention how cracking open supply at burner a little, moving the hose to break seal until oil weeps out is more than enough have boiler running.
Burners are normally out side, in casings, dark and hard to see. Very easy to describe how to remove air over the phone by using the above method.
Try it for yourself next time, you'll be surprised.
items, I don't want a pissing match with you. The only question you asked was, why do the manufacturers hide the high limit stat. They don't.
Under the heading: 1- USER INSTRUCTIONS, there is a diagram and instructions on how to reset the stat - for useby the user
This is a manual for a common Grant boiler http://www.grantengineering.ie/userfiles/download_61.pdf
I've no probs at all, you seem to have the prob. Read up on posts, not sure where the questions are at this stage but their is a few questions in relation to high limit stat, not just one, still haven't answered them.
Again thats an installation and service manual, I've said it a dozen times, that manual should be left at boiler for a service person. When you buy an oil boiler you get two manuals, service and installation manual and separate easy to follow user manual, try and find a link with the actual user manual.
I'd like to see it for myself, I haven't been paying much attention to oil over the last few years as I've moved onto Geothermal, unless their has been a change in last few years that I am not aware of, high limit stat is not to be readily used.
No need, I've found it. Have a look at the link you provided, around page 30. That is the actual user guide to be left with user. All of one page, with a reference to only showing user how to reset boiler by either, high limit (over heat) stat or lock out reset button. In the manual Grant recommend only Oftec certified or Grant certified persons install or maintain their boilers. Giving that, they leave it in a way to cover themselves. If a certified person installed the boiler, chances of it locking out on high limit would be minimal and the user would be given correct details associated with risks when resetting boiler at high limit. In the actual user guide, the high limit stat is not as obvious as you make it out to be, same reason they haven't included a simple sticker to give information under the high limit reset button. If using high limit reset was to be used willy nilly as you suggest, it would be a lot more obvious in both user manual and at boiler.
That really makes a whole lot of sense to me indeed, I'm thinking of the situation where your tank runs dry and air is in the line, not deeper in the system or the pump. I'm no expert but this does seem very logical to me.