Oil boiler on lockout after new motor fitted

[Ashtara]

Well surprise surprise, locked out this morning. Reset worked fine as usual.

Have had enough now - want a new boiler (current engineer is Thermacom one - rang GAH and checked) so he knows his stuff.

Not a happy bunny

 

[Burnerman]

Oh doom
The problem is, even if a new boiler - or burner - is installed, and the fuel supply hasn't been perfected, the old problems will remain.
I still think the problem is air being present in the oil supply in the morning, maybe being due to a certain amount of drain back during the night.
Just for your own sanity - if you have any remaining - would leaving the boiler cutting in during the night to boost the hot water help at all?
John

 

[Ashtara]

How do we stop the drain back though?
I thought the tiger loop removed the air does it not?
Will ask them to check the oil pressure on line again.

Just so frustrating.

 

[Burnerman]

The tiger loop is to prevent foaming of the fuel, but yet another of my theories is that fuel is being allowed to run back down the pipe during the night, or other periods of inactivity.
The other often voiced opinion is that the oil line still isn't air tight.
My comment about the burner running occasionally during the night may prevent the faff that you have in the mornings, as the fuel hasn't had time to drain back.
The thing is, Premila, you've had all this work done and the thing is still the bloody same.....pardon le French!
John

 

[Ashtara]

I know tell me about it - there must be something wrong but just can't pinpoint it. What is causing oil to drain back? It's such a mystery.

I will be speaking to engineer tomorrow.

The oil line pressure was checked on Wednesday and nothing was found then. I am still wondering whether the oil line is too long. Thing is there is always oil in the tiger loop. I always check the when I reset it.

 

[Norcon]

You want too disconnect the oil feed and hook up a temporary gravity supply.
Hang a 5 gallon container off a sky hook or something like that.
Should have done that at the beginning before throwing parts at the appliance.

 

[Burnerman]

I think thats a fairly sensible option - after all, nothing has sorted this thing yet.
I don't think its necessary to have a gravity feed yet - just a supply that is lower than the boiler will do, and nicely close to it. In this way, if the thing behaves, its down to the oil supply.....if it doesn't then there is still a problem within.
If the low down supply proves troublesome, then a gravity feed should make a difference - with a slight pump modification that is needed.
John

 

[Tipper]

I've been retired a few years now but having read this thread all through again there are a couple of suggestions I would make...

Firstly I note the oil pump has been changed a couple of times, but is the correct pump fitted? I say this because I too had extreme trouble with this burner on a wall mounted bolier and eventually discovered that the wrong pump had been fitted previously by someone else and when I changed the pump I compounded the error by simply replacing what I took off as most guys will do! I can't remember the details now but it should have been right rotating (-R) and a left rotating (-L) was fitted or vice versa. Lesson well learnt!

Secondly do they still need the bypass screw removing/inserting on the Danfoss pumps. Is it there/not there as appropriate to its piping arrangement?

And finally, get your engineer to fit a new burner complete on a 'sale or return' basis to see if it's a burner or fuel supply problem. They only cost a few hundred pounds and it may well solve the continual problems once and for all. Actually a new burner complete is cheaper than the sum of its spare parts. I carried a couple of popular makes in my van and used them either whole or for spare parts as needed.

 

[Norcon]

Wonder if its been sorted yet or if the op has just went insane?

 

[Burnerman]

This was concluded in another section (can't remember which).
Ashtara had a new boiler fitted - a Grant - and its been quiet since!
John

 

[holty]

all good till it starts loosing pressure after a year. loosing count of either a leaky filling loop valve, prv or fooked expansion vessel i change. problem is, still the best of a very bad bunch. hear worcester are bringing out an new version. hopefully one you dont have to dismantle the casing etc to service the thing

 

[Boilerman2]

Hi Holty - you seem to view the boiler market the same as me!
have a look at Hounsfield Boilers we are starting to install these in place of the Grunt - he does not do system or Combi boilers as he rightly says the EV is never correctly sized and installers generally don't check the capacity required - but for floor standing or wall hung standard boilers he is your man!

Google Hounsfield Boilers for details

 

[Ashtara]

Me again.
Well I had a new grant boiler fitted in June 2013 and it worked great for 2 years.
Alas it started locking out in October 2015. A grant engineer came and fitted a new control box and it worked until February 2016.
Grant checked the old control box and couldn't find any faults with it.
In February 2016 it locked out completely with no sign of restart(after 3 months). The transformer was then changed and it worked fine till this weekend (3 months)
Now my question is how can the new boiler have worked fine for two years if there was (as originally suggested) a fault with the oil line pressure?. Is it the oil line Or am I just really unlucky with boilers and my new boiler is once again playing up.

 

[halfway]

Is there a riello burner fitted to it. The new control boxes have a light sequence that goes a long way to identifying the fault.

Was there a combustion test done in last visit? Is there anything unusual about the site conditions?

I would like to be able to throw my eye over the whole installation and also have a look at oil pressure and combustion head after lockout.

With such long times between problems it is going to be very difficult to sort. Perhaps treat the whole setup as a recommissionn and take nothing for granted. Bon chance.

 

[muggles]

Me again.
Well I had a new grant boiler fitted in June 2013 and it worked great for 2 years.
Alas it started locking out in October 2015.

Well, you were advised to have a Hounsfield. You can lead a horse to water....

Seriously though, it sounds like you might be unlucky, or maybe you have an undiagnosed issue with your electricity supply. Do you have trip switches or are you still on fuse wire or cartridge fuses? I ask because older style systems can mask faults which might be paying havoc with the electrics on your boiler. Other than that, rig up the temporary oil tank above the boiler as previously suggested and see whether it cures the issue - that'll confirm or eliminate the oil line as a cause