Worcester heatslave 15/19 regular lockouts after new oil tank

[OliverK]

Dear all,

I'm hoping someone can offer me some advice .

I have a Worcester heatslave 15/19 oil boiler . Three weeks ago we had our external oil tank replaced due to the previous one having cracks.

The new install all went fine and the boiler worked as usual for several days until it locked out. I guessed air was in the line so I loosened the larger "p" screw on the oil pump , no oil came out unless I turned the boiler on and pressed the restart button. Once I'd done that oil spurted through and the boiler woul run for a day or two until it would lock out again so I repeated the process several times however the problem returned each time after 1-4 days.

Today I decided to check the filter next to the external oil tank which all seemed pretty clean. I then checked the filter on the pump in the boiler and again it all seemed pretty clean.

I decided to undo the oil supply to the pump to run it through to make sure the flow was good and clean.

My question is when I turn the oil valve back on inside the boiler should the oil spurt out the hose or would it be a constant bit low pressure trickle ( when I open the bleed valve no oil comes out unless the pump is going)?

The hose and boiler are probably a foot higher than the external oil pipe which also goes in via the fire valve just outside the house.

I could just be being paranoid and need to keep on bleeding the pump every few days.

Nothing else on the boiler has been touched apart from the window sensor which appears to be clean and seated correctly in the housing.

Any advice would be appreciated.

Thanks

Oliver

 

[Terrywookfit]

Is the oil level higher than the pump.
Think GRAVITY..

 

[OliverK]

Yes it is which is why I'm guessing the oil on comes out as a trickle from the pipe and only comes through properly when the pump is working.

I'm guessing there must be some kind of blockage somewhere as the boiler always restarts after pressing the lockout reset 1-5 times and it makes all the right sounds.

My question is what to check other than the filters?

 

[cozzmic]

Is the new tank a top outlet type or bottom outlet? Easier to take off flexi hose and discharge into bucket if bottom outlet so it runs freely. If top outlet you will need to pump though oil first and check for non return valve. Reconnect and bob's your uncle after a couple of resets.

 

[OliverK]

The tank in the garden has a bottom outlet.

The boiler and pump are a foot higher than the lowest part of the oil pipe coming from the garden to house and boiler.

If anyone out there has fitted a new oil tank did you have to bleed the oil at the oil pump a few times over several days?

 

[Terrywookfit]

What is the oil level in the tank compared to burner height.

 

[OliverK]

The Oil level is well above the burner height...probably three feet higher but 25 yards away.

 

[Burnerman]

With that sort of gravity you should get a good flow of kero to the burner.....check all valves and filters again (including the fire valve.)
I have to say, oil pumps don't like being locked out and reset for more than a couple of tries.
John

 

[OliverK]

Thanks John,

After cleaning all the filters and getting it going yesterday morning it hasn't locked out again so for the time being I'll leave it alone and post any updates if things go pear shaped!

 

[OliverK]

Just an update to anyone every encountering a similar problem to me. After a couple more lockouts the boiler refused to restart so I bit the bullet and called the engineer out who fixed it within 30 minutes.

The capacitor on the fan had given up and he also changed the solenoid on the pump and all now seems to be working....fingers crossed .

Thanks for all your comments.

Oliver