grant combi 90 restart after ran out of oil

[oderuyter]

Complete novice. Ran out of oil just stuck 20litres in tank until delivery. Covers whole outlet from the tank. Still the grant 90 combi won't fire. Can't even find the right bit to bleed... Please help

 

[Burnerman]

Can you spot a flexible steel braided pipe that enters the burner unit itself?
If you can, crack open the end nearest the burner, and allow the oil to purge itself through the oil line by gravity. Keep a large cloth handy to soak up any spillage.
Post a pic if you're not sure.
John

 

[Terrywookfit]

Slacken the oil inlet connection on oil pump until oil is released.
You may then need to bleed from the pressure gauge connection. (The hex nut under the pressure adjustment screw).

20 litres will not last long.

 

[oderuyter]

Will loosen it off. I know 20litres won't last just hope enough to get me through until delivery on Tuesday. Only using for hot water, think it will last?

 

[oderuyter]

OK took the casing off the burn, this is what i was faced with, I tried to undo the pipe at the bottom, but uber stiff, should I keep trying?

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• oderuyter
• 29 Jun 2013
• 1

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[Burnerman]

NOT the one at the bottom of the red expansion vessel, I hope.....
Its the braided one with the coloured stripes at the bottom of the burner.
If that nut is ferociously tight, can you get to the other end of the flexy pipe and try to bleed from there?
John

 

[oderuyter]

thanks john - i can get to the other bit, bit that is a seriousheadache, i cant get it working properly, as its just spins, and it close to the wall. Grr, hopefully I can live on cold showers and the pressure of the delivery on tues will sort it all out. failing that, get the boiler guy out

 

[Terrywookfit]

The hexagonal extension with an allen screw is the vent point.

 

[oderuyter]

Thanks terry, clearly not enough pressure from the tank as I did try that and it did nothing - well oil delivery is due today so we will see then hopefully I can have a warm shower tonight and avoid the hot pans of water and a jug replacement

 

[oderuyter]

Left the valve open for about 45 seconds, nothing. Oil deliver been n gone. Tried reset, nothing..... Any ideas?

 

[Terrywookfit]

You need to reset the burner and bleed with the motor running.
It will bubble at first then squirt oil so be ready to close the vent or turn burner off.
It may be necessary to repeat this operation several times.

 

[oderuyter]

So press reset with the valve open?

 

[Terrywookfit]

Crack screw open a couple of turns and run burner. It may take afew tries.
Use a rag to catch oil.

 

[oderuyter]

ok - got it until it is spurting, but still nothing, no hot water, no exhaust, it kinda fires up - but nothing when turning the hot tap on in the house