Is multi fuel stove without vent dangerous

[Ltec]

Could be a thermal store. The pump to the right is I guessed for to rads and just noticed writing on switch confirms that.
So could be stove primaries to the left, (maybe direct connections) and direct flow and return to rads on the right of cylinder.
Mains is perhaps going into an internal transfer coil for hot out. Vessel is misleading as it might be just for the mains pipework, not the cylinder.
If I guessed correct, then seems the plumber messed up with poorly done gravity piping layout for stove and added the other red pump and plugged the stove vent. Unbelievable!

The new plumber wants to move the cylinder into attic and make it work on gravity. I take it you agree with him.

The rep said gravity is no good now for the amount of power stoves is putting out and the pump works better as it agitates the tank.

 

[Ltec]

The top left is feed from stove, bottom left with pump is return. When tank gets to 70 degrees it pumps water to rads to cool it down and stove brings it up again and repeats cycle to heat rads but it's rubbish and doesn't put out enough heat

 

[ShaunCorbs]

What's your kw rating of your stove ?

 

[Ltec]

What's your kw rating of your stove ?

20kw
4 to the room and 16 to water I think.

 

[Best]

The new plumber wants to move the cylinder into attic and make it work on gravity. I take it you agree with him.

The rep said gravity is no good now for the amount of power stoves is putting out and the pump works better as it agitates the tank.

Is the stove on same floor level as the cylinder? Like in a bungalow? The cylinder would need raised very high and not ideal. Really needs in a higher floor, but if attic is the next level, then I wonder how is that thermal store fed, as tank supply has to be much higher than the unit.
A combination thermal store has its own built in supply tank and is more suitable.
Gravity pipes should work well if done correctly. And I wouldn't use 90 degree bends where possible and just machine bend every bend on the primaries.
I hope the primaries don't have a long run?

 

[Ltec]

Is the stove on same floor level as the cylinder? Like in a bungalow? The cylinder would need raised very high and not ideal. Really needs in a higher floor, but if attic is the next level, then I wonder how is that thermal store fed, as tank supply has to be much higher than the unit.
A combination thermal store has its own built in supply tank and is more suitable.
Gravity pipes should work well if done correctly. And I wouldn't use 90 degree bends where possible and just machine bend every bend on the primaries.
I hope the primaries don't have a long run?

Yes it's a bungalow and cylinder is on same level. The return from tank to stove is actually lower at the tank than the stove. The stove hot side goes into attic/attic conversion and travels about 12 feet to outside the attic truss, it then travels 28 ft along the house all at a slight ride to probably 1ft maybe slightly more. That is where the pipe for vent has been cut off from above and it then seems to drop straight down that foot again and comes across trusses about 10ft before dropping into tank. I think all bends are 90 degree bends

 

[Ltec]

It's a fitted 90 degree where it comes up from stove. A 90 degree bend at end of 12ft and a fitted t at the end of 28ft.
There is a header tank or something above attic truss with 4 pipes going in and a plastic 5th probably over flow.

 

[Best]

That is a fairly long run, but not extreme.
The return connection at the cylinder would have ideally needed to have been at height of the stove or near it at a minimum. Sometimes that can be achieved by raising a cylinder on (needs substantial strong base, often fixed to supports from walls) to near ceiling level.
The return pipe itself can drop lower and only matters that it has a continual rise back to boiler.
Bends on the primaries should be machine bent where possible, or two 45 degree bends can be used.

 

[Best]

Often easier to take the time to bend pipes for a skilled plumber rather than have to attempt awkward soldering of elbows, which are in fact not as good as more restrictive