Hi,
Original system was a pressurised feeding the radiators and hot water tank. Then...
Plumber fitted thermal store, wood burner on top of existing gas system. Woodburner, open system attached to radiators and volume of thermal store. Boiler pressurised, flow and return into a coil in the thermal store + there was a rad 10 ft from the boiler that was across the send and return. All was working (although I do have a bit of an issue with balance of heat to the room vs water for the fire).
A to-do for the plumber was to take the radiator off the send a return (otherwise it would only be used when the boiler was firing), he came out and disconnected the rad from the send and return and put it onto the rad circuit.
From then, you set the pressure, the boiler fires, the pressure goes up to 3 bar, then over the next hour or so pressure -> 0. Next time the timer gets boiler to fire, insufficient pressure. Plumber says he doesn't do this boiler and doesn't know what is wrong - he has spent an hour or so on it.
So I have:
- emptied water and checked the pressure vessel.
- There is a left on Honeywell on the send or return next to the hot water tank. I was concerned that this may be in the off position - so opened the valve that sits between the send and return on a conventional system, but it did the same.
1) So just trying to remove variables and one is the flow / return valves at the bottom of the boiler - I've searched and can't see how these work, they have a screw that is tight. How can you tell if they are open / closed? I don't want to fiddle unless I know how they work.
2) Can someone walk me through the fault find.
Cheers,
Jason
Original system was a pressurised feeding the radiators and hot water tank. Then...
Plumber fitted thermal store, wood burner on top of existing gas system. Woodburner, open system attached to radiators and volume of thermal store. Boiler pressurised, flow and return into a coil in the thermal store + there was a rad 10 ft from the boiler that was across the send and return. All was working (although I do have a bit of an issue with balance of heat to the room vs water for the fire).
A to-do for the plumber was to take the radiator off the send a return (otherwise it would only be used when the boiler was firing), he came out and disconnected the rad from the send and return and put it onto the rad circuit.
From then, you set the pressure, the boiler fires, the pressure goes up to 3 bar, then over the next hour or so pressure -> 0. Next time the timer gets boiler to fire, insufficient pressure. Plumber says he doesn't do this boiler and doesn't know what is wrong - he has spent an hour or so on it.
So I have:
- emptied water and checked the pressure vessel.
- There is a left on Honeywell on the send or return next to the hot water tank. I was concerned that this may be in the off position - so opened the valve that sits between the send and return on a conventional system, but it did the same.
1) So just trying to remove variables and one is the flow / return valves at the bottom of the boiler - I've searched and can't see how these work, they have a screw that is tight. How can you tell if they are open / closed? I don't want to fiddle unless I know how they work.
2) Can someone walk me through the fault find.
Cheers,
Jason