Heating system help
Discussion
Morning,
We recently had a Worcester boiler, an Albion Ultrasteel unvented cylinder and Salus control unit fitted. This morning I woke to find hot water discharging through the tundish. Does anyone know what may cause this and if it is OK to keep the heating/water on.
One thing of note. There is an electric supply to a dual stat, tis was on last night with the temp set to 55C. I'm thinking this may have caused an over heating.
All help appreciated.
We recently had a Worcester boiler, an Albion Ultrasteel unvented cylinder and Salus control unit fitted. This morning I woke to find hot water discharging through the tundish. Does anyone know what may cause this and if it is OK to keep the heating/water on.
One thing of note. There is an electric supply to a dual stat, tis was on last night with the temp set to 55C. I'm thinking this may have caused an over heating.
All help appreciated.
Is there a sticker/instructions about how to regenerate the air bubble in the unvented cylinder? They need an air bubble to accommodate water expansion as the water heats up. If there's no air gap the safety valve opens to drain the water out via the tundish and reduce the pressure.
Edit: 55 deg C is not too hot. My tank thermostats are at 60 deg C to ensure no nasties can grow.
Edit: 55 deg C is not too hot. My tank thermostats are at 60 deg C to ensure no nasties can grow.
Water discharging is not a good sign.
Usually cause by over heating or over-expansion.
Likely causes are a failed control stat, which would lead to over heat or depending on cylinder set-up a failed expansion vessel or loss of expansion gap inside the cylinder.
The control stat should have a non self resetting energy cut out device, so if an overheat did occur, you would physically have to reset it to get it to work again.
If the vessel has failed (providing it has one fitted) replacement is the only cure, as a diaphragm inside the unit usually ruptures leaving no room for expansion.
If it is the type of cylinder that uses and air gap in the cylinder for expansion. Simply draining and refilling the unit will re-establish the air gap.
Usually cause by over heating or over-expansion.
Likely causes are a failed control stat, which would lead to over heat or depending on cylinder set-up a failed expansion vessel or loss of expansion gap inside the cylinder.
The control stat should have a non self resetting energy cut out device, so if an overheat did occur, you would physically have to reset it to get it to work again.
If the vessel has failed (providing it has one fitted) replacement is the only cure, as a diaphragm inside the unit usually ruptures leaving no room for expansion.
If it is the type of cylinder that uses and air gap in the cylinder for expansion. Simply draining and refilling the unit will re-establish the air gap.
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