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boiler overheating only when UFH mis running
- Thread starter Peppertack
- Start date
- Joined
- 30 Apr 2016
- Messages
- 8
- Reaction score
- 0
- Country
Sorry Tony, thats what I meant. Put in an ABV now on two loops. When we extend to 4, it may not be needed.
The number of loops is largely immaterial to the boiler.
The 'TRV' on the manifold can shut off the flow when the manifold gets up to temp, whatever the number of loops.
I'm sure an external bypass would help, but the facts remain that;
-the system boiler has an internal bypass
-it has apparently worked fine for 5 years
Therefore something has changed recently. It could be due to a number of things, perhaps the pump is not working properly, the internal BV has jammed, the flow temp NTC is defective.
But it isn't due to the number of UFH loops.
The 'TRV' on the manifold can shut off the flow when the manifold gets up to temp, whatever the number of loops.
I'm sure an external bypass would help, but the facts remain that;
-the system boiler has an internal bypass
-it has apparently worked fine for 5 years
Therefore something has changed recently. It could be due to a number of things, perhaps the pump is not working properly, the internal BV has jammed, the flow temp NTC is defective.
But it isn't due to the number of UFH loops.
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