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Post by rocketmanbkk on Feb 2, 2021 20:22:46 GMT
So if you’ve got a pressurised heating system. Not a combi but a boiler, S plan to an unvented. Will it still work if the pressure drops to zero or very low? How low would work?
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Post by dickpuller on Feb 3, 2021 6:48:35 GMT
Usually a sensor on a system boiler fr low pressure, and at least a high limit stat on a Heat Only.
Ive fitted Intergas boilers, sealed the system & run them at a very low pressure .5Bar 👍
Intergas boilers are the ballocks!!
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Post by crowsfoot on Feb 3, 2021 7:10:23 GMT
I wouldn't normally expect to work at zero rocky, it could work at under 1 bar, though it's going in the wrong direction.
Have you got one working at zero?
I'd suspect a faulty gauge as the starting point if it is.
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Post by rocketmanbkk on Feb 3, 2021 8:17:07 GMT
I wouldn't normally expect to work at zero rocky, it could work at under 1 bar, though it's going in the wrong direction. Have you got one working at zero? I'd suspect a faulty gauge as the starting point if it is. No. Not at zero but about .2 bar. |
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Post by crowsfoot on Feb 3, 2021 16:28:17 GMT
That's a very low pressure for a modern boiler to keep working at.
Could it be an old boiler that was vented when it was fitted then had the header tank replaced with an expansion vessel at sometime due to issues?
This would explain how it still works at such low pressure.
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Post by dickpuller on Feb 3, 2021 18:46:32 GMT
The lowest setting on any boiler pressure switch varies, it depends on the boiler. Plus, boiler pressure switch or low pressure switch can get blocked up with shit & give incorrect readings.
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Post by rocketmanbkk on Feb 3, 2021 19:20:13 GMT
That's a very low pressure for a modern boiler to keep working at. Could it be an old boiler that was vented when it was fitted then had the header tank replaced with an expansion vessel at sometime due to issues? This would explain how it still works at such low pressure. No, it’s about 12 months old apparently. WB heat only |
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Post by pb on Feb 3, 2021 19:31:57 GMT
That's a very low pressure for a modern boiler to keep working at. Could it be an old boiler that was vented when it was fitted then had the header tank replaced with an expansion vessel at sometime due to issues? This would explain how it still works at such low pressure. No, it’s about 12 months old apparently. WB heat only I have seen WB running on 0 pressure rocky, I think baxi heat only kick out at 0.4 bar |
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Post by crowsfoot on Feb 3, 2021 19:32:26 GMT
Keep us posted rocky - I'm far from an expert on these new generation of boilers.
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Post by rocketmanbkk on Feb 3, 2021 20:11:51 GMT
Cheers everyone
It’s a bit of a mystery really. Something somewhere isn’t 100% but the system runs as it should. I’m not losing sleep over it, I’d just like to find the little issue.
I’ll report back
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