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Post by rocketmanbkk on Feb 19, 2019 17:12:23 GMT
Ground floor flat, econ 7, hot cylinder with large cwsc above, overflow dripping when hot water on, cwsc gets warm.
I’ve turned stat down to 55 from 70 to see if that helps.
Spoke to Tom
Another other thoughts?
Cheers.
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Plumb
Feb 19, 2019 18:59:35 GMT
Post by jcplumb on Feb 19, 2019 18:59:35 GMT
So no coil to be passing, immersions(s) only..
My guess is a mixer tap/shower passing. Ask them if they've had any new taps or any plumbing work done recently.
If you hadn't mentioned that the cwsc heats up I'd think part 2 not closing but the fact it's warming up means water's coming up the feed/expansion imo.
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Post by rocketmanbkk on Feb 19, 2019 19:07:43 GMT
Only taps are pillar taps in bathroom & kitchen, electric shower, immersions only.
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Plumb
Feb 19, 2019 19:24:12 GMT
Post by battle1066 on Feb 19, 2019 19:24:12 GMT
I've had a twin immersion system fail with one element stuck on causing the tank water to overheat.
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Plumb
Feb 19, 2019 19:33:36 GMT
Post by dickpuller on Feb 19, 2019 19:33:36 GMT
On the cheap tariff wired to the lower element, the complete cylinder will heat & therefore needs lot of expansion, hence the header tank heating up. Try dropping the water level in the header tank along with the thermostat setting adjustment. I think it’s expansion water that’s overflowing.
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Post by rocketmanbkk on Feb 19, 2019 20:13:28 GMT
I should add as I’ve just found out, they never use the econ 7, only the boost. The boost is also situated in the lower third of the cylinder.
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Post by rocketmanbkk on Feb 22, 2019 8:57:05 GMT
I’m changing the stat next Tuesday
I’ll report back
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Post by rocketmanbkk on Feb 26, 2019 12:34:23 GMT
Swapped the stat today
See if it regulates the temp
Cheers all
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