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Post by Deleted on Dec 26, 2017 18:01:02 GMT
You go out to a job and the Modern Worcester boiler keeps losing pressure,, you recharge it and it's holding pressure you then put the heating on and it drops pressure quickly, you check the PRV and it hasn't dumped  you recharge and isolate the flow and return and leave it until the next day, on your return the pressure has dropped but the customer says it dropped slowly. Where's it losing pressure and why and where is the system water going.? |
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Post by battle1066 on Dec 26, 2017 18:06:23 GMT
I think the internal expansion vessel has lost its charge - depressurise system leave system drain open and represserise the expansion vessel then close drain valve and recharge the system back to its normal pressure.
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Post by Deleted on Dec 26, 2017 18:07:35 GMT
I think the internal expansion vessel has lost its charge - depressurise system leave system drain open and represserise the expansion vessel then close drain valve and recharge the system back to its normal pressure. smiley-sad056 nay |
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Post by battle1066 on Dec 26, 2017 18:14:26 GMT
I think the internal expansion vessel has lost its charge - depressurise system leave system drain open and represserise the expansion vessel then close drain valve and recharge the system back to its normal pressure.  I would look at every radiator valve for tiny leak with toilet paper, if all is ok I would check every radiator that there getting hot all over - if one's not fully hot I would bled it then recharge. |
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Post by Deleted on Dec 26, 2017 18:19:12 GMT
You have a great thought process battle  but the boiler loses pressure when isolated from the system, we know the PRV isn't opening , we know the EV is ok . |
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Post by endfeed on Dec 26, 2017 18:25:47 GMT
Has the e.v got slight pin hole passing water into it?
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Post by battle1066 on Dec 26, 2017 18:27:26 GMT
You have a great thought process battle  but the boiler loses pressure when isolated from the system, we know the PRV isn't opening , we know the EV is ok . Small Internal leak on the gas to water heat exchanger. |
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Post by Deleted on Dec 26, 2017 18:28:10 GMT
Has the e.v got slight pin hole passing water into it? smiley-sad056 nay |
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Post by Deleted on Dec 26, 2017 18:29:20 GMT
You have a great thought process battle but the boiler loses pressure when isolated from the system, we know the PRV isn't opening , we know the EV is ok . Small Internal leak on the gas to water heat exchanger. Heat exchanger is cracked so where's the water going ? |
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Post by battle1066 on Dec 26, 2017 18:30:29 GMT
Small Internal leak on the gas to water heat exchanger. Heat exchanger is cracked so where's the water going ? In the exhaust gases and out the flue |
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Post by Deleted on Dec 26, 2017 18:31:54 GMT
Heat exchanger is cracked so where's the water going ? In the exhaust gases and out the flue smiley-sad056 nay |
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Post by Deleted on Dec 26, 2017 18:33:05 GMT
Remember it was losing when boiler wasn't active, it only has one root now |
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Post by battle1066 on Dec 26, 2017 18:35:39 GMT
In the exhaust gases and out the flue Leaves the system via automatic air vent |
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Post by Deleted on Dec 26, 2017 18:37:00 GMT
Leaves the system via automatic air vent smiley-sad056 nay what do modern boilers have that old boilers don't ? |
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Post by battle1066 on Dec 26, 2017 18:41:57 GMT
Leaves the system via automatic air vent what do modern boilers have that old boilers don't ? Diverter valves. |
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you recharge and isolate the flow and return and leave it until the next day, on your return the pressure has dropped but the customer says it dropped slowly.
but the boiler loses pressure when isolated from the system, we know the PRV isn't opening , we know the EV is ok .
but the boiler loses pressure when isolated from the system, we know the PRV isn't opening , we know the EV is ok .