Hi,
I'm hoping that someone can give me some reassurance that my Evohome config has suitable bypass.
Recently had an Evohome system installed in what I believe is an S-plan config (a single 2-way valve controlling flow to the hot water only, flow is "always open" to the radiators). I have a boiler and DHW relay fitted and HR92s on all the radiators. Based on those parts of the system I can get access to, I think the house plumbing and Evohome installation is configured as in the image below.
MyPlumbing-EvoHome-Diagram.jpg
I have been keeping an eye on the timings of HR92 opening/closing, when the boiler, boiler relay and water pump turn on and off. From what I have observed, the sequence is as follows:
- HR92 opens, Boiler relay on/boiler on, pump on, HR92 closes, boiler relay off/boiler off, and finally pump off (a minute or two later). As the pump appears to stay running for a period after the HR92 has closed I wanted to check if I've anything to worry about!
I'm no expert, but there appears to be a by-pass circuit immediately above the boiler - see photo below - so I believe that this should be sufficient?
BoilerPiping-sml.jpg
Before Evohome, none of the rads had TRVs (all were manual valves). At the moment, I have removed the HR92 from the bathroom radiator and manual left the valve "half open" to ensure that I have sufficient by-pass circuit whilst I clarify if I have an issue with the current config.
Can anyone confirm that bypass is sufficient given the configuration - and so I can happily re-fit the HR92 to the bathroom radiator without anything to worry about! Or is there something I need to check?
For info, I have a Potterton Suprima 70L boiler.
Thanks, J.
I'm hoping that someone can give me some reassurance that my Evohome config has suitable bypass.
Recently had an Evohome system installed in what I believe is an S-plan config (a single 2-way valve controlling flow to the hot water only, flow is "always open" to the radiators). I have a boiler and DHW relay fitted and HR92s on all the radiators. Based on those parts of the system I can get access to, I think the house plumbing and Evohome installation is configured as in the image below.
MyPlumbing-EvoHome-Diagram.jpg
I have been keeping an eye on the timings of HR92 opening/closing, when the boiler, boiler relay and water pump turn on and off. From what I have observed, the sequence is as follows:
- HR92 opens, Boiler relay on/boiler on, pump on, HR92 closes, boiler relay off/boiler off, and finally pump off (a minute or two later). As the pump appears to stay running for a period after the HR92 has closed I wanted to check if I've anything to worry about!
I'm no expert, but there appears to be a by-pass circuit immediately above the boiler - see photo below - so I believe that this should be sufficient?
BoilerPiping-sml.jpg
Before Evohome, none of the rads had TRVs (all were manual valves). At the moment, I have removed the HR92 from the bathroom radiator and manual left the valve "half open" to ensure that I have sufficient by-pass circuit whilst I clarify if I have an issue with the current config.
Can anyone confirm that bypass is sufficient given the configuration - and so I can happily re-fit the HR92 to the bathroom radiator without anything to worry about! Or is there something I need to check?
For info, I have a Potterton Suprima 70L boiler.
Thanks, J.
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