Rather than hijack the fine tuning controls thread I thought I'd start a new one.
I currently have 2 radiators without HR92s fitted so just latching the CH open and reconfiguring the BDR91 to boiler relay mode would then heat those radiators when just requiring hot water. Does anyone have any experience of using 3 BDR91s with an S-Plan system, i.e. one to boiler, one to CH, one to DHW?
In theory, that should allow use of the min run time and cycle rate settings and allow me to minimise short cycling, but will Evohome do anything different in terms of the CH / DHW and Boiler control relays, e.g. will it leave the CH valve open for a period of time after the boiler relay is off (and pump overrun is active)? I think it may do this with the hot water (overrun setting?) but what about CH?
I am just trying to determine whether its worth investing in another relay and I've seen this question asked a few times before on the forum with no definitive answer on how Evohome handles this config.
Thanks
I currently have 2 radiators without HR92s fitted so just latching the CH open and reconfiguring the BDR91 to boiler relay mode would then heat those radiators when just requiring hot water. Does anyone have any experience of using 3 BDR91s with an S-Plan system, i.e. one to boiler, one to CH, one to DHW?
In theory, that should allow use of the min run time and cycle rate settings and allow me to minimise short cycling, but will Evohome do anything different in terms of the CH / DHW and Boiler control relays, e.g. will it leave the CH valve open for a period of time after the boiler relay is off (and pump overrun is active)? I think it may do this with the hot water (overrun setting?) but what about CH?
I am just trying to determine whether its worth investing in another relay and I've seen this question asked a few times before on the forum with no definitive answer on how Evohome handles this config.
Thanks
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