Recent content by JohnOfChelmsford

@old duffer - you're a legend for taking time to post that Mira fix - had the exact same issue for a loft shower, and drilling a hole the opposite side as suggested sorted it, just as parents were over to stay, who discovered it was nearly flooding as so slow to drain! Had actually been using...

that would be great if the case. I'll just have to give it a whirl and see. Would be nice if the boiler had explicit control for this or even a 'soft start' option which would heat slower but quieter.

Hi - yep, i think you've confirmed that there's no set-back function with this boiler's implementation of WC and what you've done with the controller is clever. It does seem bizarre to me that this isn't available. I'll consider WC now as i can set up the same 'dead switch' style arrangement...

@mrbg07546 It's stated as an "Integral, variable speed high efficiency circulation pump". Documentation is a bit vague as it initially only mentions it's variable based on "Outside temp" so you could read that as only when using Weather comp. But there is a section to describe how you change...

Thanks - I had tried pump speed limiting option (75% max speed down from 100) which didn't seem to address noise i was hearing. I suppose i can just give range limiting a go and see if it causes any issues. My hunch is the noise that bugs me is the fan when at 100%. If this cycles down to...

Hello, Would range rating a modulating boiler serve to reduce start-up\operational noise? I have a new 050-w 30KW Viessmann and one of the slight disappointments is that it makes more noise than the outgoing potterton 33 promax it replaced. To qualify, it's not making unusual noises, just...

Read thread with interest as I've just had a Viessmann 050-w 30KW combi installed. I'm considering WC and as i understand it from the supplied manual, you can have an on/off stat connected too (not opentherm). So as @tech749 describes, this external hookup can be used to override what WC is...