Recent content by M51

@ianmcd Thanks for pointing that out Ian. Other than it not being a correct placement for the valve as per the C-plan standard, I'm not sure what the real world consequences are of leaving the valve where it is, do you know? It's actually been there for the last 20 years by the looks of it...

All rewired to the correct C-Plan scheme in a proper 10 terminal box and the Pumped/Gravity jumper on the controller set to Pumped. Now have independent control over heating and hot water. All working for the last 2 weeks without any issues and saving a fortune by not being forced to maintain a...

Ok, I think this thread is a bit messy with my incorrect diagrams and misunderstandings. I've realised that what I'm really asking in a nutshell is... On a C Plan installation is it acceptable to have the 2 way valve on the DHW return just before the boiler? I'm now guessing it is, as that's...

Thanks for the reply ericmark, Yes, from the hardware installed it does look like it should have the 3rd set of c plan wiring that you've shown, Your last comment about the 2 port valve on DHW is the thing that I'm concerned about. I realised that my diagrams didn't show the valve where it...

Ah, yes, you did mention "just add another 2 port valve" I didn't make the connection between that and S plan as I wasn't familiar with any of this until a week ago. Thanks very much for taking the time to look at this and provide your advice Chris, I do appreciate it. If anyone has advice on...

Yes, I thought plenty of scope for re-wiring too. But is the 2 port valve in the correct (safe?) place to allow for full c-plan wiring? The Honeywell Plan C Installation docs state... Valve - The zone valve should be fitted in the DHW primary circuit so that, when closed, it does not close off...

The "wiring center" is just a round 4 terminal junction box with the common E L N and the connection between the cylinder stat and the 2 port valve. I've attempted to sanitise things a bit and show what the existing wiring would look like if done in a standard 10-Way Junction Box...

I've spent quite a few hours trying to fathom how my boiler is configured. At first sight it appears to have all of the components of a c-plan system, 28mm 2 port valve, hot water cylinder thermostat, central heating pump and room thermostat. Firstly the controller, a British Gas UP2 (Drayton...