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Yes, I believe that it is of the potable type. WIth regards to the thermostatic actuator it's a device (Oventrop 114-28-63) which has a sensor probe which is strapped to the inlet side of the valve.

Can anyone confirm how an Oventrop 3 way diverter valve works ie is it open one route out and closed the other and vice versa or are their intermediate positions where both routes out are open? I've fitted it into my hot water system with the idea that at some stage I'll fit a solar system...

Hmmm! Not so sure as I do! I've had the BG boys in to it and they spoke to Worcester-Bosch and by the sounds of it they advised them to change the PCB - I believe that the temperature control for the CH is part of this (not sure if they changed the diverter valve too). But, the problem is still...

Well, thanks for the comments guys - I've not got the boiler fixed but I sure as hell have been well entertained whilst I sit here freezing my nuts off!!

Hi guys, thanks for your replies - I work away so I don't always get chance to log on - thank heavens it's still mild weather! The controls are on the right hand side, the boiler is about 5 years old. I can't guarantee that the roomstat (wireless) is talking to the boiler but when I alter the...

The boiler appears to be working okay (in HW mode) but not in CH mode. I have no flashing lights to suggest a fault, but the CH does not come on when the remote thermostat demands it. I noticed that the CH temperature control knob on the boiler turns continuously though. Also, I did manage to...

Thanks for your suggestions but I'm still baffled. I understand that it is probably not the best set up for efficient use of solar energy but I need to replace my boiler and already have a Megaflow and a big roof facing south so it's a case of making the best use of what I have. The legionella...

Thanks gas4you. You're right, it does seem fairly straightforward to me. Why should it make a difference to the combi if water comes in at 10deg or 40deg, providing it's at mains pressure it's only going to heat it to the required output temperature. However, accepting your advice, if it's not...

I have an unvented Megaflow cylinder which until recently operated in a conventional manner using a system boiler. However, I have had an extension built which I intend to fit underfloor heating in (water-fed), and as a consequence of this I have now discovered that I have to uprate my boiler...