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@MarkBarl Mark, This is basically the jist of this thread.. "can anyone suggest a suitable replacement for the existing (mechanical) timer"

DP, Thankyou very much for your answers - I have a couple of further questions now though ... sorry !! I thought I would need 6 channels (hw on/off, ch on/off, HW & ch on/off). My boiler has 3 switch settings - A 'O' which I presume is off, a '*' (star) which I think means hot water...

Hello Thanks for the reply, I am actually looking for a timer. I want to independently control CH & HW. Would a Siemens RB29 suffice?

Hello Can anybody point me to a suitable replacement timer for a Vokerra Excell 80SP combi boiler. I am looking for a 7day digital timer. The current boiler controls are located on the front panel of the boiler, it is my intention to run a digital timer to a more accessible location...

Ahh thanks for clearing that up. Am i allowed to use flex though? as the wiring guidlines for the controller suggest fixed wiring - which i was under the impression was/is solid core. Ideally i want to use 2x3core .75mm flex as this gives me the best flexibilty and I will be easier to use...

Are you saying that all UPVC cable is heat resistant to 85c by default and I do not need to worry about special heat resistant cabling?

been looking on B&Q website and did not see that :(

Dave, Do i need to use heat sheilded cable or will ordinary T&E / 3 core cable do the trick. The wires currently in the boiler are just thin unshielded cables that go to the timer from an internal choc-blok. My intention is to wire directly into this choc-blok (removing the original unused...

Hi I have a boiler with a non-working mechanical timer that I intend to replace with a more controllable / working modern electronic one. Currently the timer is attached to the boiler itself, so I am considering putting the new timer in a more accessible location - by just extending the...

All Would the cable 0.75mm 7 Core Pvc Flex Grey be ok to use for a central heating timer ? Does it need to be heat shielded ? Am thinking of using this cable to extend my boiler controller?

Gaddam it guys - you post to fast for me :) Going to replace the wiring with 0.75mm 7 Core Pvc Flex Grey, this should be ample to carry a 3metre extension of the internal wiring to my control unit and it has the added advantage that i can wire this directly into the existing mains block on...

Point noted - about the T&E and my misuse of the earth. The controller basically receives L+N and returns 2 switched connections back to the appliance. So yes i use the earth as a live conductor.. I figured that since the T&E is alot thicker (even the earth) than the original cabling it...

Doh I am an idiot..did not scroll down the page link you sent me .. Think i found the one i need "Ashley J804 Maintenance Free Junction Box 20A 4 Terminal" This will take the 6 wires and i can mix the cable thicknesses Thanks

Thanks for the reply - to clarify It is an 240v appliance ~5amps . I am fitting a control unit to the appliance by "extending" the internal wiring and the only extension cabling i have is T&E 1.5mm solid core. As there are 6 wires and the extension control unit has no earth anyway I am...

Hello, I have 6 wires all twisted cable and i need to join these wires to 2 x twin & earth solid cable.. Not able to find a 6 core cable :) Because the wires to be joined are different thicknesses I do not believe a safe connection can be made directly with a 15amp chock box. I am looking...

@bhm1712 Absolutely no problem. I appreciate the effort/time you took to help me Thanks

Once again.. Thankyou very much for all your help

@namsag Thankyou for all your help...Your posts sorted me out On the back of the new Siemens model was a dip switch - as you correctly summarised it was set to "16" - Setting it to "10" as per the original spec solved my issue... Much appreciated.. PS.. Now when CH is on and the...

The boiler has 4 pipes on it The new Siemens Rb29 does not have a 10/16 switch it has dip switches only to say 7 day prog/week prog etc.. The old (now i find non original timer RWB2E Landis Staefa) had the switch set to 10 as you directed. Someone has replaced the original unit with the...

More questions Does this boiler support seperate switching of CH/HW ? Can anyone suggest any electrical test I can do - i have a multimeter and know how to use it - but I do not know in what area I need to be looking for the fault. I am making the assumption that the boiler functioned...