Help Controlling a Baxi 105e combi boiler

[chrisb99]

I have the Baxi 105e and have already replaced the mechanical timer with the electronic 7 day timer (which incidentally, I find to be an appallingly designed user interface). All but one of our rads have TRVs but actually balancing these and the timer correctly for the whole house without a room thermostat and without constant trips to the boiler timer has proved to be impossible.
How easy it is to fit a wireless room stat to use with this boiler in combination/instead of the current timer?
Can this room stat also have programmer functions that can be used instead of the one on the boiler?
Can any standard wireless stat/programmer (Danfoss, Honeywell etc.) be wired into this boiler, or would it need to be the Baxi one (and if so where would be a good place to source it).
Any help appreciated greatly.
Chris

 

[pannierstan]

Chris if you want a wireless stat from honeywell or such then get one with its own receiver which you can site near the boiler and then have wired in by a sparky.

There is no way on earth a system will ever be right without a roomstat and contravenes the regs to be installed like that.

How longs it been in?

 

[bster]

I have a 105e and so does the Gas bloke i work for, he got rid of his digital baxi timer (because he found it a pain ) and i have a Honywell CM61 wireless programmable room thermostat, it also has loads of features that can be enabled\disabled at will, including optmum start (saves money but i dont actually use it!).

I have tried balancing my CH system with a differential thermo and basically i cannot get the required drop across each rad ( 5 degree drop at most), but as its a small sealed system the rads heat up in seconds so i'll call it........... Baxi 1: Me 0.

 

[chrisb99]

Thanks for the info. I think I'll pick up the CM61 and locate a sparky to fit it at the business end. Presumably I can just remove the programmes that I have set on the boiler timer and that won't interfere with the new one at all?
When I moved in, the system was a standard boiler/pump/cylinder/header tank set up which I had replaced with the combi. With the previous set up there was no room stat either, I guess that's why the boiler fitter didn't bother about one...

 

[bster]

When you remove the timer, there will be a couple of terminals that, when out of the box (with no programmer on the boiler) are connected to a terminal block, i dont know if the timer wire terminals are just 'parked' in the block or not though?.