Is it possible to have a wireless roomstat with a Baxi 105e?

[armyash]

Hi I have had a friend ask me if the above is possible, I'm not sure so thought I would pick the brains of you guys

If it is possible can you please explain how it is done, thanks.

 

[R1CKY]

Yes it is possible.

From memory they have a set of terminal blocks with 240VAC Live, Neutral and Earth with a volt free link to switch the heating. A wireless stat will also have a 240VAC live and neutral connection (unlikely to have an earth) with a set of volt free switching contacts.

Pick up your live an neutral supply from the L + N terminals on the boiler.

Remove the link on the boiler and wire it to the switching part of the stat. If you are unsure about it, don't attempt it as you can risk blowing the PCB if not connected correctly.

 

[Dannypipe]

Agreed. Very easy to acheive.

I like the Honeywell range.

 

[armyash]

Yes it is possible.

From memory they have a set of terminal blocks with 240VAC Live, Neutral and Earth with a volt free link to switch the heating. A wireless stat will also have a 240VAC live and neutral connection (unlikely to have an earth) with a set of volt free switching contacts.

Pick up your live an neutral supply from the L + N terminals on the boiler.

Remove the link on the boiler and wire it to the switching part of the stat. If you are unsure about it, don't attempt it as you can risk blowing the PCB if not connected correctly.

Hello, Thanks for that. Might sound a bit silly but can you explain what you mean by "Pick up your live an neutral supply from the L + N terminals on the boiler."

1) The link you refer to is th link in the mains input (correct?)
2) Wire this link to the switching part of the room stat (coorect?)

I am not overly experienced in wiring. I am not doing this job, the person who is asking lives up the other end of the country, but it will be useful for me to know.

 

[R1CKY]

Quick and rough wiring diagram. Terminals on a wireless stat will vary, but the diagram on the right is the basis for any room stat.

Common = input
NO = terminal which is NORMALLY OPEN, this is your heating demand, this becomes a full circuit when the room temperature is below the target temperature.
NC = terminal which is NORMALLY CLOSED, this becomes a full circuit when the room temperature is higher than the target temperature, not generally used in central heating applications.

 

[armyash]

Lol, sorry i'm still confused. I don't understand how that is a wireless room stat if there's wires between the boiler and room stat. Forgive me

 

[SilentMike]

its the receiver for the stat you normally put it next to the boiler, some you can get wich you can swap for the time clock on certian models, it will comunicate with the stat which will be battery powerd

 

[armyash]

its the receiver for the stat you normally put it next to the boiler, some you can get wich you can swap for the time clock on certian models, it will comunicate with the stat which will be battery powerd

Do you mean the programmer? Sorry I have worked with mainly worcester combis that have the programmer on the boiler and then just a separate room stat.

 

[SilentMike]

yea, carn't say i've seen one to swap with a worcester programmer tbh proberbly can get them thought. its better to use one with a receiver at the side of the boiler you have more options then you can use either the programmer or just the stat sometimes you can use both to work with each other too, just quicker to install the other ones

 

[PlumbBobBob]

no ash you have the receiver which you wire up to the boiler and then you have the stat which communicates with the receiver by radio waves hence wireless

 

[R1CKY]

Lol, sorry i'm still confused. I don't understand how that is a wireless room stat if there's wires between the boiler and room stat. Forgive me

My fault, you wire a receiver to the boiler, the wireless stat communicates with the receiver, the receiver then turns the heating on or off.

The "wireless stat" in my diagram is the wireless stat receiver.

 

[armyash]

Thanks guys!

 

[armyash]

How to fit a wireless room thermostat | fit Honeywell wireless thermostat - YouTube

Is it Ok to post this?

Came across this video, very simple job. Advised my mate to get a profesional in though. Good for me to see as I am just getting in to the wiring side of things at work a bit more.