Need help wiring a Heatmiser RF Switch for heating and hot water control.

MAKH · Oct 30, 2018

Hi All,

Im not an electrician, but i like to do things myself if possible, so i'm here to ask for some help in wiring a new RF switch for controlling my central heating.

I already have a heatmiser system that controls my underfloor heating downstairs, but my upstairs rads and hot water are not connected to it and are controlled by a separate honeywell timer.

I've uploaded the pictures of my current honeywell wiring, and the new RF switch i want to deploy, i have a separate wireless thermostat which ill use to control the central heating once the RF switch is in place.

Any help would be much appreciated, thanks in advance.

[ElectriciansForums.net] Need help wiring a Heatmiser RF Switch for heating and hot water control.

Leesparkykent · Oct 30, 2018

3 is HW on/normally open and 4 is CH on/normally open. The instructions are pretty clear. Do you already have a existing thermostat for the rads that needs removing?

MAKH · Oct 30, 2018

No there's no existing thermostat, the rads were controlled using TRV's only.

Leesparkykent · Oct 30, 2018

MAKH said:
No there's no existing thermostat, the rads were controlled using TRV's only.

Cool. As per diagram ignoring the boiler connection... as it’s not needed as the two port valves switch the boiler.

MAKH · Oct 30, 2018

So HW on No2, Heating on No1 and live, earth and neutral on their respective connections. Just want to make sure there's nothing else required.

Leesparkykent · Oct 30, 2018

MAKH said:
So HW on No2, Heating on No1 and live, earth and neutral on their respective connections. Just want to make sure there's nothing else required.

The commons are linked to L in the diagram as well.