wiring digital thermostat to override the timer?

[bers]

Hi,

Can anyone help me wire this digital thermostat receiver onto a boiler that already has an external switch? I've drawn what I think but am stuck on what if anything goes the COM,N/O terminals . Attached are the diagrams from each manual.

My guess:

My best guess

• bers
• 4 Nov 2013
• 1

My best guess for wiring of thermstat

Boiler:

Potterton Titanium 24 diag

• bers
• 4 Nov 2013
• 1

Potterton Titanium 24 diag

Timer:

RWB7

• bers
• 4 Nov 2013
• 1

Siemens RWB7 timer

Digi Thermostat Receiver

Salus thermostat

• bers
• 4 Nov 2013
• 1

Salus thermostat

Thanks!

 

[D_Hailsham]

Do you really mean what you say in the title (wiring digital thermostat to override the timer?)? That you want the thermostat to be able to turn the boiler on, even when the timer says it should be off; and vice versa?

Or do you just want the thermostat to control the boiler when the timer is ON?

 

[bers]

Ah no. I want the thermostat only to override the timer if the timer has the boiler switched on or I've overriden timer to continuous. If timer says off, thermostat to have no effect. thanks!

 

[D_Hailsham]

Ah no. I want the thermostat only to override the timer if the timer has the boiler switched on or I've overriden timer to continuous. If timer says off, thermostat to have no effect. thanks!

Then it's easy


Boiler/2 --- RWB7/2 --- RWB7/1 --- Receiver/2 --- Receiver/1 --- Boiler/1

You can of course go via a wiring centre (junction box).

The receiver live and neutral must come from a permanent source, as in your sketch.