Hi everyone I have Vaillant VCW GB 242 boiler with switchmaster 300 time switch and no separate thermostat I know its old but still working good.
Install Diagram at VCW 242/282 (acwilgar.co.uk) for boiler.
I have installed a nest thermostat 3rd generation
Install Diagram 3rd-gen-Nest-Learning-Thermostat-Install-Guide-UK.pdf for nest.
The wiring with the switchmaster 300 was
Neutral on boiler to neutral on switchmaster 300 (blue)
Live on boiler to live on switchmaster 300 (brown)
Number 3 on boiler to number 4 on switchmaster 300 (black)
Number 4 on boiler to number 1 on switchmaster 300 (yellow/green)
This is what I have done
Neutral on boiler to neutral on nest (blue)
Live on boiler to live on nest (brown)
Number 3 on boiler to number 2 on nest (black)
Number 4 on boiler to number 3 on nest (yellow/green)
Can someone tell me if this is correct has the heating is on constant and I don’t know if this is to do with the install or if it is to do with the software setup.
Any help will be much appreciated thank you.
Install Diagram at VCW 242/282 (acwilgar.co.uk) for boiler.
I have installed a nest thermostat 3rd generation
Install Diagram 3rd-gen-Nest-Learning-Thermostat-Install-Guide-UK.pdf for nest.
The wiring with the switchmaster 300 was
Neutral on boiler to neutral on switchmaster 300 (blue)
Live on boiler to live on switchmaster 300 (brown)
Number 3 on boiler to number 4 on switchmaster 300 (black)
Number 4 on boiler to number 1 on switchmaster 300 (yellow/green)
This is what I have done
Neutral on boiler to neutral on nest (blue)
Live on boiler to live on nest (brown)
Number 3 on boiler to number 2 on nest (black)
Number 4 on boiler to number 3 on nest (yellow/green)
Can someone tell me if this is correct has the heating is on constant and I don’t know if this is to do with the install or if it is to do with the software setup.
Any help will be much appreciated thank you.