Remove boiler timeswitch when installing thermostat?

ilikewatch

Hi,

I have a Vaillant Turbomax Pro boiler and am planning to install a new wireless thermostat, the boiler currently has a built-in Vaillant timeswitch.

When I install the new thermostat do I have to remove the existing timeswitch and cover this with a blanking plate, or can I leave the timeswitch in without it interfering with the thermostat?

I ask because I'm dead tight and would rather not get shafted to the tune of £8 for a manky looking used blanking plate from eBay :-)

Lorian

Does the timer have an "always on" setting?

ilikewatch

Yes, the CH and DHW can both be set to off, on or timed.

Gloomendoom

What does the wireless thermostat talk to?

ilikewatch

The wireless stat (a Netatmo) comes with a box which is wired into the boiler.

zaax

You will need the timer for the HW. Just set the HW to timed say 10 to 11 am and 8pm to 12 midnight, and the CH to always (on or alway off in the summer)

ilikewatch

The hot water is only used on demand, so I've never actually set the timer to control it (there's no hot water storage)

Le_Kirk

So it is a Combi then. Why do you want to remove the time switch? If you do, the boiler will/may never switch on unless you contrive to rearrange the wiring to be always on. If you do this you will be controlling the boiler on a thermostat 24 hours per day. Just install the wireless thermostat and connect the box that comes with the Netamo into the thermostat connections on the boiler as per the instructions that - presumably - also come with the Netamo.

zax47

At the risk of appearing obvious - a thermostat is a thermostat & a timeswitch is a timeswitch, so why do you feel the need to replace one with the other?

One dictates which times the boiler will be on and able to fire up if required, the other regulates it's activity to achieve a required temperature during the enabled on period....

Or do you actually mean "programmer", not timeswitch - which is something else entirely.