CH replacing timer with smart switch....

DUTR

The timer has packed up on my CH system (vented Y plan set up)
the present programmer has 2 modes DHW or Heating + DHW
the model I was looking at is the Wiser 2 channel.
I'm assuming L1 calls for heat and activates the pump , whilst L2 additionally activates the Y valve.
My query is the Wiser has two options DHW or Heating , I can see clearly , I would get timed options for DHW, I'm not so sure about heating only.

Can anyone confirm if these units are able to work on my system?

FreeBear

Normally, there are just two connections from the timer to the rest of the system. One signals to turn on the central heating, the other switches on the hot water. The link to the boiler, pump, zone valves, and thermostats is all done in a junction box with a bunch of messy wiring.

After taking a quick look at the Drayton Wiser (manual & User guide), it is designed to simply replace an existing timer and just slots in to the old wall plate. An easy enough job to do once the power has been turned off. Once installed & configured, you should be able to control hot water & heating independently although, the wiring in the junction box may need altering.

DUTR

FreeBear said:

Normally, there are just two connections from the timer to the rest of the system. One signals to turn on the central heating, the other switches on the hot water. The link to the boiler, pump, zone valves, and thermostats is all done in a junction box with a bunch of messy wiring.

After taking a quick look at the Drayton Wiser (manual & User guide), it is designed to simply replace an existing timer and just slots in to the old wall plate. An easy enough job to do once the power has been turned off. Once installed & configured, you should be able to control hot water & heating independently although, the wiring in the junction box may need altering.

Thanks for the prompt reply.

DUTR

Just a quick update, the unit arrived and fitted in minutes, just to note the DHW and HTG are separate, so I will run the switched live from the valve to the correct connection in the wiring centre and bypass the room stat, apart from that all good.