Drayton Wiser 3 channel heating control

[Waitforme]

Hi
I’m trying to install a Drayton Wiser 3 channel controller for my oil fired boiler.
I have separate downstairs / upstairs heating and h/w. I had 2 Siemens room thermostats linked to 2 Siemens rcr10 433 gb receivers which control solenoid valves ( I think ) on the output from the boiler for the upstairs/ downstairs heating.
I’ve installed the Drayton hub with new backplate and mounted the Wiser room thermostats.
How do I get the Wiser room thermostats to control the Siemens RCR10/433 GB receivers and hence the solenoid valves / boiler ?
Or is it not possible to update my system?
Any help will be greatly appreciated.
Thanks.

 

[ericmark]

The Wiser controls the motorised valves, and the valves fire up the boiler. The hub does not connect direct to boiler.

 

[CountryFan]

How do I get the Wiser room thermostats to control the Siemens RCR10/433 GB receivers and hence the solenoid valves / boiler ?

You don’t. The Wiser would take over the whole system and isn’t compatible with the Siemens. Where are the RCR receivers and where have you installed the Wiser?

 

[Waitforme]

Thanks for the replies.
The Wiser hub is in my utility room and the two Siemens receivers are in the garage next to the boiler.

 

[Waitforme]

If it’s any help here are a couple of photos of my two receivers and the wiring panel below.

 

[CountryFan]

If it’s any help here are a couple of photos of my two receivers and the wiring panel below.

So if you’re correct 7, 9 and 10 are wires for heating and hot water, so you need to place the receiver here. I take it you’ve placed the Wiser in place of a previous programmer?

 

[Waitforme]

Thankfully the original installer left that note inside the junction box below the two receivers.
I’ve replaced the old controller with the new Wiser 3 channel controller, it’s in the utility room next to the garage which is where the receivers and junction box / boiler are.
I’ve got a feeling that I need to connect the two wires that go to the receivers L1 and LX ( that make the switch to call for heating ) together to normally closed, then I can remove the receivers.
But unless I’m sure then I’ll just reinstall the old set up.
I’m pretty competent but wary and respectful of electrics.

 

[CountryFan]

I’ve got a feeling that I need to connect the two wires that go to the receivers L1 and LX ( that make the switch to call for heating ) together to normally closed, then I can remove the receivers.

Yep, that’s what you need to do. If there’s an override on the existing receivers, you can try it that way before disconnecting anything

 

[Waitforme]

So would that mean connecting terminals 7 & 8 and 1 & 9 in the junction box together ?

 

[CountryFan]

I would say so yes

 

[Waitforme]

Thanks for the help.

 

[Waitforme]

Thought I’d update this for future reference.
To get around the problem initially I just turned my old room thermostats up to max to ensure that they called for heating all the time and closed the switch within my receivers. This worked without issue.
I then disconnected the power to my receivers and wires going to L1 & LX, removed the receivers and wiring. I then linked connections 1 & 9 and 7 & 8 together, basically closing the “switch” that the old receivers used to do. System now working.
Thanks again to Countryfan for the help.

 

[ericmark]

Out of interest, wonder why a 3 channel hub was used? I did not want Wiser to control the DHW, my Nest Gen 3 already does that, so only fitted a single channel Wiser hub, connected in parallel to the Nest hub.

I fitted Wiser, as I found the hall temperature was not representative of the house temperature in general. The hall cooled too slowly, so was not turning the heating back on when required, and the wiring would mean hard to move it to living room, and since living room also had an open fire, not a good idea to have a single thermostat in the living room.

So Wiser is wireless, so the thermostat can go where ever I want it, and I think I can have up to 9 thermostats connected to one hub, at the moment I have 2, one wall mounted, and one TRV head in wife's bedroom. So 3 in all when including the Nest.

My only problem with Wiser was wife's bedroom out of range, and need to use a smart socket adaptor as a relay for the zigbee system the Wiser uses, and that socket is not on an UPS supply, so the TRV head will stop working in a power cut, but we don't have enough power cuts to worry about it.

The other 9 electronic TRV heads do select when and by how much other rooms are heated, eQ-3 were only £15 each, so I was a cheap skate, and used cheaper TRV heads in other rooms. In the main, one of the three thermostats will fire the boiler when required, so all rooms are at temperatures selected.

One other niggle, is the TRV in wife's bedroom is next to an outside wall, so it can turn on the boiler when not really required, I know putting a wall thermostat in the room it can be paired to the TRV, but not enough of a problem to be worth while.

I had hoped the temperature sensors would have been released for the British Nest like they have for USA Nest, but decided not to wait.

But with electronic TRV heads as with the Wiser system, can't see why one would need a three channel head? Can you explain please?

 

[denso13]

can't see why one would need a three channel head? Can you explain please?

I have separate downstairs / upstairs heating and h/w.

 

[ericmark]

I see my HW is the same upstairs, downstairs and down steps. I have motorised valves as a legacy from when I did not have motorised TRV heads. And since down-steps is not used in winter, it suits, but top two floors both all TRV controlled. And has been that way since I started using motorised TRV heads.