Thermostats mixed up on Ultracom Boiler

[coleyroly]

Hi all,
Just need a bit of help with a Glow worm ultracom 35cxi boiler, please.
I've moved into a house and have 2 room thermostats, 1 on each floor. They are currently both set to turn on at specific times of the day. When I want to overide the timer and just turn on the heating, I can turn on the heating via the thermostat, but it's the opposite floor in the house that comes on/ Ie Turn on the heating from the ground floor thermostat and on comes the heating upstairs.
I'm assuming its a wiring issue connecting to the boiler. I've read the manual, and can see that the thermostats connect to X17 on the PCB, however how do these connect, as I've never done this before. Is it on the back of the PCB as there are no wires going into the front connector.
Hopefully makes sense ! Any help appreciated.
The Thermostats are Siemens RDEs

 

[D_Hailsham]

The thermostats do not connect directly to the boiler, but to two motorized valves.

View media item 11762
The thermostats and valves will normally connect via a junction box. The installer has got the valves muddled up.

Turn the power off
Remove lid of junction box
Find the brown wires for each valve
Swap them over
Replace lid
Turn power on

 

[coleyroly]

Thanks so much for taking the time to reply ..
I've attached a photo of the two valves, is it just a simple matter of swapping the brown wires ? Or would I have to rewire each valve.

Thanks again

Untitled

• coleyroly
• 2 Jan 2015
• 1

 

[gazdaz36]

Are they wired or wireless room stats?

 

[coleyroly]

Are they wired or wireless room stats?

Wired, thanks

 

[Terry lambert]

As said

Follow the black cables from those valves, they lead to a junction box, open junction box/wiring center and swap over the brown wires.

If that doesn't solve it, post back

 

[coleyroly]

Thanks all for replying, all sorted, brown wires swapped

 

[Boilerman2]

Are we all on Silly pills?? surely the easiest way would be to simply swap the two actuator heads over?? - still it's sorted now!

 

[Terry lambert]

I'd say as long as it's short.