Hi guys, Hive issue

[chrisc1881]

Hi all. I'm one of the other mob (electrician) and I could really do with some advice please.

I bought a self install Hive smart thermostat and thought I'd fit myself as a plumber friend of mine told me it should be fairly straightforward. He's now :50: off on holiday and it's not straight forward.
The issue I have is with the wiring at the programmer. The Hive wiring diagram has 6 terminations to be wired to, Live,Neutral,1-hw off,2-ch off,3-hw on,4-ch on.
The existing programmer has the same terminations but there is no cable in the 2 termination. I wired it as the existing but the heating won't come on without the hot water and I have to move the lever on the 3 port valve to the right and hook it up to stay. Then I can get heating. I also disconnected the old thermostat and made safe in blocks. all the Hive stuff is up and running, so I know its an issue on the wiring that I need to correct. I hope!!
The boiler is an Ideal Logic Heat 15. Not a combi system. I believe its a regular system. I have an immersion as well. The old programmer is a Honeywell ST9400S1001 that had an old Honeywell thermostat connected to it with 3 wires. I have attached some pictures if it helps.

I would be grateful for any support. Thanks in advance.

Chris

 

[CP1111]

Do you not have a wiring centre?

 

[Chalked]

Did you link the thermostat together? You need to.

 

[chrisc1881]

Do you not have a wiring centre?

Yes

 

[chrisc1881]

No, I disconnected at the old thermostat and put cables in seperate connector blocks. I assumed the old one had to be disconnected so the the temp could be set/adjusted by new one. Otherwise its still being controlled by old. No?

 

[chrisc1881]

Forgot to mention that the old thermostat had 3 wires and there is also a pump (shower type). I live on 4th floor with only mains to kitchen cold. The rest sinks/toilet/shower activates pump for water. Don't know if this helps, just want to give you as much info as poss.

 

[chrisc1881]

I've now connected the old thermostat wiring and turned heating on with hot water off and boiler has fired up. Will post back in a bit.

 

[chrisc1881]

Update:

All sorted thanks for the help. It just needed the old stat wiring to be connected to enable the 3 port valve to operate as it should when called for heat.

 

[Chalked]

Glad you got it sorted.