Honeywell BDR91 to Hive replacement

[spudkin]

I’ve recently removed a Honeywell BDR91 wireless receiver and controller and installed a Hive dual channel receiver in its place. The Hive is now hardwired using the existing backplate, with connections to Live, Neutral, Earth, and the three switched terminals 1, 3 and 4 for central heating and hot water.

System details:
- Boiler: Worcester Bosch Greenstar 24ri (heat-only)
- Control setup: Y-Plan with 3-port valve
- Wiring center: Standard 10-port junction box
- New controller: Hive dual channel receiver & thermostat.

What’s been done:
- BDR91 faceplate removed
- Hive receiver installed and powered
Only the hot water appears to respond correctly from the Hive unit

What I need help with:
I’m now reviewing the junction box wiring to ensure it’s correctly configured for the Hive’s dual outputs.

Removing the BDR91 faceplate has effectively left a gap to controll the heating somewhere.

Any help greatly appreciated!

EDIT:

Reconnected TERMINAL 4 from HIVE backbox (Originally connected to black cable A on BDR91 receiver backbox),

to:

WHITE cable on 3 way-valve.!!

JOB DONE - Hive now fully rerouted for both CH & HW

 

[cross thread]

While since I worked on one but isn’t a bdr a single channel receiver ?

 

[spudkin]

While since I worked on one but isn’t a bdr a single channel receiver ?

Yes, It is. Its just the hard wired controller side for the wireless heating thermostat.

 

[cross thread]

Then you need a single channel hive or rewire to use the one you have

 

[ericmark]

The Hive unit will replace the programmer, not the thermostat. The thermostat will become redundant and also need by-passing and removing, but either you need a single channel Hive, or it replaces the programmer.

I have a single channel Wiser to help run the central heating, there is nothing to stop one having a thermostat in every room if you wish, and only one device, in my case Nest Gen 3, runs the domestic hot water as well. But one wants the modern thermostat to work independent to the programmer, as you don't want heating turned off, you only want it to turn down.