The Efficient Home Forum

I have an evohome system with three honeywell actuators.
It looks like one is attached to the boiler and when I bind this my remote room radiators seem to control the boiler fine.

I then have an underfloor heating system with a pump and a 2 port zone valve and wireless room thermostat.
I finally have a cyclinder hot water system with a honeywell sensor, thermostat and a two port zone valve.
I presume the intention of the two port zone valves is to isolate the operation of the underfloor system from the the operation of the cylinder system.

I recently had need to factory reset my evohome controller and rebind everything. I cannot work out if I'm getting this wrong in some way or whether the wiring of the two port zone valves is wrong in some way.

I have bound the cylinder themostat, the actuator I expect to control flow to the cylinder as the Water Heating.
I have bound the room thermostat, the actuator I expect to control flow to the underfloor heating and turn on the pump as a Zone Valve in the room Kitchen.

Does this sound right?

This all started when I lost under floor heating - which I think might be town to a faulty two zone valve motor in that system. So maybe I should replace that first and worry about the config later but any help would be most welcome!

Andrew.

So, I think my first mistake might be to bind the BDR91 that supplies to the cylinder as a "two port zone". I think this needs to be a "heating only valve" otherwise the boiler gets called too much almost irrespective of the bound cylinder thermostat. If anyone who knows could confirm that would be great?

Hopefully my other two zone valve which I am hoping is designed to send water to my underfloor heating is okay to be bound via adding a "room" zone and defining the BDR91 as a two port zone valve. This is the valve that I think has failed as despite the actuator and the pump going green it supplies no hot water). I'll get this valve motor replaced and then I'll know more about how this all hangs together and ahem will label the BDRs and elements that I am now having to use guesswork upon!

Resideo technical support line is there to help you (0300 130 1299). But ultimately, if you don't fully understand the system or what the heating system components are doing, get your local evohome Connected Specialist to come and look for you (obviously ask them what experience they have when you speak or email them) - https://heatingcontrols.honeywellhome.c ... installer/