Swap Honeywell CM707 to Hive

[Kelvin Schutte]

I’m looking to replace my current Honeywell cm707 to Hive. I have a combi logic 35 boiler and will attach pics for both. If this pretty straightforward? Step by step guide

many thanks in advance

kelvin

 

[CBW]

It might be easy enough, you need to establish if the blue wire behind the cm707 is a neutral and go from there, failing that scrap the thermostat wiring, and wire receiver next to the boiler. Also get someone competent to carry out 26.9 checks, as that cover forms part of the combustion circuit.

 

[Kelvin Schutte]

Thanks Chris I was planning to install the Hive control unit by the boiler but I will check the wiring with my meter for sure.

 

[DP]

Did not know there was a CM707. There was a Boeing 707

 

[stem]

@Kelvin Schutte be careful. In your other post, you said

I have a combi logic boiler with 2 off (two zones, lounge and rest of house)

In which case likely there will be motorised valves controlling the two zones, if so the Hives are not connected to the boiler and the boiler wiring will not change. In multizone installations, the Hives are wired to the motorised valves.

For future reference the forum rules prohibit duplicate posts. Having two posts running on the same topic frequently causes confusion and misinformation.

 

[Kelvin Schutte]

Thanks Chris I was planning to install the Hive control unit by the boiler but I will check the wiring with my meter for sure.

 

[Kelvin Schutte]

@Kelvin Schutte be careful. In your other post, you said

In which case likely there will be motorised valves controlling the two zones, if so the Hives are not connected to the boiler and the boiler wiring will not change. In multizone installations, the Hives are wired to the motorised valves.

For future reference the forum rules prohibit duplicate posts. Having two posts running on the same topic frequently causes confusion and misinformation.

Is this still a relatively easy install wiring to motorised valves ?

many Thanks

kelvin

 

[stem]

At the moment, there will be two wires connected to the CM707 terminals A & B.

Those two wires need to be rerouted to the first Hive receiver (Single Channel Version) terminals 1 and 3 (Common and Heating On) You can either reroute the existing thermostat cable to the Hive receiver, or alternatively find the origin of the cable that goes out to the thermostat, disconnect it completely and then run a new cable from the terminals to where the Hive receiver will be located.

The Hive receiver also needs a 230V connected to its N and L terminals to provide it with operating power. The 230V should come via the same 3A fused connection unit that supplies the boiler.

The above process is then repeated for the second CM707 and second Hive.

 

[Kelvin Schutte]

@Kelvin Schutte be careful. In your other post, you said

In which case likely there will be motorised valves controlling the two zones, if so the Hives are not connected to the boiler and the boiler wiring will not change. In multizone installations, the Hives are wired to the motorised valves.

For future reference the forum rules prohibit duplicate posts. Having two posts running on the same topic frequently causes confusion and misinformation.

I have found the valves and there is a electrical junction box right by it I will take a pic tomorrow, I assume you mean the hive hub will need to be wired here and not by the boiler in my kitchen? Also will i need two hubs for each zone or can the hub switch multiple zones?

Many Thanks

 

[CBW]

Was it a Scottish person who wrote on those valves? Looks like it says Hoose

 

[Kelvin Schutte]

Was it a Scottish person who wrote on those valves? Looks like it says Hoose

Ha ha yeah I know !!!

 

[DP]

Did not know there was a CM707. There was a Boeing 707

School day for me. CM707 does exist

 

[ianmcd]

Was it a Scottish person who wrote on those valves? Looks like it says Hoose

Heathins it is Heating on other side of extension, do they not teach you anything in Engerland

 

[stem]

I will take a pic tomorrow

OK that could be useful, sometimes it's difficult to see where the wires actually go in a photo, much depends how neat the original installer was.

I assume you mean the hive hub will need to be wired here and not by the boiler in my kitchen?

I think you maybe confusing the Hub (internet connection) and the receiver (where the heating control wires are connected) You can install them where you like provided they are within the range / spec advised by Hive, but the heating control wires would need to be run to the receivers, so usually they are installed adjacent to the motorised valve wiring centre for ease of wiring. The hub normally plugs into your router.

Also will i need two hubs for each zone or can the hub switch multiple zones?

One hub will do, but you will need two Hive thermostats and two single zone receivers.

 

[Kelvin Schutte]

Yeah sorry for the confusion I meant the receiver that needs to be near the mentioned valves. I will take cover off and have a good look and take some photos
Thanks