Re-using CM927s with Evohome?
Posted: Mon Apr 20, 2020 2:29 pm
I'm just thinking about fitting an Evohome system. I have a largish house, with 3 floors (4 if you include the cellar), plus an external workshop, all with rads for the most part, but with the recent replacement of some of it with a four zone underfloor heating system. The latter has fairly new controls (Danfoss) with specialist facilities, like infra-red sensing of the floor temperature, and I want to to leave that intact.
The rest of the system has grown up higgledy-piggledy over the 26 years we have lived in the house, with additions made over time. At present there are 3 radiator zones, two controlled by Honeywell CM927s, BDR91s and zone valves, and the middle floor left uncontrolled (cos I never got round to sorting it!). There are manual TRVs everywhere. I would like to get something close to one room per zone, ultimately.
I've actually got a total of three CM927 wireless thermostats, and a pile of BDR91s left over from various reconfigs at various points. They are all working fine.
What I am wondering is whether the CM927s can be used with the Evohome controller as room thermostats? I am aware they are not included in the Evohome system line-up, but clearly they share the same underlying wireless protocol, since they talk to the BDR91s, and those are part of Evohome.
No-one would buy CM927s to use with Evohome, but given I have three - can I reuse them - or do I have to scrap them and fit DT92Es, or similar?
Richard
The rest of the system has grown up higgledy-piggledy over the 26 years we have lived in the house, with additions made over time. At present there are 3 radiator zones, two controlled by Honeywell CM927s, BDR91s and zone valves, and the middle floor left uncontrolled (cos I never got round to sorting it!). There are manual TRVs everywhere. I would like to get something close to one room per zone, ultimately.
I've actually got a total of three CM927 wireless thermostats, and a pile of BDR91s left over from various reconfigs at various points. They are all working fine.
What I am wondering is whether the CM927s can be used with the Evohome controller as room thermostats? I am aware they are not included in the Evohome system line-up, but clearly they share the same underlying wireless protocol, since they talk to the BDR91s, and those are part of Evohome.
No-one would buy CM927s to use with Evohome, but given I have three - can I reuse them - or do I have to scrap them and fit DT92Es, or similar?
Richard