New to this game so please bear with me if I ask obvious questions !
I am thinking about how radiator valve controlled zones work, especially ones with multiple HR92s and possible a wireless thermostat thrown in. For this scenario assume we have one radiator valve controlled zone with multiple HR92 radiator valves and one wireless thermostat bound to the zone:
Thanks in advance !
I am thinking about how radiator valve controlled zones work, especially ones with multiple HR92s and possible a wireless thermostat thrown in. For this scenario assume we have one radiator valve controlled zone with multiple HR92 radiator valves and one wireless thermostat bound to the zone:
- By default with a 'single room zone', then the first temp sensor bound will be the master temp sensor for the zone (could be a HR92 or Wireless Thermostat). The other temp sensors in the zone will be ignored for sensing and also for learning.
- Assume that the evohome controller detects a need for heat from the master temp sensor in the zone. The CH hot water begins to flow but how are the HR92s actuators in the zone controlled ? Do they have local autonomy to control to flow of water to their radiator depending on the temperature measured by that HR92's sensor compared to the set point temperature? Or is it the case that the evohome controller treats the HR92s as dumb and so directly controls the opening and closing of all actuators, including the HR92 actuators ?
- If the zone is categorised as 'multi-room' then Top Brake told me that all the temp sensors in the zone (I assume the wireless thermostat as well as the HR92 temp sensors) become active. When any of them detects a fall below the set point temperature for the zone then I assume the evohome controller will turn on heat for the zone. One may wonder why multi-room is not the default since this seems to offer advantages for single rooms or multiple rooms with more than one HR92, but consider where a wireless thermostat is used or where some HR92s are in unsuitable positions. In that case the single-room mode is probably preferred since the wireless thermostat can then be made master by binding it first or the unsuitable HR92s excluded. Does turning on 'multi-room' have any other effect on the system ?
- If the system has been setup as a sundial S plan system with a BDR91 controlling the heating zone valve and another BDR91 controlling the hot water zone valve, then if heat is demanded by the zone (because the monitored sensor is below the set point for the zone) one assumes the BDR91 connected to the CH zone valve is turned on. If another BDR91 has also been bound to the Boiler Demand function is that also turned on?
- Can a single device, such as a BDR91, be bound for two functions simultaneously, for instance one BDR91 bound as the control for the CH zone valve and the Boiler Demand?
Thanks in advance !
Comment