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Thread: Completely new heating install, best way to configure for EvoHome?

  1. #81
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    Quote Originally Posted by Bovrilelles View Post
    Does this mean the combination of EvoHome BR91 and HR92s on a S Plan dual valve system will effectively zone?
    Can you restate the question ? By "S Plan dual valve system" do you just mean a standard S plan system with one hot water zone valve and one heating zone valve ?

    Or are you talking about an S-Plan plus system with more than one heating zone valve, for example to different floors ?

    As for zoning - if you fit HR92's to all radiators then your house is fully zoned (regardless of whether you have any heating zone valves) as every zone on the controller can be scheduled and controlled independently and all are capable of calling for heat from the boiler. EG There is no one specific zone that always has to be heating to get heat elsewhere, such as a room stat in a hallway on a traditional system where if that hallway isn't calling for heat no other rooms can get heat. (One of my pet peeves with a traditional single thermostat and manual TRV's system)

  2. #82
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    Definitely S Plan rather than S plan plus unfortunately. Roger that re fitting TRVs to all to accommodate zoning.

  3. #83
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    S-plan plus is redundant with Evohome as the TRVís do the zoning for you. Youíd just end up wiring all heating zone valves to come on together anyway as evohome does not have the ability (or need) to independently control multiple heating zone valves for HR92 radiator controller zones.

    In fact itís possible to configure an S-plan system without any heating zone valves with evohome (just one for hot water) as long as all radiators have HR92ís, although there are some minor disadvantages to doing that if your boiler boosts flow temperature for hot water reheating.
    Last edited by DBMandrake; 22nd November 2018 at 06:22 PM.

  4. #84
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    Quote Originally Posted by DBMandrake View Post
    S-plan plus is redundant with Evohome as the TRVís do the zoning for you. Youíd just end up wiring all heating zone valves to come on together anyway as evohome does not have the ability (or need) to independently control multiple heating zone valves for HR92 radiator controller zones.

    In fact itís possible to configure an S-plan system without any heating zone valves with evohome (just one for hot water) as long as all radiators have HR92ís, although there are some minor disadvantages to doing that if your boiler boosts flow temperature for hot water reheating.
    Great news! Had a plumber here today (fitting towel rails, magna-clean and bigger pump) who (knows nothing about EvoHome) and told me it was Ďpointless as I needed 12 individual valves coming back to the boiler from each rad to zone ití. Itís tough trying to explain to an Ďexpertí that they might be wrong!! I just wish I had an EvoHome installation specialist nearby (which I donít!) so thank god for this forum!!!
    Boiler been offline for the duration of the day and now not sure controller is communicating with BDR91. Do you know how I can do a factory re-set and re-bind to my controller? (In laymanís terms?!)

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