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Thread: Honeywell CM Zone - basic questions

  1. #31
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    Default Two HC60NG per Cm67z

    Is it possible to have two HC60NGs per CM67z? I want to have one to control a zone valve, the other to control the heat demand signal to the boiler.

  2. #32
    Automated Home Sr Member NeilUK's Avatar
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    Quote Originally Posted by Specialk View Post
    Is it possible to have two HC60NGs per CM67z? I want to have one to control a zone valve, the other to control the heat demand signal to the boiler.
    Normally the zone valve actuator would include an end-switch (relay) that is used to provide the heat demand to the boiler which also ensures the valve is open before the boiler fires. Any reason why you could not do this and avoid the need for a 2nd HC60NG?

    There is no documentation to confirm if multiple HC60NGs can be registered this way - the wireless protocol does require messages to include the sending and receiving module id's so it could well be the case that there is only 1 address"slot" for a HC60NG within the CM67. Unfortunately the only way to be sure is to try it and see if it works.

  3. #33
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    I have a house with four floors. The boiler at the top floor while I want to zone the bottom floor. Getting a wire from the top to the bottom will not be ease. I have a hunch it might be possible:



    Quote Originally Posted by dblaby View Post
    Can anyone help me with this?

    I have got a large CM Zone system but cannot seem to get the right answers from Honeywell for my question!

    I have 4x CM67z Room Units and 5 HC60NG (4 for zone valve control bound to the CM67z's Zone 1 and One for the boiler control) and a range of HR80's bound to the CM67z Zone 2 so 8 zones in all - 4 controlled by Zone valves and 4 controlled by HR80's.

  4. #34
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    Hi, First post so here goes. When the CM67Z is programmed to off for a zone say at the end of a time segment does the rad HR80 close all the way, or does it simply not signal the boiler/pump. Reason for asking is that I am considering 4 zones, this was to be 4 x prog stats & 4 x zone valves, but if the HR80 closes roght in when the programmer goes to off or a low set back temp, then I think I can do away with the zone valves.
    Does this make sense?
    Thanks, Southview

  5. #35
    Automated Home Sr Member NeilUK's Avatar
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    Quote Originally Posted by southview View Post
    Hi, First post so here goes. When the CM67Z is programmed to off for a zone say at the end of a time segment does the rad HR80 close all the way, or does it simply not signal the boiler/pump. Reason for asking is that I am considering 4 zones, this was to be 4 x prog stats & 4 x zone valves, but if the HR80 closes roght in when the programmer goes to off or a low set back temp, then I think I can do away with the zone valves.
    Does this make sense?
    Thanks, Southview
    The HR80s will close when off although they also have a valve-exercise routine - this occasionally opens them should they be closed for a period of time (cannot remember if this is a fixed time period or adjustable through the config paramters) to try and prevent them seizing up when shut off for a long time (such as summer).

    So yes, you can avoid the additional zone valves as long as you are fitting HR80s to most/all radiators.

  6. #36
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    Default Confirmation on how CM Zone works?

    I have a Combi-Condensing boiler.... with a single physical piped zone for all radiators + one thermostat. The degree of heat retention in each room varies quite a lot so I find some rooms heat ok and others are cold. Adjusting the TRV's helps.. but they do not have the ability to call for heat in a room that is colder than the location of the thermostat. Factors such a solar heat from the sun or heat loss result make difficult to control the heat evenly and is wasting gas.

    Hometronic was the initial product I was interested in... but the cost and lack of availability has detered me up until now. CM Zone... although lacking in some flexability in comparison to Hometronic, would appear to be a worthy alternative.

    Can I ask for advice as the product literature leaves me with a few questions:

    If I have three bedrooms all on the same zone, each with one radiator and a HR80 fitted... will the system call for heat from the boiler until "each" room is at the desired temperature set by the CM67z ?

    ie the HR80's sense the room temperature as oposed to the CM67z... correct?

    One bedroom is generally colder than the other two.... so takes longer to heat. So am I correct in saying that the HR80's in the other two bedroom would self adjust/close... whilst the less insulated room continued to call for heat until it caught up?

    Taking this a stage futher with multiple zones.... given that I only have one physical piped zone connecting all radiators. Does CM Zone create "virtual" zones by opening / closing the HR80's?

    So if I wanted heating in the down stairs zone but not upstairs... then the CM67z would set the HR80's upstairs to be closed... whilst the HR80's downstairs call the boiler for heat. The end result is that hot water would be pumped around all the pipe work upstairs and downstairs... but only heating the radiators downstairs.

    Is this how CM Zone operates?

  7. #37
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    Yes the system call for heat from the boiler until "each" room is at the desired temperature set by the CM67z ?

    Each HR80 radiator actuator has a temperature sensor built in

    The CM67z creates two zones with different times / setpoints for each day typically you could zone upstairs / downstairs

    If all HR80's are happy the boiler will go off

    The CM zone kit is expensive but works well and is easy to program.

    If you would like to purchase Hometronic equipment please drop me or Neil an email

  8. #38
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    Hi,

    Newbie here.

    I am interested in this system. Do I need an installer? The installation instructions read:

    "For existing Y Plan remove only Room Thermostat connections from Junction Box Terminals and replace with Connections to HC60NG."

    http://www.honeywelluk.com/documents...l/pdf/1148.pdf

    My old RT used to have three cables, of which I only used 2 when I replaced it with the CM907. Am I just fitting these 3 cables to the appropriate terminals of the HC60NG, or do I need to reposition them in the Junction Box?

    Many thanks in advance!

    Also, any ideas for good prices on the pack?

  9. #39
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    Hello,

    I'm considering an upgrade to CM zone. Our house is arranged over 3 floors and the current system has a zone valve on each floor, all radiators have manual TRVs. For various reasons the old control system must be replaced (long story). Right now some rooms remain cold even when the thermostat thinks the house is up to temperature (it's an old stone house with little scope for extra insulation and we're not going to replace any radiators).

    I can see two ways to set up the system:

    - A CM-zone pack (such as this one) with an additional CM927 stat for the third zone.

    - 3 CM927 units and a few HR80 radiator valves as extra remote sensors in rooms that loose heat quicker than the rest of the house and/or for rooms where we might want to override the central set point.

    Any comments or suggestions would be appreciated. Is one option significantly better than the other? Should I be considering a totally different system? The second option is quite a bit cheaper, especially if we initially only get 1 HR80.

    regards,

    drbob

  10. #40

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    Quote Originally Posted by drbob View Post
    Hello,

    I'm considering an upgrade to CM zone. Our house is arranged over 3 floors and the current system has a zone valve on each floor, all radiators have manual TRVs. For various reasons the old control system must be replaced (long story). Right now some rooms remain cold even when the thermostat thinks the house is up to temperature (it's an old stone house with little scope for extra insulation and we're not going to replace any radiators).

    I can see two ways to set up the system:

    - A CM-zone pack (such as this one) with an additional CM927 stat for the third zone.

    - 3 CM927 units and a few HR80 radiator valves as extra remote sensors in rooms that loose heat quicker than the rest of the house and/or for rooms where we might want to override the central set point.

    Any comments or suggestions would be appreciated. Is one option significantly better than the other? Should I be considering a totally different system? The second option is quite a bit cheaper, especially if we initially only get 1 HR80.

    regards,

    drbob
    I'd suggest taking a look at the new Evo Home controller - it provides control for upto 8 zones and will work just fine with HR80s and the BRD91 boiler relay module. It will certainly be cheaper than using lots of CM927s and gives you more flexibility. You can also add hot water control using the wireless cylinder stat from Honeywell too.

    We've just added the Evo controller to our exhibition stand so you can take a look if you are visiting the HB&R Show at the NEC in a couple of weeks.

    Evo seems to sit nicely between CM Zone and Hometronic both in features and price. Its only just been launched and as yet Honeywell have no documentation for the UK (they have different features compared to the euro model so are choosing not to use the standard euro brochure). It cannot use generic switching like Hometronic does but it will use the 868MHz heating modules such as HR80s and the Manifold Controller for underfloor use.
    Sensible Heat
    SensibleHeat.co.uk

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