Greenstar 2000 Honeywell Home T3R Programmable Wireless Thermostat (Y3H710RF)

Discussion in 'Plumbing and Central Heating' started by Zaina, 15 Jan 2022.

  1. Zaina

    Zaina

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    Hi All, wondered if someone can advice me.

    Boiler and Honeywell themostat were fitted last year.

    The themostat was switching on and off, we replaced the battery but wasn't still working properly.

    Now ordered Honeywell Home T3R Programmable Wireless Thermostat (Y3H710RF) how do we connect it to the boiler. I have added picture of the old themostat. The numbers of the themostat aren't exactly the same. Not sure if the previous one was wired and new one is wireless.
     

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  3. CBW

    CBW

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    If the old one was wireless (it might be as it’s got RF in the code) then you can just swap the receiver like for like, possibly even utilising the backplate.
     
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  4. ericmark

    ericmark

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    Thermostat can be volt free, 230 volt, 24 volt, even 0 - 60 volt, there is no one fits all.

    There are two reasons for a thermostat, one is to actually control room temperature, rather rare now, in the main the wall thermostat is to turn off boiler on warm days to stop it cycling.

    To control room temperature it may be analogue connected to boiler ebus, or if digital it may start to switch boiler off/on before the set point to reduce the hysteresis, which is great for an old oil boiler, but will mess up a modern modulating boiler.

    In the main room temperature is controlled by the thermostatic radiator valve (TRV) the wall thermostat is either a hub collecting info from the TRV's or placed in an area normally kept cool on lower floor with no alternative heating or outside doors a wall thermostat. Although rarely that simple, so we end up with some sort of lash up.

    However how we make it work depends on the boiler installed and the home layout, we have no idea of either, so can't really answer the question.
     
  5. CBW

    CBW

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    I think you have the wrong thread. The question was simple.
     
  6. ericmark

    ericmark

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    That is how most thermostats work.
    Clue in part number ending in RF there is a radio frequency link. The installation guide shows upload_2022-1-15_13-2-11.png both 230 volt and volt free, depending on boiler used. There is only one wireless thermostat I know about where both the base and remote are battery powered, that is the Nest e, as far as I am aware all others the base needs 230 volt power.

    My wall thermostat does not work as I want, however there is nothing wrong with the thermostat, so explain
     
  7. CBW

    CBW

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    I think what the OP meant was the display on the thermostat was coming on and going off - had a few go like this now, including a T3R.
     
  8. Zaina

    Zaina

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    The boiler is a worcester greenstar 2000 25kw boiler.

    The themostat is a Honeywell Home T3R Programmable Wireless Thermostat.

    If we swap the receiver like for like, is it possible utilising the backplate would we need to do any wiring? Is it possible to install ourselves or need to get someone in.

    The property is a 2 bedroom flat, boiler is in the kitchen.

    The themostat was switching on and off. We thought it was the battery that wad dead. We replaced battery but did not fix the issue.
    Hence why the new themostat was purchased. We tried to leave the old reciever but not pairing to the themostat.
     
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