Turning Off An HR92

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  • G4RHL
    Automated Home Legend
    • Jan 2015
    • 1580

    Turning Off An HR92

    Is there a way to turn an individual HR92 off other than removing it and turning in the black clogged wheel? There is a setting if you turn the top of the HR92 all the way back beyond 5C, headed “Off”. It does not seem to work as the next set point reached overrides it. It appears the route is either delete the zone or unpair the HR92 which most would not want to do, or just remove the HR92 but then you need to ensure it has a setting that won’t fire up the boiler or put it in a room where the temperature will always be greater than the set points for the removed HR92.
  • Billywizzo
    Automated Home Jr Member
    • Nov 2020
    • 48

    #2
    I have the one in my spare room set to off, I just turned until it said off and that is where it has stayed.
    I don’t believe I did anything on the controller to ensure it stayed in the off position.
    Just wondered if you have anything else setup in that room to control the heating like a separate thermostat as that may be overriding the valve.

    Comment

    • G4RHL
      Automated Home Legend
      • Jan 2015
      • 1580

      #3
      No, it is only controlled by its schedule. Manually setting the control to off does not it seems override the schedule. I set it to off last night but heard the boiler fire up during the night and it will be this one radiator. It is set to 5c in the schedule and where it is can drop below that during the night. I checked this morning and the word “off” no longer shows. Clearly it is the same as the manual override to adjust a temperature, it only lasts until the next set point.

      In due course this radiator is to be removed permanently so in the long term not a big issue. It does seem though that if I want it off I delete the room, remove the TRV and close the valve or if I want to retain the facility put the HR92 in a drawer in a different room where it will have no affect on anything.

      Comment

      • CT1
        Automated Home Guru
        • Apr 2016
        • 189

        #4
        Would removing the batteries help?

        Comment

        • Billywizzo
          Automated Home Jr Member
          • Nov 2020
          • 48

          #5
          Looking at my controller, that room is set to 5c and set to permanent and the HR92 always reads off.
          Have you set the room to be permanently at 5c on the controller.

          Comment

          • DBMandrake
            Automated Home Legend
            • Sep 2014
            • 2361

            #6
            Originally posted by G4RHL View Post
            No, it is only controlled by its schedule. Manually setting the control to off does not it seems override the schedule. I set it to off last night but heard the boiler fire up during the night and it will be this one radiator. It is set to 5c in the schedule and where it is can drop below that during the night. I checked this morning and the word “off” no longer shows. Clearly it is the same as the manual override to adjust a temperature, it only lasts until the next set point.
            I've tested OFF on HR92's many times and OFF means OFF.

            It will completely ignore the schedule and remote manual overrides, furthermore OFF disables frost protection. (I tested this placing one in a freezer....it did not call for heat whereas just setting it to 5C did)

            I've even posted about this on here in the past to warn folks that OFF disables frost protection. So I have absolutely no idea why yours is behaving the way you describe.

            The only thing I can think of is the HR92 is perhaps rebooting due to a poor battery contact - this would disable OFF mode and revert to 20C, then your schedule would override it back to 5C again.

            If you really want to disable a radiator for example to remove it to do painting I would just remove the HR92 and screw a painters cap over it. Turning the black wheel isn't sufficient - on my system the spring in the valve bodies is strong enough to spin the black wheel back to the fully open position as soon as I let go of it...
            Last edited by DBMandrake; 24 January 2021, 02:00 PM.

            Comment

            • G4RHL
              Automated Home Legend
              • Jan 2015
              • 1580

              #7
              Yes, but as the temperature drops below that the boiler fires up.

              Comment

              • G4RHL
                Automated Home Legend
                • Jan 2015
                • 1580

                #8
                Originally posted by DBMandrake View Post
                I've tested OFF on HR92's many times and OFF means OFF.

                It will completely ignore the schedule and remote manual overrides, furthermore OFF disables frost protection. (I tested this placing one in a freezer....it did not call for heat whereas just setting it to 5C did)

                I've even posted about this on here in the past to warn folks that OFF disables frost protection. So I have absolutely no idea why yours is behaving the way you describe.

                The only thing I can think of is the HR92 is perhaps rebooting due to a poor battery contact - this would disable OFF mode and revert to 20C, then your schedule would override it back to 5C again.

                If you really want to disable a radiator for example to remove it to do painting I would just remove the HR92 and screw a painters cap over it. Turning the black wheel isn't sufficient - on my system the spring in the valve bodies is strong enough to spin the black wheel back to the fully open position as soon as I let go of it...
                I'll check the contacts for the battery but there is no doubt the Off setting was overridden by the next set point. It is not going to be a big issue though as shortly our boiler is to be replaced as well as all the radiators and this particular one will not be reinstalled. it would now be contrary to Building Regulations. As to boiler I am down to a Worcester Bosch 8000 or an Intergas Xtreme. Both about the same price. The Bosch installer is 1.25 miles from me the Intergas one isn't. If I did not have the Evohome system in place already I would probably go Bosh for their equivalent system is much nicer. It is also Apple compatible. They have moved with the times. Honeywell has not caught up. Will it?

                Comment

                • Billywizzo
                  Automated Home Jr Member
                  • Nov 2020
                  • 48

                  #9
                  15AF6303-E84E-46D2-826B-9929EF92168E.jpg
                  The user guide states that if you turn the HR92 to off it will stay off.
                  As stated maybe check the batteries, when they are close to dying, my HR92’s tend to go to override at 20c until I change them, no low battery warning just keep resetting themselves to 20c
                  Last edited by Billywizzo; 24 January 2021, 02:44 PM.

                  Comment

                  • G4RHL
                    Automated Home Legend
                    • Jan 2015
                    • 1580

                    #10
                    My answer to that from my experience is b...cks! Must check the contacts though. The batteries are a month old. I wonder if it’s a feature that has always been defective but nobody uses it so it has not surfaced before.

                    Comment

                    • Billywizzo
                      Automated Home Jr Member
                      • Nov 2020
                      • 48

                      #11
                      It works on mine, I turned it off and it always is off.

                      Comment

                      • G4RHL
                        Automated Home Legend
                        • Jan 2015
                        • 1580

                        #12
                        Originally posted by Billywizzo View Post
                        It works on mine, I turned it off and it always is off.
                        I think what is causing it is the inbuilt frost protection. The HR92 reads off at present, I again set it to off this morning, but I can feel some heat in the radiator so it has been on despite the HR92 showing off. Temperatures have been below 5C.

                        Comment

                        • DBMandrake
                          Automated Home Legend
                          • Sep 2014
                          • 2361

                          #13
                          Originally posted by G4RHL View Post
                          I think what is causing it is the inbuilt frost protection. The HR92 reads off at present, I again set it to off this morning, but I can feel some heat in the radiator so it has been on despite the HR92 showing off. Temperatures have been below 5C.
                          Frost protection is disabled in OFF mode. I've tested this before more than once with an HR92 screwed onto a spare valve body thrown into the freezer. Honest.

                          Are you sure that your valve body just isn't closing properly so there is a small amount of water leakage ? Perhaps enable Stroke 1 mode on that HR92 so that it pushes the valve closed harder and see if it still happens?

                          Comment

                          • DBMandrake
                            Automated Home Legend
                            • Sep 2014
                            • 2361

                            #14
                            Originally posted by Billywizzo View Post
                            It works on mine, I turned it off and it always is off.
                            Same here, if it's set to OFF it ignores the schedule. Our spare room got set to OFF accidentally one day and it was several days later that I realised it was never heating despite the schedule. The control panel shows the expected set point but the room just never heats. You have to check on the HR92 itself to see that it is set to OFF mode.

                            Comment

                            • G4RHL
                              Automated Home Legend
                              • Jan 2015
                              • 1580

                              #15
                              Originally posted by DBMandrake View Post
                              Same here, if it's set to OFF it ignores the schedule. Our spare room got set to OFF accidentally one day and it was several days later that I realised it was never heating despite the schedule. The control panel shows the expected set point but the room just never heats. You have to check on the HR92 itself to see that it is set to OFF mode.
                              Done that. It has shown “off” all day. The Control Panel showed an override until 22:30 (a set point) with a set temperature of 5.5C now past that, no override shown, the set points on the Panel remain as before but the HR92 is turned off and says “off”. The radiator has been hot though. Outside temperature is currently -2.5C and the room the rad is in is 3.5C, the HR92 though is sending back that the temperature is 10C. Not surprising, the radiator has been on when it shouldn’t have been and of course the HR92 gets its temperature from where it is on the radiator. A separate thermostat in the room some distance away shows it as 3.5c. I always find there is a difference between what the HR92s say and what a separate thermostat in the room elsewhere says. For that reason in two rooms I use the round thermostat as the sensor. I will try swapping the HR92 with another and see if that makes a difference.

                              Comment

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