Having just managed to get my hands on an HM80, I was keen to find out how it worked with Evohome. I am also trying to see what the radio comms between the Evohome controller and the HM80 are but for the life of me I cannot see that on my HGI80. But that is a different issue.
I first had great difficulty binding the HM80 to the controller. I basically couldn't put the HM80 into pairing mode. The instructions say to hold the two buttons down for 4 secs, but no matter what I did I couldn't get it to start the pairing process. Now I think I have figured the trick to do that.
You have to basically press 1 button make sure the corresponding LED lights up, then press the second button. You will know that you have started the binding 4 sec timer, when NONE of the LEDs are lit while you are pressing both buttons. If even one of them is lit or comes on, then you have not pressed the buttons correctly or you have released them too soon. You then need to start again.
The same trick is to be used to clear all previous binding and reset the HM80 to factory defaults. You start off as though you are putting the HM80 into pairing mode, after 4 seconds the LED 4 starts to blink evenly on/off, keep the two buttons pressed for more than 10 seconds and then LED 4 will blink differently. When it's off longer than it's on, it has been reset. Again, NO other LED should be lit when you are doing either the binding or the resetting.
It took me so long to figure those two bits out. Hopefully this helps others.
Now to the bits that I don't understand.
In Evohome, there are 5 zone types that an actuator can be paired as. The manual tells you to use the "Mixing Valve" zone type for the HM80. The HM80 will not pair if the zone type is set to Zone Valve. But strangely it does pair with the Evohome if I set the zone type to "Underfloor Heating". However with Underfloor Heating, none of the Parameters for the HM80 can be set. But these parameters can be set when the zone type is correctly set to "Mixing Valve".
The Evohome instructions say
"The Mixing Valve Controller will not provide a heat demand to the boiler. If you want this zone to provide a heat demand change the Heating Type from 'MIXING VALVE' to 'ZONE VALVES' once the Mixing Valve controller is bound. There's no need to re-bind any device – The Mixing Valve Controller will still operate as intended and the evohome Controller will send the heat demand to the boiler."
I cannot get to work on my Evohome Wifi with the latest firmware. I have two issues with this instruction.
1. Keeping the zone as "Mixing Valve" I can see a Heat Demand in the System Summary, even though the instructions say it won't provide a heat demand.
2. If I change the zone type to "Zone Valve", the controller forces me to rebind the device but because the HM80 won't bind when the zone type is set to "Zone Valve", I land up with the zone that has the RF binding set to Not bound.
So has the manual not kept up with the firmware changes or am I doing something wrong?
I have also noticed that the HM80 takes several minutes to respond to any instruction from the controller. The BDR91s on the other hand seem to respond almost instantly. The consequence of this is that the Boiler is fired up via the OT Bridge, but the water is just circulating around the auto bypass until the HM80 finally opens.
Can anyone who has experience with the HM80 help explain what I am seeing or doing wrong.
I first had great difficulty binding the HM80 to the controller. I basically couldn't put the HM80 into pairing mode. The instructions say to hold the two buttons down for 4 secs, but no matter what I did I couldn't get it to start the pairing process. Now I think I have figured the trick to do that.
You have to basically press 1 button make sure the corresponding LED lights up, then press the second button. You will know that you have started the binding 4 sec timer, when NONE of the LEDs are lit while you are pressing both buttons. If even one of them is lit or comes on, then you have not pressed the buttons correctly or you have released them too soon. You then need to start again.
The same trick is to be used to clear all previous binding and reset the HM80 to factory defaults. You start off as though you are putting the HM80 into pairing mode, after 4 seconds the LED 4 starts to blink evenly on/off, keep the two buttons pressed for more than 10 seconds and then LED 4 will blink differently. When it's off longer than it's on, it has been reset. Again, NO other LED should be lit when you are doing either the binding or the resetting.
It took me so long to figure those two bits out. Hopefully this helps others.
Now to the bits that I don't understand.
In Evohome, there are 5 zone types that an actuator can be paired as. The manual tells you to use the "Mixing Valve" zone type for the HM80. The HM80 will not pair if the zone type is set to Zone Valve. But strangely it does pair with the Evohome if I set the zone type to "Underfloor Heating". However with Underfloor Heating, none of the Parameters for the HM80 can be set. But these parameters can be set when the zone type is correctly set to "Mixing Valve".
The Evohome instructions say
"The Mixing Valve Controller will not provide a heat demand to the boiler. If you want this zone to provide a heat demand change the Heating Type from 'MIXING VALVE' to 'ZONE VALVES' once the Mixing Valve controller is bound. There's no need to re-bind any device – The Mixing Valve Controller will still operate as intended and the evohome Controller will send the heat demand to the boiler."
I cannot get to work on my Evohome Wifi with the latest firmware. I have two issues with this instruction.
1. Keeping the zone as "Mixing Valve" I can see a Heat Demand in the System Summary, even though the instructions say it won't provide a heat demand.
2. If I change the zone type to "Zone Valve", the controller forces me to rebind the device but because the HM80 won't bind when the zone type is set to "Zone Valve", I land up with the zone that has the RF binding set to Not bound.
So has the manual not kept up with the firmware changes or am I doing something wrong?
I have also noticed that the HM80 takes several minutes to respond to any instruction from the controller. The BDR91s on the other hand seem to respond almost instantly. The consequence of this is that the Boiler is fired up via the OT Bridge, but the water is just circulating around the auto bypass until the HM80 finally opens.
Can anyone who has experience with the HM80 help explain what I am seeing or doing wrong.
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