Confusion over UFH controls since installing Hive
Discussion
Hello. We have 2 zones of UFH in the new part of the house (one upstairs and one downstairs. The older part of the house has normal radiator central heating. A few years ago we installed Hive to combine boiler and since then the controllers for UFH do not seem to make a difference.
Please see pics and do ask further questions!
![](https://forums-images.pistonheads.com/248240/202502174874376?resize=720[/img]</a> <a href="https://forums-images.pistonheads.com/248240/202502174876318" Target="_blank" >[img]https://forums-images.pistonheads.com/248240/202502174876318?resize=720)
Please see pics and do ask further questions!
You'll probably need to give more info than that. One of your pictures isn't working so that may be the key. Generally UFH will work on the basis of an actuator that is controlled by the thermostat - if the thermostat calls for heat, the actuator on the manifold opens the valve for the relevant zone, the boiler fires, and the pump on the manifold starts up. When the room thermostat decides things are warm enough, the actuator closes the valve and it all stops.
Is the heating on all the time in the UFH bits of the house? Something must be controlling the heat, if it isn't your Hive.
Is the heating on all the time in the UFH bits of the house? Something must be controlling the heat, if it isn't your Hive.
b14 said:
You'll probably need to give more info than that. One of your pictures isn't working so that may be the key. Generally UFH will work on the basis of an actuator that is controlled by the thermostat - if the thermostat calls for heat, the actuator on the manifold opens the valve for the relevant zone, the boiler fires, and the pump on the manifold starts up. When the room thermostat decides things are warm enough, the actuator closes the valve and it all stops.
Is the heating on all the time in the UFH bits of the house? Something must be controlling the heat, if it isn't your Hive.
[img]https://forums-images is .pistonheads.com/248240/202502175240827?resize=720[/img]Is the heating on all the time in the UFH bits of the house? Something must be controlling the heat, if it isn't your Hive.
jinkster said:
. A few years ago we installed Hive to combine boiler and since then the controllers for UFH do not seem to make a difference.
What do you mean by "the controllers for UFH" ? And what do you mean by "do not make a difference" ? Is your UFH not coming on at all, coming on at the wrong time, only coming on with the other heating, only coming on with hot water... ?
Agree with all of the above questions. The only thing I can really tell from your pictures is that the install isn't the best at least judging by the quality of the manifold installation and the pipework. Difficult to see why you'd have two separate manifolds rather than one manifold that is zoned with separate actuators.
If I was to guess, I'd imagine that the pumps and the boiler are activated by thermostats somewhere, that aren't your Hive ones - assuming that you are saying that your Hive thermostat doesn't seem to influence the operation of the UFH. They must be controlled by something or else they'd be always on, or always off. Even a basic timer but I'd really hope that isn't the case for a UFH system.
Finally I'd maybe turn down the mixer from "max" to something like 45 degrees, otherwise you'll just be putting too much heat through the floor.
If I was to guess, I'd imagine that the pumps and the boiler are activated by thermostats somewhere, that aren't your Hive ones - assuming that you are saying that your Hive thermostat doesn't seem to influence the operation of the UFH. They must be controlled by something or else they'd be always on, or always off. Even a basic timer but I'd really hope that isn't the case for a UFH system.
Finally I'd maybe turn down the mixer from "max" to something like 45 degrees, otherwise you'll just be putting too much heat through the floor.
outnumbered said:
jinkster said:
. A few years ago we installed Hive to combine boiler and since then the controllers for UFH do not seem to make a difference.
What do you mean by "the controllers for UFH" ? And what do you mean by "do not make a difference" ? Is your UFH not coming on at all, coming on at the wrong time, only coming on with the other heating, only coming on with hot water... ?
If I turn the thermostat from the UFH to frost setting the UFH still comes on if hive demand the boiler to be on.
Hope this makes a bit more sense.
b14 said:
Agree with all of the above questions. The only thing I can really tell from your pictures is that the install isn't the best at least judging by the quality of the manifold installation and the pipework. Difficult to see why you'd have two separate manifolds rather than one manifold that is zoned with separate actuators.
If I was to guess, I'd imagine that the pumps and the boiler are activated by thermostats somewhere, that aren't your Hive ones - assuming that you are saying that your Hive thermostat doesn't seem to influence the operation of the UFH. They must be controlled by something or else they'd be always on, or always off. Even a basic timer but I'd really hope that isn't the case for a UFH system.
Finally I'd maybe turn down the mixer from "max" to something like 45 degrees, otherwise you'll just be putting too much heat through the floor.
Thanks for the reply. If Hive demands the heating on then the UFH ignores the thermostat and turns on. If Hive switches the boiler off and the UFH thermostat depends on then it will go off. Hive seems to be the controlling source and unsure how to get around that.If I was to guess, I'd imagine that the pumps and the boiler are activated by thermostats somewhere, that aren't your Hive ones - assuming that you are saying that your Hive thermostat doesn't seem to influence the operation of the UFH. They must be controlled by something or else they'd be always on, or always off. Even a basic timer but I'd really hope that isn't the case for a UFH system.
Finally I'd maybe turn down the mixer from "max" to something like 45 degrees, otherwise you'll just be putting too much heat through the floor.
How do I change the temp to 45c - think they are just numbers. I guess set it somewhere in the middle.
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