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Feb 17, 2021
2
2
3
Rugby, United Kingdom
Member Type
DIY or Homeowner
Good afternoon.
We have just finished our single storey extension and due to costs, I have done quite a lot of the work myself (GRP roof, kitchen fitting, joinery etc)
I also laid all of our underfloor heating pipes and connected to the UFH manifold having spent hours researching both online forums and youtube.
We're now at the point where the last part of the jigsaw is to actually commission the UFH and get the pump, actuators and thermostat and I am drawing a blank...

The system partially installed is a 2 port manifold which runs two loops covering 20 and 30 m2. one area is the kitchen and the other is the dining living room area. both areas are in the same overall area which is why we only have 1 thermostat.

My question is around the installation of the actuators, pump and thermostat. how should we be looking to wire it all up?
I didn't think we needed a control center as both loops should be controlled from 1 thermostat in the same area.
Our electrician is due back to finish some snags and will be doing the work however he was a bit flummoxed by it all...

For reference, our combi boiler is brand new and on the next wall to the manifold and that is ran by a wireless thermostat, could we wire the pump into the wireless stat receiver box and run it off the main CH system?

Any help and advice would be greatly received.
 

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As above 2 zone valves each with its own room thermostat.
You need a room thermostat for the underfloor that has backset temperature . Normally backset to 4 c below day temperature.
Bring the underfloor up to temperature very slowly preferably over several days
 
If all the underfloor is one area, you don’t need actuators. Just the room stat and the 2port valve is enough to control it. Along with the blending valve and manual flow control valves which will be part of the manifold.
 
Thanks everyone for the replies. So in essence as a minimum I will need to have a 2 port valve fitted, open the decorator caps on the return and then use the blending valve to make sure the temp is right.
So my next question is who would be best suited to fit the 2 port valve, wire the pump and the stat? As i said the electrician on the job isnt too clued up so would i be best speaking to a heating engineer? thanks again.
 
  • Like
Reactions: plumbingdoctor
Good afternoon.
We have just finished our single storey extension and due to costs, I have done quite a lot of the work myself (GRP roof, kitchen fitting, joinery etc)
I also laid all of our underfloor heating pipes and connected to the UFH manifold having spent hours researching both online forums and youtube.
We're now at the point where the last part of the jigsaw is to actually commission the UFH and get the pump, actuators and thermostat and I am drawing a blank...

The system partially installed is a 2 port manifold which runs two loops covering 20 and 30 m2. one area is the kitchen and the other is the dining living room area. both areas are in the same overall area which is why we only have 1 thermostat.

My question is around the installation of the actuators, pump and thermostat. how should we be looking to wire it all up?
I didn't think we needed a control center as both loops should be controlled from 1 thermostat in the same area.
Our electrician is due back to finish some snags and will be doing the work however he was a bit flummoxed by it all...

For reference, our combi boiler is brand new and on the next wall to the manifold and that is ran by a wireless thermostat, could we wire the pump into the wireless stat receiver box and run it off the main CH system?

Any help and advice would be greatly received.

Thanks everyone for the replies. So in essence as a minimum I will need to have a 2 port valve fitted, open the decorator caps on the return and then use the blending valve to make sure the temp is right.
So my next question is who would be best suited to fit the 2 port valve, wire the pump and the stat? As i said the electrician on the job isnt too clued up so would i be best speaking to a heating engineer? thanks again.
Hello

the 2 port valve wire the pump and the stat . this two port valve is design to make the heating zone being isolate to the motor this can control and regulate the flow of water
 

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    2 port valve wiring.png
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