In order to run the heat pump and start to slowly dry out the house, we needed to make sure the manifolds were connected for the underfloor heating and would operate correctly. On the ground floor the underfloor system runs “open” without any room stats. Upstairs each bedroom has a room stat which sends it’s signal to an actuator on the valve for it’s “loop”.  

 The actuators are the little white hoods you can see on the manifold. So the room stats have been put in place temporarily while the pump is run and set at a low level for a week or so to start the drying out of the house.