The Radiator Valves easily replace the majority of existing TRVs to give you the ability to schedule each room independently, with any plumbing being required.

Each Radiator Valve comes with two adaptors. The two adaptors fit the Radiator Valve onto an M30x1.5mm thread (the UK standard) or a Danfoss RA fitting (the adaptor with the grub screw). To mount the Radiator Valve:

1. Attach the correct adaptor to the base of the Radiator Valve. The image below shows the M30 adaptor being fitted.
   
2. Place 2 x AA batteries in the valve, a ‘21’ or ‘4’ should appear on the screen.
   

3. Press and hold the middle button for 3 seconds until an 'M' appears on the screen, then press the middle button once more. The 'M' will begin to flash on the screen, the valve will buzz and the plunger in the underside of the valve will retract. The valve is now in Mount Mode.
   

   The Valve must be in mount mode when being attached to the radiator.

4. Screw the valve down onto the radiator if using the M30 x 1.5mm adaptor, or attach the RA adaptor & valve onto the radiator & tighten up the grub screw.
    

   If using the Danfoss RA adapter make sure that the grub screw is done up very tight as the adapters can work loose over time. 

5. Press and hold the middle button for 3 seconds until the valve starts to buzz and  ‘21’ or ‘4’ appears on the screen.
   

   Sometimes when you press a button on the valve it can take 30 seconds for the screen to react. This is normal as the valve may be communicating with the Genius Hub at the time.