HomeMatic HmIP-eTRV-B-UK Mounting Instruction And Operating Manual page 57

By means of the adapter in the delivery, the device can be
installed also on radiator valves of type Danfoss RA (see
"5.2.2 Danfoss RA adapter" on page 58).
5.2.1 Mounting the radiator thermostat
In case of visible damage of the existing radiator,
valve or heating pipes, consult a specialist.
Remove the old thermostat dial from your radiator valve.
• Rotate the thermostat dial to the maximum value
(1) anti-clockwise (see figure 6). The thermostat
dial then no longer presses against the valve
spigot, making it easier to remove.
There are different ways of fixing the position of the
thermostat dial:
• Union nut: Unscrew the union nut in an
anticlockwise direction (2). The thermostat head
can then be removed (3).
• Snap-on fastenings: Thermostat dials that have
been attached using this method can be easily
released by giving the lock/union nut a slight turn
in the anticlockwise direction (2). The thermostat
head can then be removed (3).
• Compression fitting: The thermostat dial is held
in place by a mounting ring which is held together
with a screw. Loosen this screw and remove the
thermostat head from the valve (3).
Start-up
57