11
Start-up
The union nut attached to the radiator thermostat can be
used universally and without accessories for all HERZ ther-
mostatic valves with a thread size of M28 x 1.5mm. For adap-
tors to use HERZ ETKF+ with other manufacturers see HERZ
product rnge or the homepage www.herz.eu.
5.3.1 Removing the old dial
Rotate the thermostat dial to the maximum value (
1
) (an-
ti-clockwise). The thermostat dial then no longer presses
against the valve spindle, making it easier to remove.
There are different ways of fixing the position of the ther-
mostat dial:
•
Union nut:
Unscrew the union nut in an anticlockwise di-
rection (
2
). The thermostat head can then be removed (
3
).*
•
Snap-on fastenings:
Thermostat dials that have been at-
tached using this method can be easily released by giving
the lock/union nut a slight turn in the anticlockwise direc-
tion (
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
).*
•
Threaded connection with set screw:
Loosen the set screw
and remove the thermostat head (
3
).*
* Adapter to ETKF+ has to be ordered separately.
