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• 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 di-
rection (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).
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