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• The advance or override will last until the next
programme change.
• To switch to permanent ON or OFF, press the
triangle hand button ‘
’ until either ON or OFF
(as appropriate) is on the display without the
AUTO symbol.
• The TG77 will now run continuously ON or OFF.
8. Random switching mode
The Random switching mode allows a delay for both
start and finish times of an ON period. The random
delay varies anywhere between 2 and 32 minutes to
give the impression that a standard time switch is
not in use.
• To activate the random switching feature, press
the ‘RND’ button once when in normal operating
mode. The ‘RND’ symbol will appear on the display.
• To deactivate the random switching feature, press
the ‘RND’ button once again. The ‘RND’ symbol
will disappear from the display.
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