Honeywell ZG 215N Operation And Putting Into Service page 11

Timer with week program
The timer has a changeable dial.
With the week program dialing a different heating program for
each weekday is possible.
The dial is prepared ex factory for the day program and, if required,
it can be changed to week program (see installation instructions).
Setting the right time
To set the time, the time dial is to be placed on the trip pins and
7
turned clockwise until the indication on the setting marker
matches with the current time.