Honeywell CM901 - Manual (Page 7)

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PROGRAMMING THE CM901
Disabling / Enabling Time Periods
The thermostat has 6 periods that can be programmed, but you may not need all of
these switch points for your heating requirements. Therefore, any period from 2 to 6
can be disabled or enabled as follows:
To disable time periods:
Go to the desired period ( 2 to 6 ) by moving the slider switch to the PROG
position, then using the and buttons to navigate, ensuring the correct
period is highlighted with the flashing square symbol. Press and hold the
button for at least 2 seconds and the display will indicate the period has been
removed from the program.
To enable time periods:
Navigate to the disabled period by moving the slider switch to the PROG
position, then using the and buttons. Once selected ‘DISABLED’ will be
displayed. Press and hold the button for at least 2 seconds and ‘ENABLED’ will
be displayed for a moment before returning to normal programming mode.