Modifying The Heating Programme; Disabling / Enabling Time Periods (For Heating And/Or Hot Water) - Honeywell Y9420H Sundial RF2 Pack 2 User Manual

Exiting HOT WATER Programming Mode:
To exit HOT WATER programming mode, move the slider to the RUN position. This
can be done at any time during the programming process, and any changes made
and confirmed with the
Note: If the unit is left in HOT WATER Programming mode for more than 10 minutes without
the slider being moved or any buttons pressed, the message 'MOVE SLIDER' will be
displayed. Press a button to finish programming, or move the slider to the RUN position.

Modifying the Heating Programme

The heating programme has three pairs of ON/OFF switching times per day. Each
time can be set between 3.00 am and 2.50 am (on the next day) to allow you to
programme the heating to stay on past midnight, if required.
a. Move the slide switch to the HEATING position. 'SET HEATING' will show briefly
to verify this action.
DAY/TIME
HOT WATER
HEATING
RUN
b. Now follow the same procedure to set the times as described in 'Modifying the
Hot Water Programme' (page 9) steps b. to i.
Exiting HEATING Programming Mode:
To exit HEATING programming mode, move the slider to the RUN position. This can
be done at any time during the programming process, and any changes made and
confirmed with the
Note: If the unit is left in HEATING Programming mode for more than 10 minutes without
the slider being moved or any buttons pressed, the message 'MOVE SLIDER' will be
displayed. Press a button to finish programming, or move the slider to the RUN position.
Disabling / Enabling Time Periods
To disable any of the time periods ON 1 to OFF 1, ON 2 to OFF 2, or ON 3 to OFF 3,
simply set the ON time and its paired OFF time to the same time, and the programme
will just ignore them.
To re-enable the time period, simply set the two ON and OFF times to be different.
button will have been saved.
button will have been saved.
PROGRAMMING YOUR ST9420C
HOT WATER
(for Heating and/or Hot Water)
HEATING
11