The Extra Hour Function (For Heating And/Or Hot Water); The Holiday Function - Honeywell Y9420H Sundial RF2 Pack 2 User Manual

The Extra Hour Function
The EXTRA HOUR buttons allow you to switch the heating or hot water ON for up to
3 extra hours without altering the programme. Pressing either button once will give
one extra hour. The LoT™ Display will display the message '+ 1 HOUR', to confirm
the button has been pressed.
When the heating or hot water are OFF (the
ing an EXTRA HOUR button switches the heating or hot water ON for just one hour.
When the heating or hot water are ON (the
pressing an EXTRA HOUR button extends the programmed ON period by one hour.
Further presses of the EXTRA HOUR buttons will increase the extra hour period by
one hour for each button press, up to a maximum of 3 hours. The LoT™ Display will
continue to provide information on the extra hour status.
To cancel the extra hours, just keep pressing the EXTRA HOUR button until the
'CANCELLED' message appears on the LoT™ Display.

The Holiday Function

The Holiday function allows you to switch off your heating and hot water for a specified
number of days (from 1-99 days). This lets you save energy and related costs when
you are away from home, but resumes normal operation on the day of your return.
During this period heating will operate at the OFF (frost protection) set temperature
and the hot water will remain off.
To set the Holiday function:
a. Ensure the slider is in the RUN position, then press the HOLIDAY button once.
The message 'SET HOLIDAY' will appear briefly, followed by 'SET DAYS AWAY'.
b. Use the
will show the number of days, and this number will be flashing to indicate it can be
changed. The day of the week will also keep changing to show the day you return.
c. If you have made a change to the number of days, the message 'DAYS AWAY OK ?'
will appear. Press the green
d. The message 'SAVED' will be displayed for a few seconds, followed by the date you
return, to enable you to check you have programmed the holiday function correctly.
e. During the holiday period, the LoT™ Display will show the message 'ON
HOLIDAY' and the display will count down the number of days till you return.
To cancel the Holiday function:
f. To cancel the Holiday function, just press the HOLIDAY button again. The LoT™
Display will show 'CANCELLED' and the unit will return to normal operation.
Note: while setting the Holiday function, if there is a gap of more than 1 minute
between button presses, the function will cancel itself automatically and return to
normal operation.
or buttons to set the number of days you will be away. The display
OPERATING YOUR ST9420C
(for Heating and/or Hot Water)
or symbols are not displayed), press-
button to confirm your selection.
or symbols are displayed),
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