13
OPERATING YOUR ST9420C
The Extra Hour Function
(for Heating and/or Hot Water)
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
or
symbols are not displayed), press-
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
or
symbols are displayed),
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 or buttons to set the number of days you will be away. The display
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 button to confirm your selection.
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.
Summary of Contents for Y9420H Sundial RF2
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