Worcester 24SiII Installation And Servicing Instructions page 62

PROGRAMMER OPERATING INSTRUCTIONS
The programmer controls the operation of the central heating circuit. The domestic hot water is
permanently available upon demand and will take priority over the supply of heat to the system
during the demand.
Pressing the SET button repeatedly progresses you through the settings. To reset at any point
the YES button must be pressed, followed by the + and – buttons as necessary.
NOTE: The – button is also the YES button.
Check that the gas supply to the appliance is OFF and that the room thermostat, if fitted, is at
minimum to prevent the accidental operation of the appliance during the initial setting of the
programmer. It is not necessary to do this when making adjustments to the programmer at a
later date. Check that all taps and showers are shut.
Switch on the power supply.
TO SET THE CLOCK
Starting with the display showing the time of day press SET.
The display will ask SET CLOCK ?. If the clock display is not correct, press YES.
The display will show the current time and day with the day flashing.
Use the + and – buttons to change to the correct day. Press SET to lock in the day.
The display will show the hours flashing. Use the + and – buttons to set the hours (remember to
take into account AM or PM), press SET to lock in the hours.
Repeat the actions to set the minutes.
The display will show SET PROG?.
TO SET THE PROGRAMME
If you wish to change the programme press YES otherwise press SET twice to return to the run
mode with the standard programme.
If you pressed YES then the display will ask SET MON-FRI PROG?
If you want the weekday times to be the same press YES.
If you require a different time for each day press SET to access each day separately.
If you pressed YES then the display will show the first ON time for MON-FRI. Use the + and –
buttons to change the time as necessary.
Press SET to access the first OFF time.
Use the SET and + and – buttons to go through the programme and change as necessary.
When you press SET after the second OFF the display will ask SET MON PROG?.
If you wish set or modify the MON times use the YES button to access the times and the SET, +
and – buttons to change as necessary.
You can access each day in turn by pressing the SET button and only if you wish to change
anything should you press the YES button followed by the + and – buttons.
After Friday you have the chance to set SAT and SUN the same after which they are accessed
individually.
Pressing SET after the display SET SUN PROG? or the last SUN off time will show TEST? on the
display.
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