OPERATING YOUR ST9400A
Choosing the Operating Mode (for Heating and/or Hot Water)
The operating mode may only be changed when the slider is set
to the RUN position.
A green INDICATOR LAMP shows when the heating or hot
water is switched ON.
Two MODE buttons are provided to select the Operating Mode
and therefore how the heating and hot water are controlled.
Heating has four possible Operating Modes; these are OFF, AUTO, ONCE, CONT.
Pressing the heating MODE button scrolls round these modes in sequence, and the
display indicates which mode is currently active.
• OFF mode
The heating will remain OFF.
• AUTO (Automatic) mode
The heating will be switched ON and OFF according to the heating programme.
• ONCE mode
The heating will come ON at the first programmed ON time, and go OFF at the
last programmed OFF time.
• CONT (Continuous) mode
The heating will remain ON continuously.
The hot water MODE button operates in the same way as described above for the
heating MODE button.
DAY/TIME
HOT WATER
HEATING
RUN
HOT WATER HEATING HOT WATER HEATING
