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Honeywell ST9400S Manual To The Use
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GUIDE TO THE USE OF THE ST9400S PROGRAMMER:
The purpose of the Programmer is to control the times when the heating and hot water can be switched on.
Normal Use:
Lift the flap to make sure the Slider is in the RUN position.
Also make sure that both hot water and heating are operating in AUTO or
ONCE mode, by pressing the MODE buttons repeatedly until the display
shows AUTO or ONCE.
AUTO means on and off twice each day, following the programme.
ONCE means coming on at the first programme time then off at the last
programme time.
To turn the hot water and heating OFF:
(1) Keep pressing the hot water MODE button until the display shows that
hot water is OFF. If the hot water was on, the light will turn off.
(2) Keep pressing the heating MODE button until the display shows that
heating is OFF. If the heating was on, the light will turn off.
To turn the hot water and heating ON:
(1) Keep pressing the hot water MODE button until the display shows
CONT (this is short for continuous). The hot water light will turn on.
The hot water will not turn off in this position.
(2) Keep pressing the heating MODE button until the display shows
CONT (this is short for continuous). The heating light will turn on.
The heating will not turn off in this position.
Temporary Overrides to the Set Programme:
To turn the hot water ON press the hot water OVERRIDE button – the light
will turn ON, unless the hot water is operating in the OFF mode.
To turn the hot water OFF press the hot water OVERRIDE button again
– the light will turn OFF.
This button will only work in the AUTO or ONCE modes. It will NOT work
in the OFF or CONT modes.
At the next SET time the Programmer will go back to automatic
operation.
(The same applies to the heating OVERRIDE button)
For a temporary boost of heating or hot water, press the corresponding
EXTRA HOUR button.
Pressing once brings the heating or hot water ON for 1 hour.
Press twice for 2 hours extra, three times for 3 hours extra.
Pressing again will turn the heating OFF.
This button works in the AUTO, ONCE, and OFF modes. It will NOT work
in the CONT mode.
If the heating or hot water is already ON, pressing the corresponding
EXTRA HOUR button will add the extra hours to the end of the current
ON period.
For guidance on the operation of the other buttons please refer to the complete user instructions supplied with the
product.
Copyright©Honeywell
HOT WATER
EXTRA HOUR
OVERRIDE
NEXT
ST9400S
MODE buttons
HOT WATER
HEATING
(1)
HOT WATER
EXTRA HOUR
OVERRIDE
Hot Water
OVERRIDE button
HOT WATER
EXTRA HOUR
OVERRIDE
Hot Water
EXTRA HOUR button
EXTRA HOUR button
HEATING
EXTRA HOUR
OVERRIDE
DAY/TIME
OK
HOT WATER
HEATING
RUN
Slider
(2)
HEATING
EXTRA HOUR
OVERRIDE
Heating
OVERRIDE button
HEATING
EXTRA HOUR
OVERRIDE
Heating

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Summary of Contents for Honeywell ST9400S

  • Page 1 GUIDE TO THE USE OF THE ST9400S PROGRAMMER: The purpose of the Programmer is to control the times when the heating and hot water can be switched on. Normal Use: HOT WATER HEATING Lift the flap to make sure the Slider is in the RUN position.
  • Page 2 BOILER SERVICE REMINDER: By Law, your gas boiler should be inspected once a year to ensure it is operating safely. Your ST9400S Programmer has a range of features designed to help make sure this service is carried out at the correct time.