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HOT WATER HEATING
EXTRA HOUR
OVERRIDE
EXTRA HOUR
OVERRIDE
NEXT
DAY
COPY
DAY
HOLIDAY
OK
NEXT
DAY/TIME
HOT WATER
HEATING
RUN
ST9400C
Contents
WHAT IS A PROGRAMMER?
General Description ........................................................................................3
The way to use a Programmer ........................................................................3
GETTING STARTED WITH YOUR ST9400C
Step 1: Setting the Date & Time .....................................................................4
Step 2: Running a Built-in Programme ...........................................................5
PROGRAMMING YOUR ST9400C
The Built-in Programmes ................................................................................6
Your Personal Programme ..............................................................................6
Reviewing the Programme Times ...................................................................7
Modifying the Hot Water Programme .............................................................7
Copying one day’s Programme to another day .....................................8
Programming a Different Day.................................................................8
Exiting HOT WATER Programming Mode ..............................................9
Modifying the Heating Programme .................................................................9
Exiting HEATING Programming Mode ...................................................9
Disabling/Enabling Time Periods ...................................................................9
OPERATING YOUR ST9400C
Choosing the Operating Mode .....................................................................10
Override the Operation Without Changing the Programmes........................10
The Extra Hour Function ...............................................................................11
The Holiday Function ....................................................................................11
FINE TUNING YOUR ST9400C
Changing From AM/PM Time display to the 24-hour Clock .........................12
Changing the Installer Parameters ...............................................................12
FAQ & TROUBLESHOOTING
How do I set the time only, if the ST9400C clock is not correct? ..................14
What do I do when the clocks go back in October and forward in March? .14
What should I do if I get ‘lost’ while programming the ST9400C? ................14
What happens if there is a power failure? ....................................................14
Troubleshooting Guide .................................................................................15
MINI-PROGRAMMER OPERATING INSTRUCTIONS
(Installer to tick if configured in this way)
What is a Mini-Programmer?.........................................................................16
Modifying the Heating & Hot Water Programme ..........................................16
Exiting HEATING & HOT WATER Programming Mode .................................16
Disabling/Enabling Time Periods .................................................................17
Choosing the Operating Mode .....................................................................17
Override and Extra Hour Functions ..............................................................17
Other Functions ............................................................................................17
CONFIGURATION & SERVICE DATA
Configuration Data (to be completed by Installer) .......................................18
Boiler & System Service Log ........................................................................19
ST9400C Controls Layout
Hot Water Operating Mode Indicator
Time Display
LoT™ Technology Display
Programme Time Markers
Day of Week Indicator
Heating Operating Mode Indicator
Heating Extra Hour Button
Heating Indicator Lamp
Heating Override Button
Slider
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
19
18
Heating Operating Mode Button
OK/Next Button
Clock – and + Buttons
Hot Water Operating Mode Button
Holiday Button
Copy Day Button
Next Day Button
Hot Water Override Button
Hot Water Indicator Lamp
Hot Water Extra Hour Button
20
19
18
17
16
15
20
1 2 3 54 6
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9
7
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12
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19
CONFIGURATION & SERVICE DATA
Boiler & System Service Log
The space below can be used to provide a record of boiler & system services and
the names and contact numbers of the Installer and Service Personnel.
This information is important for a Home Information Pack.
Service/Installation
Date
Installation/Service
Engineer
Telephone Number /
Contact Details
Keep this document in a Home Information Pack
2


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