Honeywell ST9100C User Manual
ST9100C – User Guide
7 Day Timer, 1 channel, 3 on/off per day
Honeywell Control Systems Ltd.
Arlington Business Park,
Bracknell
Berkshire
RG12 1EB
Technical Help Desk: 08457 678999
www.honeywelluk.com
50022737-002 A
© 2007 Honeywell International Inc.
Features
Easy to use slider and buttons combined with ‘LoT’™ Technology and an
‘OK’ button, allows you to confi rm changes and stay in control.
LoT™ Technology provides you with informative ‘on-screen’ feedback and operational
assistance as and when required.
Extra Large LCD (Liquid Crystal Display) with Backlight provides added user
friendliness and clearer viewing – even in the dark.
7-day Programmes let you choose settings built into ST9100C for each day of the
week to match your lifestyle, while maximising energy savings, or alter them to your
personal settings.
Automatic Summer/Winter Time Change will adjust the clock forward and backward
automatically when the clocks change, saving you having to change your ST9100C
every time.
Built-in Memory holds your programme indefi nitely - even if the mains power fails.
Energy Effi ciency and the Environment
Home energy use is responsible for more than ¼ of the total UK carbon emissions
which contribute to climate change. Heating and hot water systems based on
boilers account for of this fi gure, so it is important to understand how your
controls can help to maximize energy effi ciency while maintaining your comfort.
Your Timer should be used in conjunction with appropriate temperature controls. In
order to save energy the following general points should be observed:
1. Ensure your system contains a room ther mostat and a hot water thermostat,
and that both are set to appropriate temperature levels: typically 20°C for the
room temperature and between 55 - 60°C for the hot water temperature.
2. Programme your heating and hot water to be off when you are not in the house.
If you are concerned about possible frost damage to any exposed pipe work, it
is advisable to fi t a frost protection system – your installer can advise you about
this.
3. Think about how you use your domestic hot water – if you have a storage
system, it is not necessary to have this switched on all the time, even when you
are in the house.
4. Consider the heat up times required for your central heating. Every home
responds differently when the heating is switched on. Adjust the start time so
that you are not cold when you get up in the morning. A shorter heat up time is
required for other heating periods.
5. In the evening, when the house is up to temperature, it is often possible to
switch off the heating up to an hour before you go to bed, without any noticeable
reduction in comfort.
PLEASE RESPECT YOUR ENVIRONMENT!
Take care to dispose of this product and any packaging or literature in an appropriate way
This product and its associated documentation and packaging are protected by various intellectual
property rights belonging to Honeywell Inc. and its subsidiaries and existing under the laws of the UK
and other countries. These intellectual and property rights may include patent applications, registered
designs, unregistered designs, registered trade marks, unregistered trade marks and copyrights.
Honeywell reserves the right to modify this document, product and functionality without notice. This
document replaces any previously issued instructions and is only applicable to the product(s)
described.
This product has been designed for applications as described within this document. For use outside of
the scope as described herein, refer to Honeywell for guidance. Honeywell cannot be held responsible
for misapplication of the product(s) described within this document.
Manufactured for and on behalf of the Environment and Combustion Controls Division of Honeywell
Technologies Sarl, Ecublens, Route du Bois 37, Switzerland by its Authorised Representative Honeywell Inc.
This document is to be left with the user
and forms part of a Home Information Pack
WHAT IS A PROGRAMMER?
...an Explanation for Householders
(as recommended by the Energy Savings Trust)
Programmers allow you to set ‘On’ and ‘Off’ time periods. Some models switch the central heating
and domestic hot water on and off at the same time, while others allow the domestic hot water
and heating to come on and go off at different times. Set the ‘On’ and ‘Off’ time periods to suit
your own lifestyle. On some programmers you must also set whether you want the heating and hot
water to run continuously, run under the chosen ‘On’ and ‘Off’ heating periods, or be permanently
off. The time on the programmer must be correct. Some types have to be adjusted in spring and
autumn at the changes between Greenwich Mean Time and British
Summer Time. You may be able to temporarily adjust the heating
programme, for example, ‘Override’, ‘Advance’, or ‘Boost’. These
are explained in the manufacturer’s instructions. The heating will
not work if the room ther mostat has switched the heating off. And,
if you have a hot-water cylinder, the water heating will not work if
the cylinder thermostat detects that the hot water has reached the
correct temperature.
EXTRA HOUR
OVERRIDE
NEXT
DAY
COPY
DAY
HOLIDAY
OK
NEXT
DAY/TIME
PROGRAMME
RUN
ST9100 C
Contents
WHAT IS A TIMER?
General Description ........................................................................................3
The way to use a Timer ...................................................................................3
GETTING STARTED WITH YOUR ST9100C
Step 1: Setting the Date & Time .....................................................................4
Step 2: Running a Built-in Programme ...........................................................5
PROGRAMMING YOUR ST9100C
The Built-in Programmes ................................................................................6
Your Personal Programme ..............................................................................6
Reviewing the Programme Times ...................................................................7
Modifying the Programme ..............................................................................7
Copying one day’s Programme to another day .....................................8
Programming a Different Day.................................................................9
Exiting Programming Mode ...................................................................9
Disabling/Enabling Time Periods ...................................................................9
OPERATING YOUR ST9100C
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 ST9100C
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 ST9100C 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 ST9100C? ................ 14
What happens if there is a power failure? ....................................................14
Troubleshooting Guide .................................................................................15
CONFIGURATION & SERVICE DATA
Configuration Data (to be completed by Installer) .......................................18
Boiler & System Service Log ........................................................................19
ST9100C Controls Layout
Time Display
LoT™ Technology Display
Programme Time Markers
Day of Week Indicator
Operating Mode Indicator
Extra Hour Button
Indicator Lamp
Override Button
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Slider
Operating Mode Button
OK/Next Button
Clock – and + Buttons
Holiday Button
Copy Day Button
Next Day Button
15
14
13
1 2 43 5
7
8
6
12
11910
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
3
WHAT IS A TIMER?
General Description
Your Honeywell ST9100C provides timing control for your central heating system,
letting you set ON and OFF periods to suit your own lifestyle.
The ST9100C does not directly control the temperature but works together with other
temperature controls, such as room thermostats, to control your heating system in
your home.
With 7-day programming and up to 3 on/off periods per day, every day can be set
differently.
The following instructions explain how to programme and use the ST9100C to
provide the most home comfort at the least cost.
The way to use a Timer
Think about the time periods when you are typically in the house and when you are
not. These are the times you should use as the basis for the programmes. It will be
necessary to allow some heat-up time for the heating system after periods when it
has been off – this would typically be 1 - 1½ hours, depending on your house and
your preferences.
Other features are commonly available on the Timer to enhance comfort and
convenience, for example, OVERRIDE, EXTRA HOUR, and MODE buttons.
A typical use of the OVERRIDE feature is when you return home unexpectedly for
the rest of the day and the heating is off. Just press the OVERRIDE button and the
heating will come on until the next programme time, at which point it will follow the
normal programme. The advantage here is that you do not have to remember to
switch off because the normal time programme does this for you.
A typical use of the EXTRA HOUR button would be if you returned to the house for
a short period when the heating was off. Pressing the EXTRA HOUR button gives
you 1, 2, or 3 hours of heating, exactly when you need it. Another typical use is when
the heating is already on and you want it to stay on a little longer - just press EXTRA
HOUR and, for that day only, an hour will be added to the end of the time at which
heating normally goes off.
The MODE button allows you to select how you want to operate your heating. The
most obvious use is to switch heating OFF during the summer months, but you may
also use this feature if you take a mid-week day off work, you can then set the MODE
to ONCE to keep the system ON during the day from the first programmed ON time
till the last programmed OFF time.
4
Your ST9100C should have been set up to work correctly when it was installed.
However, the following will show you how you can modify your settings to meet
your particular lifestyle.
To assist you with programming and everyday use your ST9100C will display text
messages at every stage to help you get the most out of your central heating system.
The ST9100C uses LoT™ Technology to constantly update the display to give you
feedback about what is required.
Step 1: Setting the Date & Time
Your ST9100C had the date and time set at the factory, and these are normally
maintained by a backup battery in the event of power failures. If you wish to change
the date or time, or if the LoT™ Display shows the message ‘SET DATE + TIME’ just
follow the instructions below. Otherwise, go to Step 2.
a. Move the slider to the DAY/TIME position. The message ‘SET DATE + TIME’ will
show briefly on the screen, followed by ‘SET THE DAY’, and the day of the month
will now be flashing to indicate it can be changed.
b. To change the day of the month, press the or buttons until the correct
day is shown. Each press of the button will change the date by one day. As soon
as a change has been made, the message ‘IS DAY OK?’ will be displayed. Once
the correct day is reached, press the green button to confirm, and move to
the next step. If you do not need to make a change, just press the button
immediately and this will move you to the next step.
c. The month digits will now be flashing and ‘SET THE MONTH’ will be displayed. To
change the month, press the or buttons until the correct month is shown.
The message ‘IS MONTH OK?’ will be displayed. Press the green button to
confirm the month is correct, and move to the next step.
GETTING STARTED WITH YOUR ST9100C
DAY/TIME
PROGRAMME
RUN
5
GETTING STARTED WITH YOUR ST9100C
d. The year digits will now be flashing and ‘SET THE YEAR’ will be displayed. To
change the year, press the or buttons until the correct year is shown. The
message ‘IS YEAR OK?’ will be displayed. Press the green button to confirm
the year is correct. If you have made a change, and the date is a valid date, the
message ‘DATE SAVED’ will show, and you can move to the next step. If the date
you set was not valid, for example 31 September, the message ‘INVALID’ will
show and you will be returned to the start of the date setting operation.
e. The time will now be flashing and the message ‘SET THE TIME’ will be displayed.
To change the time, press the or buttons until the correct time is shown.
Each press of the button will change the time by one minute. Holding the button
down for more than a few seconds will change the time slowly at first, then
quickly. The message ‘IS TIME OK?’ will be displayed. Press the green button
to confirm the time is correct. If you have made a change, the message ‘TIME
SAVED’ will show, followed quickly by ‘DATE + TIME COMPLETE’.
f. Move the slider to the RUN position, to complete setting the date and time.
Note: if the slider is moved at any time before the date and time have been set
correctly, the message ‘DATE UNCHANGED’ will be displayed briefly, and your
changes will not be saved.
Step 2: Running a Built-in Programme
With the date and time correct, your ST9100C Timer will now be operating to the
built-in programmes. These have been designed to provide heating at typical times
throughout the day, but if you want to customise the settings, please see the next
section ‘PROGRAMMING YOUR ST9100C’ (page 6).
6
PROGRAMMING YOUR ST9100C
The Built-in Programmes
The built-in programmes give you a starting point that you can personalise to your own
requirements. Your Installer should have selected one and ticked the box alongside it. If there
is no tick, the product normally leaves the factory with Profile A installed, but it is a simple
matter to select one of the other profiles (see Changing the Installer Parameters, page 12).
Built-in Programme (Profile A)
ON 1 OFF 1 ON 2 OFF 2 ON 3 OFF 3
Monday to Friday
6:30am 8:30am 12:00pm 1:00pm 4:30pm 10:30pm
Saturday & Sunday
6:30am 9:30am 12:00pm 1:00pm 4:30pm 11:00pm
ON 1 OFF 1 ON 2 OFF 2 ON 3 OFF 3
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Your Personal Programme
The table below has been left blank for you to record your own personal programme.
Built-in Programme (Profile b)
ON 1 OFF 1 ON 2 OFF 2 ON 3 OFF 3
Monday to Friday
6:30am 9:30am 12:00pm 1:00pm 4:30pm 11:00pm
Saturday & Sunday
6:30am 9:30am 12:00pm 1:00pm 4:30pm 11:00pm
Built-in Programme (Profile C)
ON 1 OFF 1 ON 2 OFF 2 ON 3 OFF 3
Monday to Friday
6:30am 7:30am 12:00pm 12:00pm 5:00pm 10:00pm
Saturday & Sunday
8:30am 9:30am 12:00pm 1:00pm 5:30pm 10:30pm
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