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 thermostat 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 thermostat 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.

Honeywell ST9100C Specifications

General

Model	ST9100C
Category	Programmer
Display	LCD
Programs	7-day programming
Backup	Battery backup
Mounting	Wall-mounted
Power Supply	230V AC
Switching Current	3A

Summary

Features

User Interface and Display

Highlights the slider, buttons, LoTTM, and large backlit LCD for user control and readability.

Programming Options

Covers 7-day programming, automatic time change, and built-in memory for flexible and reliable operation.

Energy Efficiency and the Environment

Environmental Impact of Home Heating

Discusses the contribution of domestic heating to UK carbon emissions.

Maximising Comfort and Efficiency

Provides tips on using controls like timers and thermostats to save energy while maintaining comfort.

ST9100C Controls Layout

Component Identification

Identifies and explains the function of each button, slider, and indicator on the ST9100C unit.

Boiler & System Service Log

Service Record Keeping

Provides space for recording boiler and system service details and contact information.

Understanding Your Timer

Timer's Role in Home Heating

Explains the ST9100C's function in controlling central heating and hot water systems.

Effective Timer Usage Strategies

Guides on setting ON/OFF times based on lifestyle and considering heat-up periods.

Key Operating Features

Details OVERRIDE, EXTRA HOUR, and MODE buttons for enhanced user control.

GETTING STARTED WITH YOUR ST9100C

Setting the Date and Time

Step-by-step instructions for setting the correct date and time on the ST9100C.

Running Built-in Programmes

Guides on operating the timer using pre-set programmes after initial setup.

PROGRAMMING YOUR ST9100C

Utilising Built-in Programmes

Introduces pre-set programmes as a starting point for user customisation.

Creating Your Personal Programme

Provides a template for users to record their custom heating and hot water schedules.

Reviewing and Adjusting Programme Times

Describes checking and modifying existing programmed ON/OFF times.

Modifying Programme Settings

Details the process of changing individual ON and OFF times for each period.

Copying Programmes Between Days

Explains how to copy one day's programme to another for efficient setup.

Setting Individual Day Programmes

Guides on setting programmes for days that differ from copied schedules.

Exiting Programming Mode Safely

Instructs on saving changes and returning to normal operation.

Disabling/Enabling Time Periods

Explains how to disable specific ON/OFF time periods by matching start and end times.

OPERATING YOUR ST9100C

Selecting an Operating Mode

Details the four operating modes: OFF, AUTO, ONCE, and CONT.

Temporary Operation Overrides

Explains how to temporarily switch heating ON or OFF without altering set programmes.

Using the Extra Hour Function

Describes how to add extra hours of heating beyond programmed times.

Activating the Holiday Function

Allows users to switch off the system for a specified duration when away from home.

FINE TUNING YOUR ST9100C

Clock Display Format Adjustment

Guides on switching between 12-hour AM/PM and 24-hour clock formats.

Installer Parameter Configuration

Lists and explains configurable parameters adjustable by the installer or user.

Entering and Navigating Installer Mode

Details the procedure for accessing and navigating the installer configuration menu.

Exiting Installer Mode

Explains how to exit the installer mode and return to normal operation.

FAQ AND TROUBLESHOOTING

Correcting Time Settings

Provides steps to correct the time if it was set incorrectly.

Automatic Clock Changes Explained

Explains the automatic time change feature for daylight saving.

Resolving Programming Errors

Offers advice on recovering from programming errors or getting 'lost' in menus.

Power Failure Behaviour

Describes behaviour during power failures and how settings are retained.

Troubleshooting Common Issues

A guide listing common symptoms, causes, and remedies for ST9100C problems.