Honeywell ST9100A User Manual

ST9100A – User Guide
1 Day Timer, 1 channel
Honeywell Control Systems Ltd.
Arlington Business Park,
Bracknell
Berkshire
RG12 1EB
Technical Help Desk: 08457 678999
www.honeywelluk.com
50022737-001 B
© 2007 Honeywell International Inc.
Features
Easy to use slider and buttons combined with ‘LoT’™ Technology and an
‘OK’ button, allows you to confirm 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.
1-day Programme lets you choose settings built into ST9100A 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 ST9100A
every time.
Built-in Memory holds your programme indefinitely - even if the mains power fails.
Energy Efficiency 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 figure, so it is important to understand how your
controls can help to maximize energy efficiency 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 fit 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 ST9100A Specifications

General

Voltage	230V
Temperature Range	0 to 40 °C
Display Type	LCD
Time Accuracy	± 1 minute per month
Mounting	Surface Mount
Voltage Rating	230V AC
Number of Channels	1
Battery Backup	Yes
IP Rating	IP20
Type	Programmable Timer
Maximum Load	16A

Summary

Features

User Interface & Display

Highlights intuitive controls, LoTTM Technology feedback, and extra-large backlit LCD.

Programmable Functions

Covers 1-day programming, automatic time changes, and power-fail memory retention.

Energy Efficiency and the Environment

Optimizing Heating & Hot Water Use

Discusses setting thermostats, programming schedules, and managing hot water for savings.

Energy Saving Tips

Provides practical advice on adjusting heating times and evening usage for efficiency.

ST9100A Controls Layout

Controls Identification

Labels and identifies all physical buttons, sliders, and indicators on the device.

Boiler & System Service Log

Service Record Keeping

Dedicated section for logging maintenance, installer details, and contact information.

Understanding Your Timer

General Timer Description

Explains the ST9100A's function in controlling central heating and hot water systems.

Effective Timer Usage

Provides guidance on setting time periods and using features like Override and Extra Hour.

Getting Started with ST9100A

Step 1: Setting the Date & Time

Detailed instructions for configuring the device's internal clock and calendar.

Getting Started with ST9100A

Step 2: Running a Built-in Programme

Explains how to activate and use the pre-configured heating programmes.

Programming Your ST9100A

Built-in Programme Profiles

Lists and describes the default heating schedules (Profiles A, b, C) available.

Personal Programme Setup

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

Programming Your ST9100A

Reviewing Programmed Times

Guides users on how to check the currently set ON/OFF times for heating periods.

Modifying Programmed Times

Instructions on how to adjust specific ON and OFF times for heating periods.

Programming Your ST9100A

Modifying ON/OFF Times

Details the process for setting/adjusting the second set of ON/OFF times.

Programming Your ST9100A

Exiting Programming Mode

Instructions on how to safely exit the programming interface and save changes.

Disabling/Enabling Time Periods

Explains how to deactivate or reactivate specific programmed heating periods.

Operating Your ST9100A

Selecting Operating Modes

Details how to choose between OFF, AUTO, ONCE, and CONT modes for system control.

Operating Your ST9100A

Temporary Operation Override

Explains how to temporarily switch the system ON or OFF without altering programmed schedules.

Extra Hour Functionality

Describes how to use the EXTRA HOUR button to extend heating periods.

Fine Tuning Your ST9100A

Clock Format Adjustment

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

Installer Parameter Configuration

Details the options available for installer-set parameters to customize device behavior.

Fine Tuning Your ST9100A

Entering Installer Mode

Step-by-step instructions on how to access the installer configuration menu.

Exiting Installer Mode

Procedures for safely leaving the installer configuration mode.

FAQ and Troubleshooting

Setting the Time Correctly

Instructions for adjusting the timer's time setting when it is inaccurate.

Automatic Time Change

Explains the DST adjustment feature and how to manage it.

Navigating Programming Issues

Advice for users who become confused during the programming process.

Power Failure Behavior

Details how the timer functions during power outages and how settings are preserved.

FAQ and Troubleshooting

Troubleshooting Common Symptoms

Lists common issues like blank displays or heating problems with suggested remedies.

Configuration & Service Data

Installer Configuration Data

A table for installers to record specific settings applied to the ST9100A.