Honeywell Sundial RF Pack 1 Wireless Enabled Timer and Thermostat User Manual

User Guide
Y9120H Sundial RF2 Pack 1
How to use:
  ST9120C Wireless Enabled Timer
  DT92E Wireless Room Thermostat
  BDR91T Wireless Enabled Relay Box (if installed)
Honeywell Control Systems Ltd.
Arlington Business Park,
Bracknell
Berkshire
RG12 1EB
Technical Help Desk: 08457 678999
www.honeywelluk.com 50047645-005 A
© 2011 Honeywell International Inc.
System Components
Energy Efficiency and the Environment
Home energy use is responsible for more than ¼ of the total UK carbon emissions 
which contribute...

EXTRA HOUR
OVERRIDE
NEXT
D AY
COPY
D AY
HOLIDAY
OK
NEXT
Time Display
LoT™ Technology Display
Programme Time Markers
Day of Week Indicator
RF Symbol
‘ON’ period indicator
Extra Hour Button
Indicator Lamp
Override Button
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Boiler Status Indicator
Slider
Operating Mode Indicator
Operating Mode Button
OK/Next Button
Clock – and + Buttons
Holiday Button
Copy Day Button
Next Day Button ECO Mode Active
Frost Protect Indicator
ECO Countdown Indicator
Heating Demand...

3
Contents
CONTROL OF YOUR SYSTEM
 General Description of Controls in Your System ............................................... 4
  The way to use a Timer  ........................................................................\
............. 4
  The way to use a Room Thermostat  ................................................................. 5
  Control of Your Boiler  ........................................................................\
................ 5
 Optimisation...

4
General Description of Controls in Your System
Your Honeywell ST9120C provides timing control for your central heating system, 
letting you set ON and OFF periods to suit your own lifestyle. 
The ST9120C 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.
ST9120C also has a Boiler Service reminder...

5
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 typic\
al 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...

6
Optimum Start works by measuring how quickly your system normally heats up, and 
using this to calculate the correct time to switch on to reach your comfort temperature, 
when you want it. So the times you set are when you want the heating to be at 
the correct temperature, and the system adjusts the starting time to meet this.
Delayed Start is an alternative to Optimum Start. It works by using your normal 
programmed start times, compares the actual temperature with the set temperature, and 
delays...

7
GETTING STARTED WITH YOUR ST9120C
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...

8
PROGRAMMING YOUR  ST9120C
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 15).
 Built-in Programme (Profile A)ON 1OFF 1 ON 2OFF 2 ON 3OFF 3
Monday to Friday...

9
PROGRAMMING YOUR  ST9120C
Reviewing the Programme Times
To review your programme, move the slider to the PROGRAMME position. 
To review the programme times, press the 
 button repeatedly. The appropriate 
ON and OFF markers will be displayed to show you which time is being reviewed. 
Any of these times can be adjusted by using the 
  or  buttons, and then 
confirmed using the  button. Remember to return the slider to the RUN  position 
after reviewing is complete.
Modifying the Programme
The programme...

10
Note: When pressing the  button the next ON or OFF marker may start to flash. 
This indicates you have tried to set a time equal to one of the next programme times 
already in the memory.  Similarly, when pressing the 
 button the previous ON or 
OFF marker may start to flash. This indicates you have tried to set a time equal to 
one of the previous programme times. If this happens the ST9120C simply moves 
both times together as long as you continue to press the 
  or  buttons.  Follow 
the procedure...