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

							11
PROGRAMMING YOUR  ST9120C
Exiting Programming Mode:
To exit programming mode, move the slider to the RUN position. This can be done at 
any time during the programming process, and any changes made and confirmed 
with the 
 button will have been saved.
Note: If the unit is left in Programming mode for more than 10 minutes without the 
slider being moved or any buttons pressed, the message ‘MOVE SLIDER’ will be 
displayed.  Press a button to continue programming, or move the slider to the  RUN 
position.
Disabling / Enabling Time Periods
To disable any of the time periods ON 1 to OFF 1,  ON 2 to OFF 2, or ON 3 to OFF 3, 
simply set the ON time and its paired OFF time to the same time, and the programme 
will just ignore them. 
To re-enable the time period, simply set the two ON and OFF times to be different. 
						

							12
OPERATING YOUR  ST9120C
Choosing the Operating Mode
The operating mode may only be changed when the slider is set to the RUN position.
The  symbol is displayed during a programmed heating on period. A green 
INDICATOR LAMP shows when the heating is switched ON.
A  MODE button is provided to select the Operating Mode and therefore how the 
heating is controlled.
There are four possible Operating Modes; these are OFF,  AUTO, ONCE,  CONT.  
Pressing the MODE button scrolls round these modes in sequence, and the display 
indicates which mode is currently active.
•	 OFF mode
  The system will remain OFF.
•	 AUTO (Automatic) mode
  The system will be switched ON and OFF according to the programme.
•	 ONCE mode
  The system will come ON at the first programmed ON time, and go OFF at the 
last programmed OFF time.
•	 CONT (Continuous) mode
  The system will remain ON continuously.
Overriding the Operation Without Changing the Programmes
In AUTO  and ONCE operating modes, the OVERRIDE button switches the heating 
ON or OFF without altering the programme. 
When the 
 symbol is displayed, pressing the OVERRIDE button switches the 
heating OFF until the next programmed ON time.
If the 
 symbol is not displayed, pressing the OVERRIDE button switches the 
heating ON until the next programmed OFF time.
The LoT™ Display will provide you with information about the override. 
						

							13
OPERATING YOUR  ST9120C
The Extra Hour Function
The EXTRA HOUR button allows you to switch the system ON for up to 3 extra hours 
without altering the programme. Pressing the button once will give one extra hour.  
The  LoT™ Display will display the message ‘+ 1 HOUR’, to confirm the button has 
been pressed. 
When the heating is OFF (the  symbol is not displayed), pressing the EXTRA 
HOUR button switches the heating ON for just one hour.
When the heating is
  ON (the  symbol is displayed), pressing the  EXTRA HOUR 
button extends the programmed ON period by one hour.
Further presses of the EXTRA HOUR button will increase the extra hour period by 
one hour for each button press, up to a maximum of 3 hours.  The LoT™ Display will 
continue to provide information on the extra hour status.
To cancel the extra hours, just keep pressing the EXTRA HOUR button until the 
‘CANCELLED’ message appears on the LoT™ Display.
The Holiday Function
The Holiday function allows you to switch off your system for a specified number of 
days (from 1-99 days).  This lets you save energy and related costs when you are 
away from home, but resumes normal operation on the day of your return.
During this period heating will operate at the OFF (frost protection) set temperature.
To set the Holiday function:
a.  Ensure the slider is in the  RUN position, then press the HOLIDAY button once. 
The message ‘SET HOLIDAY’ will appear briefly, followed by ‘SET DAYS AWAY’.
b. 
Use the   or  buttons to set the number of days you will be away. The display 
will show the number of days, and this number will be flashing to indi\
cate it can be 
changed. The day of the week will also keep changing to show the day you\
 return.
c. If you have made a change to the number of days, the message ‘DAYS AWAY OK ?’ 
will appear. Press the green  button to confirm your selection.
d. 
The message ‘SAVED’ will be displayed for a few seconds, followed by the date you 
return, to enable you to check you have programmed the holiday function correctly.
e.  During the holiday period, the LoT™ Display will show the message ‘ON 
HOLIDAY’ and the display will count down the number of days till you return.
To cancel the Holiday function:
f.   To cancel the Holiday function, just press the HOLIDAY button again. The LoT™ 
Display will show ‘CANCELLED’ and the unit will return to normal operation.
Note: while setting the Holiday function, if there is a gap of more than 1 minute 
between button presses, the function will cancel itself automatically and return to 
normal operation. 
						

							14
OPERATING YOUR  ST9120C
Enquiry Mode
As the heart of your system, the ST9120C has access to temperature information 
from the other system components, and allows you to enquire about this information.
To enter Enquiry Mode, ensure the slider is in the RUN position, then press and 
hold the 
 button for 4 seconds.
The  LoT™ Display will show the message ‘INFO MENU’ to confirm that you have 
entered Enquiry Mode.
Pressing the 
  or  buttons then allows you to step around and view the available 
information. The LoT™ Display will continue to update to tell you what inf\
ormation 
is being viewed, and the main display will show the value. If the information is not 
available, the display will show dashes -- -- instead of a temperature value. The table 
below shows the type and sequence of information available in Enquiry Mode.
To exit Enquiry Mode:
If the  button is not pressed for 30 seconds, your ST9120C will return to RUN  mode.
InformationLoT™ MessageOther display symbols
* Room temperature ROOM TEMP
* Room temperature settingROOM SET
Ŧ Hot water temperatureWATER TEMP
Ŧ Hot water temperature settingWATER SET
* This information will be available if you have a room temperature control system, with a DT92E 
room thermostat.
Ŧ 
This information will be available if you have a hot water control system, with a CS92A hot water sensor
/
/
// 
						

							15
FINE TUNING YOUR  ST9120C
Changing from AM/PM Time Display to the 24 Hour Clock
Your ST9120C can operate on the 12 hour AM/PM or 24 hour clock formats. To 
change the format, ensure the slider is in the RUN position then press and hold the 
  and  buttons together for about 2 seconds. Ignore the ‘NOT VALID’ message 
that will appear briefly. Then the displayed times will be changed automatically to 
the new format.
Repeating this procedure will change the clock display back to the original format.
Changing the Installer Parameters
The ST9120C has a special Installer Mode where some features can be adjusted 
to suit your lifestyle or preferences – these are called Installer Parameters, and are 
listed in the table below, along with a description of the options that are possible.
Your installer should set this up for you to suit your application (see \
CONFIGURATION 
& SERVICE DATA section). However, you may wish to alter some of the settings 
yourself, and this section shows you how to do this.
Note: some parameters indicated by * may only be viewed if the previous parameter 
is set to a particular value.
# Set hot water temperature is only used when the system contains a CS92A wireless 
hot water sensor, and is not used in this system.
INSTALLER 
PARAMETER Parameter 
Number Default 
Value Options
Description
24hr or am/pm 
clock display. 1
1212, 24 12 = am/pm display
24 = 24hr display
Configure backlight 
operation.2 20, 1, 2 0 = off 
1 = on if button pressed
2 = on continuously
Enable/disable auto 
time change. 3
10, 10 = disabled
1 = enabled
1-day or 5/2-day or 
7-day operation.4 71, 5, 7 1 = 1-day operation
5 = 5/2-day operation
7 = 7-day operation
Number of ON/OFFs 
per day.5 32, 32 = 2 on/offs per day
3 = 3 on/offs per day
Select default time 
programme. 6
AA, b, C A = standard
b = at home
C = economy
# Set hot water 
temperature8 60°C 40 to 
85°CStored hot water set 
temperature 
						

							16
To Enter Installer Mode:
a. Ensure the slider is in the RUN  position, then press and hold 
 and  buttons 
together for 8 seconds. Ignore the ‘NOT VALID’ message that is displayed for a 
few seconds. The message ‘SET UP MENU’ will show briefly, followed by ‘SET 
INSTALLER OK ?’
b.  Press the 
 button to take you into the Installer Mode Parameter Menu.
c.  Parameter 1 is now available to change. This is to allow you to change t\
he 
clock format from 12 hour AM/PM to 24 hour. At every step, the LoT™ Display 
will inform you what the parameter means and what option you have selected. 
The parameter number is shown on the display separated by a colon from the 
parameter value.
d.  You can change the parameter value by pressing the 
  or  buttons. At this 
point the description in the LoT™ Display will change and the parameter value 
will flash. If you press 
 the value will stop flashing and be saved for use.
INSTALLER 
PARAMETER Parameter 
Number Default 
Value Options
Description
Optimum start9 00, 1, 2 0 = no optimum start1 = delayed start
2 = optimum start on
* Optimum start limit 1011, 2, 3 1 = 1 hour
2 = 2 hours
3 = 3 hours
Optimum stop11 00, 10 = disabled
1 = enabled
Frost protection 
temperature 12
55 to 
16°C Frost protection 
temperature
Minimum ON/OFF 
time 13
11, 2, 
3, 4, 5  mins Minimum ON/OFF time 
in minutes
Cycle rate14
63, 6, 9, 
12 Number of boiler cycles 
per hour 
Proportional band 
width 15
1.51.5 to 
3.0°C  Width of control 
proportional band in °C 
Failsafe mode (loss of 
RF communications)16
00, 10 = off
1 = heating on  20%
Reset all parameters20 10, 10 = do not reset
1 = default parameters
FINE TUNING YOUR  ST9120C 
						

							17
FINE TUNING YOUR  ST9120C
e. Press  to move to the next parameter available for editing.
f.   Keep pressing 
 to step around the list of parameters, and use   or  
buttons to change the parameter value.
g.  Any parameter changes that have been confirmed with the 
 button will be 
saved and used.
To Exit Installer Mode:
h.  You can exit Installer Mode at any time by moving the slider to the next \
position 
and then back again to RUN .
  Note: Installer Mode will exit automatically after 10 minutes if the slider is not 
moved.
Optimisation
The Optimisation features are explained on page 5. Parameters 9, 10, and 11 are 
used to enable or disable and set these features to suit your requirements. You can 
set Optimum Start, Delayed Start, or Optimum Stop, and you can also set a limit to 
the Optimum Start time of 1, 2, or 3 hours.
Note: the radiator symbol 
 will flash to indicate Optimisation is taking place.
The diagrams below illustrate how Optimisation works.
0500 0600 0700 Time
Comfort
temperature Optimum Start
Optimum StartProgrammed Time
Temperature
ON
OFF
0500 0600 0700 Time
Comfort
temperature Programmed Time
Delayed StartDelayed Start
Temperature
ON
OFF
2100 2200 2300 Time
Optimum Stop
Optimum StopProgrammed Time
Temperature
ON
OFF 
						

							18
BOILER SERVICE REMINDER
If your house is rented, by Law, your gas boiler should be inspected once a year to 
ensure it is operating safely. Your ST9120C Timer has a range of features designed 
to help make sure this service is carried out at the correct time. These features will be 
programmed by your Installer, Maintenance Engineer, or Landlord.
•	 If	it	has	 been	 set	to	do	 so,	 ST9120C	 will	display	 a	message	 on	the	 screen	 to	
remind you that a boiler service is due.
•	 If	 the	service	 is	overdue,	 the	Timer	 may	switch	 off	the	 heating	 system,	 to	ensure	
your safety. If this happens you must arrange an immediate service visit. Contact 
details should be listed on page 31 of this guide, in the section Boiler\
 & System 
Service Log.
•	 A	 contact	 telephone	 number	may	also	have	 been	 programmed	 into	the	ST9120C.	
If so, a message will appear on the LoT™ Display indicating the number you 
should call.
Countdown to Service
Your ST9120C can indicate a countdown for the 
number of days until your service is due. This 
message will appear on the screen every few 
seconds, to give you an opportunity to schedule 
a service visit.
When Service is Due
When your boiler service is OVERDUE the words 
“SERVICE DUE” will continue to flash on your 
screen, and you should arrange an immediate 
service visit. 
						

							19
Shut-down
If your ST9120C shows the words “SERVICE 
DUE” and “OFF” then your boiler service is 
overdue and the boiler has been automatically 
switched off to ensure your safety – you should 
arrange an immediate service visit.
If set to do so, it may be possible to obtain limited 
use of the boiler by pressing the EXTRA HOUR 
button. Each button press will allow operation of 
the boiler for 1 hour at a time, and the screen will 
display the message “On 1h” as shown. However, 
you should still arrange an immediate service visit, 
as this will allow you to comply with the law and 
ensure your gas boiler is operating safely.
BOILER SERVICE REMINDER
OPERATING YOUR  DT92E
Inquiring about the Set Temperature
DT92E normally displays the 
measured room temperature.
To inquire about the set 
temperature, simply press 
one of the 
 or  buttons. 
The set temperature will be 
shown on the display along 
with the arrow symbols, 
and the temperature will be 
flashing.
Adjusting the Set Temperature
The set temperature is 
adjusted by pressing the  
or  buttons. Each time one 
of the buttons is pressed, the 
set temperature will change 
by 0.5°C.
=°C
=°C 
						

							20
OPERATING YOUR  DT92E
Switching Off
Pressing the off/standby button  for 2 seconds will switch the 
DT92E into off/standby mode. 
The 
 symbol will show in the 
display, and the unit will control 
at the frost protect setpoint, as 
set at the ST9120C.
To switch back on, simply press 
the 
 button for 2 seconds again. 
 
Display Updates
To conserve battery power, DT92E only communi-
cates with ST9120C at regular intervals or when you 
press a button. This means there can be up to a 
few minutes delay between an action initiated on 
ST9120C and the DT92E display being updated.
If you press a button on DT92E it may take a few 
seconds for ST9120C to respond. DT92E will 
indicate it is waiting for information by displaying the 
hourglass symbol and dashes as shown.
Heating Indicator
The flame symbol indicates that the 
boiler is on for heating. The flame will 
disappear when there is no heating 
demand.
Frost Protection
The frost symbol will be displayed if the room 
temperature goes below the frost setting. The flame 
will also be displayed to indicate when the boiler has 
been switched on.
2 s
2 s