Honeywell thermostat ST9400A 1 Day 2 Channel Programmer User Manual

ST9400A – User Guide
1 Day Programmer, 2 channel
Honeywell Control Systems Ltd.Arlington	Business	Park,BracknellBerkshireRG12	1EB
Technical	Help	Desk:	08457	678999www.honeywelluk.com50022737-004	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...

HOT WATERHEATING
EXTRA HOUR
OVERRIDE
EXTRA HOUR
OVERRIDE
OK
NEXT
DAY/TIMEHOT WATERHEATINGRUNST9400A
Contents
WHAT IS A PROGRAMMER?	 General	Description	........................................................................\
................3	 The	way	to	use	a	Programmer	 ........................................................................\
3
GETTING STARTED WITH YOUR ST9400A	 Step	1:	Setting	the	Date	&	Time	 .....................................................................4	 Step	2:	Running	a...


WHAT IS A PROGRAMMER?
General Description
Your  Honeywell  ST9400A  provides  timing  control  for  both  your  central  heating  and hot water systems, letting you set ON and OFF periods to suit your own lifestyle. 
The ST9400A does not directly control the temperature but works together with other temperature controls, such as room thermostats and cylinder thermostats, to control your heating and hot water system in your home.
ST9400A has 1-day programming and 2 on/off periods per day. It is...



Your ST900A 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  ST9400A  will  display  text messages at every stage to help you get the most out of your central heating and hot water system. The ST9400A uses LoT™ Technology to constantly update the display to give you feedback about what is required.
Step 1:...



GETTING STARTED WITH YOUR ST900A
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...



PROGRAMMING YOUR ST900A
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 1OFF 1ON 2OFF...



PROGRAMMING YOUR ST900A
Reviewing the Programme Times
To review your hot water programme, move the slider to the HOT WATER position. 
To review your heating programme, move the slider to the HEATING 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...



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  ST9400A  simply  moves both times together as long as you continue...

9

PROGRAMMING YOUR ST900A
Modifying the Heating Programme
The  heating  programme  has  two  pairs  of ON/OFF  switching  times  per  day.  Each time  can  be  set  between  3.00  am  and  2.50  am  (on  the  next  day)  to  allow  you  to programme the heating to stay on past midnight, if required. 
a. Move the slide switch to the HEATING position. ‘SET HEATING’ will show briefly to verify this action.
b. Now follow the same procedure to set the times as described in ‘Modifying the Hot Water...

10

OPERATING YOUR ST900A
Choosing the Operating Mode (for Heating and/or Hot Water)
The operating mode may only be changed when the slider is set to the RUN position.
A  green INDICATOR  LAMP  shows  when  the  heating  or  hot water is switched ON.
Two MODE buttons are provided to select the Operating Mode and therefore how the heating and hot water are controlled.
Heating has four possible Operating Modes; these are OFF, AUTO, ONCE, CONT.  Pressing the heating MODE button scrolls round these...