User Guide - Honeywell
Contents
1. 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 Environmental and Combustion Controls Division of Honeywell Technologies Sarl ACS ECC EMEA Z A La Pi ce 16 1180 Rolle Switzerland by its Authorised Representative Honeywell Inc 31 Contents CONTROL OF YOUR SYSTEM General Description of Controls in Your System The way to use a TimMer The way to use a Room Thermostat Control of Your Boiler 0 OPtHIMISAUOM jcvseseasesstcectaecdassnanvaeseisastvnee aaa EER RE e stiediaceeaigens GETTING STARTED WITH YOUR ST9120C Step 1 Setting the Date TIME avsccscccstose2. Ilia SF riz A Pid E R P E R on ON2 ON ON ON2 ON OFF1 OFF2 OFF3 OFF1 OFF2 OFF3 Honeywell C Honeywell a 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 in Reviewing the Programme Times page 9 to check and adjust these times as necessary c SET OFF TIME 1 will be displayed and the first OFF 1 time will now be flashing If you do not wish to change the time press the green OK button and move to the next step Otherwise use the or buttons to change the time Press the green button to confirm the time is correct and move to the next step SAVED will be displayed for a moment to confirm that any change has been saved to memory d The remaining ON and OFF times ON 2 OFF 2 ON 3 OFF 3 can be set by using the or buttons to change the time then the green K button to confirm the time is correct and move to the next step If you do not wish to change the time just press the green Ok button to move directly to the next ON OFF time witho
3. PLEASE RESPECT YOUR ENVIRONMENT Take care to dispose of this product and any packaging or literature in an appropriate way Programmers allow domestic hot water come on and go off heating programme are explained in the detects that the hoi A room thermosta setting and switch a higher setting wi room being control best way to do this hermostat further hermostatic radiat a temperature that Room thermostats 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 WHAT IS A ROOM THERMOSTAT an explanation for Householders as recommended by the Energy Savings Trust he air temperature switching on the heating when the air temperature falls below the thermostat WHAT IS A PROGRAMMER an Explanation for Householders as recommended by the Energy Savings Trust you to set On and Off time periods Some models switch the central heating and on and off at the same time while others allow the domestic hot water and heating to 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 sp
4. 21 The ECO button allows you to change to a lower energy saving set temperature for a period of your choice from 1 to 24 hours This temperature is pre set in the DT92E Installer Mode but you can adjust this to any temperature you want when ECO mode has been activated The default ECO temperature is 18 C At the end of the time period the thermostat will return to its original set temperature Entering ECO Mode and Setting the Energy Saving Time Period Press the green ECO button to enter ECO mode The word ECO will appear on the display and the thermostat will allow you to set the number of hours you want to be at the new set temperature Use the and fy buttons to set the hours up to a maximum of 24 hours Please note ECO mode is not accessible in Holiday mode or if Service shutdown has occurred a o A a gt i C ihr 1 2 3 4 24hr 7 hr a oye 5s ECO X A nn Y JUU What Happens in ECO Mode In ECO mode the display will show a countdown of the remaining time hours and minutes in ECO mode identified by the hourglass symbol The display will alternate every 5 seconds to show the current room temperature When in ECO mode pressing the a or buttons will adjust the set temperature for the remainder of the ECO time period 22 DT92E ENERGY SAVING ECO FEATURE How to Exit ECO Mode To exit ECO mode simply press the green ECO button again ECO will disappea
5. SET DATE TIME just follow the instructions below Otherwise go to Step 2 a Move the slider to the DAY TIME position The message SET DATE TIME will show briefly on the screen followed by SET THE DAY and the day of the month will now be flashing to indicate it can be changed DAY TIME PROGRAMME RUN Honeywell f 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 The month digits will now be flashing and SET THE MONTH will be displayed To change the month press the or buttons until the correct month is shown The message IS MONTH OK will be displayed Press the green button to confirm the month is correct and move to the next step 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 DA
6. Day Button 18 Next Day Button Programme Time Markers Day of Week Indicator PF Symbol 6 ON period indicator Extra Hour Button O Indicator Lamp O Override Button Keep this document in a Home Information Pack DT92E CONTROLS LAYOUT Honeywell t ee ECO Mode Active OFF Standby Indicator 2 Frost Protect Indicator O RF Communications Indicator ECO Countdown Indicator Battery Low Indicator 4 Heating Demand Indicator 11 Fault Indicator O Setpoint Change Buttons Setpoint Indicator ECO Button Temperature Display OFF Standby Button BDR91T CONTROLS LAYOUT Green light relay status indicator Push button Red light indicator for special modes or loss of communications CONFIGURATION amp SERVICE DATA Configurable Features Options Factory Installer configured setting note value DT92E Configuration Measurement offset 3 0 Cto0to30c o J Upper setpointlimit 21to35 c0_ sce Lower setpoint limit 5to210 5c f Energy saving ECO setpoint 5to35 C_ dT 180 Boiler amp System Service Log The space below can be used to provide a record of boiler amp system services and the names and contact numbers of the Installer and Service Personnel This information is important for a Home Information Pack Service Installation Installation Service Date Engineer Telephone Number Contact Details
7. Width of control proportional band in C 0 off 0 1 2 3 4 6 1 heating on 20 0 1 0 1 0 do not reset 1 default parameters 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 the 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 16 e Press Qk 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
8. 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 MIN will flash to indicate Optimisation is taking place The diagrams below illustrate how Optimisation works Optimum Start Optimum Stop Optimum Start Programmed Time Optimum Stop Programmed Time O q 2 i i i z saadi Comfort 1 i f temperature t Temperature fi T L 1 1 fi 0500 0600 0700 Time 2100 2200 2300 Time Delayed Start Programmed Time 7 p Delayed Start ONE weet ono A i a Comfort temperature Temperature 0500 0600 0700 Time 17 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 e 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 e If the service is overdue the Timer may switch off the heating
9. 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 20 Low Baitery Indicator Battery Replacement The battery symbol will start to flash if the battery power is running low From this point there will be a minimum of 4 weeks before the product will cease to function Batteries are accessed by unclipping the front cover at the bottom Note battery polarity Reverse process to refit front cover Use 2xLR6 AA alkaline batteries only Immediately on power up DT92E will try to communicate and synchronise with ST9120C This process may take up to 4 minutes and will be indicated by the word Sync on the DT92E display RF Communications Indicator A brief flash of the RF symbol indicates the DT92E has been communicating with the other system controls Lockout Your DT92E works in conjunction with the ST9120C time control If the timer is set to OFF or CONT it may not be possible to override it from the thermostat and this is indicated by the lockout symbol q To switch the heating on you must go to the timer and set the Mode to AUTO ONCE or CONT
10. mode Information LoT Message Other display symbols Room temperature setting ROOM SET F Hot water temperature WATER TEMP fej F Hot water temperature setting WATER SET if This information will be available if you have a room temperature control system with a DT92E room thermostat F This information will be available if you have a hot water control system with a CS92A hot water sensor ROOM TEMP ROOM SET ED UU l E ja WATER SET el _ VATER TEMP oe aj 2 14 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 amp SERVICE DATA section However you may wish to alter some of the se
11. 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 the start a little depending on how close these temperatures are to each other Optimum Stop saves energy and money by switching off a little earlier than the normal programme time If the house is up to temperature you will not notice the effect on the temperature but you will see a difference in your fuel bill The radiator symbol on ST9120C will flash to let you know whenever Optimisation is operating The other controls in your system should not require adjustment Your ST9120C 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 ST9120C will display text messages at every stage to help you get the most out of your central heating system The ST9120C uses LoT Technology to constantly update the display to give you feedback about what is required Step 1 Setting the Date amp Time Your ST9120C had the date and time set at the factory and these are normally maintained by a backup battery in the event of power failures If you wish to change the date or time or if the LoT Display shows the message
12. G ECO FEATURE Entering ECO Mode and Setting the Energy Saving Time Period 22 What Happens in ECO Mode uu i HOW to Exit ECO IMOGG ieira ronnie eaaet tataiso iaria FINE TUNING YOUR DT92E Changing the DT92E Installer Parameters 0 0 cccceeeeceeeeeseneneeeeeeneeeees 23 OPERATING YOUR BDR91T RELAY BOX IF INSTALLED Automatic Operation Temporary Manual Override cece eee 25 Loss of Wireless COMMUNICATIONS ce eect eteeeeeeteeeeteeeetssesceetseeeeeeeseeaee 25 FAQ AND TROUBLESHOOTING Frequently Asked QueStiOns irinari 26 Troubleshooting Guide CONFIGURATION amp SERVICE DATA to be completed by Installer 30 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 Shut down feature which helps ensure your gas boiler is regularly serviced in compliance with UK Gas Safety Regulations For more details see pages 18 amp 19 Your system includes a DT92E wireless room thermostat and may include a BDR91T Relay Box to switch your boiler remotely
13. NG Troubleshooting Guide cont Symptom Possible Cause ST9120C shows the DT92E batteries message SENSOR LOW are running low on BATT and a flashing power radiator symbol M DT92E shows a flashing battery symbol DT92E display is blank ST9120C shows the DT92E batteries are message NO SIGNAL running low on power Remedy Change the DT92E batteries see page 21 for how to do this Change the DT92E batteries see page 21 for how to do this and a flashing radiator symbol M and DT92E RF communication shows a flashing RF path between symbol ST9120C and DT92E is blocked possibly by a metal object ST9120C shows the RF communication message NO SIGNAL path between and a flashing flame ST9120C and symbol a BDR9Q1T is n blocked possibly Red light on BDR91T if installed is lit by ametal object continuously ST9120C shows the Fault with DT92E message SENSOR FAULT and a flashing radiator symbol i DT92E display shows and a flashing spanner symbol Check direct path between both products and re position any objects that may be blocking the signal Relocate the DT92E if possible Check direct path between both products and re position any objects that may be blocking the signal Call Installer 29 Insert application number as per Installation wiring diagrams Configuration Data to be completed by Installer The tables below ar
14. OGRAMMING 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 R 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 11 Choosing the Operating Mode The operating mode may only be changed when the slider is set to the RUN position The ii 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 SAT SAT 19 06 2010 19 06 2010 WUSU o
15. RA 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 indicate 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 holi
16. TE SAVED will show and you can move to the next step If the date you set was not valid for example 31 September the message INVALID will show and you will be returned to the start of the date setting operation The time will now be flashing and the message SET THE TIME will be displayed To change the time press the or buttons until the correct time is shown Each press of the button will change the time by one minute Holding the button down for more than a few seconds will change the time slowly at first then quickly The message IS TIME OK will be displayed Press the green button to confirm the time is correct If you have made a change the message TIME SAVED will show followed quickly by DATE TIME COMPLETE Move the slider to the RUN position to complete setting the date and time Note if the slider is moved at any time before the date and time have been set correctly the message DATE UNCHANGED will be displayed briefly and your changes will not be saved Step 2 Running a Built in Programme With the date and time correct your ST9120C Timer will now be operating to the built in programmes These have been designed to provide heating at typical times throughout the day but if you want to customise the settings please see the next section PROGRAMMING YOUR ST9120C page 8 The Built in Programmes The built in programmes give you a starting point that you can persona
17. These products use state of the art 2 way RF communications to share information and give you robust and flexible control of your indoor environment The following instructions explain how to programme and use the ST9120C and associated controls to provide the most home comfort at the least cost The way to use a Timer Think about the time periods when you are typically in the house and when you are not These are the times you should use as the basis for the programmes It will be necessary to allow some heat up time for the heating system after periods when it has been off this would typically be 1 1 hours depending on your house and your preferences If Optimum Start has been selected see page 17 you do not have to allow for this heat up time as the timer is intelligent and will calculate the correct starting time for your house This is based on measurements it makes about your system characteristics and on the current and target room temperatures All you have to do is programme the time periods when you want to be comfortable Other features are commonly available on the Timer to enhance comfort and convenience for example OVERRIDE EXTRA HOUR and MODE buttons A typical use of the OVERRIDE feature is when you return home unexpectedly for the rest of the day and the heating is off Just press the OVERRIDE button and the heating will come on until the next programme time at which point it will follow the normal program
18. WUSU O lal uy Hf g4 amp Honeywell Honeywell e OFF mode The system will remain OFF e AUTO Automatic mode The system will be switched ON and OFF according to the programme e ONCE mode The system will come ON at the first programmed ON time and go OFF at the last programmed OFF time e 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 MI symbol is displayed pressing the OVERRIDE button switches the heating OFF until the next programmed ON time If the 11 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 12 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 MH symbol is not displayed pressing the EXTRA HOUR button switches the heating ON for just one hour When the heating is ON the I symbol is displayed pressing the EXTRA HOUR button extends the programmed ON period by one hour Further presses of the EXT
19. ation is lost for a period of 1 hour the red light will illuminate The Relay Box will then enter the failsafe mode as selected by your Installer see page 30 When RF communication is restored the Relay Box will automatically return to normal operation 25 How do set the time only if the ST9120C clock is not correct Your ST9120C contains an accurate digital clock that is factory set Should you ever need to change the time just follow this procedure a Move the slider to the DAY TIME position b Keep pressing the green Ok button until the message SET THE TIME is displayed To change the time press the or buttons until the correct time is shown The message IS TIME OK will be displayed Press the green button to confirm the time is correct If you have made a change the message TIME SAVED will show followed quickly by DATE TIME COMPLETE c Move the slider to the RUN position to complete changing the time What do do when the clocks go back in October and forward in March Your ST9120C is factory set to change the clock automatically at the correct dates so you should never need to adjust the clock forward or backwards yourself It is possible to disable this particular feature as described in the section Changing the Installer Parameters page 15 You may also check the section Configuration amp Service Data page 30 to see how your Installer has configured you
20. controls In order to save energy the following general points should be observed 1 Ensure your system contains a room thermostat where appropriate and that it is set to an appropriate temperature level typically 20 C 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 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 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 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 ST9120C CONTROLS LAYOUT EXTRA HOUR Ca ON1 OFF 1 ON2 OFF 2 ONS OFF3 Honeywell 1 Time Display 10 Boiler Status Indicator LoT Technology Display 11 Slider 12 Operating Mode Indicator Operating Mode Button OK Next Button 15 Clock and Buttons Holiday Button 17 Copy
21. day 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 13 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 information 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
22. e 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 has three 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 to stay on past midnight if required a Move the slider to the PROGRAMME position SET PROGRAMME will show briefly to verify this action SET PROGRAMME DAY TIME PROGRAMME RUN _ Honeywell NODE b SET ON TIME 1 will then be displayed and the time setting for the first ON 1 time for MONDAY will now be flashing to indicate it can be changed If you do not wish to change the time press the green OR button and move to the next step If you do wish to make a change use the or buttons to change the first ON 1 time Each press of the button will change the time by 10 minutes As soon as the time has been changed the message ON TIME 1 OK will be displayed Press the green Ok button to confirm the time is correct and move to the next step SAVED will be displayed for a moment to confirm that any change has been saved to memory Fa FMON MON D SET ON TIME ON TIME i OK fe k 7
23. e for the Installer to complete to indicate how your ST9120C and DT92E have been configured T9120C Configuration standard 24hr or am pm clock am pm display VY display 24hr display Display backlight operation Off on if button pressed on continuously Automatic time change disabled enabled 1 day or 5 2 day or 7 day 1 day operation operation 5 2 day operation 7 day operation Number of ON OFFs per 2 on offs per day ey on offs per day efault time programme standard at home econom ee a Optimum start no optimum start delayed start optimum start on Optimum start limit 1 hour 2 hours 3 hours more o ee a enabled Frost protection temperature From 5 to 16 C 5ce _ O O o o Minimum ON OFF time 1 2 3 4 5 minutes 1 minute o o o lt o peme o oo a Le per hour Proportional band width ___ From 1 5t03 0 C_ 15 C Failsafe mode loss ofRF of Jv communications CE i SS 30 50047645 005 A
24. eseacestacecaceetsaatnatpnesseusevianeiaastietiecetereees 6 Step 2 Running a Built in Programme 0 c cece eee eeeeeeeeeseneeeeeeneeeeeeentees 7 PROGRAMMING YOUR ST9120C The Built in Programmes Your Personal Programme c ccceeeteeeeeeees 8 Reviewing the Programme TimeS 0 60ee 9 9 1 Modifying the Programme oe Disabling Enabling Time Periods 0 cccccccccecceeseeceeeeeeeeeeseeeeeeseeeneeseeeeeeee 1 OPERATING YOUR ST9120C Choosing the Operating Mode Overriding the Operation Without Changing the Programmes sale The Extra Hour FUNCION secerneren a13 The Holiday Function ale Eng iiy ole tereeerepeemtemerrenerer tr nererrrerrs er rereren eye errerrrretrr e eE iire 14 FINE TUNING YOUR ST9120C Changing from AM PM Time Display to the 24 Hour Clock cceceeeees 15 Changing the Installer Parameters s QPUIMISAUIO Ms sossar AE Ea OA BOILER SERVICE REMINDER Countdown to Service When Service is Due ececceeeeeerns 18 SIULEGOWI A EE cenndteacetteesssantaresevec stayed Sonnets cutter sania E EEE 19 OPERATING YOUR DT92E Inquiring about the Set Temperature Adjusting the Set Temperature Switching Off Display Updates Heating Indicator Frost Protection DT92E OPERATING INDICATORS Low Battery Indicator Battery Replacement 0 0 ccccccseeeeeeeteeeeeteeee 21 RF Communications Indicator Lockout 2i DT92E ENERGY SAVIN
25. hanged To Select a Parameter Use the a and p buttons to move from one parameter to the next Stop at the Parameter you wish to change To Change a Parameter Use the standby button to select the parameter value then the a and y buttons to change the value Confirm the change by pressing the button again to take you back to the parameter To Exit Installer Mode Hold the button for 3 seconds to exit Installer Mode Note The Installer Mode will exit automatically after 10 minutes if no adjustments have been made in this time 24 Automatic Operation The BDR91T relay box simply switches the boiler on and off according to a wireless signal it receives from the ST9120C timer It is mainly used when the boiler is installed in a remote location where it may be difficult to run wires direct from the timer The green light indicates the status of the relay output Green light on relay on Green light off relay off Green LED el Red LED Temporary Manual Override In normal operation it should not be necessary to interact with the BDR91T However it is possible to press the button and temporarily override the current relay position This will be cancelled as soon as the Relay Box receives another signal from the ST9120C timer because automatic operation has a higher priority than manual operation Po Push button Loss of Wireless Communications If the RF communic
26. installed correctly the Signal Strength test feature allows the Installer to locate the system components where mutual signal reception is strong During communication signals are sent several times to ensure receipt and if any message is garbled the error detection software recognises this and ensures the message is repeated again What do do if RF communication is lost Follow the steps in the Troubleshooting Guide on the next page The most likely cause for loss of communications is the DT92E batteries running low on power This will be indicated on the DT92E display by a flashing battery symbol or the display may even be blank Simply replace the batteries as shown on page 21 and wait a few minutes for communications to become re established If this does not resolve the problem it may be that the RF signal path between the ST9120C and the DT92E is blocked by a metal object Check the direct path between the two devices and reposition any object that may be blocking the signal or move the thermostat How do know when to change the batteries in the DT92E room thermostat If the DT92E batteries need changing the battery symbol will flash on the DT92E display DT92E will continue to operate for at least 4 weeks after the indicator begins to flash The ST9120C will also show the message SENSOR LOW BATT and the radiator symbol m will flash It is important to change the DT92E batteries as soon as the low battery condition
27. is indicated as reduced battery power may affect the RF signal strength and impair RF communications Can I override the Timer from the DT92E thermostat As well as changing the set temperature from the DT92E it is also possible to override the heating system on or off from the DT92E This is only possible if the ST9120C is in AUTO or ONCE Modes If ST9120C is in CONT mode it will not be possible to switch the heating off from the DT92E Similarly if ST9120C is in OFF mode it will not be possible to switch the heating on from the DT92E If these latter overrides are required it is first necessary to change the ST9120C mode setting to AUTO or ONCE 27 Troubleshooting Guide This is a quick guide to help you diagnose and cope with possible problems with your wireless control system For further assistance please contact your Installer ST9120C has a blank LCD display ST9120C indicates the system is ON but radiators are cold and or taps are running with cold water ST9120C shows the message INTERNAL FAULT Every few seconds the ST9120C screen shows the message SERVICE I E Fons Although the heating is still operating the ST9120C screen keeps flashing the message N Pa gt SERVICE DUE 7 bi The ST9120C screen shows the message N gt SERVICE TA a ri IN a 28 No power to the heating system Check that there is power to the heating system Fault in ST9120C Temperatu
28. lise 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 1 OFF 1 ON 2 OFF 2 ON3 OFF 3 Monday to Friday 6 30am 8 30am 12 00pm 1 00pm 4 30pm 10 30pm Saturday amp Sunday 6 30am 9 30am 12 00pm 1 00pm 4 30pm 11 00pm Built in Programme Profile b ON 1 OFF 1 ON 2 OFF 2 ON3 OFF 3 Monday to Friday 6 30am 9 30am 12 00pm 1 00pm 4 30pm 11 00pm Saturday amp Sunday 6 30am 9 30am 12 00pm 1 00pm 4 30pm 11 00pm Built in Programme Profile C ON 1 OFF 1 ON 2 OFF 2 ON3 OFF 3 Monday to Friday 6 30am 7 30am 12 00pm 12 00pm 5 00pm 10 00pm Saturday amp Sunday 8 30am 9 30am 12 00pm 1 00pm 5 30pm 10 30pm Your Personal Programme The table below has been left blank for you to record your own personal programme ON 1 OFF 1 ON 2 OFF 2 ON 3 OFF 3 Monday Tuesday Wednesday Thursday Friday Saturday Sunday Reviewing the Programme Times To review your programme move the slider to the PROGRAMME position To review the programme times press the OK button repeatedly The appropriat
29. me The advantage here is that you do not have to remember to switch off because the normal time programme does this for you 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 typical 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 operate your heating The most obvious use is to switch heating OFF during the summer months but you may also use this feature if you take a mid week day off work you can then set the MODE to ONCE to keep the system ON during the day from the first programmed ON time ill the last programmed OFF time The way to use a Room Thermostat The way to set and use your room thermostat is to find the lowest temperature setting hat you are comfortable with and then leave it alone to do its job The best way to do this is to set the room thermostat to a low temperature say 18 C and then turn it up by one degree each day until you are comfortable with the temperature You won t have to adjust the thermostat further Any adjustment above this setting will waste energy and cost you more money DT92E has a green ECO button which enable
30. r from the display and the thermostat will control to its previous set temperature FINE TUNING YOUR DT92E Changing the DT92E Installer Parameters The DT92E 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 amp SERVICE DATA section However you may wish to alter some of the settings yourself and this section shows you how to do this INSTALLER Parameter Default Options Description PARAMETER Value Temperature tO 3 to 3 K Offset to measured measurement offset temperature Upper setpoint limit uL 35 21to Upper set temperature 35 C limit in C Lower setpoint limit LL 5 5 to 21 C Lower set temperature limit in C Energy saving ECO ES 18 5 to 35 C Energy saving ECO set setpoint temperature in C Reset parameters Parameter will be set to O to factory settings if any of the other param eter values have been changed Set to 1 to get back to factory settings 23 To Enter Installer Mode a Hold the button for 2 seconds until DT92E is in standby mode b Hold a and buttons for 3 seconds until the word Inst appears on the display c Press the a button The first parameter is now ready to be c
31. r product What should do if get lost while programming the ST9120C The LoT Display on ST9120C will provide you with help and tips to work through the programming Should you ever get lost the simplest thing to do is to move the slider to the RUN position and then move it back to the appropriate programming position where you got lost At this point just follow the instructions again What happens if there is a power failure In the event of a mains power failure the ST9120C display will go blank the indicator lamps will go out and the control outputs will switch off The real time will be constantly maintained by means of the built in battery backup ready to power back up as if nothing had happened when the mains power is restored In addition all programmes and settings are stored in a special memory called Non Volatile memory which requires no power to maintain information so will be retained indefinitely Should the correct time and date ever be lost for whatever reason the message SET DATE TIME will be displayed whilst the slider is in the RUN position In this case simply follow the procedure described under Step 1 Setting the Date amp Time page 6 It should not be necessary to make any changes to your programmes 26 How reliable is 2 way RF communication The 2 way RF communication also known as wireless communication used by Honeywell is extremely robust and reliable When
32. re controls are switched off or set too low Call Installer Check that the temperature controls in the system are set to appropriate levels Boiler or other system controls have malfunctioned Fault in ST9120C ST9120C is counting down the number of days until your next boiler service is due Your boiler service is overdue Your boiler service is overdue and the boiler has been automatically switched off to ensure your safety Call Installer Call Instal Arrange a boiler service before the counter reaches zero After servicing your boiler the Service Engineer Installer will reset the ST9120C to remind you when the next boiler service is due Each service is normally a maximum of 1 year apart Arrange an immediate boiler service After servicing your boiler the Service Engineer Installer will reset the ST9120C to remind you when the next boiler service is due Each service is normally a maximum of 1 year apart Arrange an immediate boiler service 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 th After servicing your boiler the Service Engineer Installer will reset the ST9120C to remind you when the next boiler service is due Each service is normally a maximum of 1 year apart FAQ AND TROUBLESHOOTI
33. ring and autumn at the changes between Greenwich Mean Time and British Summer Time You may be able to temporarily adjust the for example Override Advance or Boost These manufacturer s instructions The heating will not work water has reached the correct temperature approved by Plain English Campaign simply switches the heating system on and off as necessary It works by sensing ing it off once this set temperature has been reached Turning a room thermostat to not make the room heat up any faster How quickly the room heats up depends on he design of the heating system for example the size of boiler and radiators Neither does the setting affect how quickly the room cools down Turning a room thermostat to a lower setting will result in the led at a lower temperature and saves energy The heating system will not work if a ime switch or programmer has switched it off The way to set and use your room thermostat is to find he lowest temperature setting that you are comfortable with and then leave it alone to do its job The is to set the room thermostat to a low temperature say 18 C and then turn it up by one degree each day until you are comfortable with the temperature You won t have to adjust the Any adjustment above this setting will waste energy and cost you more money f your heating system is a boiler with radiators there will usually be only one room thermostat to control the
34. rvice visit as this will allow you to comply with the law and ensure your gas boiler is operating safely kT Z ia A SERVICE DUE 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 a or buttons The set temperature will be fonaywxel 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 iT ll 3 eo em _ gt 19 Switching Off Pressing the off standby button ees 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 ee C O To switch back on simply press P 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
35. s you to set a period of time at a lower emperature This energy saving feature is most useful if you are out of the house for a few hours or if you want a reduced temperature for a while and don t want to have to remember to turn the temperature back up see pages 22 amp 23 for details Control of Your Boiler There are two ways your boiler may be controlled It may be switched directly using he ST9120C timer or if installed in a remote location it may be switched using a BDR9Q1T relay box n each situation the operation of the boiler is determined automatically by the combination of inputs from the room thermostat and the timer and in such a way as o maintain your comfort with minimal energy use The timer will indicate the on off status of the boiler by showing the flame symbol Optimisation see page 17 for explanatory diagrams Your control system has some features called Optimisation which aim to save energy while making you as comfortable as possible These may or may not be enabled check page 30 where your Installer should have indicated how these were set Optimisation does not apply to your Hot Water only to your Heating and will only work if you have a DT92E in your system 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
36. 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 amp System Service Log e Acontact 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 SERVICE I m i DAYS 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 18 Se 7 Fain Ld CONT ONCE CEU OFF BOILER SERVICE REMINDER 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 1 display the message On 1h as shown However Lat i you should still arrange an immediate se
37. ttings 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 24hr or am pm 1 12 12 24 12 am pm display clock display 24 24hr display Configure backlight 2 2 0 1 2 0 off operation 1 onif button pressed 2 on continuously Enable disable auto 3 1 0 1 0 disabled time change 1 enabled 1 day or 5 2 day or 4 7 1 5 7 1 1 day operation 7 day operation 5 5 2 day operation 7 7 day operation Number of ON OFFs 5 3 2 3 2 2 on offs per day per day 3 3 on offs per day Select default time A A b C A standard programme b at home C economy Set hot water 60 C 40 to Stored hot water set temperature 85 C temperature 15 FINE TUNING YOUR ST9120C INSTALLER Parameter Default Options Description PARAMETER Number Value Optimum start Ea Optimum start limit Optimum stop Frost protection 1 5 temperature 1 5 0 1 2 0 no optimum start 1 delayed start 2 optimum start on 1 2 0 1 0 disabled 1 enabled 5to Frost protection 16 C temperature k 2 Minimum ON OFF time in minutes Minimum ON OFF ime Proportional band 1 width Failsafe mode loss of 1 RF communications Reset all parameters 2 To Enter Installer Mode 1 1 14
38. ut making any changes e After setting or reviewing the last off time OFF 3 the message COMPLETE will be displayed to indicate the times for Monday have been set You now have a choice of how to set the programme for the next day Copying One Day s Programme to Another Day example Monday to Tuesday f Whilst the day is showing Monday Press the COPY DAY button The message COPY MON TO TUESDAY OK will be displayed and the letters TUE will flash to indicate the programme for Monday can be copied to Tuesday g Toselect a different day to copy to press the NEXT DAY button to cycle through the days With each press of the NEXT DAY button the message will change to indicate the new day you are copying to h When the required day is indicated press the green button to confirm and the message MON COPIED will be displayed for a moment The day into which Mondays programme has been copied is now available to have its programme edited Note Once a day s programme has been confirmed in this way it now becomes the day whose programme is copied if the COPY DAY button is pressed again OR Programming a Different Day i Press the NEXT DAY button to select the next day which is displayed along the top of the screen The programme for that day can then be adjusted by following steps b e above Programmes for the remaining days can be set in the same way using the NEXT DAY button to move to the next day 10 PR
39. whole house But you can have different temperatures in individual rooms by installing or valves TRVs on individual radiators If you don t have TRVs you should choose is reasonable for the whole house If you do have TRVs you can choose a slightly igher setting to make sure that even the coldest room is comfortable then prevent any overheating in other rooms by adjusting the TRVs need a free flow of air to sense the temperature so they must not be covered by curtains or blocked by furniture Nearby electric fires televisions wall or table lamps may prevent the hermostat from working properly Honeywell Control Systems Ltd Arlington Business Bracknell Berkshire RG12 1EB Park Technical Help Desk 08457 678999 50047645 005 A www honeywelluk com 2011 Honeywell International Inc System Components This section is to be completed by the Installer Location ST9120C typically in living room or hallway BDR91T f installed typically next to boiler Energy Efficiency and the Environment Home energy use is responsible for more than 1 4 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
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