User Guide - Honeywell
Contents
1. 14 Changing from AM PM Time Display to the 24 Hour Clock Your ST9520C 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 ST9520C 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 Note some parameters indicated by may only be viewed if the previous parameter is set to a particular value 24hr or am pm 1 12 12 24 12 am pm display clock display 24 24hr display Configure backlight 2 2 012 0 off operation 1 on if button pressed 2 on continuously Enable disable auto 3 1 0 4 0 disabled time change 1 enabled 1 day or 5 2 day or 4 T 1 5 7 1 1 day operation 7 day operation 5 5 2 day operation2. 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 zone OVERRIDE button and the heating will come on in that zone until the next programme time at which point it will follow the normal programme 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 appropriate 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 buttons allow you to select how you want to operate the heating in each zone independently 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 till 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 s
3. PLEASE RESPECT YOUR ENVIRONMENT Take care to dispose of this product and any packaging or literature in an appropriate way 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 Clarity approved by Plain English Campaign WHAT IS A ROOM THERMOSTAT an explanation for Householders as recommended by the E
4. Zone 2 ON period indicator O Zone 2 Extra Hour Button O Zone 2 Indicator Lamp Zone 2 Override Button Zone 1 Override Button 11 Boiler Status Indicator 23 Zone 1 Indicator Lamp Slider Zone 1 Extra Hour Button 13 Zone 2 Operating Mode Indicator Zone 2 Operating Mode Button OK Next Button Clock and Buttons Zone 1 Operating Mode Button 18 Zone 1 Operating Mode Indicator Holiday Button 20 Copy Day Button Next Day Button Keep this document in a Home Information Pack DT92E CONTROLS LAYOUT ECO Mode Active Frost Protect Indicator ECO Countdown Indicator 4 Heating Demand Indicator O Setpoint Change Buttons O ECO Button Q OFF Standby Button O OFF Standby Indicator O RF Communications Indicator 10 Battery Low Indicator 11 Fault Indicator 12 Setpoint Indicator Temperature Display Honeywell ZONE ID NUMBER Zone ID number CONFIGURATION amp SERVICE DATA Configurable Features Options Factory Installer configured setting note value DT92E Configuration Po C C d Zonei Zone 2_ Measurement offset 3 0 Ctodto3 0c o Upper setpoint limit 2ito3sec 85 C TCT Lower setpoint limit Isto2zvrc CT sef J Energy saving ECO setpoint 5 to 35 C 180 T 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
5. the ST9520C is overdue service screen keeps flashing the message After servicing your boiler the Service Engineer Installer will reset the ST9520C to remind N 7 SERVICE DUE L you when the next boiler service 7 N is due Each service is normally a maximum of 1 year apart 28 FAQ AND TROUBLESHOOTING Symptom The ST9520C screen shows the message Fa a SERVICE DUE OF ST9520C shows the message SENSOR LOW BATT and a flashing radiator symbol DT92E shows a flashing battery symbol DT92E display is blank Possible Cause Your boiler service is overdue and the boiler has been automatically switched off to ensure your safety Your DT92E batteries are running low on power Remedy Arrange an immediate boiler service If set to do so it may be possible to obtain limited use of the boiler by pressing any 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 After servicing your boiler the Service Engineer Installer will reset the ST9520C to remind you when the next boiler service is due Each service is normally amaximum of 1 year apart Change the DT92E batteries for the indicated zone thermostat see page 21 for how to do this 29 FAQ AND TROUBLESHOOTING Symptom ST9520C shows the message NO SIGNAL and a flashing radiator symbol 111 for one of
6. 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 F 60 C 40to Stored hot water set temperature 85 C temperature F Not used in this system 15 FINE TUNING YOUR ST9520C 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 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
7. Programme The zone 1 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 the zone to stay on past midnight if required a Move the slider to the ZONE 1 position SET ZONE 1 will show briefly to verify this action ZONE 1 ZONE 2 DAY TIME SET ZONE O ZONE 1 O ZONE 2 RUN za za Honeywell 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 Ok 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 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 ZONE 1 ZONE 2 MON SET ON TIME ie F qs in XOY onz ons OFFI OFF2 OFFS 1O N Ol BH ONI ON2 ON3 OFF1 OFF2 OFF z Honeywell RL Honeywell Note When pressing the button the next ON or OFF marker may start to flash This indicates you have tried to set a
8. a break in the OpenTherm wiring between the ST9520C and the boiler If in doubt call your Installer 31 32 33 Application Insert application number as per Installation wiring diagrams Configuration Data to be completed by Installer The tables below are for the Installer to complete to indicate how your ST9520C and DT92E have been configured ST9520C Configuration standard 24hr or am pm clock display Display backlight operation Automatic time change 1 day or 5 2 day or 7 day operation Number of ON OFFs per day Default time programme Hot water set temperature Optimum start Optimum start limit Optimum stop Frost protection temperature Minimum ON OFF time Cycle rate Proportional band width Failsafe mode loss of RF communications 24hr display Off on if button pressed on continuously disabled enabled 1 day operation 5 2 day operation 7 day operation 2 on offs per day sonar per ay A standard b at home C econom no optimum start delayed start optimum start on 1 hour 2 hours 3 hours ne e enabled Fom5o et se oOo o 7 2 3 4 5minutes Imne per hour From 1 5t03 0 C 15C O i o d_ o fon 20 O o ST9520C Configuration OpenTherm OpenTherm Heating Limit temperature Low load operation 34 disabled Y enabled 50047645 006 A
9. and Service Personnel This information is important for a Home Information Pack Service Installation Installation Service Date Engineer Telephone Number Contact Details 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 35 Contents CONTROL OF YOUR SYSTEM General Description of Controls in Your System The way to use a Programmer The way to use a Room Thermostat Control of Your GETTING
10. 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 ers will switch the DT92E into off G standby mode The symbol will show in the display and the unit will control at the frost protect setpoint as set at the ST9520C To switch back on simply press ee 9 the button again se Display Updates To conserve battery power DT92E only communi cates with ST9520C 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 ST9520C and the DT92E display being updated If you press a button on DT92E it may take a few seconds for ST9520C 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 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 wil
11. heating off from the DT92E Similarly if ST9520C 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 ST9520C mode setting to AUTO or ONCE 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 ST9520C has a blank LCD No power to the Check that there is power to the display heating system heating system Fault in ST9520C Call Installer ST9520C indicates that Temperature controls Check that the temperature Heating Zones are ON but are switched off or controls in the system are set to radiators are cold set too low appropriate levels Boiler or other Call Installer system controls have malfunctioned ST9520C shows the Fault in ST9520C Call Installer message INTERNAL FAULT Every few seconds the ST9520C is Arrange a boiler service before ST9520C screen shows the counting down the the counter reaches zero message number of days P After servicing your boiler the until your next boiler service is due Service Engineer Installer will SERVICE DUE reset the ST9520C to remind j 1 you when the next boiler service Eo is due Each service is normally fam Samy DAYS a maximum of 1 year apart Although the heating is still Your boiler service Arrange an immediate boiler operating
12. 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 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 butto
13. 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 ST9520C 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 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 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 without 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 Copyi
14. 1 00pm 4 30pm _ 11 00pm Saturday amp Zone 1 6 30am _ 9 30am 2 00pm 1 00pm 4 30pm_ _ 11 00pm Sunday Zone 2 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 Zone 1 6 30am _ 7 30am 2 00pm 12 00pm 5 00pm 10 00pm Friday Zone 2 6 30am _ 7 30am 12 00pm 12 00pm 5 00pm 10 00pm Saturday amp Zone 1 8 30am _ 9 30am 2 00pm 1 00pm 5 30pm_ 10 30pm Sunday Zone 2 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 Zone 1 Zone 2 Tuesday Zone 1 Zone 2 Wednesday Zone 1 Zone 2 Thursday Zone 1 Zone 2 Friday Zone 1 Zone 2 Saturday Zone 1 Zone 2 Sunday Zone 1 Zone 2 Reviewing the Programme Times To review your zone 1 programme move the slider to the ZONE 1 position To review your zone 2 programme move the slider to the ZONE 2 position To review the programme times press the OK 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 OK button Remember to return the slider to the RUN position after reviewing is complete Modifying the Zone 1
15. GY SAVING ECO FEATURE Entering ECO Mode and Setting the Energy Saving Time Period Howto EXI ECO MOJE s sesavccczsevesstazcccucnessuapecsenannen cdc cies ceamntntareescateiyeatoneyaeee Heute 23 FINE TUNING YOUR DT92E Changing the DT92E Installer Parameters ce seeessseeeeeeneesetseneraeeeeeeneeee 23 OPERATING YOUR BDR91T RELAY BOX IF INSTALLED BDR91T Controls Layout Automatic Operation cee eceeeeeeteeeteeeeneneeees 25 Temporary Manual Override Loss of Wireless Communications 00 25 FAQ AND TROUBLESHOOTING Frequently ASk d QueStiONS icc ces scccceseesvaessdssncne gett cctizes capsauveceeseeteds saceneseendeceeten 26 Troubleshooting Guide CONFIGURATION amp SERVICE DATA Configuration Data to be completed by Installer 31 General Description of Controls in Your System Your Honeywell ST9520C provides timing control for both zones in your central heating system letting you set ON and OFF periods to suit your own lifestyle The ST9520C 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 and both heating zones can be set at different times from each other ST9520C also has a Boiler Service reminder Shut down feature which helps ensure your gas boiler is regularly serviced in complian
16. N 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 for Zone 1 and or Zone 2 The operating mode may only be changed when the slider is set to the RUN position A iti symbol is shown at the Zone 1 or Zone 2 side of the display during a programmed on period for that zone A green INDICATOR LAMP shows when the zone is switched ON Two MODE buttons are provided to select the Operating Mode and therefore how the zones are controlled Each zone has four possible Operating Modes these are OFF AUTO ONCE CONT Pressing the MODE button for each zone scrolls round these modes in sequence and the display indicates which mode is currently active ZONE 1 ZONE 2 ZONE 1 ZONE 2 SAT SAT 19 05 2910 19 05 2010 m fa apg fo o ALIS cox LN Po uo OFF o gt Honeywell Honeywell e OFF mode The zone will remain OFF e AUTO Automatic mode The zone will be switched ON and OFF according to the zone programme e ONCE mode The zone will come ON at the first programmed ON time and go OFF at the last programmed OFF time e CONT Continuous mode The zone will remain ON continuously Overriding the Operation Without Changing the Programmes In AUTO and ONCE operating mo
17. STARTED WITH YOUR ST9520C Step 1 Setting the Date amp Time ec eeescsessseccssssseeceeceseneeeesenseseceaesataceassanatees Step 2 Running a Built in Programme PROGRAMMING YOUR ST9520C The Built in Programmes Your Personal ProgramMmMe ccceceeeeeeeeeteeseenees 8 Reviewing the Programme Times Modifying the Zone 1 Programme 9 Modifying the Zone 2 Programme Disabling or Enabling Time Periods ld OPERATING YOUR ST9520C Choosing the Operating MOS sssrini misein 12 Overriding the Operation Without Changing the Programmes wa dee The Extra Hour Function The Holiday Function als EnguUiy MOG Ge vheczsxzcsnstesscsasa aren n aoee Asaa EA Ra aaie ES EARI ETON 14 FINE TUNING YOUR ST9520C Changing from AM PM Time Display to the 24 Hour COCK 15 Changing the Installer Parameters 0 0ccceeeeeeees Pals OPLIMISALION seis isis inneir siauros i entei RE EON eer eestor eee 17 BOILER SERVICE REMINDER Countdown to Service When Service is Due cece eee ereeteeeeteeeneestees 18 SMUEAOW Mita cctasnsevenneasiaztiteasececoancananesseactaneyndaaun bdnie aa ia aiii 19 OPERATING YOUR DT92E Inquiring about the Set Temperature Adjusting the Set Temperature 19 Switching Off Display Updates Heating Indicator Frost Protection 20 DT92E OPERATING INDICATORS Low Battery Indicator Battery Replacement RF Communications Indicator Lockout 21 DT92E ENER
18. able as possible These may or may not be enabled check page 34 where your Installer should have indicated how these were set Optimisation does not apply to your Hot Water only to your Heating 5 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 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 symbols on ST9520C will flash to let you know whenever Optimisation is operating in each zone The other controls in your system should not require adjustment Your ST9520C 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 ST9520C will display text mess
19. ages at every stage to help you get the most out of your central heating system The ST9520C uses LoT Technology to constantly update the display to give you feedback about what is required Step 1 Setting the Date amp Time Your ST9520C 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 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 ZONE 1 ZONE 2 DAY TIME SET THE py ZONE 1 26 J ZONE 2 f lt RUN ma a Honeywell HODE 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 o
20. ate temperature controls In order to save energy the following general points should be observed 1 Ensure your system contains room thermostats in 2 seperate zones and that both are set to appropriate temperature levels typically 20 C for the main occupied zone and 18 C for the less occupied zone typically the bedrooms 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 ST9520C CONTROLS LAYOUT OVERRIDE ON1 ONZ gt ONS OFF1 OFF2 OFF3 Honeywell Zone 1 ON period indicator Time Display LoT Technology Display O Programme Time Markers Day of Week Indicator Q FF Symbol
21. ce with UK Gas Safety Regulations For more details see pages 18 amp 19 Your system includes DT92E wireless room thermostats and may include a BDR91T Relay Box to switch your boiler remotely 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 ST9520C and associated controls to provide the most home comfort at the least cost The way to use a Programmer Think about the time periods when you are typically in the house and when you are not and also the times when you occupy each of the zones 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 Programmer 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 Programmer to enhance comfort and convenience for example OVERRIDE EXTRA HOUR and MODE buttons
22. des the OVERRIDE button switches the zone ON or OFF without altering the programme When the appropriate MI symbol is displayed pressing the OVERRIDE button switches the zone OFF until the next programmed ON time If the appropriate MI symbol is not displayed pressing the OVERRIDE button switches the zone 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 buttons allow you to switch the zone ON for up to 3 extra hours without altering the programme Pressing either button once will give one extra hour The LoT Display will display the message 1 HR to confirm the button has been pressed When the zone is OFF the appropriate MII symbol is not displayed pressing an EXTRA HOUR button switches the zone ON for just one hour When the zone is ON the appropriate MI symbol is displayed pressing an EXTRA HOUR button extends the programmed ON period by one hour Further presses of the EXTRA HOUR buttons 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
23. e event of a mains power failure the ST9520C 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 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 caus
24. e 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 ST9520C 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 ST9520C will also show the message SENSOR LOW BATT and the appropriate radiator symbol um will flash for either Zone 1 or Zone 2 It is important to change the DT92E batteries as soon as the low battery condition is indicated as reduced battery power may affect the RF signal strength and impair RF communications 27 Can I override the Programmer 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 ST9520C is in AUTO or ONCE Modes If ST9520C is in CONT mode it will not be possible to switch the
25. e unit is left in ZONE 1 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 Modifying the ZONE 2 Programme The zone 2 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 the heating to stay on past midnight if required a Move the slide switch to the ZONE 2 position SET HEATING will show briefly to verify this action DAY TIME Q SET ZONE 2 ZONE 1 O ZONE 2 RUN a E Honeywell b Now follow the same procedure to set the times as described in Modifying the Zone 1 Programme page 9 steps b to i Exiting ZONE 2 Programming Mode To exit ZONE 2 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 f the unit is left in ZONE 2 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 finish programming or move the slider to the RUN position Disabling or Enabling Time Periods for Zone 1 and or Zone 2 To disable any of the time periods ON 1 to OFF 1 ON 2 to OFF 2 or O
26. essage 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 ST9520C Programmer 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 ST9520C page 8 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 is no tick the product normally leaves the factory with Pr matter to select one of the other profi Built in Programme Profile A icked the box alongside it If there ofile A installed but it is a simple es see Changing the Installer Parameters page 15 ON 1 OFF 1 ON 2 OFF 2 ON3 OFF 3 Monday to Zone 1 6 30am _ 8 30am 12 00pm 1 00pm 4 30pm 10 30pm Friday Zone 2 6 30am_ 8 30am _ 12 00pm 1 00pm 4 30pm_ _ 10 30pm Saturday amp Zone 1 6 30am _ 9 30am 12 00pm 1 00pm 4 30pm_ _ 11 00pm Sunday Zone 2 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 Zone 1 6 30am _ 9 30am 2 00pm 1 00pm 4 30pm 11 00pm Friday Zone 2 6 30am_ 9 30am _ 12 00pm
27. et 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 enables 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 several ways your boiler may be controlled It may be switched directly using the ST9520C timer If installed in a remote location it may be switched using a BDR9Q1T relay box If your boiler supports the OpenTherm communications system it may be connected to the ST9520C timer by OpenTherm wiring over which the control information is sent In 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 to 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 comfort
28. 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 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 a radiator symbol MT will flash to indicate Optimisation is taking place The diagrams below illustrate how Optimisation works Optimum Start Optimum Stop Optimum Start Programmed T
29. ime 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 ST9520C Programmer 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 ST9520C will display a message on the screen to remind you that a boiler service is due e If the service is overdue the Programmer 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 35 of this guide in the section Boiler amp System Service Log e Acontact telephone number may also have been programmed into the ST9520C If so a message will appear on the LoT Display indicating the number you should call Countdown to Service Your ST9520C can indicate a countdown for the number of days until your service is due This SERVICE DUE message will appear on the screen every few pa 1 seconds to give you an opportunity to schedule L Fons a
30. l 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 ST9520C 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 ST9520C 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 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 numbe
31. n presses the function will cancel itself automatically and return to normal operation 13 Enquiry Mode As the heart of your system the ST9520C 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 ST9520C will return to RUN mode Zone 1 temperature setting Z1 SET Zone 2 temperature setting Z2 SET OpenTherm fault information OPENTHERM sss This information will only be shown if OpenTherm communications is enabled and if there is a fault on the display means the OpenTherm communications has stopped If the display shows F followed by a number this is a fault code sent by the boiler See FAQ AND TROUBLESHOOTING section for advice
32. nergy Savings Trust A room thermostat simply switches the heating system on and off as necessary It works by sensing he air temperature switching on the heating when the air temperature falls below the thermostat setting and switching it off once this set temperature has been reached Turning a room thermostat to a higher setting will 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 e i affect how quickly the room cools down Turning a room thermostat to a lower setting will result in th room being controlled at a lower temperature and saves energy The heating system will not work a time switch or programmer has switched it off The way to set and use your room thermostat is to ind the lowest temperature setting that 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 he thermostat further Any adjustment above this setting will waste energy and cost you more money your heating system is a boiler with radiators there will usually be only one room thermostat to control the whole house But you can have different temperatures in individual rooms by installing hermostatic radiator
33. ng 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 Exiting ZONE 1 Programming Mode To exit ZONE 1 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 th
34. out Push button Green light relay status indicator Red light indicator for special modes or loss of communications Automatic Operation The BDR91T relay box simply switches the boiler on and off according to a wireless signal it receives from the ST9520C 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 cal 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 ST9520C because automatic operation has a higher priority than manual operation Ga Push button Loss of Wireless Communications If the RF communication 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 31 When RF communication is restored the Relay Box will automatically return to normal operation 25 How do set the time only if the ST9520C clock is not correct Your ST9520C contains an accurate digital clock that is factory set Should you ever need to change the time just follow this proced
35. r 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 amp 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 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 m
36. r 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 disappear 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 sec
37. service visit When Service is Due a ne 3nin When your boiler service is OVERDUE the words A 06 29 i0 SERVICE DUE will continue to flash on your ee screen and you should arrange an immediate 7 R Taw service visit CONT A Li CONT ONCE ONCE ao a OFF OFF 18 BOILER SERVICE REMINDER Shut down If your ST9520C 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 any 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 service 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
38. the zones DT92E shows a flashing RF symbol ST9520C shows the message NO SIGNAL and a flashing flame symbol a Red light on BDR9Q1T if installed is lit continuously ST9520C shows the message SENSOR FAULT and a flashing radiator symbol DT92E display shows and a flashing spanner symbol ST9520C shows the message OPENTHERM FAULT 30 Possible Cause Your DT92E batteries are running low on power Change the DT92E batteries see page 21 for how to do this RF communication path between ST9520C and DT92E is blocked possibly by a metal object RF communication path between ST9520C and BDR91T is blocked possibly by a metal object Fault with DT92E Fault with the Opentherm boiler The Opentherm wiring is broken or disconnected or Opentherm has been configured but the wiring has not been connected 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 product and re position any objects that may be blocking the signal Installer Enter Enquiry Mode as described on page 14 use the or buttons to scroll round to a display that says OPENTHERM A fault code may be shown on the main display Refer to the Boiler manufacturer s instructions for the required action If the display shows this means there is
39. tion 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 changed 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 fy 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 BDR91T Controls Lay
40. ure 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 ST9520C 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 34 to see how your Installer has configured your product What should do if get lost while programming the ST9520C The LoT Display on ST9520C 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 th
41. valves TRVs on individual radiators If you don t have TRVs you should choose a temperature that 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 Room thermostats 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 Park Bracknell Berkshire RG12 1EB Technical Help Desk 08457 678999 50047645 006 A www honeywelluk com 2011 Honeywell International Inc System Components This section is to be completed by the Installer Location ST9520C typically in living room or hallway DT92E Zone 2 typically in bedroom or upstairs hallway BDR91T If 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 Programmer should be used in conjunction with appropri
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