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A.O. Smith Cyclone BFC - 60 Installation Manual

1. 1 brown 2 blue 3 green 4 black 5 white 6 grey beige A 1 3 je 1 5 x x x J2 3 e o x E 0 Ja Ea ES O x j OCO Ki 7 D xE 16 ejf15 JP2 2 6 14 els a Jaa ra 12 0 e 1 B a x x e elele a6 O X Ble 5 alo els 2 e 1 J20 des xt P x xixix x 3 Ta a 7 6 D v2 4 JP4 aN EAS ps Q 6 J21 x x 6 x x x x 3 2 oO 6 E xx e J19 JP5 x x R 7 6 1 ya x x x x x J35 e xx T To ag 3 J34 s p S O x3 x 8 J29 2 gt JPG x x x x x x E TE e i T x x4 JP8 3 x2 asl On sso X x x JP12 aa O Poe 7 u36 x x x J37 xx i d a a al N ol E 109000 2 oa of a a al e al o 2 3l4 5 6 o 11 12 13 1 16 17 18 19 20 21 22 23 24 T 4 I e e NNI L N M 0 i 2 3 e H NOL N Le 4 Primair Secundi K LA i on 0307 579 R1 2 NL Instruction manual BFC EJA
2. 49 Electronic controller ON OFF switch 49 Navigation buttons 49 PC connection 50 Status of the appliance 51 Introduction 51 Operating modes 51 Error conditions 52 Service condition lt lt lt lt lt lt 53 5 10 11 12 13 14 15 16 9 1 9 2 9 3 10 1 10 2 10 3 10 4 11 1 11 2 11 3 11 4 11 5 11 6 11 7 11 8 11 9 11 10 11 11 11 12 12 1 12 2 12 3 12 4 12 5 12 6 12 7 12 8 12 9 12 10 13 1 13 2 13 3 14 1 14 2 15 1 15 2 15 3 15 4 15 5 16 1 Table of contents Starting and running 55 Introduction lt lt lt lt lt lt e e eee eee ee eee 55 Starting and running 55 The appliance s heating cycle 55 Shutting down 2 57 Introduction 57 Shut the appliance down for a brief period OFF mode 57 Electrically isolating the appliance 57 Shutting the appliance down for a long period 57 Main menu 222 2222222222205 59 Introduction 59 Notational co
3. 13 Introduction 13 General working principle of the appliance 13 The appliance s heating cycle 14 Protection for the appliance 14 Safety of the installation 16 Installation lt lt lt 47 Introduction 17 Packaging ee ee ee eee 17 Environmental conditions 17 Technical specifications 20 Installation diagram 23 Water connections Unvented 24 Water connections Vented 25 Gas connection 26 Air supply and flue 26 Electrical connection 32 Checking the supply pressure and burner pressure 36 Conversion to a different gas category 39 Filling eee eee eee 43 Filling the appliance 44 Draining eee eee 45 Draining unvented installations 46 Draining vented installations 46 The control panel 49 Introduction 49 Controls 49 Meaning of icons
4. Instruction manual BFC 75 Code Description Solution Remark F03 lock out error Damaged wiring Open 1 Check the wiring between the pressure switch and the If the error cannot be resolved or is persistent contact your circuit controller installation engineer To replace the necessary parts you must contact your installation engineer The pressure switch fails to work correctly If necessary replace the wiring Pressure switch not Check the running speed of the fan 12 5 Display the selected closing appliance Check that the hoses on the pressure switch and the air supply hose between fan and burner are correctly fitted Refit them if necessary Check for cracks in the hoses on the pressure switch and in the air supply hose between fan and burner If necessary replace the hoses Check that the flue gas outlet is compliant 3 9 Air supply and flue Check for blockage in the flue gas discharge Remove any blockage that may be present Check for blockage in the condensation water discharge Remove any blockage that may be present Measure the pressure differential across the pressure switch See the table in Preparation for maintenance 15 2 Preparation for maintenance If there is insufficient pressure differential clean the heat exchanger If the pressure differential is acceptable check that the pressure switch is closing using a multimeter Instruction manual BFC 76 Code Des
5. To replace the fuses you must contact your installation engineer 70 Symptom Water leakage Leakage from a water connection threaded Solution Tighten the threaded connection Condensate leakage Check that the condensation water discharge is working properly Rectify if necessary Leakage from another nearby water appliance or pipe segment Trace the leak Leakage from the appliance s tank Consult the supplier and or manufacturer Y De If the leak persists consult your installation engineer Explosive ignition Incorrect supply pressure and or burner pressure Set the correct supply pressure and or burner pressure 3 11 Checking the supply pressure and burner pressure Contaminated burner Clean the burner s 15 4 2 Clean the burner s Contaminated orifice Clean the orifice s 15 4 3 Clean the orifice s If ignition is not improved consult your installation engineer Hot water supply insufficient or absent Appliance is turned off Start the appliance up 9 Starting and running No supply voltage present 1 Check if the isolator is ON 2 Check that there is power to the isolator 3 Check whether the ON OFF switch of the electronic controller is ON position l 4 Check whether there is power to the electrical connector block 5 The measured voltage must be 230 VAC 15 10 See the BFC electrical diagram 17 Appendices I
6. 2 4 3 2 4 4 2 4 5 Instruction manual BFC A lockout error of the water heater controller takes place The controller must be manually reset before the appliance can resume operation 8 3 Error conditions The reset may only be performed if T4 lt 78 C Gas valve The electronic controller opens the gas valve so that gas can be supplied to the burner As a safety measure the gas valve has a double shut off The double shut off guarantees complete isolation of the appliance from the gas supply To help ensure smooth ignition the gas valve opens gradually softlite Fan The fan 18 provides an optimum air supply when there is a heat demand As a safety feature the fan ensures that any gases present in the combustion chamber are removed both before and after combustion We refer to this as pre and post purge The fan speed is continuously monitored by the electronic controller 4 The electronic controller takes control if the speed of rotation varies too much from the set value Pressure switch The pressure switch ensures the discharge of flue gases and the supply of incoming air during the pre purge and normal running of the appliance The default state of the pressure switch is open When sufficient pressure difference is reached the pressure switch closes However in the event of a fault the pressure switch is tripped open and the heating cycle is interrupted The table shows the trip point per applian
7. GAS 7 The control panel 7 1 Introduction Topics covered in this chapter e Controls Meaning of icons Electronic controller ON OFF switch e Navigation buttons e PC connection 7 2 Controls The figure shows the electronic controller 0063 IMD 0423 RO The control panel is completely menu driven and comprises e a4 line display with 20 characters per line 6 pushbuttons for operating the appliance below the display 6 graphical symbols above the display aconnector for a service PC an ON OFF switch The pushbuttons are divided into three groups e Navigation buttons Buttons for UP and DOWN y Enter ENTER Reset button RESET the main menu 11 Main menu 4 e the service program 12 Service program This chapter is specifically intended for the service and maintenance engineer and installation engineer In this manual the display of the electronic controller is shown as in the figure both with and without icons Instruction manual BFC HeaeBaw START OPERATION CHANGE SETPOINT Teet 7fB E 7 3 Meaning of icons The table explains the meanings of the icons Icons and their meaning Name Meaning Heat demand Heat demand detected Purge Pre and post purge using fan a E Pressure switch Pressure switch is closed Glowing Pre glow Gas control Gas control open ignition b O Flame
8. Air supply Thin walled galvanised sheet steel Pipe diameters Flue BFC 28 80 mm BFC 30 50 60 100 mm Air supply BFC 28 125mm BFC 30 50 60 150 mm 1 No other wall flue terminal is permitted manufacturer or wholesaler 30 Use this item number to order the wall conduit set from supplier Instruction manual BFC El 3 9 4 Parallel connections The table states the maximum pipe lengths for parallel systems The maximum pipe length depends on the chosen diameter Y Warning Install flue component pipe runs with a run off of 5 mm per metre Flue gas outlet requirements for parallel systems Appliance Diameter Maximum Lequivalent Lequivalent total length 90 bend 45 bend BFC 28 80mm 25m 3 9m 1 1m BFC 30 100mm 80m 4 6m 1 2m BFC 50 100mm 45m 4 6m 1 2m BFC 60 100mm 25m 4 6m 1 2m BFC 28 100mm 100m 4 6m 1 2m BFC 30 130mm 100m 2 4m 1 4m BFC 50 130mm 100m 2 4m 1 4m BFC 60 130mm 100m 2 4m 1 4m 1 Parallel systems with diameter of 130mm or 150mm If the maximum total length for a diameter of 130mm is insufficient 150mm diameter must be used Any diameter enlargement must be carried out on both air supply and flue gas outlet You must use the longest pipe when calculating the pipe length For example if the chimney pipe is 35 metres and the air supply pipe is 32 metres use 35 metres as the length for the calculation Next add the Lequivalent for
9. pl ete cn CA Li a cy Tset PLIME ED by gt 5 Pa 11 7 2 Week program setting the switch off time 1 Use and y to set the hours In the example this is 12 Confirm with ENTER The cursor moves to the minute digits which flash OH OFF mo Tset PLE E A if 2 Use t and y to set the minutes In the example this is 45 Confirm with ENTER The cursor moves to the desired water temperature CH SU esis OFF SU 12145 Tset 65 T PUMP OH SALE 11 7 3 Week program setting the water temperature 1 Use 4 and y to set the water temperature In the example this is 75 C Confirm with ENTER The cursor moves to FUIRIF OH DH OFF Tset FUMF 40H SAE 61 11 11 7 4 Week program setting the program controlled pump Main menu 1 Ifrequired a pump can be controlled during the period Use tand Y to set FHMF OH The pump ensures a regular circulation of hot water in the hot water pipes You can skip this step if you there is no pump in your hot water circuit Confirm with ENTER The cursor moves to SALE DH OFF Tset PUMP 0H SANE 2 Confirm with ENTER The display shown in the figure will appear DAY TIME OH 50 02 13 OFF SU 12 45 0H MO Bel ae OFF MO 23133 OH TU Bela OFF Til 23153 3 If you wish you can use Y to scroll to another day and change more switch on times 11 7 1 Week program setting the switch on time and switch off times 1
10. C Solution None This is a temporary message that may appear from time to time but will disappear automatically js Y E03 lock out error Error in temperature sensor T4 at the top of the tank The two temperature sensors in the tank detect a differential of gt 10 C over a period of at least 60 seconds 1 Check sensor position and wiring If necessary reset the electronic controller Replace the sensor if the error persists To replace the necessary parts you must contact your installation engineer E04 lock out error Error in dummy sensor The two dummy sensors in the tank detect a differential of gt 10 C over a period of at least 60 seconds 1 Check leads from dummy 1 and dummy 2 If necessary reset the electronic controller Replace the dummy sensor if the error persists To replace the necessary parts you must contact your installation engineer 1 Temperature sensor T4 is a 2 in 1 sensor T4 contains 2 NTCs for the high limit thermostat and safety thermostat protection 2 The dummy sensor flue gas sensor comprises dummy sensor flue gas sensor 1 and dummy sensor flue gas sensor 2 Instruction manual BFC 81 Ye EX Instruction manual BFC 82 EN 14 14 1 Introduction 14 2 Determining service interval Instruction manual BFC Maintenance frequency A service should be carried out at least once a year both on the water side
11. Diameter of air restrictor mm 23 0 23 0 28 0 29 0 Heating time AT 45 C minutes 22 35 24 19 Electrical power consumption W 275 275 275 275 Supply voltage volts 230 230 230 230 15 10 VAC Mains frequency Hz 1Hz 50 50 50 50 IP class 30 30 30 30 Instruction manual BFC 21 3 Installation Y 3 4 3 Gas data Gas data Description ll2y3 Gas category 2H G20 20 mbar Injector orifice diameter 1 Blank plate 2 Burner pressure regulator Nominal load gross calorific value Nominal output Supply pressure Burner pressure Gas consumption 9 General 3 Injector orifice diameter 1 Blank plate 2 Burner pressure regulator Gas category G30 30 mbar butane Nominal load gross calorific value Nominal output Supply pressure Burner pressure 1 Gas consumption 9 Gas category G31 37 mbar propane Nominal load gross calorific value kW Nominal output kW Supply pressure mbar 37 37 37 37 Burner pressure 1 mbar Gas consumption 9 kg h 2 1 2 2 3 6 4 2 Based on 1013 25 mbar and 15 C t If using a blank plate instead of a burner pressure regulator it is assumed that the burner pressure is equal to the supply pressure In practice however the burner pressure will be lower 22 Instruction manual BFC E 3 5 installa
12. Smith pursuant to the specified warranty do not extend beyond free delivery from the Veldhoven warehouse of the replacement sections parts or water heater respectively Shipping labour installation and any other costs associated with the replacement will not be accepted by A O Smith A claim on grounds of the specified warranty must be submitted to the dealer from whom the water heater was purchased or to another authorised dealer for A O Smith water Products Company products Inspection of the water heater as referred to in articles 1 and 2 shall take place in one of the laboratories of A O Smith water Products Company A O Smith grants no other warranty or guarantee over its water heaters nor the sections or parts of water heaters supplied for replacement other than the warranty expressly set out in this Certificate Under the terms of the supplied warranty A O Smith is not liable for damage to persons or property caused by sections or parts or the glass lined steel tank of a replacement water heater that it has supplied Instruction manual BFC EN 17 17 1 Introduction Instruction manual BFC Appendices This appendix contains e Electrical diagram e Week program card 91 17 17 2 Electrical diagram Appendices ye Y Electrical diagram
13. The figure and table give information about these appliance types For an explanation of the possibilities please contact the manufacturer Instruction manual BFC jor Y Types of appliances C43 Mi B23 C33 E4 Y a g A 1 l C13 C53 W 7 f HAKA m f ae ne gt IMD 0468 RO Instruction manual BFC 27 Type of appliance Installation ye py Explanation of type of appliance Description B23 Air for combustion is drawn from the boiler room C13 Concentric and or parallel wall flue terminal C33 Concentric and or parallel roof flue terminal C43 Appliances on common air supply and flue gas discharge concentric and or parallel in multi storey building C53 Air supply and flue terminal types mixed C63 28 3 9 3 Appliances supplied without flue components and or terminal These appliances must be installed in compliance with local regulations Note Make sure that the chimney discharges into a
14. C P The switching period has been deleted You will return now to the week program menu The cursor points to the first programmed period D A y ON 50 El no no INSERT DELETE START OPERATION 6 Scroll with Y to START OPERATION Confirm with ENTER The week program is active 11 10 Extra period Use an extra period when you either want to have the appliance switch on and off for a certain period either without modifying the active week program or without taking the appliance out of the OFF mode frost protection active If the appliance is running under an extra period then this is indicated in the display with the text EXTRA EXTEA l HG Hondas MO 11 13 Tset PERIOD ACTIVATED 63 1 1 Main menu If the water temperature becomes too low during the extra period 11 11 Programming an extra period the appliance will run through the heating cycle 9 3 The appliance s heating cycle and fall back into the extra period The same settings can be made for an extra period as for a week program 11 7 Changing the appliance s standard week program period 11 11 Programming an extra period 1 Call up the menu for entering an extra period via 2 GS ESTRA PERIOD Confirm with ENTER MEHL OM WEEE PROGRAM SEXTEA PERIOD The display show the settings for the extra period Setting the switch on time 1 Use and Y to set the day In the example this is SU Confirm with ENTER
15. CH OFF SA Zii THSERT DELETE START OPERATION Oe ied gh gL nu uun nu nn m Mu Pe mi p i ag Gp sgt Gp gtr ghia u A gh gl i 4 Example As an example we will set the switch on time for Sunday to 08 15 hours and the matching switch off time to 12 45 hours The water temperature will be set to 75 C and the pump will run continuously The following settings are entered one by one via the menu the switch on time the switch off time the desired water temperature and the mode of the program controlled pump 11 7 1 Week program setting the switch on time 1 Bring the cursor to SU Confirm with ENTER OH 50 BA OFF SU 23155 Tset 65 C PUMP OH SALE The day indicated by flashes 2 Use f and y to set the desired day In the example this is SLI Sunday Confirm with ENTER ON 5U BB B0 OFF SU 60 59 Tset 65 C PUMP OH SALE The cursor moves to the hour digits which flash 3 Use and y to set the hours In the example this is AS Instruction manual BFC Confirm with ENTER The cursor moves to the minute digits which flash Note Because the switch off time can never be earlier than the switch on time the switch off time setting is automatically adjusted with the switch on time 4 Use t and Y to set the minutes In the example this is 15 Confirm with ENTER The cursor moves to the switch off hour digits which flash ON OFF LL E dad ins co 00 oo nn
16. The cursor moves to the hour digits which flash SUFHE Be SU Gee a9 Cir START 2 Use ft and Y to set the switch on hour to the desired value In the example this is Hi Confirm with ENTER The cursor moves to the minute digits which flash OW OFF Tset FUMF Note Because the switch off time can never be earlier than the switch on time the switch off time setting is automatically adjusted with the switch on time 3 Use and Y to set the minutes In the example this is 13 Confirm with ENTER The cursor moves to the hour digits of the switch off period mot Al LL En co oo E Li feb pete cn CA iN r th cl 5 a Ea 64 AEX Setting the switch off time 1 Use and to set the hours In the example this is Biz Confirm with ENTER The cursor moves to the minute digits which flash z c mo gf if 2 Use and y to set the minutes In the example this is 5 Confirm with ENTER The cursor moves to the water temperature See the figure OFF Teet 65 0 PUMP OH START Setting the water temperature 1 Use and y to set the water temperature In the example this is 75 C Confirm with ENTER The cursor moves to FLINF OH OH OFF Tset PUMP 0H Setting the program controlled pump 1 If required a pump can be controlled during the period Use and Y to set FUMNF OH The pump ensures a regular circulation of hot water in
17. and on the gas side Maintenance frequency depends among other things on the water quality the average burning time per day and the set water temperature Note Regular maintenance extends the service life of the appliance To determine the correct maintenance frequency it is recommended to arrange for the service and maintenance engineer to check the appliance on both the water and gas side three months after installation Based on this check the best maintenance frequency can be determined To aid servicing the electronic controller has a service interval with which the service and maintenance engineer can determine the frequency of maintenance based on the number of burning hours The service interval can be set to 500 1000 or 1500 burning hours The standard setting is 500 burning hours Example In the first three months the appliance has burnt 300 hours During maintenance it is evident that one service per year will be sufficient Therefore after one year some 1200 burning hours will have elapsed The first value below 1200 hours that can be selected is 1000 burning hours In this case the service and maintenance engineer sets the interval to 1000 In the first three months the appliance has burned for 300 hours During maintenance it is evident perhaps due to the water quality that service will be required at least once every 6 months Therefore after six months some 600 burning hours will have elapsed The f
18. and or Y buttons to go to SETTINGS and confirm with ENTER 3 LAHGUAGE Use the 4 and or Y buttons to go to LANGUAGE 4 Confirm with ENTER After entering ENTER you will have activated the LAHGUAGE submenu 11 3 Switching on the ON mode You can switch the appliance to the H mode from any operational mode as follows 1 ce OH START OPERATION Confirm with ENTER Note First consult the chapter about switching on 9 Starting and running too 11 4 Setting the water temperature 11 41 Setting the water temperature via the SET POINT MENU The water temperature can be set to any value between 40 C and 80 C Set the water temperature via 1 c 0H CHANGE SETPOLHT Confirm with ENTER START OPERATION CHANGE SETPOINT Tset 65 C 2 Use to increase the value Y to decrease the value 59 1 1 Main menu Confirm with ENTER After confirming the appliance enters ONmode SETPOIHT Note If the preset temperature is higher than the current water temperature then the appliance might not immediately start the heating cycle To prevent excessively frequent switching on and off there is a heating margin The standard setting for this margin is 4 C The appliance starts heating when the water temperature is 4 C colder than the SETPOINT We refer to this margin as the hysteresis The service and maintenance engineer can adjust 12 2 Setting the hysteresis this setting 11 4 2 Setting
19. dada PRE PURGE 3 During the pre purge the pressure switch closes The icon Wis activated The message PRESSURE SWITCH appears 12 45 Thursday Ts ITE PRESSURE SIM 4 After some time the pre purge ceases and the electronic controller reduces the fan speed to the ignition speed This is followed by the pre glow of the hot surface igniter The icons l8l and A are dimmed The icon Eis activated HAO OH n 13 45 Thuresda BLOW FLUG 56 AEX 5 After a number of seconds pre glow the gas control is opened and ignition takes place The icon El is activated The message ISHITIOH appears Ed OH 13 43 T IGHITIOH 6 After ignition the flame is detected and the appliance will be running This means that actual heating has started The fan speed then increases to the normal working speed and the pressure switch closes The icon Bis dimmed The icons Y and B are activated The message FUMHTHE appears HaGSBUa OH La 13 45 Thur E RUHNAIHG 7 When the water is up to temperature the heat demand drops off and the post purge starts This lasts about 25 seconds The icons W E and 0 are dimmed The icon is activated The message FL elsa T PUEGE appears OH mos 13243 Thursday Tset POST PURGE 8 Following the post purge the fan stops and the pressure
20. detection Appliance operational 7 4 Electronic controller ON OFF switch The ON OFF switch of the electronic controller is used to switch the appliance ON and OFF Note that in the OFF position the appliance remains electrically live in order for the continuous pump to stay running INTERMAL CHECK After switching on the text THTERHAL CHECK appears on the display for about 10 seconds Themain menu 11 Main menu then appears If no selection is made in the main menu the appliance automatically switches to the OFF mode 8 2 Operating modes Note To electrically isolate the appliance you must use the isolator between the appliance and the mains power supply 7 5 Navigation buttons The use of these buttons is explained with the help of the figure that shows the main menu 11 Main menu The navigation buttons are 49 f The control panel Buttons for UP 4 and DOWN Enter ENTER Reset button RESET The arrows and indicate that you can scroll up and or down Use the buttons and Y to scroll AEX MEHU OFF 20H WEEE PROGRAM ESTEA PERIOD SETTINGS The cursor points to the option to be activated In the display as shown in the figure you can scroll through the main menu The main menu comprises OFF OM WEEK PROGRAM EsTRA FERIO and SETTINGS You have to scroll down further to see the options E TRA PERIOD and SETTINGS The selected option is confirmed us
21. efficiency Through the special design of the heat exchanger 11 the flue gases are first led downwards via the combustion chamber then upwards again via the heat exchanger then once more downwards beside the water in the tank In this process the flue gases gradually become cooler Because the cooled flue gases flow alongside the cold water lower down in the tank they start to condense This condensation causes latent heat energy to be released which is transferred to the cooler water thereby increasing the energy performance of the unit The condensate yielded by this process is discharged via the siphon 23 The insulation layer 24 prevents heat from escaping The inside of the tank is enamelled to protect against corrosion The anodes 9 provide extra protection against corrosion For use during maintenance the appliance has an inspection and cleaning opening 12 The water temperature is measured by temperature sensors T1 7 in the top of the tank 10 and T2 13 at the bottom of the tank These temperatures are sent to the electronic controller Based on these two observations the electronic controller calculates a net water temperature Thet The value of Thet lies between the temperatures at the top and bottom of the tank As soon aS Tnet falls below the set water temperature Tet the electronic controller registers a heat demand The gas control 16 is opened and the gas is mixed with air This mixture is ignited by
22. power to the appliance using the isolator on the appliance 6 Switch the electronic controller ON by setting the 0 l switch to position I AND IMD 0423 RO The display will now show IHTERHAL CHECK for about 10 seconds and go to the main menu THTERHAL CHECK MEHU 0FF On WEEK PROGRAM 7 Activate the ON mode by going through the following steps Press the blue arrow once to position the cursor in front of HH and press ENTER The display shown here will appear 35TART OPERATION CHANGE SETPOINT T Confirm the ENTERby pressing START OPERATION The appliance is now in the ON mode and will ignite 8 Once the display shows the text RUMHIHG amp you must wait about 1 minute before reading the dynamic pressures the fan needs this time to run up to full rotational speed Instruction manual BFC 37 38 3 11 3 3 11 4 Installation y He 9 Use the pressure gauge to read the supply pressure at 1nipple 1 3 4 3 Gas data Note Consult the mains gas supply company if the supply pressure is not correct 10 Use the pressure gauge to read the burner pressure at nipple 2 3 4 3 Gas data If the burner pressure is not correct and the appliance is fitted with a blank plate you will not be able to adjust the pressure Finalise 3 11 4 Finalising and in this case consult your installation engineer or supplier If the appliance is indeed fitted with a burner pressure regul
23. standard setting for the pump relay is OFF PUMP RELAY 20H OFF Ifthe mode WEEK PROGRAM or EXTEA PERIOD is active then the setting for mode WEEE PROGRAM or EXTRA PERIOD has priority over the ON OFF selection for the pump relay in the service menu Example One of the week program periods is currently active During this period the pump relay setting is OFF If the pump relay is set ON in the service menu the pump will nonetheless remain OFF The pump will only switch ON once the week program period has ended 68 EX 12 7 Setting the service interval To aid servicing the electronic controller includes a service interval which is used to set the frequency of maintenance interval 14 2 Determining service interval by the service and maintenance engineer based on the number of burning hours The service interval is based on the number of burning hours This can be set to 500 1000 and 1500 hours The standard setting for number of hours is 500 Once the preset number of hours is reached a message 8 4 Service condition to this effect will appear Adjust the service interval via e o SERVICE INTERVAL m INTERVAL E HOURS 12 8 Setting the display contrast Adjust the display contrast via CONTRAST DISPLAY The standard setting is 100 The range is from 0 through 100 The figure shows the related display COHTRAST DISPLAY gt 0 F 95 H 12 9 Setting the display backlight time Set
24. to stand in the water heater the warranty shall be reduced to one year from the original installation date The warranty set out in article 1 and 2 will apply solely under the following conditions a The water heater is installed under strict adherence to A O Smith installation instructions for the specific model and the relevant government and local authority installation and building codes rules and regulations in force at the time of installation b The water heater remains installed at the original site of installation c The appliance is exclusively used with drinking water which at all times can freely circulate a separately installed heat exchanger is mandatory for heating salt water or corrosive water d The tank is safeguarded against harmful scaling and lime buildup by means of periodic maintenance e The water temperatures in the heater do not exceed the maximum setting of the thermostats which form a part of the water heater f The water pressure and or heat load do not exceed the maximum values stated on the water heater rating plate g The water heater is installed in a non corrosive atmosphere or environment h The water heater is connected to a protected cold supply arrangement which is approved by the relevant authority with sufficient capacity for this purpose supplying a pressure no greater than the working pressure stated on the water heater and where applicable by a likewise approved temperat
25. water temperature during ON mode The water temperature can also be directly adjusted when the appliance is in the ON mode Simply use to increase the value to decrease the value Confirm with ENTER OH 11 5 Week program Using the week program you can set the water temperature for the days and times you want If the appliance is running under a week program this is indicated on the display by the FFG text on the first line see the figure The second line shows the time of day the day of the week and the temperature The third line shows the next switching time of the week program and the programmed temperature The fourth line shows the PROGRAM ACTIVATED text PROG Bri 35 Monday 64 C MO 43 60 Tset FS C PROGRAM ACTIVATED The appliance s default week program switches the appliance on every day at 00 00 and off at 23 59 The default water temperature setting is 65 C If you want you can change every setting in the appliance s standard week program If the water temperature becomes too low while the week program is running the appliance will run through the heating cycle 9 3 The appliance s heating cycle and return to the week program 60 AGA ES This following are discussed Starting and stopping the week program e Changing the appliance s standard week program e Adding times to a week program e Deleting times from a week program 11 6 Starting and stopping the week pr
26. 1 4 Setting the water temperature 9 3 The appliance s heating cycle The appliance s heating cycle is activated as soon as the measured water temperature Thet falls below the threshold value Tset This threshold value depends on the currently selected appliance operating mode For example if the appliance is in OFF mode frost protection then this value is 5 C If the appliance is in ON mode then this threshold value is selectable for example 65 C The heating cycle runs in turn through the following states HEAT DEMAND PRE PURGE PRESSURE SWITCH PRE GLOW IGNITION RUNNING POST PURGE The complete cycle is explained in the following example which assumes the appliance is in the basic mode H N Oa fF WN gt Note The same heating cycle applies to the other operating modes 55 9 Once the appliance starts it will run through the following steps Starting and running 1 The water temperature drops below the set temperature of for example amp 3 C The electronic controller detects a demand and starts the heating cycle The icon Mis activated The message HEAT GCEMAHE appears Heaeeaw OH u 13 45 Thursday Tse HEAT DEMAND 2 Once demand is registered the fan is started to exhaust any gases that may be present This phase is called pre purge and lasts about 15 seconds The icon is activated The message PRE FLFGE appears HeaeBaw OH ma 13 43 Thu
27. 1 7 2 Week program setting the switch off time 4 After changing all desired switch on and switch off times you can start running the week program Scroll with Y to START OPERATION Confirm with ENTER 11 8 Adding times to a week program Call up the menu to IHSEFRT switch on and switch off times into a week program as follows 1 ca WEEE PROGRAM PROGRAM QUERUTENM Confirm with ENTER WEEK PROGRA START OPERATION PROGRAM OVERVIEW r 62 AEX The display shows the menu for the week program The cursor points to the active period DAY TIME Tset OM 5U 63 15 s DELETE START OPERATION 2 Scroll Y to INSERT Confirm with ENTER The sub menu for adding a period will appear OM 21 02 13 OFF SU 12 45 Tset PSPC PUMP OH SAWE Example As an example we will program an extra period in which the switch on time is set to 18 00 hours and the corresponding switch off time to 22 00 hours The water temperature will be set to 75 C and the pump will run continuously DAY TIME Tset ON 511 15 06 E OFF SH DELETE START OPERATION 3 Proceed as follows a Setthe switch on time 11 7 1 Week program setting the switch on time b Setthe switch off time 11 7 2 Week program setting the switch off time c Set the water temperature 11 7 3 Week program setting the water temperature d Set the program controlled pump 11 7 4 Week program setting the program con
28. 2 packaging 17 PC connection 50 post purge 55 power cable 34 pre glow 55 pre purge 55 pressure switch 15 55 prog 52 protection 14 pump 68 push buttons 49 running 55 scale 87 0306 059 4 1 UK Index scrolling 49 service check 10 83 service engineer 10 service required 53 setting backlight time 68 setting date 65 setting display contrast 68 setting display scroll speed 68 setting service interval 68 softlite 15 specifications 20 starting up 55 supply pressure 36 symbol installation engineer 10 service engineer 10 user 10 target groups 10 temperature sensor T1 14 T2 14 ThermoControl 49 controls 49 ON OFF switch 49 Tnet 14 to descale 87 to shut down electrically isolating 57 longer period 57 short period 57 trademarks 3 user 10 warranty 89 exclusions 90 general 89 installation and conditions of use 89 scope 90 water composition 18 setting the temperature 59 week program 51 Instruction manual BFC
29. 375 Height of gas connection 1270 1800 1800 1800 Height of cold water supply 170 160 160 160 Height of hot water outlet 1405 1940 1940 1940 y position of hot water outlet 205 205 205 205 Height of cleaning opening 170 175 175 175 Height of drain valve connection 85 75 75 75 Height of T amp P valve connection 900 1410 1410 1410 Height of condensation drain 125 145 145 145 Cold water supply connection ext R1 R1 5 R117 R1 5 Hot water outlet ext R1 R1 R1 R1 Gas valve connection int Rp 4 Rp 4 Rp 4 Rp 4 Drain valve connection int ale i 3 4 e T amp P valve connection int 1 11 5 NPT 1 11 5 NPT 1 11 5 NPT 1 11 5 NPT Inspection cleaning opening 95x70 95x70 95x70 95x70 Soja s nj gt s o d v 3 4 2 Condensation drainage connection int 40 Rp1 General and electrical specifications General and electrical specifications Rp1 Rp1 DESCRIPTION Unit BFC 28 BFC 30 BFC 50 BFC 60 Volume litres 217 368 368 368 Empty weight kg 177 214 214 214 Maximum operating pressure bar 8 8 8 8 Number of anodes 4 4 4 4 Fan rotation speed at ignition rpm 4500 4500 4500 4500 Operational speed of fan rpm 5000 5400 6000 6660
30. 6 connecting hot water side 24 connecting isolating transformer 34 connecting Tank ON 35 connecting the program controlled pump 35 controls 59 conversion to a different gas category 39 dimensions 21 display 49 displaying error history 67 document contents 12 draining 45 electrical connection 32 electrical connector block 33 electrical diagram 92 environmental conditions 17 Instruction manual BFC error 52 extra period 51 operating mode 51 settings 64 fan 15 filling 43 flame probe 16 floor loading 18 forms of notation 11 frost protection 51 gas category conversion to different 39 gas connection 26 gas control 15 general specifications 3 general working principle 13 heat demand 55 heating cycle 14 55 humidity 18 hysteresis setting 67 icons pre glow 49 explanation 49 flame detection 49 gas control 49 heat demand 49 ignition 55 installation engineer 10 isolator 34 language setting 65 liability 3 mains power 34 maintenance burner 88 condensation water discharge 88 finalising 88 gas side 88 heat exchanger 88 orifice 88 perform 85 preparation 85 scale 87 to descale 87 water side 87 97 mode ERROR 52 EXTRA 51 HEAT DEMAND 55 IGNITION 55 OFF 51 ON 51 POST PURGE 55 PRE GLOW 55 PRE PURGE 55 PRESSURE SWITCH 55 PROG 52 RUNNING 55 SERVICE REQUIRED 53 navigation buttons 49 off 51 on 51 ON mode 59 on off switch 49 operating modes EXTRA 51 general 51 OFF 51 ON 51 PROG 5
31. F OH WEEE PROGRAM Attention Failure to wait until the fan stops purging can cause damage to the appliance Instruction manual BFC 4 Wait until the fan has stopped The symbol is then dimmed 5 Switch the appliance OFF position 0 using the ON OFF switch on the control panel O El 6 m CARD n EN IMD 0423 RO 6 Isolate the appliance from the power supply by setting the isolator between the appliance and the mains power supply to position 0 10 4 Shutting the appliance down for a long period Drain the appliance if you are shutting it down for a long period Proceed as follows 1 Isolate the appliance from the power supply 10 3 Electrically isolating the appliance 2 Shut off the gas supply Close the stop valve in the hot water pipe a Close the supply valve of the protected cold supply set up 5 Open the drain valve 6 Bleed the appliance or installation so that it drains completely 57 10 Shutting down AE Instruction manual BFC AEX 11 Main 11 1 Introduction The EHL is reached by pressing the a button on the electronic controller MENU 0FF OH WEEE PEOGRAN EXTRA PERIOD SETTINGS The main menu comprises OFF Select this option if you wish to turn off 10 Shutting down the appliance for a brief period but do not wish to drain it In this mode the frost protection is active This prevents water from freezi
32. Installation User and Service Manual AO SMITH WATER PRODUCTS COMPANY A DIVISION OF A SMITH CORPORATION PS www aosmithinternational com your installer GA ES Read this manual carefully Trademarks Liability More information Instruction manual BFC Y Warning Read this manual carefully before starting up the water heater Failure to read this manual and to follow the instructions in this manual may lead to accidents personal injury and damage to the appliance Copyright O 2008 A O Smith water Products Company All rights reserved Nothing from this publication may be copied reproduced and or published by means of printing photocopying or by whatsoever means without the prior written approval of A O Smith water Products Company A O Smith water Products Company reserves the right to modify specifications stated in this manual Any brand names mentioned in this manual are registered trademarks of their respective owners A O Smith water Products Company accepts no liability for claims from third parties arising from improper use other than that stated in this manual and in accordance with the General Conditions registered at the Eindhoven Chamber of Commerce Refer further to the General Conditions These are available on request free of charge Although considerable care has been taken to ensure a correct and suitably comprehensive description of all relevant components the manual ma
33. Instruction manual BFC line four blank when the appliance is idle or depending on the heating cycle 9 3 The appliance s heating cycle displays a text such as HEAT DEMAND OH 12 45 Thursda Ts A et 8 2 3 Es TRA In this mode one extra period is programmed and activated In this mode the FF orFFOG mode is temporarily overruled to fulfil a single period of demand Once the period has passed the appliance automatically returns to the previous operating mode The figure shows the display with the following information line one the text EXTRA line two the time the day and alternately 9 3 The appliance s heating cycle T4 and T et line three the switch on time and the related water temperature setting line four the text FERTOD ACTIVATED ESTEA 12 38 Thursday F6 C TH 12 45 Teet 75 C FERIOD ACTIVATED 51 8 Status of the appliance 8 2 4 PROG In this mode a preset week program is active and the appliance responds continually to demand within the time periods set in the week program There are two distinct situations possible in this mode FROG 16 66 Monday Mo 11 13 Tset Y 1 The current time falls within a set time period of the week program The figure shows the display with the following information line one the text FROG line two the time the day and T4 and Thet alternately 9 3 The appliance s heating cycle line three the next schedule
34. Instruction manual BFC Introduction This manual describes how to install service and use the BFC appliance The BFC appliance is a condensing water heater with a fan in the air intake The BFC can be installed as either an open or room sealed appliance A concentric chimney connector is fitted standard to the appliance Alternatively the appliance can be connected using a parallel system The alternative installation types are B23 C13 C33 C43 C53 and C63 The information in this manual applies to the BFC 28 BFC 30 BFC 50 and BFC 60 The appliance has been manufactured and equipped in accordance with the European standard for gas fired storage water heaters for the production of domestic hot water EN 89 The appliances are therefore compliant with the European Directive for Gas Appliances and and are entitled to bear the CE mark Y Warning Read this manual carefully before starting up the water heater Failure to read the manual and to follow the printed instructions may lead to personal injury and damage to the appliance Y Warning If there is a gas smell No naked flames No smoking Avoid causing sparks Do not use any electrical equipment or switch e no telephones plugs or bells Open windows and doors Shut off the mains gas supply valve Warn occupants and leave the building After leaving the building alert the gas distribution company or your installation engineer As the end user installatio
35. Instruction manual BFC TERMINAL BLOCK CONNECTIONS Earth N Neutral L1 Phase input of controller L2 Phase input of isolating transformer primary side L3 Phase output of isolating transformer secondary side L4 Phase input of program controlled pump E Phase input of continuous pump COMPONENTS A Controller B Flame probe C Hot surface igniter D Gas control E Burner earth connection F Extra ON mode switch G Continuous pump H Program controlled pump J Extra error signal connection K Isolating transformer L Double pole isolator M Controller 0 l switch N Display O Fan P Temperature sensor T2 bottom of tank Q Dummy R Temperature sensor T1 top of tank S Selection resistor T Pressure switch CONTROLLER CONNECTIONS J2 Power connection for controller J19 Extra error signal connection J20 Gas control connection J21 Program controlled pump connection J24 Fan connection J36 Controller display connection JP2 Flame probe and hot surface igniter connection JP3 Temperature sensor T2 connection JP4 Dummy connection JP5 Temperature sensor T1 connection JP6 Selection resistor and pressure switch connection JP8 Extra ON mode switch connection F1 Fuse F3 Fuse 93 94 17 Appendices JA Instruction manual BFC 17 3 Week program card You can cut the week program card out and keep it near the appliance Period Pump Period Pump Ci CH OH OFF 12 SFE a OFF 0H
36. OFF aH OH 0H OFF 13 EE OFF 0H OFF GH GH _ a OM OFF 14 OFF OFF 0H OFF Ci GH ON OFF 15 OFF a OFF 0H OFF aH aH 0H OFF 16 OFF nee IFE 0H OFF aH aH 0H OFF 17 OFF uate Are 0H OFF On OH OM OFF 18 OFF a AEE 0H OFF Ci GH ON OFF 19 OFF be SEE 0H OFF CH CH 0H OFF 20 OFF Es FE 0H OFF CH aH be ON OFF OFF OFF OH OFF ON OFF Example Pump 0H OFF Instruction manual BFC 0H OFF 95 Instruction manual BFC 96 AGA ES Index A ambient temperature 18 appliance displaying history 68 displaying selection 68 displaying specifications 66 general working principle 13 heating cycle 14 protection 14 types 9 17 B burner pressure 36 Cc claims 90 connect 24 25 air supply 26 Alarm OUT 35 circulation piping 24 25 cold water side 24 25 condensation drainage 24 25 continuous pump 35 electrical 32 flue gas discharge 26 gas 26 hot water side 24 isolating transformer 34 program controlled pump 35 Tank ON 35 Connect Alarm OUT 35 connecting air supply 26 connecting circulation pipe 24 25 connecting cold water side 24 25 connecting condensation drainage 24 25 connecting continuous pump 35 connecting flue gas discharge 2
37. acking The appliance is suitable for either open or room sealed combustion If installed as a room sealed appliance then the availability of the necessary external air supply will depend on the place of installation In this event there are no additional ventilation requirements If the appliance is to be installed as an open system then it will be subject to the guidelines and ventilation regulations that are in force locally The alternative installation types are B23 C13 C33 C43 C53 and C63 Attention The appliance may not be used in rooms where chemical substances are stored or used due to the risk of explosion and or corrosion of the appliance Some propellants bleaching agents degreasing agents etc disperse vapours which are explosive and or which cause accelerated corrosion If the appliance is used in a room in which such substances are present the warranty will be void 17 18 3 3 1 3 3 2 3 3 3 3 3 4 Installation ye py Air humidity and ambient temperature The boiler room must be frost free or be protected against frost The table shows the environmental conditions that must be adhered to for correct functioning of the electronics present in the appliance to be guaranteed Air humidity and ambient temperature specifications Air humidity and ambient temperature Air humidity max 93 RV at 25 C Ambient temperature Functional 0 lt T lt 60 C Appliance maximum floor load I
38. allation of air for example by opening all draw off points 7 The appliance is now under water supply pressure There should be no water coming out of the T amp P valve 3 If this does happen the T amp P valve might be defective or incorrectly fitted Instruction manual BFC AEX 6 Draining Installation diagram Legend UNVENTED RE Only applicable numbers are mentioned 1 pressure reducing valve mandatory 3 T amp P valve mandatory 4 stop valve recommended in pipe C and mandatory in pipe A 5 non return valve mandatory 6 circulation pump optional 9 drain valve 10 manual gas valve mandatory 11 service stop valve 12 temperature gauge optional 13 condensation drainage 14 hot water draw off points 15 expansion valve mandatory 16 expansion vessel mandatory 17 3 way aeration valve recommended 18 water tank 19 float valve A cold water supply hot water supply circulation pipe gas supply overflow pipe overflow pipe VENTED IMOOw IMD 0464 RO Instruction manual BFC 45 6 1 6 2 46 6 Draining unvented installations Draining vented installations ae ADS 1 Activate the MEM with es MENU gt 0FF ON WEEK PROGRAM 2 3 4 Position the cursor in front of AFF Confirm OFF with ENTER Wait until the fan has stopped The symbol Sis then dimmed Attention Failure to wait until the
39. and flame probe to the controller 13 Fit the 3 part gas coupling 2 14 Check the burner pressure and supply pressure 3 11 Checking the supply pressure and burner pressure 15 Replace the cover 16 Remove the sticker showing the new gas category from the conversion kit and attach it below the appliance s rating plate This clearly indicates that the appliance may no longer be run on the gas for which it was originally supplied 41 42 Conversion to a different gas category ES Instruction manual BFC AJOS 5 Filling Installation diagram Legend UNVENTED RE Only applicable numbers are mentioned 1 pressure reducing valve mandatory 3 T amp P valve mandatory 4 stop valve recommended in pipe C and mandatory in pipe A 5 non return valve mandatory 6 circulation pump optional 9 drain valve 10 manual gas valve mandatory 11 service stop valve 12 temperature gauge optional 13 condensation drainage 14 hot water draw off points 15 expansion valve mandatory 16 expansion vessel mandatory 17 3 way aeration valve recommended 18 water tank 19 float valve A cold water supply hot water supply circulation pipe gas supply overflow pipe overflow pipe VENTED IMOOw IMD 0464 RO Instruction manual BFC 43 5 1 44 5 Filling the appliance 5 1 1 is AROS Filling unvented installations To fil
40. ation The figure shows a cut away view of the appliance Cut away view of the appliance 12 inspection and cleaning opening O 13 temperature sensor T gt 14 cold water inlet 15 drain valve 16 gas control 17 burner 18 fan 19 air supply hose 20 hot surface igniter 21 flame probe 22 chimney pipe 23 siphon 24 insulation layer Instruction manual BFC i i IMD 0070 R1 13 2 3 2 4 14 The appliance s heating cycle Protection for the appliance 2 4 1 Working principle of the appliance EA ial X In this appliance the cold water enters the bottom of the tank via the cold water inlet 14 Once heated by the combustion chamber 8 and heat exchanger 11 the hot tapwater leaves the tank through the hot water outlet 2 Once the appliance is completely filled with water it remains constantly under water supply pressure As hot water is drawn from the appliance it is immediately replenished with cold water The air required for combustion is forced into the burner 17 by the fan 18 The gas is fed to the burner via the gas valve 16 Thanks to the modulated supply of gas and air the optimum gas air mixture is always achieved The special construction of the burner causes the mixture to form a vortex the cyclone effect before it becomes ignited This vorticity improves the ignition on the hot surface igniter 20 as well as ensuring optimum combustion
41. ator the pressure can be adjusted as described in the procedure 3 11 3 Adjusting the pressure Adjusting the pressure 1 Remove the cap 4 from the burner pressure regulator 3 2 Correct the burner pressure by turning the adjusting screw 5 depending on the correction required Adjustment screw anticlockwise burner pressure decreases Adjustment screw clockwise burner pressure increases 3 Cover the opening of the adjusting screw and check the burner pressure against the value given in the gas table 3 4 3 Gas data 4 If the pressure is not set correctly repeat the preceding steps until the correct pressure is attained Fit the cap 4 back on the burner pressure regulator 6 Activate the OFF mode of the electronic controller MENU gt 0FF gt jH WEEE PROGRAM 7 Ifthe MEHU is not displayed press E2 Use and to place the cursor beside OFF Confirm with ENTER 8 Wait until the fan has stopped and switch the electronic controller off Attention Failure to wait until the fan stops can cause damage to the appliance 9 Finish off 3 11 4 Finalising Finalising 1 Shut off the gas supply 2 Disconnect the two pressure gauges and retighten the sealing screws in the test nipples 3 Replace the cover y Note Before starting up the appliance take time to fill in the warranty card supplied with the appliance This enables us to guarantee the quality of our systems and to
42. ce Note The trip point of the pressure switch is not adjustable Pressure switch trip points Appliance Closing pressure differential gt 635 Pa Opening pressure differential lt 605 Pa gt 855 Pa lt 825 Pa gt 885 Pa lt 855 Pa gt 1085 Pa lt 1055 Pa 15 2 5 16 2 4 6 Safety of the instal lation 2 5 1 2 5 2 2 5 3 Working principle of the appliance EA ME X Flame probe To ensure that no gas can flow when there is no combustion the water heater is fitted with a flame probe 21 The electronic controller uses this probe to detect the presence of a flame by means of ionisation detection The electronic controller closes the gas control the instant it detects that there is a gas flow but no flame In addition to the appliance s standard built in safety monitoring the appliance must also be protected by an expansion vessel expansion valve pressure reducing valve non return valve and a T amp P valve The use of an expansion vessel expansion valve and or pressure reducing valve depends on the type of installation unvented or vented Unvented installation With an unvented installation an expansion valve valve and expansion vessel prevent the buildup of excessive pressure in the tank This prevents damage being caused to the enamelled coating in the appliance or to the tank A non return valve prevents excessive pressure buildup in the water supply sy
43. ck the settings If the settings are correct then replace the fan Modify the settings if incorrect Reset appliance controller See the BFC electrical diagram 17 Appendices To replace the necessary parts you must contact your installation engineer 74 EX Code Description Solution Air pressure switch fails Air pressure switch Check the wiring between the air pressure switch and the to close during pre leads controller Rectify any defect purge if any wires are damaged replace the wiring harness properly connect loose or detached hoses Reset appliance controller Loose air pressure Check hoses between air pressure switch and burner fan switch hoses Rectify any defect if any wires are damaged replace the wiring harness properly connect loose or detached hoses Reset appliance controller Heat exchanger and or 3 Measure the pressure differential across the air pressure switch id MUE 1S Hae hee Check the values 2 4 5 Pressure switch Check heat exchanger condensation drainage and or chimney flue for blockages Clear any blockage that may be present Reset appliance controller Defective controller Check that the controller is receiving power Check that the controller is correctly connected If there is no electrical power check the power supply to the terminal block or replace the controller Rectify any incorrect connections Reset appliance controller
44. cription F04 lock out error Three unsuccessful ignition attempts Solution 1 Open the main gas valve and or the manual gas valve supplying the water heater 2 Check the supply pressure to the gas control 3 If necessary repair the gas supply Y Y To repair the gas supply contact your installation engineer Air in the gas pipes Bleed the air out of the gas pipe No burner pressure Check the burner pressure to the gas control Check that the gas valve s open and shut correctly If necessary replace the gas control See Checking the supply pressure and burner pressure for how to bleed air from the gas line and measure the supply pressure and burner pressure To replace the necessary parts you must contact your installation engineer Defect in the hot surface igniter circuit Check that the hot surface igniter is correctly connected JP2 Check the wiring of the hot surface igniter 1 2 3 1 2 3 Measure the resistance across the hot surface igniter This must lie between 2 and 5 ohms Check that the hot surface igniter lights up during ignition If necessary replace the hot surface igniter Defect in the ionisation circuit Check that the flame probe is correctly connected JP2 Check the wiring of the flame probe Measure the ionisation current This must be at least 1 5 microamps 4 Replace the wiring if necessary Supply voltage too low Check the suppl
45. d the Lock out errors are then displayed The figure shows an example of Blocking errors In this case the text HISTORY OF ERRORS is followed by Ete HISTORY OF ERRORS B2 564 SENSOR ERROR Fee IOHIZATIOH COZ 36 HZ ERROR The figure shows an example of Lock out errors In this case the text HISTORY OF ERRORS is followed by La HISTORY OF ERRORSCLA Faz FAH Fay FLAME ERROR Fon Note For an overview of all errors and the possible causes please refer to the relevant chapter 13 Troubleshooting 67 12 12 4 Displaying the appliance history The appliance history submenu is used to display the burning hours the number of ignitions the number of flame errors and the number of ignition errors Service program Call up the menu for displaying the appliance history as follows S APPLIAHCE HISTORY The figure shows an example APPLIANCE HISTORY BURHIMGHOURS 060416 IGMITIOHS Ae n pag FLAME ERRORS IGHIT ERROR 12 5 Display the selected appliance Call up the menu for displaying the appliance selection as follows SELECT APPLIANCE The appliance number can be found on the rating plate The appliance selection has been correctly preset in the factory SELECT APPLIAHCE 5984 12 6 Switching the pump on or off If a program controlled pump is installed 3 10 6 Connecting a program controlled pump it can be switched ON or OFF as follows o PUMP RELAY The
46. d switch off time and the water temperature T set of the active period line four is empty or depending on the heating cycle 9 3 The appliance s heating cycle a text such as HEAT DEMAND PROG 12 88 Monde re HO 11 13 PERIOD ACTIVATED 2 The current time falls outside a set time period of the week program The figure shows the display with the following information line one the text FEDD line two the time the day and T4 and Thet alternately 9 3 The appliance s heating cycle line three the next scheduled switch on time line four displays the text FERIO ACTIVATED In all modes the temperature may at any moment drop below the desired temperature The appliance then enters a heating cycle This heating cycle is identical 9 3 The appliance s heating cycle for all basic operating modes Note Setting and if necessary programming of the basic operating modes are described in the main menu 11 Main menu chapter 52 AEX 8 3 Error conditions The figure shows an example of an error condition If the appliance enters this condition the display will show the following information line one error code comprising a letter and two digits followed by the error description e lines two to four alternately a brief explanation of the error and a brief action to resolve the error 504 SEHSOR ERROR CHECK SENSOR OF DUMMY Attention The displayed action to resol
47. dic cleaning and descaling prevents buildup of these deposits This increases the service life of the appliance and also improves the heating process Take the rate of scale formation into account when deciding on maintenance frequency Scale formation depends on the local water composition the water consumption and the water temperature setting A water temperature setting of maximum 60 C is recommended for prevention of excessive scale buildup To guarantee a good watertight seal around the cleaning opening replace the gasket washers bolts and if necessary the lid with new parts before reassembly see the figure A special set is obtainable from the supplier manufacturer To simplify descaling and cleaning of the tank the appliance is equipped with two cleaning openings IMD 0080 R1 1 Remove the cover plate 1 on the outer jacket see the figure 2 Undo the bolts 3 Remove the cover and the gasket 87 15 15 3 4 15 4 Gas side mainte nance 15 4 1 15 4 2 15 4 3 15 4 4 15 5 Finalizing mainte 88 nance Performing maintenance 4 Inspect the tank and remove the loose scale deposits and contamination 5 Ifthe scale cannot be removed by hand then the appliance will need to be descaled using a descaling agent Contact the supplier for advice on the preferred descaling agent 6 Close the cleaning opening To avoid damage to the tank tighten the bolts that fasten the lid with a torque n
48. e or after conversion you must always check the supply pressure and burner pressure Note The easiest way to check the gas pressures is by using two pressure gauges This procedure assumes that these two gauges are available Gas control Legend Only applicable numbers are mentioned 1 supply pressure test nipple burner pressure test nipple burner pressure regulator burner pressure control cap burner pressure control adjusting screw ak wn IMD 0079a R2 3 11 1 Preparation To check the supply pressure and burner pressure proceed as follows 1 Isolate 10 3 Electrically isolating the appliance the water heater from the power supply 2 Undo the screws of the plastic covers 3 Carefully remove the covers from the top of the appliance The electrical section is now visible 36 Instruction manual BFC El 3 11 2 Procedure to check pressures 1 There are two test nipples on the gas control a supply pressure nipple 1 a burner pressure nipple 2 Sealing screws are located inside the test nipples Loosen both sealing screws by a few turns Do not completely loosen them they can be difficult to re tighten 2 Connect a pressure gauge to the burner pressure nipple 2 3 Open the gas supply and vent the gas supply line with the supply pressure nipple 1 4 Connecta pressure gauge to the supply pressure nipple 1 when gas starts to flow from this nipple 5 Switch on the
49. ections to make Fit the cap on the electrical terminal block Fit the plastic covers onto the appliance 3 10 4 Isolating transformer An isolating transformer should be used if there is a case of floating neutral 1 Refer to fitting instructions provided with the isolating transformer Contact the supplier for details of the correct isolating transformer 2 Connect phase L neutral N and earth to terminals 16 through 21 of the terminal block as stated in the table 3 10 2 Preparation 3 Fit the cables in the strain relief 34 Instruction manual BFC EJA 4 Ifyou have no more connections to make Fit the cap on the electrical terminal block Fit the plastic covers onto the appliance 5 Connect the power cable to the isolator 3 10 5 Connecting continuous pump 1 Connect phase L neutral N and earth to terminals 7 8 and 9 as stated in the table 3 10 2 Preparation Fit the cable in the strain relief 3 If you have no more connections to make Fit the cap on the electrical terminal block Fit the plastic covers onto the appliance 3 10 6 Connecting a program controlled pump 1 Connect phase L neutral N and earth to terminals 10 11 and 12 as stated in the table 3 10 2 Preparation Fit the cable in the strain relief If you have no more connections to make Fit the cap on the electrical terminal block Fit the plastic covers onto the appliance 3 10 7 Connec
50. ed terminal exclusively of a type approved for the appliance Use of an incorrect roof or wall mounted flue terminal can cause the installation to malfunction 29 Installation ES Concentric wall flue terminal specifications C13 Specification Description Wall flue terminal set 1X Wall flue terminal incl wall flange Art No BFC 28 BFC 30 50 60 0302 515 1 0302 504 1 amp clamping ring Construction Concentric 1X Pipe 500mm 1X Bend 90 Manufacturer Muelink amp Grol Model M2000 MDV SEC Pipe material Construction Concentric Flue Thick walled aluminium with lip ring seal Air supply Thin walled galvanised sheet steel Pipe diameters Flue BFC 28 80 mm BFC 30 50 60 100 mm Air supply BFC 28 Y 125 mm BFC 30 50 60 150 mm 1 No other wall flue terminal is permitted Use this item number to order the wall conduit set from supplier manufacturer or wholesaler Concentric roof flue terminal specifications C33 Specification Description Roof flue terminal set e 1X Wall flue terminal incl clamping Art No 0305 042 1 0304 423 1 BFC 28 BFC 30 50 60 ring Construction Concentric 1X Pipe 1000mm 1 X Mounting flange Manufacturer Muelink amp Grol Model M2000 DDV HR C Pipe material Construction Concentric Flue Thick walled aluminium with lip ring seal
51. every 90 and 45 bend to this 35 metres in both the air supply and flue gas outlet The following practical example illustrates how to use the table Practical example of parallel flue gas outlet Example The diagram shows a BFC 30 This has to be fitted with a 25m parallel pipe 100mm in diameter plus eight 90 degree bends The configuration must be checked for compliance with the requirements stated in the table Instruction manual BFC 31 3 10 Electrical connection 32 3 10 1 Installation y pe Appliance with parallel flue gas discharge material IMD 0283 R1 The longest pipe must be used to check the maximum length In this case the chimney pipe is the longest This is 25 metres This 25 metres is the sum of pipe sections 1 2 3 4 and 5 The length of the transition piece can be ignored The total number of bends used in the flue gas outlet and air supply is 8 The bend in the transition piece can be ignored According to the table 4 6 metres must be added for each bend This brings the total pipe length to 4 6 x 8 25 36 8 25 61 8m This is less than the maximum length of 80 metres stated in the table The installation therefore fulfils the requirements Y Warning The installation should be carried out by an authorised installation engineer in compliance with general and local regulations 1 3 Regulations Introduction Topics covered in this paragraph in sequence e Preparation e Connectin
52. ewater pipe to the siphon 13 for condensation drainage and connect this to the wastewater discharge in the boiler room Attention All fittings behind the siphon must be condensation resistant 25 3 3 8 Gas connection 3 9 Air supply and flue 3 9 1 3 9 2 26 Installation ye py Y Warning The installation should be carried out by an authorised installation engineer in compliance with general and local regulations 1 3 Regulations Attention Make sure that the diameter and length of the gas supply pipe are large enough to supply sufficient capacity to the appliance See D in the installation diagram 3 5 Installation diagram 1 Fita manual gas valve 10 in the gas supply pipe 2 Blow the gas pipe clean before use 3 Close the manual gas valve 4 Fitthe gas supply pipe to the gas control Y Warning After fitting check for leaks Introduction This section covers the following subjects e Requirements for flue gas discharge materials e Concentric connections e Parallel connections Requirements for flue gas discharge materials Y Warning The installation should be carried out by an authorised installation engineer in compliance with general and local regulations 1 3 Regulations Depending on the approved installation types there are several alternatives for connecting the air supply and flue gas discharge The appliances are approved for installation types B23 C13 C33 C43 C53 and C63
53. f the error persists consult your installation engineer Hot water supply is used up Reduce hot water consumption and give the appliance time to heat up The controller is in OFF mode Switch the controller to the ON mode 11 3 Switching on the ON mode Temperature Tse is set too low Instruction manual BFC Adjust 11 4 Setting the water temperature temperature Te to a higher value If there continues to be insufficient hot water or none at all consult your installation engineer 71 13 3 Troubleshooting table for displayed errors Displayed errors Code Description S01 blocking error Open circuit from temperature sensor T2 at bottom of the tank Sensoris not correctly connected Solution Connect the sensor lead to JP3 Remark See the BFC electrical diagram 17 Appendices Damaged cable or defective sensor Replace the sensor To replace the necessary parts you must contact your installation engineer S02 blocking error Open circuitin sensor 1 of temperature sensor T4 at the top of the tank Sensor is not correctly connected Connect the sensor lead to JP5 See the BFC electrical diagram 17 Appendices Damaged cable or defective sensor Replace sensor T4 To replace the necessary parts you must contact your installation engineer 03 blocking error Open circuitin sensor 2 of temperature sensor T1 at the top of t
54. fan stops purging can cause damage to the appliance 5 Switch the appliance OFF position 0 using the ON OFF switch on the control panel TT THERMO IMD 0423 RO Isolate the water heater from the power supply by putting the isolator between the appliance and the mains power supply to position 0 Shut off the gas supply 10 Close the stop valve 11 in the hot water pipe Close the supply valve 4 in the cold water supply A 10 Open the drain valve 9 11 Bleed the appliance or installation so that it drains completely 1 Activate the HEHU with Ea 2 Position the cursor in front of OFF 3 Confirm OFF with ENTER 4 Wait until the fan has stopped The symbol is then dimmed Attention Failure to wait until the fan stops purging can cause damage to the appliance 5 Switch the appliance OFF position 0 using the ON OFF switch on the control panel Instruction manual BFC AOS Instruction manual BFC 8 9 THERMO a IMD 0423 RO Isolate the water heater from the power supply by putting the isolator between the appliance and the mains power supply to position 0 Shut off the gas supply 10 Close the stop valve 11 in the hot water pipe Close the stop valve 4 between the water tank and the cold water inlet A 10 Open the drain valve 9 11 Bleed the appliance or installation so that it drains completely 47 rainin AGA DS Instruction manual BFC
55. further enhance our warranty procedure Please return this card as soon as possible Your customer will then receive a warranty certificate with our warranty conditions Instruction manual BFC VEX Legend connector gas coupling air supply hose pressure switch hose gas air distribution plate stamped figures Oo BO NS Instruction manual BFC Conversion to a different gas category Attention The conversion may only by carried out by an authorised installation engineer If the appliance must operate on a family of gases LP gas or natural gas or other gas category than that for which the appliance has been set at the factory the appliance will have be adapted using a special conversion kit Attention You must check the supply pressure and burner pressure once the conversion is complete Orifice assembly IMD 0078 R3 39 Legend 7 burner pressure regulator 8 blank plate 9 gas control connector 40 Conversion to a different gas category or NS EJA Isolate the water heater from the power supply 10 3 Electrically isolating the appliance Shut off the gas supply Undo the screws of the plastic covers Carefully remove the covers from the top of the appliance Detach the connector 1 that connects the leads of the hot surface igniter and the flame probe to the controller Detach the three part gas coupling 2 adjacent to the burner Detach the air supply hose 3 Detach the pressu
56. g the appliance be aware that any leakage from the tank and or connections can cause damage to the immediate environment or floors below the level of the boiler room If this is the case the appliance should be installed above a wastewater drain or in a suitable metal leak tray The leak tray must have an appropriate wastewater drain and must be at least 5cm deep with a length and width at least 5cm greater than the diameter of the appliance Working clearances aa IMD 0228 R1 19 3 3 4 Technical specifica tions 3 4 1 Legend See the table 20 Installation ye 4 The appliance is supplied without accessories Check the dimensions 3 4 1 Dimensions of the appliance gas data 3 4 3 Gas data and other specifications 3 4 2 General and electrical specifications of any accessories you plan to use Dimensions of the appliance Plan and elevation of the appliance IMD 0073 R5 Instruction manual BFC Dimensions all sizes in mm unless otherwise stated Description BFC 28 BFC 30 BFC 50 BFC 60 Total height 1390 1910 1910 1910 Diameter of the appliance 705 705 705 705 Flue gas outlet diameter 80 125 100 150 100 150 100 150 Height of flue air supply 1365 1905 1905 1905 x position of flue 265 265 265 265 y position of flue 375 375 375
57. g the mains voltage Instruction manual BFC VEX Optionally itis possible to connect an isolating transformer a continuous pump a program controlled pump an extra ON mode switch and an extra alarm signal to the appliance For these options see e Isolating transformer e Connecting continuous pump Connecting a program controlled pump e Connecting an extra ON mode switch Tank ON Note The optional components are not included in the rating for electrical power consumption stated in the table 3 4 2 General and electrical specifications 3 10 2 Preparation Attention The appliance is phase sensitive It is absolutely essential to connect the mains phase L to the phase of the appliance and the mains neutral N to the neutral of the appliance Attention There may be no potential difference between neutral N and earth If this is the case then an isolating transformer must be applied in the supply circuit 3 10 4 Isolating transformer For more information or to order this isolating transformer please contact A O Smith water Products Company The figure shows a view of the electrical connector block and the table shows the appropriate connections Connector block Legend A screws B protective cap C connector block IMD 0077 R2 Instruction manual BFC 33 3 Installation We In preparation you must first remove the two plastic covers and the protective cap of the electrical sect
58. he language is set Instruction manual BFC 11 12 2 Setting day and time To enter the time and day MEHL WEEK FROGRAM EXTRA PERIOD SETTIHGS 1 Call up the menu for entering the day and time as follows 2 ca SETTINGS Confirm with ENTER The display shows the menu for settings 3 Scroll with 4 and Y to GAY TIME Confirm with ENTER SETTINGS LAHGUAGE 2DAY TIME SPECIFICATIONS The display shows the sub menu for adjusting the day DAY Sundaa Monday Tueedau ledmesday Thurzdaa Friday Satburda a 4 The cursor is positioned beside Sunda Scroll with and Y to the desired day Confirm with ENTER The day has been set The display shows the sub menu for adjusting the time 5 The cursor moves to the hour digits which flash Scroll with and Y to the current hour for example 15 Confirm with ENTER 6 The cursor moves to the minute digits which flash Scroll with and Y to the next minute for example 45 65 11 Confirm the minute setting with ENTER Main menu The time has been set Note The appliance takes no account of daylight saving 11 12 3 Displaying appliance specifications Note This category is solely intended for the installation engineer and or service and maintenance engineer The table shows the correct settings Ignition fan speed rpm Working speed of fan rpm Regulation interval C Ig
59. he tank 1 Sensor is not correctly connected Connect the sensor lead to JP5 See the BFC electrical diagram 17 Appendices Damaged cable or defective sensor Replace sensor T4 To replace the necessary parts you must contact your installation engineer 04 blocking error Open circuit from dummy 1 Dummy is not correctly connected Connect the dummy sensor dummy sensor 1 and 2 leads to JP4 See the BFC electrical diagram 17 Appendices Defective dummy Replace the dummy sensor To replace the necessary parts you must contact your installation engineer 05 blocking error Open circuit from dummy 2 Dummy is not correctly connected Connect the dummy sensor dummy sensor 1 and 2 leads to JP4 See the BFC electrical diagram 17 Appendices Defective dummy Replace the dummy sensor To replace the necessary parts you must contact your installation engineer 11 blocking error Short circuit in the temp sensor T2 at the bottom of the tank Short circuit in sensor circuit Instruction manual BFC Replace sensor T2 To replace the necessary parts you must contact your installation engineer 72 Code Description S12 blocking error Short circuit in sensor 1 of temperature sensor T at the top of the tank Short circuit in sensor circuit Solution Replace sensor T4 Y De To replace the necessary parts you must c
60. ing ENTER Pressing the RESET button takes you back one page in a menu and discards all options selected in the current menu Note The RESET button is also used to reset the appliance following an error 7 6 PC connection The PC connection is solely intended to enable technicians from A O Smith to display the status and history of the appliance These details can be important for troubleshooting and or responding to complaints 50 Instruction manual BFC AEJK 8 Status of the appliance 8 1 Introduction Topics covered in this chapter e Operating modes Error conditions e Service condition 8 2 Operating modes When running the appliance has four basic operating modes namely OFF OH ERTRA FROG 8 2 1 OFF In this mode the frost protection is activated The figure shows the display with the following information e line one the text OFF line two the time the day and alternately 9 3 The appliance s heating cycle T4 and Thet lines three and four the text FROST PROTECTION ACTIUATED OFF 12 45 Thursday 6 7C FROST PROTECTION ACTIVATED 8 2 2 oH In this mode the appliance continually responds to the hot water demand The figure shows the display with the following information line one the text OH line two the time the day and alternately 9 3 The appliance s heating cycle T4 and Thet line three the programmed water temperature Tset
61. ion 1 Undo the screws of the plastic covers 2 Carefully remove the covers from the appliance The electrical section is now visible 3 Loosen the 2 screws A of the electrical section and remove the protective cap B from the electrical section The connector block C is now visible y Note Consult the table for the connections and consult the electrical diagram for the electrical component connections Electrical connector block Continuous Program Mains controlled Alarm Off Isolating transformer pump pump voltage primary secondary L jt NJL 16 17 18 19 20 3 10 3 Connecting the mains voltage The appliance is supplied without a power cable and isolator Note In order to receive electrical power the appliance has to be connected to the mains power by means of a permanent electrical connection A double pole isolator with a contact gap of at least 3 mm must be fitted between this permanent connection and the appliance The power cable must have cores of at least 3 x 1 0 mm Y Warning Leave the appliance isolated until you are ready to start it up 1 Connect phase L neutral N and earth of the power cable to terminals 22 through 24 of the connection block as indicated in the table 3 10 2 Preparation 2 Fitthe power cable in the strain relief 3 Connect the power cable to the isolator If you have no more conn
62. irst value below 600 hours that can be selected is 500 burning hours In this case the service and maintenance engineer sets the interval to 500 11 WARHIHG MAS BUEMIAGACUES SERVICE REQUIRED Once the set number of burning hours has elapsed the message SERUICE REQUIRED will appear on the display When this message appears the service and maintenance engineer must be contacted 83 84 14 Maintenance frequency Elx Instruction manual BFC 15 15 1 Introduction 15 2 Preparation for maintenance Instruction manual BFC Performing maintenance Attention Maintenance may only be performed by a qualified service and maintenance engineer At each service the appliance undergoes maintenance on both the water side and the gas side The maintenance must be carried out in the following order 1 Preparation for maintenance 2 Water side maintenance 3 Gas side maintenance 4 Finalizing maintenance Note To order spare parts it is important to write down the appliance type and model and the full serial number of the appliance These details can be found on the rating plate Only by ordering with this information can you be sure to receive the correct spare parts To test whether all components are still working properly complete the following steps 1 Activate the MEHU with 2 Use and y to place the cursor beside OFF 3 Confirm OFF with ENTER MENU gt 0FF A WEEE PROGRAM 4 Wa
63. it until the fan has stopped The 8 icon is then dimmed Attention Failure to wait until the fan stops purging can cause damage to the appliance 5 Switch the appliance OFF position 0 using the ON OFF switch on the control panel 85 86 15 Performing maintenance TT THERMO IMD 0423 RO 6 Switch the electronic controller ON by setting the ON OFF switch to position I INTERHAL CHECK The display will now show IHTERHMAL CHECK for about 10 seconds and will then go to the main menu MENU gt 0FF OH WEEE PROGRAM 7 Activate ON mode by going through the following steps Press once on the blue arrow to position the cursor beside GH then press ENTER Confirm the selection THET OFERATION with ENTER 8 If there is no heat demand increase Tset 11 4 Setting the water temperature Note the original setting Draw some hot water off to create heat demand 9 Check whether the heating cycle runs correctly 9 3 The appliance s heating cycle 10 If you have adjusted T return it to the desired value 11 4 Setting the water temperature 11 Remove the plastic cover on the top of the appliance 12 Check the supply and burner pressure 3 11 Checking the supply pressure and burner pressure and adjust them if necessary 13 Check that all components of the chimney flue system are properly attached 14 Check the pressure differential across the orifice plate of the pre
64. l the appliance proceed as follows 1 Open the stop valve 11 in the hot water pipe ana if present the stop valves 4 for the circulation pump 6 2 Close the drain valve 9 Open the nearest hot water draw off point 14 4 Open the stop valve 4 on the cold water side A so that cold water flows into the appliance Completely fill the appliance When a full water jet flows from the nearest draw off point the appliance is full 6 Bleed the entire installation of air for example by opening all draw off points The appliance is now under water supply pressure There should be no water coming out of the expansion valve 15 nor the T amp P valve 3 If this does happen the cause might be The water supply pressure is greater than the specified 8 bar Rectify this by fitting a pressure reducing valve 1 The expansion valve in the protected cold supply setup is defective or incorrectly fitted Filling vented installations To fill the appliance proceed as follows 1 Open the stop valve 11 in the hot water pipe and if present the stop valves 4 for the circulation pump 6 Close the drain valve 9 3 Open the nearest hot water draw off point 14 4 Open the stop valve 4 on the cold water side A so that cold water flows into the appliance Completely fill the appliance When a full water jet flows from the nearest draw off point the appliance is full Bleed the entire inst
65. leshooting table for displayed errors 72 Maintenance frequency 5 83 Introduction e e ee ee ee ee eee 83 Determining service interval 83 Performing maintenance 85 Introdu tion ss 200 E eve ey See eS ey SS ea 85 Preparation for maintenance 85 Water side maintenance 87 Gas side maintenance 88 Finalizing maintenance 88 Warranty certificate 89 General warranty 89 Instruction manual BFC 17 Instruction manual BFC 16 2 16 3 16 4 16 5 16 6 16 7 17 1 17 2 17 3 Tank warranty 89 Conditions for Installation and use 89 Exclusions 90 Scope of the warranty 90 Claims 545 5552r5rrrrnrnnrnno 90 Obligations of A O Smith 90 Appendices lt lt lt 91 Introduction lt lt lt lt lt 91 Electrical diagram eee 92 Week program card 95 Table of contents Instruction manual BFC GA ES 1 1 1 About the appliance 0063 1 2 What to do if you smell gas 1 3 Regulations
66. maintenance frequency is provided elsewhere in the manual 14 Maintenance frequency Instruction manual BFC 54 Status of the appliance AGA ES Instruction manual BFC GA ES 9 Starting and running 9 1 Introduction Topics covered in this chapter in sequence Starting and running e The appliance s heating cycle 9 2 Starting and running Start the appliance as follows 1 Fill the appliance 5 Filling 2 Open 3 5 Installation diagram the manual gas valve 3 Switch on the power to the appliance using the isolator between the appliance and the power supply 4 Switch the electronic controller ON by setting the ON OFF switch to position I CIN SS SUD n El The display will now show IHTERHAL CHECE for about 10 seconds and go to the main menu THERMO 080800 INTERMAL CHECK HeaeBaw MEHL 0FF ON WEEK PROGRAM 5 Press the blue arrow once YH to position the cursor in front of GM and press ENTER The display shown in the figure will appear Instruction manual BFC Heaeeaw 3START OPERATION CHANGE SETPOINT Tset 65 C 6 Confirm the STRET OPERATION by pressing ENTER The appliance is now in ON mode If there is a heat demand the appliance will run through the heating cycle 9 3 The appliance s heating cycle If the heating cycle is not run there is no heat demand if this is the case Tset will probably need to be set 1
67. n area where this is permitted for this category of appliance Concentric connections The table shows the requirements for concentric systems Y Warning Install flue gas discharge pipe runs with a run off of 5 mm per metre Flue gas discharge requirements for concentric systems C13 C33 Appliance Diameter Maximum length Maximum number of 90 bends 80 125 mm 7 100 150 mm 7 100 150 mm 7 100 150 mm 4 Attention Both conditions stated in the table must be fulfilled Even if there are less bends than the stated maximum the maximum pipe length may not be exceeded Even if the total pipe length is less than the stated maximum the maximum number of bends may not be exceeded The following example illustrates how to use the table Practical example of concentric flue gas discharge Example The figure shows a BFC 30 installation The appliance must be fitted with 25 m of concentric pipe C13 C33 and four 90 degree bends We need to check whether this configuration complies with the requirements stated in the table Instruction manual BFC EJA Instruction manual BFC Appliance with concentric flue gas discharge material IMD 0284 R1 According to the table the maximum length allowed is 40 metres and there may be up to seven 90 degree bends Both requirements are fulfilled Specifications Attention For type C13 and C33 installations A O Smith prescribes the use of a roof or wall mount
68. n connection with the appliance s weight take account of the maximum floor loading refer to the table Weight specifications related to maximum floor load Weight of the appliance filled with water BFC 28 394 kg BFC 30 BFC 50 BFC 60 582 kg Water composition The appliance is intended for heating drinking water The drinking water must comply with the regulations governing drinking water for human consumption The table gives an overview of the specifications Water specifications Water composition Hardness gt 1 00 mmol l alkaline earth ions German hardness gt 5 6 dH French hardness gt 10 0 fH English hardness gt 7 0 eH Conductivity gt 125 uS cm Acidity pH value 7 0 lt pH value lt 9 5 Note If the water specifications deviate from those stated in the table then the tank protection cannot be guaranteed 16 Warranty certificate Working clearances For access to the appliance it is recommended that the following clearances are observed see figure AA around the appliance s control column and cleaning openings 100 cm BB all sides of the appliance 50 cm Above the appliance room to replace the anodes 100 cm if using fixed anodes or 50 cm if using flexible anodes Instruction manual BFC Elx Instruction manual BFC If the available clearance is less than 100 cm flexible magnesium anodes may be ordered Note When installin
69. n engineer or service and maintenance engineer you must ensure that the entire installation complies as a minimum with the official local e building regulations energy supplier s directives for existing gas installations e directives and technical guidelines for natural gas installations e safety requirements for low voltage installations e regulations governing the supply of drinking water e regulations governing ventilation in buildings e regulations governing the supply of air for combustion e regulations governing the discharge of products of combustion requirements for installations that consume gas e regulations governing indoor waste water disposal O E AOS e regulations imposed by fire brigade power companies and municipality Furthermore the installation must comply with the manufacturer s instructions Note Later amendments and or additions to all regulations requirements and guidelines published on or prior to the moment of installing will apply to the installation 1 4 Target groups The three target groups for this manual are end users e installation engineers e service and maintenance engineers Symbols on each page indicate the target groups for whom the information is intended See the table Target group symbols Target group End user Installation engineer Service and maintenance engineer 1 5 Maintenance A service should be carried out at least o
70. nce a year both on the water side and on the gas side Maintenance frequency depends among other things on the water quality the average burning time per day and the set water temperature Note To determine the correct maintenance frequency it is recommended to arrange for the service and maintenance engineer to check the appliance on both the water and gas side within three months following installation Based on this check the best maintenance frequency can be determined Note Regular maintenance extends the service life of the appliance Note Both the end user and the service and maintenance engineer are responsible for regular maintenance They will need to establish clear agreements on this Note If the appliance is not regularly maintained the warranty will become void 10 Instruction manual BFC AEJK 1 6 Forms of notation Instruction manual BFC The following notation is used in this manual Note Important information Attention Ignoring this information can lead to the appliance being damaged Y Warning Failure to carefully read this information may lead to personal injury and serious damage to the appliance 11 1 Overview of this document 1 7 Chapter Introduction AEX The table provides an overview of the contents of this document Contents of this document Target groups Description Working principle of the appliance ga EN X This chapter desc
71. ng in the appliance OH In this mode the appliance continually responds to the hot water demand 11 3 Switching on the ON mode WEEK PROGRAM Select this option to allow the appliance to respond to demand only during pre programmed periods 11 5 Week program Outside those periods only frost protection is active EXTRA PERIOD Select this option to overrule the FF mode or FROG mode i e Week program so that a single temporary period 11 10 Extra period of heat demand will be fulfilled SETTINGS Select this option to set 11 12 Settings the language and the time You can also use this option to display the regulation interval temperature and the ignition and working speeds of the fan Note If you fail to make any selection with the main menu open then after 30 seconds the appliance will automatically return to the mode it was previously in 11 2 Notational convention for menu related instructions The HEHU E of the electronic controller is divided into submenus For example SETT THES is one of the functions reached from the main menu The SETTIHES menu is divided into submenus in turn Instruction manual BFC menu For example LAMGUAGE is a submenu of SETTINGS So for example to select the LANGUAGE menu this manual uses the following notational convention ES SETTINGS LANGUAGE Confirm with ENTER This means 1 Ea Activate the main menu with lt 2 SETTINGS Use the 4
72. nition fan speed rpm Working speed of fan rpm Regulation interval C Call up the menu to display the appliance specifications as follows 1 c SETTINGS Confirm with ENTER MEHL WEEK PROGRA EXTEA PERIOD SETTIHGS 2 Scroll with Y to SFECTFICATIONS Confirm with ENTER SETTINGS LAHGUAGE DAY TIME SPECIFICATIONS 66 AE The display shows the sub menu for displaying appliance specifications SPECIFICATIONS REGULATION INTERWAL IGHITIOH SPEED WORE THG SPEED 3 Scroll with to the section to be displayed for example REGULATION THTERUBL The relevant display appears REGULATION IHTERVAL 40 88 C Instruction manual BFC El 12 Service program 12 1 Introduction The service program is used by the installation engineer or service and maintenance engineer for Setting the hysteresis Displaying the error history e Displaying the appliance history e Display the selected appliance e Switching the pump on or off Setting the service interval Setting the display contrast Setting the display backlight time e Setting the display scroll speed SERVICE MEHU H FS TERESE gt HISTORY OF ERRORS APPLIANCE HISTORY SELECT APPLIANCE PUMF RELAY SERUICE IHTERLAL CONTRAST DISPLAY TIME BACKLIGHT SCROLLSPEED These sub menus are briefly described in the following paragraphs If you are not familiar in general with how to u
73. nstruction manual BFC Warranty certificate To register your warranty you should complete and return the enclosed warranty card after which a warranty certificate will be sent to you This certificate gives the owner of a appliance supplied by A O Smith water Products Company B V of Veldhoven The Netherlands hereinafter A O Smith the right to the warranty set out below defining the commitments of A O Smith to the owner If within one year of the original installation date of a water heater supplied by A O Smith following verification and at the sole discretion of A O Smith a section or part with exclusion of the tank proves to be defective or fails to function correctly due to manufacturing and or material defects then A O Smith shall repair or replace this section or part If within 3 years of the original installation date of a water heater supplied by A O Smith following inspection and at the sole discretion of A O Smith the glass lined steel tank proves to be leaking due to rust or corrosion occurring on the water side then A O Smith shall offer to replace the defective water heater with an entirely new water heater of equivalent size and quality The warranty period given on the replacement water heater shall be equal to the remaining warranty period of the original water heater that was supplied Notwithstanding that stated earlier in this article in the event that unfiltered or softened water is used or allowed
74. ntroller If the frequency is correct but the error persists replace the Internal error message EEPROM read electronic controller from the appliance error controller 50 Hz error Internal communication error Internal error message Gas valve relay from the appliance error controller Safety relay error Ignition relay error RAM error EEPROM error EEPROM contents do not match the software version Processor software error C03 blocking error Too many resets in too Wait for the error to disappear maximum 1 hour If the error does To replace the necessary parts you must contact your installation short a period not disappear replace the appliance controller engineer Reset error C04 blocking error Incorrect appliance Check whether the correct appliance is selected 12 5 Display If the error cannot be resolved or is persistent contact your selection Incorrect the selected appliance installation engineer Appliance selection selection resistor To replace the necessary parts you must contact your installation If the correct appliance is selected fit the correct selection error resistor engineer If incorrect appliance selected select the correct one Instruction manual BFC 80 Code Description E01 blocking error The temperature protection at the top of the tank has been activated The temperature of the water at the top of the tank is gt 85
75. nvention for menu related instructions 59 Switching on the ON mode 59 Setting the water temperature 59 Week program ee ee ee eee 60 Starting and stopping the week program 60 Changing the appliance s standard week program 60 Adding times to a week program 62 Deleting times from a week program 63 Extra period 63 Programming an extra period 64 Settings ee eee 65 Service program 2 225 67 Introduction 22 ee ee eee 67 Setting the hysteresis 67 Displaying the error history 67 Displaying the appliance history 68 Display the selected appliance 68 Switching the pump on or off 68 Setting the service interval 68 Setting the display contrast 68 Setting the display backlight time 68 Setting the display scroll speed 68 Troubleshooting 5 69 Introduction 69 Troubleshooting table for general errors 70 Troub
76. o greater than 50 Nm Use suitable tools for this Cleaning condensation water discharge Regular cleaning of the condensation drain and siphon is essential for prevention of blockages Introduction The following steps must be carried out on the gas side 1 Clean the burner s 2 Clean the orifice s 3 Cleaning the heat exchanger 4 Finalizing maintenance Clean the burner s 1 Detach the burner s 2 Remove all contamination present on the burner s 3 Fit the burner s Clean the orifice s 1 Detach the orifice s 2 Remove all contamination present in the orifice s 3 Fit the orifice s Cleaning the heat exchanger 1 Detach the burner 2 Clean the combustion chamber of the heat exchanger using a vacuum cleaner and a soft brush Detach the flue gas discharge Clean the end of the heat exchanger using tap water Fit the burner on rw Fit the flue gas discharge Note Check the pressure differential again after cleaning If the pressure difference is too low following cleaning please contact the supplier of the appliance To finalize the maintenance carry out the following steps 1 Fill the appliance 5 Filling 2 Start the appliance 9 Starting and running 3 Erase the message SERVICE REGUTFED Do this by pressing once on RESET then once on ENTER Instruction manual BFC AEX 16 16 1 General warranty 16 2 Tank warranty 16 3 Conditions for Instal lation and use I
77. ogram The week program can be started up from any other operating mode as follows 1 Ea WEEE PROGRAR START OPERATION Confirm with ENTER A week program can be shut down simply by activating a different operating mode for example the ON mode 11 7 Changing the appliance s standard week program Note First fill in the desired week program on the supplied week program card A week program is made up of a number of programmable periods in which you can have the appliance switch on and off A period consists of e switch on time day of the week hours and minutes e switch off time hours and minutes the water temperature setting on off setting for a program controlled pump Note The switch off time must always be followed by a switch off time on the same day of the week A maximum of three periods may be programmed per day You can program a maximum of 21 periods Call up the menu for the week program as follows ce WEEK PROGRAM PROGRAM OUERUTEL Confirm with ENTER WEEK PROGRAM START OPERATION PROGRAM OVERVIEW Instruction manual BFC AE The display shows the menu for the week program see the figure below With the default setting the program switches on and off every day at 00 00 and 23 59 hours respectively the water temperature is 65 C and the pump is switched on F DAY TIME OM 50 BE ee OFF SU 23559 OM MO Be ae OFF MO 0H TL OFF TL OH We OFF ME OM TH OFF 0H OFF
78. ontact your installation engineer S13 blocking error Short circuit in sensor 2 of temperature sensor T1 at the top of the tank Short circuit in sensor circuit Replace sensor T4 To replace the necessary parts you must contact your installation engineer S14 blocking error Short circuit from dummy 1 Short circuit in sensor circuit Replace the dummy sensor 2 To replace the necessary parts you must contact your installation engineer S15 blocking error Short circuit from dummy 2 Short circuit in sensor circuit Replace the dummy sensor To replace the necessary parts you must contact your installation engineer F01 blocking error Defect in power supply circuit Live and neutral connected wrong way round Connect live and neutral correctly 3 10 Electrical connection the appliance is phase sensitive See the BFC electrical diagram 17 Appendices Condensation on the flame probe Disconnect the lead at the flame probe Ignite the appliance three times with an interrupted ionisation circuit Reconnect the ionisation lead to the flame probe Ignite the appliance again The repeated ignition attempts will have caused the condensation to evaporate If errors persist contact your installation engineer Floating neutral Instruction manual BFC Install an isolating transformer 3 10 4 Isolating transformer Contact your installation engineer
79. open until the unsafe situation has been rectified The appliance is fitted standard with a connecting point for a T amp P valve 3 6 2 Hot water side Instruction manual BFC VEX 3 1 Introduction 3 2 Packaging 3 3 Environmental conditions Instruction manual BFC Installation Y Warning Installation work should be carried out by an approved installation engineer in compliance with the general and local regulations imposed by the gas water and power supply companies and the fire service The appliance may only be installed in a room that complies with the requirements stated in national and local ventilation regulations 1 3 Regulations This chapter describes the installation activities to be carried out before you actually start using the appliance 9 Starting and running namely e Packaging Environmental conditions e Technical specifications e Water connections Unvented Water connections Vented e Gas connection e Air supply and flue Electrical connection e Checking the supply pressure and burner pressure In the event of conversion to a different gas category see conversion 4 Conversion to a different gas category To avoid damaging the appliance remove the packaging carefully We recommend unpacking the appliance at or near its intended location Attention The appliance may only be manoeuvred in an upright position Take care that the appliance is not damaged after unp
80. oved these errors require a reset with the RESET button before the appliance can resume operation BLOCKING ERRORS These errors disappear automatically once the cause of the error has been removed after which the appliance resumes operation by itself The manual includes a table of error messages that can appear on the Instruction manual BFC 13 3 Troubleshooting table for displayed errors 69 13 2 Troubleshooting table for general errors Y Warning Maintenance may only be performed by a qualified service and maintenance engineer General errors Symptom Gas smell Solution Warning Close the main gas valve immediately Warning Do not operate any switches Warning No naked flames Warning Ventilate the boiler room Remark Y Warning Contact your installation engineer or local gas company immediately Display is off Appliance is turned off Start the appliance up 9 Starting and running No supply voltage present 1 2 3 4 5 Check if the isolator is ON Check that there is power to the isolator Check whether the ON OFF switch of the electronic controller is ON position l Check whether there is power to the electrical connector block The measured voltage must be 230 VAC 15 10 See the BFC electrical diagram 17 Appendices If the error persists consult your installation engineer Defective fuse s Instruction manual BFC Replace fuse s
81. re switch hose 4 Remove the burner as complete assembly 8 Place and fit the burner with parts from the conversion kit Note The burner for LP gases can be recognised by the letter P which is stamped into the metal of the gas air distribution plate 5 9 Select and fit the correct orifice from the conversion kit based on the gas table 3 4 3 Gas data The injector diameter is stamped into each injector 6 Conversion of gas control IMD 0079b R2 Instruction manual BFC VEX Instruction manual BFC 10 Check whether there is a burner pressure regulator 7 attached to the top of the gas control or simply a blank plate 8 Note In the event of the supply pressure for a gas category being the same as the burner pressure 3 4 3 Gas data the gas control must be fitted with a blanking plate with a cork gasket A burner pressure that deviates with respect to the supply pressure requires a burner pressure regulator with rubber gasket to be used Each conversion kit contains all the necessary components 11 If the blank plate or burner pressure regulator need to be replaced Unscrew the connector 9 from the gas control If necessary remove the blank plate or burner pressure regulator 7 If necessary fit the blank plate or burner pressure regulator supplied with the conversion kit Fit the gas control s connector 9 12 Fit the connector 1 of the hot surface igniter
82. ribes how the appliance functions Installation This chapter describes the installation activity to be completed before you actually start up the appliance Filling HX 5 lt This chapter describes how to fill the appliance Draining s lt This chapter describes how to drain the appliance The control panel 5 lt This chapter describes the general control of the appliance using the display Status of the appliance This chapter describes the status mode or condition that the appliance may have and possible actions to take Starting and running This chapter describes how to start the appliance running The general heating cycle of the appliance is also described Shutting down 5 lt This chapter describes how to shut the appliance down for a brief or long period of time Main menu El ge ge e xx 06106126106 10 This chapter describes the main menu of the display This is the actual menu for the user however the installation engineer and service and maintenance engineers will also need to use this menu Service program x This chapter describes the service menu It is mainly intended for the installation engineer and service and maintenance engineers End users may also refer to this chapter for additional information about the appliance Troubleshooting gt e a ee ye X This chapter is mainl
83. se the displays and menus first read the relevant section 7 The control panel Note The notation convention for the service menu is identical to that of the main menu 11 2 Notational convention for menu related instructions The difference is you use X to bring up the service program instead of 2 which brings up the main menu 12 2 Setting the hysteresis If the preset temperature SETPOINT is higher than the current water temperature then the appliance might not immediately start the heating cycle 9 3 The appliance s heating cycle To prevent excessively frequent switching on and off there is a heating margin We refer to this margin as the Instruction manual BFC hysteresis The standard setting for this margin is 2 C The heating cycle starts if the water temperature drops to 2 C below the SETPOINT and ends when the water reaches 2 C above the SETPOINT ches lleiiest UP 33C Set the hysteresis via HYSTERESE UP The figure shows an example Set the hysteresis via S HYSTERESE DOHA 12 3 Displaying the error history Display the error history as follows S HISTORY OF ERRORS The controller will display an overview of Blocking errors and Lock out errors In both cases the electronic controller reserves 15 lines for the last 15 error messages If there are fewer than 15 error messages an ellipsis is displayed The display first shows the Blocking errors When ENTER is presse
84. ssure switch see the table If the pressure difference is too low the heat exchanger must be cleaned 15 4 4 Cleaning the heat exchanger Pressure switch pressure differential Appliance Observed pressure differential across the pressure switch Pa BFC 28 gt 635 BFC 30 gt 885 BFC 50 gt 885 BFC 60 gt 1085 Instruction manual BFC 15 3 Water side mainte nance 15 3 1 15 3 2 15 3 3 Instruction manual BFC 15 Test the operation of the overflow valve of the protected cold supply setup The water should spurt out 16 Test the overflow operation of the T amp P valve The water should spurt out 17 Check the drain pipes from the discharge points of all valves and remove any lime buildup that may be present 18 Drain the appliance see Draining Introduction The following steps must be carried out on the water side 1 Checking the anodes 2 Descaling and cleaning the tank 3 Cleaning condensation water discharge Checking the anodes Timely replacement of the anodes extends the service life of the appliance The appliance s anodes must be replaced as soon as they are 60 or more consumed take this into consideration when determining the maintenance frequency 1 Loosen the anodes using suitable tools 2 Check the anodes and if necessary replace them Descaling and cleaning the tank Scale and lime buildup prevent effective conduction of the heat to the water Perio
85. stem This valve also prevents water from flowing backwards from the tank into the cold water supply system The pressure reducing valve protects the installation against an excessively high water supply pressure gt 8 bar These components are fitted to the cold water pipe 3 7 Water connections Vented Vented installation With a vented installation excess pressure is taken up by the open cold water head tank The height of the head tank determines the working pressure in the water heater which may not exceed 8 bar The installation must also be fitted with a vent pipe from the hot water pipe that opens into the cold water tank Ideally the vent pipe should discharge into a separate tundish drain or otherwise to the open cold water head tank The water heater should also be fitted on the hot water side with a stop valve 3 6 2 Hot water side T amp P valve A T amp P valve is only mandatory in an unvented installation However A O Smith also recommends the use of a T amp P valve in vented installations A T amp P Temperature and Pressure Relief valve monitors the pressure in the tank and the water temperature at the top of the tank If the pressure in the tank becomes excessive gt 10 bar or the water temperature is too high gt 97 C the valve will open The hot water can now flow out of the tank Because the appliance is under water supply pressure cold water will automatically flow into the tank The valve remains
86. switch opens The icons B and amp are dimmed The message POST PURGE vanishes HeaeBew id BS Thursday With any subsequent heat demand the heating cycle will resume from step 1 Instruction manual BFC GAS 10 Shutting down 10 1 Introduction This chapter describes Shut the appliance down for a brief period OFF mode e Electrically isolating the appliance Shutting the appliance down for a long period 10 2 Shut the appliance down for a brief period OFF mode To shutthe appliance down for a brief period you must activate the frost protection You can use the frost protection to prevent water freezing in the appliance Activate the frost protection as follows 1 Press the lt a button to select the main menu 2 Use t and Y to position the cursor in front of AFF Confirm with ENTER DFF 12 45 Thursday 646 C FROST FROTECTION ACTIUATED The frost protection cuts in if the water temperature drops below 5 C The text FROST will then appear on line one of the display The appliance heats the water to 20 C Tse and drops back to the FF mode Note These values of 5 C and 20 C cannot be adjusted 10 3 Electrically isolating the appliance The appliance should only be isolated from mains power in the correct way The correct procedure is as follows 1 Activate the MENU with 2 Position the cursor in front of FF 3 Confirm OFF with ENTER MENU 0F
87. ta non return valve 5 and an expansion vessel 16 Fit an expansion valve 15 and connect the overflow side to an open wastewater pipe Hot water side See B in the installation diagram 3 5 Installation diagram y Note Insulating long hot water pipes will prevent unnecessary energy loss 1 Optional fit a temperature gauge 12 so you can check the temperature of the tap water 2 Fit the T amp P valve 3 3 Fita stop valve 11 in the hot water outlet pipe for servicing Circulation pipe See C in the installation diagram 3 5 Installation diagram If an immediate flow of hot water is required at draw off points a circulation pump can be installed This improves comfort and reduces water wastage 1 Fita circulation pump 6 of the correct capacity for the length and resistance of the circulation system 2 Fita non return valve 5 behind the circulation pump to guarantee the direction of circulation 3 Fit two stop valves for service purposes 4 4 Connect the circulation pipe to the cold water supply pipe Condensation drainage 1 Fit a sloping wastewater pipe to the siphon 13 for condensation drainage and connect this to the wastewater discharge in the boiler room Attention All fittings behind the siphon must be condensation resistant Instruction manual BFC VEX 3 7 Water connections Vented Instruction manual BFC 3 7 1 3 7 2 3 7 3 3 7 4 Y Warning The installation sho
88. tate changes Check for cracks in the hoses on the pressure switch and in the air supply hose between fan and burner If necessary replace the hoses Check that the hoses on the pressure switch and the air supply hose between fan and burner are correctly fitted Refit them if necessary Check that the flue gas outlet is compliant 3 9 Air supply and flue Check for blockage in the flue gas discharge Remove any blockage that may be present Check for blockage in the condensation water discharge Remove any blockage that may be present Measure the pressure differential across the pressure switch See the table in Preparation for maintenance 15 2 Preparation for maintenance If there is insufficient pressure differential clean the heat exchanger If the pressure differential is acceptable check that the pressure switch is closing using a multimeter F11 blocking error Defective gas valves See F07 Flame detection with closed gas valve Instruction manual BFC 79 Code Description Solution Remark C02 lock out error Incorrect reference Reset electronic controller To replace the necessary parts you must contact your installation voltage from the AD engineer converter Check that the frequency of the power supply is compliant 3 4 2 General and electrical specifications If this Error message from the y E is not the case contact your installation engineer appliance co
89. the backlight time the time that the display backlight remains lit after the last button is pressed as follows S TIME BACKLIGHT The standard value is 255 s The range is 0 to 255 seconds The figure shows the related display TIME BACKLIGHT 12 10 Setting the display scroll speed Adjust the control speed via e SCROLL SPEED The default is 10 The range is from 0 through 100 Setting the value too high or low will make scrolling difficult SCROLLSPEED Instruction manual BFC AEJK 13 Troubleshooting 13 1 Introduction A distinction is made between General errors General errors are not reported on the display General errors are Gas smell Display does not light up Insufficient or no hot water Water leakage Explosive ignition The manual includes a table with general errors 13 2 Troubleshooting table for general errors e Displayed errors Errors are reported on the display as follows Line one an error code and a brief description The code consists of a letter and two digits Lines two three and four a long description alternating with a recommended action See the figures The first shows a possible error the second shows the appropriate checking action SENSOR ERROR TOF TAHE SEMSOR 1 HOT CONNECTED SENSOR ERROR CHECK TOF TAHKE SENSOR There are various types of errors all falling into one of two groups LOCK OUT ERRORS When the cause has been rem
90. the hot water pipes You can skip this step if you there is no pump in your hot water circuit Confirm with ENTER The cursor moves to THET ba Eta ON START 2 Confirm with ENTER The extra period has been programmed Note Once the extra period has completed running the controller returns to the mode ON OFF or WEEK PROGRAM The following week the extra period will NOT be automatically switched on Instruction manual BFC AEJK 11 12 Settings Using the SETTINGS option you can adjust certain settings and read certain appliance data e Adjustable settings Language of the menu Current day of week and time Displayable appliance specifications this category is only relevant to the installation engineer and or service and maintenance engineer Control range water temperature Ignition speed of fan Working speed of fan 11 12 1 Setting menu language To set menu language MEHL WEEK PROGRAM EXTRA PERIOD SETTIHEGS 1 Call up the menu for selecting the language as follows 2 ca SETTINGS Confirm with ENTER The display shows the menu for settings SETTINGS LANGUAGE DAY TIME SPECIFICATIONS 3 The cursor is positioned beside LAHGUAGE Confirm with ENTER The display shows the language selection menu LARELAGE EHGL ISH HEDERLANDS DEUTSCH FRANCATS ITALTAHO CZECH ESPANOL 4 Scroll with Y to the desired language Confirm with ENTER T
91. the hot surface igniter 20 and the water becomes heated As soon as Tnet rises above Tye the heat demand ends and the electronic controller stops the heating cycle The electronic controller assumes a certain margin both when registering and ending heat demand We refer to this margin as the hysteresis 12 2 Setting the hysteresis Introduction The electronic controller monitors the water temperature and ensures safe combustion This is achieved by e the Water temperature protection e theGas valve the Fan e the Pressure switch e the Flame probe Instruction manual BFC AEJK 2 4 2 Protection Water temperature protection The electronic controller uses temperatures sensors T1 7 and T2 13 to monitor three temperatures that are important for safety The table explains the functioning of the temperature sensors Temperature protection Description Against frost T1 lt 5 C or T2 lt 5 C The frost protection cuts in The water is heated to 20 C For maximum water temperature T1 gt 85 C or T2 gt 85 C The high limit safeguard serves to prevent overheating and or excessive formation of scale in the appliance If the high limit safeguard is activated the heating is stopped This causes the water in the tank to cool down Once the water has cooled sufficiently T1 lt 78 C the electronic controller resets the appliance For extra safety T1 gt 93 C or T2 gt 93 C
92. ting an extra ON mode switch Tank ON Tank ON is a facility for connecting an external ON OFF switch In the OFF position the programmed operating state is active In the ON position the programmed operating mode is overruled and the ON mode is active 1 Connect cables X4 and X gt to terminals 5 and 6 as indicated in the table 3 10 2 Preparation Fit the cable in the strain relief 3 If you have no more connections to make Fit the cap on the electrical terminal block Fit the plastic covers onto the appliance 3 10 8 Connecting an extra error signal Alarm OUT Alarm OUT is a potential free terminal that is switched when an error is detected This can be used to signal errors for example with a lamp A 230 V circuit can be directly powered Other voltages require a relay prescribed by the manufacturer 1 Connect the phase cables X4 and X23 to terminals 13 and 14 according to the table 3 10 2 Preparation If required connect earth to terminal 15 Fit the cable in the strain relief If you have no more connections to make Fit the cap on the electrical terminal block Fit the plastic covers onto the appliance Instruction manual BFC 35 3 Installation Y 3 11 Checking the supply Note pressure and burner Before starting the appliance and or checking the supply pressure and pressure burner pressure you must fill 5 Filling the appliance Attention Before starting up for the first tim
93. tion diagram Installation diagram Legend UNVENTED E a p Only applicable numbers are mentioned 1 pressure reducing valve mandatory 3 T amp P valve mandatory 4 stop valve recommended in pipe C and mandatory in pipe A 5 non return valve mandatory 6 circulation pump optional 9 drain valve 10 manual gas valve mandatory 11 service stop valve 12 temperature gauge optional 13 condensation drainage 14 hot water draw off points 15 expansion valve mandatory 16 expansion vessel mandatory 17 3 way aeration valve recommended 18 water tank 19 float valve A cold water supply VENTED hot water supply circulation pipe gas supply overflow pipe overflow pipe Imoow IMD 0464 RO Instruction manual BFC 23 3 3 6 Water connections Unvented 24 3 6 1 3 6 2 3 6 3 3 6 4 Installation ye py Y Warning The installation should be carried out by an authorised installation engineer in compliance with general and local regulations 1 3 Regulations Cold water side See A in the installation diagram 3 5 Installation diagram 1 Fitan approved stop valve 4 on the cold water side as required by applicable regulations 1 3 Regulations 2 The maximum working pressure of the appliance is 8 bar Because the pressure in the water pipe at times can exceed 8 bar you must fit an approved pressure reducing valve 1 3 Fi
94. to have an isolating transformer installed 73 Code Description Solution Remark F02 lock out error Fan fails to run at correct speed Defective motor and or rotor gt gt Check the motor and rotor Replace the fan if the motor or rotor is defective Reset appliance controller Damaged wiring Check the wiring between the fan and the controller If any wires are damaged the wiring harness must be replaced Reset appliance controller Dirty or blocked fan Check if the fan is dirty Check that the rotor can rotate freely Reset appliance controller Because of a drop in the supply voltage the fan is not running at the correct speed Nc A ON SA NS Check the supply voltage this must be 230 VAC 15 10 Reset appliance controller See the BFC electrical diagram 17 Appendices To have the wiring replaced and a new fan fitted you must contact your installation engineer The F02 entries below are applicable solely to appliances that have a 3 phase fan with frequency controller Fun supplying insufficient pressure The live phase wires between freq controller and fan are connected wrong way around 1 2 Check the wiring between the fan and the frequency controller Rectify the assembly if it is incorrect Reset appliance controller Fan speed too low Instruction manual BFC ak WN Ss Check the fan speed If the fan speed is too low che
95. trolled pump 5 To activate the week program with the new period added scroll down with Y to START OPERATION and confirm with ENTER Instruction manual BFC AGA ES 11 9 Deleting times from a week program All switch on off times are shown sequentially in the display Assume that the switch on off times for the appliance are programmed as in the figure TIME Tset as 15 FSC P INSERT DELETE START OPERATION To delete a period proceed as follows 1 ca WEEE PROGRAM PROGRAM QUERUTENM Confirm with ENTER MENU OFF 20H WEEE PROGRAM 2 Scroll with Y to FEOGRAM OUNERNTER Confirm with ENTER WEEK FROGRAN START OPERATION 3PROGRAM ONERUTEU The display shows the menu for the week program 3 Scroll with Y to DELETE Confirm with ENTER To warn you that you are now working in the delete sub menu the cursor is replaced with an exclamation mark and the period settings flash DAY TIME OW SU Be Su INSERT DELETE START OPERATION 4 Scroll with Y to the day to be deleted For example Sunday in the second period See the figure Instruction manual BFC Confirm with ENTER DAY TIME Tset ON ISU 16 60 F5 C FP OFF SU 22 06 OH MO Baba 65 C P OFF MO 23239 5 Thelines showing switch on off times are replaced by the text DELETE BLOCK See the figure Confirm with ENTER or use RESET to cancel TIME Tset DELETE BLOCK BEIGE 65
96. uld be carried out by an authorised installation engineer in compliance with general and local regulations 1 3 Regulations Cold water side See A in the installation diagram 3 5 Installation diagram 1 Fitan approved stop valve 4 on the cold water side between the cold water head tank 18 and the appliance as required by regulations 1 3 Regulations Hot water side See B in the installation diagram 3 5 Installation diagram Note Insulating long hot water pipes prevents unnecessary energy loss 1 Fit the T amp P valve 3 2 Optional fit a temperature gauge 12 so you can check the temperature of the tap water 3 Fita stop valve 4 in the hot water outlet pipe for use when servicing 4 Ifa circulation pipe is required continue further by installing the circulation pipe 3 6 3 Circulation pipe Circulation pipe See C in the installation diagram 3 5 Installation diagram If an immediate flow of hot water is required at draw off points a circulation pump can be installed This improves comfort and reduces water wastage 1 Fita circulation pump 6 of the correct capacity for the length and resistance of the circulation system 2 Fita non return valve 5 behind the circulation pump to guarantee the direction of circulation 3 Fit two stop valves for service purposes 4 4 Connect the circulation pipe to the cold water supply pipe Condensation drainage 1 Fit a sloping wast
97. ure and pressure relief valve fitted in accordance with installation instructions of A O Smith applying to the specific model of water heater and further in compliance with the government and local authority installation and building codes rules and regulations 89 16 4 16 5 16 6 16 7 90 16 Exclusions Scope of the warranty Claims Obligations of A O Smith Warranty certificate AN WE X i The appliance is at all times fitted with cathodic protection If sacrificial anodes are used for this these must be replaced and renewed when and as soon as they are 60 or more consumed When electric anodes are used it is important to ensure that they continue to work properly The warranty set out in articles 1 and 2 will not apply in the event of a damage to the water heater caused by an external factor b misuse neglect including frost damage modification incorrect and or unauthorised use of the water heater and any attempt to repair leaks contaminants or other substances having been allowed to enter the tank d the conductivity of the water being less than 125 uS cm and or the hardness alkaline earth ions of the water being less than 1 00 mmol litre 3 3 3 Water composition e unfiltered recirculated water flowing through or being stored in the water heater f any attempts at repair to a defective water heater other than by an approved service engineer The obligations of A O
98. ve closed Check whether a flame is still present after the gas valves have closed If this is the case the gas control must be replaced If the error cannot be resolved or is persistent contact your installation engineer To replace the necessary parts you must contact your installation engineer F08 lock out error Error message from safety relay Flame detection before the gas valve opened Reset the electronic controller If the error reappears replace the electronic controller If the error cannot be resolved or is persistent contact your installation engineer To replace the necessary parts you must contact your installation engineer F09 lock out error Water temperature safety The temperature at the top of the tank exceeds 93 C Instruction manual BFC Check that the circulation pump if present is working 2 Check the position of the temperature sensor T4 Reset appliance controller If the error cannot be resolved or is persistent contact your installation engineer 78 EX F10 lock out error Pressure switch not Check the running speed of the fan 12 5 Display the selected If the error cannot be resolved or is persistent contact your closing appliance installation engineer To replace the necessary parts you must contact your installation engineer Code Description Solution Restriction on the number of ignition attempts based on pressure switch s
99. ve the error may only be performed by a service and maintenance engineer There are various types of errors LOCK OUT ERRORS When the cause has been removed these errors require a reset with the button RESET before the appliance can resume operation BLOCKING ERRORS These errors disappear automatically once the cause of the error has been removed after which the appliance resumes operation by itself The display does not show what type of error has been detected A comprehensive overview of the errors is provided elsewhere in the manual 13 Troubleshooting If as end user you find the appliance in an error condition you may attempt to restart the appliance by pressing the RESET button However if the error returns or occurs several times in a short time you must contact your service and maintenance engineer Instruction manual BFC AGA ES 8 4 Service condition The figure shows the message 1 WARH IMG MAS BURM IMG HOURS SERVICE REQUIRED SERUICE REQUIRED Should this message appear then the appliance is in need of a service and maintenance inspection In that case contact your service and maintenance engineer Note The message SERUICE REGUTREDis based on the number of expired burning hours and the preset service interval Should the service interval have been incorrectly selected contact the service and maintenance engineer for instructions on how to adjust this Information on the
100. y nonetheless contain errors and inaccuracies Should you detect any errors or inaccuracies in the manual we would be grateful if you would inform us This helps us to further improve our documentation If you have any comments or queries concerning any aspect related to the appliance then please do not hesitate to contact A O Smith water Products Company PO Box 70 5500 AB Veldhoven Netherlands Telephone free 0870 AOSMITH 0870 267 64 84 General 31 40 294 25 00 Fax 31 40 294 25 39 E mail info aosmith nl Website www aosmithinternational com In the event of problems with connecting to the gas electricity or water supply please contact your installation s supplier installation engineer AGA ES AGA ES Instruction manual BFC 1 1 1 2 1 3 1 4 1 5 1 6 1 7 2 1 2 2 2 3 2 4 2 5 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 3 10 3 11 5 1 6 1 6 2 7 1 7 2 7 3 7 4 7 5 7 6 8 1 8 2 8 3 8 4 Table of contents Introduction lt lt 9 About the appliance 9 What to do if you smell gas 9 Regulations 9 Target groups 10 Maintenance 10 Forms of notation 11 Overview of this document 12 Working principle of the appliance
101. y intended for the installation engineer and the service and maintenance engineer It describes appliance errors These errors are indicated on the display A troubleshooting table of possible causes and solutions is provided End users may also refer to this chapter for additional information about the appliance Maintenance frequency gt x This chapter describes how to determine the optimum frequency at which to carry out maintenance Both the end user and the service and maintenance engineer are responsible for regular maintenance They need to reach clear agreement on this Note If the appliance is not regularly maintained the warranty will become void Performing maintenance This chapter sets out the maintenance tasks to be carried out during a service Warranty certificate 12 This chapter states the warranty terms and conditions Instruction manual BFC GAS 2 1 Introduction 2 2 General working principle of the appliance Legend Only applicable numbers are mentioned 1 cover hot water outlet electrical connector block electronic controller pressure switch control panel temperature sensor T4 combustion chamber 9 anode 10 tank 11 heat exchanger NADAN Working principle of the appliance Topics covered in this chapter e General working principle of the appliance e The appliance s heating cycle e Protection for the appliance Safety of the install
102. y voltage this must be 230 VAC 15 10 If the error persists contact your installation engineer To replace the necessary parts you must contact your installation engineer F05 lock out error Too many flame errors have been signalled Incorrect roof or wall conduit Recirculating flue gases Instruction manual BFC 1 Check that the correct roof or wall flue conduit 3 9 Air supply and flue has been fitted If necessary install the correct roof or wall conduit 3 Check that the roof or wall conduit discharges into a permitted area If the error cannot be resolved or is persistent contact your installation engineer 77 Code Description F06 lock out error Short circuit between flame probe and earth Damaged cable in contact with metal surface Solution Check the wiring of the flame probe If necessary replace the wiring Ceramic part of the flame probe is broken cracked Check that the ceramic part of the flame probe is still intact in the vicinity of the burner s air distribution plate If not the flame probe must be replaced Remark If the error persists contact your installation engineer To replace the necessary parts you must contact your installation engineer F07 lock out error A flame has been detected after the gas valve was closed Defective gas valves Check whether there is still burner pressure present after the gas valves ha

A.O. Smith Cyclone BFC - 60 Installation Manual

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