BFC High Efficient Condensing Water Heater 0311704 5015 - Changes Reserved. BFC - 28/30/50/60/80/100/120 Installation, User and Service Manual Innovation has a name.
your installer A.O. Smith UK, Unit B8 Amstrong Mall, Southwood Business Park, Farnborough, Hampshire GU14 0NR www.aosmith.co.uk “A.O. Smith Water Heaters” is a trading name of Advance Services (Sales) Ltd. Reg.
gis Read this manual carefully Warning Read this manual carefully before starting the water heater. Failure to read the manual and to follow the printed instructions may lead to personal injury and damage to the water heater. Copyright © 2015 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.
gis 4 Instruction manual BFC
gis Contents 1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.1 1.2 1.3 1.4 1.5 1.6 1.7 2 - - - - - - - - - - - - - - - - - - - - - - - -9 -9 -9 10 11 11 12 Working principle of the water heater - - - - - - - - - - - - - 13 2.1 2.2 2.3 2.4 2.
Contents 8 Status of the water heater - - - - - - - - - - - - - - - - - - - 53 8.1 8.2 8.3 8.4 8.5 9 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53 - 53 - 54 - 54 - 54 Starting the water heater - - - - - - - - - - - - - - - - - - - - 55 9.1 9.2 9.
15 Performing maintenance - - - - - - - - - - - - - - - - - - - - 85 15.1 15.2 15.3 15.4 15.5 16 - - - - - - - - - - - - - - - - - - - - - - - 85 85 86 87 88 Warranty (certificate) - - - - - - - - - - - - - - - - - - - - - - 89 16.1 16.2 16.3 16.4 16.5 16.6 16.7 17 General warranty - - - - - - - Tank warranty - - - - - - - - - Conditions for Installation and use Exclusions - - - - - - - - - - - Scope of the warranty - - - - - Claims - - - - - - - - - - - - - Obligations of A.O.
Contents 8 Instruction manual BFC
gis 1 1.1 About the water heater Introduction This manual describes how to install, service and use the BFC water heater. The BFC water heater is a condensing water heater with a fan in the air intake. The BFC can be installed as either an open or room-sealed water heater. A concentric chimney connector is fitted standard to the water heater. Alternatively, the water heater can be connected using a parallel system. The possible installation types are B23, C13, C33, C43, C53 and C63.
1 Introduction gis British and European Standards • BS 6891: Installation of low pressure gas pipework of up to 35 mm (R1¼) in domestic premises (2nd family gas) - Specification. Note: for lager installations see IGE/UP/2 below. • BS 6798: Specification for installation and maintenance of gas-fired boilers of rated input not exceeding 70 kW net. • BS 6644: Specification for installation of gas-fired hot water boilers of rated inputs between 70 kW (net) and 1.8 MW (net) (2nd and 3rd family gases).
gis Target group symbols Symbol Target Group (End) user Installation engineer Service and maintenance engineer Caution This water heater is not intended for use by persons with reduced physical, sensory or mental capacities, or who lack the necessary experience or knowledge, unless the person responsible for their safety is supervising them or has explained to them how the water heater should be used. Caution This water heater is not intended to be used by children.
1 1.7 Overview of this document Introduction gis The table provides an overview of the contents of this document. Contents of this document Chapter Target groups Description Working principle of the water heater This chapter describes the working principle of the appliance. Installation This chapter describes the installation activity to be completed before you start the appliance for the first time.
gis 2 2.1 2.2 Introduction General working principle of the water heater Working principle of the water heater This chapter covers the following topics: • General working principle of the water heater; • Water heater operating cycle; • Protection for the water heater; • Safety of the installation. The water heater is fitted with a modulating premix burner system with 1:1 gasto-air ratio regulation. The air required for combustion is delivered by the fan (18).
Cut-away view of the water heater Instruction manual BFC Legend Unused numbers are not applicable 1. cover 2. hot water outlet 3. electrical connector block 4. controller 5. pressure switch 6. control panel 7. temperature sensor T1 8. combustion chamber 9. anode 10. tank 11. heat exchanger 12. inspection and cleaning opening 13. temperature sensor T2 14. cold water inlet 15. drain valve 16. gas control valve 17. burner 18. fan 19. air supply hose 20. hot surface igniter 21. flame probe 22.
gis 2.3 Water heater operating cycle 2.4 Protection for the water heater The temperature sensor T1 (7) measures the water temperature at the top of the water heater Ttop). This temperature is sent to the controller. As soon as T1 is lower than the set water temperature (Tset), the controller registers a "heat demand". The fan (18) starts running and the gas control valve (16) is opened. The fan runs at full speed and the gas is mixed with the air in the venturi (30).
2 Working principle of the water heater 2.4.5 gis Pressure switch The pressure switch only guarantees the supply of air during pre-purging of the water heater. If the pressure difference during pre-purging is sufficient, the pressure switch closes. The table (3.4.2 "General and electrical specifications") shows the trip point for each water heater. Note The trip point of the pressure switch is not adjustable. 2.4.
is 3 Installation Warning The installation must 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 brigade. The appliance may only be installed in a room that complies with the requirements stated in national and local ventilation regulations (1.3 "Regulations"). 3.
3 Installation is The possible installation types are B23, C13, C33, C43, C53 and C63. Caution The water heater may not be used in rooms where chemical substances are stored or used due to the risk of explosion, and corrosion of the water heater. Some propellants, bleaching agents and degreasing agents etc. disperse vapours that are explosive and/or cause accelerated corrosion. If the water heater is used in a room in which such substances are present, the warranty will be void. 3.3.
is Working clearances BB BB AA AA AA AA BFC 28 thru 60 BFC 80 thru 120 IMD-0765 R0 Note When installing the water heater, 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 water heater should be installed above a waste water drain or in a suitable metal leak tray.
3.4.1 Dimensions of the water heater Top and front view of the appliance Legend See the table.
Instruction manual BFC Dimensions (all dimensions in mm, unless otherwise stated) Size Description Unit BFC 28 BFC 30 BFC 50 BFC 60 BFC 80 BFC 100 BFC 120 A Overall height mm 1390 1925 1925 1925 2060 2060 2060 C Position on pallet mm - - - - 530 530 530 D Appliance diameter mm 705 705 705 705 850 850 850 E Depth mm - - - - 1000 1000 1000 F Width mm - - - - 900 900 900 G Diameter of flue gas discharge mm 100/150 100/150 100/150 100/150 130/2
3.4.2 General and electrical specifications DESCRIPTION Unit BFC 28 BFC 30 BFC 50 BFC 60 BFC 80 BFC 100 BFC 120 Contents litres 217 368 368 368 480 480 480 Empty weight kg 177 214 214 214 405 405 405 Maximum floor load kg 394 582 582 582 885 885 885 Maximum operating pressure (vented) kPa (bar) 800 (8) 800 (8) 800 (8) 800 (8) 800 (8) 800 (8) 800 (8) Maximum operating pressure (unvented) kPa (bar) 550 (5.5) 550 (5.5) 550 (5.5) 550 (5.5) 550 (5.
Instruction manual BFC DESCRIPTION Unit BFC 28 BFC 30 BFC 50 BFC 60 BFC 80 BFC 100 BFC 120 Load Profile - XXL XXL XXL XXL 3XL 3XL 3XL Energy Efficiency Class (Energy Label) - A A A A - - - Energy Efficiency % 91 91 91 90 93 93 92 Daily Electricity Consumption kWh 0.207 0.210 0.211 0.212 0.237 0.246 0.257 Daily Fuel Consumption kWh GCV 26.501 26.552 26.562 26.632 49.811 49.922 50.060 Mixed Water 40 °C (V40) ltr.
3.4.3 Gas data II2H3P description Unit BFC 28 BFC 30 BFC 50 BFC 60 BFC 80 BFC 100 BFC 120 Diameter of the venturi restrictor mm - - - - 8.60 8.60 8.60 Nominal load (upper value) kW 32.2 33.3 52.2 63.3 86.6 105.5 128.8 Nominal output kW 31.0 32.7 50.3 60.4 84.2 100.7 121.8 Supply pressure mbar 20 20 20 20 20 20 20 CO2 (full load) Vol% 9.0 + 1.0 9.0 + 1.0 9.0 + 1.0 9.0 + 1.0 8.9 + 1.0 8.9 + 1.0 8.9 + 1.
is 3.5 Installation diagram The figure shows the Installation diagram. This diagram is referred to in the sections describing the actual connection procedure. Installation diagram Legend Vented and unvented Unused numbers are not applicable 1. 3. 4. 5. 6. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. A. B. C. D. E. H.
3 3.6 Installation Unvented water connections is Warning The installation should be carried out by a competent person, in compliance with general and locally applicable regulations (1.3 "Regulations"). 3.6.1 Cold water side See (A) in the installation diagram (3.5 "Installation diagram"). 1. Fit an approved stop valve (4) on the cold water side as required by the applicable regulations (1.3 "Regulations"). 2. The maximum working pressure of the water heater is 8 bar.
is 3.7 Vented water connections Warning The installation should be carried out by a competent person, in compliance with general and locally applicable regulations (1.3 "Regulations"). 3.7.1 Cold water side See (A) in the installation diagram (3.5 "Installation diagram"). 1. Fit an approved stop valve (4) on the cold water side between the cold water head tank (18) and the water heater, as required by applicable regulations. 3.7.2 Hot water side See (B) in the installation diagram (3.
3 Installation is See (D) in the installation diagram (3.5 "Installation diagram"). 1. Fit a manual gas valve (10) in the gas supply pipe. 2. Blow the gas pipe clean before use. 3. Close the manual gas valve. 4. Fit the gas supply pipe to the gas control valve. Warning After fitting, check for leaks. 3.9 Air supply and chimney flue discharge 3.9.1 Introduction This section covers the following topics: 3.9.
is Installation types Instruction manual BFC 29
3 Installation is Explanation of types of installation Installation type 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 Water heaters on common air supply and flue gas discharge (concentric and/or parallel) in multi-storey building. C53 Air supply and flue gas discharge terminal types mixed.
is Water heater with concentric flue gas discharge material IMD-0791 R0 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 Caution For type C13 and C33 installations,A.O.Smith prescribes the use of a roof or wall flue terminal, exclusively of a type approved for the water heater. Use of an incorrect roof or wall-mounted flue terminal can cause the installation to malfunction.
3 Installation is Concentric roof flue terminal specifications C33 Subject Description Roof conduit set: Art. No. • 1x roof conduit (incl. clamping ring) Manufacturer • 1x Pipe 1000 mm Type • 1x adhesive sheet BFC 28, 30, 50, 60 0311 463 1 BFC 80, 100, 120 0311 464 1 Pipe material Pipe diameters Muelink & Grol M2000 DDV HR-C Construction Concentric Flue gas discharge Thick-walled aluminium with lipped sealing ring. Air supply Thin-walled galvanised sheet steel.
is Practical example of parallel flue gas discharge Example The figure shows a BFC 30 installation. This has to be fitted with a 10 m parallel pipe of 100 mm diameter, and eight 90 degree bends. The configuration must be checked for compliance with the requirements stated in the table. Appliance with parallel flue gas discharge material For checking the maximum length, both the maximum length of the air supply and of the flue gas discharge are calculated.
3 Installation is Optionally, it is 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 water heater. For these options, see: • Isolating transformer; • Connecting a program-controlled pump; • Connecting an extra ON mode switch Note The optional components are not included in the electrical power consumption rating stated in the table (3.4.2 "General and electrical specifications"). 3.10.
is 3. Loosen the 2 screws (A) and remove the cover (B) from the electrical section. The connector block (C) is now visible. Note Consult the table for the connections and consult the electrical diagram for the electrical component connections. Terminal block Isolating transformer Mains voltage N L 1 2 primary 3 N L1 4 5 secondary 6 3.10.
3 Installation 3.10.5 is Connecting a program-controlled pump Note The maximum power capacity for a pump regulated by the controller is 100W. 1. Connect neutral (N), live (L) and earth ( ) to terminals 13, 14 and 15 as indicated in the table (3.10.2 "Preparation"). 2. Fit the cable in the strain relief. 3. If you have no more connections to make: 3.10.6 - Fit the cover on the terminal block. - Fit the covers onto the water heater.
is 3.11.1 Procedure for checking the supply pressure To check the supply pressure, proceed as follows: 1. Isolate (10.3 "Isolating the water heater from the mains") the appliance from the power supply. 2. Carefully remove the covers from the appliance. 3. The electrical section is now visible. BFC 28 to 60 4. There is a test nipple before the gas control valve (for natural gas appliances) or before the pressure-reducing valve (for LPG appliances) so that the supply pressure can be measured.
3 Installation is 7. Connect a pressure gauge to the test nipple as soon as gas starts to flow from it. 8. Switch on the power to the appliance using the isolator on the appliance. 9. Switch the controller ON by setting the 0/I switch to position I. The display will now show INTERNAL CHECK for about 10 seconds, and will then go to the main menu. INTERNAL CHECK SERVICE MENU SERVICE INTERVAL »SERVICE OPERATION È ANTI LEGIONELLA 10. Select SERVICE OPERATION, FULL LOAD from the service menu. 11.
is 3. The electrical section is now visible. 4. The gas control valve has a test nipple that can be used for measuring the gas control valve pressure. This test nipple has a sealing screw. Loosen the sealing screw by a few turns. Do not completely loosen it as it can be difficult to retighten. 5. Open the gas supply. 6. Connect a pressure gauge to the test nipple. 7. Switch on the power to the appliance using the isolator on the appliance. 8.
3 Installation is Gas control valve pressure adjustment IMD-1096b R0 3.11.3 CO2 adjustment To check the CO2 value under full load and partial load and to adjust it if necessary, proceed as follows: 1. Isolate (10.3 "Isolating the water heater from the mains") the appliance from the power supply. 2. Carefully remove the covers from the appliance. 3. The electrical section is now visible. 4.
is BFC 28 to 60 13. If necessary, adjust the CO2 value using the adjuster screw until the value is within the range listed in the table of CO2 values. Use the Allen key supplied for this. The key can be found in the plastic bag that is attached to the appliance. CO2 adjustment (full load) IMD-1095b R0 Note Turning to the left (anticlockwise) means more gas (higher CO2 level) and turning to the right (clockwise) means less gas (lower CO2 level).
3 Installation is 20. The appliance is now running at PARTIAL LOAD. Read the value from the CO2 meter and wait until this measured value has remained stable for some time. This may take several minutes. 21. Compare the CO2 value measured against the value measured under full load. Caution The CO2 value at partial load must be within ±0.3 vol% of the CO2 value measured or adjusted under full load. 22. If necessary, adjust the CO2 value using the adjuster screw until the value is within 0.
is 23. Remove the CO2 measurement probe from the measurement nipple of the flue gas outlet pipe. 24. Put the cap back on the measurement nipple of the flue gas outlet pipe. 25. Shut off the gas supply. 26. Replace the covers. 3.11.4 Switching pressure measurement To measure the switching pressure, proceed as follows: 1. Isolate (10.3 "Isolating the water heater from the mains") the appliance from the power supply. 2. Carefully remove the covers from the appliance. 3. The electrical section is now visible.
3 44 Installation is Instruction manual BFC
is 4 4.1 Introduction Conversion to a different gas category Caution The conversion may only by carried out by a competent person. If the appliance has to operate on a different family of gases (liquid petroleum gas or natural gas) or gas category other than that for which the appliance has been configured at the factory, then the appliance will have be adapted using a special conversion kit. You can order the conversion kit you need from the supplier of your appliance.
4 46 Conversion to a different gas category is Instruction manual BFC
gis 5 Filling Installation diagram Legend Vented and unvented Unused numbers are not applicable 1. 3. 4. 5. 6. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. A. B. C. D. E. H.
5 5.1 Filling unvented installations Filling gis To fill the water heater, 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). 2. 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 water heater. 5. Completely fill the water heater.
gis 6 Draining Installation diagram Legend Vented and unvented Unused numbers are not applicable 1. 3. 4. 5. 6. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. A. B. C. D. E. H.
6 6.1 Draining unvented installations Draining gis Some service activities require the water heater to be drained. The procedure is as follows: 1. Activate the MENU with . MENU »OFF ^ ON È WEEK PROGRAM 2. Position the cursor in front of OFF. 3. Confirm OFF with . 4. Wait until the fan has stopped. The icon is then dimmed. Caution Failure to wait until the fan stops can cause damage to the water heater. 5. Switch the water heater OFF (position 0) using the ON/OFF switch on the control panel. 6.
gis 7 7.1 The control panel Introduction 7.3 This chapter covers the following topics: Explanation of icons The table explains the meanings of the icons. • Control; • Explanation of icons; • ON/OFF switch on controller; Name Explanation • Navigation buttons; Heat demand Heat demand detected • PC connection. Purge Pre- and post-purge using fan 7.
7 The control panel gis The arrows ^ and È indicate that you can scroll up and/or down. Use the buttons and to scroll. MENU OFF ^»ON È WEEK PROGRAM EXTRA 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, ON, WEEK PROGRAM, EXTRA PERIOD and SETTINGS. You have to scroll down further to see the options EXTRA PERIOD and SETTINGS. The selected option is confirmed using .
gis 8 8.1 Status of the water heater Introduction This chapter covers the following topics: • Operating modes; • Error conditions; • Service condition; • Anode warning. 8.2 Operating modes When running, the water heater has four basic operating modes, namely: • OFF • ON • EXTRA • PROG 8.2.1 OFF In this mode, the frost protection is activated. The figure shows the display with the following information: 8.2.3 EXTRA In this mode, one extra period is programmed and activated.
8 Status of the water heater 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 PROG; - line two: the time, the day and T1; (9.3 "The appliance's heating cycle") - line three: the next scheduled switch-on time; - line four: displays the text PERIOD ACTIVATED. In all modes, the temperature may at any moment drop below the desired temperature. The water heater then enters an operating cycle.
gis 9 9.1 Starting the water heater Introduction This chapter covers the following topics: • Starting the appliance. • The appliance's heating cycle. 9.2 6. Confirm the selection START OPERATION with . 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"). Starting the appliance If the heating cycle is not run, there is no heat demand; if this is the case, Tset will probably need to be set (11.
9 Starting the water heater When the water heater starts, it will run through the following steps: 1. The water temperature drops below the set temperature of (for example) 65°C. The controller detects a heat demand and starts the operating cycle. - The icon is activated. - The message HEAT DEMAND appears. a ON Ê 13:45 Thursday 63ÉC Tset 65ÉC HEAT DEMAND 5. After a number of seconds pre-glow, the gas control valve is opened and ignition takes place. The icon - The message PRE PURGE appears.
gis 10 Shutting down 10.1 Introduction 10.3 Isolating the water heater from the mains This chapter describes: • Decommissioning the water heater for a short period. • Isolating the water heater from the mains; • Decommissioning the water heater for a long period. 10.2 Decommissioning the water heater for a short period To decommission the water heater for a short period, you must activate the frost protection. The frost protection will prevent water from freezing in the water heater.
10 Shutting down gis 10.5 Disposal Old end-of-life appliances contain materials that need to be recycled. When disposing of old devices that have reached the end of their service life, you should take account of local legislation relating to waste disposal. You must therefore never dispose of your old appliance together with regular waste, but should and it into a municipal waste collection depot for electrical and electronic equipment. Ask your dealer/installation engineer for advice if necessary.
gis 11 Main menu 11.1 Introduction The MENU is reached by pressing the controller. button on the MENU »OFF ^ ON È WEEK PROGRAM EXTRA PERIOD SETTINGS 11.2 Notation convention for menu-related instructions The MENU ( ) of the controller is divided into submenus. For example, SETTINGS is one of the functions reached from the main menu. The menu SETTINGS is itself divided into sub-menus. For example, LANGUAGE is a sub-menu of SETTINGS.
11 Main menu 2. Use: • to increase the value; • to decrease the value. • Confirm with .After confirming, the appliance enters "ON mode". SETPOINT » 65ÉC 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 5°C.
gis 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 respectively, the water temperature is 65ºC and the pump is switched on (P).
11 11.7.3 Main menu Week program: setting the water temperature 1. Use and to set the water temperature. In the example this is 75°C. Confirm with . The cursor moves to PUMP ON ON SU 08:15 OFF SU 12:45 Tset 75ÉC PUMP»ON SAVE 11.7.4 Week program: setting the programcontrolled pump 1. If required, a pump can be controlled during the period. Use and to set PUMP ON . The pump ensures a regular circulation of hot water in the hot water pipes.
gis 3. Proceed as follows: a. Set the switch-on time (11.7.1 "Week program: setting the switch-on time"). b. Set the 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-controlled pump"). 5. To activate the week program with the new period added, scroll down with to START OPERATION and confirm with . 11.
11 6. Scroll with Main menu to START OPERATION. Confirm with . The week program is active. 11.10 Extra period Use an extra period when you either want to have the water heater switch on and off for a certain period, either without modifying the active week program, or without taking the water heater out of OFF mode (frost protection active). If the water heater is running under an "extra period", then this is indicated in the display with the text EXTRA.
gis Setting the program-controlled pump 1. If required, a pump can be controlled during the period. Use and to set PUMP ON. 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 . The cursor moves to START. ON OFF Tset PUMP SU 08:15 SU 12:45 75ÉC ON »START 2. Confirm with 3. The cursor is positioned beside LANGUAGE Confirm with . The display shows the language selection menu.
11 Main menu 4. The cursor is positioned beside Sunday. Scroll with and to the desired day. Confirm with . The day has been set. The display shows the submenu for adjusting the time. TIME »00:00 gis 2. Scroll with to SPECIFICATIONS Confirm with . SETTINGS LANGUAGE ^ DAY/TIME È»SPECIFICATIONS The display shows the sub-menu for displaying water heater specifications. 5. The cursor moves to the hour digits, which will blink. Scroll with and example 15. to the current hour, for Confirm with .
is 12 Service program 12.1 Introduction Set the hysteresis as follows: The service program is used by the installation engineer or service and maintenance engineer for: • • Displaying the water heater history; Set the hysteresis as follows • Displaying the error history; • • Displaying the water heater history; • Display the selected water heater; • Switching the pump on or off; • Setting the service interval; • Service mode; • Setting legionella prevention.
12 Service program Call up the menu for displaying the water heater history as follows: : APPLIANCE HISTORY • The figure shows an example. APPLIANCE HISTORY BURNINGHOURS 000410 ^IGNITIONS 001000 ÈFLAME ERRORS 000021 IGNIT ERROR 000013 12.5 Display the selected water heater Call up the menu for displaying the water heater selection as follows: • : SELECT APPLIANCE The water heater number can be found on the rating plate. The water heater selection has been correctly preset in the factory.
is 3. Confirm with . • a SERVICE Ê FULL LOAD Ê Ê 47ÉC Tset 65ÉC RUNNING 4. To create a heat demand, you can temporarily raise the set point using to e.g. 70oC. a SERVICE Ê FULL LOAD Ê Ê 47ÉC Tset 70ÉC The following display appears. This display indicates that legionella prevention is switched on. a LEG Ê Ê Ê 02:45 Monday 60ÉC MO 03:00 Tset 65ÉC RUNNING 12.9.2 Changing legionella prevention start time If you wish to change the start time, select: RUNNING 5.
12 70 Service program is Instruction manual BFC
gis 13 13.1 Introduction Errors 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 (13.2 "Troubleshooting table for general errors") a table with general errors. • Displayed errors Errors are reported on the display as follows: - Line one: an error code and a brief description.
is 13.2 Troubleshooting table for general errors Warning Maintenance may only be performed by a qualified service and maintenance engineer. General errors Indication Cause Gas smell Gas leak Measure Warning Close the main gas valve at once. Warning Do not operate any switches. Remark Warning Immediately contact your installation engineer or local gas company. Warning No naked flames. Warning Ventilate the boiler room.
is Indication Cause Measure Remark Water leakage Leakage from a water connection (threaded) Tighten the threaded connection If the leak persists, consult your installation engineer Condensate leakage Check that the condensation water discharge is working properly.
is 13.3 Troubleshooting table for displayed errors Displayed errors Code + description Cause Measure S01 (blocking error) Sensor is not (correctly) Connect the sensor lead to JP3 connected See the electrical diagram (17 "Appendices"). Open circuit from temperature sensor T2 at the bottom of the tank. Damaged cable and/or Replace the cable and/or sensor.
is Code + description Cause Measure Remark S11 (blocking error) Short circuit in sensor circuit Replace the cable and/or sensor. To replace the necessary parts, you must contact your installation engineer Short circuit in sensor circuit Replace the cable and/or sensor. To replace the necessary parts, you must contact your installation engineer Short circuit in sensor circuit Replace the cable and/or sensor.
is Code + description Cause Live and neutral connected wrong way Defect in power supply around. circuit Condensation on the F01 (blocking error) flame probe Measure Remark Be sure to connect the live and neutral correctly (3.10 "Electrical connection"); the water heater is phase-sensitive See the electrical diagram (17 "Appendices"). 1. Disconnect the lead at the flame probe If errors persist, contact your installation engineer 2.
is Code + description Cause Measure Remark F03 (lock out error) Damaged wiring/Open circuit 1. Check the wiring between the pressure switch and the 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 The pressure switch fails to work correctly 2. If necessary, replace the wiring Pressure switch not closing 1. Check the speed of the fan (3.4.
is Code + description Cause Measure F04 (lock out error) No gas 1. Open the main gas supply valve and/or the manual gas supply To restore the gas supply, contact your installation engineer valve before the gas control valve Three unsuccessful ignition attempts. Remark 2. Check supply pressure to the gas control valve 3. If necessary, restore the gas supply Air in the gas pipes Bleed the air out of the gas pipe (3.
is Code + description Cause Measure Remark F06 (blocking error) Damaged cable in contact with metal surface or bent flame probe. Check the wiring and the flame probe. Replace the wiring and/or flame probe if necessary. If the error persists, contact your installation engineer. To replace the necessary parts, you must contact your installation engineer Ceramic part of the flame probe is broken/cracked. 1.
is Code + description Cause Measure Remark C02 (lock out error) Incorrect reference voltage from the AD converter. 1. Reset controller. To replace the necessary parts, you must contact your installation engineer Error message from the controller. Internal error message • from the controller. EEPROM read error • 50 Hz error • Internal communication error Internal error message • from the controller.
is Code + description Cause E01 (blocking error) The temperature of the None. This is a temporary message that may appear from time to water at the top of the time, but will disappear automatically. tank is >88oC. The temperature protection at the top of the tank has been activated. E03 (lock-out error) Error in temperature sensor T1 at the top of the tank. E04 (lock-out error) Defect in the dummy sensor(2). Measure Remark The two temperature 1. Check sensor position and wiring.
is 13.4 Warnings on the display Warnings on the display Indication Cause Measure Remark Maximum burning hours: Service required. The actual burning hours have exceeded the preset burning hours. Water heater runs, but displays a warning For maintenance to your water heater, please contact your installation engineer. Anode protection not working. • • • Instruction manual BFC The cables Water heater runs, but displays a warning. 1. Connect the wiring correctly and the warning will disappear.
is 14 14.1 Introduction Service interval A service should be carried out at least once a year, both on the water side and on the gas side. Among other things, the service interval depends on the water quality, the average burning time per day and the set water temperature. Note Regular maintenance extends the service life of the water heater.
14 84 Service interval is Instruction manual BFC
s 15 15.1 Introduction Performing maintenance Caution Maintenance may only by carried out by an approved service and maintenance engineer. At each service, the water heater 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.
15 Performing maintenance s 6. Switch the controller ON by setting the ON/OFF switch to position I. INTERNAL CHECK The display will now show INTERNAL CHECK for about 10 seconds, and will then go to the main menu. MENU »OFF ^ ON È WEEK PROGRAM 7. Activate "ON mode" by going through the following steps: - Press once on the blue arrow ( ) to position the cursor beside ON, then press . - Confirm the selection START OPERATION with . 8. If there is no heat demand, then raise (11.
s Take the rate of scale formation into account when deciding on the service interval. 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 the prevention of excessive scale build-up. 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).
15 Performing maintenance 15.4.3 s Clean heat exchanger 1. Detach the burner. 2. Clean the combustion chamber of the heat exchanger using a vacuum cleaner and a soft brush. 3. Detach the chimney flue. 4. Clean the end of the heat exchanger using tap water. 5. Fit the burner. 6. Fit the chimney flue. Note Check the pressure differential again after cleaning. If the pressure differential is too low following cleaning, please contact the supplier of the water heater. 15.
gis 16 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 an appliance supplied by A.O.Smith Water Products Company B.V. of Veldhoven, Netherlands (hereinafter "A.O.Smith") the right to the warranty set out below, defining the commitments of A.O.Smith to the owner. 16.1 General warranty If, after verification and at the sole discretion of A.O.
16 Warranty (certificate) i. 16.4 Exclusions gis The water heater 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 power 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.
is 17 17.1 Introduction Instruction manual BFC Appendices This appendix contains: • Menu structure (17.2 "Menu structure") • Electrical diagram (17.3 "Electrical diagram") • Declaration of conformity (17.4 "Declaration of conformity") • Week program card (17.
17 Appendices is 17.
is Instruction manual BFC 93
17 Appendices 17.
is TERMINAL BLOCK CONNECTIONS: CONTROLLER CONNECTIONS: Earth J2 Power connection for controller N Neutral J19 Extra error signal connection L Live input of controller J20 Gas control valve connection L1 Phase input of isolating transformer (primary side) J21 Program-controlled pump connection J40 Fan connection Phase output of isolating transformer (secondary side) J36 Controller display connection JP2 Flame probe and hot surface igniter connection L2 L3 Phase input of program-contr
17 17.
17.5 Week program card You can cut the week program card out and keep it near the water heater. Period DAY TIME ON 1. OFF ON 2. OFF ON 3. OFF ON 4. OFF ON 5. OFF ON 6. OFF ON 7. OFF ON 8. OFF ON 9. OFF ON 10. OFF ON 11. OFF Period Tset Pump ....°C ON / OFF 12. ....°C ON / OFF 13. ....°C ON / OFF 14. ....°C ON / OFF 15. ....°C ON / OFF 16. ....°C ON / OFF 17. ....°C ON / OFF 18. ....°C ON / OFF 19. ....°C ON / OFF 20. ....°C ON / OFF 21. ....
Instruction manual BFC 98
gis Index A J actuation 59 ambient conditions 17 ambient temperature 18 join air supply 28 circulation pipe 26, 27 cold water side 26, 27 electrical 33 flue gas discharge 28 gas 27 hot water side 26 C claims 90 connecting the air supply 28 connecting the chimney flue 28 connecting the circulation pipe 26, 27 connecting the cold water side 26, 27 connecting the hot water side 26 conversion to a different gas category 45 D L language setting 65 liability 3 M descaling 86 displaying error history 67 docu
Index T W target groups 10 terminal block 34 ThermoControl ON/OFF switch 51 trademarks 3 U user 10 0311 704 1.
