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A.O. Smith BFC -100 - page 1
XTRA HIGH EFFICIENCY XTRA HIGH EFFICIENCY 80 100 80 100 W A TER PRODUCTS COMP ANY W A TER PRODUCTS COMP ANY A DIVISION OF A. O. SMITH CORPORAT ION A DIVISION OF A. O. SMITH CORPORAT ION W A TER PRODUCTS COMP ANY A DIVISION OF A. O. SMITH CORPORAT ION Installation User and Service Manual Installation User and Service Manual Installation User and Ser ...
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A.O. Smith BFC -100 - page 2
www .aosmithinternational.com your inst aller ...
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A.O. Smith BFC -100 - page 3
Instruction manual BFC 3 gis Read this manual carefully Wa rn i n g 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 dama ge to the appliance. Copyright © 2008 A.O. Smith water Product s Comp any All rights reserve ...
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A.O. Smith BFC -100 - page 4
4 Instruction manual BFC gis ...
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A.O. Smith BFC -100 - page 5
Instruction manual BFC 5 T able of content s 1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.1 About the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.2 What to do if you smell gas - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.3 Regulations - - - - - - - - - - - - - - - - - - - - - - - - - - ...
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A.O. Smith BFC -100 - page 6
Table of contents 6 Instruction manual BFC 9 Starting and runnin g - - - - - - - - - - - - - - - - - - - - - - 53 9.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5 3 9.2 Starting and running - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53 9.3 The appliance's heating cycle - - - - - - - - - - - - - - ...
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A.O. Smith BFC -100 - page 7
Instruction manual BFC 7 16.3 Conditions for Installation and use - - - - - - - - - - - - - - - - - - - - 87 16.4 Exclusions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 88 16.5 Scope of the warranty - - - - - - - - - - - - - - - - - - - - - - - - - - 88 16.6 Claims - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ...
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A.O. Smith BFC -100 - page 8
Table of contents 8 Instruction manual BFC ...
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A.O. Smith BFC -100 - page 9
Instruction manual BFC 9 gis 1 Introduction 1.1 About the appliance This manual describes how to install, service and use the BFC appli ance. The BFC appliance is a condensing water hea ter with a fan in the air intake. The BFC can be installed as either an open or room-sealed applian ce. A concentric chimney connector is fitted standard to the app ...
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A.O. Smith BFC -100 - page 10
Introduction 10 Instruction manual BFC 1 gis Furthermore, the installation must c omply with the ma nufacturer's instructions. Note Later amendments and/or additions to all regulations, requi rements and guidelines published on or prio r to the moment of installing, will apply to the installation. 1.4 T arget group s The three target groups fo ...
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A.O. Smith BFC -100 - page 11
Instruction manual BFC 11 gis 1.7 Overview of this document The table provides an o verview of the co ntents of this document. Contents of this document Chapter T arget group s Description Worki ng principle of the appliance This chapter describes how the applian ce functions. Installation This chapter describes the installation acti vity to be com ...
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A.O. Smith BFC -100 - page 12
Introduction 12 Instruction manual BFC 1 gis ...
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A.O. Smith BFC -100 - page 13
Instruction manual BFC 13 gis 2 W orking principle of the appliance 2.1 Introductio n T opics covered in this chapter: • General working princi ple of the appliance ; • The appliance's heating cycl e ; • Protection for the appliance ; • Safety of the inst allation . 2.2 General working principle of the appliance The figure shows a cut- ...
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A.O. Smith BFC -100 - page 14
Working princi ple of the applian ce 14 Instruction manual BFC 2 gis The appliance is equipped with a ga s/air pr emix burner (17) . The air is drawn in through the fan (18). The gas is suppl ied via the gas control (16) on the intake side of the fan. The gas/air mixture is the n blown into the burner . The modu lated supply of gas and air ensures ...
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A.O. Smith BFC -100 - page 15
Instruction manual BFC 15 gis •t h e Pre ssure sw itch ; •t h e Flame probe . 2.4.2 Water temperatu re protect ion The electronic controll er uses temperat ures se nsors T1 (7) and T2 (13) to monitor three temperatures that are impo rtant for safety . The table explains the functioning of the temperature sensors. T emperature protection 2.4.3 G ...
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A.O. Smith BFC -100 - page 16
Working princi ple of the applian ce 16 Instruction manual BFC 2 gis 2.4.6 Flame probe T o ensu re that no gas can flow when there is no combustion, the water heater is fitted with a flame probe (21). The el ectronic controller uses this probe to detect the presence of a flame, by means of ionisation dete ction. The electronic controller closes the ...
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A.O. Smith BFC -100 - page 17
Instruction manual BFC 17 is 3 Inst allation Wa r n i n g Installation work should be carried o ut by an approved installation e ngineer in compliance with the general and local reg ulations 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 st ...
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A.O. Smith BFC -100 - page 18
Installation 18 Instruction manual BFC 3 is 3.3.1 Air humidity and ambient temperature The boiler room must be frost-free, or be protected aga inst frost. The table shows the environmental conditions that must be adhere d to for correct functioning of the electronics presen t in the appliance to be guaranteed. Air humidity and ambient temperature s ...
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A.O. Smith BFC -100 - page 19
Instruction manual BFC 19 is Working clearance s 3.4 T echnical specifications The appliance is supplied without a ccessories. Check the dimensions (3.4.1 "D imensions of the appliance") , g as data (3.4.3 "Gas data") and other specifications (3.4.2 " General and electrical specificati ons") of any accessories you plan ...
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A.O. Smith BFC -100 - page 20
Installation 20 Instruction manual BFC 3 is 3.4.1 Dimensions of the appliance Plan and elevation of appliance (le gend: see the table) 45º 18º 45º 3 5 4 F E 2 6 11 º Hy Hx C Ny D 2 5 P M 6 1 4 R S N A G 7 K W H 3 IMD- 0 22 0 R4 ...
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A.O. Smith BFC -100 - page 21
Instruction manual BFC 21 is Dimensions (all measurements in mm unless otherwise indicated) 3.4.2 Ge neral and electrical specificat ions General and electrical specifications Dimen sion Description BFC 80 BFC 100 A T ot al height 2060 2060 C Position on pallet 530 530 D Appliance diameter 850 850 E Depth 1000 1000 F Wid th 900 900 G Diameter of fl ...
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A.O. Smith BFC -100 - page 22
Installation 22 Instruction manual BFC 3 is 3.4.3 Gas dat a Gas data Description II 2H3P Unit BFC 80 BFC 100 Natural gas Gas category G20-20 mba r Orifice diameter mm 6.30 6.80 Nominal load (gro ss calorific value) kW 86.6 105.5 Nominal output kW 81.9 99.8 Supply pressure mbar 20 20 Burner pressure mbar 7.0 6.0 Gas cons umption (*) m 3 /h 8.3 10.1 ...
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A.O. Smith BFC -100 - page 23
Instruction manual BFC 23 is 3.5 Inst allation diagram Installation diagram Legend Only applicable numbers are mentioned. 1. pressure reducing valve (mandatory) 3. T&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 ...
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A.O. Smith BFC -100 - page 24
Installation 24 Instruction manual BFC 3 is 3.6 Water connec tions, Ve n t e d Wa r n i n g The installation should be carrie d out by an authorised installation engineer, in compliance with general and local regulations (1.3 "Regulations") . 3.6.1 Cold water side See (A) in the installation diagram (3.5 "Installation diagram") ...
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A.O. Smith BFC -100 - page 25
Instruction manual BFC 25 is 3.7 W ater connections, Unvented Wa r n i n g The installation should be carried out by an authorised installation engineer , in compliance with general and local regulatio ns (1.3 "Regulations") . 3.7.1 Col d water side See (A) in the installation diagram (3.5 "Inst allation diagr am") . 1. Fit an a ...
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A.O. Smith BFC -100 - page 26
Installation 26 Instruction manual BFC 3 is 3.8 Gas c onnectio n Wa r n i n g The installation should be carrie d out by an authorised installation engineer, in compliance with general and local regulations (1.3 "Regulations") . Caution Make sure that the diameter and lengt h of the gas supply pipe are large enough to supply sufficient ca ...
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A.O. Smith BFC -100 - page 27
Instruction manual BFC 27 is T ypes of appliances IMD-0468 R0 C43 C13 C53 B23 C33 ...
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A.O. Smith BFC -100 - page 28
Installation 28 Instruction manual BFC 3 is Explanation of type of appliance Note Make sure that the chimney discharges into an are a where this is permitted for this category of appliance. 3.9.3 Concentric connections The table shows the requirem ents for concentric systems. Wa r n i n g Install flue gas discharge pipe runs with a run-off of 5 mm ...
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A.O. Smith BFC -100 - page 29
Instruction manual BFC 29 is Appliance with concentric flue gas discharge material According to the table, the maximu m length allowed is 15 metres, and there may be up to three 90° bends. Both requirements are fulfilled. Specifications Caution For type C13 and C33 installations,A.O. Smith prescribes the use of a roof or wall-mounted termin al, ex ...
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A.O. Smith BFC -100 - page 30
Installation 30 Instruction manual BFC 3 is Concentric wall flue termina l specifications C13 Concentric roof flue terminal specifications C33 Subject Desc ription W all flue terminal set: • 1x wall flue terminal (incl. wall flange & clamping ring) • 1x pipe 500mm • 1x bend 90° Item No. 0302 326 1 Construction Concentric Manufacturer Mue ...
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A.O. Smith BFC -100 - page 31
Instruction manual BFC 31 is 3.9.4 Para llel connec tions The table st ates the maxi mum pipe lengths fo r parallel systems. The maximum pipe length dep ends on the chosen diamete r . Wa r n i n g Install flue component pipe runs with a run-off of 5 mm per metre. T able of pipe lengths Y ou must use the longest pipe when calcul ati ng the pipe leng ...
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A.O. Smith BFC -100 - page 32
Installation 32 Instruction manual BFC 3 is Appliance with parallel flue gas discharge material The longest pipe must be used to check the maximum length. In this case, the chimney pipe is the longest. This is 35 metr es. This 35 metres is the sum of pipe sections 1, 2, 3, 4 and 5. The length of the transitio n piece can be ignored. T he total numb ...
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A.O. Smith BFC -100 - page 33
Instruction manual BFC 33 is Optionally , it is possible to connect an is olating 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: • Isolating transformer ; • Connecting a program-controlle d pump ; • Connecting an extra ON mode switch (&quo ...
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A.O. Smith BFC -100 - page 34
Installation 34 Instruction manual BFC 3 is In preparation, you must first remove the two plastic covers and the protective cap of the electrical section. 1. Undo the screws of the plastic covers. 2. Carefully remove the covers from the applian ce. The electrical secti on is now visible. 3. Loosen the 2 screws (A) of the electric al section, and re ...
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A.O. Smith BFC -100 - page 35
Instruction manual BFC 35 is 4. If you have no more connections to make: - Fit the cap on the electrical te rminal block. - Fit the plastic covers onto the applianc e. 5. Connect the power cable to the isolato r . 3.10.5 Connecting a pr ogram-controlled pump 1. Connect phase (L), neutral (N) and earth ( ) to termina ls 10, 1 1 and 12 as stated in t ...
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A.O. Smith BFC -100 - page 36
Installation 36 Instruction manual BFC 3 is Gas control 3.1 1 .1 Preparation T o check the suppl y pressure and burner pressure, proceed as follows: 1. Isolate (10.3 "Electrically i solating the appliance") t he water heater fro m the power supply . 2. Undo the screws of the plastic covers. 3. Carefully remove the covers from th e top of ...
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A.O. Smith BFC -100 - page 37
Instruction manual BFC 37 is The display will now show INTERNAL CHECK for about 10 seconds and go to the main me nu. 7. Activate the "ON mode" by going th rough the following steps: - Press the blue arrow on ce ( ) to position the cursor in front of ON and press . The display shown here wil l appear . - Confirm th e by pressing START OPER ...
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A.O. Smith BFC -100 - page 38
Installation 38 Instruction manual BFC 3 is 3.1 1.3 Adjusting the pressure 1. Remove the ca p (4) from the burner pressure regulator (3). 2. Correct the burner pressure by turning the adjusting screw (5), depen ding on the correction required: - Adjustment screw anticlockwise: burne r pressure decreases. - Adjustment screw clockwise: burner pressur ...
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A.O. Smith BFC -100 - page 39
Instruction manual BFC 39 is 4 Conversion to a different gas category Caution 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 th at for which the appliance has been set at the factory , the appliance will have be ad ...
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A.O. Smith BFC -100 - page 40
Conversion to a differen t gas category 40 Instruction manual BFC 4 is 5. Detach the 3-part gas coupling (2) adjacent to the burner . 6. Select and fit the correct orifice from the conversion kit, based on the gas table (3.4.3 "Gas data") . The inj ector diameter i s stamped int o each injector (6). 7. Refit the 3-part gas coupling (2). 8 ...
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A.O. Smith BFC -100 - page 41
Instruction manual BFC 41 gis 5 Filling Installation diagram Legend Only applicable numbers are mentioned. 1. pressure reducing valve (mandatory) 3. T&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) 1 ...
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A.O. Smith BFC -100 - page 42
Filling 42 Instruction manual BFC 5 gis 5.1 Filling the appliance 5.1.1 Filling unvented installations T o fill the app liance, proceed as follo ws: 1. Open the stop valve (1 1) in the hot wate r pi pe and, if present, the stop valves (4) for the circulation pump (6). 2. Close the drain valve (9). 3. Open the nearest hot wate r draw-off point (14). ...
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A.O. Smith BFC -100 - page 43
Instruction manual BFC 43 gis 6 Draining Installation diagram Legend Only applicable numbers are mentioned. 1. pressure reducing valve (mandatory) 3. T&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) 1 ...
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A.O. Smith BFC -100 - page 44
Draining 44 Instruction manual BFC 6 gis 6.1 Draining unvented inst allations 1. Activate the MENU with . 2. Position the cu rsor in front of OFF . 3. Confirm OFF with . 4. W ait until the fan has stopp ed. The symbol is then dimmed. Caution Failure to wait until the fan stop s purging can cause damage to the appliance. 5. Switch the appliance OFF ...
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A.O. Smith BFC -100 - page 45
Instruction manual BFC 45 gis 6. Isolate the water heater from the power supply by putting the isolator between the appliance and th e mains power supply to position 0. 7. Shut off the gas supply (10). 8. Close the stop valve (1 1) in the hot water pipe. 9. Close the stop valve (4) between the water tank and the cold water inlet (A). 10. Open the d ...
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A.O. Smith BFC -100 - page 46
Draining 46 Instruction manual BFC 6 gis ...
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A.O. Smith BFC -100 - page 47
Instruction manual BFC 47 gis 7 The control p anel 7.1 Introductio n T opics covered in this chapter: • Controls ; • Meaning of ico ns ; • Electronic controller ON/OFF switch ; • Navigation buttons ; • PC connection . 7.2 Controls <The entire ap pliance is controlled (and monitored) by the ThermoControl (electronic contro ller).The fig ...
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A.O. Smith BFC -100 - page 48
The control pane l 48 Instruction manual BFC 7 gis • Buttons for UP , and DOWN ; • Enter: ; • Reset button: . The ^ arrows and È indicate that you can scroll up and/or down. Use the buttons and to scroll. The cursor » points to the option to be activated. In the display as shown in the figure, you can scroll th rough the main menu. The main ...
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A.O. Smith BFC -100 - page 49
Instruction manual BFC 49 gis 8 S t atus of the appliance 8.1 Introductio n T opics covered in this chapter: • Operating modes ; • Error conditions ; • Service con dition . 8.2 Operating modes When running, the applian ce has four basic operating modes, namely: • OFF • ON • EXTRA • PROG 8.2.1 OFF In this mode, the fro st protection is ...
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A.O. Smith BFC -100 - page 50
Status of the app liance 50 Instruction manual BFC 8 gis 8.2.4 PROG In this mode a preset week program is active, and the appliance responds con tinually to dema nd within the time periods set in the week prog ram. There are two distinct situations possible in this mode: 1. The current time falls within a set time period of the week program. The fi ...
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A.O. Smith BFC -100 - page 51
Instruction manual BFC 51 gis 8.4 Service condition The figure shows th e message SERVICE REQUIRED .Should this message a ppear , then the appliance is in need of a service and maintenance inspection. In th at case, contact your service and maintenance engine er . Note The message SERVICE REQUIRED is based on the number of expired bur n ing hours a ...
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A.O. Smith BFC -100 - page 52
Status of the app liance 52 Instruction manual BFC 8 gis ...
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A.O. Smith BFC -100 - page 53
Instruction manual BFC 53 gis 9 S t arting and running 9.1 Introductio n T opics covered in this chapter , in sequence: • S tarting and running . • The appliance' s heating cycle . 9.2 St arting and runn ing S tart the appliance as follows: 1. Fill the appli ance (5 "Filling") . 2. Open (3.5 "Installation diagram") the ...
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A.O. Smith BFC -100 - page 54
Starting and ru nning 54 Instruction manual BFC 9 gis Once the appliance starts, it will run through the following steps: 1. The water temperature drops below the set temperature of (for example) 65 °C. The electronic controller detects a dema nd and starts the heating cycle. - The icon is activated. - The message HEAT DEMAND appears. 2. Once dema ...
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A.O. Smith BFC -100 - page 55
Instruction manual BFC 55 gis 10 Shutting down 10.1 Introductio n This chapter describes: • Shut the appliance down for a brief peri od ("OFF mode") ; • Electrically isolating th e appliance ; • Shutting the a ppliance down for a long period . 10.2 Shut th e appliance down for a brief period ("OFF mode") T o shut th e appl ...
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A.O. Smith BFC -100 - page 56
Shutting down 56 Instruction manual BFC 10 gis ...
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A.O. Smith BFC -100 - page 57
Instruction manual BFC 57 gis 1 1 Main menu 1 1.1 Not ational convention for menu- related instructions The MENU ( ) of the electronic controller is d ivided into submenus. For example, SETTINGS is one of the functions reached from the mai n menu. The SETTINGS menu is divided into submenus in turn. For example, LANGUAGE is a submenu of SETTINGS . S ...
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A.O. Smith BFC -100 - page 58
Main menu 58 Instruction manual BFC 11 gis The appliance's default wee k 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 ...
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A.O. Smith BFC -100 - page 59
Instruction manual BFC 59 gis Confirm with . The cursor moves to the minute digi ts, which flash . Note Because the switch-off time can never be earlier than the switch-on time, th e switch-off time setting is automati cally adjusted wit h the switch-on ti me. 4. Use and to set the minutes. In the example, this is 15 . Confirm with . The cursor mov ...
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A.O. Smith BFC -100 - page 60
Main menu 60 Instruction manual BFC 11 gis The display shows the menu for the week program. The cursor points to the active period. 2. Scroll to INSERT . Confirm with . The sub-menu for adding a period will appea r . Example As an example, we will program an extra period in which the switch-on time i s set to 18:00 hours, and the corresponding swit ...
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A.O. Smith BFC -100 - page 61
Instruction manual BFC 61 gis Confirm with . 5. The lines showing switch-on/off times are replaced by the text DELETE BLOCK? . See the figure. Confirm with . (or use to cancel) The switching period h as been deleted. Y ou will return now to the week program menu. The cursor points to the first programmed period. 6. Scroll with to START OPERATION . ...
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A.O. Smith BFC -100 - page 62
Main menu 62 Instruction manual BFC 11 gis Setting the sw itch-off time 1. Use and to set the hours. In the example, this is 012 . Confirm with . The cursor moves to the minute digits, which flash. 2. Use a nd to set the minutes. In the e xample, this is 45 . Confirm with . The cursor moves to the water temperature. See the figure Setting the wate ...
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A.O. Smith BFC -100 - page 63
Instruction manual BFC 63 gis 1 1.1 1.2 Setting day and time T o enter the time and da y: 1. Call up the menu for en tering the day and time as follows: 2. : SETTINGS . Confirm with . The display shows the menu for settings. 3. Scroll with and to DAY / TIME Confirm with . The display shows the sub-menu for adju sting the day . 4. The cursor is posi ...
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A.O. Smith BFC -100 - page 64
Main menu 64 Instruction manual BFC 11 gis The relevant display appears. REGULATION INTERV AL 40 _ 80ÉC ...
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A.O. Smith BFC -100 - page 65
Instruction manual BFC 65 is 12 Service program 12.1 Introductio n The service program i s used by the installation engineer or servi ce and maintenance engineer for: • Setting the hysteresis ; • Displaying the error history ; • Displaying the appliance history ; • Display the selected appliance ; • Switching the pump on or off ; • Sett ...
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A.O. Smith BFC -100 - page 66
Service program 66 Instruction manual BFC 12 is 12.4 Displaying the applia nce history The appliance history submenu is used to display the burning hours, the nu mber of ignitio ns, the number of flame errors and the number of ignition errors. Call up the menu for displaying th e appliance history as follows: •: APPLIANCE HISTOR Y The figure show ...
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A.O. Smith BFC -100 - page 67
Instruction manual BFC 67 gis 13 T roubleshooting 13.1 Introduct ion A distinction is made between: • General errors General errors are not reported on the displa y . General errors are: - Gas smell - Display does not light up - Insufficient or no hot water . - Water leakage - Explosive ignition. The manual include s a table with general errors ( ...
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A.O. Smith BFC -100 - page 68
is Instruction manual BFC 68 13.2 T roubleshooting t able for general errors Wa r n i n g Maintenance may only be perfo rmed by a qualified service and mai ntenance engineer . General erro rs Symptom Cause Solution Remark Gas smell Gas leak Wa r n i n g Close the main gas valve immediately . Wa r n i n g Do not operate any switches. Wa r n i n g No ...
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A.O. Smith BFC -100 - page 69
is Instruction manual BFC 69 W ater leakage Leakage from a water connection (threaded) T ighten the threaded connection If the leak persists, consult your installation engineer Condensate leakage Check that the condensation water discharge is working properly . Rectify if necessary Leakage from another nearby water appliance or pipe segment T race ...
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A.O. Smith BFC -100 - page 70
is Instruction manual BFC 70 13.3 Displa yed errors Code + Descripti on Cause Solution Re mark S01 (blocking error) Open circuit from temperature sensor T2 at bottom of the tank Sensor is not (correctly) connected Connect the sensor lead to JP3 See the BFC electrical di agram (17 "Appendices") Damaged cable or defective sensor Replace the ...
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A.O. Smith BFC -100 - page 71
is Instruction manual BFC 71 S12 (blocking error) Short circuit in sensor 1 of temperature sensor T 1 at the top of the tan k (1) Short circuit in sensor circuit Replace sensor T 1 T o replace the nece ssary parts, you must cont act your in stallation engineer S13 (blocking error) Short circuit in sensor 2 of temperature sensor T1 at the top of the ...
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A.O. Smith BFC -100 - page 72
is Instruction manual BFC 72 F02 (lock out error) Fan fails to run at correct speed. Defective motor and/or rotor . 1. Check the motor and rotor 2. Replace the fan if the motor or rotor is defective. 3. Reset appliance controlle r See the BFC electrical di agram (17 "Appendices") T o have the wiring replaced and a new fan fi tted, you mus ...
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A.O. Smith BFC -100 - page 73
is Instruction manual BFC 73 Air pressure switch fails to close during pre- purge. Air pressure switch leads 1. Check the wiring between th e air pressure switch and the controller . Rectify any defect: - if any wires are damaged, repl ace the wiring harness - properly connect loose or detached hoses 2. Reset appliance controlle r Loose air pressur ...
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A.O. Smith BFC -100 - page 74
is Instruction manual BFC 74 Fan speed too low 1. Check the fan speed 2. If the fan speed is too low , check the settings 3. If the settings are correct, then replace th e fan. 4. Modify the settings if in correct 5. Reset appliance controlle r Dif ferential air pressure switch not closing during pre-purge DAPS leads 1. Check the wiring betwe en th ...
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A.O. Smith BFC -100 - page 75
is Instruction manual BFC 75 F03 (lock out error) The pressure switch fails to work correctly Damaged wiring/Open circuit 1. Check the wiring between th e pressure switch and the controller 2. If necessary , repla ce the wiring If the error cannot be resolved or is persistent, contact your installation engineer T o replace the necessary parts, you ...
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A.O. Smith BFC -100 - page 76
is Instruction manual BFC 76 F04 (lock out error) Three unsuccessful ignition attempts. No g as 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 T o repair the gas supply , contact your installation engineer Air in the gas pi pe ...
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A.O. Smith BFC -100 - page 77
is Instruction manual BFC 77 F06 (lock out error) Short circuit between flame probe and earth Damaged cable in contact with metal surface. Check the wiring of the flame pr obe. If necessary , repl ace the wiring. If the error persists, contact your inst allati on engineer . T o replace the necessary parts, you must contact your installation enginee ...
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A.O. Smith BFC -100 - page 78
is Instruction manual BFC 78 F10 (lock out error) Restriction on the number of ig nition attempts based on pressure switch state changes. Pressure switch not closing 1. Check th e running speed of the fan (12.5 "Display the selected appliance") 2. Check that the hoses on the pr e ssure switch and the air supply hose between fan and burner ...
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A.O. Smith BFC -100 - page 79
is Instruction manual BFC 79 C02 (lock out error ) Error message from the appliance controller . Incorrect reference voltage from the AD converter . 1. Reset electronic co ntroller . 2. Check that the frequency of the power supply is compliant (3.4.2 "General and electrical specifications") . If this is not the case, contact your installa ...
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A.O. Smith BFC -100 - page 80
is Instruction manual BFC 80 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 > 85 o C. None. This is a temporary message that may appear from time to time, but will disapp ear automatically . E03 (lock-out error ) Error in temperature sensor T 1 at ...
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A.O. Smith BFC -100 - page 81
Instruction manual BFC 81 is 14 Maintenance frequency 14.1 Introductio n A service should be carried ou t at least once a yea r , b oth on the water side and on the gas side. Maintenance fre quen cy depends, among other things, on the water quality , the average bu rning time per da y and the se t water temperature. Note Regular maintenance extends ...
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A.O. Smith BFC -100 - page 82
Maintenance frequency 82 Instruction manual BFC 14 is ...
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A.O. Smith BFC -100 - page 83
Instruction manual BFC 83 s 15 Performing maintenance 15.1 Introductio n Cautio n Maintenance may only be performed by a qualified servi ce and maintenance engineer . At each service, the appliance unde rgoes maintenan ce on both the water side and the gas side. The maintena nce must be carried out in the fo llowing order . 1. Preparation for maint ...
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A.O. Smith BFC -100 - page 84
Performing maintenance 84 Instruction manual BFC 15 s 6. Switch the electronic controlle r ON by setting the ON/OFF switch to position I . The display will now show INTERNAL CHECK for about 10 seconds, and will then go to the main menu. 7. Activate "ON mode" by going through the following steps: - Press once on the blue arrow ( ) to po si ...
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A.O. Smith BFC -100 - page 85
Instruction manual BFC 85 s 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 ). 15.3 W ater-side maintenance 15.3.1 Introd uction The following steps must be carried out on the water side: 1. Checking the anodes . 2. Descaling and cleaning the ta ...
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A.O. Smith BFC -100 - page 86
Performing maintenance 86 Instruction manual BFC 15 s 6. Close the cleaning op ening. T o avoid damage to the tank, tighten the bolts that fasten the lid with a to rque no gr eater than 50 Nm. Use suitable tools for this. 15.3.4 Cleaning condensation wate r discharge Regular cleaning of the condensatio n drain and siphon is essential for prevention ...
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A.O. Smith BFC -100 - page 87
Instruction manual BFC 87 gis 16 W arranty (certificate) T o register your wa rranty , you shou ld complete and return the enclo sed warranty card after which a wa rranty ce rtificate will be se nt to you. This certificate gives the owner o f a applianc e supplied by A.O. Smith water Products Company B.V . of V eldhoven, The Ne ther lands (hereinaf ...
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A.O. Smith BFC -100 - page 88
Warranty (certificate) 88 Instruction manual BFC 16 gis i. The appliance is at all time s fitted with cathodic protection. If sacrificial anodes are used for this, these must be replaced and renewed whe n, and as soon as, they are 60% or mo re consumed. When e lectric anodes are used, it is important to ensure that they continue to work properly . ...
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A.O. Smith BFC -100 - page 89
Instruction manual BFC 89 is 17 Appendices 17.1 Introductio n This appendix contains: • Electrical diagram (17.2 "BFC Electrical Diagram.") • Week program card ...
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A.O. Smith BFC -100 - page 90
Appendices 90 Instruction manual BFC 17 is 17.2 BFC Electrical Diagram. 1 = brown, 2 = blue, 3 = green, 4 = black, 5 = white, 6 = grey/beige, 7 = red, 8 = g reen ...
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A.O. Smith BFC -100 - page 91
Instruction manual BFC 91 is TERMINAL BLOCK CONNECTIONS: Earth N Neutral L P hase input of controller L 1 Phase output of isolating transformer (secondary side) L 2 Phase input of isolating transfor mer (primary side) L 3 Phase input of program-controlled pump L 4 Live input of frequency controller L 5 Phase input of continuous pump COMPONENTS: A C ...
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A.O. Smith BFC -100 - page 92
Appendices 92 Instruction manual BFC 17 is ...
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A.O. Smith BFC -100 - page 93
Instruction manual BFC 93 17.3 W eek program card Y ou can cut the week program card out and keep it near the appliance. Example Period DA Y TI ME T set Pump 1. ON ....°C ON / OFF OFF 2. ON ....°C ON / OFF OFF 3. ON ....°C ON / OFF OFF 4. ON ....°C ON / OFF OFF 5. ON ....°C ON / OFF OFF 6. ON ....°C ON / OFF OFF 7. ON ....°C ON / OFF OFF 8. ...
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A.O. Smith BFC -100 - page 94
Instruction manual BFC 94 ...
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A.O. Smith BFC -100 - page 95
Instruction manual BFC 95 Index A ambient temperature 18 appliance displaying history 66 displaying selection 66 general working principle 13 heating cycle 14 protection 14 types 9, 17 B burner pressure 35 C claims 88 connect 24, 25 air supply 26 Alarm OUT 35 circulation piping 24, 25 cold water side 24, 25 condensation drainage 24, 25 electrical 3 ...
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A.O. Smith BFC -100 - page 96
0308 454 4.2 UK Index Instruction manual BFC mode ERROR 50 EXTRA 49 HEAT DEMAND 53 IGNITION 53 OFF 49 ON 49 POST-PURGE 53 PRE-GLOW 53 PRE-PURGE 53 PRESSURE SWITCH 53 PROG 50 RUNNING 53 SERVICE REQUIRED 51 N navigation buttons 47 O off 49 on 49 ON mode 57 on/off switch 47 operating modes EXTRA 49 general 49 OFF 49 ON 49 PROG 50 P packaging 17 PC con ...
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