Page 2 - your installer
Page 3 - gis; Read this manual carefully; Trademarks
Instruction manual BFC 3 gis Read this manual carefully 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 © 2008 A.O. Smith w...
Page 5 - Table of contents
Instruction manual BFC 5 Table of contents 1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.1 About the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.2 What to do if you smell gas - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.3 Regulations - - ...
Page 9 - Introduction; About the appliance; Regulations
Instruction manual BFC 9 gis 1 Introduction 1.1 About the appliance 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 ...
Page 10 - Target groups; Maintenance
Introduction 10 Instruction manual BFC 1 gis 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 T...
Page 15 - Gas valve
Instruction manual BFC 15 gis • the Pressure switch ; • the Flame probe . 2.4.2 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 senso...
Page 16 - Flame probe
Working principle of the appliance 16 Instruction manual BFC 2 gis 2.4.6 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 det...
Page 17 - is; Installation
Instruction manual BFC 17 is 3 Installation 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 roo...
Page 18 - Air humidity and ambient temperature; Maximum floor load; Water composition; Working clearances
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 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 gua...
Page 20 - Dimensions of the appliance
Installation 20 Instruction manual BFC 3 is 3.4.1 Dimensions of the appliance Plan and elevation of appliance (legend: see the table) 45º 18º 45º 3 5 4 F E 2 6 11º Hy Hx C Ny D 2 5 P M 6 1 4 R S N A G 7 K W H 3 IMD-0220 R4
Page 24 - Cold water side; Circulation pipe
Installation 24 Instruction manual BFC 3 is 3.6 Water connections, Vented Warning The installation should be carried 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...
Page 26 - Gas connection; Air supply and flue
Installation 26 Instruction manual BFC 3 is 3.8 Gas connection Warning The installation should be carried out by an authorised installation engineer, in compliance with general and local regulations (1.3 "Regulations") . Caution Make sure that the diameter and length of the gas supply pipe a...
Page 28 - Concentric connections; Practical example of concentric flue gas discharge
Installation 28 Instruction manual BFC 3 is Explanation of type of appliance Note Make sure that the chimney discharges into an area where this is permitted for this category of appliance. 3.9.3 Concentric connections The table shows the requirements for concentric systems. Warning Install flue gas ...
Page 29 - Specifications
Instruction manual BFC 29 is Appliance with concentric flue gas discharge material According to the table, the maximum 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...
Page 31 - Parallel connections; Practical example of parallel flue gas discharge
Instruction manual BFC 31 is 3.9.4 Parallel connections The table states the maximum pipe lengths for parallel systems. The maximum pipe length depends on the chosen diameter. Warning Install flue component pipe runs with a run-off of 5 mm per metre. Table of pipe lengths You must use the longest pi...
Page 32 - connection
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 metres. This 35 metres is the sum of pipe sections 1, 2, 3, 4 and 5. The length of the ...
Page 34 - Connecting the mains voltage
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 appliance. The electrical section is now visible. 3. Loosen the ...
Page 35 - Connecting a program-controlled pump
Instruction manual BFC 35 is 4. If you 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 a program-controlled pump 1. Connect phase (L), neutral (N) and earth ( ...
Page 38 - Adjusting the pressure; Finalising
Installation 38 Instruction manual BFC 3 is 3.11.3 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. ...
Page 41 - Filling
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. d...
Page 42 - Filling the appliance
Filling 42 Instruction manual BFC 5 gis 5.1 Filling the appliance 5.1.1 Filling unvented 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). 2. Close the drain valve (9).3. Open t...
Page 43 - Draining
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. ...
Page 47 - The control panel; Controls; Electronic controller ON/OFF switch
Instruction manual BFC 47 gis 7 The control panel 7.1 Introduction Topics covered in this chapter:• Controls ; • Meaning of icons ; • Electronic controller ON/OFF switch ; • Navigation buttons ; • PC connection . 7.2 Controls <The entire appliance is controlled (and monitored) by the ThermoContro...
Page 48 - PC connection
The control panel 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 ca...
Page 49 - Operating modes
Instruction manual BFC 49 gis 8 Status of the appliance 8.1 Introduction Topics covered in this chapter:• Operating modes ; • Error conditions ; • Service condition . 8.2 Operating modes When running, the appliance has four basic operating modes, namely:• OFF • ON • EXTRA • PROG 8.2.1 OFF In this mo...
Page 50 - Error conditions
Status of the appliance 50 Instruction manual BFC 8 gis 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: 1. The current time falls within...
Page 51 - Service condition
Instruction manual BFC 51 gis 8.4 Service condition The figure shows the message SERVICE 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 SERVICE REQUIRED is base...
Page 53 - Starting and running; The appliance's heating cycle
Instruction manual BFC 53 gis 9 Starting and running 9.1 Introduction Topics covered in this chapter, in sequence:• Starting and running . • 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 "Install...
Page 55 - Shutting down; Shut the appliance down for a brief; Electrically isolating the appliance; Shutting the appliance down for a long
Instruction manual BFC 55 gis 10 Shutting down 10.1 Introduction This chapter describes:• Shut the appliance down for a brief period ("OFF mode") ; • Electrically isolating the appliance ; • Shutting the appliance down for a long period . 10.2 Shut the appliance down for a brief period ("...
Page 57 - Main menu; Notational convention for menu-related; Setting the water temperature
Instruction manual BFC 57 gis 11 Main menu 11.1 Notational convention for menu-related instructions The MENU ( ) of the electronic controller is divided into submenus. For example, SETTINGS is one of the functions reached from the main menu. The SETTINGS menu is divided into submenus in turn. For ex...
Page 58 - Starting and stopping the week
Main menu 58 Instruction manual BFC 11 gis 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 bec...
Page 59 - Adding times to a week program
Instruction manual BFC 59 gis Confirm with . 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 and to set the minutes. In the example...
Page 60 - Deleting times from a week program
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 appear. Example As an example, we will program an extra period in which the switch-on time is...
Page 61 - Programming an extra period
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 has been deleted. You will return now to the week program menu. The cursor points to the first program...
Page 63 - Displaying appliance specifications
Instruction manual BFC 63 gis 11.11.2 Setting day and time To enter the time and day: 1. Call up the menu for entering 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 f...
Page 65 - Service program; Setting the hysteresis; Displaying the error history
Instruction manual BFC 65 is 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 ; • Displaying the appliance history ; • Display the selected appliance ; • Swi...
Page 67 - Troubleshooting
Instruction manual BFC 67 gis 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 manua...
Page 68 - Troubleshooting table for general errors
is Instruction manual BFC 68 13.2 Troubleshooting table for general errors Warning Maintenance may only be performed by a qualified service and maintenance engineer. General errors Symptom Cause Solution Remark Gas smell Gas leak Warning Close the main gas valve immediately. Warning Do not operate a...
Page 70 - Displayed errors
is Instruction manual BFC 70 13.3 Displayed errors Code + Description Cause Solution Remark 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 diagram (17 "Appendices") D...
Page 81 - Determining service
Instruction manual BFC 81 is 14 Maintenance frequency 14.1 Introduction A service should be carried out at least once 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 temper...
Page 83 - Preparation for
Instruction manual BFC 83 s 15 Performing maintenance 15.1 Introduction Caution 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 ...
Page 85 - maintenance; Checking the anodes
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 Water-side maintenance 15.3.1 Introduction The following steps must be carried out on the water side:1. Checkin...
Page 86 - Cleaning condensation water discharge; Cleaning the heat exchanger
Performing maintenance 86 Instruction manual BFC 15 s 6. Close the cleaning opening. To avoid damage to the tank, tighten the bolts that fasten the lid with a torque no greater than 50 Nm. Use suitable tools for this. 15.3.4 Cleaning condensation water discharge Regular cleaning of the condensation ...
Page 87 - General warranty
Instruction manual BFC 87 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 a appliance supplied by A.O. Smith water Products Company B.V. of V...
Page 88 - warranty
Warranty (certificate) 88 Instruction manual BFC 16 gis 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...
Page 89 - Appendices
Instruction manual BFC 89 is 17 Appendices 17.1 Introduction This appendix contains:• Electrical diagram (17.2 "BFC Electrical Diagram.") • Week program card
Page 93 - Week program card
Instruction manual BFC 93 17.3 Week program card You can cut the week program card out and keep it near the appliance. Example Period DAY TIME Tset 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 /...
Page 95 - Index
Instruction manual BFC 95 Index A ambient temperature 18appliance displaying history 66displaying selection 66general working principle 13heating cycle 14protection 14types 9, 17 B burner pressure 35 C claims 88connect 24, 25 air supply 26Alarm OUT 35circulation piping 24, 25cold water side 24, 25co...
