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 • 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...
Page 11 - Forms of notation
Instruction manual BFC 11 gis 1.6 Forms of notation The following notation is used in this manual: Note Important information. Attention Ignoring this information can lead to the appliance being damaged. Warning Failure to carefully read this information may lead to personal injury and serious damag...
Page 15 - Gas valve
Instruction manual BFC 15 gis 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 sensors. Temperature protection 2.4.3 Gas valve T...
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 - Appliance 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 Technical specifica-tions 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...
Page 24 - Cold water side; Circulation pipe
Installation 24 Instruction manual BFC 3 is 3.6 Water connections, Unvented 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 ...
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") . Attention Make sure that the diameter and length of the gas supply pipe...
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 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 pr...
Page 31 - Parallel connections; Practical example of parallel flue gas outlet
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. Flue gas outlet requirements for parallel systems...
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 25 metres. This 25 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 continuous 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 continuous pump 1. Connect phase (L), neutral (N) and earth ( ) to termi...
Page 36 - Checking the supply
Installation 36 Instruction manual BFC 3 is 3.11 Checking the supply pressure and burner pressure Note Before starting the appliance and/or checking the supply pressure and burner pressure, you must fill (5 "Filling") the appliance. Attention Before starting up for the first time or after co...
Page 37 - Procedure to check pressures
Instruction manual BFC 37 is 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 the...
Page 38 - Adjusting the pressure; Finalising
Installation 38 Instruction manual BFC 3 is 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 &...
Page 43 - Filling
Instruction manual BFC 43 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 44 - Filling the appliance
Filling 44 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 45 - Draining
Instruction manual BFC 45 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 49 - The control panel; Controls; Electronic controller ON/OFF switch
Instruction manual BFC 49 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 figure shows the electronic controller. The control panel is completel...
Page 50 - PC connection
The control panel 50 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 51 - Operating modes
Instruction manual BFC 51 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 52 - Error conditions
Status of the appliance 52 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 53 - Service condition
Instruction manual BFC 53 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 55 - Starting and running; The appliance's heating cycle
Instruction manual BFC 55 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 57 - Shutting down; Shut the appliance down for a brief; Electrically isolating the appliance; Shutting the appliance down for a long
Instruction manual BFC 57 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 59 - Main menu; Notational convention for menu-related; Setting the water temperature
Instruction manual BFC 59 gis 11 Main menu 11.1 Introduction The MENU is reached by pressing the button on the electronic controller. 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. I...
Page 60 - Starting and stopping the week
Main menu 60 Instruction manual BFC 11 gis • Confirm with .After confirming, the appliance enters "ONmode". 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...
Page 62 - Adding times to a week program
Main menu 62 Instruction manual BFC 11 gis 11.7.4 Week program: 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 ...
Page 63 - Deleting times from a week program
Instruction manual BFC 63 gis 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. To delete a period, proceed as follows:1. : WEEK PROGRAM | PROGRAM OVERVIEW . Co...
Page 64 - Programming an extra period
Main menu 64 Instruction manual BFC 11 gis 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 sett...
Page 66 - Displaying appliance specifications
Main menu 66 Instruction manual BFC 11 gis Confirm the minute setting with 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 eng...
Page 67 - Service program; Setting the hysteresis; Displaying the error history
Instruction manual BFC 67 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 69 - Troubleshooting
Instruction manual BFC 69 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 70 - Troubleshooting table for general errors
is Instruction manual BFC 70 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 72 - Troubleshooting table for displayed errors
is Instruction manual BFC 72 13.3 Troubleshooting table for displayed errors 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 ele...
Page 83 - Determining service
Instruction manual BFC 83 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 85 - Preparation for
Instruction manual BFC 85 s 15 Performing maintenance 15.1 Introduction 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 th...
Page 87 - nance; Checking the anodes
Instruction manual BFC 87 s 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&P valve. The water should spurt out.17. Check the drain pipes from the discharge points of all valves and remove any l...
Page 88 - Cleaning condensation water discharge; Cleaning the heat exchanger
Performing maintenance 88 Instruction manual BFC 15 s 4. Inspect the tank and remove the loose scale deposits and contamination.5. If the 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 a...
Page 89 - General warranty
Instruction manual BFC 89 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 90 - warranty
Warranty (certificate) 90 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 91 - Appendices
Instruction manual BFC 91 is 17 Appendices 17.1 Introduction This appendix contains:• Electrical diagram • Week program card
Page 92 - Electrical diagram
Appendices 92 Instruction manual BFC 17 is 17.2 Electrical diagram Electrical diagram 1 = brown, 2 = blue, 3 = green, 4 = black, 5 = white, 6 = grey / beige 0307 579 R1
Page 95 - Week program card
Instruction manual BFC 95 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 97 - Index
Instruction manual BFC 97 Index A ambient temperature 18appliance displaying history 68displaying selection 68displaying specifications 66general working principle 13heating cycle 14protection 14types 9, 17 B burner pressure 36 C claims 90connect 24, 25 air supply 26Alarm OUT 35circulation piping 24...
