A.O. Smith BFC - 30, BFC - 60 service manual

XTRA HIGH EFFICIENCYXTRA HIGH EFFICIENCY

WATER PRODUCTS

COMPANY

WATER PRODUCTS

COMPANY

A DIVISION OF A. O. SMITH CORPORATIONA DIVISION OF A. O. SMITH CORPORATION

WATER PRODUCTS

COMPANY

A DIVISION OF A. O. SMITH CORPORATION

Installation

User and

Service Manual

Installation

User and

Service Manual

Installation

User and

Service Manual

Contents

Main Page Instruction manual BFC 3 Read this manual carefully Trademarks Liability More information Page Table of contents 9 Starting and running - - - - - - - - - - - - - - - - - - - - - - 55 10 Shutting down - - - - - - - - - - - - - - - - - - - - - - - - - 57 11 Main menu - - - - - - - - - - - - - - - - - - - - - - - - - - - 59 12 Service program - - - - - - - - - - - - - - - - - - - - - - - - 67 13 Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - 69 Page Page Instruction manual BFC 9 1 Introduction 1.1 About the appliance 1.2 What to do if you smell gas 1.3 Regulations 10 Instruction manual BFC 1gis 1.4 Target groups 1.5 Maintenance Page 12 Instruction manual BFC 1gis 1.7 Overview of this document Instruction manual BFC 13 2 Working principle of the appliance 2.1 Introduction 2.2 General working principle of the appliance 14 Instruction manual BFC 2gis 2.3 The appliance's heating cycle 2.4 Protection for the appliance 2.4.1 Introduction Instruction manual BFC 15 2.4.2 Water temperature protection 2.4.3 Gas valve 2.4.4 Fan 2.4.5 Pressure switch 2gis 2.4.6 Flame probe 2.5 Safety of the instal- lation 2.5.1 Unvented installation 2.5.2 Vented installation 3 Installation 3.1 Introduction 3.2 Packaging 3.3 Environmental conditions 18 Instruction manual BFC 3.3.1 Air humidity and ambient temperature 3.3.2 Appliance maximum floor load 3.3.3 Water composition 3.3.4 Working clearances AA A BB Installation 20 Instruction manual BFC 3.4 Technical specifica- tions 3.4.1 Dimensions of the appliance Plan and elevation of the appliance Legend See the table. Instruction manual BFC 21 3.4.2 General and electrical specifications 22 Instruction manual BFC 3.4.3 Gas data Instruction manual BFC 23 3.5 Installation diagram 24 Instruction manual BFC 3.6 Water connections, Unvented 3.6.1 Cold water side 3.6.2 Hot water side 3.6.3 Circulation pipe Page 26 Instruction manual BFC 3.8 Gas connection 3.9 Air supply and flue 3.9.1 Introduction 3.9.2 Requirements for flue gas discharge materials Page 28 Instruction manual BFC 3.9.3 Concentric connections Practical example of concentric flue gas discharge Page Page Instruction manual BFC 31 3.9.4 Parallel connections Practical example of parallel flue gas outlet 32 Instruction manual BFC 3.10 Electrical connection 3.10.1 Introduction Instruction manual BFC 33 3.10.2 Preparation 34 Instruction manual BFC 3.10.3 Connecting the mains voltage 3.10.4 Isolating transformer Instruction manual BFC 35 3.10.5 Connecting continuous pump 3.10.6 Connecting a program-controlled pump 3.10.7 Connecting an extra ON mode switch ("Tank ON") 3.10.8 Connecting an extra error signal ('Alarm OUT' ) 36 Instruction manual BFC 3.11 Checking the supply pressure and burner pressure 3.11.1 Preparation Instruction manual BFC 37 3.11.2 Procedure to check pressures 38 Instruction manual BFC 3.11.3 Adjusting the pressure 3.11.4 Finalising 4 Conversion to a different gas category 4is Page Page 5 Filling 44 Instruction manual BFC 5gis 5.1 Filling the appliance 5.1.1 Filling unvented installations 5.1.2 Filling vented installations 6 Draining 46 Instruction manual BFC 6gis 6.1 Draining unvented installations 6.2 Draining vented installations Page Page Instruction manual BFC 49 7 The control panel 7.1 Introduction 7.2 Controls 7.3 Meaning of icons 7.4 Electronic controller ON/OFF switch 7gis 7.6 PC connection Instruction manual BFC 51 8 Status of the appliance 8.2.3 8.2.2 8.2.1 8.1 Introduction 8gis 8.2.4 8.3 Error conditions Instruction manual BFC 53 8.4 Service condition Page Instruction manual BFC 55 9 Starting and running 9.1 Introduction 9.2 Starting and running 9.3 The appliance's heating cycle 9gis Instruction manual BFC 57 10 Shutting down 10.1 Introduction 10.2 Shut the appliance down for a brief period ("OFF mode") 10.3 Electrically isolating the appliance 10.4 Shutting the appliance down for a long period Page Instruction manual BFC 59 11 Main menu 11.1 Introduction 11.2 Notational convention for menu-related instructions 11.3 Switching on the "ON mode" 11.4 Setting the water temperature 11.4.1 Setting the water temperature via the SET POINT MENU 60 Instruction manual BFC 11.4.2 Setting water temperature during ON mode 11.5 Week program 11.6 Starting and stopping the week program 11.7 Changing the appliance's standard week program Instruction manual BFC 61 11.7.1 Week program: setting the switch- on time 11.7.2 Week program: setting the switch- off time 11.7.3 Week program: setting the water temperature 62 Instruction manual BFC 11.7.4 Week program: setting the program- controlled pump 11.8 Adding times to a week program Instruction manual BFC 63 11.9 Deleting times from a week program 11.10 Extra period 64 Instruction manual BFC 11.11 Programming an extra period Instruction manual BFC 65 11.12 Se ttings 11.12.1 Setting menu language 11.12.2 Setting day and time 66 Instruction manual BFC 11.12.3 Displaying appliance specifications Instruction manual BFC 67 12 Service program 12.1 Introduction 12.2 Setting the hysteresis 12.3 Displaying the error history 68 Instruction manual BFC 12 is 12.4 Displaying the appliance history 12.5 Display the selected appliance 12.6 Switching the pump on or off 12.7 Setting the service interval 13 Troubleshooting 13.1 Introduction Instruction manual BFC 70 13.2 Troubleshooting table for general errors Page Instruction manual BFC 72 13.3 Troubleshooting table for displayed errors Page Page Page Page Page Page Page Page Page Page Instruction manual BFC 83 14 Maintenance frequency 14.1 Introduction 14.2 Determining service interval Page Instruction manual BFC 85 s 15 Performing maintenance 15.1 Introduction 15.2 Preparation for maintenance 15 s Instruction manual BFC 87 s 15.3 Water-side mainte- nance 15.3.1 Introduction 15.3.2 Checking the anodes 15.3.3 Descaling and cleaning the tank 15 s Instruction manual BFC 89 16 Warranty (certificate) 16.1 General warranty 16.2 Tank warranty 16.3 Conditions for Instal- lation and use 90 Instruction manual BFC 16 gis 16.4 Exclusions 16.5 Scope of the warranty 16.6 Claims 16.7 Obligations of A.O. Smith Page Page Page Page Instruction manual BFC 95 17.3 Week program card Page Instruction manual BFC 97 Index A B C D 0306 059 4.1 UK Index N O P