A.O. Smith 28 30 50 60 2 Functioning of the appliance

Introduction

Release R.1.3 UK 13

gis

2 Functioning of the appliance

2.1 Introduction Topics covered in this chapter:

•Functional description of the appliance;

•The appliance’s heating cycle;

•Protection for the appliance;

•Safety of the installation.

2.2 Functional

description of the

appliance

Figure 2.1 shows a cut-away view of the appliance.

Legend

aplastic top cover

bhot water outlet

celectrical connection block

dThermoControl

epressure switch

fcontrol panel

gtemperature sensor T1

hcombustion chamber

ianode

jtank

kheat exchanger

linspection and cleaning

opening

mtemperature sensor T2

ncold water inlet

odrain valve

pgas control

qburner

rfan

sair supply hose

tglow igniter

uionisation rod

vchimney pipe

wsiphon

xPU insulation layer

IMD-0070

Figure 2.1 Cut-away view of the appliance

gis

Contents

Main Page Release R.1.3 UK 3 Copyright Trademarks Liability More information Page Release R.1.3 UK 5 Table of contents 1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 2 Functioning of the appliance- - - - - - - - - - - - - - - - - - 13 3 Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - 17 4 Filling and draining - - - - - - - - - - - - - - - - - - - - - - - 39 5 The control panel- - - - - - - - - - - - - - - - - - - - - - - - 43 6 Status of the appliance - - - - - - - - - - - - - - - - - - - - - 45 7 Starting up and shutting down - - - - - - - - - - - - - - - - - 49 8 Main menu - - - - - - - - - - - - - - - - - - - - - - - - - - - 53 Release R.1.3 UK 7 9 Service program - - - - - - - - - - - - - - - - - - - - - - - - 65 10 Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - 69 11 Maintenance frequency - - - - - - - - - - - - - - - - - - - - 83 12 Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - 85 Page Release R.1.3 UK 9 1 Introduction 1.1 About the appliance 1.2 What to do if you smell gas Warning 1.3 Regulations 1gis g i s Page Page Release R.1.3 UK 13 2 Functioning of the appliance 2.1 Introduction 2.2 Functional description of the 14 Instruction Manual BFC 2gis 2.3 The appliances heating cycle 2.4 Protection for the Release R.1.3 UK 15 2.4.1 Water temperature protection 2.4.2 Gas control 2.4.3 Fan 2.4.4 Pressure switch 2gis 2.4.5 Ionisation rod 2.5 Safety of the instal- lation 2.5.1 Unvented installation 2.5.2 Vented installation 3 Installation Page Page Page Release R.1.3 UK 21 Table 3.4 Dimensions Page Release R.1.3 UK 23 Table 3.6 Gas data 3.5 Installation diagram Gas category data Page Page Page Page 28 Instruction Manual BFC 3.9.1 Concentric wall flue terminal Table 3.8 Concentric wall flue terminal specifications Release R.1.3 UK 29 3.9.2 Concentric roof flue terminal Table 3.9 Concentric roof flue terminal specifications 30 Instruction Manual BFC 3.10 Electrical connection Warning 3.10.1 Introduction 3.10.2 Preparation Table 3.10 Electrical connection block Release R.1.3 UK 31 3.10.3 Mains voltage 32 Instruction Manual BFC 3.10.4 Isolating Transformer 3.10.5 Continuous pump 3.10.6 program-controlled pump 3.10.7 Extra ON mode switch (Tank ON) Release R.1.3 UK 33 3.10.8 Connecting extra error signal (Alarm OUT) 3.11 Checking the supply pressure and burner pressure Page Release R.1.3 UK 35 3.12 Conversion to a different gas category 36 Instruction Manual BFC n Release R.1.3 UK 37 c Page Release R.1.3 UK 39 4 Filling and draining 4.1 Introduction 4.2 Filling the appliance 4.2.1 Filling unvented installations 4.2.2 Filling vented installations 4gis Release R.1.3 UK 41 4.3 Draining the 4.3.1 Draining unvented installations 4.3.2 Draining vented installations Page Release R.1.3 UK 43 5 The control panel 5.1 Introduction 5.2 Operating 44 Instruction Manual BFC 5gis 5.3 Explanation of the icons 5.4 ON/OFF switch of ThermoControl 5.5 Navigation buttons 5.6 PC connection. 6 Status of the appliance 6.1 Introduction 6.2 Operating modes 46 Instruction Manual BFC 6gis 6.3 Error conditions Release R.1.3 UK 47 6.4 Service condition Page Release R.1.3 UK 49 7 Starting up and shutting down 7.1 Introduction 7.2 Starting up 7.3 Shutting down 50 Instruction Manual BFC 7gis 7.3.1 Shut the appliance down for a brief period (OFF mode) 7.3.2 Disconnect the appliance from the mains 7.3.3 Shut the appliance down for a longer period Release R.1.3 UK 51 W S O D 7gis G O V and D S 8 Main menu 8.1 Introduction 8.2 Notational convention for menu-related instructions 54 Instruction Manual BFC 8.3 Switching into ON mode 8.4 Setting the water temperature 8.4.1 Setting the water temperature via SETPOINT MENU 8.4.2 Setting water temperature during ON mode Release R.1.3 UK 55 8.5 Week programme 8.5.1 Introduction 8.5.2 Starting up and shutting down the week program 8.5.3 Changing the appliances standard week program Page Release R.1.3 UK 57 8.5.4 Adding times to a week program 58 Instruction Manual BFC 8.5.5 Deleting times from a week program Page 60 Instruction Manual BFC 8.6 Extra period 8.6.1 Introduction 8.6.2 Programming an extra period Release R.1.3 UK 61 8.7 Settings 8.7.1 Introduction 8.7.2 Setting menu language 62 Instruction Manual BFC 8.7.3 Setting day and time 8.7.4 Displaying appliance specifications Page Page Release R.1.3 UK 65 9 Service program 9.1 Introduction 9.2 Setting the hysteresis 9.3 Displaying the error history 66 Instruction Manual BFC 9is 9.4 Displaying the appliance history 9.5 Display the selected 9.6 Setting the pump on/off 9.7 Setting the service interval Release R.1.3 UK 67 9.8 Setting the display contrast 9.9 Setting the backlight time 9.10 Setting the display scroll speed Page Release R.1.3 UK 69 10 Troubleshooting 10.1 Introduction Page Page Release R.1.3 UK 72 10.3 Troubleshooting table for displayed errors Page Page Page Page Page Page Page Page Page Page Release R.1.3 UK 83 gs 11 Maintenance frequency 11.1 Introduction 11.2 Determining service interval Page Release R.1.3 UK 85 12 Maintenance 12.1 Introduction cNote 12.2 Preparation for maintenance Page Page 12 s Release R.1.3 UK 89 13 Warranty (Certificate) 13.1 General warranty 13.2 Tank warranty 13.3 Installation and conditions of use 13.4 Exclusions 13 gis Page Appendices 92 Instruction Manual BFC Ais % A.2 Electrical diagram BFC A ! Page Index Release R.1.3 UK 95 IX Index A B C D IX gis N O P R