A.O. Smith GWV - 120, GWV - 150, GWV - 200

Instruction manual GWV 13

gis

2 Working principle of

the appliance

2.1 Introduction Topics covered in this chapter:

•General working principle of the appliance;

•The appliance's heating cycle;

•Protection for the appliance;

•Safety of the installation.

2.2 General working

principle of the

appliance

The figure shows a cut-away view of the appliance.

Contents

Main V Page Instruction manual GWV 3 Read this manual carefully Trademarks Liability More information Page Table of contents 9 Starting and running - - - - - - - - - - - - - - - - - - - - - - 55 10 Shutting down - - - - - - - - - - - - - - - - - - - - - - - - - 59 11 Main menu - - - - - - - - - - - - - - - - - - - - - - - - - - - 61 12 Service program - - - - - - - - - - - - - - - - - - - - - - - - 69 13 Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - 73 Page Page Instruction manual GWV 9 1 Introduction 1.1 About the appliance 1.2 What to do if you smell gas 1.3 Regulations 10 Instruction manual GWV 1gis 1.4 Target groups 1.5 Maintenance 1.6 Forms of notation Instruction manual GWV 11 1.7 Overview of this document Page Page Working principle of the appliance Cut-away view of the appliance Instruction manual GWV 15 2.3 The appliance's heating cycle 16 Instruction manual GWV 2.4 Protection for the appliance 2.4.1 Introduction 2.4.2 Water temperature protection 2.4.3 Gas control 2.4.4 Fan Instruction manual GWV 17 2.4.6 Flame probe 2.4.7 Flow-through switch 18 Instruction manual GWV 2.5 Safety of the instal- lation 2.5.1 Unvented installation 2.5.2 Vented installation 2.5.3 Inlet combination and pressure-reducing valve 3 Installation 3.1 Introduction 3.2 Packaging 20 Instruction manual GWV 3.3 Environmental conditions 3.3.1 Air humidity and ambient temperature 3.3.2 Maximum floor loading Instruction manual GWV 21 3.3.3 Water composition 3.3.4 Working clearances Installation 22 Instruction manual GWV 3.4 Technical specifica- tions I 3.4.1 Dimensions of the appliance Plan and elevation of the appliance Instruction manual GWV 23 3.4.2 General and electrical specifications 24 Instruction manual GWV 3.4.3 Gas data Instruction manual GWV 25 3.5 Installation diagram 7 R2 Vented IMD- 26 Instruction manual GWV 3.6 Water connections, Vented 3.6.1 Cold water side 3.6.2 Hot water side 3.6.3 Circulation pipe Page 28 Instruction manual GWV 3.7 Water connections, Unvented 3.7.1 Cold water side 3.7.2 Hot water side 3.7.3 Circulation pipe Page Page Instruction manual GWV 31 3.9.3 Parallel connections 3.9.4 Specifications Page Instruction manual GWV 33 3.10 Electrical connection 3.10.1 Introduction 3.10.2 Preparation Page Instruction manual GWV 35 3.10.3 Connecting the mains voltage 3.10.4 Connecting a program-controlled pump 36 Instruction manual GWV 3.10.5 Connecting an external on/off switch 3.10.6 Connecting an alarm signal ('Alarm OUT') 3.10.7 Sensor wiring 3.11 Checking the supply pressure and burner pressure Instruction manual GWV 37 3.11.1 Preparation 3.11.2 Procedure for checking pressures 38 Instruction manual GWV 3.11.3 Adjusting the pressure Instruction manual GWV 39 3.11.4 Finalising Page 4 Conversion to a different gas category Page Instruction manual GWV 43 5 Filling R2 5.1 Installation diagram IMD- 0 5gis 5.2 Filling unvented installations Instruction manual GWV 45 5.3 Filling vented instal- lations Page Instruction manual GWV 47 6 Draining R2 6.1 Installation diagram IMD- 0 6gis 6.2 Draining unvented installations Instruction manual GWV 49 6.3 Draining vented installations Page Instruction manual GWV 51 7 The control panel 7.1 Introduction 7.2 Operation 7.3 Meaning of icons 7.4 Electronic controller ON/OFF switch 7gis 7.6 PC connection Instruction manual GWV 53 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 8.4 Service condition 8.5 Warning 9 Starting and running 9.1 Introduction 9.2 Starting and running 9.3 The appliance's heating cycle 9gis Page Page Instruction manual GWV 59 10 Shutting down 10.1 Introduction 10.2 Shutting the installation down for a brief period ("OFF mode") 10.3 Isolating the appliance from the mains 10.4 Shutting the appliance and storage tank down for a long period Page Instruction manual GWV 61 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 62 Instruction manual GWV 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 GWV 63 11.7.1 Week program: setting the switch- on time 11.7.2 Week program: setting switch-off time 11.7.3 Week program: setting the water temperature 64 Instruction manual GWV 11.7.4 Week program: setting the program- controlled pump 11.8 Adding times to a week program Instruction manual GWV 65 11.9 Deleting times from a week program 11.10 Extra period 66 Instruction manual GWV 11.11 Programming an extra period 11.11.1 Setting the switch-on time 11.11.2 Setting the switch-off time 11.11.3 Setting the water temperature Instruction manual GWV 67 11.12 Se ttings 11.12.1 Setting menu language 11.12.2 Setting day and time 68 Instruction manual GWV 11.12.3 Displaying appliance specifications Instruction manual GWV 69 12 Service program 12.1 Introduction 12.2 Setting the hysteresis 12.3 Displaying the error history 12.4 Displaying the appliance history 12 is 12.5 Displaying the appliance selection 12.6 Switching the pump on or off 12.7 Setting the service interval 12.8 Setting the display contrast Instruction manual GWV 71 12.12 Setting the pump running-on time Page Instruction manual GWV 73 13 Troubleshooting 13.1 Introduction Instruction manual GWV 74 13.2 Troubleshooting table for general errors Page Instruction manual GWV 76 13.3 Troubleshooting table for displayed errors Page Page Page Page Page Page Page Page Instruction manual GWV 85 13.4 Warnings Page Instruction manual GWV 87 14 Maintenance frequency 14.1 Introduction 14.2 Determining service interval Page Instruction manual GWV 89 s 15 Performing maintenance 15.1 Introduction 15.2 Preparation for maintenance 15 s Instruction manual GWV 91 s 15.3 Water-side mainte- nance 15.3.1 Introduction 15.3.2 Checking the anodes 15.3.3 Descaling and cleaning the storage tank 15 s Instruction manual GWV 93 16 Warranty (certificate) 16.1 General warranty 16.2 Appliance warranty 16.3 Conditions for Instal- lation and use 16 gis Page Appendices 96 Instruction manual GWV 17 is 0308191 R1 16 15 11 Page Page Instruction manual GWV 99 17.3 Week program card Page Index