A.O. Smith SGE s

Instruction manual SGE 93

s

15 Performing

maintenance

15.1 Introduction Caution

Maintenance may only by carried out by an approved 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 following order.

1. Preparation for maintenance

2. Water-side maintenance

3. Gas-side maintenance

4. Solar collector maintenance

5. Finalizing maintenance

Note

Before ordering spare parts, it is important to write down the appliance type

and model, and the full serial number of the appliance. These details can be

found on the rating plate. Only by ordering with this information can you be sure

to receive the correct spare parts.

15.2 Preparation for

maintenance

To test whether all components are still working properly, complete the following

steps:

1. Activate the

MENU

with .

2. Use: and to place the cursor beside

OFF

.

3. Confirm

OFF

with .

4. Wait until the fan has stopped. The icon is then dimmed.

Caution

Failure to wait until the fan stops purging can cause damage to the

appliance.

5. Switch the appliance OFF (position 0) using the ON/OFF switch on the

control panel.

MENU

»OFF

^ ON

È WEEK PROGRAM

Contents

Main Page Instruction manual SGE 3 Read this manual carefully Trademarks Liability More information Page Instruction manual SGE 5 Table of contents 1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 2 Working principle of the appliance- - - - - - - - - - - - - - - 13 3 Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - 19 6 Draining - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53 8 Status of the appliance - - - - - - - - - - - - - - - - - - - - - 59 9 Starting and running - - - - - - - - - - - - - - - - - - - - - - 61 10 Shutting down - - - - - - - - - - - - - - - - - - - - - - - - - 63 11 Main menu - - - - - - - - - - - - - - - - - - - - - - - - - - - 65 12 Service program - - - - - - - - - - - - - - - - - - - - - - - - 73 Page Page Instruction manual SGE 9 1 Introduction 1.1 About the appliance 1.2 What to do if you smell gas 1.3 Regulations 10 Instruction manual SGE 1gis 1.4 Target groups 1.5 Maintenance 1.6 Forms of notation Instruction manual SGE 11 1.7 Overview of this document Page Instruction manual SGE 13 2 Working principle of the appliance 2.1 Introduction 2.2 General working principle of the appliance 14 Instruction manual SGE 2.3 The appliance's heating cycle Instruction manual SGE 15 2.4 Protection for the appliance 2.4.1 Introduction 16 Instruction manual SGE 2.4.2 Appliance water temperature protection 2.4.3 Gas valve 2.4.4 Fan 2.4.5 Pressure switch Page 18 Instruction manual SGE 2.6.2 Fluid temperature 2.7 Safety of the solar 2.7.1 Expansion vessel 2.7.2 Expansion valve 3 Installation 3.1 Introduction 3.2 Packaging 3.3 Environmental conditions 20 Instruction manual SGE 3.3.1 Air humidity and ambient temperature 3.3.2 Appliance maximum floor load 3.3.3 Water composition Instruction manual SGE 21 3.3.4 Working clearances Page Page 24 Instruction manual SGE 3.4.2 General and electrical specifications 3.4.3 Gas data Page Page Instruction manual SGE 27 3.6 Water connections, Unvented 3.6.1 Cold water side 3.6.2 Hot water side 3.6.3 Circulation pipe Page Instruction manual SGE 29 3.8 Gas connection 3.9 Air supply and flue 3.9.1 Introduction 3.9.2 Requirements for flue gas discharge materials Page Instruction manual SGE 31 3.9.3 Concentric connections Page Instruction manual SGE 33 3.9.4 Parallel connections 34 Instruction manual SGE Practical example of parallel chimney flue Instruction manual SGE 35 3.10 Solar heating system 3.11 Electrical connection 3.11.1 Introduction 36 Instruction manual SGE 3.11.2 Preparation Instruction manual SGE 37 3.11.3 Connecting the mains voltage 3.11.4 Isolating transformer 3.11.5 Connecting continuous pump 38 Instruction manual SGE 3.11.6 Connecting a program-controlled pump 3.11.7 Connecting an extra ON mode switch ("Tank ON") 3.11.8 Connecting an extra error signal ('Alarm OUT' ) 3.11.9 Connecting communication cable to solar heating system Instruction manual SGE 39 3.12.1 Preparation 3.12.2 Connecting the mains power 3.12.3 Connecting pump station - modulating pump 3.12.4 Connecting solar collector 40 Instruction manual SGE 3.12.5 Connecting tank sensor 3.12.6 Connecting communication cable 3.12.7 Connecting extra head pump 3.12.8 Connecting Q/T sensor Instruction manual SGE 41 3.13 Checking the supply pressure and burner pressure 42 Instruction manual SGE 3.13.1 Preparation 3.13.2 Procedure to check pressures Instruction manual SGE 43 3.13.3 Adjusting the pressure Page 4 Conversion to a different gas category 4is Page Page Page 50 Instruction manual SGE 5gis 5.1 Filling the appliance 5.1.1 Filling unvented installations 5.1.2 Filling vented installations Instruction manual SGE 51 5.2 Filling solar heating system 5.2.1 Filling solar heating system with glycol 5gis Page 54 Instruction manual SGE 6gis 6.1 Draining unvented installations Instruction manual SGE 55 6.2 Draining vented installations 6.3 Draining solar 6.3.1 Draining glycol-filled system 6gis Instruction manual SGE 57 7 The control panel 7.1 Introduction 7.2 Controls 7.3 Meaning of icons 7.4 Electronic controller ON/OFF switch 7gis 7.5 Navigation buttons 7.6 PC connection Instruction manual SGE 59 8 Status of the appliance 8.2.4 8.2.3 8.2.2 8.2.1 8gis 8.3 Error conditions 8.4 Service condition 8.5 Collector temperature warning 8.6 Q/T Sensor warning 9 Starting and running 9.1 Introduction 9.2 Starting the appliance 9.3 The appliance's heating cycle 9gis Instruction manual SGE 63 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 SGE 65 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 66 Instruction manual SGE 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 SGE 67 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 68 Instruction manual SGE 11.7.4 Week program: setting the program- controlled pump 11.8 Adding times to a week program Instruction manual SGE 69 11.9 Deleting times from a week program 11.10 Extra period 70 Instruction manual SGE 11.11 Programming an extra period Instruction manual SGE 71 11.12 Se ttings 11.12.1 Setting menu language 11.12.2 Setting day and time 72 Instruction manual SGE 11.12.3 Displaying appliance specifications (SGE) Instruction manual SGE 73 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 Display the selected appliance 12.6 Switching the pump on or off 12.7 Setting the service interval 12.8 Setting legionella prevention Instruction manual SGE 75 12.9 Solar heating system configuration 12.9.1 Setting the drain-back tank 12.9.2 Setting the heating fluid type in the solar heating system 12.9.3 Setting threshold temperature of pump in solar heating system 12 is 12.9.6 Setting the QT sensor yes/no 12.9.7 Reading the energy contribution of the solar heating system 12.10 Setting the central heating configuration Instruction manual SGE 77 13 Troubleshooting 13.1 Introduction Instruction manual SGE 78 13.2 Troubleshooting table for general errors Page Page Instruction manual SGE 81 13.3 Troubleshooting table for displayed errors Page Page Page Page Page Page Page Page Instruction manual SGE 90 13.4 Displayed warnings Instruction manual SGE 91 14 Maintenance frequency 14.1 Introduction 14.2 Determining service interval Page Instruction manual SGE 93 s 15 Performing maintenance 15.1 Introduction 15.2 Preparation for maintenance 15 s Instruction manual SGE 95 s 15.3 Water-side maintenance 15.3.1 Introduction 15.3.2 Checking the anodes 15.3.3 Descaling and cleaning the tank 15 s Instruction manual SGE 97 16 Warranty (certificate) 16.1 General warranty 16.2 Tank warranty 16.3 Collector warranty 16.4 Conditions for Installation and use 16 gis 16.5 Exclusions 16.6 Scope of the warranty 16.7 Claims 16.8 Obligations of A.O. Smith 17 Appendices Appendices 100 Instruction manual SGE 17 is 17.2 Menu structure Page Page Page Page Instruction manual SGE 105 17.4.1 Solar system electrical diagram legend Page Instruction manual SGE 107 17.5 Week program card Page Instruction manual SGE 109 Index A B C D 0308 817 1.0 UK Index P R S