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A.O. Smith SGS-28 Installation, User And Service Manual

Condensing high efficiency gas-solar water heater
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SGS
Condensing High Efficiency
Gas-Solar Water Heater
SGS - 28/30/50/60/80/100/120
Installation, User and Service
Manual
Innovation has a name.

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Summary of Contents for A.O. Smith SGS-28

  • Page 1 Condensing High Efficiency Gas-Solar Water Heater SGS - 28/30/50/60/80/100/120 Installation, User and Service Manual Innovation has a name.
  • Page 2 A.O. Smith UK, Unit B8 Amstrong Mall, Southwood Business Park, Farnborough, Hampshire GU14 0NR www.aosmith.co.uk “A.O. Smith Water Heaters” is a trading name of Advance Services (Sales) Ltd. Reg.
  • Page 3 Errata The amendments below apply to:  the preparation of the electrical connection of the solar heating control (3.12.1 "Preparation");  finishing maintenance (15.6 "Finalizing maintenance");  the electrical diagram of the solar heating control (17.4 "Electrical diagram solar heating system"). These instructions supersede the previous instructions of the solar heating control.
  • Page 4 17.3 Electrical diagram Electrical diagram solar heating system 0309687b R2.0 1 = brown, 2 = blue, 3 = yellow / green, 4 = black, 5 = white, 6 = grey / beige, 7 = green, 8 = yellow...
  • Page 5 TERMINAL BLOCK CONNECTIONS Earth Neutral Live input of the controller Live input for the solar heating system modulating pump PWM+ PWM+ stuursignaal t.b.v. aansturing pomp zonnesysteem PWM- PWM- stuursignaal t.b.v. aansturing pomp zonnesysteem COMPONENTS Controller Solar heating system pump (modulating) (230 VAC) [VAC] Solar heating system pump (modulating) (PWM-signal) [PWM]...
  • Page 6 Read this manual carefully Warning Read this manual carefully before starting the water heater. Failure to read the manual and to follow the printed instructions may lead to personal injury and damage to the water heater. Copyright © 2013 A.O.Smith Water Products Company All rights reserved.
  • Page 7 Instruction manual SGS...

  • Page 8: Table Of Contents

    Contents Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 About the water heater - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 What to do if you smell gas- - - - - - - - - - - - - - - - - - - - - - - - - 9 Regulations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 Target groups - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10...
  • Page 9 Contents The control panel - - - - - - - - - - - - - - - - - - - - - - - - 63 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 63 Control - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 63 Explanation of icons- - - - - - - - - - - - - - - - - - - - - - - - - - - - 63 ON/OFF switch on controller - - - - - - - - - - - - - - - - - - - - - - - 63...
  • Page 10 Errors- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 85 13.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 85 13.2 Troubleshooting table for general errors - - - - - - - - - - - - - - - - - 86 13.3...
  • Page 11 Contents Instruction manual SGS...

  • Page 12: Introduction

    Introduction About the water This manual describes how to install, service and use the SGS water heater. The SGS water heater is a condensing boiler with a fan in the air intake. The heater water heater is typically supplied with a storage tank fitted with a heat exchanger connected to a solar energy source, but can also operate standalone.

  • Page 13: Target Groups

    Introduction The installation should also be in accordance with any relevant requirements of the HSE, local gas region and local authority and the relevant recommendations of the following documents: British and European Standards • BS 6891: Installation of low pressure gas pipework of up to 35 mm (R1¼) in domestic premises (2nd family gas) - Specification.

  • Page 14: Maintenance

    Symbols on each page indicate the target groups for whom the information is intended. See the table. Target group symbols Symbol Target Group (End) user Installation engineer Service and maintenance engineer Caution This water heater is not intended for use by persons with reduced physical, sensory or mental capacities, or who lack the necessary experience or knowledge, unless the person responsible for their safety is supervising them or has explained to them how the water heater should be used.

  • Page 15: Overview Of This Document

    Introduction Overview of this document Chapter Target groups Description Working principle of the water This chapter describes the working principle of the water heater heater. Installation This chapter describes the installation activities to be carried out before final commissioning. Conversion to a different gas This chapter describes the activities required to convert category the water heater to a different gas category.

  • Page 16: Working Principle Of The Water Heater

    Working principle of the water heater Introduction This chapter covers the following topics: • General working principle of the water heater; • Water heater operating cycle; • Protection for the water heater; • Safety of the installation; • Protection for the solar heating system; •...
  • Page 17 Cut-away view of the water heater Legend SGS 28, 30, 50, 60 SGS 80, 100, 120 Unused numbers are not applicable cover hot water outlet electrical connector block controller pressure switch control panel temperature sensor T combustion chamber anode tank heat exchanger inspection and cleaning opening...

  • Page 18: Water Heater Operating Cycle

    Water heater The water temperature (T ) at the top of the water heater is used to control when the gas burner is started and stopped. The temperature changes in the operating cycle water heater are used for switching the solar heating system on and off (using and S ).

  • Page 19: Protection For The Water Heater

    Working principle of the water heater Graphical representation of operating cycle Legend A = Gas burner on B = Gas burner off solar limit • = No heat demand, so water is not heated • = Water heated via solar heating system •...

  • Page 20: Safety Of The Installation

    2.4.3 Storage tank water temperature protection Using temperature sensors S and S , the solar heating system controller monitors several temperatures in the storage tank that are related to safety. Temperature protection Protection Description Against frost: The frost protection cuts in. The water is heated to 20°C. <...

  • Page 21: Protection For The Solar Heating System

    Working principle of the water heater 2.5.1 Unvented installation With an unvented installation, an expansion valve and expansion vessel prevent the buildup of excessive pressure in the tank. This prevents damage being caused to the enamel coating (in the water heater) or to the tank. A non-return valve prevents excessive pressure build-up in the water supply system.

  • Page 22: Safety Of The Solar Heating System

    Safety of the solar heating system 2.7.1 Expansion vessel The solar heating system must be equipped with an expansion vessel. An expansion vessel serves to limit pressure variations in the system. The expansion vessel in the solar heating system can withstand a maximum pressure of 600 kPa (6 bar).
  • Page 23 Working principle of the water heater Instruction manual SGS...

  • Page 24: Installation

    Installation Warning The installation must 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 brigade. The appliance may only be installed in a room that complies with the requirements stated in national and local ventilation regulations (1.3 "Regulations").
  • Page 25 Installation 3.3.1 Air humidity and ambient temperature The boiler room must be frost-free, or be protected against frost. The table shows the ambient conditions that must be adhered to for correct functioning of the electronics present in the appliance to be guaranteed. Air humidity and ambient temperature specifications Air humidity and ambient temperature Air humidity...

  • Page 26: Technical Specifications

    Working clearances IMD-0766 R0 SGS 28 thru 60 SGS 80 thru 120 Note When installing the water heater, be aware that any leakage from the tank and/or connections can cause damage to the immediate environment or floors below the level of the boiler room. If this is the case, the water heater should be installed above a waste water drain or in a suitable metal leak tray.
  • Page 27 3.4.1 Dimensions of the water heater Top and front view of the appliance Legend SGS 28, 30, 50, 60 SGS 80, 100, 120 See the table.
  • Page 28 Dimensions (all dimensions in mm, unless otherwise stated) Size Description Unit SGS 28 SGS 30 SGS 50 SGS 60 SGS 80 SGS 100 SGS 120 2015 2015 2060 2060 2060 Overall height 1485 2015 Position on pallet Appliance diameter Depth 1000 1000 1000...
  • Page 29 3.4.2 General and electrical specifications DESCRIPTION Unit SGS 28 SGS 30 SGS 50 SGS 60 SGS 80 SGS 100 SGS 120 Contents litres Empty weight Maximum floor load Maximum operating pressure (vented) kPa (bar) 800 (8) 800 (8) 800 (8) 800 (8) 800 (8) 800 (8)
  • Page 30 DESCRIPTION Unit Value Maximum mains pressure of cold water supply (vented) kPa (bar) 800 (8) Maximum mains pressure of cold water supply kPa (bar) 550 (5.5) (unvented) Maximum mains pressure of the protected cold supply kPa (bar) 500 (5) setup T&P overflow pressure kPa (bar) 700 (7)
  • Page 31 3.4.3 Gas data description Unit SGS 28 SGS 30 SGS 50 SGS 60 SGS 80 SGS 100 SGS 120 2H3P Gas category 2H: G20 - 20 mbar Diameter of the venturi restrictor 8,60 8,60 8,60 32,2 33,3 52,2 63,3 86,6 105,5 128,8 Nominal load (gross)

  • Page 32: Installation Diagram

    Installation diagram The figure shows the Installation diagram. This diagram is referred to in the sections describing the actual connection procedure. Installation diagram Legend UNVENTED Unused numbers are not applicable pressure reducing valve (mandatory) inlet combination (mandatory) T&P valve stop valve (recommended) non-return valve (mandatory) circulation pump (optional), pump flow 1500 litres/hour,...

  • Page 33: Unvented Water Connections

    Installation Unvented water Warning The installation should be carried out by a competent person, in compliance connections with general and locally applicable regulations (1.3 "Regulations"). 3.6.1 Cold water side See (A) in the installation diagram (3.5 "Installation diagram"). 1. Fit an approved stop valve (4) on the cold water side as required by the applicable regulations (1.3 "Regulations").

  • Page 34: Gas Connection

    3.7.1 Cold water side See (A) in the installation diagram (3.5 "Installation diagram"). 1. Fit an approved stop valve (4) on the cold water side between the cold water head tank (18) and the water heater, as required by applicable regulations. 3.7.2 Hot water side See (B) in the installation diagram (3.5 "Installation diagram").

  • Page 35: Solar Heating System

    Installation See (D) in the installation diagram (3.5 "Installation diagram"). 1. Fit a manual gas valve (10) in the gas supply pipe. 2. Blow the gas pipe clean before use. 3. Close the manual gas valve. 4. Fit the gas supply pipe to the gas control valve. Warning After fitting, check for leaks.
  • Page 36 This manual discusses installation types C13 and C33 in detail. If the water heater has to function in accordance with B23, C43, C53 or C63, you can obtain more information by contacting A.O. Smith. The figure and table give information about these types of installation. For an explanation of the possibilities, please contact the manufacturer.
  • Page 37 Installation Installation types Instruction manual SGS...
  • Page 38 Explanation of types of installation Installation type Description Air for combustion is drawn from the boiler room. Concentric and/or parallel wall flue terminal. Concentric and / or parallel roof flue terminal Water heaters on common air supply and flue gas discharge (concentric and/or parallel) in multi-storey building.

  • Page 39: Specifications

    Installation Practical example of concentric flue gas discharge Example The figure shows a SGS 30 installation. The water heater must be fitted with 25 m of concentric pipe (C13/C33) and four 90 degree bends. The configuration must be checked for compliance with the requirements stated in the table. Water heater with concentric flue gas discharge material IMD-0791 R0 According to the table, the maximum length allowed is 40 metres, and there may...
  • Page 40 Concentric roof flue terminal specifications C33 Subject Description 0311 460 Roof conduit set: Art. No. SGS 28, 30, 50, 60 • 1x roof conduit (incl. clamping 0311 461 SGS 80, 100, 120 ring) Manufacturer Muelink & Grol • 1x Pipe 1000 mm Skyline 3000 (28-60) and Mugro 2000 (80-120) Type •...

  • Page 41: Electrically Connecting The Water Heater

    Installation Practical example of parallel flue gas discharge Example The figure shows a SGS 30 installation. This has to be fitted with a 10 m parallel pipe of 100 mm diameter, and eight 90 degree bends. The configuration must be checked for compliance with the requirements stated in the table. Appliance with parallel flue gas discharge material The longest pipe must be used to check the maximum length.
  • Page 42 Connecting the solar heating system is also described: • Connecting communication cable to solar heating system Note The optional components are not included in the electrical power consumption rating stated in the table (3.4.2 "General and electrical specifications"). 3.11.2 Preparation Caution The water heater is phase-sensitive.
  • Page 43 Installation In preparation, you must first remove the two covers, and the cover of the electrical section. 1. Undo the screws of the covers. 2. Carefully remove the covers from the water heater. The electrical section is now visible. 3. Loosen the 2 screws (A) and remove the cover (B) from the electrical section.

  • Page 44: Isolating Transformer

    3.11.4 Isolating transformer An isolating transformer should be used if there is a case of 'floating neutral'. Note The total power consumed by the appliance goes via the isolating transformer. 1. Refer to the fitting instructions provided with the isolating transformer. (Contact the supplier for details of the correct isolating transformer.) 2.

  • Page 45: Electrical Connection Of The Solar Heating System

    Installation 3. If you have no more connections to make: Fit the cover on the terminal block. Fit the covers onto the water heater. 3.11.8 Connecting communication cable to solar heating system You must connect a communication cable between the controllers of the water heater and the solar heating system.
  • Page 46 3.12.2 Connecting the mains power Note Just as with the water heater controller, the solar heating system controller must have a permanent electrical connection to the mains power supply. There must be a double-pole isolator installed in the permanent connection. This is the same double-pole isolator as installed between the mains power supply and the water heater itself.
  • Page 47 Installation 3.12.7 Connecting communication cable Note >The communication cable must always be connected, otherwise neither the appliance nor the solar heating system controller will run. 1. Connect the double connector to J16. 2. Fit the cable in the strain relief. 3.

  • Page 48: Check The Supply Pressure, Gas Control Valve Pressure, Co 2 Value And Switching Pressure

    3.13 Check the supply Note Before starting to use the appliance and/or checking the supply pressure pressure, gas and/or the CO value and/or the switching pressure, you should first control valve fill (5 "Filling") the appliance. pressure, CO value and switching Caution pressure When starting up for the first time or after conversion, you must always...
  • Page 49 Installation SGS 80 to 120 5. The gas control valve has a test nipple that can be used for measuring the supply pressure. This test nipple has a sealing screw. Loosen the sealing screw by a few turns. Do not completely loosen it as it can be difficult to retighten. IMD-1097a R0 6.
  • Page 50 13. Use the pressure gauge to read the supply pressure and compare it against the value from the gas table (3.4.3 "Gas data"). Note Consult the mains gas supply company if the supply pressure is not correct. You cannot yet start using the appliance. You must now take the appliance out of service (10.3 "Isolating the water heater from the mains").
  • Page 51 Installation 10. Confirm with The display shown here will appear. SERVICE OPERATION FULL LOAD »PARTIAL LOAD The appliance is now in "PARTIAL LOAD" mode and will ignite. 11. You must wait about 1 minute after the display shows the text RUNNING before reading the dynamic pressures (the fan needs this time to get up to full speed, so that a reliable reading can be obtained).
  • Page 52 Full-load measurement 10. From the service menu, select: SERVICE OPERATION | FULL LOAD Confirm with The appliance is now in "FULL LOAD mode" and will ignite. SERVICE Ê Ê FULL LOAD 65ÉC Tset 70ÉC RUNNING 11. The appliance is now running at FULL LOAD. Read the value from the CO meter and wait until this measured value has remained stable for some time.
  • Page 53 Installation SGS 80 to 120 16. If the measure value is within the range given in the table of CO values: If you have increased Tset, set it back to the original value using Continue with the CO measurement under partial load. 17.
  • Page 54 SGS 80 t/m 120 - CO adjustment (partial load) IMD-1097b R0 Note Turning to the left (anticlockwise) means more less (lower CO level) and turning to the right (clockwise) means more gas (higher CO level). Note After conversion, you must check that the gas control valve is gastight. 23.
  • Page 55 Installation 10. Read the pressure from the meter at the moment when the appliance switches from PRE PURGE to PRESSURE SWITCH. At this point, the appliance's display will show: Ê Ê Ê 13:45 Thursday 63ÉC Tset 65ÉC PRESSURE SWITCH 11. Check whether the measured value matches the value from the table (3.4.3 "Gas data").

  • Page 56: Conversion To A Different Gas Category

    Conversion to a different gas category Introduction Caution The conversion may only by carried out by a competent person. If the appliance has to operate on a different family of gases (liquid petroleum gas or natural gas) or gas category other than that for which the appliance has been configured at the factory, then the appliance will have be adapted using a special conversion kit.
  • Page 57 Conversion to a different gas category Instruction manual SGS...

  • Page 58: Filling

    Filling Installation diagram Legend Vented and unvented UNVENTED Unused numbers are not applicable pressure relief valve (mandatory if the mains water pressure is too high) T&P valve stop valve (recommended) non-return valve (mandatory) circulation pump (optional) drain valve manual gas valve (mandatory) service stop valve temperature gauge (optional)

  • Page 59: Filling Vented Installations

    Filling 7. The water heater is now under water supply pressure. There should now be no water coming out of the inlet combination expansion valve or (if used) out of the T&P valve (3). If there is, the cause might be: The water supply pressure is greater than the specified value (3.4.2 "General and electrical specifications").
  • Page 60 Warning To avoid contaminating the glycol, you should flush the solar heating system through with water before filling. 5.3.1 Flushing with water 1. Connect a water supply to the filling point of the pump station. 2. Connect a drain hose to the drain point. 3.
  • Page 61 Filling 13. Close the valve of the inlet combination and disconnect the glycol pump (including the hoses). Note Dispose of the residual glycol in the filler hose in an environment-friendly manner, and according to local regulations. Instruction manual SGS...

  • Page 62: Draining

    Draining Installation diagram Legend Vented and unvented UNVENTED Unused numbers are not applicable pressure relief valve (mandatory if the mains water pressure is too high) T&P valve stop valve (recommended) non-return valve (mandatory) circulation pump (optional) drain valve manual gas valve (mandatory) service stop valve temperature gauge (optional)

  • Page 63: Draining Vented Installations

    Draining 5. Switch the water heater OFF (position 0) using the ON/OFF switch on the control panel. 6. Isolate the water heater from the power supply by setting the isolator between the water heater and the mains power supply to position 0. 7.
  • Page 64 5. Switch off the solar heating system. 6. Connect a hose to the lowest drain point in the solar heating system. 7. Insert the hose into the glycol jerry can. 8. Open the valve of the lowest drain point. 9. Open the air bleed point (26) of the solar heating system. 10.
  • Page 65 Draining Instruction manual SGS...

  • Page 66: The Control Panel

    The control panel Introduction Explanation of icons This chapter covers the following topics: The table explains the meanings of the icons. • Control; Icons and their meaning • Explanation of icons; Name Explanation • ON/OFF switch on controller; • Navigation buttons; Heat demand Heat demand detected...

  • Page 67: Pc Connection

    The control panel The arrows ^ and È indicate that you can scroll up and/or down. Use the buttons to scroll. MENU ^»ON È WEEK PROGRAM EXTRA PERIOD SETTINGS The cursor » points to the option to be activated. In the display as shown in the figure, you can scroll through the main menu.

  • Page 68: Status Of The Water Heater

    Status of the water heater Introduction 8.2.2 This chapter covers the following topics: In this mode, the water heater continually responds to the hot water demand. The figure shows the display • Operating modes; with the following information: • Error conditions; •...

  • Page 69: Error Conditions

    Status of the water heater 8.2.4 Error conditions PROG In this mode a preset week program is active, and the The figure shows an example of an error condition. water heater responds continually to demand within If the water heater enters this condition, the display the time periods set in the week program.

  • Page 70: Service Condition

    Service condition Collector temperature warning The figure shows the message This message appears whenever the collector temperature is too high. This message disappears WARNING automatically. If the message does not disappear, you must contact your service and maintenance engineer. MAX. BURNING HOURS: SERVICE REQUIRED WARNING TEMPERATURE...
  • Page 71 Status of the water heater Instruction manual SGS...

  • Page 72: Starting The Water Heater

    Starting the water heater Introduction 5. Press once on the blue arrow ( ) to position the cursor beside ON, then press . The This chapter covers the following topics: display shown in the figure will appear. • Starting the appliance. •...
  • Page 73 Starting the water heater When the water heater starts, it will run through the 5. After a number of seconds pre-glow, the gas following steps: control valve is opened and ignition takes place. 1. The water temperature drops below the set The icon is activated.

  • Page 74: Shutting Down

    Shutting down 10.1 Introduction 10.3 Isolating the water heater from the mains This chapter describes: The water heater may only be isolated from mains • Decommissioning the water heater for a short power in the correct way. The correct procedure is as period.
  • Page 75 Shutting down Instruction manual SGS...

  • Page 76: Main Menu

    Main menu 11.1 Introduction 11.2 Notation convention for menu-related instructions The MENU is reached by pressing the button on the controller. The MENU ( ) of the controller is divided into sub- menus. For example, SETTINGS is one of the MENU functions reached from the main menu.

  • Page 77: Week Program

    Main menu 2. Use: 11.6 Starting and stopping the week program • to increase the value; The week program can be started up from any other • to decrease the value. operating mode, as follows: • Confirm with .After confirming, the water heater enters "ONmode".
  • Page 78 The display shows the menu for the week program, 3. Use to set the hours. In the example, this see the figure below. With the default setting, the is 08. program switches on and off every day at 00:00 and Confirm with 23:59 respectively, the water temperature is 65ºC and The cursor moves to the minute digits, which will...

  • Page 79: Adding Times To A Week Program

    Main menu 11.7.3 Week program: setting the water 11.8 Adding times to a week program temperature Call up the menu to INSERT switch-on and switch-off times into a week program as follows: 1. Use to set the water temperature. In the example this is 75°C.

  • Page 80: Deleting Times From A Week Program

    3. Proceed as follows: To warn you that you are now working in the delete sub-menu, the cursor is replaced with an a. Set the switch-on time (11.7.1 "Week program: exclamation mark (!) and the period settings will setting the switch-on time"). blink.

  • Page 81: Extra Period

    Main menu 6. Scroll with to START OPERATION. 2. Use to set the switch-on hour to the desired value. In the example, this is 08. Confirm with Confirm with The week program is active. The cursor moves to the minute digits, which will 11.10 Extra period blink.

  • Page 82: Settings

    Setting the water temperature 11.11.1 Setting menu language 1. Use to set the water temperature. In the To set menu language: example this is 75°C. MENU Confirm with WEEK PROGRAM The cursor moves to PUMP ON ^ EXTRA PERIOD È»SETTINGS SU 08:15 SU 12:45 1.
  • Page 83 Main menu 3. Scroll with to DAY/TIME 11.11.3 Displaying water heater specifications Confirm with SETTINGS Note LANGUAGE This category is solely intended for the installation ^»DAY/TIME engineer and/or service and maintenance engineer. È SPECIFICATIONS Call up the menu to display the water heater The display shows the sub-menu for adjusting the specifications as follows: day.

  • Page 84: Service Program

    Service program 12.1 Introduction Please refer to the table (3.4.2 "General and electrical specifications") for the regulation interval and settings The service program is used by the installation for each water heater. engineer or service and maintenance engineer for: 12.3 Displaying the error history •...

  • Page 85: Display The Selected Water Heater

    Service program Call up the menu for displaying the water heater :SERVICE OPERATION to display the history as follows: SERVICE OPERATION menu. • : APPLIANCE HISTORY SERVICE OPERATION The figure shows an example. »FULL LOAD PARTIAL LOAD APPLIANCE HISTORY BURNINGHOURS 000410 can be used to switch between PARTIAL ^IGNITIONS 001000...

  • Page 86: Setting Legionella Prevention

    7. Press twice to return to the MENU menu via the • Now set the day and time the same way as SERVICE OPERATION menu. described for setting an extra period in the week menu (11.10.1 "Programming an extra period"). In MENU this case however, the pump will be automatically »OFF...

  • Page 87: Setting The Central Heating Configuration

    Service program 12.9.3 Setting the solar limit 12.9.6 Displaying contribution The solar limit temperature is the maximum water This option enables you to read out how much energy temperature obtained in the appliance via the solar the solar heating system supplies. For this data to be heating system (measured by sensor T displayed, the installation must be equipped with a Q/T sensor (12.9.5 "Setting the Q/T sensor").

  • Page 88: Errors

    Errors 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 manual includes (13.2 "Troubleshooting table for general errors") a table with general errors.

  • Page 89: Troubleshooting Table For General Errors

    13.2 Troubleshooting table for general errors Warning Maintenance may only be performed by a qualified service and maintenance engineer. General errors Indication Cause Measure Remark Gas smell Gas leak Warning Warning Close the main gas valve at once. Immediately contact your installation engineer or local gas company.
  • Page 90 Indication Cause Measure Remark Water leakage Leakage from a water Tighten the threaded connection If the leak persists, consult your installation engineer connection (threaded) Condensate leakage Check that the condensation water discharge is working properly. Rectify if necessary Leakage from another Trace the leak nearby water water heater or pipe segment...
  • Page 91 Indication Cause Measure Remark Glycol leakage Leakage from a fluid Tighten the threaded connection. If the leak persists or a component needs replacement, consult connection (threaded) your installation engineer Leakage from a 1. Tighten component joints component 2. Any defective components must be replaced Leakage from solar Consult the supplier and/or manufacturer heating system...

  • Page 92: Troubleshooting Table For Displayed Errors

    13.3 Troubleshooting table for displayed errors Displayed errors Code + description Cause Measure Remark S01 (blocking error) Sensor is not (correctly) Connect the sensor lead to JP3 See the electrical diagram (17 "Appendices"). connected Open circuit from Damaged cable and/or Replace the cable and/or sensor.
  • Page 93 Code + description Cause Measure Remark S07 (blocking error) Sensor is not (correctly) Connect the sensor lead to J14 (ports 2 and 4) of the solar See the electrical diagram (17 "Appendices"). connected controller Open circuit from Damaged cable and/or Replace the cable and/or sensor.
  • Page 94 Code + description Cause Measure Remark S15 (blocking error) Short circuit in sensor Replace the dummy sensor To replace the necessary parts, you must contact your installation circuit engineer Short circuit from dummy 2 S17 (blocking error) Short circuit in sensor Replace the cable and/or sensor.
  • Page 95 Code + description Cause Measure Remark Damaged wiring 1. Check the wiring between the fan and the controller. 2. If any wires are damaged, the wiring harness must be replaced. 3. Reset controller Contaminated or 1. Check if the fan is dirty and repair it if necessary. If the error cannot be resolved or is persistent, contact your blocked fan installation engineer...
  • Page 96 Code + description Cause Measure Remark F03 (lock out error) Damaged wiring/Open 1. Check the wiring between the pressure switch and the If the error cannot be resolved or is persistent, contact your circuit installation engineer controller The pressure switch To replace the necessary parts, you must contact your installation 2.
  • Page 97 Code + description Cause Measure Remark F04 (lock out error) No gas 1. Open the main gas supply valve and/or the manual gas supply To restore the gas supply, contact your installation engineer valve before the gas control valve Three unsuccessful 2.
  • Page 98 Code + description Cause Measure Remark F06 (blocking error) Damaged cable in Check the wiring and the flame probe. Replace the wiring and/or If the error persists, contact your installation engineer. contact with metal flame probe if necessary. To replace the necessary parts, you must contact your installation surface or bent flame Short circuit between engineer...
  • Page 99 Code + description Cause Measure Remark F19 (blocking error) There is not enough 1. Check that there is power to the controller See the electrical diagram (17 "Appendices"). supply voltage. If the error persists, consult your installation engineer 2. The measured voltage must be 230 V (-15%, +10%) Power supply voltage is too low.
  • Page 100 Code + description Cause Measure Remark C04 (blocking error) Incorrect water heater 1. Check whether the correct water heater is If the error cannot be resolved or is persistent, contact your selection/Incorrect installation engineer selected (3.4.2 "General and electrical specifications"). selection resistor Appliance selection To replace the necessary parts, you must contact your installation...

  • Page 101: Warnings On The Display

    13.4 Warnings on the display Warnings on the display Situation Cause Measure Note Q/T sensor not Lead(s) loosened or Appliance runs, but displays a warning. 1. Properly connect Q/T sensor and the warning will disappear correctly connected incorrectly connected 2. If correctly wired but the warning remains, replace sensor Caution: To have the sensor connected or replaced, contact your installation engineer Collector temperature...

  • Page 102: Service Interval

    Service interval 14.1 Introduction A service should be carried out at least once a year, both on the water side and on the gas side. Among other things, the service interval depends on the water quality, the average burning time per day and the set water temperature. Note Regular maintenance extends the service life of the water heater.
  • Page 103 Service interval Instruction manual SGS...

  • Page 104: Performing Maintenance

    Performing maintenance 15.1 Introduction Caution Maintenance may only by carried out by an approved service and maintenance engineer. At each service, the water heater undergoes maintenance on both the water side and the gas side. The maintenance must be carried out in the following order.

  • Page 105: Water-Side Maintenance

    Performing maintenance The display will now show INTERNAL CHECK for about 10 seconds, and will then go to the main menu. MENU »OFF ^ ON È WEEK PROGRAM 7. Activate "ON mode" by going through the following steps: Press once on the blue arrow ( ) to position the cursor beside ON, then press Confirm the selection START OPERATION with 8.

  • Page 106: Gas-Side Maintenance

    To simplify descaling and cleaning of the tank, the water heater is equipped with two cleaning openings. IMD-0080 R1 1. Remove the cover plate (1) on the outer jacket (see the figure). 2. Undo the bolts. 3. Remove the cover and the gasket. 4.

  • Page 107: Solar Collector Maintenance

    Performing maintenance 6. Fit the chimney flue. Note Check the pressure differential again after cleaning. If the pressure differential is too low following cleaning, please contact the supplier of the water heater. 15.5 Solar collector See installation or users' manual for the solar collector. If this topic is not covered in the manual, then contact the supplier of the collectors.

  • Page 108: Warranty (Certificate)

    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 an appliance supplied by A.O.Smith Water Products Company B.V. of Veldhoven, Netherlands (hereinafter "A.O.Smith") the right to the warranty set out below, defining the commitments of A.O.Smith to the owner.

  • Page 109: Exclusions

    Warranty (certificate) The water heater 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 power anodes are used, it is important to ensure that they continue to work properly.

  • Page 110: Appendices

    Appendices 17.1 Introduction This appendix contains: • Menu structure of the main menu (17.2 "Menu structure") • Appliance electrical diagram (17.3 "Electrical diagram for the appliance") • Electrical diagram, solar heating system (17.4 "Electrical diagram, solar heating system") • Declaration of conformity (17.5 "Declaration of conformity") •...

  • Page 111: Menu Structure

    Appendices 17.2 Menu structure CONTROL SERVICE MAIN MENU PROGRAM HYSTERESE HYSTERESE DOWN HISTORY START OPERATION OF ERRORS CHANGE SETPOINT APPLIANCE HISTORY WEEK- PROGRAM SELECT APPLIANCE START OPERATION SERVICE INTERVAL PROGRAM OVERVIEW SERVICE OPERATION EXTRA PERIOD FULL LOAD SETTINGS PARTIAL LOAD LANGUAGE ANTI LEGIONELLA DAY/TIME...
  • Page 112 Instruction manual SGS...

  • Page 113: Electrical Diagram For The Appliance

    Appendices 17.3 Electrical diagram Electrical diagram for the appliance X J2 JP11 JP12 21 22 23 Primair Secundair 230VAC 50Hz 0309 687a R0 230VAC 50Hz 1 = brown, 2 = blue, 3 = green, 4 = black, 5 = white, 6 = grey / beige, 7 = green, 8 = yellow Instruction manual SGS...
  • Page 114 TERMINAL STRIP CONNECTIONS CONTROLLER CONNECTIONS Earth Power connection for controller Neutral Extra error signal connection Live input of controller Gas control valve connection Live input of isolating transformer (primary Program-controlled pump connection side) Power connection for the fan Live output of isolating transformer Controller display connection (secondary side) Regulator connection for the fan...

  • Page 115: Electrical Diagram, Solar Heating System

    Appendices Electrical diagram, see Eratta. 17.4 Electrical diagram, solar heating system DD EE 230VAC 50Hz 0309 687b R0 1 = brown, 2 = blue, 3 = green, 4 = black, 5 = white, 6 = grey / beige, 7 = green, 8 = yellow Instruction manual SGS...
  • Page 116 TERMINAL STRIP CONNECTIONS Earth Neutral Live input of controller Live input for the solar heating system pump ON/OFF. Live input for the solar heating system modulating pump. Neutral input for the solar heating system modulating pump. Modulation output of the solar heating system modulating pump COMPONENTS Control...

  • Page 117: Declaration Of Conformity

    Appendices 17.5 Declaration of Declaration of conformity conformity Instruction manual SGS...

  • Page 118: Week Program Card

    17.6 Week program card You can cut the week program card out and keep it near the water heater. Period TIME Tset Pump Period TIME Tset Pump ..°C ON / OFF ..°C ON / OFF ..°C ON / OFF ..°C ON / OFF ..°C ON / OFF...
  • Page 119 Instruction manual SGS...
  • Page 120 Index actuation 73 maintenance ambient conditions 21 condensation water discharge 103 ambient temperature 22 descaling 102 gas-side 103 heat exchanger 103 preparation 101 claims 106 scale 102 connecting the air supply 32 mode connecting the chimney flue 32 ERROR 66 connecting the circulation pipe 30, 31 SERVICE REQUIRED 67 connecting the cold water side 30, 31...
  • Page 121 Index symbol installation engineer 10 user 10 service engineer 10 user 10 warranty 105 exclusions 106 target groups 10 General information 105 terminal block 39 installation and conditions of use 105 ThermoControl scope 106 ON/OFF switch 63 water heater trademarks 3 displaying history 81 displaying the selection 82 types 9, 21...

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