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A.O. Smith SGS - 100 Installation & Service Manual

A.o. smith gas water heater installation user and service manual
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  • Page 1 Installation Installation User and User and Service Manual Service Manual...
  • Page 2 www.aosmithinternational.com your installer...
  • Page 3 Any brand names mentioned in this manual are registered trademarks of their respective owners. Liability A.O. Smith water Products Company accepts no liability for claims from third parties arising from improper use other than that stated in this manual and in accordance with the General Conditions registered at the Eindhoven Chamber of Commerce.
  • Page 4 Instruction manual SGS...

  • Page 5: Table Of Contents

    Table of contents Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 About the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 What to do if you smell gas- - - - - - - - - - - - - - - - - - - - - - - - - 9 Regulations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 Target groups - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10...
  • Page 6 Table of contents PC connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 56 Status of the appliance - - - - - - - - - - - - - - - - - - - - - 57 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 57 Operating modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 57 EXTRA - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 57...
  • Page 7 16.7 Obligations of A.O. Smith - - - - - - - - - - - - - - - - - - - - - - - - 98 Appendices- - - - - - - - - - - - - - - - - - - - - - - - - - - 99 17.1...
  • Page 8 Table of contents Instruction manual SGS...

  • Page 9: Introduction

    Introduction About the appliance This manual describes how to install, service and use the SGS appliance. The SGS appliance is a condensing boiler with a fan in the air intake. The appliance is always supplied including a storage tank fitted with a heat exchanger connected to a solar energy source.

  • Page 10: Target Groups

    Introduction Furthermore, the installation must comply with the manufacturer's instructions. guidelines published on or prior to the moment of installing, will apply to the installation. Target groups The three target groups for this manual are: • • • Symbols on each page indicate the target groups for whom the information is intended.

  • Page 11: Overview Of This Document

    Overview of this document Chapter Target groups Working principle of the appliance Installation Conversion to a different gas category Filling Draining The control panel Status of the appliance Starting and running Shutting down Main menu Service program Troubleshooting Maintenance frequency Performing maintenance Warranty (certificate) Instruction manual SGS...
  • Page 12 Introduction Instruction manual SGS...

  • Page 13: Working Principle Of The Appliance

    Working principle of the appliance Introduction Topics covered in this chapter: • • • • • General working The figure shows a cut-away view of the appliance. principle of the In this appliance, the cold water enters the bottom of the tank through the cold appliance water inlet (14).

  • Page 14: The Appliance's Heating Cycle

    Working principle of the appliance Cut-away view of the appliance Legend Only applicable numbers are mentioned. 1. cover 2. hot water outlet 3. electrical connector block 4. electronic controller 5. pressure switch 6. control panel 7. temperature sensor T 8. combustion chamber 9.

  • Page 15: Protection For The Appliance

    • • • Graphical representation of heating cycle Legend A = Gas burner on B = Gas burner off • = no heat demand, so water not heated • = water heated via solar heating system • = water heated via solar Solar diff.
  • Page 16 Working principle of the appliance 2.4.2 Appliance water temperature protection The electronic controller uses temperature sensors T several temperatures that are important for safety. The table explains the functioning of these temperature sensors. Temperature protection Protection Description Against frost: The frost protection cuts in. The water is heated to 20°C. <...

  • Page 17: Safety Of The Installation

    2.5.3 T&P valve A T&P valve is only mandatory in an unvented installation. However, A.O. Smith also recommends the use of a T&P valve in vented installations. A T&P (Temperature and Pressure Relief) valve monitors the pressure in the tank and the water temperature at the top of the tank.
  • Page 18 Working principle of the appliance appliance is under water supply pressure, cold water will automatically flow into the tank. The valve remains open until the unsafe situation has been rectified. The appliance is fitted standard with a connecting point for a T&P valve 2.5.4 Protection for the solar heating system...

  • Page 19: Installation

    Installation in compliance with the general and local regulations imposed by the gas, water and power supply companies and the fire service. The appliance may only be installed in a room that complies with the requirements stated in national and local ventilation regulations Introduction This chapter describes the installation activities to be carried out before you...
  • Page 20 (alkaline earth ions) Conductivity Acidity (pH value) tank protection cannot be guaranteed If the water hardness is greater than 4° dH, please contact A.O. Smith. max. 93% RV at +25°C Functional: 0 < T < 60°C 940 kg > 1.00 mmol/l: •...
  • Page 21 3.3.4 Appliance working clearances For access to the appliance, it is recommended that the following clearances are observed: • • • damage to the immediate environment or floors below the level of the boiler room. If this is the case, then the appliance should be installed above a wastewater drain or in a suitable metal leak tray.

  • Page 22: Technical Specifications

    Installation Technical The appliance is supplied without accessories. Check the dimensions specifications and other specifications accessories you plan to use. 3.4.1 Dimensions of the appliance Plan and elevation of the appliance Legend See the table. (3.4.1 "Dimensions of the appliance"), gas data (3.4.2 "General and electrical specifications") 11”...
  • Page 23 Dimensions (all measurements in mm unless otherwise indicated) Dimen Description sion Total height Position on pallet Appliance diameter Depth Width Diameter of flue gas outlet Height of flue gas outlet/air supply x position of flue gas outlet y position of flue gas outlet Height of gas connection Height of cold water supply Height of hot water outlet...
  • Page 24 Installation 3.4.3 Gas data Gas data Description II 2H3+ Natural gas Gas category G20-20 mbar Orifice diameter Nominal load (gross calorific value) Nominal output Supply pressure Burner pressure Gas consumption LP gas Gas category G31-37mbar (propane) Orifice diameter Nominal load (gross calorific value) Nominal output Supply pressure (†)

  • Page 25: Installation Diagram

    Installation diagram This figure shows the installation diagram. This diagram is used in the sections in which the actual connection process is described. Installation diagram Instruction manual SGS...

  • Page 26: Water Connections, Vented

    Installation Legend Only applicable numbers are mentioned. 1. pressure-reducing valve (mandatory if the mains water pressure exceeds 8 bar) 3. T&P valve (mandatory) 4. stop valve (recommended in pipe C and mandatory in pipe A) 5. non-return valve (mandatory) 6. circulation pump (optional) 9.

  • Page 27: Water Connections, Unvented

    3.6.3 Circulation pipe See (C) in the installation diagram If an immediate flow of hot water is required at draw-off points, a circulation pump can be installed. This improves comfort and reduces water wastage. 1. Fit a circulation pump (6) of the correct capacity for the length and resistance 2.

  • Page 28: Gas Connection

    Installation 3.7.4 Condensation drainage 1. Fit a sloping wastewater pipe to the siphon (13) for condensation drainage Gas connection in compliance with general and local regulations enough to supply sufficient capacity to the appliance. See (D) in the installation diagram 1.
  • Page 29 3.10.2 Requirements for flue gas discharge materials in compliance with general and local regulations Depending on the approved installation types, there are several alternatives for connecting the air supply and flue gas discharge. The appliances are approved for installation types B23, C13, C33, C43, C53 and C63.
  • Page 30 Installation Types of appliances IMD-0468 R0 Instruction manual SGS...
  • Page 31 Explanation of type of appliance Type of appliance Description Air for combustion is drawn from the boiler room. Concentric and / or parallel wall flue terminal Concentric and / or parallel roof flue terminal Appliances on common air supply and flue gas discharge (concentric and / or parallel) in multi-storey building.

  • Page 32: Specifications

    Use of an incorrect roof or wall-mounted flue terminal can cause the installation to malfunction. Caution For type C13 and C33 installations,A.O. Smith prescribes the use of a roof Instruction manual SGS...
  • Page 33 Concentric wall flue terminal specifications C13 Subject Wall flue terminal set: • 1x wall flue terminal (incl. wall flange & clamping ring) • 1x pipe 500mm • 1x bend 90° Pipe material Pipe diameters No other wall flue terminal is permitted. Use this item number to order the wall conduit set from supplier, manufacturer or wholesaler.
  • Page 34 Installation Appliance SGS 80 SGS 100 1) Parallel systems with diameter of 130mm or 150mm. If the maximum total length for a diameter of 130mm is insufficient, 150mm diameter should be used. Any diameter enlargement must be carried out on both air supply and flue gas discharge.

  • Page 35: Electrical Connection

    3.11 Electrical connection in compliance with general and local regulations 3.11.1 Introduction Topics covered in this paragraph: • • Optionally, it is possible to connect an isolating transformer, a continuous pump, a program-controlled pump, an extra ON mode switch and an extra alarm signal to the appliance.
  • Page 36 Installation Connector block Legend A. screws B. protective cap C. connector block In preparation, you must first remove the two plastic covers and the protective cap of the electrical section. 1. Undo the screws of the plastic covers. 2. Carefully remove the covers from the appliance. 3.

  • Page 37: Isolating Transformer

    3.11.3 Connecting the mains voltage The appliance is supplied without a power cable and isolator. mains power by means of a permanent electrical connection. A double-pole isolator with a contact gap of at least 3 mm must be fitted between this permanent connection and the appliance.

  • Page 38: Electrically Connecting The Solar Heating System Controller

    Installation 3.11.7 Connecting an extra error signal ('Alarm OUT' ) Alarm OUT is a potential free terminal that is switched when an error is detected. This can be used to signal errors, for example with a lamp. A 230 V circuit can be directly powered.
  • Page 39 3.12.2 Connecting the mains power 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 appliance itself.
  • Page 40 Installation 3.12.7 Connecting communication cable 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. Connect the other end of the communication cable to the terminal block of 4.

  • Page 41: Checking The Supply Pressure And Burner Pressure

    3.13 Checking the supply pressure and burner burner pressure, you must fill pressure check the supply pressure and burner pressure. gauges. This procedure assumes that these two gauges are available. Gas control Legend Only applicable numbers are mentioned. 1. supply pressure test nipple 2.
  • Page 42 Installation 3.13.2 Procedure to check pressures 1. There are two test nipples on the gas control: 2. Connect a pressure gauge to the burner pressure nipple (2). 3. Open the gas supply and vent the gas supply line with the supply pressure 4.
  • Page 43 9. Use the pressure gauge to read the supply pressure at 1nipple 10. Use the pressure gauge to read the burner pressure at nipple If the burner pressure is not correct and the appliance is fitted with a blank plate, you will not be able to adjust the pressure.
  • Page 44 Installation Instruction manual SGS...

  • Page 45: Conversion To A Different Gas Category

    Conversion to a different gas category engineer. If the appliance must operate on a family of gases (LP gas or natural gas) or other gas category than that for which the appliance has been set at the factory, the appliance will have be adapted using a special conversion kit. conversion is complete.
  • Page 46 Conversion to a different gas category 5. Detach the 3-part gas coupling (2) adjacent to the burner. 6. Select and fit the correct orifice from the conversion kit, based on the gas 7. Refit the 3-part gas coupling (2). 8. Check the burner pressure and supply pressure 9.

  • Page 47: Filling

    Filling Installation diagram This figure shows the installation diagram. This diagram is used in the sections in which the actual connection process is described. Installation diagram Instruction manual SGS...

  • Page 48: Filling Unvented Installations

    Filling Legend Only applicable numbers are mentioned. 1. pressure-reducing valve (mandatory if the mains water pressure exceeds 8 bar) 3. T&P valve (mandatory) 4. stop valve (recommended in pipe C and mandatory in pipe A) 5. non-return valve (mandatory) 6. circulation pump (optional) 9.

  • Page 49: Filling Solar Heating System

    6. Completely fill the appliance. When a full water jet flows from the nearest 7. Bleed the entire installation of air, for example by opening all draw-off points. 8. The appliance is now under water supply pressure. There should be no Filling solar heating system 5.4.1...
  • Page 50 Filling 7. Stop the glycol pump as soon as the pressure gauge on the pump station 8. Completely bleed the system of air at the air bleed point (26, see installation 9. Close the air bleed when no further air comes out. 10.

  • Page 51: Draining

    Draining Installation diagram This figure shows the installation diagram. This diagram is used in the sections in which the actual connection process is described. Installation diagram Instruction manual SGS...

  • Page 52: Draining Unvented Installations

    Draining Legend Only applicable numbers are mentioned. 1. pressure-reducing valve (mandatory if the mains water pressure exceeds 8 bar) 3. T&P valve (mandatory) 4. stop valve (recommended in pipe C and mandatory in pipe A) 5. non-return valve (mandatory) 6. circulation pump (optional) 9.

  • Page 53: Draining Vented Installations

    6. Isolate the water heater from the power supply by putting the isolator 7. Shut off the gas supply (10). 8. Close the stop valve (11) in the hot water pipe. 9. Close the supply valve (4) in the cold water supply (A). 10.

  • Page 54: Draining Solar Heating System

    Draining Draining solar heating system 6.4.1 Draining glycol-filled system glycol solution specified by the manufacturer. For more information about the fluid, please contact the manufacturer. 1. Activate the MENU with MENU ^ ON È WEEK PROGRAM 2. Position the cursor in front of OFF. 3.

  • Page 55: The Control Panel

    The control panel Introduction Topics covered in this chapter: • Controls; • Meaning of icons; • Electronic controller ON/OFF switch; • Navigation buttons; • connection. Controls The figure shows the electronic controller. The control panel is completely menu-driven, and comprises: •...

  • Page 56: Navigation Buttons

    PC connection The PC connection is solely intended to enable technicians from A.O. Smith to display the status and history of the appliance. These details can be important for troubleshooting and/or responding to complaints.

  • Page 57: Status Of The Appliance

    Status of the appliance Introduction Topics covered in this chapter: • Operating modes; • Error conditions; • Service condition. Operating modes When running, the appliance has four basic operating modes, namely: • • • EXTRA • PROG 8.2.1 In this mode, the frost protection is activated. The figure shows the display with the following information: •...

  • Page 58: Error Conditions

    Status of the appliance 2. The current time falls outside a set time period of the week program. The figure shows the display with the following information: line one: the text PROG; line two: the time, the day and T alternately (9.3 "The appliance's heating cycle");...

  • Page 59: Starting And Running

    Starting and running Introduction Topics covered in this chapter: • Starting the appliance. • The appliance's heating cycle. Note The first time the appliance is started, you must enter (12.8 "Solar heating system configuration") settings of the solar heating system Starting the appliance Start the appliance as follows: 1.
  • Page 60 Starting and running The complete cycle is explained in the following example, which assumes the appliance is in the basic mode ON. Note The same heating cycle applies to the other operating modes. Once the appliance starts, it will run through the following steps: 1.

  • Page 61: Shutting Down

    Shutting down 10.1 Introduction This chapter describes: • Shut the appliance down for a brief period ("OFF mode"); • Electrically isolating the appliance; • Shutting the appliance down for a long 10.2 Shut the appliance down for a brief period ("OFF mode") To shut the appliance down for a brief period, you must activate the frost protection.
  • Page 62 Shutting down Instruction manual SGS...

  • Page 63: Main Menu

    Main menu 11.1 Introduction The MENU is reached by pressing the electronic controller. MENU »OFF ^ ON È WEEK PROGRAM EXTRA PERIOD SETTINGS The main menu comprises: • Select this option if you wish to turn (10 "Shutting down") the appliance for a brief period, but do not wish to drain it.

  • Page 64: Week Program

    Main menu 11.4.2 Setting water temperature during ON mode The water temperature can also be directly adjusted when the appliance is in the "ON mode". Simply use: • to increase the value; • to decrease the value. • Confirm with 13:45 Thursday 65ÉC Tset»65ÉC...
  • Page 65 The display shows the menu for the week program, see the figure below. With the default setting, the program switches on and off every day at 00:00 and 23:59 hours respectively, the water temperature is 65°C and the pump is switched on (P). DAY TIME Tset ON »SU...

  • Page 66: Adding Times To A Week Program

    Main menu 11.7.4 Week program: setting the program- controlled pump 1. If required, a pump can be controlled during the period. Use to set PUMP ON . The pump ensures a regular circulation of hot water in the hot water pipes. You can skip this step if you there is no pump in your hot water circuit.

  • Page 67: Extra Period

    11.9 Deleting times from a week program All switch-on/off times are shown sequentially in the display. Assume that the switch-on/off times for the appliance are programmed as in the figure. DAY TIME Tset ON »SU 08:15 75ÉC P OFF SU 12:45 18:00 75ÉC P OFF SU...

  • Page 68: Programming An Extra Period

    Main menu If the water temperature becomes too low during the extra period (11.11 "Programming an extra the appliance will run through the heating cycle (9.3 "The appliance's heating cycle") back into the extra period. The same settings can be made for an extra period as for a week program (11.7 "Changing the appliance's standard week program")

  • Page 69: Settings

    11.12 Settings Using the SETTINGS option, you can adjust certain settings and read certain appliance data: • Adjustable settings Language of the menu. Current day of week and time. • Displayable appliance specifications, this category is only relevant to the installation engineer and/or service and maintenance engineer Control range (water temperature).
  • Page 70 Main menu Confirm the minute setting with TIME 15»45 The time has been set. Note The appliance takes no account of daylight saving. 11.12.3 Displaying appliance specifications Note This category is solely intended for the installation engineer and/or service and maintenance engineer. The table shows the correct settings.

  • Page 71: Service Program

    Service program 12.1 Introduction The service program is used by the installation engineer or service and maintenance engineer for: • Setting the hysteresis • Displaying the error history • Displaying the appliance history • Display the selected appliance • Setting the service interval •...

  • Page 72: Display The Selected Appliance

    Service program APPLIANCE HISTORY BURNINGHOURS 000410 ^IGNITIONS 001000 ÈFLAME ERRORS 000021 IGNIT ERROR 000013 12.5 Display the selected appliance Call up the menu for displaying the appliance selection as follows: • : SELECT APPLIANCE The appliance number can be found on the rating plate.
  • Page 73 12.8.1 Setting the drain-back tank Use this menu to specify whether the solar heating system is equipped with a drain-back tank for the heating fluid. Call up the menu as follows: • :SETTINGS SOLAR | DRAIN BACK The default is NO. DRAIN BACK »NO Note...

  • Page 74: Setting The Central Heating Configuration

    Service program • : SETTINGS SOLAR | QT SENSOR QT SENSOR »NO 12.8.7 Reading the energy contribution of the solar heating system This option enables you to read out how much energy the solar heating system supplies. For this data to be displayed, the installation must be equipped with a QT sensor (12.8.6 "Setting the QT sensor...

  • Page 75: Troubleshooting

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

  • Page 76: 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 Symptom Cause Solution Gas smell Gas leak Display is off Appliance is turned off Start the appliance up No supply voltage 1.
  • Page 77 Symptom Cause Solution Water leakage Leakage from a water Tighten the threaded connection connection (threaded) Condensate leakage Check that the condensation water discharge is working properly. Rectify if necessary Leakage from another Trace the leak nearby water appliance or pipe segment Leakage from the Consult the supplier and/or manufacturer appliance's tank...
  • Page 78 Symptom Cause Solution Glycol leakage Leakage from a fluid Tighten the threaded connection. connection (threaded) 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 Instruction manual SGS Remark If the leak persists or a component needs replacement, consult...

  • Page 79: Troubleshooting Table For Displayed Errors

    13.3 Troubleshooting table for displayed errors Displayed errors Code + Description Cause Solution S01 (blocking error) Sensor is not (correctly) Connect the sensor lead to JP3 connected Open circuit from Damaged cable or Replace the sensor temperature sensor T2 defective sensor at bottom of the tank S02 (blocking error) Sensor is not (correctly)
  • Page 80 Code + Description Cause Solution S07 (blocking error) Sensor is not (correctly) Connect the sensor lead to J14 (port 2 and 4) of the solar controller See the SGS electrical diagram connected Open circuit from temperature sensor S2 Damaged cable or Replace the sensor at bottom of tank defective sensor...
  • Page 81 Code + Description Cause Solution S16 (blocking error) Short circuit in sensor Replace sensor S4 circuit. Short circuit in temp. sensor S4 at the bottom of the storage tank S17 (blocking error) Sensor is not (correctly) Replace sensor S2 connected Short circuit in temp.
  • Page 82 Code + Description Cause Solution Dirty or blocked fan 1. Check if the fan is dirty 2. Check that the rotor can rotate freely 3. Reset appliance controller Because of a drop in 1. Check the supply voltage, this must be 230 VAC (-15%, +10%). the supply voltage, the 2.
  • Page 83 Code + Description Cause Solution Heat exchanger and/or 3. Measure the pressure differential across the air pressure switch chimney flue is blocked 4. Check the values 5. Check heat exchanger, condensation drainage and/or chimney 6. Clear any blockage that may be present. 7.
  • Page 84 Code + Description Cause Solution F03 (lock out error) Damaged wiring/Open 1. Check the wiring between the pressure switch and the circuit The pressure switch 2. If necessary, replace the wiring fails to work correctly Pressure switch not 1. Check the running speed of the fan closing 2.
  • Page 85 Code + Description Cause Solution F04 (lock out error) No gas 1. Open the main gas valve and/or the manual gas valve supplying Three unsuccessful 2. Check the supply pressure to the gas control ignition attempts. 3. If necessary, repair the gas supply Air in the gas pipes Bleed the air out of the gas pipe No burner pressure...
  • Page 86 Code + Description Cause Solution F06 (lock out error) Damaged cable in Check the wiring of the flame probe. If necessary, replace the contact with metal wiring. surface. Short circuit between flame probe and earth Ceramic part of the 1. Check that the ceramic part of the flame probe is still intact in flame probe is broken/cracked.
  • Page 87 Code + Description Cause Solution F10 (lock out error) Pressure switch not 1. Check the running speed of the fan closing Restriction on the 2. Check that the hoses on the pressure switch and the air supply number of ignition attempts based on pressure switch state changes.
  • Page 88 Code + Description Cause Solution C02 (lock out error) Incorrect reference 1. Reset electronic controller. voltage from the AD 2. Check that the frequency of the power supply is converter. Error message from the appliance controller. 3. If the frequency is correct but the error persists, replace the Internal error message •...
  • Page 89 Code + Description Cause Solution E01 (blocking error) The temperature of the None. This is a temporary message that may appear from time to water at the top of the time, but will disappear automatically. tank is > 85 The temperature protection at the top of the tank has been activated.

  • Page 90: Displayed Warnings

    13.4 Displayed warnings Displayed warnings Symptom Cause Solution Q/T sensor not Lead(s) loosened or Appliance runs, but displays a warning correctly connected incorrectly connected Collector temperature Temperature S1 is The pump in the solar circuit switches off, until S1 < 70°C excessive higher than T collector...

  • Page 91: Maintenance Frequency

    Maintenance frequency 14.1 Introduction A service should be carried out at least once a year, both on the water side and on the gas side. Maintenance frequency depends, among other things, on the water quality, the average burning time per day and the set water temperature. To determine the correct maintenance frequency, it is recommended to arrange for the service and maintenance engineer to check the appliance on both the water and gas side, three months after installation.
  • Page 92 Maintenance frequency Instruction manual SGS...

  • Page 93: Performing Maintenance

    Performing maintenance 15.1 Introduction 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. and model, and the full serial number of the appliance. These details can be found on the rating plate.
  • Page 94 Performing maintenance 6. Switch the electronic controller ON by setting the ON/OFF switch to MENU ^ ON È WEEK PROGRAM 7. Activate "ON mode" by going through the following steps: 8. If there is no heat demand, increase Tset 9. Check whether the heating cycle runs correctly 10.

  • Page 95: Water-Side Maintenance

    17. Check the drain pipes from the discharge points of all valves and remove 18. Drain the appliance (see Draining). 15.3 Water-side maintenance 15.3.1 Introduction The following steps must be carried out on the water side: 15.3.2 Checking the anodes Timely replacement of the anodes extends the service life of the appliance and storage tank.

  • Page 96: Gas-Side Maintenance

    Performing maintenance 5. If the scale cannot be removed by hand, then the appliance will need to be 6. Close the cleaning opening. To avoid damage to the tank, tighten the bolts 15.3.4 Cleaning condensation water discharge Regular cleaning of the condensation drain and siphon is essential for prevention of blockages.

  • Page 97: Warranty (Certificate)

    A.O. Smith water Products Company B.V. of Veldhoven, The Netherlands (hereinafter "A.O. Smith") the right to the warranty set out below, defining the commitments of A.O. Smith to the owner. 16.1 General warranty If within one year of the original installation date of a water heater supplied by A.O.

  • Page 98: Exclusions

    Smith warranty expressly set out in this Certificate. Under the terms of the supplied warranty, A.O. Smith is not liable for damage to persons or property caused by (sections or parts, or the glass-lined steel tank of) a (replacement) water heater that it has supplied.

  • Page 99: Appendices

    Appendices 17.1 Introduction This appendix contains: • • • • Instruction manual SGS 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 heating system") Week program card (17.4 "Electrical diagram, solar...

  • Page 100: Menu Structure

    Appendices 17.2 Menu structure SERVICE MENU HYSTERESE HYSTERESE DOWN HISTORIE OF ERRORS APPLIANCE HISTORY SELECT APPLIANCE SERVICE INTERVAL ANTI LEGIONELLA SOLAR CONFIGURATION DRAIN BACK FLUID TYPE DELTA T SOLAR SOLAR LIMIT TEMPERATURE SOLAR DIFFERENCE Q/T-SENSOR CONTRIBUTION HEATING CONFIGURATION HEATING CONNECTED HEATING SETPOINT CONTROL MAIN MENU...
  • Page 101 Instruction manual SGS...

  • Page 102: Electrical Diagram For The Appliance

    Appendices 17.3 Electrical diagram Electrical diagram for the appliance 1 = brown, 2 = blue, 3 = green, 4 = black, 5 = white, 6 = grey/beige, 7 = red, 8 = dark green, 9 = yellow Instruction manual SGS...
  • Page 103 Main control components Controller Flame probe Hot surface igniter Gas control Burner earth connection Program-controlled pump Continuous pump External error signal connection Isolating transformer Double-pole isolator Controller 0/I switch Display Temperature sensor (T2 - bottom of tank) Dummy Temperature sensor (T1 - top of tank) Selection resistor Pressure switch Potentiostat...

  • Page 104: Electrical Diagram, Solar Heating System

    Appendices 17.4 Electrical diagram, Electrical diagram solar heating system 1 = brown, 2 = blue, 3 = green, 4 = black, 5 = white, 6 = grey/beige, 7 = red, 8 = dark green, 9 = yellow Instruction manual SGS...
  • Page 105 17.4.1 Solar system electrical diagram legend Solar heating system control components Controller Extra head pump for solar heating system (ON/OFF) Solar heating system pump (modulating) Temperature sensor (S1 - solar collector) Temperature sensor (S2 - storage tank) Combined Q/T sensor (incl. temperature sensor S4 - solar collector return) Controller (BUS-link)
  • Page 106 Appendices Instruction manual SGS...

  • Page 107: Week Program Card

    17.5 Week program card You can cut the week program card out and keep it near the appliance. Period TIME Example Period TIME 14:30 16:15 Instruction manual SGS Tset Pump Period ...°C ON / OFF ...°C ON / OFF ...°C ON / OFF ...°C ON / OFF...
  • Page 108 Appendices Instruction manual SGS...
  • Page 109 Index ambient temperature 20 appliance displaying history 71 displaying selection 72 types 9, 19 burner pressure 41 claims 98 connect 28 air supply 28 Alarm OUT 38 cold water side 26, 27 condensation drainage 28 electrical 35 flue gas discharge 28 gas 28 hot water side 27 isolating transformer 37...
  • Page 110 Index on/off switch 55 operating modes EXTRA 57 general 57 OFF 57 ON 57 PROG 57 packaging 19 PC connection 56 post-purge 59 power cable 37 pre-glow 59 pre-purge 59 pressure switch 17, 59 prog 57 protection 15 push buttons 55 running 59 scrolling 56 service check 10, 91...

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