A.O. Smith ADM - 40 Installation, User And Service Manual
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A.O. Smith ADM - 40 Installation, User And Service Manual

A.O. Smith ADM - 40 Installation, User And Service Manual

Commercial atmospheric water heater
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ADM
Commercial Atmospheric
Water Heater
ADM - 40/50/60/80/90/115/135
Installation, User and Service
Manual
Innovation has a name.

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  • Page 1 Commercial Atmospheric Water Heater ADM - 40/50/60/80/90/115/135 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 Liability A.O. Smith Water Products Company accepts no liability for claims from third parties arising from improper use, use other than that stated in this manual and use other than in accordance with the General Conditions registered at the Eindhoven Chamber of Commerce.
  • Page 4 Instruction manual ADM...

  • Page 5: Table Of Contents

    Table of contents Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 7 About the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7 What to do if you smell gas- - - - - - - - - - - - - - - - - - - - - - - - - 7 Regulations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7 Target groups - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8...
  • Page 6 13.7 Obligations of A.O. Smith - - - - - - - - - - - - - - - - - - - - - - - - - 62 Appendices - - - - - - - - - - - - - - - - - - - - - - - - - - - 63 14.1...

  • Page 7: Introduction

    Introduction About the appliance This manual describes how to install, service and use the ADM appliance. The ADM appliance is a gas-fired open boiler without fan. ADM appliances are equipped with a flue gas backflow safeguard. The ADM is an appliance of type B 11BS The information in this manual applies to types: ADM 40, ADM 50, ADM 60, ADM 80, ADM 90, ADM 115 and ADM 135.

  • Page 8: Target Groups

    Introduction Note Later amendments and/or additions to all regulations, requirements and 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: • (end) users; • installation engineers;...

  • Page 9: Overview Of This Document

    Overview of this The table provides an overview of the contents of this document. document Contents of this document Chapter Target groups Description Working principle of the This chapter describes how the appliance functions. appliance Installation This chapter describes the installation activity to be completed before you actually start up the appliance.
  • Page 10 Introduction Instruction manual ADM...

  • Page 11: Working Principle Of The Appliance

    Working principle of the appliance 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. General working The figure shows a cut-away view of the appliance. principle of the Cut-away view of the appliance appliance...

  • Page 12: The Appliance's Heating Cycle

    Working principle of the appliance In this appliance, the cold water enters the bottom of the tank through the cold water inlet (14). The heat of combustion is conducted to the water by the combustion chamber (8) and heat exchanger (11). The heated tap water leaves the tank through the hot water outlet (2).

  • Page 13: Safety Of The Installation

    Temperature protection Protection Description Frost thermostat When the frost thermostat sensor (46) measures a temperature of 20 °C or less, the heating cycle (2.3 "The appliance's heating cycle") will start. High-limit thermostat When the high-limit thermostat sensor (39) measures a temperature higher than 84 °C, the high-limit thermostat will open.
  • Page 14 2.5.4 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 15: Installation

    Installation Warning Installation work should 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 service. 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 16 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 environmental 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 17: Working Clearances

    3.3.4 Working clearances For access to the appliance, it is recommended that the following clearances are observed (see figure): • AA: around the appliance's control column and cleaning openings: 100 cm. • BB: all sides of the appliance: 50 cm. •...

  • Page 18: Technical Specifications

    Installation Technical The appliance is supplied without accessories. Check the dimensions (3.4.1 "Dimensions of the appliance"), gas data (3.4.3 "Gas data") specifications and other specifications (3.4.2 "General and electrical specifications") of any accessories you plan to use. 3.4.1 Dimensions of the appliance Plan and elevation of the appliance Legend See the table.
  • Page 19 Dimensions Size Description Unit ADM 40 ADM 50 ADM 60 ADM 80 ADM 90 ADM 115 ADM 135 Total height 1900 2100 1900 2100 2000 2085 2085 Height of top of appliance 1760 1960 1760 1960 1795 1870 1870 Appliance diameter Depth Width 1100...
  • Page 20 3.4.2 General and electrical specifications DESCRIPTION Unit ADM 40 ADM 50 ADM 60 ADM 80 ADM 90 ADM 115 ADM 135 Capacity litres Maximum operating pressure Empty weight Heating-up time ΔT = 45 minutes Number of anodes Number of bar burners/orifices Number of flue tubes/flue baffles Electrical power consumption Supply voltage...
  • Page 21 3.4.3 Gas data Description II Unit ADM 40 ADM 50 ADM 60 ADM 80 ADM 90 ADM 115 ADM 135 2H3+ Gas category 2H: General Orifice diameter 3.20 3.20 3.10 2.95 3.20 3.20 3.90 (1) = Blank plate 1, 2 or 3 (2) = Burner pressure regulator (3) = High/low regulator Gas category G20 - 20 mbar...

  • Page 22: Installation Diagram

    Installation Installation diagram 3.5.1 Installation This figure shows the installation diagram. This diagram is used in the sections in which the actual connection process is described. Installation diagram Legend UNVENTED Only applicable numbers are mentioned. 1. pressure reducing valve (mandatory) 3.

  • Page 23: Water Connections, Vented

    Water connections, Warning The installation should be carried out by an authorised installation engineer, Vented in compliance with general and local 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 between the cold water head tank (18) and the appliance, as required by regulations (1.3 "Regulations").

  • Page 24: Water Connections, Unvented

    Installation 3.6.5 Circulation pipe See (C) in the installation diagram (3.5 "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 of the circulation system.

  • Page 25: Gas Connection

    3.7.4 Drain valve IMD-0122 R1 3.7.5 Circulation pipe See (C) in the installation diagram (3.5 "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.

  • Page 26: Chimney Flue

    Installation Chimney flue Warning The installation should be carried out by an authorised installation engineer, in compliance with general and local regulations (1.3 "Regulations"). 3.9.1 Introduction The separately-supplied draught diverter must be used when connecting the appliance to the chimney flue. The standard flue gas thermostat and sensor that are supplied must be fitted in the draught diverter.

  • Page 27: Flue Gas Thermostat Assembly

    8. Screw the draught diverter tightly in place. 9. Fit: a 45° bend (7) onto the outlet of the draught diverter, followed by: a corrosion-resistant vertical chimney pipe (8) of at least 0.5 metres in length, the remaining flue components. Note Use flue gas discharge materials that comply with the regulations (1.3 "Regulations").

  • Page 28: Electrical Connection

    ( ). If this is the case, then an isolating transformer must be applied in the supply circuit . For more information or to order an isolating transformer, please contact A.O. Smith Water Products Company. The figure shows a view of the electrical connector block, and the table shows the appropriate connections.
  • Page 29 1. In preparation, first remove the protective cover from the control column: 2. Undo the 4 screws (A). 3. Remove the protective cover (B) from the electrical part. The connector block (C) is now visible. Note Please consult (14.2 "Electrical Diagrams ADM") the appropriate electrical diagram for details of the connections of the electrical components.

  • Page 30: Checking The Supply Pressure And Burner Pressure

    Installation 3.11 Checking the supply Note Before starting the appliance and/or checking the supply pressure and pressure and burner burner pressure, you must fill (5 "Filling") the appliance. pressure Caution Before starting up for the first time or after conversion, you must always check the supply pressure and burner pressure.
  • Page 31 Gas control for ADM 135 Legend Only applicable numbers are mentioned. 1. burner pressure regulator 2. burner pressure regulator cap 3. burner pressure regulator adjustment screw 6. supply pressure test nipple 7. gas control 8. manifold test nipple 9. high-low control IMD-0129 R1 3.11.1 Preparations...
  • Page 32 Installation 10. Use the pressure gauge to read the supply pressure at test nipple (6). Refer to the gas data table (3.4.3 "Gas data"). Note Consult the mains gas supply company if the supply pressure is not correct. 11. Use the pressure gauge to read the burner pressure at nipple (8). Refer to the gas data table (3.4.3 "Gas data").

  • Page 33: Conversion To A Different Gas Category

    Conversion to a different gas category Caution The conversion may only by carried out by an authorised installation 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.

  • Page 34: Conversion To Different Category Adm 40 Through 115

    Conversion to a different gas category Conversion to 1. Isolate the appliance from the power supply (10.3 "Isolating the appliance from the mains"). different category ADM 40 through 115 2. Shut off the gas supply. Caution The burner can be hot. 3.
  • Page 35 11. Check whether there is a burner pressure regulator (1) attached to the gas control, or simply a blank plate (5). Note If the supply pressure for a gas category is the same as the burner pressure (see the gas data table (3.4.3 "Gas data")) then the gas control must be fitted with a blank plate with cork gasket.

  • Page 36: Conversion To A Different Gas Category Adm 135

    Conversion to a different gas category Conversion to a different gas category ADM 135 4.2.1 Introduction This paragraph describes: • Conversion from LP gas to natural gas • Conversion from natural gas to LP gas Conversion of gas control Legend Only applicable numbers are mentioned.
  • Page 37 4.2.2 Conversion from LP gas to natural gas Installing and removing add-on components Legend Only applicable numbers are mentioned. 4. timers 5. bracket 6. 6-contact terminal strip 7 pull reliefs 8. 9-contact terminal strip 9. metric pull relief 10. high-low control lead IMD-0130 R1 Instruction manual ADM...
  • Page 38 Conversion to a different gas category 1. Carry out (4.1 "Conversion to different category ADM 40 through 115") steps 1 through 10 . 2. Detach the high-low control (9). 3. Fit the burner pressure regulator (1) including the sealing gasket from the conversion kit.

  • Page 39: Filling

    Filling Installation diagram Legend UNVENTED Only applicable numbers are mentioned. 1. pressure reducing valve (mandatory) 3. T&P valve 4. stop valve (recommended) 5. non-return valve (mandatory) 6. circulation pump (optional) 7. top to bottom circulation pump (optional) 9. drain valve 10.

  • Page 40: Filling Unvented Installations

    Filling Filling unvented To fill the appliance, proceed as follows: installations 1. Open the stop valve (11) in the hot water pipe and, if present, the stop valves (4) for the circulation pump (6). 2. Close the drain valve (9). 3.

  • Page 41: Draining

    Draining Installation diagram Legend UNVENTED Only applicable numbers are mentioned. 1. pressure reducing valve (mandatory) 3. T&P valve 4. stop valve (recommended) 5. non-return valve (mandatory) 6. circulation pump (optional) 7. top to bottom circulation pump (optional) 9. drain valve 10.

  • Page 42: Draining Unvented Installations

    Draining Draining unvented Some service activities require the appliance to be drained. The procedure is as follows: installations 1. Shut down the appliance by setting the ON/OFF switch on the control panel to position 0. 2. Isolate the water heater from the power supply by putting the isolator between the appliance and the mains power supply to position 0.

  • Page 43: The Control Panel

    The control panel Introduction Control thermostat Topics covered in this chapter, in sequence: Use the rotary knob of the control thermostat to set the desired water temperature between ± 40 °C and • Control panel ± 70 °C. The range is continuous and is labeled 1 •...

  • Page 44: Flue Gas Thermostat Reset Button

    The control panel Flue gas thermostat reset button A malfunction in the flue gas discharge, e.g. a blockage in the chimney, can lead to the flue gas thermostat locking out. This state is evident when the push button on the flue gas thermostat has been activated (refer to the figure).

  • Page 45: Status Of The Appliance

    Status of the appliance Introduction Error conditions Topics covered in this chapter: If the water heater goes into an "error" condition, you will be unable to draw hot water. The frost protection • Operating modes; will also be out of operation. These error conditions •...
  • Page 46 Status of the appliance Instruction manual ADM...

  • Page 47: Starting And Running

    Starting and running Introduction The heating cycle runs successively through the following states: Topics covered in this chapter: 1. HEAT DEMAND; • Starting the appliance; 2. WAIT; • The appliance's heating cycle. 3. PRE-GLOW; Starting the appliance 4. IGNITION; Start the appliance as follows: 5.
  • Page 48 Starting and running Instruction manual ADM...

  • Page 49: Shutting Down

    Shutting down 10.1 Introduction 10.5 Disposal Topics covered in this chapter: Old end-of-life appliances contain materials that need to be recycled. When disposing of old devices that • Shutting down the appliance for a brief period have reached the end of their service life, you should (OFF mode);...
  • Page 50 Shutting down Instruction manual ADM...

  • Page 51: Troubleshooting

    Troubleshooting 11.1 Introduction This chapter deals with the following problems with the appliance: • Gas smell. • Water leakage. • Explosive ignition. • Poor flame profile. • No hot water. • Insufficient hot water. 11.2 Error conditions If the water heater goes into an "error" condition, you will be unable to draw hot water.

  • Page 52: Troubleshooting Table For General Errors

    11.3 Troubleshooting table for general errors Warning Maintenance may only be performed by a qualified service and maintenance engineer. General faults and failures Symptom Cause Precautions Comment Gas smell Gas leak Warning Note Close the main gas valve immediately. Contact your installation engineer or local gas company immediately.

  • Page 53: Adm Troubleshooting Table - No Hot Water

    11.4 ADM Troubleshooting table - no hot water Warning Maintenance may only be performed by a qualified service and maintenance engineer. No hot water Symptom Cause Precautions Comment Green LED OFF and No supply voltage 1. Check if the isolator is ON. See the ADM electrical diagram (14 "Appendices") Red LED ON present...
  • Page 54 Symptom Cause Precautions Comment 1. No gas: If the error cannot be resolved or is persistent, contact your three unsuccessful installation engineer Check that the gas valve is open start attempts in a row Check whether the gas control is opening (clicking of the gas control) Check the leads of the gas control 2.

  • Page 55: Troubleshooting Table - 'Insufficient Hot Water

    11.5 Troubleshooting table - 'insufficient hot water' Warning Maintenance may only be performed by a qualified service and maintenance engineer. Insufficient hot water Symptom Cause Precautions Comment Insufficient hot water Water temperature Set the control thermostat (7.5 "Control thermostat") to a higher setting (T ) is too low value...
  • Page 56 Instruction manual ADM...

  • Page 57: Performing Maintenance

    Performing maintenance 12.1 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.

  • Page 58: Water-Side Maintenance

    Performing maintenance 12.3 Water-side maintenance 12.3.1 Introduction The following steps must be carried out on the water side: 1. Checking the anodes. 2. Descaling and cleaning the tank. 12.3.2 Checking the anodes Timely replacement of the anodes extends the service life of the appliance. The appliance's anodes must be replaced as soon as they are 60% or more used up (take this into consideration when determining the maintenance frequency).
  • Page 59 To simplify the task of descaling and cleaning the tank, the appliance is equipped with two cleaning openings. IMD-0235 R2 1. Remove the cover plate (1) on the outer jacket (see the figure). 2. Carefully remove the insulation layer (2) and set it to one side. This will be needed again later.

  • Page 60: Gas-Side Maintenance

    Performing maintenance 12.4 Gas-side maintenance 12.4.1 Introduction The following steps must be carried out on the gas side: 1. Clean the burner(s). 2. Clean the orifice(s). 3. Checking the flue baffles. 12.4.2 Clean the burner(s) 1. Detach the burner(s) 2. Remove all contamination present on the burner(s). 3.

  • Page 61: Warranty (Certificate)

    A.O. Smith shall offer to replace the defective water heater with an entirely new water heater of equivalent size and quality. The warranty period given on the replacement water heater shall be equal to the remaining warranty period of the original water heater that was supplied.

  • Page 62: Exclusions

    A.O. 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 63: Appendices

    Appendices 14.1 Introduction This section gives the electrical diagrams for: • Electrical diagram for ADM 40 to 135 natural gas and 40 to 115 LPG • Electrical diagram 135 - LP gas Instruction manual ADM...

  • Page 64: Electrical Diagrams Adm

    Appendices 14.2 Electrical Diagrams 14.2.1 Electrical diagram for ADM 40 to 135 natural gas and 40 to 115 LPG 230V AC 50Hz FUSE SUR- FACE L' L" N H N 1 10 11 0305471 R1 1 = brown, 2 = blue, 3 = yellow/green, 4 = black, 5 = white (flat cable) Instruction manual ADM...
  • Page 65 TERMINAL STRIP CONNECTIONS: CONTROLLER CONNECTIONS: Earth Neutral Neutral Earth Phase input of controller Phase input of controller L" Phase output to safety circuit and Phase input of flue gas thermostat thermostat circuit Phase output of flue gas thermostat Phase input of thermostat circuit COMPONENTS: Phase output to gas control Two-pole isolator switch...
  • Page 66 Appendices 14.2.2 Electrical diagram 135 - LP gas 230V AC 50Hz FUSE SUR- FACE L" 1 1 2 4 1 2 4 4 4 3 3 3 3 4 0304481 R1 1 = brown, 2 = blue, 3 = yellow/green, 4 = black, 5 = white (flat cable) Instruction manual ADM...
  • Page 67 TERMINAL STRIP CONNECTIONS: CONTROLLER CONNECTIONS: Earth Neutral Neutral Earth Phase input of controller Phase input of controller L" Phase output to safety circuit and Phase input of flue gas thermostat thermostat circuit Phase output of flue gas thermostat Phase input of thermostat circuit COMPONENTS: Phase output to gas control Two-pole isolator switch...
  • Page 68 Appendices Instruction manual ADM...
  • Page 69 Index ambient temperature 16 mains power 29 maintenance burner 60 finalising 60 burner pressure 30 gas-side 60 orifice 60 perform 57 claims 62 preparation 57 connect water-side 58 circulation piping 24, 25 cold water side 23, 24 electrical 28, 29 operating modes 45 gas 25 hot water side 24...
  • Page 70 Instruction manual ADM 0311 774 1.0 UK...

This manual is also suitable for:

Adm - 60Adm - 50Adm - 80Adm - 90Adm - 115Adm - 135

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