A.O. Smith ADM - 40 Troubleshooting guide

0311774
Innovation has a name.
Commercial Atmospheric
Water Heater
ADM - 40/50/60/80/90/115/135
ADM
Installation, User and Service
Manual
4615 - Changes Reserved.

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.
your installer

Instruction manual ADM 3
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Read this manual carefully Warning
Read this manual carefully before starting up the water heater. Failure to
read this manual and to follow the instructions in this manual may lead to
accidents, personal injury, and damage to the appliance.
Copyright © 2015 A.O. Smith Water Products Company
All rights reserved.
Nothing from this publication may be copied, reproduced and/or published by
means of printing, photocopying or by whatsoever means, without the prior
written approval of A.O. Smith Water Products Company.
A.O. Smith Water Products Company reserves the right to modify specifications
stated in this manual.
Trademarks 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, 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.
Refer further to the General Conditions. These are available on request, free of
charge.
Although considerable care has been taken to ensure a correct and suitably
comprehensive description of all relevant components, the manual may
nonetheless contain errors and inaccuracies.
Should you detect any errors or inaccuracies in the manual, we would be
grateful if you would inform us. This helps us to further improve our
documentation.
More information If you have any comments or queries concerning specific aspects related to the
appliance, then please do not hesitate to contact:
A.O. Smith Water Products Company
PO Box 70
5500 AB Veldhoven
Netherlands
Telephone: (free)0800 - AOSMITH
0870 - 267 64 84
General: [phone]
Fax: [phone]
E-mail: [e-mail]
Website: www.aosmithinternational.com
In the event of problems with connecting to the gas, electricity or water supply,
please contact the supplier/installation engineer of your installation.

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Instruction manual ADM 5
Table of contents
1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
1.1 About the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
1.2 What to do if you smell gas- - - - - - - - - - - - - - - - - - - - - - - - - 7
1.3 Regulations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7
1.4 Target groups - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
1.5 Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
1.6 Forms of notation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
1.7 Overview of this document - - - - - - - - - - - - - - - - - - - - - - - - - 9
2 Working principle of the appliance- - - - - - - - - - - - - - - 11
2.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 11
2.2 General working principle of the appliance - - - - - - - - - - - - - - - - 11
2.3 The appliance's heating cycle - - - - - - - - - - - - - - - - - - - - - - 12
2.4 Protection for the appliance - - - - - - - - - - - - - - - - - - - - - - - 12
2.5 Safety of the installation - - - - - - - - - - - - - - - - - - - - - - - - - 13
3 Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - 15
3.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15
3.2 Packaging - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 15
3.3 Ambient conditions- - - - - - - - - - - - - - - - - - - - - - - - - - - - 15
3.4 Technical specifications - - - - - - - - - - - - - - - - - - - - - - - - - 18
3.5 Installation diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - 22
3.6 Water connections, Vented- - - - - - - - - - - - - - - - - - - - - - - - 23
3.7 Water connections, Unvented - - - - - - - - - - - - - - - - - - - - - - 24
3.8 Gas connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 25
3.9 Chimney flue- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 26
3.10 Electrical connection - - - - - - - - - - - - - - - - - - - - - - - - - - - 28
3.11 Checking the supply pressure and burner pressure - - - - - - - - - - - - 30
4 Conversion to a different gas category - - - - - - - - - - - - 33
4.1 Conversion to different category ADM 40 through 115 - - - - - - - - - - 34
4.2 Conversion to a different gas category ADM 135 - - - - - - - - - - - - - 36
5 Filling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 39
5.1 Filling unvented installations - - - - - - - - - - - - - - - - - - - - - - - 40
5.2 Filling vented installations - - - - - - - - - - - - - - - - - - - - - - - - 40
6 Draining - - - - - - - - - - - - - - - - - - - - - - - - - - - - 41
6.1 Draining unvented installations - - - - - - - - - - - - - - - - - - - - - - 42
6.2 Draining vented installations - - - - - - - - - - - - - - - - - - - - - - - 42
7 The control panel- - - - - - - - - - - - - - - - - - - - - - - - 43
7.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
7.2 Control panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
7.3 Explanation of icons - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
7.4 ON/OFF switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
7.5 Control thermostat - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
7.6 Burner control reset button - - - - - - - - - - - - - - - - - - - - - - - - 43
7.7 Flue gas thermostat reset button - - - - - - - - - - - - - - - - - - - - - 44
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6Instruction manual ADM
8 Status of the appliance - - - - - - - - - - - - - - - - - - - - - 45
8.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
8.2 Operating modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
8.3 Error conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
9 Starting and running - - - - - - - - - - - - - - - - - - - - - - 47
9.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 47
9.2 Starting the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - 47
9.3 The appliance's heating cycle - - - - - - - - - - - - - - - - - - - - - - - 47
10 Shutting down - - - - - - - - - - - - - - - - - - - - - - - - - 49
10.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
10.2 Shutting down the appliance for a brief period (OFF mode)- - - - - - - - - 49
10.3 Isolating the appliance from the mains - - - - - - - - - - - - - - - - - - - 49
10.4 Shutting the appliance down for a long period - - - - - - - - - - - - - - - 49
10.5 Disposal - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
11 Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - 51
11.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51
11.2 Error conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51
11.3 Troubleshooting table for general errors - - - - - - - - - - - - - - - - - - 52
11.4 ADM Troubleshooting table - no hot water - - - - - - - - - - - - - - - - - 53
11.5 Troubleshooting table - 'insufficient hot water' - - - - - - - - - - - - - - - 55
12 Performing maintenance - - - - - - - - - - - - - - - - - - - - 57
12.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 57
12.2 Preparation for maintenance - - - - - - - - - - - - - - - - - - - - - - - 57
12.3 Water-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - 58
12.4 Gas-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - 60
12.5 Finalising maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - 60
13 Warranty (certificate) - - - - - - - - - - - - - - - - - - - - - - 61
13.1 General warranty - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 61
13.2 Tank warranty- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 61
13.3 Conditions for Installation and use - - - - - - - - - - - - - - - - - - - - - 61
13.4 Exclusions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 62
13.5 Scope of the warranty - - - - - - - - - - - - - - - - - - - - - - - - - - - 62
13.6 Claims - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 62
13.7 Obligations of A.O. Smith - - - - - - - - - - - - - - - - - - - - - - - - - 62
14 Appendices - - - - - - - - - - - - - - - - - - - - - - - - - - - 63
14.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 63
14.2 Electrical Diagrams ADM - - - - - - - - - - - - - - - - - - - - - - - - - 64

Instruction manual ADM 7
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1 Introduction
1.1 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 B11BS.
The information in this manual applies to types: ADM 40, ADM 50, ADM 60,
ADM 80, ADM 90, ADM 115 and ADM 135.
The appliance has been manufactured and equipped in accordance with the
European standard for gas-fired storage water heaters for the production of
domestic hot water (EN 89). The appliances are therefore compliant with the
European Directive for Gas Appliances, and and are entitled to bear the CE mark.
Warning
Read this manual carefully before starting up the water heater. Failure to
read the manual and to follow the printed instructions may lead to personal
injury and damage to the appliance.
1.2 What to do if you
smell gas
Warning
If there is a gas smell:
No naked flames! No smoking!
Avoid causing sparks! Do not use any electrical equipment or switch, i.e. no
telephones, plugs or bells!
Open windows and doors!
Shut off the mains gas supply valve!
Warn occupants and leave the building!
After leaving the building, alert the gas distribution company or your installation
engineer.
1.3 Regulations As the (end) user, installation engineer or service and maintenance engineer,
you must ensure that the entire installation complies, as a minimum, with the
official local:
• building regulations;
• energy supplier's directives for existing gas installations;
• directives and technical guidelines for natural gas installations;
• safety requirements for low-voltage installations;
• regulations governing the supply of drinking water;
• regulations governing ventilation in buildings;
• regulations governing the supply of air for combustion;
• regulations governing the discharge of products of combustion;
• requirements for installations that consume gas;
• regulations governing indoor waste water disposal;
• regulations imposed by fire brigade, power companies and municipality.
Furthermore, the installation must comply with the manufacturer's instructions.
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8Instruction manual ADM
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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.
1.4 Target groups The three target groups for this manual are:
• (end) users;
• installation engineers;
• service and maintenance engineers.
Symbols on each page indicate the target groups for whom the information is
intended. See the table.
Target group symbols
1.5 Maintenance 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.
Note
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 within three months following installation. Based on
this check, the best maintenance frequency can be determined.
Note
Regular maintenance extends the service life of the appliance.
Note
Both the end user and the service and maintenance engineer are
responsible for regular maintenance. They will need to establish clear
agreements on this.
Note
If the appliance is not regularly maintained, the warranty will become void.
1.6 Forms of notation The following notation is used in this manual:
Note
Important information.
Caution
Ignoring this information can lead to the appliance being damaged.
Warning
Failure to carefully read this information may lead to personal injury and
serious damage to the appliance.
Symbol Target group
(End) user
Installation engineer
Service and maintenance engineer

Instruction manual ADM 9
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1.7 Overview of this
document
The table provides an overview of the contents of this document.
Contents of this document
Chapter Target groups Description
Working principle of the
appliance
This chapter describes how the appliance functions.
Installation This chapter describes the installation activity to be
completed before you actually start up the appliance.
Filling This chapter describes how to fill the appliance.
Draining This chapter describes how to drain the appliance.
The control panel This chapter describes the general operation of the
appliance and explains how to use the control panel.
Status of the appliance This chapter describes the status (mode or condition) that
the appliance may have, and possible actions to take.
Starting and running This chapter describes how to start the appliance running.
The general heating cycle of the appliance is also
described.
Shutting down This chapter describes how to shut the appliance down for
a brief or long period of time.
Troubleshooting This chapter is mainly intended for the installation
engineer and the service and maintenance engineer. It
describes appliance errors. A table is included stating
potential symptoms, causes and solutions. End users
may also refer to this chapter for additional information
about the appliance.
Performing maintenance This chapter sets out the maintenance tasks to be carried
out during a service.
Warranty (certificate) This chapter states the warranty terms and conditions.

Introduction
10 Instruction manual ADM
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