A.O. Smith ADM - 40 Troubleshooting guide

Innovation has a name.
Commercial Atmospheric
Water Heater
ADM - 40/50/60/80/90/115
ADMP
Installation, User and Service
Manual
0311812 2718-ChangesReserved.

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 ADMP 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 other than that stated in this manual and 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 any aspect 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) 0870 - 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 your installation's supplier/installation engineer.

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Instruction manual ADMP 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 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
1.6 Forms of notation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
1.7 Overview of this document - - - - - - - - - - - - - - - - - - - - - - - - 10
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 - - - - - - - - - - - - - - - - - - - - - - - 13
2.5 Safety of the installation - - - - - - - - - - - - - - - - - - - - - - - - - 14
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, Unvented - - - - - - - - - - - - - - - - - - - - - - 23
3.7 Gas connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 25
3.8 Electrical connection - - - - - - - - - - - - - - - - - - - - - - - - - - - 26
3.9 Chimney flue- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 27
3.10 Checking the supply pressure and burner pressure - - - - - - - - - - - - 30
4 Conversion to a different gas category - - - - - - - - - - - - 33
4.1 Conversion to a different gas category - - - - - - - - - - - - - - - - - - 34
5 Filling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 37
5.1 Filling unvented installations - - - - - - - - - - - - - - - - - - - - - - - 38
5.2 Filling vented installations - - - - - - - - - - - - - - - - - - - - - - - - 38
6 Draining - - - - - - - - - - - - - - - - - - - - - - - - - - - - 39
6.1 Draining unvented installations - - - - - - - - - - - - - - - - - - - - - - 40
6.2 Draining vented installations - - - - - - - - - - - - - - - - - - - - - - - 40
7 The control panel- - - - - - - - - - - - - - - - - - - - - - - - 41
7.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 41
7.2 Control panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 41
7.3 Control thermostat - - - - - - - - - - - - - - - - - - - - - - - - - - - - 41
7.4 On/off switch- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 41
7.5 Flue gas thermostat reset button - - - - - - - - - - - - - - - - - - - - - 41
8 Status of the appliance - - - - - - - - - - - - - - - - - - - - - 43
8.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
8.2 Operating modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
8.3 Error conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
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Table of contents
6Instruction manual ADMP
9 Starting and running - - - - - - - - - - - - - - - - - - - - - - 45
9.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
9.2 Starting the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
9.3 The appliance's heating cycle - - - - - - - - - - - - - - - - - - - - - - - 45
10 Shutting down - - - - - - - - - - - - - - - - - - - - - - - - - 47
10.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 47
10.2 Shutting the appliance down for a brief period ("OFF" mode) - - - - - - - - 47
10.3 Isolating the appliance from the mains - - - - - - - - - - - - - - - - - - - 47
10.4 Shutting the appliance down for a long period - - - - - - - - - - - - - - - 47
10.5 Disposal - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 47
11 Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - 49
11.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
11.2 Error conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
11.3 ADMP Troubleshooting table for general errors - - - - - - - - - - - - - - 50
11.4 ADMP Troubleshooting table - no hot water - - - - - - - - - - - - - - - - 51
11.5 ADMP Troubleshooting table - insufficient hot water - - - - - - - - - - - - 52
12 Performing maintenance - - - - - - - - - - - - - - - - - - - - 53
12.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53
12.2 Preparation for maintenance - - - - - - - - - - - - - - - - - - - - - - - 53
12.3 Water-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - 54
12.4 Gas-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - 56
12.5 Finalising maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - 56
13 Warranty (certificate) - - - - - - - - - - - - - - - - - - - - - - 57
13.1 General warranty - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 57
13.2 Tank warranty- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 57
13.3 Conditions for Installation and use - - - - - - - - - - - - - - - - - - - - - 57
13.4 Exclusions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 58
13.5 Scope of the warranty - - - - - - - - - - - - - - - - - - - - - - - - - - - 58
13.6 Claims - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 58
13.7 Obligations of A.O. Smith - - - - - - - - - - - - - - - - - - - - - - - - - 58
14 Appendices - - - - - - - - - - - - - - - - - - - - - - - - - - - 59
14.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 59
14.2 Electrical diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 60

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1 Introduction
1.1 About the appliance This manual describes how to install, service and use the ADMP appliance. The
ADMP appliance is a gas-fired open boiler without fan. ADMP appliances are
equipped with a flue gas backflow safeguard.
The ADMP is an appliance of type B11BS.
The information in this manual applies to types: ADMP 40, ADMP 50, ADMP 60,
ADMP 80, ADMP 90 and ADMP 115.
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 Gas Safety Installations and Use Regulations 1998 (as amended). By law,
all gas appliances must be installed by competent persons, in accordance with
the above regulations. Failure to install appliances correctly could lead to
prosecution. It is in your own interest, and that of safety, to ensure that this law
is complied with.
The installation of the boiler MUST be carried out in accordance with the
relevant requirements of the Gas Safety Regulations, Building Regulations, IEE
Regulations and the Water Supply (water fittings) Regulations.
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8Instruction manual ADM
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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 Standards
•BS 6891: Specification for installation of low-pressure gas pipework of up to
28 mm (R1) in domestic premises (2nd family gas). For larger installations,
see IGE/UP/2 below.
•BS 6798: Specification for installation of gas-fired boilers of rated input not
exceeding 70 kW net.
•BS 6644: Specification for installation of gas-fired hot water boilers of rated
inputs between 60 kW and 2 MW (2nd and 3rd family gases).
•BS 6700: Specification for design, installation, testing and maintenance of
services supplying water for domestic use within buildings and their
associated premises.
•BS EN 806-2: Specification for installations inside buildings conveying water
for human consumption. Part 2: Design.
•BS 5546: Specification for installation of hot water supplies for domestic
purposes, using gas-fired appliances of rated input not exceeding 70 kW.
•BS 5440: Installation and maintenance of flues and ventilation for gas
appliances of rated input not exceeding 70 kW net (1st, 2nd and 3rd family
gases). Part 1: Flues. Part 2: Ventilation.
Institute of Gas Engineers and Managers Publications
• IGE/UP/1 Soundness testing and purging of industrial and commercial gas
installations.
• IGE/UP/1A Soundness testing and direct purging of small low-pressure
industrial and commercial natural gas installations.
• GE/UP/2 Gas installation pipework, boosters and compressors on industrial
and commercial premises.
• IGE/UP/10 Installation of gas appliances in industrial and commercial
premises. Part 1: flued appliances.
CIBSE Publications:- "CIBSE Guide"
Section B4: Water Service Systems.
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
Symbol Target group
(End) user
Installation engineer
Service and maintenance engineer

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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.

Introduction
10 Instruction manual ADM
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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.