A.O. Smith BFM - 100 Supplement

Instruction manual BFM 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 © 2007 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 BFM 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 Maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
1.5 Forms of notation - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
1.6 Target groups - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 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 - - - - - - - - - - - - - - - - - - - - - - 13
2.4 Protection for the appliance - - - - - - - - - - - - - - - - - - - - - - - 13
2.5 Safety of the installation - - - - - - - - - - - - - - - - - - - - - - - - - 15
3 Installation - - - - - - - - - - - - - - - - - - - - - - - - - - - 17
3.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 17
3.2 Packaging - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 17
3.3 Ambient conditions- - - - - - - - - - - - - - - - - - - - - - - - - - - - 17
3.4 Technical specifications - - - - - - - - - - - - - - - - - - - - - - - - - 19
3.5 Installation diagram - - - - - - - - - - - - - - - - - - - - - - - - - - - 23
3.6 Water connections, Vented- - - - - - - - - - - - - - - - - - - - - - - - 24
3.7 Water connections, Unvented - - - - - - - - - - - - - - - - - - - - - - 25
3.8 Gas connection - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 26
3.9 Air supply and flue - - - - - - - - - - - - - - - - - - - - - - - - - - - - 27
3.10 Electrical connection - - - - - - - - - - - - - - - - - - - - - - - - - - - 34
3.11 Checking the supply pressure and burner pressure - - - - - - - - - - - - 36
4 Conversion to a different gas category - - - - - - - - - - - - 39
4.1 Conversion - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 39
4.2 Orifice replacement - - - - - - - - - - - - - - - - - - - - - - - - - - - 40
4.3 Replacement of burner pressure regulator or blank plate BFM30-50-80-100 41
5 Filling - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 43
5.1 Filling unvented installations - - - - - - - - - - - - - - - - - - - - - - - 44
5.2 Filling vented installations - - - - - - - - - - - - - - - - - - - - - - - - 44
6 Draining - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
6.1 Draining unvented installations - - - - - - - - - - - - - - - - - - - - - - 46
6.2 Draining vented installations - - - - - - - - - - - - - - - - - - - - - - - 47
7 The control panel- - - - - - - - - - - - - - - - - - - - - - - - 49
7.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
7.2 Control panel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
7.3 Explanation of icons - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
7.4 ON/OFF switch - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
7.5 Control thermostat - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49
7.6 Burner control reset button - - - - - - - - - - - - - - - - - - - - - - - - 50
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Table of contents
6Instruction manual BFM
8 Status of the appliance - - - - - - - - - - - - - - - - - - - - - 51
8.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51
8.2 Operating modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51
8.3 Error conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51
9 Starting and running - - - - - - - - - - - - - - - - - - - - - - 53
9.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53
9.2 Starting the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - 53
9.3 The appliance's heating cycle - - - - - - - - - - - - - - - - - - - - - - - 53
10 Shutting down - - - - - - - - - - - - - - - - - - - - - - - - - 55
10.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 55
10.2 Shutting down the appliance for a brief period (OFF mode)- - - - - - - - - 55
10.3 Isolating the appliance from the mains - - - - - - - - - - - - - - - - - - - 55
10.4 Shutting the appliance down for a long period - - - - - - - - - - - - - - - 55
11 Troubleshooting - - - - - - - - - - - - - - - - - - - - - - - - 57
11.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 57
11.2 Troubleshooting: general errors - - - - - - - - - - - - - - - - - - - - - - 58
11.3 Troubleshooting: insufficient hot water - - - - - - - - - - - - - - - - - - - 59
11.4 Troubleshooting: No hot water- - - - - - - - - - - - - - - - - - - - - - - 60
12 Performing maintenance - - - - - - - - - - - - - - - - - - - - 63
12.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 63
12.2 Preparation for maintenance - - - - - - - - - - - - - - - - - - - - - - - 63
12.3 Water-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - 64
12.4 Gas-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - 66
12.5 Finalising maintenance - - - - - - - - - - - - - - - - - - - - - - - - - - 66
13 Warranty (certificate) - - - - - - - - - - - - - - - - - - - - - - 67
13.1 General warranty - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 67
13.2 Tank warranty- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 67
13.3 Conditions for Installation and use - - - - - - - - - - - - - - - - - - - - - 67
13.4 Exclusions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 68
13.5 Scope of the warranty - - - - - - - - - - - - - - - - - - - - - - - - - - - 68
13.6 Claims - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 68
13.7 Obligations of A.O. Smith - - - - - - - - - - - - - - - - - - - - - - - - - 68
14 Electrical diagram - - - - - - - - - - - - - - - - - - - - - - - 69
14.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 69
14.2 BFM Electrical Diagram.- - - - - - - - - - - - - - - - - - - - - - - - - - 70

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1 Introduction
1.1 About the appliance This manual describes how to install, service and use the BFM appliance. The
BFM appliance is a gas-fired sealed boiler with a fan in the air supply. The
parallel or concentric chimney connections are appliance-dependent. Possible
installation types are C13 or C33. The information in this manual applies to the:
BFM 30, BFM 50, BFM 80, BFM 100 and BFM 120.
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.
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Introduction
8Instruction manual BFM
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Furthermore, the installation must comply with the manufacturer's instructions.
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 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.
1.5 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.
1.6 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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1.7 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 BFM
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