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.

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: +31 40 294 25 00

Fax: +31 40 294 25 39

E-mail : info@aosmith.nl

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 .

4Instruction manual BFM

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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.

0063

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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