A.O. Smith BFC Cyclone 28 Troubleshooting guide

0311704 / R2.4

BFC Cyclone

High Efficient Condensing

Water Heater

BFC 28/30/50/60/80/100/120

Installation, User and Service Manual

4222 / EN

A.O. Smith Water Heaters

Unit B7-B8 Armstong Mall

Southwood Business Park

Farnborough Hampshire

GU14 ONR UK

T : 0870 267 6484

[email protected]

www.aosmith.co.uk

A.O. Smith Europe

De Run 5305

PO Box 70

5500 AB Veldhoven

The Netherlands

Data is subject to change.

Preface

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 in this

manual.

Trademarks

Brand names in this manual are registered trademarks of their respective owners.

Warranty

Refer to the appendix Warranty (see section 12.8) for the warranty provisions.

Liability

A.O. Smith accepts no liability for claims from third parties caused by:

unauthorized use

use other than stated in this manual

use other than in accordance with the General Conditions registered at the Chamber

of Commerce.

For more information, refer to the General Conditions. These are available on request, free

of charge.

We believe that this manual provides you with accurate and complete descriptions of all

relevant components. If you, nonetheless find errors or inaccuracies in this manual, please

inform A.O. Smith. This helps us to further improve our documentation.

Compliance

To safely produce domestic hot water, the design and construction of the BFC water

heaters is in accordance with:

the European Regulations 2016/426 on appliances burning gaseous fuels (GAR).

the European Standard for Gas–fired storage water heaters for the production of

domestic hot water (EN89).

The European ECO-Design Directive.

The European Energy Labeling Directive

Refer to the appendix Declaration of conformity.

•

0311704_BFC_28-120_III_ENEN_V2.4, 2022-10-17 3

Regulations

Gas Safety (installations and Use) Regulations 1998 (as

amended).

It is law that all gas appliances are 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 water heater MUST be in accordance with the relevant requirements

of the Gas Safety Regulations, Building Regulations, IEE Regulations and the Water Supply

(water fittings) Regulations. 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 and European Standards

BS 6891:

Installation of low pressure gas pipework of up to 35 mm (R1¼) in domestic

premises (2nd family gas) - Specification. Note: for lager installations see IGE/UP/2

below.

BS 6798:

Specification for installation and maintenance 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 70

kW (net) and 1.8 MW (net) (2nd and 3rd family gases).

BS 6700:

Design, installation, testing and maintenance of services supplying water for

domestic use within buildings and their cartilages - Specifications

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:

Flueing and ventilation for gas appliances of rated input not exceeding 70 kW net

(1st, 2nd and 3rd family gases).

Part 1: Specification for installation of gas appliances to chimneys and for

maintenance of chimneys.

Part 2: Specification for installation and maintenance of ventilation for gas

appliances.

Institute of Gas Engineers and Managers (IGEM) 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.

IGE/UP/2:

Gas installation pipework, boosters and compressors on industrial and commercial

premises.

IGE/UP/10:

Installation of flued gas appliances in industrial and commercial premises.

CIBSE Publications

Guide G:

Public Health Engineering

•

Contact information

If you have any comments or questions, please contact:

A.O. Smith Water Products Company

Adress: PO Box 70

5500 AB Veldhoven

The Netherlands

Telephone: 0870 - AOSMITH (free)

0870 - 267 64 84

General: +31 40 294 25 00

Fax: +31 40 294 25 39

E-mail: [email protected]

Website: www.aosmith.co.uk

In the event of problems with your gas, electricity or water supply connections, contact

your supplier.

0311704_BFC_28-120_III_ENEN_V2.4, 2022-10-17 5

About this manual

Scope

This manual gives information about safe and correct use of the water heater and how

installation, maintenance and service activities have to be done correctly. You must obey

the instructions in this manual.

Caution

Read this manual carefully before you start the water heater. It can cause personal injury

and damage to the water heater when you do not read the manual and/or do not obey

the instructions.

The purpose of this manual is to:

describe the working principles and layout of the water heater

explain the safety devices

highlight possible hazards

describe the use of the water heater

describe the installation, service and maintenance of the water heater

This manual has two parts:

An User part that describes the correct usage of the water heater.

An Installation, Maintenance and Service part, that describes the correct installation

and maintenance procedures.

Target group

The information in this manual applies to three target groups:

users

installation engineers

service and maintenance engineers

The User part is intended for the (end) users. The Installation, Maintenance and Service

part is intended for the installation engineers and the service and maintenance engineers.

Notation conventions

This manual uses the following text conventions:

Numbers between parentheses e.g. (1), refer to elements in a figure that are

described by the text.

Texts displayed on the user interface always are shown similar to the characters in

the display, for example WEEK PROGRAM, SETTINGS.

Buttons are always shown between brackets, for example: [ ], [ENTER], [RESET].

Cross-references to sections, tables, figures etc. are underlined and written as (see

section "..."). In the digital version, the cross-references function as hyperlinks that

can be used to navigate through the manual by clicking on them. Example: Safety

(see section 2).

•

0311704_BFC_28-120_III_ENEN_V2.4, 2022-10-17 7

This manual contains the following text styles/symbols for situations that may endanger

users/engineers, cause damage to equipment or need special attention:

Note

A note gives more information on a topic.

Caution

Obey the caution instructions to prevent damage of the water heater.

Warning

Obey the warning instructions to prevent danger of personal injury, and serious damage

to the water heater.

Document identification

Article number Language Version

0311704 EN 2.4

Table of Contents

Preface........................................................................................ 3

Trademarks....................................................................... 3

Warranty...........................................................................3

Liability.............................................................................3

Compliance....................................................................... 3

Regulations....................................................................... 4

Contact information............................................................ 5

About this manual....................................................................... 7

Scope............................................................................... 7

Target group..................................................................... 7

Notation conventions.......................................................... 7

Document identification.......................................................8

User part.................................................................. 13

1 Introduction.............................................................................. 15

2 Safety........................................................................................17

3 Interface................................................................................... 19

3.1 Operator interface............................................................ 19

3.2 Explanation of icons.......................................................... 19

3.3 Control switch.................................................................. 20

3.4 Buttons........................................................................... 20

3.5 PC connection.................................................................. 20

3.6 Status of the water heater................................................. 21

3.6.1 Operating modes.............................................................. 21

3.6.2 Error conditions................................................................22

3.6.3 Service conditions.............................................................23

3.6.4 Anode warning................................................................. 23

4 Use............................................................................................ 25

4.1 Turn on the water heater...................................................25

0311704_BFC_28-120_III_ENEN_V2.4, 2022-10-17 9

4.1.1 The appliance's heating cycle............................................. 25

4.2 Turn off the water heater...................................................27

4.2.1 Turn off for a short period..................................................27

4.2.2 Isolate from the mains...................................................... 28

4.2.3 Turn off for a long period...................................................28

4.3 Main menu...................................................................... 29

4.3.1 Notation conventions for menu-related instructions............... 29

4.3.2 Switching to ON mode.......................................................30

4.3.3 Setting the water temperature........................................... 30

4.3.4 Week program................................................................. 30

4.3.5 Starting and stopping the week program............................. 31

4.3.6 Changing the appliance's standard week program................. 31

4.3.7 Adding times to a week program........................................ 34

4.3.8 Deleting times from a week program...................................35

4.3.9 Extra period.....................................................................36

4.3.10 Settings.......................................................................... 38

Installation, Maintenance and Service part.............. 41

5 Introduction.............................................................................. 43

5.1 About the water heater..................................................... 43

5.2 The appliance's heating cycle............................................. 43

5.3 Working principle..............................................................43

5.4 Operating cycle................................................................ 45

6 Safety........................................................................................47

6.1 Safety instructions............................................................47

6.2 Instructions on the water heater.........................................48

6.3 Safety devices..................................................................49

6.3.1 Protection for the water heater...........................................49

6.3.2 Safety of the installation....................................................50

6.4 Environmental aspects...................................................... 50

6.4.1 Recycling.........................................................................50

6.4.2 Disposal.......................................................................... 51

7 Installation............................................................................... 53

7.1 Packaging........................................................................53

7.2 Conditions....................................................................... 53

7.2.1 Ambient conditions........................................................... 53

7.2.2 Maximum floor load.......................................................... 53

7.2.3 Water composition............................................................54

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