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Installation Installation Installation
User and User and User and
Service Manual Service Manual Service Manual
X XT TR RA A H HIIG GH H E EF FF FIIC CIIE EN NC CY Y
W W WA A AT T TE E ER R R P P PR R RO O OD D DU U UC C CT T TS S S
C C CO O OM M MP P PA A AN N NY Y Y
A A A D D DIV IV IVIS IS ISIO IO ION N N O O OF F F A A A. . . O O O. . . S S SM M MIT IT ITH H H C C CO O OR R RP P PO O OR R RAT AT ATIO IO ION N N
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www.aosmithinternational.com your installer
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gis 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 © 2008 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. Smi
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gis 4 Instruction manual BFC
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gis Table of contents 1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.1 About the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.2 What to do if you smell gas- - - - - - - - - - - - - - - - - - - - - - - - - 9 1.3 Regulations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.4 Target groups - - - - - - - - - - -
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Table of contents 9 Starting and running - - - - - - - - - - - - - - - - - - - - - - 53 9.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53 9.2 Starting and running- - - - - - - - - - - - - - - - - - - - - - - - - - - - 53 9.3 The appliance's heating cycle - - - - - - - - - - - - - - - - - - - - - - - 53 10 Shutting down - - - - - - - - - - - - - -
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16.3 Conditions for Installation and use - - - - - - - - - - - - - - - - - - - - 87 16.4 Exclusions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 88 16.5 Scope of the warranty - - - - - - - - - - - - - - - - - - - - - - - - - - 88 16.6 Claims - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 88 16.7 Obligations of A.O. Smith - - - - - - - -
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Table of contents 8 Instruction manual BFC
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gis 1 Introduction 1.1 About the appliance This manual describes how to install, service and use the BFC appliance. The BFC appliance is a condensing water heater with a fan in the air intake. The BFC can be installed as either an open or room-sealed appliance. A concentric chimney connector is fitted standard to the appliance. Alternatively, the appliance can be connected using a parallel system. The alternative installation types are B23, C13, C33, C43, C53 and C63. The information in this
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1 Introduction gis 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. The three target groups for this manual are: 1.4 Target groups • (end) users; • installation engineers; • service and maintenance engineers. Symbols on each page indicate the target groups for whom the information is intended. S
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gis 1.7 Overview of this The table provides an overview of the contents of this document. document Contents of this document Chapter Target groups Description Working principle of the This chapter describes how the appliance functions. appliance 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
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1 Introduction gis 12 Instruction manual BFC
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gis 2 Working principle of the appliance 2.1 Introduction Topics covered in this chapter: • General working principle of the appliance; • The appliance's heating cycle; • Protection for the appliance; • Safety of the installation. 2.2 General working The figure shows a cut-away view of the appliance. principle of the Cut-away view of the appliance appliance Legend 1 19 Only applicable numbers are 25 mentioned. 5 2 1. cover 4 2. hot water outlet 26 3. electrical connector block 27 4. electroni
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2 Working principle of the appliance gis The appliance is equipped with a gas/air premix burner (17). The air is drawn in through the fan (18). The gas is supplied via the gas control (16) on the intake side of the fan. The gas/air mixture is then blown into the burner. The modulated supply of gas and air ensures that the optimum gas/air mixture is always achieved. In this appliance the cold water enters the bottom of the tank via the cold water inlet (14). Once heated by the combustion cha
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gis •the Pressure switch; •the Flame probe. 2.4.2 Water temperature protection The electronic controller uses temperatures sensors T1 (7) and T2 (13) to monitor three temperatures that are important for safety. The table explains the functioning of the temperature sensors. Temperature protection Protection Description Against frost The frost protection cuts in. The water is heated to 20°C. (T1 < 5°C or T2 < 5°C) For maximum water temperature The high-limit safeguard serves to prevent overheati
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2 Working principle of the appliance gis 2.4.6 Flame probe To ensure that no gas can flow when there is no combustion, the water heater is fitted with a flame probe (21). The electronic controller uses this probe to detect the presence of a flame, by means of ionisation detection. The electronic controller closes the gas control the instant it detects that there is a gas flow but no flame. 2.5 Safety of the installation In addition to the appliance's standard built-in safety monitoring, the
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is 3 Installation Warning Installation work should be carried out by an approved installation engineer in compliance with the general and local regulations imposed by the gas, water and power supply companies and the fire service. The appliance may only be installed in a room that complies with the requirements stated in national and local ventilation regulations (1.3 "Regulations"). This chapter describes the installation activities to be carried out before you 3.1 Introduction actually st
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3 Installation is 3.3.1 Air humidity and ambient temperature The boiler room must be frost-free, or be protected against frost. The table shows the environmental conditions that must be adhered to for correct functioning of the electronics present in the appliance to be guaranteed. Air humidity and ambient temperature specifications Air humidity and ambient temperature Air humidity max. 93% RV at +25°C Ambient temperature Functional: 0 < T < 60°C 3.3.2 Maximum floor load Allow for the applianc
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BB is Working clearances IMD-0227 R2 The appliance is supplied without accessories. Check the 3.4 Technical dimensions (3.4.1 "Dimensions of the appliance"), gas data (3.4.3 "Gas data") specifications and other specifications (3.4.2 "General and electrical specifications") of any accessories you plan to use. Instruction manual BFC 19 AA AA
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3 Installation is 3.4.1 Dimensions of the appliance Plan and elevation of appliance (legend: see the table) F Hx C Hy 3 E 11º Ny 2 6 5 4 45º 18º 45º D G 2 3 5 N A K H S 6 7 1 4 P W R M IMD-0220 R4 20 Instruction manual BFC
