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V
120
150
200
Installation Installation
User User and and
Service Manual Service Manual
W WA AT TE ER R P PR RO OD DU UC CT TS S
C CO OM MP PA AN NY Y
A A D DIIV VIIS SIIO ON N O OF F A A.. O O.. S SM MIIT TH H C CO OR RP PO OR RA AT TIIO ON 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 © 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. Smi
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gis 4 Instruction manual GWV
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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 8.2 Operating modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53 8.3 Error conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 54 8.4 Service condition - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 54 8.5 Warning - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 54 9 Starting and running - - - -
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15 Performing maintenance - - - - - - - - - - - - - - - - - - - - 89 15.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 89 15.2 Preparation for maintenance - - - - - - - - - - - - - - - - - - - - - - - 89 15.3 Water-side maintenance - - - - - - - - - - - - - - - - - - - - - - - - - 91 15.4 Gas-side maintenance - - - - - - - - - - - - - - - - - - - -
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Table of contents 8 Instruction manual GWV
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gis 1 Introduction 1.1 About the appliance This manual describes how to install, service and use the GWV appliance. This appliance is a closed, gas-fired water heater with a fan in the air supply. The appliance is always supplied together with a storage tank. The possible categories for this appliance are C13, C33, and B23. The information in this manual applies to the: GWV 120, GWV 150 and GWV 200. The appliance has been manufactured and equipped in accordance with the European standard for
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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 GWV
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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 appliance Instruction manual GWV 13
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2 Working principle of the appliance gis Cut-away view of the appliance 14 Instruction manual GWV 1 2 3 4 5 6 8 7 32 9 10 31 30 33 29 28 27 11 12 13 26 22 21 25 24 23 20 19 18 17 16 15 14 IMD-0500 R1
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gis Legend 11. Drain valve 22. System pump: 1. Hot water outlet 12. Pressure switch 23. Temperature sensor T 3 2. Insulation layer 13. Air distributor plate 24. Cold water inlet 3. Electrical connector block 14. Flame probe 25. Inlet line 4. Aluminium strips 15. Hot surface igniter/flame 26. Return line probe connector 5. ThermoControl (electronic 27. Return valve controller) 16. Injectors 28. Supply valve 6. Flue gas discharge 17. Glow plug 29. Flow-through switch: 7. Jacket cover plate 18. Bar
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2 Working principle of the appliance gis 2.4 Protection for the appliance 2.4.1 Introduction The electronic controller monitors the water temperature and ensures safe combustion. This is achieved by: • the Water temperature protection • the Gas control • the Fan • the Pressure switch • the Flame probe • the Flow-through switch 2.4.2 Water temperature protection The electronic controller monitors the water temperature with temperature sensors T , T and T as shown in the table. 1 2 3 Temperatur
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gis Pressure measurements are made at the air distribution plate (high pressure) and in a Venturi in the burners (low pressure). The table shows the trip point per appliance. Note The trip point of the pressure switch is not adjustable. Pressure switch trip points Appliance Closing pressure Opening pressure differential differential GWV 120 > 80 Pa < 66 Pa GWV 150 > 89 Pa < 75 Pa GWV 200 > 107 Pa < 92 Pa 2.4.6 Flame probe To ensure that no gas can flow when there is no combustion, the water
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2 Working principle of the appliance gis 2.5 Safety of the instal- lation As well as the standard safeties in the appliance (2.4 "Protection for the appliance"), it must also be protected by an inlet combination and a pressure- reducing valve. A P-valve is also used. 2.5.1 Unvented installation With unvented installation, an expansion valve and expansion vessel prevent excessive pressure in appliance. This prevents damage being caused to the enamelled coating (in the appliance) or to the hea
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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 Environmental Caution An open appliance may not be used in rooms where chemical substances conditions are stored or used due to the risk of explosion and corrosion of the appliance. Some propellants, bleaching agents and degreasing agents etc. disperse vapours that are explosive and/or cause accelerated corrosion. If the appliance is used in a room in which such substances are present, the warranty will be void. The appliance is suitable for both open and closed combus
