Instruction/ maintenance manual of the product GWV - 120 A.O. Smith
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V 120 150 200 W A T E R P R O D U C T S C O M P A N Y A DIVISION OF A. O. SMITH CORPORA TION W A T E R P R O D U C T S C O M P A N Y A DIVISION OF A. O.
www .aosmithinternational.com your installer.
Instruction manual GWV 3 gis Read this manual carefully Wa r ni n g 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 dama ge to the appliance.
4 Instruction manual GWV gis.
Instruction manual GWV 5 T able of content s 1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.1 About the appliance - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.2 What to do if you smell gas - - - - - - - - - - - - - - - - - - - - - - - - - 9 1.
Table of contents 6 Instruction manual GWV 8.2 Operating modes - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 53 8.3 Error conditions - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5 4 8.4 Service condition - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 54 8.
Instruction manual GWV 7 15 Performin g maintenance - - - - - - - - - - - - - - - - - - - - 89 15.1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 89 15.2 Preparation for maintenance - - - - - - - - - - - - - - - - - - - - - - - 89 15.
Table of contents 8 Instruction manual GWV.
Instruction manual GWV 9 gis 1 Introduction 1.1 About the appliance This manual describes how to install, service and us e the GWV appliance. This appliance is a closed, gas-fire d water heater with a fan in the air supply . The appliance is always supplied together with a storage tank.
Introduction 10 Instruction manual GWV 1 gis Furthermore, the installation must c omply with the ma nufacturer's instructions. Note Later amendments and/or additions to all regulations, require ments and guidelines published on or prio r to the moment of installing, will apply to the installation.
Instruction manual GWV 11 gis 1.7 Overview of this document The table provides an o verview of the contents of this document. Contents of this document Chapter T arget grou ps Description Worki ng principle of the appliance This chapter describes how the applian ce functions.
Introduction 12 Instruction manual GWV 1 gis.
Instruction manual GWV 13 gis 2 W orking principle of the appliance 2.1 Introductio n T opics covered in this chapter: • General working princi ple of the appliance ; • The appliance's heating cycl e ; • Protection for the appliance ; • Safety of the inst allation .
Working princi ple of the appliance 14 Instruction manual GWV 2 gis Cut-away view of the appliance IMD- 0500 R1 8 7 6 5 4 3 2 20 19 1 13 11 12 10 9 31 30 29 33 28 27 32 22 21 17 18 16 15 14 24 25 26 2.
Instruction manual GWV 15 gis In this appliance, the cold water enters the bottom of the st orage tank through the cold water inlet (24). The system pump (22) ensures that th e water flows into the appliance. Th e water is heated by the heat exchanger (20) in the combustion chamber (19).
Working princi ple of the appliance 16 Instruction manual GWV 2 gis 2.4 Protection for the applianc e 2.4.1 Introduction The electronic controller monitors the water temp erature and ensures safe combustion .
Instruction manual GWV 17 gis Pressure measurements are made at the air distribution plate (high pressure) and in a V enturi in the burners (low pressure). The table shows the trip point per appliance. Note The trip point of the pressure switch is not adjustable.
Working princi ple of the appliance 18 Instruction manual GWV 2 gis 2.5 Safety of the insta l- 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.
Instruction manual GWV 19 is 3 Inst allation Wa r ni n g Installation work should be carried o ut by an approved installation engineer in compliance with the general and local reg ulations imposed by the gas, water and power supply companies and the fire service.
Installation 20 Instruction manual GWV 3 is 3.3 Environment al conditions Caution An open appliance may not be used in rooms where chemical su bstances are stored or used due to the risk of ex plosion and corrosion of the appliance. Some propellants, bleaching agents and degreasing age nts etc.
Instruction manual GWV 21 is 3.3.3 Water composition The appliance is intended for heating drinkin g water . The drinking water must comply with the regulations governing drin king water for human consumption. The table gives an overview of the specifications.
Installation 22 Instruction manual GWV 3 is 3.4 T echnical spec ifica- tions Check the dimension s (3.4.1 "Dimensions of the appliance") , the gas data (3.4.3 "Gas data") and other specifications (3.4 .2 "General and electrical specifications") of the ap pliance.
Instruction manual GWV 23 is Dimensions (all measurements in mm unless otherwise indicated) 3.4.2 Ge neral and el ectrical specif ications Chimney data 1) St ated lengths and bends apply for both flue.
Installation 24 Instruction manual GWV 3 is Cont act rating s Operating pressure 3.4.3 Gas dat a Gas data Unit GWV 120 GWV 150 GWV 200 Electrical power consumption W 200 210 350 Supply voltage V AC 23.
Instruction manual GWV 25 is 3.5 Inst allation diagram This figure shows the installation diagram. This diagra m is used in the sections in which the actual connection process is descri bed.
Installation 26 Instruction manual GWV 3 is 3.6 Water connec tions, Ve n t e d Wa r ni n g The installation should be carrie d out by an authorised installation engineer , in compliance with general and loca l regulations (1.3 "Regulatio ns") .
Instruction manual GWV 27 is Distance X Distance X • 0 < X < 2 metres, rev setting 1 • 2 < X < 4 metres, rev setting 2 • 4 < X < 6 metres, rev setting 3 Y ou set the revs using the pump's adjuster unit. Proceed as follows: 1.
Installation 28 Instruction manual GWV 3 is 6. Put the cap back on the adjuster unit. 7. Insert the adjuster unit back in the pump. 8. Fit the cap back on the pump. 3.7 Water connec tions, Unvented Wa r ni n g The installation should be carrie d out by an authorised installation engineer , in compliance with general and loca l regulations (1.
Instruction manual GWV 29 is 3.8 Gas connect ion War n i n g The installation should be carried out by an authorised installation engineer , in compliance with general and local regulatio ns (1.
Installation 30 Instruction manual GWV 3 is C13: appliance with wall conduit C33: appliance with roof conduit Note Make sure that the chimney discharges into an are a where this is permitted for this category of appliance.
Instruction manual GWV 31 is 3.9.3 Para llel connection s The air supply duct an d flue gas outlet duct for the GWV 120, 150 and 200 exit the appliance separately . They must be connected (3.9.2 "Requirements for flue gas discharge materials") to the concentric wall condui t or roof conduit using a transition piece.
Installation 32 Instruction manual GWV 3 is Specifications for transition piece and concen tric wall flue terminal (C13) Specifications for transition piece and concentric roof condu it (C33) Subject Desc ription W all flue terminal set: • 1x wall flue terminal (incl.
Instruction manual GWV 33 is Specification of condensation outlet for uninsulate d lengths greater than 8 metres and no more than 20 metres 3.10 Electrical connection Wa r ni n g The installation should be carried out by an authorised installation engineer , in compliance with general and local regulatio ns (1.
Installation 34 Instruction manual GWV 3 is Connector block As part of the prep aration s, you should first remove the protective plate from the electrical section. 1. Loosen the 2 screws (A) of the electric al section, and remove the protective cap (B) from the electrical section.
Instruction manual GWV 35 is Electrical connector block 3.10.3 Connecting th e mains volt age The appliance is supplied with out a power cable and isolator . Note T o provide the appliance with vo ltage, the appliance must be permanently connected to the mains voltage.
Installation 36 Instruction manual GWV 3 is 4. If you do not need to make any more connectio ns: - Fit the protector pl ate onto the electrical connector block. 3.10.5 Connecting an exter nal on/off switch There is an option for connecting an external ON/OFF switch.
Instruction manual GWV 37 is Gas control 3.1 1.1 Prep aration T o check the supply pressure and burner pressure, proceed as fo llows: 1. Isolate (10.3 "Iso lating the appliance from the mains") the appliance fro m the power supply . 2. Undo the screws of the front cover .
Installation 38 Instruction manual GWV 3 is The display will now show INTERNAL CHECK for about 10 seconds and go to the main menu. 7. Activate the "ON mode" by going through the following step s: - Press the blue arrow once ( ) to position the cursor in front of ON and press .
Instruction manual GWV 39 is 3. Cover the opening of the adjusti ng screw and check the burner pressure against the value given in the gas table (3.4.3 "Gas data ") . 4. If the pressure is not set correctly , repeat the preceding steps until the correct pressure is attained.
Installation 40 Instruction manual GWV 3 is.
Instruction manual GWV 41 is 4 Conversion to a different gas category Caution The conversion may only by carried out by an authorised installation engineer .
Conversion to a differen t gas category 42 Instruction manual GWV 4 is.
Instruction manual GWV 43 gis 5 Filling 5.1 Inst allation diagram This figure shows the installation diagram. This diagra m is used in the sections in which the actual connection process is descri bed.
Filling 44 Instruction manual GWV 5 gis 5.2 Filling unvented inst allations T o fill the applianc e, proceed as follows: 1. Open the stop valve (1 1) in the hot wate r pipe and, if present, the sto p valves (4) for the circulation pump (6). 2. Close the drain valve (9).
Instruction manual GWV 45 gis 9. The appliance is now under water supply pr essure. There should be no water coming out of the expansion valve (15) or out of the P-valve (23). If there is, the cause might be: - The water su pply pressure is greater tha n the specified 8 bar .
Filling 46 Instruction manual GWV 5 gis.
Instruction manual GWV 47 gis 6 Draining 6.1 Inst allation diagram This figure shows the installation diagram. This diagra m is used in the sections in which the actual connection process is descri bed.
Draining 48 Instruction manual GWV 6 gis 6.2 Draining unvented inst allations Some service activities require the applia nce to be draine d. The procedure is as follows: 1. Activate the MENU with . 2. Position the cu rsor in front of OFF . 3. Confirm OFF with .
Instruction manual GWV 49 gis 5. Switch the appliance OFF (position 0) using t he ON/OFF switch on the control panel. 6. Isolate the water heater from the power supply by putting the isolator between the appliance and th e mains power supply to position 0.
Draining 50 Instruction manual GWV 6 gis 9. Close the stop valve (4) between the wa ter tank and the cold water inlet (A). 10. Open the drain valve (9).
Instruction manual GWV 51 gis 7 The control p anel 7.1 Introductio n T opics covered in this chapter: • Operation ; • Meaning of ico ns ; • Electronic controller ON/OFF switch ; • Navigation buttons ; • PC connection . 7.2 Operation The entire appliance is c ontrolled and monitored by the ThermoControl (the electronic control).
The control pane l 52 Instruction manual GWV 7 gis The ^ and È indicate that you can scroll up and/or down. Use the and buttons to scroll. The cursor » points to the option to be activated. In the display as shown in the figure, you can scroll th rough the main menu.
Instruction manual GWV 53 gis 8 S t atus of the appliance 8.1 Introductio n T opics covered in this chapter , in sequence: • Operating modes • Error conditions • Service con dition • Wa r n in g 8.2 Operating modes When running, the applian ce has four basic operating modes, namely: • OFF • ON • PROG • EXTRA 8.
Status of the app liance 54 Instruction manual GWV 8 gis In all modes, the temperature ma y at any moment drop below the desired temp erature. The appliance then enters a heating cycle. This heati ng cycle is identical (2.3 "The appliance's hea ting cycle") for all basic operating modes.
Instruction manual GWV 55 gis 9 S t arting and running 9.1 Introductio n T opics covered in this chapter , in sequence: • S tarting and running . • The appliance' s heating cycle . 9.2 St arting and runnin g S tart the appliance as follows: 1.
Starting and ru nning 56 Instruction manual GWV 9 gis Once the appliance st arts, it will run through the following steps: 1. The water temperature drops below the set temperature of (for example) 65 °C. The electronic controller detects a dema nd and start s the heating cycle.
Instruction manual GWV 57 gis 10. When the water is up to temperature, the heat demand drop s off and the post -purge st arts. Th is lasts about 25 seconds. - The , and icon s are remove d. - The icon is acti vated. - The message POST PURGE appears. 1 1.
Starting and ru nning 58 Instruction manual GWV 9 gis.
Instruction manual GWV 59 gis 10 Shutting down 10.1 Introductio n This chapter describes: • Shutting the installation down for a brief period ("OFF mode") ; • Isolating the applian ce from the mains ; • Shutting the appliance and sto rage tank down for a long period .
Shutting down 60 Instruction manual GWV 10 gis.
Instruction manual GWV 61 gis 1 1 Main menu 1 1.1 Introdu ction The MENU is reached by pre ssing the button of the electronic controller . The main menu comprises: • OFF Select this option if you wish to shut the appliance down (10 "Shutting down") for a brief period, but do not wi sh to dr ain it.
Main menu 62 Instruction manual GWV 11 gis • Con firm with .Af ter confirming, the appliance enters "ON mode". Note If the temperature setting is higher than the current water temperature, it is po ssible that the ap pliance will not immediately start heati ng.
Instruction manual GWV 63 gis The display shows the menu for the week program (see figure below). With the de fault setting, the program switches on and off every day at 00:00 and 23:59 respectively , the water temperature is 65ºC and the pump is switched on ( P ).
Main menu 64 Instruction manual GWV 11 gis 1 1.7.4 Week program: sett ing the program- controlled pump 1. If required, a pump can be controlled during the period. Use and to set PUMP ON The pump ensures a regular circulatio n of hot water in the ho t water pipes.
Instruction manual GWV 65 gis 1 1.9 Deleting times from a week program All switch-on/off times are shown sequentially in the display . Assume that the switch -on/off times for the appliance are programmed as in th e figure. T o delete a period, proceed as follows: The display shows the menu for the week program.
Main menu 66 Instruction manual GWV 11 gis 1 1.1 1 Programming an extra period 1. Call up the menu fo r entering an extra period via: 2. : EXTRA PERIOD Confirm with . The display show the settin gs for the extra period. 1 1.1 1.1 Setting the switch-on time 1.
Instruction manual GWV 67 gis 11 . 1 2 S e t t i n g s Using the SETTINGS option, you can adjust certain settings and read certain appliance data: • Adjustable settings - Languag e of the menu.
Main menu 68 Instruction manual GWV 11 gis Confirm the minute setting with The time has been set. Note The appliance takes no account of summer time. 1 1.12.3 D isplaying ap pliance specific ations Note This category is only re levant to the installation engineer and/or servi ce and maintenance e ngineer .
Instruction manual GWV 69 is 12 Service program 12.1 Introductio n The service program i s used by the installation engineer or servi ce and maintenance e ngineer for: • Setting the hysteresis ; •.
Service program 70 Instruction manual GWV 12 is 12.5 Displaying the appliance selection T o display the appli ance selection, use: •: SELECT APPLIANCE The appliance number ca n be found on the rating plate. The appliance selection has been correctly preset in the factory .
Instruction manual GWV 71 is The appliance switches from partial load to full load if the temperature difference between the water in the storage tank (T 3 ) and the set point (T set ) minus the negative hysteresis is greater than this stage difference.
Service program 72 Instruction manual GWV 12 is.
Instruction manual GWV 73 gis 13 T roubleshooting 13.1 Introductio n A di stinction is made between: • General errors General errors are not reported on the displa y . Ge neral errors are: - Gas smell - Display does not light up - Insufficient or no hot water .
is Instruction manual GWV 74 13.2 T roubleshooting t able for general errors Wa r ni n g Maintenance may only be perfo rmed by a qualified service and maintenance engi neer . General erro rs Features Cause Measures to take Comment Gas smell Gas leak Wa r n in g Close the main gas valve immediately .
is Instruction manual GWV 75 Features Cause Measures to take Comment Explosive ig nition Incorrect supply pressure and/or bu rner pressure Set the correct supply pressure and/or burner pressure. (3.1 1 "Checking the supply pressure and burner pressure") If ignition is not improved, consult your installation engineer .
is Instruction manual GWV 76 13.3 T roubleshooting t able for displayed errors Displayed errors Code + descrip tion Cause Measures to take Comment S01 (blocking error) Open circuit for temperature sen.
is Instruction manual GWV 77 Code + descrip tion Cause Measures to take Comment S1 1 (blocking error) Short-circuit for temperature sensor T 1 , inlet to heat exchanger Short circuit in sensor circuit.
is Instruction manual GWV 78 Code + descrip tion Cause Measures to take Comment F01 (blocking er ror) Defect in power supply circuit Live and neutral connected wrong way round Connect live and neutral correctly (3.
is Instruction manual GWV 79 Code + descrip tion Cause Measures to take Comment F03 (lock out error) The pressure switch fails to work correctly Damaged wiring/Open circuit 1.
is Instruction manual GWV 80 Code + descrip tion Cause Measures to take Comment F04 (lock out error) Three unsuccessful ignition attempts. No gas 1. Open the main gas valve and/ or the manual gas valve supplying the water heater 2. Check the supply pressure to the gas control 3.
is Instruction manual GWV 81 Code + descrip tion Cause Measures to take Comment F06 (blocking er ror) Short circuit between flame probe and earth Damaged cable in contact with metal surface. Check the wiring of the flame probe. Replace the wiring if necessary .
is Instruction manual GWV 82 Code + descrip tion Cause Measures to take Comment F10 (lock out error) Restriction on the number of ig nition attempts based on pressure switch state changes. Pressure switch not closing 1. Check the running speed of the fan 2.
is Instruction manual GWV 83 Code + descrip tion Cause Measures to take Comment C02 (lock out error ) Error message from the appliance controller . Incorrect reference voltage from the AD converter . 1. Reset electronic co ntroller . 2. Check that the frequency of the power supply is compliant (3.
is Instruction manual GWV 84 Note: (1) T emperature senso r T 2 is a '2 in 1' sensor; T 2 contains 2 NTCs for maximum thermostat a nd safety thermostat p rotection. (2) The dummy flue gas sensor consists of dummy flue gas sensor 1 and dummy flue gas sensor 2 .
is Instruction manual GWV 85 13.4 W arnings Wa r ni n g Maintenance may only be perfo rmed by a qualified service and maintenance engi neer . Note: (1) As a result of this warning, the appliance will .
Troubleshoo ting 86 Instruction manual GWV 13 gis.
Instruction manual GWV 87 is 14 Maintenance frequency 14.1 Introductio n A service should be carried out at lea st once a year , both on the water sid e and on the gas side. Maintenance fre quen cy depends, among other things, on the water quality , the average burning time per day an d the set water temperature.
Maintenance frequency 88 Instruction manual GWV 14 is.
Instruction manual GWV 89 s 15 Performing maintenance 15.1 Introductio n Cautio n Maintenance may only be performed by a qualified servi ce and maintenance engineer . At each service, the appliance unde rgoes maintenance on both the w ater side and the gas side.
Performing maintenance 90 Instruction manual GWV 15 s 6. Switch the electronic controller ON by setting the On/Off switch to position I . The display will now show INTERNAL CHECK for about 10 seconds and go to the main menu.
Instruction manual GWV 91 s 15.3 W ater-side mainte- nance 15.3.1 Introd uction The following steps must be carried out on the water side: 1. Checking the anodes 2. Descaling and cleaning the stora ge tank 15.3.2 Check ing the anodes T i mely replacement of the anodes extend s the service life of the appliance.
Performing maintenance 92 Instruction manual GWV 15 s 15.4 Gas-side mainte- nance 15.4.1 Introduction The following steps must be carried out on the gas side: 1. Clean the burner(s) 2. Clean the injector(s) 3. Cleaning the aluminium strips 15.4.2 Clean the burner(s) 1.
Instruction manual GWV 93 gis 16 W arranty (certificate) T o register your warranty , you shou ld complete and return the enclosed warranty card after which a wa rranty ce rtificate will be sent to you. This certificate gives the owner of a appl iance supplied by A.
Warranty (certificate) 94 Instruction manual GWV 16 gis 16.4 Exclusion s The warranty set out in articles 1 an d 2 will not apply in the event of: a. damage to the appliance caused by an external factor; b.
Instruction manual GWV 95 is 17 Appendices 17.1 Introductio n T his appendix contains: • Electrical diagram (17.2 "Electrical diagram") • Week program card.
Appendices 96 Instruction manual GWV 17 is 17.2 Electrical diagram Electrical diagram 1 = brown, 2 = blue, 3 = yellow/green, 4 = black, 5 = white, 6 = orange, 7 = red Q A X X X X X X X X X X X X X X X.
Instruction manual GWV 97 is TERMINAL BLOCK CONNECTIONS: Earth N Neutral L Phase input of controller L 1 Phase input of system pump L 2 Phase input of program-controlled pump COMPONENTS: A Controller .
Appendices 98 Instruction manual GWV 17 is.
Instruction manual GWV 99 17.3 Week program card Y ou can cut the week prog ram card out and keep it near the appliance. Example Period DA Y TIME T set Pump 1. ON ....°C ON / OFF OFF 2. ON ....°C ON / OFF OFF 3. ON ....°C ON / OFF OFF 4. ON ....°C ON / OFF OFF 5.
Instruction manual GWV 100.
Instruction manual GWV 101 Index A ambient temperature 20 appliance displaying history 69 displaying selection 70 C connect air supply 29 cold water side 26, 28 electrical 33 hot water side 28 connect.
0307 971 4.0 UK Index Instruction manual GWV.
An important point after buying a device A.O. Smith GWV - 120 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought A.O. Smith GWV - 120 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data A.O. Smith GWV - 120 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, A.O. Smith GWV - 120 you will learn all the available features of the product, as well as information on its operation. The information that you get A.O. Smith GWV - 120 will certainly help you make a decision on the purchase.
If you already are a holder of A.O. Smith GWV - 120, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime A.O. Smith GWV - 120.
However, one of the most important roles played by the user manual is to help in solving problems with A.O. Smith GWV - 120. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device A.O. Smith GWV - 120 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
