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Manual A.O. Smith TWI 45-190

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  • A.O. Smith TWI 45-190 - page 1

    3 5 - 1 3 0 4 5 - 1 9 0 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. SMITH CORPORA TION Installation User and Service Manual Installation User and Service Manual ...

  • A.O. Smith TWI 45-190 - page 2

    www .aosmithinternational.com your installer ...

  • A.O. Smith TWI 45-190 - page 3

    Instruction manual TWI 35-130 G/TWI 45-190 G 1 ...

  • A.O. Smith TWI 45-190 - page 4

    2 Instruction manual TWI 35-130 G/TWI 45-190 G ...

  • A.O. Smith TWI 45-190 - page 5

    Instruction manual TWI 35-130 G/TWI 45-190 G 3 W arning Carefully read this manual before starting up the device. Not reading this manual and not following the instructions in this manual may lead to personal injuries and damage to the device. Copyright © 2007 A.O. Smith Water Products Company All rights reserved. Nothing from this edition may be ...

  • A.O. Smith TWI 45-190 - page 6

    4 Instruction manual TWI 35-130 G/TWI 45-190 G ...

  • A.O. Smith TWI 45-190 - page 7

    Instruction manual TWI 35-130 G/TWI 45-190 G 5 T able of content 1 Introduction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7 1.1 About the device - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 7 1.2 What to do when you smell gas - - - - - - - - - - - - - - - - - ...

  • A.O. Smith TWI 45-190 - page 8

    6 Instruction manual TWI 35-130 G/TWI 45-190 G 1 1 W arranty (certi fi cate)- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51 1 1.1 W arranty general- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 51 1 1.2 Warranty tank- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ...

  • A.O. Smith TWI 45-190 - page 9

    Instruction manual TWI 35-130 G/TWI 45-190 G 7 1 1.1 About the device 1.2 What to do when you smell gas 1.3 Regulations Introduction This manual describes the installation, service and use of the TWI-device. The TWI-device is a condensating boiler with a fan in the air supply . The TWI can be installed both as a closed and as an open device. The de ...

  • A.O. Smith TWI 45-190 - page 10

    8 Instruction manual TWI 35-130 G/TWI 45-190 G Remark Supplements or later adjustments and/or additions to any regulations, requirements and guidelines are applicable at the moment of installing. The three target groups for this manual are: • (end) users; • installation engineers; • service and maintenance engineers. Symbols indicate on every ...

  • A.O. Smith TWI 45-190 - page 11

    Instruction manual TWI 35-130 G/TWI 45-190 G 9 Chapter T arget groups Description 2. Operation of the device This chapter describes the operation of the device. 3. Installation This chapter describes the installation activities to be carried out before de fi nitely starting up the device. 4. Conversion to another category Conversion to another cat ...

  • A.O. Smith TWI 45-190 - page 12

    10 Instruction manual TWI 35-130 G/TWI 45-190 G Introduction 1 Chapter T arget groups Description 1 1. W arranty (certi fi cate) This chapter contains the terms of warranty . 12. Annexes This chapter contains the electrical circuit diagram. ...

  • A.O. Smith TWI 45-190 - page 13

    Instruction manual TWI 35-130 G/TWI 45-190 G 1 1 2 Operation of the device 2.1 Introduction This chapter will cover in the given order: • General operation of the device; • Heating cycle of the device; • Security of the device; • Safety of the installation. 2.2 General operation The fi gure shows a cross section of the device. of the devic ...

  • A.O. Smith TWI 45-190 - page 14

    12 Instruction manual TWI 35-130 G/TWI 45-190 G Operation of the device 2 2.3 Heating cycle of the device 2.4 Security of the device In this device the cold water is supplied through the cold water inlet (16) at the bottom of the tank. The tap water heated by the combustion chamber (15) and heat exchanger (13) leaves the tank at the hot water outle ...

  • A.O. Smith TWI 45-190 - page 15

    Instruction manual TWI 35-130 G/TWI 45-190 G 13 2.4.2 Security of the water temperature The safety switch or ECO (Energy Cut-Off) switches of f the device when the water temperature exceeds 95 ºC. As soon as the temperature has suf fi ciently dropped, the ECO is reset automatically . Contact the installation engineer if the ECO repeatedly switche ...

  • A.O. Smith TWI 45-190 - page 16

    14 Instruction manual TWI 35-130 G/TWI 45-190 G 2 2.5 Safety of the installation Apart from the standard security of the device, the installation shall further be protected using an expansion vessel, an expansion valve, a pressure reducing valve, a non-return valve and a T&P valve. The use of an expansion vessel, expansion valve and/or pressure ...

  • A.O. Smith TWI 45-190 - page 17

    Instruction manual TWI 35-130 G/TWI 45-190 G 15 3.1 Introduction 3.2 Packaging 3.3 Ambient conditions W arning The installation shall be carried out by an authorised installation engineer in accordance with the generally and locally applicable regulations of gas, water , electricity companies and the fi re brigade. The device shall only be install ...

  • A.O. Smith TWI 45-190 - page 18

    16 Instruction manual TWI 35-130 G/TWI 45-190 G W ater composition Hardness (alkaline earth ions) > 1.00 mmol/l: - German hardness > 5.6° dH - French hardness > 10.0° fH - British hardness > 7.0° eH Conductivity > 125 muS/cm Acidity (pH-value) 7.0 < pH-value < 9.5 3.3.1 Air humidity and ambient temperature The installation a ...

  • A.O. Smith TWI 45-190 - page 19

    Instruction manual TWI 35-130 G/TWI 45-190 G 17 Remark When installing the device, make sure that the device cannot damage the immediate surroundings or lower fl oors in case of leakage of the tank and/or connections. If this is the case, install the device near a fl oor discharge or in a metal drip tray of the right size. A drip tray shall have ...

  • A.O. Smith TWI 45-190 - page 20

    18 Instruction manual TWI 35-130 G/TWI 45-190 G Dimensions (all sizes in mm, unless stated otherwise) Installation 3 3.4 T echnical speci fi cations Legends See the table. The tables below contain the technical data. 3.4.1 Dimensions of the device T op and bottom views of the device IMD-0529 R1 Dimension Description TWI 35-130 TWI 45-190 A Overall ...

  • A.O. Smith TWI 45-190 - page 21

    Instruction manual TWI 35-130 G/TWI 45-190 G 19 Description I2H Unit TWI 35-130 TWI 45-190 Gas category 2H: G20 – 20 mbar Nominal load (Upper value) kW 37,8 50,0 Nominal output kW 35,8 47,3 Supply pressure mbars 20 20 Gas consumption (*) m³/h 3,6 4,8 CO 2 V ol% 9,0 ± 0,5 9,3 ± 0,5 (*) Based on 1013,15 mbar and 15°C. Dimension Description TWI ...

  • A.O. Smith TWI 45-190 - page 22

    20 Instruction manual TWI 35-130 G/TWI 45-190 G 3 Installation 3.5 Connections diagram Legends Not mentioned numbers are not applicable. 1. pressure reducing valve (obligatory) 3. T&P valve (obligatory) 4. stop valve (recommended in pipe C and obligatory in pipe A) 5. non-return valve (obligatory) 6. circulation pump (optional) 9. drain valve 1 ...

  • A.O. Smith TWI 45-190 - page 23

    Instruction manual TWI 35-130 G/TWI 45-190 G 21 3.6 W ater connections unvented 3.7 W ater connections vented W arning The installation shall be carried out by a recognised installation engineer in accordance with the generally and locally applicable regulations (1.3 “Regulations”) . 3.6.1 Cold water side See (A) in the connections diagram (3.5 ...

  • A.O. Smith TWI 45-190 - page 24

    22 Instruction manual TWI 35-130 G/TWI 45-190 G 3 Installation 3.8 Gas connection 3.9 Air supply and fl ue gas discharge 1. Mount the T&P valve (3). 2. Option: mount a temperature meter (12) for checking the temperature of the tap water . 3 . Mount a stop valve (4) in the hot water distribution piping for service purposes. 4. If circulation pi ...

  • A.O. Smith TWI 45-190 - page 25

    Instruction manual TWI 35-130 G/TWI 45-190 G 23 Device types IMD-0531 R0 ...

  • A.O. Smith TWI 45-190 - page 26

    24 Instruction manual TWI 35-130 G/TWI 45-190 G Device Diameter Maximum length Maximum num- ber of 90° bends TWI 35-130 80/125 20 5 TWI 45-190 80/125 20 5 Explanation of device types Remark Make sure that the fl ue gas discharge is positioned in a discharge area in which discharge is allowed for the respective device type. 3.9.3 Concentric connec ...

  • A.O. Smith TWI 45-190 - page 27

    Instruction manual TWI 35-130 G/TWI 45-190 G 25 IMD-0532 R0 Device with concentric fl ue gas discharge material According to the table the maximum length is 20 metres and the allowed number of 90° bends is 5. Both requirements are met. Speci fi cations Caution A.O. Smith prescribes the use of a roof or wall fl ue terminal approved for the devic ...

  • A.O. Smith TWI 45-190 - page 28

    26 Instruction manual TWI 35-130 G/TWI 45-190 G Speci fi cation of concentric roof fl ue terminal C33 3.9.4 Parallel connections The table gives the maximum pipe length for parallel systems. The maximum pipe length depends on the selected diameter . W arning Mount fl ue gas discharge material with a fall of 5 mm per metre towards the device. Req ...

  • A.O. Smith TWI 45-190 - page 29

    Instruction manual TWI 35-130 G/TWI 45-190 G 27 Device with parallel fl ue gas discharge material IMD-0533 R0 Use the longest pipe to test for the maximum length. In this case this is the fl ue gas discharge pipe, that has a length of 25 metres. These 25 metres are composed of the pipe material parts 1, 2, 3, 4 and 5. The length of the transition ...

  • A.O. Smith TWI 45-190 - page 30

    28 Instruction manual TWI 35-130 G/TWI 45-190 G W arning The installation shall be carried out by a recognised installation engineer in accordance with the generally and locally applicable regulations (1.3 “Regulations”) . 3.10.1 Introduction This section will cover in the given order: • Preparation; • Connect the mains voltage; • Isolati ...

  • A.O. Smith TWI 45-190 - page 31

    Instruction manual TWI 35-130 G/TWI 45-190 G 29 Connector block Legends A. screws B. cover plate C. connector block D. strain relief For preparation remove the cover plate (B) from the electricity part by loosening the two screws (A). Remark Consult the electrical circuit diagram for connecting the electrical components. IMD-0534 R0 ...

  • A.O. Smith TWI 45-190 - page 32

    30 Instruction manual TWI 35-130 G/TWI 45-190 G 3.10.3 Connect the mains voltage The device is delivered without power cable and main switch. Remark In order to supply voltage to the device, connect the device to the mains voltage using a permanent electrical connection. Place a double pole main switch with a contact opening of min. 3 mm between th ...

  • A.O. Smith TWI 45-190 - page 33

    Instruction manual TWI 35-130 G/TWI 45-190 G 31 Legends Not mentioned numbers are not applicable. 1. screws 2. cover plate 3. sealing cap 4. CO 2 setting screw 5. setting hole Gas control 3.1 1.1 Checking procedure 1. Position the probe of the CO 2 -gauge into the fl ue gas discharge duct of the concentric venturi tube. 2. Open the gas supply and ...

  • A.O. Smith TWI 45-190 - page 34

    32 Instruction manual TWI 35-130 G/TWI 45-190 G 3.1 1.2 Adjust the CO 2 -value For preparation remove the cover plate (2) from the electricity part by loosening the two screws (1). 1. Remove the cap (3) from the CO 2 setting screw (4). 2. Insert a long screwdriver into the setting hole (5) along the air supply pipe. 3. Correct the CO2-value depende ...

  • A.O. Smith TWI 45-190 - page 35

    Instruction manual TWI 35-130 G/TWI 45-190 G 33 4 Conversion to another gas category Conversion to another gas category is not possible. ...

  • A.O. Smith TWI 45-190 - page 36

    34 Instruction manual TWI 35-130 G/TWI 45-190 G 4 Conversion to another gas category ...

  • A.O. Smith TWI 45-190 - page 37

    Instruction manual TWI 35-130 G/TWI 45-190 G 35 Legends Not mentioned numbers are not applicable. 1. pressure reducing valve (obligatory) 3. T&P valve (obligatory) 4. stop valve (recommended in pipe C and obligatory in pipe A) 5. non-return valve (obligatory) 6. circulation pump (optional) 9. drain valve 10. manual gas valve (obligatory) 1 1. s ...

  • A.O. Smith TWI 45-190 - page 38

    36 Instruction manual TWI 35-130 G/TWI 45-190 G 5 Fill 5.1.1 Fill unvented installations Proceed as follows for fi lling the device: 1. Open the stop valve (1 1) in the hot water pipe and (if present) the stop valves (4) of the circulation pump (6). 2. Close the drain valve (9). 3. Open the closest draw-off point (14). 4. Open the stop valve (4) o ...

  • A.O. Smith TWI 45-190 - page 39

    Instruction manual TWI 35-130 G/TWI 45-190 G 37 Legends Not mentioned numbers are not applicable. 1. pressure reducing valve (obligatory) 3. T&P valve (obligatory) 4. stop valve (recommended in pipe C and obligatory in pipe A) 5. non-return valve (obligatory) 6. circulation pump (optional) 9. drain valve 10. manual gas valve (obligatory) 1 1. s ...

  • A.O. Smith TWI 45-190 - page 40

    38 Instruction manual TWI 35-130 G/TWI 45-190 G 6 Drain 6.1 Drain unvented installations 6.2 Drain vented installations For some activities the device needs to be drained. Proceed as follows: 1. Electrically isolate the device by turning the main switch between the device and the electricity mains to the 0 position. 2. Shut off the gas supply (10). ...

  • A.O. Smith TWI 45-190 - page 41

    Instruction manual TWI 35-130 G/TWI 45-190 G 39 7.1 Introduction 7.2 Start up 7.3 Heating cycle of the device This chapter will cover in the given order: • Start up. • Heating cycle of the device. Start up the device by: 1. Filling the device (5 “Fill”) . 2. Opening the gas valve (3.5 “Connections diagram”) . 3. Switching on the voltage ...

  • A.O. Smith TWI 45-190 - page 42

    40 Instruction manual TWI 35-130 G/TWI 45-190 G 7 Start up The electronic control will then attempt to ignite the burner again three consecu- tive times. If this has not succeeded after three times, the electronic control will temporarily switch off. The control will automatically reset after an hour and the above-mentioned cycle will be repeated u ...

  • A.O. Smith TWI 45-190 - page 43

    Instruction manual TWI 35-130 G/TWI 45-190 G 41 Y ou can: • Shut down the device for a short time; • Electrically isolate the device; • Shut down the device for a long period. For shutting down the device for a short time, maximally turn the thermostat counterclockwise. This setting corresponds with a temperature of about 10 ºC, which protec ...

  • A.O. Smith TWI 45-190 - page 44

    42 Instruction manual TWI 35-130 G/TWI 45-190 G 8 Shut down ...

  • A.O. Smith TWI 45-190 - page 45

    Instruction manual TWI 35-130 G/TWI 45-190 G 43 A distinction is made between: • General errors General errors are not visible on the control. General errors are: - Gas smell - Insuf fi cient or no hot water - Water leakage - Explosive ignition. The manual includes a table with general errors (9.2 “T roubleshooting table for general errors”) ...

  • A.O. Smith TWI 45-190 - page 46

    9.2 T roubleshooting table for general errors W arning Maintenance shall only be carried out by a service and maintenance engineer . General errors Instruction manual - TWI 35-130 G/TWI 45-190 G 44 Symptom Cause Solution Remark Gas smell Gas leakage W arning Immediately close the mains gas supply valve. W arning Do not operate any switches. W arnin ...

  • A.O. Smith TWI 45-190 - page 47

    Instruction manual - TWI 35-130 G/TWI 45-190 G 45 Algemene storingen Symptom Cause Solution Remark Insuf fi cient or no hot water The device is off Start up the device (7 “Start up”) . Contact the installation engineer if the situation of insuf fi cient or no hot water persists. Hot water supply is fi nished Reduce the hot water consumption ...

  • A.O. Smith TWI 45-190 - page 48

    46 Instruction manual TWI 35-130 G/TWI 45-190 G Instruction manual - TWI 35-130 G/TWI 45-190 G 46 9.3 T roubleshooting table for errors visible on the control Errors visible on the control Light pulses Cause Solution Remark 1 (SC) Air pressure switch closed Defective air pressure switch Replace the air pressure switch. The error will automatically ...

  • A.O. Smith TWI 45-190 - page 49

    Instruction manual TWI 35-130 G/TWI 45-190 G 47 Instruction manual - TWI 35-130 G/TWI 45-190 G 47 Pannes s’af fi chant sur la commande Light pulses Cause Solution Remark 3 (SL3) Three ignition attempts without success No gas supply 1. Open the mains gas supply valve and/or the manual gas valve for the gas control. 2. Check the pre-pressure on th ...

  • A.O. Smith TWI 45-190 - page 50

    48 Instruction manual TWI 35-130 G/TWI 45-190 G Instruction manual - TWI 35-130 G/TWI 45-190 G 48 Light pulses Cause Solution Remark 4 (SL) Hardware error in gas control Error in the gas control circuit 1. Check if the gas control has been properly connected. 2. Check the cabling of the gas control. 3. Replace the gas control if necessary . Contact ...

  • A.O. Smith TWI 45-190 - page 51

    Instruction manual TWI 35-130 G/TWI 45-190 G 49 Service shall be carried out at least once a year both on the gas side and on the water side. The frequency of the maintenance depends, among other things, on the water quality , the average number of operating hours per day and the set water temperature. Remark Regular maintenance lengthens the life ...

  • A.O. Smith TWI 45-190 - page 52

    50 Instruction manual TWI 35-130 G/TWI 45-190 G 10.3.1 Descale Scaling depends on the water condition and the water demand. Besides, more scale deposit will be formed in the device at high temperatures. A temperature setting of 60 ºC is recommended to ensure low scale deposit. Descale using the appropriate agents. A descaling instruction is availa ...

  • A.O. Smith TWI 45-190 - page 53

    Instruction manual TWI 35-130 G/TWI 45-190 G 51 In order to register your warranty , please fi ll in the enclosed warranty card and return this to us. We will then send you a warranty certi fi cate. This certi fi cate will entitle the owner to warranty as described below for a boiler delivered by A.O. Smith W ater Products Company B.V . in V eld ...

  • A.O. Smith TWI 45-190 - page 54

    52 Instruction manual TWI 35-130 G/TWI 45-190 G W arranty (certi fi cate) 11 The warranty referred to in Articles 1 and 2 does not apply: a. if the boiler has been damaged by an external cause; b. in case of abuse, neglect (including freezing), modi fi cation, incorrect and/ or deviating use of the boiler and if attempts were made to repair leaks ...

  • A.O. Smith TWI 45-190 - page 55

    Instruction manual TWI 35-130 G/TWI 45-190 G 53 This annex contains: • The Electrical circuit diagram. • Legends 12.1 Introduction 12 Annex ...

  • A.O. Smith TWI 45-190 - page 56

    54 Instruction manual TWI 35-130 G/TWI 45-190 G Annex 12 IMD 0380 429 R0 1 = brown, 2 = blue, 3 = green, 4 = black, 5 = white, 6 = grey / beige 12.2 Electrical circuit diagram ...

  • A.O. Smith TWI 45-190 - page 57

    Instruction manual TWI 35-130 G/TWI 45-190 G 55 WIRING = brown = blue = green = black = white = red = orange = yellow = black/red = black/white CLAMPING STRIP CONNECTIONS: Earth N Zero L 1 Phase COMPONENTS: A Electronic control B Air pressure switch C Hot surface igniter D T emperature sensor / ECO E Thermostat board F Y ellow LED G Thermostat H Re ...

  • A.O. Smith TWI 45-190 - page 58

    56 Instruction manual TWI 35-130 G/TWI 45-190 G Annex 12 ...

  • A.O. Smith TWI 45-190 - page 59

    Instruction manual TWI 35-130 G/TWI 45-190 G 57 Index A air humidity 16 air pressure switch 13 ambient conditions 15 ambient temperature 16 B brand names 3 C concentric connections 24 condition gas valve open 39 heat demand 39 power on 39 connect air supply 22 circulation piping 21 cold water side 21 condensation drainage 21 diagram 20 electrical 1 ...

  • A.O. Smith TWI 45-190 - page 60

    58 Instruction manual TWI 35-130 G/TWI 45-190 G Index R reduction valve 14 regulations 7 S safety 14 scale 50 security 1 1 service 10,49 service engineer 8 set the service interval 66 shut down short period 41 longer period 41 isolate 41 speci fi cations 16 symbol installation engineer 8 service engineer 8 user 8 start up 39 T target groups 8 temp ...

  • A.O. Smith TWI 45-190 - page 61

    Instruction manual TWI 35-130 G/TWI 45-190 G 59 ...

  • A.O. Smith TWI 45-190 - page 62

    60 Instruction manual TWI 35-130 G/TWI 45-190 G 0308 489 R1.0 ...

Manufacturer A.O. Smith Category Water Heater

Documents that we receive from a manufacturer of a A.O. Smith TWI 45-190 can be divided into several groups. They are, among others:
- A.O. Smith technical drawings
- TWI 45-190 manuals
- A.O. Smith product data sheets
- information booklets
- or energy labels A.O. Smith TWI 45-190
All of them are important, but the most important information from the point of view of use of the device are in the user manual A.O. Smith TWI 45-190.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals A.O. Smith TWI 45-190, service manual, brief instructions and user manuals A.O. Smith TWI 45-190. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product A.O. Smith TWI 45-190.

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A complete manual for the device A.O. Smith TWI 45-190, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use A.O. Smith TWI 45-190 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of A.O. Smith TWI 45-190.

A complete A.O. Smith manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual A.O. Smith TWI 45-190 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the A.O. Smith TWI 45-190, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the A.O. Smith TWI 45-190, that we can find in the current document
3. Tips how to use the basic functions of the device A.O. Smith TWI 45-190 - which should help us in our first steps of using A.O. Smith TWI 45-190
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with A.O. Smith TWI 45-190
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of A.O. Smith TWI 45-190 in a specific country, if it was not possible to solve the problem on our own.

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