A.O. Smith TWI 45-190 Installation Manual
Contents
1. IMD 0380 429 RO Instruction manual TWI 35 130 G TWI 45 190 G white 6 grey beige black 5 12 12 2 Electrical circuit diagram green 4 e blue 3 o 2 oN i i i i 1 1 Lol lolo ES N ia i Dog 1 i Pod D i i i H EE alba xa See 1 1 i i z i i a reet T J i N N O i 121 yO l i I r 1 N i b Lee I X X X X X i j 1 19 5 i i i 1 i i I i 1 k O elzl hd s e tal amp en Te o L we LY NI 2 09 DVA0EZ 1 brown 2 54 EX 12 3 Legends WIRING D brown 2 blue 3 green 4 black 5 white 6 red 7 orange 8 yellow 9 black red 10 black white CLAMPING STRIP CONNECTIONS Earth N Zero L Phase COMPONENTS A Electronic control B Air pressure switch C Hot surface igniter D Temperature sensor ECO E Thermostat board F Yellow LED G Thermostat RedLED J Green LED K Gas control L Transformer 120 VAC 24 VAC M Fan isolating relay Z Transformer 230 VAC 120 VAC P Fuse O Double pole main switch R Fan Instruction manual TWI 35 130 G TWI 45 190 G 55 56 12 Annex EX Instruction manual TWI 35 130 G TWI 45 190 G AEX2. 36 Drain oonan hhh nn hhh hhh hhh nn hhh nn eee 37 Drain unvented installations 38 Drain vented installations 38 Start up e 39 Introduction 39 Start up eee ee ee ee ee 39 Heating cycle of the device 39 Shut down 2 222 hhh eee eee ee eee 41 Introduction C K K KKK KKK KKK KKK KKK KKK eee 41 Shut down the device for a short time 41 Electrically isolate the device L 41 Shut down the device for a long period 41 Errors lt KKK KKK hhh hhh hhh hh 43 Introduction 43 Troubleshooting table for general errors 44 Troubleshooting table for errors on the control 46 Maintenance 49 Introduction eee eee En KKK KKK eee 49 Prepare maintenance 49 VVater side maintenance 50 Gas side maintenance 50 Complete maintenance 50 Instruction manual TWI 3
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4. 8 Maintenance eee eee eee eee eee eee 8 Notation system 9 Overview of this document 9 Operation of the device 11 Introduction 11 General operation of the device 11 Heating cycle of the device 12 Security of the device 12 Safety of the installation 14 Installation 15 Introduction 15 Packaging 15 Ambient conditions 15 Technical specifications 18 Connections diagram 20 Water connections unvented 21 Water connections vented 22 Gas 22 Air supply and flue gas discharge 22 Electrical connection 28 Check and adjust the CO value 30 Conversion to another gas category 34 MU 12 2 35 Fill the device
5. 26 Instruction manual TWI 35 130 G TWI 45 190 G Device with parallel Hue gas discharge material IMD 0533 RO Use the longest pipe to test for the maximum length In this case this is the flue 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 piece need not be taken into account The total number of used bends in the flue gas discharge and air supply is eight The bend in the transition piece need not be taken into account According to the table 4 6 metres shall be calculated for each bend This makes the total pipe length 4 6 x 8 25 36 8 25 61 8 m This is shorter than the length of 100 metres given in the table Therefore the installation meets the requirements Instruction manual TWI 35 130 G TWI 45 190 G 27 3 3 10 Electrical connection 3 10 1 3 10 2 28 Installation t E pe W Warning The installation shall be carried out by a recognised installation engineer in accordance with the generally and locally applicable regulations 1 3 Regulations Introduction This section will cover in the given order Preparation Connect the mains voltage solating transformer Remark J The optional components have not been included in the electrical power consumption indicated in the table 3 4 2 General and electrical data Preparation Caution The device is phase sensitive It i
6. EX 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 amp P valve The use of an expansion vessel expansion valve and or pressure reducing valve is dependent on the type of installation unvented or vented Unvented installation With an unvented installation an expansion valve and an expansion vessel avoid a too high pressure in the tank This prevents damage to the tank A non return valve avoids a too high pressure on the water piping This valve also avoids water from the tank flowing into the water piping The pressure reducing valve protects the installation against a too high water piping pressure gt 8 bars The parts are mounted into the cold water system 3 6 1 Cold water side Vented installation With a vented installation the open water tank absorbs the overpressure The height of the water tank determines the maximum operating pressure in the tank The maximum operating pressure is 8 bars The installation shall also be equipped with an expansion valve of the hot water piping that flows out into the water tank In the ideal situation this should flow out in a separate discharge channel otherwise in the open water tank The device shall also have a stop valve on the water side 3 6 2 Hot water side T amp P valve AT amp P valve is only obligatory with unvented i
7. 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 19 flue gas discharge 22 gas 25 hot water side 21 isolating transformer 30 contents of document 9 conversion to another gas category 33 CO value 30 D descale 50 device general operation 11 heating cycle 12 security 12 types 9 17 dimensions 18 drain 37 E electrical circuit diagram 54 electrical connection 28 electrical connector block 29 error 43 F fan 13 fill 43 floor loading 16 Instruction manual TWI 35 130 G TWI 45 190 G G gas control 13 gas smell 7 general data 3 general operation 11 H heat demand 39 heating cycle 39 in operation 39 index 57 installation engineer 8 ionisation detection 13 isolating transformer 30 L liability 3 M main switch 30 mains voltage 30 maintenance burner 50 carry out 49 complete 50 condensation drainage 50 gas side 50 heat exchanger 50 prepare 49 scale 50 water side 50 maximum floor loading 16 N notation system 9 P packaging 15 parallel connections 26 power cable 30 protected cold supply setup 14 protection against freezing 41 purge afterwards 53 57 Index R reduction valve 14 regulations 7 s safety 14 s
8. Installation User and Service Manual TANS S Il NA IER min WATER PRODUCTS COMPANY C A DIVISION OF A O SMITH EORPORATION LL www aosmithinternational com your installer Instruction manual TWI 35 130 G TWI 45 190 G Instruction manual TWI 35 130 G TWI 45 190 G rin E DS Carefully read this manual Trade marks Liability Additional information Instruction manual TWI 35 130 G TWI 45 190 G W Warning 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 O 2007 A O Smith Water Products Company All rights reserved Nothing from this edition may be copied reproduced and or made public by means of press photocopying or in any other way without prior permission in writing from A O Smith Water Products Company A O Smith Water Products Company reserves the right to change the specifications as mentioned in this manual All brand names mentioned in this manual are registered trademarks of the respective suppliers A O Smith Water Products Company does not accept any liability for claims of third parties as a result of incompetent use other than mentioned in this manual and in conformity with the General Terms and Conditions as filed with the Chamber of Commerce For further information see the General Terms and Conditions These are obtainable from us free o
9. 3 7 4 3 9 1 3 9 2 Installation t E pe 1 Mount the T amp P valve 3 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 piping is required proceed by mounting the circulation piping 3 6 3 Circulation piping Circulation piping See C in the connections diagram 3 5 Connections diagram If you want to have hot water available immediately you can install a circulation pump at the draw off points This is more comfortable and avoids spillage of water il Mount a circulation pump 6 vvit a capacity that corresponds vvith the size and the resistance of the circulation system 2 Mount a non return valve 5 follovving the circulation pump to guarantee the circulation direction 3 Mount two stop valves 4 for service purposes 4 Connect the circulation piping to the cold water supply pipe Condensation drainage 1 Attach underneath the fall a drainage pipe to the siphon 13 for condensation drainage and connect this to the water discharge pipe W Attention All connections downstream the siphon shall be condensation resistant W Warning The installation shall be carried out by a recognised installation engineer in accordance with the generally and locally applicable regulations 1 3 Regulations Caution Make sure that the diameter and the length of the gas
10. 4 zm 9 IMD 0536 R1 nstruction manual TVVI 35 130 G TVVI 45 190 G Vo gt 3 6 3 7 Water connections unvented Water connections vented 3 6 1 3 6 2 3 6 3 3 6 4 3 7 1 3 7 2 W Warning The installation shall be carried out by a recognised installation engineer in accordance with the generally and locally applicable regulations 1 3 Regulations Cold water side See A in the connections diagram 3 5 Connections diagram 1 Position an approved stop valve 4 on the cold water side in accordance with the applicable regulations 1 3 Regulations 2 The maximum operating pressure of the device is 8 bars As the water piping pressure can incidentally exceed 8 bars mount an approved pressure reducing valve 1 3 Mount a non return valve 5 and an expansion vessel 16 4 Mount an expansion valve 15 and connect the overflow side to an open water drainage pipe Hot water side See B in the connections diagram 3 5 Connections diagram Note g Insulation of the long hot water pipes prevents unnecessary loss of energy 1 Option mount a temperature meter 12 for checking the temperature of the tap water 2 Mount the T amp P valve 3 3 Mount a stop valve 11 in the hot water distribution piping for service purposes Circulation piping See C in the connections diagram 3 5 Connections diagram If you want to have hot water
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12. available immediately you can install a circulation pump at the draw off points This is more comfortable and avoids spillage of water 1 Mount a circulation pump 6 wit a capacity that corresponds with the size and the resistance of the circulation system 2 Mount a non return valve 5 following the circulation pump to guarantee the circulation direction 3 Mount two stop valves 4 for service purposes 4 Connect the circulation piping to the cold water supply pipe Condensation drainage 1 Attach underneath the fall a drainage pipe to the siphon 13 for condensation drainage and connect this to the water discharge pipe yY Attention All connections downstream the siphon shall be condensation resistant W Warning The installation shall be carried out by a recognised installation engineer in accordance with the generally and locally applicable regulations 1 3 Regulations Cold water side See A in the connections diagram 3 5 Connections diagram 1 Mount on the cold water side an approved stop valve 4 between the water tank 18 and the device in accordance with the applicable regulations 1 3 Regulations Hot water side See B in the connections diagram 3 5 Connections diagram Note g Insulation of the long hot water pipes prevents unnecessary loss of energy Instruction manual TWI 35 130 G TWI 45 190 G 21 3 8 3 9 22 Gas connection Air supply and flue gas discharge 3 7 3
13. 5 130 G TWI 45 190 G 5 11 12 11 1 11 2 11 3 11 4 11 5 11 6 11 7 12 1 12 2 12 3 Table of content Warranty certificate 51 Warranty general 51 Warranty tank 51 Conditions of installation and use 51 Exclusions 52 Extent of the warranty 52 s nc 52 Obligations of A O Smith 52 Annex 53 Introduction zz LL LL LL Hua 53 Electrical circuit diagram 54 Legends electrical circuit diagram 55 Index 57 Instruction manual TWI 35 130 G TWI 45 190 G AEX 1 1 1 About the device 0063 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 device typically has a concentric chimney connection The device can also be connected as a parallel system The possible device types are B23 C13 C33 C43 C53 and C63 The information in this manual i
14. 57 IML D O L S IML fenuew uolloniisul 19ung u ue o Z F 01 Jeuunq y uea Jaung pajeuluejuon KA enje O23 pe ouduui jou seu uous au 11 jeeurBue uoneljie sui v 1261002 enjeA o2 eui 1sn pe pue yoeyD LL E enjeA Q2 1081109 94 195 yes poeuoou uoniuBi eAisojdx3 BUI JO Je4njyoejnueui y Jo pue Jellddns y NSuon yue y jo eBexee Aq eau edid 99I 9p JOJEM Joujoue eui pu j wo oBexee ayes AleSS899U JI SIU 810 594 peDueuosip si ejesuepuoo JI uepuoo Jo oBexee1 uono u u q JOU sey 26eyeoj y Ji jeeuiBue uonejejsur v 3263002 uonoeuuoo p pe uu y uay IL u09 Jayem bues a eyeaj 1o1eA Ul p jje su ueeq sey eoi ep l y BuiujeA uedo oN Burusem AN sayoyms Aue jou oq A BuiujeA A ueduioo 586 eoo y 10 JeeuiBue UONEJ E SUI v 12e3uo9 ane Ajddns 566 surew y asojo A eyerpeuuuu Burusem oDeyeo seo S4J0448 4eeuiBue eoueuejureui pue BIINIBS e Aq no paleo eq Ajuo jeus eoueuesjurelw BuiuueA A XK D N S10119 10 ajqe BuNooyssiqnoaL Z 6 Sv 061 957 IML D O L SE IML fenuew uogonujsu dn yeay o peusiul eur eulos BU pue uonduunsuoo 19 em 104
15. Electronic control Thermostat board Inspection window Operation of the device 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 The figure shows a cross section of the device Cross section of the device IMD 0527 RO Instruction manual TWI 35 130 G TWI 45 190 G 11 2 3 2 4 12 Heating cycle of the device Security of the device 2 4 1 Operation of the device E 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 outlet 12 If the device is maximally filled with water there is a constant water piping pressure When tapping hot water from the device cold water is immediately added again The device has been provided with an e premix burner 4 with 1 1 gas air ratio control The fan 10 sucks in the air that is required for the combustion The gas is supplied through the gas control 7 and the venturi on the suction side of the fan The 1 1 gas air coupling always ensures an optimum gas air ratio Because of the special construction of the heat exchanger 13 the flue gasses are first led up through the combustion chamber and then down through the heat exchanger along the water This gradually coo
16. NTED Legends Not mentioned numbers are not applicable 1 pressure reducing valve obligatory 3 T amp 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 11 service valve 12 temperature meter optional 13 condensation drainage 14 draw off points 15 expansion valve obligatory 16 expansion vessel obligatory 17 three way aeration valve recommended 18 water tank VENTED 19 float valve v A cold water supply 15 B hot vvater discharge Fa C circulation piping ja D gassupply ne E water overflow d H overflow pipe 4 IMD 0537 R1 4564 Instruction manual TWI 35 130 G TWI 45 190 G IMD 0536 R1 35 5 Fill d 5 1 Fill the device 5 1 1 Fill unvented installations Proceed as follows for filling the device 1 Open the stop valve 11 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 on the cold water side A causing cold water to flow into the device 5 Fillthe device to the maximum The device is f
17. These devices are to be installed in accordance with the applicable local guidelines C43 Devices on common supply and discharge concentric and or parallel in blocks of flats d Remark Make sure that the flue gas discharge is positioned in a discharge area in which discharge is allowed for the respective device type 3 9 3 Concentric connections The table gives the requirements that the concentric systems shall meet Wy Warning Mount flue gas discharge material with a fall of 5 mm per metre towards the device Requirements for flue gas discharge for concentric systems C13 C33 Diameter Maximum length Maximum num ber of 90 bends Caution Both conditions given in the table shall be complied with When using less than the maximum number of bends it is still not allowed to use more than the maximum pipe length When using less than the maximum pipe length it is still not allowed to use more than the maximum number of bends All this will be explained using an example Practical example of concentric flue gas discharge Example The figure shows a TWI 35 130 The device shall be provided with a 15 m concentric pipe C13 C33 and four 90 bends An inspection shall be carried out for compliance of this configuration with the requirements stated in the table 24 Instruction manual TWI 35 130 G TWI 45 190 G Device with concentric flue gas discharge material According to the table the maximum length is 20 me
18. U Ji 199UIBUI uonej ejsul By 1010 y pue uols inss id JIE ay UBaMjeq Bui qeo ay lqE ay UI yea g os Z posojo uieBe suedo yay ms U93JIAS U91I S eJnssauJd Jv eJnsseJd JIE ay usym Jeeddesip Ajjeonewojne 1m 10119 U9jJIMS eunsseuJd JIE v eoejdes eunssaud ure 9S L JO4JUOD y UO QISIA SIOZ XK SA J041UO2 BY UO lqISIA S10119 10 lqe Bunoousejqnoj 6 iv 061 57 IML O 0EL G IML Jenueu uogonjdsu syed p nb y 10 1eeuirBue uoNNejje sul v yOe UOD S10119 BULLINI909 JO eseo UI 199UIBUI UOHE E SU v 1061402 syed pasinbas y BuroejdaiJ 10 JeeuirDue uonelj ejsur INOA 198 U0N Aiddns 566 y Buuojsai 10 199UIBUI uoNejje sul INOA oe uoo OL aess o u Jl 19 1UBI eoeyns Joy v soe day p lo uuoo pedoud u q sey s u nq v JO puno B y JI 429u2 4ay u eoeyns JOU v Jo Buljqeo v yosuD n di 18010912 Z ZL ees p o uuoo u q sey 19 IuBI eoeyns Joy y JI eAnsues eseud si lA p au uonoeuuoo E9199 3 6 oJez v pue eseug v joeuuoo A 1981107 1esseoeu Ji 19 1UBI eoeyns Joy ay eoejdes suuuO oor pue cy eq pinous SIU ejui eoeyuns JOY BU 92uejsiseJ BY BINSEIN OWA SLL eq pinous siu 1911UBI 29ejuNs Joy y 1910 BENOA eui 1 iuBI eoeyns Joy ay Jo Bui
19. alue does not correspond with the value given in the table 3 4 3 gas data you can adjust the CO value following the procedure 3 11 2 Adjust the CO value Instruction manual TWI 35 130 G TWI 45 190 G 31 3 11 2 Installation t Ea pe Adjust the CO 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 setting screw 4 2 Insert a long screwdriver into the setting hole 5 along the air supply pipe 3 Correct the CO2 value dependent on the deviation by turning the CO setting screw 4 CO setting screw clockwise CO value decreases CO setting screw counterclockwise CO value increases Put back the cap 3 on the CO2 setting screw 4 Remount the cover plate 1 as Remark Before starting up take the time for completing the delivered warranty card In this way you enable us to guarantee the quality of our systems and to optimise our warranty procedure Return this card as soon as possible Your customer will then receive a warranty certificate with our terms of warranty Instruction manual TWI 35 130 G TWI 45 190 G EX 4 Conversion to another gas category U Conversion to another gas category is not possible Instruction manual TWI 35 130 G TWI 45 190 G 33 34 Conversion to another gas category SIE Instruction manual TWI 35 130 G TWI 45 190 G AEX 5 Fill Connections diagram UNVE
20. cale 50 security 11 service 10 49 service engineer 8 set the service interval 66 shut down short period 41 longer period 41 isolate 41 specifications 16 symbol installation engineer 8 service engineer 8 user 8 start up 39 T target groups 8 temperature sensor 12 trade marks 3 T amp P valve 14 U user 8 w warranty claims 52 conditions of installation and use 51 exclusions 52 extent 52 general 51 tank 51 water composition 16 working area 16 58 AEX Instruction manual TWI 35 130 G TWI 45 190 G Instruction manual TWI 35 130 G TWI 45 190 G 59 0308 489 R1 0 Instruction manual TWI 35 130 G TWI 45 190 G
21. cations for air humidity and ambient temperature Air humidity and ambient temperature Air humidity max 93 RH at 25 C Ambient temperature Functional 0 lt t lt 60 C Maximum floor loading In view of the weight of the device take the maximum floor loading into account See the table below Specification for weight in connection with the maximum floor loading Weight of the device filled with water TWI 35 130 199 kg TWI 45 190 271 kg Water composition The device is designed for heating drinking water The drinking water shall comply with the regulations for drinking water for human consumption The table gives an overview of the specifications Specifications for water Water composition Hardness gt 1 00 mmol l alkaline earth ions German hardness gt 5 6 dH French hardness gt 10 0 fH British hardness gt 7 0 eH Conductivity gt 125 muS cm Acidity pH value 7 0 lt pH value lt 9 5 sl Remark VVhen the specifications mentioned in the table are deviated from the protection of the tank can not be guaranteed 11 VVarranty certificate VVorking area n view of the accessibility of the device it is recommended to apply the follovving distances see figure AA on the front side of the device 100 cm BB around the device 50 cm Top side of the device 50 cm Instruction manual TWI 35 130 G TWI 45 190 G EX u Remark When installing the device make sur
22. e flue gas discharge 4 Clean the end of the heat exchanger using tap water 5 Remount the burner 6 Remount the flue gas discharge sl Remark Check the pressure difference again after cleaning Contact the supplier of the device if the pressure difference remains too lovv Proceed as follovvs for completing the maintenance 1 Fill the device 5 Fill 2 Startup the device 7 Start up nstruction manual TVVI 35 130 G TVVI 45 190 G 11 11 4 Warranty general 11 2 Warranty tank 11 3 Conditions of installation and use Warranty certificate In order to register your warranty please fill in the enclosed warranty card and return this to us We will then send you a warranty certificate This certificate will entitle the owner to warranty as described below for a boiler delivered by A O Smith Water Products Company B V in Veldhoven that will be committed towards the owner with respect to this If within one year from the original installation date after investigation and exclusive evaluation by A O Smith a boiler delivered by A O Smith turns out to have a part with the exception of the tank that is not properly functioning as a result of manufacturing or material faults A O Smith will replace or repair this part If within five years from the original installation date after investigation and exclusive evaluation by A O Smith a boiler delivered by A O Smith turns out to have a stainless steel ta
23. e that the device cannot damage the immediate surroundings or lower floors in case of leakage of the tank and or connections If this is the case install the device near a floor discharge or in a metal drip tray of the right size A drip tray shall have a solid discharge and be at least 5 cm deep with a length and width of at least 5 cm larger that the diameter of the device Working area IMD 0528 RO Instruction manual TWI 35 130 G TWI 45 190 G 17 3 Installation 3 4 Technical specifications The tables below contain the technical data 3 4 1 Dimensions of the device Top and bottom views of the device Legends See the table Hx IMD 0529 R1 Dimensions all sizes in mm unless stated otherwise Dimension Desenin vw 00 00 poes fo So M l l 18 Instruction manual TWI 35 130 G TWI 45 190 G Dimension TOS TW2549 R Height ran va connection s heomTaP vave connection 140 r rommaa his e j 2 r r NPT 33 Tas ontrabumerconneeton 7 jeu 2 sewer we Ner 5 mewecwedo rs rwer 3 4 2 General and electrical data S oy RR ow N General and electrical data Description L 810 mwiasieo Mam R X e Maximum operato n
24. ected this indicates the beginning of the ignition cycle Red the gas valve is open Heating cycle of the device Supply power to the Pre heat for device about 35 seconds Fan starts running gas Green LED on valve open Heat demand detected Red LED on Yellow LED on Burner ignites The device will remain in operation until the heat demand ends Fan pre purges for about 6 seconds As soon as there is a heat demand the fan pre purges for 6 seconds in order to remove any combustion gases still present Then the fan stops and heats the hot surface igniter for 35 seconds After this pre heating period the fan starts and the gas valve opens This blows the air gas mixture over the heated hot surface igniter and ignites the burner The hot surface igniter switches off and subsequently works as a flame probe for measuring if the ignition has taken place If the hot surface igniter detects loss of the flame it will shut off the gas supply to the burner Instruction manual TWI 35 130 G TWI 45 190 G 39 T 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 until a max
25. ese l h po Fanspeedatigniion fm jo 5 Imus FREE a 3 4 3 Gas data Gas data Description I2H Unit TWI35 130 TWI 45 190 Gas category 2H G20 20 mbar e esas se Instruction manual TWI 35 130 G TWI 45 190 G 19 3 3 5 Connections diagram Legends Not mentioned numbers are not applicable 1 pressure reducing valve obligatory 3 T amp 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 11 service valve 12 temperature meter optional 13 condensation drainage 14 draw off points 15 expansion valve obligatory 16 expansion vessel obligatory 17 three way aeration valve recommended 18 water tank 19 float valve A cold water supply B hot water discharge C circulation piping D gas supply E water overflow H overflow pipe 20 Installation ve gt The figure shows the connections diagram This diagram is used in the sections describing the actual connecting activities Connections diagram UNVENTED 14 14 14 11 12 B 33 4 i N IMD 0537 R1 VENTED M 17 Y E 19 A 5 18 12044 N R d f pe O i T 456 4 4 Had 0 2
26. ex warehouse delivery of the boiler to be replaced or any parts thereof A O Smith shall not bear the transport labour installation and other costs in connection with the replacement A claim based on the warranty provided shall be deposited with the dealer from whom the boiler was purchased or any other dealer who sells products manufactured by A O Smith The investigation of the boiler as referred to in the Articles 1 and 2 will take place in an A O Smith laboratory Concerning its boilers or any boiler replacement part supplied respectively A O Smith will not provide any warranty or guarantee other than the warranty explicitly stated in this certificate A O Smith shall not accept any liability pursuant to the warranty or otherwise for any injuries to persons or damage to materials caused by a boiler or replacement boiler or any part thereof or the stainless steel tank thereof respectively supplied by A O Smith Instruction manual TWI 35 130 G TWI 45 190 G vw SIE 12 Annex 12 1 Introduction This annex contains The Electrical circuit diagram Legends Instruction manual TWI 35 130 G TWI 45 190 G 53 EX Annex
27. f charge Although utmost care has been taken in ensuring a correct and where necessary complete description of the relevant parts the manual may contain faults and obscurities Should you still discover faults or obscurities please inform us about this It helps us to further improve the documentation If you have any remarks or guestions concerning specific subjects related to the device please do not hesitate to contact A O Smith Water Products Company P O Box 70 5500 AB Veldhoven The Netherlands Telephone free 0800 AOSMITH 0800 267 64 84 General 31 40 294 25 00 Fax 31 40 294 25 39 E mail info aosmith nl Website www aosmithinternational com For problems with respect to connections to gas electricity and water supplies please contact the supplier installation engineer of your installation miz DS Instruction manual TWI 35 130 G TWI 45 190 G AEX PETER RER o SN N O 0 gt Q N 2 1 2 2 2 3 2 4 3 1 3 2 3 3 3 5 3 6 3 7 3 8 3 9 3 10 3 11 54 6 1 6 1 7 1 7 2 7 3 8 1 8 2 8 3 8 4 9 1 9 2 9 3 10 10 1 10 2 10 3 10 4 10 5 Table of content Introduction e c c e e c c c K K K KKK KRK KKK KKK hhh non nn 7 About the device 7 What to do when you smell gas 7 Regulations 7 Target groups
28. imum of 9 ignition attempts If the burner still has not been ignited consult 9 Errors 40 Instruction manual TWI 35 130 G TWI 45 190 G AEX 8 8 1 Introduction 8 2 Shut down the device for a short time 8 3 Electrically isolate the device 8 4 Shut down the device for a long period Shut down You 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 C which protects the device from freezing 1 Maximally turn the thermostat counterclockwise 2 Wait until the fan stops WY Caution The device may be damaged if you do not wait until the fan has stopped purging 3 Electrically isolate the device by turning the main switch between the device and the electricity mains to the 0 position Drain the device when shutting it down for a longer period Proceed as follows Electrically isolate the device 8 3 Electrically isolate the device Close the gas supply Close the stop valve in the hot water pipe Close the supply valve of the protected cold supply setup Connect a discharge hose to the drain valve Open the drain valve Aerate the device or installation allowing it to completely empty N O mom Instruction manual TWI 35 130 G TWI 45 190 G 41 42 Shut down miz bs
29. k Remark a Regular maintenance lengthens the life of the device Both the end user and the service and maintenance engineer are responsible for regular maintenance They shall make clear appointments about this d Remark If the device is not regularly maintained the warranty will become null and void Instruction manual TWI 35 130 G TWI 45 190 G AEX 1 6 Notation system This manual makes use of the following notation system d Remark Attention important notice L Caution Ignoring this text may result in damage of the device r VVarning W Ignoring this text may lead to serious damage of the device and to situations that are dangerous to people 1 7 Overview of this The table provides an overview of the content of this document document Content of this document 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 definitely starting up the device 4 Conversion to another Conversion to another category is not possible category 5 Fill This chapter describes how to fill the device This chapter describes how to drain the device 7 Start up This chapter describes how to start up the device It further describes the general heating cycle of the device 8 Shut down This chapter describes how to shut down the device for a shorter or longer period 9 Errors This chapter is
30. k and adjust the CO value 3 2 Packaging Carefully remove the packaging in order to prevent damaging the device You can best unpack the device when it is close to or on its definite place Caution Move the device only standing up Make sure not to damage the device after unpacking 3 3 Ambient conditions The device is suitable for both closed and open combustion If installed as a closed device it is independent of the installation area for the required air supply Therefore there are no additional ventilation regulations Ifthe device is installed as an open device it should meet the local guidelines and ventilation regulations for open devices The possible device types are B23 C13 C33 C43 C53 and C63 Caution v In view of a risk of explosion and corrosion of the device do not use the device in areas where chemical substances are stored or used Some propellants bleaching agents degreasants and the like spread explosive vapours and or corrosion accelerating vapours Use of the device in an area where such substances are present makes the warranty null and void Instruction manual TWI 35 130 G TWI 45 190 G 15 16 3 3 1 3 3 2 3 3 3 3 3 4 Installation t Ea pe Air humidity and ambient temperature The installation area should be frost free or be protected against frost The table gives the ambient conditions that shall be observed in order to be able to ensure the functioning of the applied electronics Specifi
31. lly isolated until you are ready to start it up 1 Connect phase L zero Z and earth of the power cable to the connector C Mount the power cable into the strain relief D Connect the power cable to the main switch Remount the cover plate PON Isolating transformer An isolating transformer is used when a floating zero is present Consult the mounting instructions delivered with the isolating transformer contact the supplier for the correct isolating transformer d Remark Fill the device before starting up the device and or checking the CO value 5 Fill w Caution Checking the CO value is obligatory when starting up the device for the first time ul Remark You obviously need a CO gauge for checking the CO value nstruction manual TVVI 35 130 G TVVI 45 190 G EX Gas control Legends Not mentioned numbers are not applicable 1 screws 2 cover plate 3 sealing cap 4 CO setting screw 5 setting hole IMD 0535 RO 3 11 1 Checking procedure 1 Position the probe of the CO gauge into the flue gas discharge duct of the concentric venturi tube Open the gas supply and bleed the air from the gas system Switch on the voltage of the device using the main switch of the device Turn the thermostat clockwise until the device starts up After the red light is lit wait for about 2 minutes before reading the CO gauge 9 gt N If the CO v
32. ls down the flue gasses As the cooled down flue gasses are finally led along the cold water at the bottom of the tank as well the flue gasses start condensating Condensation causes release of energy heat that is also transferred to the water which improves the output The condensate that is formed with this heating is discharged through the siphon 20 The insulating layer 2 prevents loss of heat The temperature sensor 1 measures the water temperature As soon as the measured temperature is below the set water temperature the electronic control observes a heat demand The gas control 7 opens after about half a minute and the gas mixes with the air The hot surface igniter 9 ignites this mixture and the water is heated As soon as the measured temperature is above the set water temperature the heat demand ends and the electronic control stops the heating cycle Introduction The electronic control monitors the water temperature and ensures safe combustion This is done by the Security of the water temperature the Gas control the Fan the Air pressure switch the lonisation detection Instruction manual TWI 35 130 G TWI 45 190 G AEX 2 4 2 2 4 3 2 4 4 2 4 5 2 4 6 Security of the water temperature The safety switch or ECO Energy Cut Off switches off the device when the water temperature exceeds 95 C As soon as the temperature has sufficiently dropped the ECO is reset automaticall
33. lve 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 11 service valve 12 temperature meter optional 13 condensation drainage 14 draw off points 15 expansion valve obligatory 16 expansion vessel obligatory 17 three way aeration valve recommended 18 water tank 19 float valve cold water supply hot water discharge circulation piping gas supply water overflow overflow pipe zmoomp Drain Connections diagram UNVENTED IMD 0537 R1 VENTED H let p A 17 E a an 18 6 2041 gt lt qi Hs y Y NI Y 4 5 6 4 c amp K Ho o q L amp 5 xo T q 13 IMD 0536 R1 nstruction manual TWI 35 130 G TVVI 45 190 G 37 6 6 1 Drain unvented installations 6 2 Drain vented installations 38 Drain AEX 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 Shut off the gas supply 10 Close the stop valve 11 in the hot water pipe Clo
34. mainly meant for the installation engineer and the service and maintenance engineer It describes the errors of the device These errors are shown on the display A table gives the possible cause and solution However an end user can also find additional information about the device here 10 Maintenance This chapter describes how to determine the frequency for maintenance activities Both the end user and the service and maintenance engineer are responsible for regular maintenance They shall make clear appointments about this Remark If the device is not regularly maintained the warranty will become null and void Instruction manual TWI 35 130 G TWI 45 190 G 9 1 Introduction TK 11 Warranty certificate This chapter contains the terms of warranty This chapter contains the electrical circuit diagram 10 Instruction manual TWI 35 130 G TWI 45 190 G AEX 2 1 2 2 Introduction General operation of the device Legends IMD 0527 tO ON OOM Temperature sensor ECO Insulating layer Air pressure switch Burner Venturi Air supply pipe Gas control Cover plate Hot surface igniter Fan Thermostat Hot water outlet Heat exchanger Tank Combustion chamber Cold water inlet Concentric measuring tube Air supply hose Flue gas discharge Siphon Transformer 230 VAC 120 VAC Drain valve Connector Transformer 120 VAC 24 VAC
35. ning discharge of flue gasses requirements for gas consuming systems regulations concerning inside sewer systems in buildings regulations of the fire department electricity companies and the municipality Further the installation shall comply with the regulations of the manufacturer Instruction manual TWI 35 130 G TWI 45 190 G 7 1 4 1 5 Target groups Maintenance Introduction Y En pe 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 page for which target group the information is intended See the table Symbols per target group Symbol Target group End user Installation engineer Service and maintenance engineer 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 For determining the correct maintenance frequency it is advised to have the service and maintenance engineer check the gas side and the water side of the device three months after installation The maintenance frequency can be determined on the basis of this chec
36. nk that is leaking as a result of rust or corrosion from the water side A O Smith will replace the entire boiler by a brand new one of similar size and quality The replacement boiler will have a warranty that will be valid for the remaining period of the warranty for the original boiler delivered Notwithstanding the provisions in Article 2 the warranty term will be reduced to one year after the original installation date if unfiltered or softened water is flowing through the boiler or left in it The warranty referred to in Articles 1 and 2 only apply if the following conditions are met a The boiler is installed according to the installation instructions of A O Smith for the specific model as well as according to the local and national installation and building regulations instructions and rules b The boiler will remain installed in the original installation area C Only drinking water is used which is allowed to circulate freely at all times a separately installed heat exchanger is obligatory for heating saline or corrosive water d Thetank has been protected against harmful scale deposits by means of periodic maintenance e The boiler water temperatures do not exceed the maximum setting of the thermostats that are part of the boiler f The water pressure and or heat load do not exceed the maximum values indicated on the boiler s identification plate g The boiler has not been installed in a corrosive atmosphere or enviro
37. nment h The boiler has been provided with a by an authorised body approved protected cold supply setup of sufficient capacity not greater than the operating pressure indicated on the boiler and if applicable with a temperature and pressure relief valve also approved by an authorised body which has been mounted according to the installation instructions of A O Smith applicable to the specific boiler model as well as according to the local and national instructions regulations and rules Instruction manual TWI 35 130 G TWI 45 190 G 51 11 11 4 Exclusions 11 5 Extent of the warranty 11 6 Claims 11 7 Obligations of A O Smith 52 Warranty certificate Ea h b l The vvarranty 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 modification incorrect and or deviating use of the boiler and if attempts were made to repair leaks C if contamination or other impurities were allowed to flow into the tank d ifthe conductivity of the water is less than 125 mS and or the hardness alkaline earth ions of the water is less than 1 00 mmol l 3 3 3 Water composition if unfiltered recirculated water flows through or is stored in the boiler if the owner has attempted to repair a defective boiler himself gt o A O Smith s commitments pursuant to the warranty provided are confined to the free of charge
38. nstallations However A O Smith recommends using a T amp P valve with vented installations as well A T amp P valve Temperature amp Pressure valve monitors the pressure in the tank and the water temperature at the upper part of the tank The valve will open when the pressure in the tank becomes too high gt 10 bars or when the water temperature gets too high gt 97 C The hot water can now flow out of the tank As the device is under water piping pressure cold water will automatically flow into the tank The valve remains open until the unsafe situation has been removed The device typically has a connecting point for a T amp P valve 3 6 2 Hot water side Instruction manual TWI 35 130 G TWI 45 190 G EX 3 Installation W Warning 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 fire brigade The device shall only be installed in an area that amply meets the national and local ventilation regulations 1 3 Regulations 3 1 Introduction This chapter describes the installation activities to be carried out before definitely starting up the device 7 Start up being Packaging Ambient conditions Technical specifications e Connections diagram VVater connections Gas connection Air supply and flue gas discharge Electrical connection Chec
39. nstruction manual TVVI 35 130 G TVVI 45 190 G AEX 9 1 9 Introduction Errors A distinction is made between General errors General errors are not visible on the control General errors are Gas smell Insufficient or no hot water Water leakage Explosive ignition The manual includes a table with general errors 9 2 Troubleshooting table for general errors Errors visible on the control The control displays errors by means of an indicator LED This LED is visible through the inspection window in the cover plate of the control Different errors are indicated by different flashing patterns of the LED The different errors are divided into three groups SOFT LOCKOUT SL The control automatically resets after 60 minutes SOFT LOCKOUT HARD LOCKOUT SL3 The control automatically resets after 60 minutes with a maximum of three attempts If the burner still has not been ignited contact the installation engineer SELF CLEARING SC These errors disappear automatically if the cause of the error is no longer present The device will automatically start up then The manual includes a table with Error messages that the control displays 9 3 Troubleshooting table for errors visible on the control The electronic control can be reset by maximally turning the thermostat counterclockwise and returning it again to its original position Instruction manual TWI 35 130 G TWI 45 190 G 43 vy 061
40. oduction Prepare maintenance Maintenance 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 J Regular maintenance lengthens the life of the device For determining the correct maintenance frequency it is advised to have the service and maintenance engineer check the gas side and the water side of the device three months after installation The maintenance frequency can be determined on the basis of this check Proceed as follows for testing the proper functioning of all components 1 Maximally turn the thermostat counterclockwise 2 Wait until the fan stops 3 Turn the thermostat to its original position Then draw off water to create a heat demand 4 Check if the heating cycle runs correctly 7 3 Heating cycle of the device 5 Check the CO value and adjust this if necessary 3 11 Check and adjust the CO value 6 Check all parts of the flue gas discharge system for proper fastening 7 Check the pressure difference of the pressure switch see the table Clean the heat exchanger and burner if the pressure difference is too low 10 4 2 Clean the burner AND 10 4 3 Clean heat exchanger Pressure difference of air pressure switch Device Measured pressure difference over air pressure swi
41. qeo y yoauD PND eouppel3 Z ZL ees p o uuoo Auado d u q sey eoeyns Joy y JI YDIUN Auess999u Jl 0 1 U09 566 ay 20ejdoy SYYONMS DAJEA 586 eui Jl A ddns 566 y 910759 uesseoeu J 104002 566 ay uo eunsseJd eJd Sy YOBYD 10144109 se y 10 586 jenuew y Jo pue A PA Ajddns 586 sulew y 4 0 GL 2 2q Pinoys siu SeyoA Alddns ay NO 00 a eyon Ajddns yno UONESIUOI UI 10417 pejoeuuoo A 199400u 0197 pue oseud oejuns Joy y Ul 10443 Jeuunq o Ajddns se6 oN edid 566 aui ul HV Sseoons JNOUJIM s dweye uoniuBi Say 1S ses nd 1u614 epueululoo E INS Jueya ye s seuueg A ddns se6 on 8v 061 957 IML D 0 L S IML Jenueu uogongsu 011409 o1u0J o9Je 8129091 10418 OY JI JoJjuoo oiuoJjoeje v eoejdes y UI sued aut 10 JeeuiBue uonejejsur INOA 1963002 Jo uoo Sluono l BY Josey ojuoo eAnosjeq 1S 6 011409 o1u0J o9Je 8129091 10418 BUI JI oiuoJjoeje v eoejdes y UI 10119 sued su 10 JeeuiBue UONE EISUI INOA 108100 Sluono l aui JOSAY 101 U09 eAnoejeq aS 8 SADO20 1 10418 OY JI 0 S3luolno BUI eoejdes l onuoo Sluono l BY Jesay 101 U09
42. s absolutely necessary to connect the phase L of the mains to the phase of the device and to connect the zero Z of the mains to the zero of the device L Caution No voltage difference is allowed between the zero Z and the earth If this is the case apply an isolating transformer 3 10 4 Isolating transformer Please contact A O Smith for additional information or for ordering this isolating transformer The figure shows a view of the electrical connector block Instruction manual TWI 35 130 G TWI 45 190 G Connector block IMD 0534 RO 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 d Remark Consult the electrical circuit diagram for connecting the electrical components Instruction manual TWI 35 130 G TWI 45 190 G 29 3 11 30 Check and adjust the CO value 3 10 3 3 10 4 nstallation t E pe Connect the mains voltage The device is delivered without power cable and main switch sl Remark n order to supply voltage to the device connect the device to the mains voltage using a permanent electrical connection Place a double pole main svvitch vvith a contact opening of min 3 mm betvveen this permanent connection and the device The power cable shall have a core of min 3 x 1 0 mm m Warning Keep the device electrica
43. s applicable to the TWI 35 130 and TWI 45 190 The construction method and the equipment of the device are in conformity with the European standard for gas fired storage water heaters for the production of domestic hot water EN 89 With this the devices comply with the European Directive for Gas Devices and so they have the right to the CE mark n Warning W Carefully read this manual before starting up the boiler Not reading this manual and not following the given instructions may lead to personal injuries and damage to the device n Warning 77 In case of smelling gas No open fire No smoking Avoid sparking Do not use any electric switches including telephone plug or bell Open windows and doors Shut off the mains gas supply valve Warn occupants and leave the building After having left the building warn the gas company or the installation engineer As end user installation engineer or service and maintenance engineer you shall make sure that the entire installation at least complies with the locally applicable building regulations guidelines for existing gas systems formulated by the electricity company guidelines for natural gas systems and the corresponding practical guidelines safety regulations for low voltage systems regulations concerning drinking water supply regulations concerning ventilation in buildings regulations concerning supply of combustion air regulations concer
44. se the stop valve 4 in the cold water pipe A Connect the discharge hose to the drain valve 9 Open the drain valve 9 Aerate the device or installation allowing it to completely empty For some activities the device needs to be drained Proceed as follows 1 G gt N Electrically isolate the device by turning the main switch between the device and the electricity mains to the 0 position Shut off the gas supply 10 Close the stop valve 11 in the hot water pipe Close the stop valve 4 between de water tank and the cold water inlet A Connect the discharge hose to the drain valve 9 Open the drain valve 9 Aerate the device or installation allowing it to completely empty Instruction manual TWI 35 130 G TWI 45 190 G 7 7 1 Introduction 7 2 Start up 7 3 Heating cycle of the device Start up 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 of the device using the main switch between the device and the electricity mains 4 Setting the device to the desired temperature This device has been equipped with an electronic hot surface igniter that ignites the burner There are three LEDs indicating the different operating conditions Green the device is live Yellow a heat demand has been det
45. supply pipes are suitable for delivering sufficient capacity to the device See D in the connections diagram 3 5 Connections diagram 1 Mount the gas valve 10 in the gas supply pipe 2 Purge the gas pipe before use 3 Close the gas valve n Warning 77 Check for leakages after mounting Introduction This section describes the following subjects Requirements for flue gas discharge material Parallel connections Requirements for flue gas discharge material Warning The installation shall be carried out by a recognised installation engineer in accordance with the generally and locally applicable regulations 1 3 Regulations There are various possibilities for connecting the air supply and flue gas discharge dependent on the inspected device types The devices have been inspected for the device types B23 C13 C33 C43 C53 and C63 The figure and the table provide information about these device types Please contact the manufacturer if you require an explanation of the possibilities Instruction manual TWI 35 130 G TWI 45 190 G Device types C43 B23 C13 Instruction manual TWI 35 130 G TWI 45 190 G C53 IMD 0531 RO 23 3 Installation Explanation of device types Supply and discharge in different pressure area Devices delivered without flue gas discharge materials and or terminal
46. tch TWI 35 130 2 730 Pa TWI 45 190 2 400 Pa 8 Test the functioning of the expansion valve of the protected cold supply setup The water has to flow out in a forceful jet 9 Test the functioning of the T amp P valve if applicable The water has to flow out in a forceful jet 10 Check the discharge pipes of the expansion valve and remove any present scale deposits 11 Drain the device see Drain Instruction manual TWI 35 130 G TWI 45 190 G 49 10 10 3 Water side maintenance 10 4 Gas side maintenance 10 5 Complete maintenance 50 10 3 1 10 3 2 10 4 1 10 4 2 10 4 3 Maintenance 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 C is recommended to ensure low scale deposit Descale using the appropriate agents A descaling instruction is available for detailed information Clean the condensation drainage Regularly clean the condensation drainage and the siphon to avoid stoppage Introduction Proceed as follows for gas side maintenance 1 Clean the burner 2 Clean the heat exchanger Clean the burner ilz Dismount the burner 2 Remove the contamination present on the burner 3 Remount the burner Clean the heat exchanger 1 Dismount the burner 2 Clean the combustion chamber of the heat exchanger using a vacuum cleaner and a soft brush 3 Dismount th
47. tres and the allowed number of 90 bends is 5 Both requirements are met Specifications Caution A O Smith prescribes the use of a roof or wall flue terminal approved for the device with the C13 and C33 device types Use of an improper roof or wall flue terminal may lead to an error Specification of concentric wall flue terminal C13 Subiect Description Wall flue terminal set 1x Wall flue termi Item no TWI 35 130 0302 515 0 nal incl wall plate amp clamping strip TWI 45 190 0302 515 1x Bend 90 Flue gas discharge Thick walled aluminium with lip ring sealing Air supply Thin wall galvanised sheet steel Pipe diameters Flue gas discharge TWI 35 130 80 mm TWI 45 190 80 mm Air supply TWI 35 130 125 mm TWI 45 190 125 mm 1 It is not allowed to use any other wall flue terminal You can order the wall flue terminal mentioning the item number with A O Smith manufacturer or wholesaler s Instruction manual TWI 35 130 G TWI 45 190 G 25 Installation t E pe Specification of concentric roof flue terminal C33 Subject Description Roof flue terminal set 1x Roof flue Item no TWI 35 130 0305 042 0 terminal incl clamping strip TWI 45 190 0305 042 0 1x Mounting flange Flue gas discharge Thick walled aluminium with lip ring sealing Air supply Thin wall galvanised sheet steel Pipe diameters Flue gas discharge TWI 35 130 80 mm TWI 45 190 80 mm Air s
48. ull when the water flows out of the closest draw off point in a forceful jet 6 Bleed the entire installation for example by opening all draw off points 7 device will now be under water piping pressure Water should not come out of the expansion valve 15 and out of the T amp P valve 3 now If so it might be that The water piping pressure is larger than the required 8 bars Mount a pressure reducing valve 1 after all The expansion valve of the protected cold supply setup is defective or incorrectly mounted 5 1 2 Fill vented installations Proceed as follows for filling the device 1 Open the stop valve 11 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 on the cold water side A causing cold water to flow into the device 5 Fillthe device to the maximum The device is full when the water flows out of the closest draw off point in a forceful jet 6 Bleed the entire installation for example by opening all draw off points 7 The device will now be under water piping pressure Water should not come out of the T amp P valve 3 now If so the T amp P valve may be defective or have been mounted incorrectly 36 Instruction manual TWI 35 130 G TWI 45 190 G AEX 6 Legends Not mentioned numbers are not applicable 1 pressure reducing valve obligatory 3 T amp P va
49. upply TWI 35 130 125 mm TWI 45 190 0 125 mm 1 It is not allowed to use any other roof flue terminal You can order the roof flue terminal mentioning the item number with A O Smith manufacturer or wholesaler s 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 Warning Mount flue gas discharge material with a fall of 5 mm per metre towards the device Requirements for flue gas discharge for parallel systems Diameter Maximum running length Lain Lapp 90 bend 45 bend 1 The given larger diameter can be used if the maximum running length is insufficient When using a larger diameter this shall be used for both the air supply and the flue gas discharge Use the longest pipe for calculating the pipe length If for example the flue gas discharge pipe is 10 metres and the air supply pipe is 15 metres use the 15 metres for calculating the length Then add the Lequivalent to these 15 metres for each 90 and 45 bend in both the air supply and the flue gas discharge All this will be explained using a practical example Practical example of parallel flue gas discharge Example The figure shows a TWI 35 130 The device is to be provided with a 25 m parallel pipe with a diameter of 100 mm and eight 90 bends An inspection shall be carried out for compliance of the configuration with the requirements stated in the table
50. y Contact the installation engineer ifthe ECO repeatedly switches off the device Gas control The electronic control opens the gas control allowing supply of gas to the burner The gas control has two valves as a safety device Both valves shut off the gas supply Fan The fan 10 ensures optimum air supply during the heat demand In view of safety the fan makes sure that the combustion chamber is purged before ignition takes place This is called pre purging Air pressure switch The air pressure switch guarantees discharge of flue gasses and supply of air during pre purging and operation of the device The air pressure switch is typically open When the pressure difference is sufficient the pressure switch closes If however a disturbance occurs the pressure switch opens again and the heating cycle is interrupted The table gives the trip points for each device Remark The trip point of the pressure switch cannot be adjusted Trip point of the pressure switch Device Pressure difference TWI 35 130 700 Pa TWI 45 190 370 Pa lonisation detection The electronic control uses the hot surface igniter for flame detection by means of ionisation detection The electronic control closes the gas valve as soon as it observes that there is no flame while gas is flowing Instruction manual TWI 35 130 G TWI 45 190 G 13 2 5 14 2 Safety of the installation 2 5 1 2 5 2 2 5 3 Operation of the device EN h
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