A.O. Smith TWI 35-130, TWI 45-190 service manual Device with parallel ﬂue gas discharge material

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Device with parallel ﬂue gas discharge material

IMD-0533 R0

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

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Contents 35-130 45-190 Your installer Page Page Copyright 2007 A.O. Smith Water Products Company Page Errors InstallationMaintenance Operation of the deviceWarranty certiﬁcate Table of contentAbout the device What to do when you smell gas RegulationsIntroduction Target groups IntroductionChapter Target groups Description InstallationThis chapter contains the terms of warranty Warranty certiﬁcateIntroduction This chapter will cover in the given order Operation of the deviceSecurity of the device Introduction Operation of the deviceHeating cycle Air pressure switch Security of the water temperatureGas control 4 Fan3 T&P valve Unvented installationVented installation Packaging InstallationInstallation Working area Dimension Description TWI Dimensions of the deviceDescription Unit TWI Dimension Description TWIVented Hot water side Cold water sideCirculation piping Condensation drainageRequirements for ﬂue gas discharge material Air supply and ﬂue gas discharge IntroductionDevice types Concentric connections Device types Description Device Diameter Maximum length Maximum num Ber of 90 bends Practical example of concentric ﬂue gas discharge ExampleSubject Description SpeciﬁcationsDevice Diameter Maximum running length Parallel connectionsBend Practical example of parallel ﬂue gas discharge ExampleDevice with parallel ﬂue gas discharge material Preparation Electrical connectionConnector block Isolating transformer Check and adjust the CO2-value Connect the mains voltageGas control Checking procedureAdjust the CO2-value Conversion to another gas category Conversion to another gas category Unvented FillFill vented installations Fill the device Fill unvented installationsDrain Drain vented InstallationsDrain unvented Start up Opening the gas valve 3.5 Connections diagramStart up Introduction You can Shut downFor a short time Electrically isolateShut down Errors visible on the control ErrorsIntroduction Distinction is made between General errors Explosive ignition Symptom Cause Solution Remark Gas smellWater leakage Hot water Symptom Cause Solution Remark Insufﬁcient or noLight pulses Cause Solution Remark Troubleshooting table for errors visible on the controlSee 12.2 Electrical circuit diagram Light pulses Cause Solution Remark SL3TWI Introduction Prepare maintenance MaintenanceMaintenance 11.1 Warranty general Warranty certiﬁcate11.2 Warranty tank 11.3 Conditions11.6 Claims Warranty certiﬁcate11.7 Obligations SmithAnnex Annex Electrical circuit diagramWiring Annex Connect IndexIndex User WarrantyPage 0308 489 R1.0