A.O. Smith TWI 45-190, TWI 35-130 Check and adjust the CO2-value Connect the mains voltage

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3 Installation

3.11Check and adjust the CO2-value

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 this permanent connection and the device. The power cable shall have a core of min. 3 x 1.0 mm².

Warning

Keep the device electrically 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).

2.Mount the power cable into the strain relief (D).

3.Connect the power cable to the main switch.

4.Remount the cover plate.

3.10.4Isolating 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).

Remark

Fill the device before starting up the device and/or checking the CO2-value (5 “Fill”).

Caution

Checking the CO2-value is obligatory when starting up the device for the ﬁrst time.

Remark

You obviously need a CO2-gauge for checking the CO2-value.

30	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 Installation ErrorsMaintenance Operation of the deviceTable of content Warranty certiﬁcateAbout the device What to do when you smell gas RegulationsIntroduction Introduction Target groupsInstallation Chapter Target groups DescriptionWarranty certiﬁcate This chapter contains the terms of warrantyOperation of the device Introduction This chapter will cover in the given orderSecurity of the device Introduction Operation of the deviceHeating cycle Security of the water temperature Air pressure switchGas control 4 Fan3 T&P valve Unvented installationVented installation Installation PackagingInstallation Working area Dimensions of the device Dimension Description TWIDimension Description TWI Description Unit TWIVented Cold water side Hot water sideCirculation piping Condensation drainageAir supply and ﬂue gas discharge Introduction Requirements for ﬂue gas discharge materialDevice types Device types Description Concentric connectionsDevice Diameter Maximum length Maximum num Ber of 90 bends Practical example of concentric ﬂue gas discharge ExampleSpeciﬁcations Subject DescriptionParallel connections Device Diameter Maximum running lengthBend Practical example of parallel ﬂue gas discharge Example Device with parallel ﬂue gas discharge material Electrical connection PreparationConnector block Check and adjust the CO2-value Connect the mains voltage Isolating transformerChecking procedure Gas controlAdjust the CO2-value Conversion to another gas category Conversion to another gas category Fill UnventedFill the device Fill unvented installations Fill vented installationsDrain Drain vented InstallationsDrain unvented Opening the gas valve 3.5 Connections diagram Start upStart up Shut down Introduction You canFor 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 Symptom Cause Solution Remark Insufﬁcient or no Hot waterTroubleshooting table for errors visible on the control Light pulses Cause Solution RemarkLight pulses Cause Solution Remark SL3 See 12.2 Electrical circuit diagramTWI Maintenance Introduction Prepare maintenanceMaintenance Warranty certiﬁcate 11.1 Warranty general11.2 Warranty tank 11.3 ConditionsWarranty certiﬁcate 11.6 Claims11.7 Obligations SmithAnnex Electrical circuit diagram AnnexWiring Annex Index ConnectUser Warranty IndexPage 0308 489 R1.0