A.O. Smith TWI 45-190, TWI 35-130 service manual Installation

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3 Installation

3.3.1Air 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.

Speciﬁcations for air humidity and ambient temperature

Air humidity and ambient temperature

Air humidity

max. 93% RH at +25°C

Ambient temperature

Functional: 0 ≤ t ≤ 60°C

3.3.2Maximum 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

3.3.3Water 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

(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

Remark

When the speciﬁcations mentioned in the table are deviated from, the protection of the tank can not be guaranteed (11 “Warranty (certiﬁcate)”).

3.3.4Working area

In view of the accessibility of the device, it is recommended to apply the following 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.

16	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 Maintenance InstallationErrors Operation of the deviceTable of content Warranty certiﬁcateWhat to do when you smell gas Regulations IntroductionAbout the device 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 orderOperation of the device Heating cycleSecurity of the device Introduction Gas control Security of the water temperature Air pressure switch 4 FanUnvented installation Vented installation3 T&P valve Installation PackagingInstallation Working area Dimensions of the device Dimension Description TWIDimension Description TWI Description Unit TWIVented Circulation piping Cold water sideHot water side Condensation drainageAir supply and ﬂue gas discharge Introduction Requirements for ﬂue gas discharge materialDevice types Device Diameter Maximum length Maximum num Ber of 90 bends Device types DescriptionConcentric connections Practical example of concentric ﬂue gas discharge ExampleSpeciﬁcations Subject DescriptionBend Parallel connectionsDevice Diameter Maximum running length Practical example of parallel ﬂue gas discharge ExampleDevice 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 Installations Drain unventedDrain vented Opening the gas valve 3.5 Connections diagram Start upStart up For a short time Shut downIntroduction You can Electrically isolateShut down Errors Introduction Distinction is made between General errorsErrors visible on the control Symptom Cause Solution Remark Gas smell Water leakageExplosive ignition 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 11.2 Warranty tank Warranty certiﬁcate11.1 Warranty general 11.3 Conditions11.7 Obligations Warranty certiﬁcate11.6 Claims SmithAnnex Electrical circuit diagram AnnexWiring Annex Index ConnectUser Warranty IndexPage 0308 489 R1.0