A.O. Smith T-H3S-DV Bedienungsanleitung

Gas Tankless Water HeaterTM

Suitable for potable water heating and space-heating

Please refer to local codes for space-heating compliance.

540 (T-H3)

model only

If you have any questions, please

call or write to:

500 Tennessee Waltz Parkway

Ashland City, TN 37015

Toll Free: 1-877-737-2840

WARNING

- Do not store or use gasoline or other

flammable vapors and liquids in the vicinity

of this or any other appliance.

- WHAT TO DO IF YOU SMELL GAS

• Donottrytolightanyappliance.

• Donottouchanyelectricswitch,donot

use any phone in your building.

• Immediatelycallyourgassupplierfrom

a neighbor's phone. Follow the gas

supplier's instructions.

• Ifyoucannotreachyourgassupplier,call

the fire department.

- Installation and service must be performed

by a qualified installer, service agency or the

gas supplier.

On-Demand Water Heater

Installation Manual and Owner’s Guide

ANSI Z21.10.3 and CSA 4.3

If the information in these

instructions is not followed

exactly, a fire or explosion may

result causing property damage,

personal injury or death.

FEATURING

• ENDLESSHOTWATER

• ON-DEMANDUSAGE

• COMPACT,SPACESAVING

• ENERGYCONSERVATION

• COMPUTERIZEDSAFETY

• NOPILOTLIGHT

• Satisfiesthe2012SCAQMDRule

1146.2 for Ultra-Low NOx

Emissions

• EASY-LINKSYSTEMAND

MULTI-UNIT SYSTEM

(540 (T-H3) model only)

Models

• 240Outdoor(T-H3J-OS)

• 340Outdoor(T-H3S-OS)

• 540Outdoor(T-H3-OS)

• 240Indoor(T-H3J-DV)

• 340Indoor(T-H3S-DV)

• 540Indoor(T-H3-DV)

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CONTENTS

Installation Manual

　SPECIFICATIONS.......................................................................................................................... 4

　INTRODUCTION .......................................................................................................................... 5

　SAFETY GUIDELINES.................................................................................................................... 6

　INSTALLATION............................................................................................................................. 7

　　General.....................................................................................................................................7

　　Clearances................................................................................................................................9

　　Included accessories................................................................................................................9

　　Optional items..........................................................................................................................9

　　Warning for installations........................................................................................................11

　　High-altitudeinstallations......................................................................................................12

　　Ventinginstructions...............................................................................................................13

　　Gas supply and gas pipe sizing...............................................................................................25

　　Water connections................................................................................................................27

　　Condensate drain..................................................................................................................28

　　Electrical connections............................................................................................................30

　　Temperature remote controller............................................................................................31

　　Easy-Link System....................................................................................................................33

　　Multi-UnitSystem..................................................................................................................37

　APPLICATIONS............................................................................................................................38

　INITIAL OPERATION...................................................................................................................40

Owner's Guide

　OPERATING SAFETY .................................................................................................................. 42

　NORMAL OPERATION ............................................................................................................... 44

　　Temperature controller and Remote controller.....................................................................44

　　General...................................................................................................................................44

　　Temperaturesettings.............................................................................................................45

　　Temperature table of controller.............................................................................................45

　　Additionalfeatures.................................................................................................................46

　　Temperature settings on the PCB (Without remote controller)............................................47

　　Flow.......................................................................................................................................48

　　Freeze protection system.......................................................................................................48

　　Maintenance and service.......................................................................................................49

　　Unit draining and filter cleaning............................................................................................49

　TROUBLESHOOTING...................................................................................................................50

　　General...................................................................................................................................50

　　Error codes............................................................................................................................52

　COMPONENTSDIAGRAM...........................................................................................................55

　PARTS LIST.....................................................................................................................................59

　OUTPUT TEMPERATURE CHART..................................................................................................62

　LIMITED WARRANTY..................................................................................................................63

Contents

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Installaon Manual

Installation Manual

CONGRATULATIONS

Congratulations and thank you for choosing our tankless water heater.

Before use, we recommend that you read through this safety manual

carefully. Please refer to the back of the manual for details about the

warranty. Keep this manual for future reference.

If you lose the manual, contact the manufacturer or your local

distributor. When you call, please tell us the model number and the

serial number of your unit written on the rating plate of the water

heater.

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4Page

Specicaons

Installaon Manual

SPECIFICATIONS

*40 psi or above is recommended for maximum flow.

** The Manifold Pressure is the factory setting and generally should not need adjustment.

NOTE:

• Checktheratingplatetoensurethisproductmatchesyourspecifications.

• InaccordancewithANSIZ21.10.3,COemissiondoesnotexceed400PPMfornormalinput.

•The manufacturer reserves the right to discontinue, or change at any time, specifications or designs

without notice and without incurring obligation.

Model 240

Indoor

(T-H3J-DV)

240

Outdoor

(T-H3J-OS)

340

Indoor

(T-H3S-DV)

340

Outdoor

(T-H3S-OS)

540

Indoor

(T-H3-DV)

540

Outdoor

(T-H3-OS)

Natural Gas Input

(Operating Range) BTU/h Min.:15,000

Max.:160,000

Min.:15,000

Max.:180,000

Min.:15,000

Max.:199,000

Propane Input

(Operating Range) BTU/h Min.:13,000

Max.:160,000

Min.:13,000

Max.:180,000

Min.:13,000

Max.:199,000

Gas Connection 3/4" NPT

Water Connections 3/4" NPT

Water Pressure* psi

(MPa) 15-150(0.1-1)

Natural gas

Inlet Pressure

" W.C.

(kPa)

Min.5.0(1.24)

Max.10.5(2.61)

Propane

Inlet Pressure

" W.C.

(kPa)

Min.8.0(1.99)

Max.14.0(3.48)

Manifold

Pressure**

Natural

Gas

" W.C.

(Pa)

1.50

(373)

1.70

(423)

2.45

(610)

2.1

(523)

2.95

(734)

2.70

(672)

Propane " W.C.

(Pa)

2.10

(523)

1.90

(473)

2.7

(672)

2.55

(635)

3.3

(821)

3.15

(784)

Weight lbs. (kg) 58(26.3) 58(26.2) 58(26.3) 58(26.2) 59(26.8) 59(26.9)

Dimensions inch H22.4xW17.7xD10.7

H570xW450xD272

Ignition Electric Ignition

Electric

Supply VAC / Hz 120/60

Consumption

Operation W / A 72.7/0.61 78.2/0.65 89.0/0.74

Standby W / A 3.1/0.03 3.1/0.03 4.2 / 0.04

Freeze-

Protection W / A 174/1.5 174/1.5 175/1.5

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INTRODUCTION

•This manual provides information necessary for the installation, operation, and maintenance

of the water heater.

•The model description is listed on the rating plate which is attached to the side panel of the

water heater.

•Please read all installation instructions completely before installing this product.

•If you have any problems or questions regarding this equipment, consult the manufacturer or

its local representative.

•This equipment is an on-demand, tankless water heater designed to efficiently supply endless

hot water for your needs.

•These high efficiency models have a built-in secondary heat exchanger that absorbs latent

heat from the exhaust gas.

•The 240 Indoor (T-H3J-DV), 340 Indoor (T-H3S-DV) and 540 Indoor (T-H3-DV) models are

onlytobeinstalledindoors.The240Outdoor(T-H3J-OS),340Outdoor(T-H3S-OS)and540

Outdoor (T-H3-OS) models are only to be installed outdoors.

•The principle behind tankless water heaters is simple:

*This diagram illustrates tankless water heater design concepts only and does not accurately

represent the water heater’s physical description.

1. A hot water tap is turned on.

2. Water enters the heater.

3. The water flow sensor detects the water flow.

4. The computer initiates the fan motor and sends a signal to the igniter to create an ignition spark.

5. The gas ignites and flames appear within the burner chamber.

6. Water circulates through the heat exchanger and then gets hot.

7. Using thermistors to measure temperatures throughout the water heater, the computer modulates

the gas and water valves to ensure proper output water temperature.

8. When the tap is turned off, the unit shuts down.

Introducon

Installaon Manual

Exhaust

Secondary

heat exchanger

Intake port

Condensate

drain port

Cold water inlet

Gas

Hot water outlet

Computer board Fan motor

Gas valves

Thermistor

Bypass valve

Primary

heat exchanger

Exhaust thermistor

Water control valve

Thermistor

Flow sensor

Burners

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SAFETY GUIDELINES

SAFETY DEFINITION

GENERAL

1. Follow all local codes, or in the absence of local codes, follow the most recent edition of the National

FuelGasCode:ANSIZ223.1/NFPA54intheUSAorCAN/CSAB149.1NaturalGas,PropaneInstallation

Code in Canada.

2. Properly ground the unit in accordance with all local codes or in the absence of local codes, with the

NationalElectricalCodes:ANSI/NFPA70intheUSAorCSAstandardC22.1CanadianElectricalCode

Part1inCanada.

3. Carefully plan where you intend to install the water heater. Please ensure:

• Yourwaterheaterwillhaveenoughcombustibleairandproperventilation.

• Locateyourheaterwherewaterleakagewillnotdamagesurroundingareas.(Pleasereferto

p. 8.)

4. Check the rating plate for the correct GAS TYPE, GAS PRESSURE, WATER PRESSURE and ELECTRIC

RATING.

*If this unit does not match your requirements, do not install and consult with the manufacturer.

5. If any problem should occur, turn off all hot water taps and turn off the gas. Then call a trained

technician or the Gas Company or the manufacturer.

WARNING

Indicates an imminently hazardous situation which, if not avoided, could result

in death or serious injury.

CAUTION

Indicates an imminently hazardous situation which, if not avoided, could result

in minor or moderate injury.

Safety Guidelines

Installaon Manual

Indicates an imminently hazardous situation which, if not avoided, will result in

death or serious injury.

DANGER

WARNING

• Watertemperaturesover125°F(52°C)cancausesevereburnsinstantlyor

deathfromscalding.Thewatertemperatureissetat120°F(50°C)fromthe

factory to minimize any scalding risk. Before bathing or showering always

check the water temperature.

•Do not store or use gasoline or other flammables, vapors, or liquids in the

vicinity of this appliance.

•Do not reverse the water and/or gas connections as this will damage the gas

valves and can cause severe injury or death. Follow the diagram on p. 27

when installing your water heater.

•Do not use this appliance if any part has been in contact with or been

immersed in water. Immediately call a licensed plumber, a licensed gas

fitter, or a professional service technician to inspect and/or service the unit if

necessary.

•Do not disconnect the electrical supply if the ambient temperature will drop

below freezing. The Freeze Protection System only works if the unit has

electrical power. The warranty will not be covered if the heat exchanger

is damaged due to freezing. Refer to the section on the Freeze Protection

Systemonp.48formoreinformation.

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INSTALLATION

GENERAL

1. Follow all local codes, or in the absence of local codes, follow the most recent edition of the National

FuelGasCode:ANSIZ223.1/NFPA54intheUSAorCAN/CSAB149.1NaturalGas,PropaneInstallation

Code in Canada.

2. All gas water heaters require careful and correct installation to ensure safe and efficient operation.

This manual must be followed exactly. Read the “Safety Guidelines” Section.

3. The manifold gas pressure is preset at the factory. It is computer controlled and should not need

adjustment.

4. Maintain proper space for servicing. Install the unit so that it can be connected or removed easily.

Refertothe"Clearances"Sectiononp.9forproperclearances.

5. The water heater must be installed in a location where the proper amount of combustible air will be

available to it at all times without obstructions.

6. The electrical connection requires a means of disconnection, to terminate power to the water heater

for servicing and safety purposes.

7. Do not install the unit where the exhaust vent is pointing into any opening in a building or where the

noise may disturb your neighbors. Make sure the vent termination meets the required distance by

local code from any doorway or opening to prevent exhaust from entering a building. (Refer to p. 22.)

8. Particles from flour, aerosols, and other contaminants may clog the air vent, build up and reduce

the functions of the rotating fan, cause improper burning of the gas, or cause damage to the water

heater. Regularly ensure that the area around the unit is dust- or debris-free. Regular maintenance is

recommended for these types of environment.

9. The240Indoor(T-H3J-DV),340Indoor(T-H3S-DV),and540Indoor(T-H3-DV)aretobeinstalled

indoors only. These units are equipped with a thermistor and hi-limit switch for the exhaust gas,

detecting excess temperatures within the flue and enabling the unit to safely stop operations if

needed. These components are always monitoring exhaust gas conditions in order to prevent heat

damage to ABS, PVC, CPVC, or polypropylene (Plastic) venting if ABS, PVC, CPVC, or polypropylene

isused.Iftheexhaustgastemperatureexceeds140°F,thesecomponentswillenabletheunitto

safely stop operations. These components are not installed on the outdoor models since the exhaust

vent is built-in.

•The Indoor model requires a 3 in. or 4 in. make-up intake air supply pipe. The intake pipe must

be sealed airtight.

•Air supply pipe can be made of ABS, PVC, CPVC, polypropylene, corrugated stainless steel, or

Categorylll/IVstainlesssteel.Regardingexhaustpipe,refertop.13and15.

•Sidewall venting is recommended for the Indoor model. Vertical venting (roof termination) is

acceptable.

•The manufacturer recommends running the exhaust vent and the intake pipe as parallel as possible.

10. The240Outdoor(T-H3J-OS),340Outdoor(T-H3S-OS),and540Outdoor(T-H3-OS)modelsonlytobe

installed outdoors and only in the area with mild, temperate climates.

The Outdoor model shall be wall-mounted or mounted on a stand. Locate the Outdoor model in an

open, unroofed area and maintain the following minimum clearances:

There is a 2 in. clearance from the left and right sides of the unit to combustible and

non-combustible surfaces.

Installaon

Installaon Manual

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INCLUDED ACCESSORIES

OPTIONAL ITEMS

•Installation and service must be performed by a qualified installer (for

example, a licensed plumber or gas fitter), otherwise the warranty will be

void.

•The installer (licensed professional) is responsible for the correct installation

of the water heater and for compliance with all national, state / provincial,

and local codes.

•The manufacturer does not recommend installing the water heater in a pit or

location where gas and water can accumulate.

•Do not have the vent terminal pointing toward any operating window, door, or

opening into a building.

•Do not install next to any source of airborne debris, such as a clothes dryer,

that can cause debris to be trapped inside the combustion chamber, unless the

system is direct-vented.

•The manufacturer does not recommend installing the water heater in an attic

due to safety issues. If you install the water heater in an attic:

•Make sure the unit will have enough combustion air and proper

ventilation.

•Keep the area around the water heater clean. When dust collects on the

flame sensor, the water heater will shut down on an error code.

•Place the unit for easy access for service and maintenance.

•A drain pan, or other means of protection against water damage, is

required to be installed under the water heater in case of leaks.

WARNING

•The warranty will not cover damage caused by water quality.

•Only potable water or potable water / glycol mixtures can be used with

this water heater. Do not introduce pool or spa water, or any chemically

treated water into the water heater.

• Waterhardnesslevelsmustnotexceed7grainspergallon(120ppm)for

single family domestic applications or more than 4 grains per gallon (70

ppm) for all other types of applications. Water hardness leads to scale

formation and may affect / damage the water heater. Hard water scaling

must be avoided or controlled by proper water treatment.

• WaterpHlevelsmustbebetween6.5and8.5

•Well water must be treated.

•Do not install the unit where water, debris, or flammable vapors may get into

the flue terminal.

•Although the water heater is designed to operate with minimal sound, the

manufacturer does not recommend installing the unit on a wall adjacent to a

bedroom, or a room that is intended for quiet study or meditation, etc.

•Locate your heater close to a drain where water leakage will not do damage

to surrounding areas. As with any water heating appliance, the potential for

leakage at some time in the life of the product does exist. The manufacturer

will not be responsible for any water damage that may occur. If you install a

drain pan under the unit, ensure that it will not restrict the combustion air flow.

CAUTION

Installaon

Installaon Manual

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9Page

Maintain all clearances around

the water heater.

CLEARANCES

Installaon

Installaon Manual

Model Top Bottom Front Back Sides

240 Indoor (T-H3J-DV)

340 Indoor (T-H3S-DV)

540Indoor(T-H3-DV)

12in.

(305mm)

12in.

(305mm)

4 in.*

(102mm)

0.5in.

(13mm)

2 in.

(51mm)

240 Outdoor (T-H3J-OS)

340 Outdoor (T-H3S-OS)

540Outdoor(T-H3-OS)

36in.

(914mm)

12in.

(305mm)

24 in.

(610mm)

0.5in.

(13mm)

2 in.

(51mm)

*24 inches recommended for maintenance.

OPTIONAL ITEMS

Back

Side

Front

Side

Top

Boom

INCLUDED ACCESSORIES

Check that these items below are included with the water heater.

Installation manual

and owner’s guide

Temperature remote controller kit*

Outdoor models only

Bird screen

Indoor models only

Communication cable

540 (T-H3) model only

Qty:1 Qty:1

Qty:1

*Refertop.31.

Qty: 2

#Model

240

Indoor

(T-H3J-DV)

240

Outdoor

(T-H3J-OS)

340

Indoor

(T-H3S-DV)

340

Outdoor

(T-H3S-OS)

540

Indoor

(T-H3-DV)

540

Outdoor

(T-H3-OS)

1. Temperature remote

controller ✓✓✓✓✓✓

2. Pipe cover ✓✓✓✓✓✓

3. Neutralizer kit ✓✓✓✓✓✓

Sidewall vent

terminator (Hood)

and Wall thimble ✓✓✓

5. 3" PVC concentric

termination ✓✓✓

6. Non-return valve ✓✓✓

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Installaon

Installaon Manual

3. Neutralizer kit: 9007607005 (TH-NT01)

The neutralizer assembly neutralizes the condensate (acidic water) that forms in the

secondary heat exchanger of the water heater.

It connects to the condensate drain port of the water heater by using connectors

includedwiththeneutralizerkit.(Refertop.29.)

The temperature remote controller

has two functions. It allows the

output temperature from the water

heater to be adjusted within the range

of100°Fto185°F,anditalsoworks

as a diagnostic tool that will give a

concise error code whenever there is

a problem with the unit.

1. Temperature remote controller:

9008172005 (TM-RE40)

5. 3" PVC concentric termination: 9007611005 (TH-CVPVC33)

Used when terminating direct-vent (sealed combustion)

systems,withIndoormodelsthatrequirea3in.(76mm)intake

anda3in.(76mm)exhaust.

The pipe cover protects the plumbing pipes to

the water heater from unexpected adjustments.

This pipe cover is fixed to the bottom of the water

heater, which hides the plumbing and improves

the visual aspects of the whole installation for

the water heater.

2. Pipe cover: 9008331005 (TH-PC03)

4. Sidewall vent terminator (Hood) and Wall thimble:

They are used when venting out through the wall. These terminations are special stainless steel vents

for gas appliances and are UL listed as Category II, III and IV. For different wall thicknesses, there

are two ranges of lengths available. (Refer to the NovaVent brochure for details.) Install these vent

terminations in accordance with their installation instructions and any applicable local codes.

Covering wall thicknesses Part#

Terminator Hood 9007999005

Wall Thimble 4 - 7 in. 9008345005

WallThimble5-10in. 9008346005

Termination + Thimble 4 - 7 in. 9008004005

Termination+Thimble5-10in. 9008005005

Wall Thimble

Terminator Hood

6. Non-return valve: 9008847005

It is a must-have item for common venting system. It prevents

the escape of combustion gas through non-operating appliances.

(Refertop.20and21.)

The temperature options are 100 °F, 105 °F, 110

°F,115°F,120°F,125°F,130°F,135°F,140°F,145

°F,150°F,155°F,160°F165°F,175°Fand185°F.

See the Troubleshooting Section for information on

possible error codes.

This concentric termination provides the convenience of only having to make one penetration through a

sidewall instead of two separate penetrations for the intake and exhaust piping. The termination includes

a bird screen, restricting small animals, pests, and foreign objects from entering into the vent system.

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