Takagi T-H3S-DV - User Manual

Gas Tankless Water Heater
TM
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)

Takagi T-H3S-DV Specifications

General

Brand	Takagi
Model	T-H3S-DV
Category	Water Heater
Language	English

Summary

Models

WARNING

Critical safety warning about following instructions to prevent fire/explosion and injury/death.

CONGRATULATIONS

SPECIFICATIONS

INTRODUCTION

SAFETY GUIDELINES

SAFETY DEFINITION

Defines DANGER, WARNING, and CAUTION symbols used in the manual.

GENERAL

Covers general safety rules, codes, and warnings related to water heater operation and handling.

INSTALLATION

GENERAL

Covers installation requirements, clearances, air supply, and venting for indoor/outdoor models.

CLEARANCES

INCLUDED ACCESSORIES

Lists accessories that should be included with the water heater package.

OPTIONAL ITEMS

Lists optional accessories available for purchase that enhance the water heater's functionality.

WARNING FOR INSTALLATIONS

HIGH-ALTITUDE INSTALLATIONS

VENTING INSTRUCTIONS

General rules for venting water heaters

Outlines general guidelines for connecting and positioning the water heater vent system.

General rules for vent terminations

Provides guidelines for selecting appropriate locations for vent terminations to ensure safety and performance.

-Exhaust vent (ABS, PVC, CPVC, or polypropylene vent)-

-Two-pipe, direct-vent illustrations-

-Single pipe with room-air intake illustrations-

-Exhaust vent (Stainless steel vent)-

-Direct-vent and single vent Illustrations-

-Common-venting system-

Common-venting system DIPswitch settings

-Vent termination clearances-

-For sidewall terminations-

-For rooftop terminations-

GAS SUPPLY AND GAS PIPE SIZING

Gas connections

Details procedures for installing gas shutoff valves and performing leak tests.

WATERCONNECTIONS

-Measuring inlet gas pressure-

Instructions for licensed professionals to measure inlet gas pressure.

-Pressure relief valve-

CONDENSATE DRAIN

Explains how to connect the condensate drain and the need for neutralization.

-Condensate Drain Connections-

ELECTRICAL CONNECTIONS

TEMPERATURE REMOTE CONTROLLER

-INSTALLATION-

Provides installation instructions and warnings for the remote controller.

<Mounting and Wiring the Remote Controller>

Step-by-step guide for mounting and wiring the remote controller.

EASY-LINK SYSTEM

-General-

Details Easy-Link System capabilities, limitations, and allowable models.

-Easy-Link Connection Procedures-

Provides steps for connecting units in an Easy-Link System.

MULTI-UNIT SYSTEM

APPLICATIONS

-Space-Heating Applications-

Outlines requirements for space heating, including air vents and chemicals.

-Recirculation-

Details the setup and requirements for a recirculation pump system.

-Dual-purpose hot water heating- (Domestic and Space Heating):

INITIAL OPERATION

OPERATING SAFETY

NORMAL OPERATION

TEMPERATURE CONTROLLER and REMOTE CONTROLLER

Describes the functions and displays of the temperature and remote controllers.

TEMPERATURE SETTINGS

ADDITIONAL FEATURES

TEMPERATURE SETTINGS ON THE PCB (WITHOUT REMOTE CONTROLLER)

FLOW

FREEZE PROTECTION SYSTEM

MAINTENANCE AND SERVICE

UNIT DRAINING and FILTER CLEANING

Step-by-step guide for draining the unit and cleaning the cold-water inlet filter.

TROUBLESHOOTING

GENERAL

Lists common problems related to hot water temperature and availability, with solutions.

WATER HEATER

Temperature controller and Remote controller

EASY-LINK SYSTEM

ERROR CODES

Single unit Installations

Troubleshooting for single units, including error code display.

Easy-Link System

Troubleshooting specific to Easy-Link systems, including unit numbering and error codes.

COMPONENTS DIAGRAM

PARTS LIST

OUTPUT TEMPERATURE CHART

LIMITED WARRANTY

Damages due to water quality:

Lists conditions related to water quality not covered by the warranty.