A.O. Smith ATI-340H-N Service Manual download pdf

Residential/Commercial Gas

Tankless Water Heaters

FEATURES

ULTRA-LOW NOx CONDENSING TECHNOLOGY PROVIDES UNPRECEDENTED

0.95 ENERGY FACTOR

DURABLE HEAT EXCHANGER

■ Primary Heat Exchanger is constructed of HRS35, a Commercial-Grade Copper that is more

resilient to erosion. HRS35 is 25x better at heat transfer than stainless steel thus stabilizing

outgoing water temperatures quicker

■ Secondary Heat Exchanger is made of Type 316L Stainless Steel to protect against corrosion

CONTINUOUS MAXIMUM FLOW RATES UP TO 10.0 GPM

ENERGY STAR

QUALIFIED

AVAILABLE IN NATURAL GAS OR PROPANE (LP)

ATI 540H & AT0 540H CAN BE USED IN BOTH RESIDENTIAL AND

COMMERCIAL APPLICATIONS

ELECTRONIC IGNITION -

NO PILOT LIGHT

INDOOR MODEL - INCLUDES A BUILT-IN TEMPERATURE CONTROLLER AND

ADVANCED DIAGNOSTICS TO SIMPLIFY TROUBLESHOOTING

OUTDOOR MODEL - INCLUDES A WALL MOUNT TEMPERATURE REMOTE

CONTROLLER AND ADVANCED DIAGNOSTICS TO SIMPLIFY TROUBLESHOOTING

FACTORY-INSTALLED POWER CORD INCLUDED FOR INDOOR MODELS

EASY-LINK UP TO 4 UNITS (540H MODELS ONLY)

■ With no additional parts or accessories needed

MULTI-LINK UP TO 20 UNITS (540H MODELS ONLY)

COMPLIES WITH LEAD FREE STANDARDS

SAFETY FEATURES:

■ Air-Fuel Ratio (AFR) Sensor

■ Exhaust & Water Temperature Safety Control

■ Overheat Cut-Off Fuse

INTERNAL FREEZE PROTECTION SYSTEM

POWER DIRECT VENT DESIGN

■ Exhaust, 3" PVC Venting up to 70 Feet or 4" PVC Venting up to 100 Feet

■ Provides flexible venting with PVC, CPVC, or ABS Pipe for Intake and Exhaust (solid core

only). Canadian Installations Require ULCS636 Listed PVC or CPVC Pipe for Venting.

■ Category IV Stainless Steel venting can also be use

ACCESSORIES

■ Pipe Cover

■ Neutralizer Kit

■ Isolation Valve Kits

■ Concentric Termination

WARRANTY

■ 15-year limited warranty on heat exchanger in residential applications

■ 10-year limited warranty on heat exchanger in commercial applications

■ 5-year limited warranty on all parts

INDOOR MODELS

ATI-240H, ATI-340H, ATI-540H

OUTDOOR MODELS

ATO-240H, ATO-340H, ATO-540H

ANSI Z21.10.3 CSA 4.3

Page1of6

AOSRG46835

TANKLESS HIGH EFFICIENCY

CONDENSING MODELS

540 model

only

Revised March 2013

1 2 3 4 5 6

Summary of Contents

Page 1 - CONDENSING MODELS

Residential/Commercial GasTankless Water HeatersFEATURESULTRA-LOW NOx CONDENSING TECHNOLOGY PROVIDES UNPRECEDENTED0.95 ENERGY FACTORDURABLE HEAT EXCHA

Page 2

Residential/Commercial GasTankless Water HeatersPage 2 of 6AOSRG46835For Technical Information call 1-877-737-2840. A. O. Smith Corporation reserves t

Page 3

Residential/Commercial GasTankless Water HeatersPage3of6AOSRG46835ForTechnical Informationcall1-877-737-2840. A.O.Smith Corporationreservesthe right t

Page 4

Page 4 of 6AOSRG46835ForTechnical Informationcall1-877-737-2840. A.O.Smith Corporationreservesthe right to make product changes orimprovements without

Page 5 - FLOW RATE vs TEMPERATURE RISE

Residential/Commercial GasTankless Water HeatersPage 5 of 6AOSRG46835ForTechnical Informationcall1-877-737-2840. A.O.Smith Corporationreservesthe righ

Page 6 - PRESSURE LOSS

PRESSURE LOSSResidential/Commercial GasTankless Water HeatersPage 6 of 6www.hotwater.com AOSRG46835For Technical Information call 1-877-737-2840. A. O

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