A.O. Smith ATI-340H-N Technical Documents

Brand: A.O. Smith

Model: ATI-340H-N

Type: Technical Documents

A.O. Smith ATI-340H-N gas tankless water heater quickly and efficiently provides you with an endless supply of hot water. This ENERGY STAR® qualified water heater has a 0.95 energy factor and is capable of delivering a continuous maximum flow rate of up to 8.0 GPM. The durable heat exchanger is constructed of commercial-grade copper that is more resilient to erosion and is 25x better at heat transfer than stainless steel, making this water heater a great choice for residential and commercial applications.

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

Residential/Commercial Gas

Tankless Water Heaters

Page 2 of 6

AOSRG46835

For Technical Information call 1-877-737-2840. A. O. Smith Corporation reserves the right to mak e product changes or improvements without prior notice.

TANKLESS HIGH EFFICIENCY CONDENSING MODELS

All dimensions are in inches.

15-150 psi Water Pressure. 40 psi or above is recommended for maximum flow.

*Current numbers based on factory testing; 0.4 GPM required for continuous fire after initial ignition.

Indoor models are certified from sea level to 10,100 ft. elevati

ons.

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

NUMBER

FUEL

TYPE

GAS CONSUMPTION

INPUT

INLET GAS

PRESSURE

ENERGY

FACTOR

MAX

GPM*

HOT/COLD

AND

GAS CONN.

DIMENSIONS IN INCHES

UNIT

WEIGHT

(LBS)

MINIMUM

BTU/H

MAXIMUM

BTU/H

MINIMUM

W.C.

MAXIMUM

W.C.

HEIGHT

WIDTH

DEPTH

INDOOR

ATI-240H-N Natural 15,000 160,000 5.0 10.5 0.95 6.6 3/4” NPT 23-5/8 17-3/4 11-1/4 58

ATI-240H-P Propane 13,000 160,000 8.0 14.0 0.95 6.6 3/4” NPT 23-5/8 17-3/4 11-1/4 58

ATI-340H-N Natural 15,000 180,000 5.0 10.5 0.95 8.0 3/4"NPT 23-5/8 17-3/4 11-1/4 58

ATI-340H-P Propane 13,000 180,000 8.0 14.0 0.95 8.0 3/4"NPT 23-5/8 17-3/4 11-1/4 58

ATI-540H-N Natural 15,000 199,000 5.0 10.5 0.95 10.0 3/4"NPT 23-5/8 17-3/4 11-1/4 59

ATI-540H-P Propane 13,000 199,000 8.0 14.0 0

.95 10.0 3/4"NPT 23-5/8 17-3/4 11-1/4 59

OUTDOOR

ATO-240H-N Natural 15,000 160,000 5.0 10.5 0.95 6.6 3/4” NPT 23-5/8 17-3/4 11-1/4 58

ATO-240H-P Propane 13,000 160,000 8.0 14.0 0.95 6.6 3/4” NPT 23-5/8 17-3/4 11-1/4 58

ATO-340H-N Natural 15,000 180,000 5.0 10.5 0.95 8.0 3/4"NPT 23-5/8 17-3/4 11-1/4 58

ATO-340H-P Propane 13,000 180,000 8.0 14.0 0.95 8.0 3/4"NPT 23-5/8 17-3/4 11-1/4 58

ATO-540H-N Natural 15,000 199,000 5.0 10.5 0.95 10.0 3/4"NPT 23-5/8 17-3/4 11-1/4 59

ATO-540H-P Propane 13,000 199,000 8.0 14.0

0.95 10.0 3/4"NPT 23-5/8 17-3/4 11-1/4 59

Residential/Commercial Gas

Tankless Water Heaters

Page3of6

AOSRG46835

ForTechnical Informationcall1-877-737-2840. A.O.Smith Corporationreservesthe right to make product changes orimprovements without priornotice.

7-7/8" (199 mm)

GAS 5-1/8" (131 mm)

COLD 6-3/4" (172 mm)

HOT 5-1/2" (140 mm)

7-1/2" (189 mm)

GAS 5-7/8" (147 mm)

Condensate drain port

COLD 5/8" (17 mm)

HOT 4-3/4" (120 mm)

17-5/8" (448 mm)

6-1/4" (159 mm)

5-3/4" (147 mm)

120 VAC 3" (77 mm)

120 VAC 6-7/8" (174 mm)

Drain port

Female

10-3/4" (272mm)

22-1/2" (570 mm)

Condensate drain port

4" (102 mm)

2-5/8" (68 mm)

Exhaust

Intake

Female

7-7/8" (199 mm)

7-1/2" (189 mm)

7" (180 mm)

4" (101 mm)

17-3/4" (450 mm)

HOT 4-3/4" (120 mm)

6-3/4" (170 mm)

COLD 5/8" (17 mm)

GAS 5-3/4" (147 mm)

Condensate drain port

23-5/8" (600 mm)

2-5/8" (65 mm)

5-3/4" (147 mm)

11-1/4" (285 mm)

1/2 (13 mm)

GAS 5-1/8" (131 mm)

HOT 5-1/2" (140 mm)

COLD 6-3/4" (172 mm)

Condensate drain port

6-1/4" (159mm)

4" (102 mm)

24-7/8" (631 mm)

120 VAC 3" (77 mm)

Drain port 6" (152 mm)

120 VAC 6-7/8" (174 mm)

INDOOR MODEL

Page 4 of 6

AOSRG46835

ForTechnical Informationcall1-877-737-2840. A.O.Smith Corporationreservesthe right to make product changes orimprovements without priornotice.

17-5/8" (448 mm)

6-1/4" (159 mm)

COLD 5/8" (17 mm)

120 VAC 3" (77 mm)

HOT 5-1/2" (140 mm)

HOT 4-3/4" (120 mm)

7-1/2" (189 mm)

Condensate drain port

GAS 5-1/8" (131 mm)

COLD 6-3/4" (172 mm)

7-7/8" (199 mm)

Drain port

7-1/2" (189 mm)

10-3/4" (272 mm)

22-1/2" (570 mm)

120 VAC

Condensate drain port

7-7/8" (199 mm)

Condensate drain port

11" (281 mm)

1/2" (13 mm)

120 VAC 3" (77 mm)

GAS (131 mm)

HOT (140 mm)

COLD 6-3/4" (172 mm)

Condensate drain port

COLD 5/8" (17 mm)

GAS 5-3/4" (147 mm)

HOT 4-3/4" (120 mm)

6-3/4" (170 mm)

1-1/2" (37 mm)

11-1/4" (285 mm)

120 VAC 6-1/4" (159 mm)

17-3/4" (450 mm)

7" (180 mm)

23-5/8" (600 mm)

24-7/8" (631 mm)

3-5/8" (92 mm)

4-1/2" (114 mm)

Drain port 6" (152 mm)

Residential/Commercial Gas

Tankless Water Heaters

OUTDOOR MODEL

Residential/Commercial Gas

Tankless Water Heaters

Page 5 of 6

AOSRG46835

ForTechnical Informationcall1-877-737-2840. A.O.Smith Corporationreservesthe right to make product changes orimprovements without priornotice.

FLOW RATE vs TEMPERATURE RISE

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

0 20406080100120140

Flow Rate (GPM)

Temperature Rise (˚F)

Set temperature 125˚F (52˚C) or lower

Set temperature 130˚F (55˚C) or

higher

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

0 20406080100

Flow Rate (GPM)

540H

240H

340H

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

11.0

0 20406080100

Flow Rate (GPM)

Flow Rate vs. Temperature Rise Flow Rate vs. Temperature Rise

Temperature Rise (°F)

Flow Rate vs. Temperature Rise

Temperature Rise (°F)

PRESSURE LOSS

Residential/Commercial Gas

Tankless Water Heaters

Page 6 of 6

www.hotwater.com AOSRG46835

For Technical Information call 1-877-737-2840. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.

ϮϬ

ϰϬ

ϲϬ

ϴϬ

ϭϬϬ

ϭϮϬ

ϭϬ

ϭϱ

ϮϬ

Ϯϱ

ϯϬ

ϯϱ

ϰϬ

ϰϱ

ϱϬ

          

WƌĞƐƐƵƌĞ >ŽƐƐ ;ƉƐŝͿ

,ĞĂĚ ;&ĞĞƚͿ

ϮϬ

ϰϬ

ϲϬ

ϴϬ

ϭϬϬ

ϭϮϬ

ϭϬ

ϭϱ

ϮϬ

Ϯϱ

ϯϬ

ϯϱ

ϰϬ

ϰϱ

ϱϬ

          

,ĞĂĚ ;&ĞĞƚͿ

WƌĞƐƐƵƌĞ >ŽƐƐ ;ƉƐŝͿ

+

+





































            

,ĞĂĚ ;&ĞĞƚͿ

WƌĞƐƐƵƌĞ >ŽƐƐ ;ƉƐŝͿ

&ůŽǁƌĂƚĞ ;'WDͿ

6HWWHPSHUDWXUHÛ)Û&RU ORZHU

6HWWHPSHUDWXUHÛ)Û&RUKLJKHU

+

3UHVVXUH /RVV

)ORZ 5DWH *30

3UHVVXUH /RVV

)ORZ 5DWH *30

3UHVVXUH /RVV

)ORZ 5DWH *30

Specification

Water heater(s) shall be Model_________________ as manufactured by A. O. Smith Water Heaters, shall be a copper coil integral fin and tube construction with quick release brass or bronze waterways. Heater(s)

will be factory assembled and tested.

The heater shall be vented with 3” or 4” Schedule 40 PVC, CPVC, or ABS vent pipe, or stainless steel Category III vent pipe at a distance not to exceed 70’ (equivalent) for 3” vent or 100’ (equivalent) for 4” vent,

term

inating vertically or horizontally as prescribed. Intake air pipe may be of such material as ABS, PVC, galvanized B-Vent, corrugated aluminum or stainless steel, or Category IV stainless steel not to exceed

70’ (equivalent) for 3” vent or 100’ (equivalent) for 4” vent.

The heater(s) shall be controlled by an onboard solid-state printed circuit board monitoring incoming and outgoing temperatures with factory installed thermistors, sensing and controlling flow rate t

o set point

temperature, controlling both air and gas mixture inputs to maintain thermal combustion efficiency. The heater(s) shall also consist of inline fusing, a spark ignition and sensor system, aluminized stainless steel

burners, an air-fuel ratio sensor, a hi-limit temperature switch, modulating and proportional gas valves, a freeze protection sensor with ceramic heating blocks, and an overheat cutoff fuse.

The water heater(s) shall be CSA listed, exceed the