A.O. Smith ATI-110-N, ATI-110-P, ATI-310-N, ATI-310-P, ATI-510-P Technical Documents

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Residential / Commercial Gas Tankless Water Heaters

Fully modulating, gas fired, tankless water heater specifically designed for residential and commercial applications. Supplies hot water to domestic hot water systems (directly or indirectly) which can be used with storage tanks, recirculation systems, hydronic heating systems, radiant floor heating systems, and/or combined domestic and heating applications.

FEATURES

CONTINUOUS MAXIMUM FLOW RATES UP TO 10.0 GPM

ENERGY STAR®QUALIFIED

AVAILABLE IN NATURAL GAS OR PROPANE (LP)

OUTDOOR MODELS INCLUDE REMOTE CONTROL AS A STANDARD FEATURE

INDOOR MODELS INCLUDE BOTH A REMOTE CONTROL AND POWER CORD AS STANDARD FEATURES

LOW NOX EMISSIONS

INDOOR MODELS

ATI-110, ATI-310, ATI-510

COMPLIES WITH LEAD FREE STANDARDS

HEAT EXCHANGER (510 MODELS) IS CONSTRUCTED OF COMMERCIALGRADE COPPER

SAFETY FEATURES:

■ Built in Freeze Protection

■ Manual Reset Hi Limit (Set at 194°F)

■ Overheat Cutoff Fuse

■ Inlet and Outlet Thermistors for Constant Temperature Monitoring

■ Flame Sensor

EASY-LINK UP TO 4 UNITS (510 MODELS):

■ With No Additional Parts or Accessories Needed

VENTING AND COMBUSTION

■ 4” Category III Vent

■ Vertical or Horizontal Installation

■ 50’ Max Length, 5 elbows max (90° elbows = 5’ equivalent length)

■ Power Vent

■ Electronic Ignition - No Pilot Light

■ 3” Combustion Air Intake (with optional kit)

OPTIONAL ACCESSORIES

■ Complete Line of Category III Venting

■ Recess Box (outdoor)

■ Pipe Cover

■ Direct Vent Conversion Kits (indoor)

■ Isolation Valve Kits

■ Backflow Preventer

■ Concentric Termination Kits

WARRANTY

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

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

■ 5-year warranty on all parts

OUTDOOR MODELS

ATO-110, ATO-310, ATO-510

510 models

ANSI Z21.10.3 CSA 4.3

A. O. Smith Corporation • 500 Tennessee Waltz Parkway • Ashland City, TN 37015 • 800-527-1953 Toll-free USA Page 1 of 4

www.hotwater.com AOSBG45201

Residential / Commercial Gas

13-3/4" (350mm)

10" (254mm)

-1/4" (56mm)

21-3/8" (544mm)

20-1/4" (520mm)

1-3/4" (45mm)1-3/4" (45mm)

1-7/8" (47mm)

COLD 3-1/8" (79mm) HOT 5-1/4" (133mm)

120V 1-3/8" (36mm) GAS 4-7/8" (124mm)

4" (101 mm)

13-3/4" (350mm)

10" (254mm)

21-3/8" (544mm)

20-1/4" (520mm)

1-3/4" (45mm)1-3/4" (45mm)

1-7/8" (47mm)

COLD 3-1/8" (79mm) HOT 5-1/4" (133mm)

120V 1-3/8" (36mm) GAS 4-7/8" (124mm)

7-7/8" (203mm)

1-5/8" (43mm)

2-1/4" (56 mm) COLD 3-7/8" (98mm) GAS

4-7/8" (124mm) HOT

" (26mm)

4-7/8" (123mm) 120V

7-3/4" (196mm)

2-1/4" (56 mm) COLD 3

-7/8" (98mm) GAS

4-7/8" (124mm) HOT

" (26mm)

" (102mm)

4-7/8" (123mm) 120V

7-3/4" (196mm)

2-1/4" (57mm)

13-3/4" (350mm)

10" (254mm)

1-3/4" (45mm) 1-3/4" (45mm)

1-3/8" (36mm)

21-3/8" (544mm)

20-1/4" (520mm)

1-7/8" (47mm)

HOT 5-1/4" (133mm)

120V 1-3/8" (36mm)

GAS 4-7/8" (124mm)

COLD 3-1/4" (84mm)

4" (101 mm)

13-3/4" (350mm)

10" (254mm)

1-3/4" (45mm)

21-3/8" (544mm)

20-1/4" (520mm)

1-7/8" (47mm)

HOT 5-1/4" (133mm)

120V 1-3/8" (36mm)

GAS 4-7/8" (124mm)

COLD 3-1/4" (84mm)

1-5/8" (43mm)

5" (128mm)

7-7/8" (203mm)

4-3/8" (113mm)

19-3/8" (493mm)

COLD 2-7/8" (71mm)

1" (26mm)

HOT 6-1/2" (164mm)

9-1/2" (241mm)

120VAC 3-7/8" (99mm)

GAS 5-1/4" (135mm)

4-3/8" (113mm)

1-5/8" (43mm)

19-3/8" (493mm)

COLD 2-7/8" (71mm)

1" (26mm)

HOT 6-1/2" (164mm)

9-1/2" (241mm)

120VAC 3-7/8" (99mm)

GAS 5-1/4" (135mm)

Tankless Water Heaters

GAS CONSUMPTION

INPUT

MODEL

NUMBER

ATI-110-N

ATI-110-P

ATO-110-N

ATO-110-P

ATI-310-N

ATI-310-P

ATO-310-N

ATO-310-P

ATI-510-N

ATI-510-P

ATO-510-N

ATO-510-P

15-150 psi water pressure. 40 psi or above recommended for maximum flow. *Category III Required **Current numbers based on factory testing, 0.5 GPM required for activation, 0.4 GPM required for continuous fire after initial ignition. Pressure only relief valve required (Min. 200,000 BTUs. 150 PSI).

FUEL TYPE

Natural 19,500 140,000 0.82 5.0 10.5 6.6 20 1/4 13 3/4 7 3/4 120 0.61 4” O.D. 3” O.D. 3/4” NPT 38

Propane 19,500 140,000 0.82 8.0 14.0 6.6 20 1/4 13 3/4 7 3/4 120 0.61 4” O.D. 3” O.D. 3/4” NPT 38

Natural 19,500 140,000 0.82 5.0 10.5 6.6 20 1/4 13 3/4 7 3/4 120 0.61 N/A N/A 3/4” NPT 38

Propane 19,500 140,000 0.82 8.0 14.0 6.6 20 1/4 13 3/4 7 3/4 120 0.61 N/A N/A 3/4” NPT 38

Natural 11,000 190,000 0.82 5.0 10.5 8.0 20 1/4 13 3/4 9 1/2 120 0.73 4” O.D. 3” O.D. 3/4” NPT 43

Propane 11,000 190,000 0.82 8.0 14.0 8.0 20 1/4 13 3/4 9 1/2 120 0.73 4” O.D. 3” O.D. 3/4” NPT 43

Natural 11,000 190,000 0.82 5.0 10.5 8.0 20 1/4 13 3/4 9 1/2 120 0.73 N/A N/A 3/4” NPT 43

Propane 11,000 190,000 0.82 8.0 14.0 8.0 20 1/4 13 3/4 9 1/2 120 0.73 N/A N/A 3/4” NPT 43

Natural 11,000 199,000 0.82 5.0 10.5 10.0 20 1/4 13 3/4 9 1/2 120 0.75 4” O.D. 3” O.D. 3/4” NPT 45

Propane 11,000 199,000 0.82 8.0 14.0 10.0 20 1/4 13 3/4 9 1/2 120 0.75 4” O.D. 3” O.D. 3/4” NPT 45

Natural 11,000 199,000 0.82 5.0 10.5 10.0 20 1/4 13 3/4 9 1/2 120 0.75 N/A N/A 3/4” NPT 45

Propane 11,000 199,000 0.82 8.0 14.0 10.0 20 1/4 13 3/4 9 1/2 120 0.75 N/A N/A 3/4” NPT 45

MIN.

BTU/H

MAX.

BTU/H

ENERGY

FACTOR

ATI-110 INDOOR DIMENSIONS

CLEARANCES: Top 12”, Bottom 12”, Front 4”, Back 1”, Sides 2”

INLET GAS PRESSURE

MIN.

MAX.

W.C.

MAX

HEIGHT WIDTH DEPTH

GPM**

DIMENSIONS

(INCHES)

VOLT AMP FLUE*

ATO-110 OUTDOOR DIMENSIONS

CLEARANCES: Top 36”, Bottom 12”, Front 24”, Back 1”, Sides 2”

INTAKE

(OPTIONAL)

HOT/COLD

GAS CONN.

APPROX.

SHIPPING

WEIGHT

(LBS)

ATI-310 and ATI-510 INDOOR DIMENSIONS

CLEARANCES: Top 12”, Bottom 12”, Front 4”, Back 1”, Sides 2”

www.hotwater.com AOSBG45201

ATO-310 and ATO-510 OUTDOOR DIMENSIONS

CLEARANCES: Top 36”, Bottom 12”, Front 24”, Back 1”, Sides 2”

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