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

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Residential Gas Tankless Water Heaters

TANKLESS RESIDENTIAL MODELS

Fully modulating, gas fired, tankless water heater convertible to sealed combustion with power-vented flue. Supplies hot water to domestic hot water systems (directly or indirectly).

FEATURES

CONTINUOUS MAXIMUM FLOW RATES UP TO 6.6 GPM

ENERGY STAR

AVAILABLE FOR NATURAL GAS OR PROPANE

MODELS INCLUDE REMOTE CONTROL AND POWER CORD AS STANDARD FEATURES

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 Flue Backdraft Pressure Switch GFI Power Supply Connection Flame Sensor

QUALIFIED

ATI-110-N

ATI-110-P

VENTING AND COMBUSTION

4” Category III Stainless Steel 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 Stainless Steel Venting Pipe Cover Direct Vent Conversion Kit Isolation Valve Kits

Concentric Vent Kits Isolation Valve Kit (includes Pressure Relief Valve)

WARRANTY

15-year limited warranty on heat exchanger in residential applications 5-year warranty on all parts

ANSI Z21.10.3

CSA 4.3

May 2013

Page 1 of 2

CANRG46815

Residential Gas Tankless Water Heaters

TANKLESS RESIDENTIAL MODELS

GAS

CONSUMPTION

INPUT

MODEL

NUMBER

FUEL TYPE

MIN.

BTU/H

MAX.

BTU/H

ATI-110-N Natural 19,500 140,000

ATI-110-P Propane 19,500 140,000

INLET GAS

ENERGY

FACTOR

(EF)

PRESSURE

MIN.

W.C.

MAX.

W.C.

MAX

GPM**

0.82 5.0 10.5 6.6 20-1/4 13-3/4 7-3/4 120 0.61 4” O.D. 3.0” O.D. 3/4” NPT 38

0.83 8.0 14.0 6.6 20-1/4 13-3/4 7-3/4 120 0.61 4” O.D. 3.0” O.D. 3/4” NPT 38

DIMENSIONS

IN INCHES

HEIGHT WIDTH DEPTH

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

Pressure Loss

Pressure

Loss (psi)

Head

Feet

Flow Rate (GPM)

0 20 40 60 80 100 120 140

HOT/

COLD/

VOLT AMP FLUE*

Comparison of Flow Rates vs. Temperature Rise

(OPTIONAL)

Temperature Rise (°F)

INTAKE

GAS

CONN.

APPROX.

SHIPPING

WEIGHT

(LBS)

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

DIMENSIONS

4" (102mm)

2-1/4" (57mm)

1" (26mm)

2-1/4" (56 mm) COLD

3-7/8" (98mm) GAS 4-7/8" (123mm) 120V 4-7/8" (124mm) HOT 7-3/4" (196mm)

1-3/4"(45mm)

21-3/8" (544mm)

1-7/8" (47mm)

COLD 3-1/8" (79mm) HO T5-1/4" (133mm)

20-1/4" (520mm)

13-3/4" (350mm)

10" (254mm)

For Technical Information call 1-888-479-8324. A. O.Smith Corporation reserves the right to make product changes or improvements without prior notice.

Ø 3-9/8" (101 mm)

1-3/4" (45mm)

2-1/4" (56mm)

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

May 2013 Page 2 of 2

www.hotwatercanada.ca CANRG46815