A.O. Smith ATI-540H-N, ATI-540H-P, ATO-540H-N, ATO-540H-P Technical Documents

Residential / Light Commercial Gas Tankless Water Heaters

TANKLESS HIGH-EFFICIENCY CONDENSING MODELS

FEATURES

■ Condensing technology provides signiﬁcant energy cost savings

PRIMARY HEAT EXCHANGER IS CONSTRUCTED OF HRS35 COMMERCIAL

GRADE COPPER

■ Stronger than standard copper and more resilient against erosion

SECONDARY HEAT EXCHANGER IS MADE OF TYPE 316L STAINLESS STEEL

■ Provides additional protection against corrosion

CONTINUOUS MAXIMUM FLOW RATES UP TO 9.0 GPM

CAN BE USED IN RESIDENTIAL AND LIGHT COMMERCIAL APPLICATIONS

ENERGY STAR

QUALIFIED

MODELS INCLUDE REMOTE CONTROL AND POWER CORD

EASY-LINK UP TO 4 UNITS

■ With no additional parts or accessories needed

ELECTRONIC IGNITION-NO PILOT LIGHT

BUILT-IN DISPLAY SHOWS OPERATING TEMPERATURE ALONG WITH DIAGNOSTIC ERROR CODES

SAFETY FEATURES

■ Air-Fuel Ratio (AFR) Sensor

■ Exhaust & Water Temperature Safety Controls

■ Overheat Cutoff Fuse

INTERNAL FREEZE PROTECTION SYSTEM

POWER DIRECT VENT DESIGN

■ 4” Pipe Vents up to 50 Equivalent Feet or 3” Pipe Vents up to 25 Equivalent Feet

■ ULC s636 approved PVC, CPVC, or Polypropylene Pipe for Intake and Exhaust

(solid core only)

■ Category III Stainless Steel venting can also be used

■ Vertical or Horizontal installation

ACCESSORIES

■ Remote Temperature Controller (Included)

■ Neutralizer Kit

■ Plumbing Installation Kits

■ PVC Intake Adaptor

■ Concentric Termination

ATI-520H-N

ATI-520H-P

ANSI Z21.10.3 CSA 4.3

WARRANTY

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

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

■ 5-year warranty on all parts

October 2012

CANRG46805

Page 1 of 2

INDOOR CONDENSING MODELS

18-1/2" (470mm)

FlowRate(gpm)

Head Feet

SetTemperature: 130

F&Higher

CAPACITY & DIMENSIONS

Residential / Light Commercial Gas Tankless Water Heaters

MODEL

ATI 520H N NATURAL 13,000 199,000 5.0 10.5 .91 3/4” NPT 25-3/5 18-1/2 12-2/5 73

ATI 520H P PROPANE 13,000 199,000 8.0 14.0 .91 3/4” NPT 25-3/5 18-1/2 12-2/5 73

All dimensions in inches. 15-150 psi Water Pressure. 40 psi or above recommended for maximum ﬂow.

FUEL TYPE

GAS CONSUMPTION INPUT INLET GAS PRESSURE

MINIMUM

BTU/H

6-1/4" (161.5mm)

1/2" (12.5mm)

GAS 6" (153.6mm)

HOT 7-1/4" (182.1mm)

120VAC 8-1/2" (216.3mm)

COLD 8-5/8" (220.6mm)

10-1/2"(266.8mm)

Condensate DrainPort

MAXIMUM

BTU/H

12-1/2"(316mm)

25-1/2"(649mm)

MINIMUM

W.C.

Male Ø4"(100.8mm)

6-5/8" (168.4mm)

MAXIMUM

W.C.

120VAC 2-1/4" (58.2mm)

HOT5-5/8" (142.2mm)

ENERGY FACTOR

2-3/4" (69.1mm) INTAKE

HOT/COLD

GAS CONN.

12-1/2" (320mm)

DIMENSIONS IN INCHES

HEIGHT WIDTH DEPTH

3-1/2" (90mm)

Ø4"(102mm) Female

3/4" (18.8mm)

29-1/2" (751mm)

2-3/4" (71.8mm) EXHAUST

1-1/4" (29.2mm) COLD

4-5/8" (116.8mm) GAS

6-1/4" (159.1mm)

Condensate DrainPort

APPROX.

SHIPPING

CLEARANCES: Top: 12”; Bottom: 12”; Front: 4”; Back: .05”; Sides:3”

WEIGHT

(LBS)

Flow Rate vs. Temperature Rise

10.0

9.0

8.0

7.0

6.0

5.0

4.0

3.0

2.0

1.0

0.0

020406080100 120

TemperatureRise (°F)

140

Pressure Loss

PressureLoss (psi)

0.01.0 2.03.0 4.05.0 6.07.0 8.09.0 10.0

Flow Rate (gpm)

120

100

SetTemperature : 125°F&lower

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

October 2012

www.hotwatercanada.ca

Page 2 of 2

CANRG46805