A.O. Smith ATI-540H-N Technical Documents

A.O. Smith
Brand
A.O. Smith
Model
ATI-540H-N
Type
Technical Documents

A.O. Smith ATI-540H-N is a gas tankless water heater designed for residential and light commercial applications. It utilizes condensing technology to provide significant energy cost savings, making it an efficient choice for heating water. The primary heat exchanger is constructed of durable HRS35 commercial-grade copper, ensuring strength and resistance to erosion, while the secondary heat exchanger is made of Type 316L stainless steel for added corrosion protection. With a continuous maximum flow rate of up to 9.

A.O. Smith ATI-540H-N is a gas tankless water heater designed for residential and light commercial applications. It utilizes condensing technology to provide significant energy cost savings, making it an efficient choice for heating water. The primary heat exchanger is constructed of durable HRS35 commercial-grade copper, ensuring strength and resistance to erosion, while the secondary heat exchanger is made of Type 316L stainless steel for added corrosion protection. With a continuous maximum flow rate of up to 9.

Page 1 of 2
October 2012
CANRG46805
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
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
Residential / Light Commercial
Gas Tankless Water Heaters
ATI-520H-N
ATI-520H-P
ANSI Z21.10.3 CSA 4.3
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
Page 2 of 2
www.hotwatercanada.ca
CANRG46805
Residential / Light Commercial
Gas Tankless Water Heaters
CAPACITY & DIMENSIONS
INDOOR CONDENSING MODELS
MODEL
FUEL
TYPE
GAS CONSUMPTION INPUT INLET GAS PRESSURE
ENERGY
FACTOR
HOT/COLD
GAS CONN.
DIMENSIONS IN INCHES
APPROX.
SHIPPING
WEIGHT
(LBS)
MINIMUM
BTU/H
MAXIMUM
BTU/H
MINIMUM
W.C.
MAXIMUM
W.C.
HEIGHT WIDTH DEPTH
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
25-1/2"(649mm)
12-1/2"(316mm)
6-1/4" (161.5mm)
1/2" (12.5mm)
10-1/2"(266.8mm)
120VAC 8-1/2" (216.3mm)
COLD 8-5/8" (220.6mm)
HOT 7-1/4" (182.1mm)
GAS 6" (153.6mm)
6-5/8" (168.4mm)
1-1/4" (29.2mm) COLD
29-1/2" (751mm)
3/4" (18.8mm)
Ø4"(102mm) Female
Male Ø4"(100.8mm)
4-5/8" (116.8mm) GAS
120VAC 2-1/4" (58.2mm)
2-3/4" (71.8mm) EXHAUST
2-3/4" (69.1mm) INTAKE
6-1/4" (159.1mm)
HOT5-5/8" (142.2mm)
12-1/2" (320mm)
3-1/2" (90mm)
18-1/2" (470mm)
Condensate DrainPort
Condensate DrainPort
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
020406080100 120
140
Flow Rate vs. Temperature Rise
Pressure Loss
FlowRate(gpm)
TemperatureRise (
°
F)
Flow Rate (gpm)
PressureLoss (psi)
Head Feet
SetTemperature : 125
°
F&lower
SetTemperature: 130
°
F&Higher
0
20
40
60
80
100
120
0
5
10
15
20
25
30
35
40
45
50
0.01.0 2.03.0 4.05.0 6.07.0 8.09.0 10.0
CLEARANCES: Top: 12”; Bottom: 12”; Front: 4”; Back: .05”; Sides:3”
All dimensions in inches.
15-150 psi Water Pressure. 40 psi or above recommended for maximum flow.
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A.O. Smith ATI-540H-N Technical Documents

A.O. Smith
Brand
A.O. Smith
Model
ATI-540H-N
Type
Technical Documents

A.O. Smith ATI-540H-N is a gas tankless water heater designed for residential and light commercial applications. It utilizes condensing technology to provide significant energy cost savings, making it an efficient choice for heating water. The primary heat exchanger is constructed of durable HRS35 commercial-grade copper, ensuring strength and resistance to erosion, while the secondary heat exchanger is made of Type 316L stainless steel for added corrosion protection. With a continuous maximum flow rate of up to 9.

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