Submittal Sheet

ManualsBrandsAO Smith ManualsPlumbing Supplies190,000 BTU Non-Condensing Outdoor Tankless Water Heater (NG/LP)

Residential/Commercial Gas

Water Heaters

Page 1 of 4

AOSBG45100

www.hotwater.com | 800-527-1953 Toll-Free USA | A. O. Smith Corporation | 500 Tennessee Waltz Parkway | Ashland City, TN 37015

INDOOR MODELS

ATI-110U, ATI-310U, ATI-510U

OUTDOOR MODELS

ATO-110U, ATO-310U, ATO-510U

FEATURES:

FIELD CONVERTIBLE FROM

NATURAL GAS TO PROPANE

COMPLIES WITH SCAQMD RULE

1146.2 AND OTHER AIR QUALITY

MANAGEMENT DISTRICTS

WITH SIMILAR NOx EMISSION

REQUIREMENTS OF 14 ng/J OR 20

PPM

MAXIMUM FLOW RATES UP TO 10.0

GPM

COPPER HEAT EXCHANGER

• 25x better heat transfer than stainless steel thus

stabilizing outgoing water temperature quicker

and reducing pressure drop across the heat

exchanger

INDOOR AND OUTDOOR MODELS

AVAILABLE

OUTDOOR MODELS INCLUDE

REMOTE CONTROL AS A STANDARD

FEATURE

INDOOR MODELS INCLUDE A BUILT-

IN TEMPERATURE CONTROLLER AND

A FACTORY-INSTALLED POWER CORD

AS STANDARD FEATURES

ATI-510U AND ATO-510U CAN BE

USED IN BOTH RESIDENTIAL AND

COMMERCIAL APPLICATIONS

• Easy-Link up to 4 units (no additional parts or

accessories needed)

• Multi-link up to 20 units

COMPLIES WITH LEAD FREE

STANDARDS

SAFETY FEATURES:

• Built-in Freeze Protection

• Manual Reset Hi Limit (Up to 194°F)

• Overheat Cutoff Fuse

• Inlet and Outlet Thermistors for Constant

Temperature Monitoring

• Air Fuel Ratio Rod

• Flame Sensor

VENTING AND COMBUSTION

• 4” Category III Stainless Steel

• 3” Combustion Air Intake

• 60’ Max Length, 6 Elbows max

(90° elbows = 5’ equivalent length)

• Power Vent or Power Direct Vent

• Vertical or Horizontal Installation

• Electronic Ignition - No Pilot Light

OPTIONAL ACCESSORIES

• Complete Line of Stainless Steel Venting

• Recess Box (outdoor models)

• Pipe Cover

• Isolation Valve Kit

• Backﬂow Preventer

• Concentric Termination Kits

WARRANTY

• 15-year limited warranty on heat exchanger in

residential applications

• 6-year limited warranty on heat exchanger in

commercial applications

• 5-year limited warranty on all parts

Fully modulating, gas ﬁred, tankless water heater with sealed combustion and power

vented ﬂue. Indoor and outdoor models available for residential and commercial

applications. Supplies hot water to domestic hot water systems and can be used

with water storage tanks, recirculation systems, and/or combined domestic & heating

applications.

ULTRA LOW-NOx NON-CONDENSING

TANKLESS WATER HEATERS

(510U models only)

ANSI Z21.10.3

Summary of content (4 pages)

PAGE 1
Residential/Commercial Gas Water Heaters ULTRA LOW-NOx NON-CONDENSING TANKLESS WATER HEATERS Fully modulating, gas fired, tankless water heater with sealed combustion and power vented flue. Indoor and outdoor models available for residential and commercial applications. Supplies hot water to domestic hot water systems and can be used with water storage tanks, recirculation systems, and/or combined domestic & heating applications.
PAGE 2
Residential/Commercial Gas Water Heaters Gas Consumption Input Inlet Gas Pressure** Model Number Dimensions in Inches Energy Maximum Hot/Cold Gas Minimum Maximum Factor GPM*** Connections Connection Height Width Depth (EF) in. W.C. in. W.C. Unit Weight (lbs) Type* Minimum BTU/H Maximum BTU/H Natural Natural Natural 15,000 15,000 15,000 140,000 190,000 199,000 4.0 4.0 4.0 10.5 10.5 10.5 0.82 0.82 0.82 6.
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Residential/Commercial Gas Water Heaters 110U MODELS 310U MODELS 510U MODELS Page 3 of 4 AOSBG45100
PAGE 4
Residential/Commercial Gas Water Heaters SUGGESTED SPECIFICATIONS FOR THE ATI-510U OR ATO-510U The fully modulating, on-demand, gas fired tankless water heater shall be A. O. Smith Tankless Water Heater model ATI-510U 200 or ATO-510U 200, having a maximum input rating of 199,000 Btu/h and available in natural gas (NG). For use with propane (LP) gas, the heater shall be field converted using the factory supplied conversion kit. The conversion kit shall be supplied with the heater. The heater shall have ¾ in.