Specification Sheet

ManualsBrandsAO Smith ManualsResidential Tankless Water HeatersAO Smith 199000 BTU Whole House Dual-Fuel Tankless Water Heater

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

FEATURES:

CONCENTRIC VENT DESIGN

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 MODELS ONLY

ATI-510C 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

• Direct vent APNC35 concentric vent

system

• Vertical or Horizontal Vent Termination

Installation

• 43’ Max Length, 4 Elbows max

(87° elbows = 5’ equivalent length)

• Power Direct Vent

• Electronic Ignition - No Pilot Light

OPTIONAL ACCESSORIES

• Isolation Valve Kit

• Remote Control

• Product Preserver

• Multi-Unit Controller (510C model only)

WARRANTY

• 15-year limited warranty on heat

exchanger in residential applications

• 5-year limited warranty on heat

exchanger in commercial applications

• 5-year limited warranty on all parts

Page 1 of 4

AOSRG47103

INDOOR MODELS

ATI-110C, ATI-310C, ATI-510C

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

power vented ﬂue. Supplies hot water to domestic hot water systems (directly or

indirectly) and can be used with water storage tanks, recirculation systems, and/or

combined domestic & heating applications.

(510C models only)

ANSI Z21.10.3

COMMERCIAL-GRADE

RESIDENTIAL GAS WATER HEATERS

NON-CONDENSING CONCENTRIC VENT

COMMERCIAL-GRADE RESIDENTIAL

Summary of content (4 pages)

PAGE 1
COMMERCIAL-GRADE RESIDENTIAL GAS WATER HEATERS NON-CONDENSING CONCENTRIC VENT COMMERCIAL-GRADE RESIDENTIAL Fully modulating, gas fired, tankless water heater with sealed combustion and power vented flue. Supplies hot water to domestic hot water systems (directly or indirectly) and can be used with water storage tanks, recirculation systems, and/or combined domestic & heating applications.
PAGE 2
5-7/1 Top view COMMERCIAL-GRADE 13-3/4” (350 mm) 10-1/2” (266.5 mm) RESIDENTIAL GAS WATER HEATERS 5-7/1 1 Type* Gas Consumption Input Inlet Gas Pressure** Minimum BTU/H Minimum Maximum in. W.C. in. W.C. Maximum BTU/H UEF Maximum GPM*** Hot/Cold Connections Dimensions in Inches Gas Connection Height Width Depth 20-1/2” (520 mm) Model Number Approx Shipping Weight (lbs) ATI-110C-N Natural 15,000 140,000 4.0 10.5 0.79 6.
PAGE 3
COMMERCIAL-GRADE RESIDENTIAL GAS WATER HEATERS 110C MODEL 310C MODEL 510C MODEL Page 3 of 4 AOSRG47103
PAGE 4
COMMERCIAL-GRADE RESIDENTIAL GAS WATER HEATERS SUGGESTED SPECIFICATIONS FOR THE ATI-510C-N The fully modulating, on-demand, non-condensing gas fired tankless water heater shall be A. O. Smith Tankless Water Heater model ATI-510C-N, 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.