Submittal Sheet

© June 2017 A. O. Smith Corporation. All Rights Reserved
www.hotwater.com | 800-527-1953 Toll-Free USA
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AOSRG47103
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. male NPT water and gas connections. The inlet gas supply pressures shall be 4.0 in. WC (min.)
up to 10.5 in. WC (max) for NG and 8.0 in. WC (min.) up to 14 in. WC (max.) for LP. The heater shall incorporate an integrated
temperature controller that will provide diagnostic information, fault history, and heater set temperature. The heater shall operate
using 120 V / 60 Hz power source. The heater will incorporate a factory installed power cord.
The indoor heater shall be vented with a 3”/5” direct vent APNC35 concentric vent with a length not to exceed 43 ft. (equivalent),
terminating horizontally or vertically with no more than four 87° elbows.
The water heater shall use a commercial grade copper alloy, fin tube heat exchanger with quick release brass or bronze
waterways. The heater shall be controlled by an onboard solid-state printed circuit board which uses the following factory installed
components: thermistors to monitor water temperature; a flow sensor to measure flow rate; a flame sensor to monitor combustion;
and an air-fuel ratio rod to measure and adjust air input in order to maintain optimal combustion efficiency. The heater also
consists of inline fusing and surge absorbers for electrical surge protection, an electronic spark igniter, aluminized stainless steel
burners, hi-limit switch to monitor water temperature, modulating gas valve, overheat cutoff fuse, and dual freeze protection that
incorporates heating blocks and the ability to automatically fire the heater to protect the heat exchanger.
The heater can manifold to Easy-Link up to 4 heaters to provide additional capacity. The Easy-Link controls shall be built onto the
onboard solid-state printed circuit board and does not require external controls. The linking control wire shall be supplied with the
heater. A Multi-Unit controller, 100112691, can manifold 5-20 heaters. The Easy-Link and Multi-Unit Controller shall modulate the
system for the most efficient performance. The Easy-Link and Multi-Unit Controller shall rotate the priority heater every 12 hours of
operation time or 100 starts for balanced duty/cycle operation.
The heater models are design certified by CSA according to ANSI Z21.10.3, approved for sale in the United States, meets the
energy efficiency requirements of the U. S. Department of Energy and ASHRAE 90.1, complies with SCAQMD Rule 1146.2 and
other air quality districts with similar requirements for low NOx emissions of 14 ng/J or 20 ppm, and shall be certified to NSF 5
Standards.
For Technical Information, call 800-527-1953. A. O. Smith Corporation reserves the right to make product changes or improvements without prior notice.
COMMERCIAL-GRADE
RESIDENTIAL GAS WATER HEATERS