Specification Sheet

Residential Gas

Water Heaters

Takagi Corporation reserves the right to make product changes or improvements without prior notice.

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TCGSS00314

SUGGESTED SPECIFICATIONS FOR THE TK-510C-NI

The fully modulating, on-demand, non-condensing gas red tankless water heater shall be Takagi Tankless

Water Heater model TK-510C-NI, 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 eld 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 5.0 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, n 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 ow sensor to

measure ow rate; a ame sensor to monitor combustion; and an air-fuel ratio rod to measure and adjust air

input in order to maintain optimal combustion efciency. 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 re 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, 9008300005, can manifold 5-20

heaters. The Easy-Link and Multi-Unit Controller shall modulate the system for the most efcient 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 certied by CSA according to ANSI Z21.10.3, approved for sale in the

United States, has a minimum energy factor of 0.82, meets the energy efciency 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 certied to NSF 5 Standards.