T-H3 Spec Sheet

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TRGSS01512
Residential / Commercial Gas
Tankless Water Heaters
SUGGESTED SPECIFICATION FOR T-H3 MODEL
The fully modulating, on-demand, condensing gas fired tankless water heater(s) shall be Takagi model T-H3-DV or T-H3-OS,
having a maximum input rating of 199,000 Btu/h and available in NG or LP. 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 indoor heater(s) shall incorporate an integrated temperature controller that will
provide diagnostic information, fault history, and heater set temperature. The outdoor heater(s) shall be factory supplied with
a temperature remote, 100209924, that can be installed up to 400 ft. from the heater using 18 gauge (minimum) control
wire. The temperature remote shall provide diagnostic information, fault history, and heater set temperature. The heater(s) shall
operate using 120 V / 60 Hz power source. The indoor heater(s) will incorporate a factory installed power cord.
The indoor heater(s) shall be vented with 3” or 4” diameter schedule 40 PVC, CPVC, ABS, or Category IV vent pipe with a
length not to exceed 70 ft. (equivalent) for 3” vent or 100 ft. (equivalent) for 4” vent, terminating horizontally or vertically. The
intake pipe may use material such as PVC, ABS, aluminum, or Category IV pipe and cannot exceed 70 ft. (equivalent) for 3”
vent or 100 ft. (equivalent) for 4” vent. The outdoor heater(s) shall be constructed with an integral exhaust vent on the front of
the heater.
The water heater(s) shall use a commercial-grade copper, fin tube primary heat exchanger with quick release brass or bronze
waterways. The secondary heat exchanger shall be constructed from stainless steel 316L. The heater(s) shall be controlled
by an on-board solid-state printed circuit board which uses the following factory installed components: thermistors to monitor
water temperature and exhaust temperature; a flow sensor to measure flow rate; a flame sensor to monitor combustion; an
Air-Fuel Ratio Rod to measure and adjust air input in order to maintain optimal combustion efficiency. The heater also consists
of in-line fusing and surge absorbers for electrical surge protection, an electronic spark igniter, aluminized stainless steel
burners, hi-limit temperature switches to monitor water and exhaust temperatures, modulating gas valve, dual freeze protection
that will automatically fire the heater (indoor model only) and use heating blocks to protect the heat exchanger, and an
overheat cutoff fuse.
The heater(s) can manifold to Easy-Link up to 4 heaters to provide additional capacity. The Easy-Link controls shall be built onto
the on-board solid-state printed circuit board and does not require external controls. The linking control wire shall be supplied
with the heater. The heater(s) can use a Multi-Unit controller, 100112691, to 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(s) shall be design certified by CSA according to ANSI Z21.10.3, approved for sale in the United States and
Canada, ENERGY STAR
®
qualified, has a minimum uniform energy factor of 0.93, meets the energy efficiency requirements
of the U. S. Department of Energy and ASHRAE 90.1-2007, complies with Ultra-Low NOx emissions of 14 ng/J or 20 ppm,
and shall be certified by NSF to NSF/ANSI 5 Standard.