Takagi Tankless Water Heaters, TK3 Takagi On Demand Water Heater, Natural Gas Hot Water Heater or Propane Hot Water Heater

Power Input	Natural Gas — 11,000-199,000 BTU Propane Gas — 11,000-199,000 BTU
Water Pressure	Minimum — 15 PSI Maximum — 150 PSI
Gas Connection	3/4"Male NPT
Water Connection	3/4"Male NPT
Natural Gas Pressure Inlet	Minimum — 5" WC Maximum — 10.5" WC
LP Gas Pressure	Minimum —8" WC Maximum — 13.5" WC
Electrical Supply	120 Volts / 0.77 Amps
Weight	40 lbs.
Dimensions (H x W x D)	20.5 inches by 13.8 inches by 8.5 inches
Minimum Flow to Activate	.5 GPM
Flow Rates (50 degree Input Water Assumed)	90°F rise / 3.7 gallons per minute 80°F rise / 4.1 gallons per minute 70°F rise / 4.7 gallons per minute 60°F rise / 5.4 gallons per minute 55°F rise / 5.9 gallons per minute 50°F rise / 6.5 gallons per minute 40°F rise / 7.0 gallons per minute
Manifold Pressure	Natural 2.5"WC Propane 4.4"WC
Exhaust Vent Size	4" - Sealed Stainless Steel Piping
Intake Vent Size (optional)	3" - Sealed Stainless Steel Piping
Ignition	Electronic Ignition

Required clearances for Outdoor Installations

Takagi T-K3	OUTDOOR INSTALLATION
TOP	36"
FRONT	24" (maintenance space)
BACK	1"
PIPING SIDE (bottom)	12"
SIDES	2"

Required clearances for INDOOR INSTALLATION

Takagi T-K3	INDOOR INSTALLATION
TOP	12"
FRONT	min. 4" (maintenance space)
BACK	1"
PIPING SIDE (bottom)	min. 12"
SIDES	2"

Takagi TK3 Combustion Air Supply Requirements

Air Supply From Outside Building	When combustion air is supplied from outside the building, an opening communicating directly with the outside should have a minimum free area of one square inch per 15,000 BTUH input of the total input rating of water heater in the enclosed area.
Air Supply From Inside Building	When combustion air is supplied from inside the building, an opening communicating with the rest of the dwelling should have a minimum free area of one square inch per 1000 BTUH input of the total input rating of water heater in the enclosed area. These openings should never be less than 100 sq. in.

Output Temperature Ratings of the Takagi T-K3

The Takagi T-K3 on demand water heater is factory preset at 122°. You can change the output temperature with the internal dipswitches to 104°, 113°, 122°, 140° or 182°. If you want to use any other temperatures than this you can purchase the optional Temperature Remote Controller (TM-RE10) that will allow the TK3 to have output temperatures from 99° to 185°.

Please Note: Hot Water Heater Temperatures over 125°F can cause severe burns instantly or death from scalding. Children, disabled and elderly are at the highest risk of being scalded. Feel water temperature before bathing or showering.

For more information download a
Takagi T-K3 installation manual in pdf format.
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