Takagi T-KD20 Water Heater - Installation Info For more detailed information - please download a T-KD20 installation manual (link at the bottom of this page) Return to T-KD20 Main Page

Technical Specs of the T-KD20 Power Input Natural Gas — 20,000-185,000 BTU LP Gas — 19,000-175,000 BTU Thermal Efficiency Propane (max) — 86% Natural Gas (max) — 85% Energy Factor Propane — 84% Natural Gas — 84% Water Pressure Minimum — 15 PSI Maximum — 150 PSI Gas Connection 3/4"Male NPT Water Connection 3/4"Male NPT Natural Gas Pressure Minimum — 5" WC Maximum — 10.5" WC LP Gas Pressure Minimum —11" WC Maximum — 14" WC Electrical Supply 120 Volts / 0.8 Amps Minimum Flow to Activate 3/4 gallons per minute Flow Rates (50 degree Input Water Assumed) 90°F rise / 3.4 gallons per minute 80°F rise / 3.9 gallons per minute 70°F rise / 4.4 gallons per minute 60°F rise / 5.2 gallons per minute 55°F rise / 5.8 gallons per minute 50°F rise / 6.2 gallons per minute Head Loss when used for heating applications 39 1/4 at 6.9 gpm Dimensions (H x W x D) 24 inches by 18 inches by 9 inches Out Water Temperature Factory preset at 120 degrees - can be set to 105, 112, 120 or 180 degrees with an internal dipswitch. Optional Temperature Remote control will allow range from 95 degrees to 180 degrees. Vent Size - 2 Pipe System Exhaust: 4" Sealed Stainless Steel vent pipe Intake: 3" Optional Accessories Direct Vent Terminator: TK-TV05 (comes with heater) Wall Hanging Kit: TK-WB01 (comes with heater) Backflow Preventer: TK-TV03 Temperature Remote Controller

Required clearances for OUTDOOR INSTALLATION Not Allowed for the T-KD20 - Use the AquaStar 240FX or Takagi T-K2 for outside installs in mild climates. Required clearances for INDOOR INSTALLATION Takagi T-KD20 INDOOR INSTALLATION TOP 12" FRONT 4" (24" suggested for maintenance space only) BACK 1" PIPING SIDE 6" NON PIPING SIDE 2" FLOOR Non-combustible base Gas & Venting for the Takagi T-K2D0 Gas Water Heater It is very important to have the proper size gas line - see the T-KD20 manual for more detail of pipe size or contact your local gas company or contractor. Gas 5/8" 3/4" 7/8" 1" Liquid Propane Not Recommended 35 feet 70 feet   Natural Gas   25 feet   80 feet Venting Min. Diameter Max. Vertical or Horizontal run Max. number of elbows Rule Direct Vent 4 inches (exhaust) 3 Inches (intake) 25 feet 3 Deduct 5ft. for each elbow from max. vent length Dimensions of the Takagi T-KD20 Height Width Depth Weight 24.5" 16.5" 8.3" 65 lbs.(shipping weight) Combustion Air and Ventilation Takagi T-KD20 Please Note: The T-KD20 must be connected to a Category III gas vent for discharge pipe in order to direct the dangerous exhaust byproducts to the outdoors. Connect the 4” Category III vent pipe to the minimum 2” round collar on through the outside wall. This water heater must be vented in accordance with the section on venting of equipment in the latest edition of the National Fuel Gas Code. This is a Category III appliance, and must be vented accordingly. The following are UL listed or CSA certified manufacturer: ProTech Systems FasNSeal Stainless Steel Venting. This unit requires 4” vent pipe. Connect the vent pipe to the unit so that it is sealed airtight. Follow the vent pipe manufacturer’s instructions when installing the vent pipe. Do not common vent this appliance with any other vented appliance. The venting system must not exceed a length of 25 ft. minus 5 ft. for every elbow. Do not use more than 3 elbows. If the horizontal vent run exceeds 5 ft., the following criteria must be observed: There must be a 1 ft. vertical run off the top of the heater before the horizontal run begins The horizontal run must be supported at 3 foot intervals The vent run should be pitched up towards the termination at ¼” per foot The unit should be vented out to directly through a wall Combustible Air Supply The T-KD20 is direct vent (Sealed Combustion) system that all combustible air supplies from outside building. The T-KD20 must be installed in a location where the proper amount of combustible air will be available to it at all times without obstructions. As combustible air supply pipe can be used suitable 3” pipe such as Galvanized single wall vent pipe, ABS 3”, colligate stainless steel pipe and category III stainless steel pipe supply air pipe. Output Temperature Ratings of the Takagi T-KD20 The T-KD20 is factory preset at 120 degrees. You can change the output temperature with the internal dipswitches to 105 degrees, 112 degrees, 120 degrees or 180 degrees. If you want to use any other temperatures that this - you can purchase the optional Remote Control Temperature that will allow the T-KD20 to have output temperatures from 95 degrees to 180 degrees. Please Note: Hot Water Heater Temperature over 125 Degrees F can cause severe burns instantly or death from scalding. Children, disabled and elderly are at the highest risk of being scaled. Feel water temperature before bathing or showering.

For more information download a Takagi T-KD20 installation manual in pdf format. Also see all water heater manuals from this link. Return to T-KD20 Main Page