Takagi T-K3 Installation Manual And Owner's Manual

On-demand water heater

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Service manual (70 pages)

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Page 1 Flash Water Heater™ Model T-K3 and T-K3-Pro Suitable for potable water heating and space heating TAKAGI Industrial Co. USA, Inc. FEATURING • ENDLESS HOT WATER 5 Whatney •...
Page 2: Table Of Contents
SCAQMD Rule 1146.2, CO emission does not exceed 400 PPM for normal input OUTPUT TEMPERATURE CHART…. WARRANTY………….………………..Takagi reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. - 2 -...
Page 3: Introduction
• Please read all installation instructions completely before installing this product. • If you have any problems or questions regarding this equipment, consult with Takagi or its local representative. • The T-K3/T-K3-Pro Water Heater is an on-demand, tankless water heater designed to efficiently supply endless hot water for your needs.
Page 4: Safety Guidelines
National Electrical Codes: ANSI/NFPA 70 in the USA or CSA standard C22.1 Canada Electrical Code Part 1 in Canada. Carefully plan where you intend to install your T-K3/T-K3-Pro Water Heater. Please ensure: • Your water heater will have enough combustible air and proper ventilation.
Page 5: Installation
As with any water heating appliance, the potential for leakage at some time in the life of the product does exist. Takagi will not be responsible for any water damage that may occur. If you install a drain pan under the unit, ensure that it will not restrict the combustion air flow.
Page 6: General
TK-TV10 direct vent conversion kit and convert the T-K3/T-K3-Pro to a sealed combustion unit. Direct venting allows the T- K3/T-K3-Pro to draw fresh intake air from the outside. The warranty will not cover damage caused to the unit due to installation in a contaminated environment that has not been converted using the TK-TV10.
Page 7 WARNING FOR INSTALLATION LOCATIONS Do not install the heater where water, debris Do not have the vent terminal pointing toward or flammable vapors may get into the flue any opening into a building. Do not locate terminal. This may cause damage to the your heater in a pit or location where gas and heater and void the warranty.
Page 8: Outdoor Installation
Right bank of dipswitches Right Bank of Dipswitches 4. The outdoor vent cap must be used when unit is installed outdoor. Takagi requires the use of its part No. TK-TV04. 5. When installed outdoors, the T-K3/T-K3-Pro water heater shall be wall-mounted or mounted on a stand.
Page 9: Indoor Installation
199 sq. in. area. Combustible Air Supplied by Mechanical fan or Make up air device The T-K3/T-K3-Pro water heater is equipped with a combustible air sensor that will shut off the unit when inadequate combustible air supply to unit is detected. •...
Page 10: Direct Intake Vent System
The T-K3/T-K3-Pro must be installed in a location where the proper amount of combustible air will be available to it at all times without obstructions. • If used as a direct vent appliance, the T-K3/T-K3-Pro requires a 3” combustible air supply pipe. The intake pipe must be sealed airtight. •...
Page 11: Venting Instructions
350ºF. For best results, a vent system should be as short and straight as possible. This Takagi water heater is a Category III appliance and must be vented accordingly with any 4” vent approved for use with Category III or Special BH type gas vent.
Page 12: Vent Termination
B149.1 and local applicable codes. • A proper sidewall vent terminator is recommended when the water heater is vented through a sidewall. If the T-K3/T-K3-Pro is converted to a direct-vent unit, a proper sidewall direct- vent terminator is to be used.
Page 13 • Install a condensation drain in the venting. • Follow the vent system to vent manufacturer’s instruction and local code. • Do not common vent or connect any vent from other appliances to the T-K3/T-K3-Pro vent. • Use 4” category III approved or Special BH, single or double wall stainless steel vent pipe.
Page 14: Vent Clearances
VENT CLEARANCES Canada U.S.A Direct vent and other than Direct Direct vent Other than Direct Vent Vent Clearance above grade, veranda, porch, 1 foot 1 foot 1 foot deck, or balcony. 4 feet from below or Clearance to window or door that may be 3 feet 1 foot side opening.
Page 15: Additional Clearances
ADDITIONAL CLEARANCES Please follow all local and national codes in regards to proper termination clearances. In the absence of such codes, the following clearances can be used as guidelines. Local codes supersede these guidelines. For sidewall terminations For multiple sidewall exhaust terminations (e.g. multi-unit systems), an exhaust termination must 2ft.
Page 16 Exhaust and/or direct-vent sidewall terminations should be at least 2 ft. away from an opposite surface/wall. Do not place the termination directly in front of an opening into a building. 2ft. Exhaust termination For rooftop terminations 2ft. Air intake Exhaust Air intake Exhaust termination...
Page 17: Gas Supply And Gas Pipe Sizing
Until testing of the main gas line supply pressure is completed, ensure the gas line to the T-K3/T- K3-Pro is disconnected to avoid any damage to the water heater.
Page 18 Otherwise, flow capabilities and output temperatures will be limited. Install a manual gas shut-off valve between the T-K3/T-K3-Pro and the gas supply line. When the gas connections are completed, it is necessary to perform a gas leak test either by applying soapy water to all gas fittings and observing for bubbles or by using a gas leak detection device.
Page 19: Water Connections
T-K3/T-K3-Pro. In addition, a manual shut off valve is also recommended on the hot water outlet of the unit. If the T-K3/T-K3-Pro is installed within, or subjected to, a closed loop water system, a thermal expansion tank must be installed.
Page 20: Pressure Relief Valve
PRESSURE RELIEF VALVE The Flash T-K3/T-K3-Pro has a high-temperature shut off switch built in as a standard safety feature (called a Hi-Limit switch) therefore a “pressure only” relief valve is required. This unit does not come with an approved pressure relief valve.
Page 21: Electrical Connections
T-K3/T-K3-Pro must be provided for service reasons. (Must comply with local codes). • Connect the power supply to the T-K3/T-K3-Pro exactly as shown in the wiring diagram; A green screw is provided in the junction box to ground the connection.
Page 22: Remote Controller Connection
REMOTE CONTROLLER CONNECTION 1) Disconnect power supply from the T-K3/T-K3-Pro. 2) Take off the T-K3/T-K3-Pro’s front cover. 3) Please find the remote control terminal using the picture below (located around the lower right-hand side of the computer board). 4) Open the plastic cover of the TM-RE30, and then attach the fork terminal to the connector base of the backside the TM-RE30 with two screws.
Page 23: Easy Link System
11,000 BTU and 796,000 BTU. Cold • The T-K3/T-K3-Pro Easy Link system is limited to 4 units. If you connect more than 4 units, the first 4 units will work as a part of the Easy Link system, but the other additional units will only work as individual units.
Page 24 Locate the bank of dipswitches to the right of the 7-seg. LED on the computer board of the T- K3/T-K3-Pro that you select to be the “MASTER” unit. Change dipswitch No. 1 to “ON”. Do not change any dipswitch settings on the “SLAVE” units.
Page 25 CAUTION • If you connect the “SLAVE IN (or SLAVE OUT) connector” of the “MASTER” unit to the “MASTER (or SLAVE IN) connector” of the “SLAVE-1” unit, the system will not work as a easy link system. The “ON LINE” lamps will stay unlit and the units will work as individual units.
Page 26: Pump Connection
To control a recirculation pump, connect the pump to the “Pump” connector in the T-K3/T-K3-Pro as shown in the diagram to the right. (In an Easy Link system, connect the pump ONLY to the “MASTER” unit.) The pump is to be connected using suitable relays shown in the diagram below.
Page 27: Initial Operation
Then close the hot water tap. 4. Fully open the manual 5. Turn on the 120 volt 60 Hz 6. Now you are ready to control valve power supply to the T-K3/T- enjoy hours of endless installed. K3-Pro water heater. hot water. - 27 -...
Page 28: Normal Operation
176/185 (unit:°F) • DO NOT set to 185 °F if you use your T-K3/T-K3-Pro in recirculation system. Refer to p.30 • Refer to the TM-RE30 Installation Manual to change the setting to the High Temperature mode. 3. Open a hot water tap.
Page 29: Supply
FLOW • The flow rate through the FLASH T-K3/T-K3-Pro is limited to a maximum of 7.0 GPM. • The temperature setting, along with the supply temperature of the water will determine the flow rate output of the unit. • Please refer to the temperature vs. gallons per minute chart on p. 46 to determine the likely flow rates based on your local ground water temperature and your desired outlet water temperature combination.
Page 30: Temperature Settings
• Only change the switches with the dark squares. The dark squares indicate which direction the dipswitch should be set to. • DO NOT set to 185 ºF if you use your T-K3/T-K3-Pro in a recirculation system. This will cause damage to the heater and void the warranty.
Page 31: Maintenance And Service
• Keep the area around the water heater clear. Remove any combustible materials, gasoline or any flammable vapors and liquids. TAKAGI recommends having the unit checked once a year or as necessary by a licensed technician. If repairs are needed, any repairs should be done by a licensed technician.
Page 32: General Troubleshooting
0.5 GPM through the water heater? (p. 28) • Is the unit frozen? • Is there enough gas in the tank? (for LP) • Is the flow rate enough to keep the T-K3/T-K3-Pro The hot water turns cold and stays cold.
Page 33 5 to 50 seconds in order to re-ignite quickly, as well as purge all the exhaust gas out of the flue. Abnormal sounds come from the unit . • Contact TAKAGI. ~ REMOTE CONTROLLER: TM-RE30 (OPTIONAL) ~ PROBLEM...
Page 34 TROUBLESHOOTING – ERROR CODES • All Takagi units are self diagnostic for safety and convenience when trouble shooting. • If there is a problem with the installation or the unit, it will display a numerical error code on the TM-RE30 (if installed) or on the 7-Seg LED at the bottom left corner of the computer board to communicate the source of the problem.
Page 35: Wiring Diagram
Electrical Rating: 120 VAC, 60 Hz Note: If any of the original wiring supplied with this appliance must be replaced, it must be replaced with appliance wiring material (180c) or its equivalent. Replacement wires are available through Takagi. AC120V White...
Page 36: Operating Safety
OPERATING SAFETY FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner.
Page 37 WARNING The outlet hot water temperature of the T-K3/T-K3-Pro water heater is factory set at 122 ºF. Use this heater at your own risk. The set outlet water temperature can cause severe burns instantly or death from scalds. Test the water before bathing or showering.
Page 38: Applications
• The T-K3/T-K3-Pro can be used to supply potable water and space heating and shall not be connected to any heating system or component(s) previously used with non- potable water where any chemicals were added to the water heating appliances.
Page 39: Dual-Purpose Heating
Domestic Water Heater Per Mass. Code An approved Pressure Only Relief Valve, Tie to Location Cold Inlet approved by Local Codes and Must Meet BTU Rating of Takagi Check Valve Will Model Used Have 1/8" Hole in Apply Correct 4" Gas Exhaust Vent (Discharge...
Page 40: Optional Items
Louver termination and the Hood termination. For different wall thicknesses, there are 3 ranges of lengths available (refer to the T-Vent brochure for details). TK-KPWL4 TK-KPWH4 Install these vent terminations in accordance with Takagi’s Hood Louver installation instructions and any applicable local codes. Termination...
Page 41: Components Diagram
COMPONENTS DIAGRAM Case assembly Other than the front cover (No.7), all of the T-K3-Pro’s parts are the same as the T-K3. 05 2 0 5 1 0 5 1 0 04 0 5 2 05 0 0 5 2 00 3...
Page 42: Burner Assembly
Burner assembly The T-K3 and the T-K3-Pro share the same components. 4 0 1 1 2 4 1 1 5 1 1 4 1 5 1 1 1 7 1 0 1 1 1 2 1 0 7 1 0 6...
Page 43: Water Way Assembly
Water way assembly Other than the heat exchanger assembly (No.420), all of the T-K3-Pro’s parts are the same as the T-K3. 4 1 0 4 1 5 4 1 1 4 5 9 4 5 2 4 0 3 4 5 1...
Page 44: Parts List
PARTS LIST Other than the front cover (No.7) and heat exchanger assembly (No.420), all of the T-K3-Pro’s components are the same as the T-K3. Item# Part# Description Item# Part# Description EKK1D Case assembly EKK1B Igniter plate EKK1J Front cover for T-K3...
Page 45 Inlet heater EKJ59 Freeze protection thermostat EKK2E Outlet drain plug EKN37 Fuse assembly Heat exchanger assembly EK322 EKJ66 Junction box inner plate for T-K3-Pro EW009 Screw M4×6 EKK1M Computer board cover EW00A Screw M4×3 EKK0D AC100V wire EZM16 O-ring P16 EPDM...
Page 46: Output Temperature Chart
Out Put Temperature vs. GPM (Max.7.0 GPM) with Various Ground Water Temperature Correct Gas pipe size can be expect this chart 40 F 50 F 60 F 70 F Out put Hot Water Temperature 40 F 50 F 60 F 70 F *When the set temperature is 158ºF or higher, maximum flow rate is limited to 5.4 GPM.
Page 47: Warranty
Internet (www.takagi.com/warranty). General terms of limited warranty: The manufacturer, Takagi Industrial Co. USA, Inc. will honor our warranty to the original retailed buyer only, and it is not transferable. This warranty strictly covers failed mechanical and electrical parts due to...
Page 48 44R018-1 - 48 - M-001-TK3-TK3PRO-0...

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