Takagi Flash Water Heater T-KD20 Installation Manual And Owner's Manual
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Takagi Flash Water Heater T-KD20 Installation Manual And Owner's Manual

Instantaneous water heater
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T-KD20
Installation Manual and Owner's Guide
Flash Water Heater
Model T-KD20
Suitable for potable water heating and space heating
Indoor Installation Only
FEATURING
•
ENDLESS HOT WATER
•
ON DEMAND
•
COMPACT, SPACE SAVING
•
ENERGY CONSERVING
•
COMPUTER CONTROLS
•
COMPUTERIZED SAFETY
•
NO PILOT LIGHT
Takagi Industrial Co. USA Inc.
3-B Goodyear
Irvine, CA 92618
Toll Free (888) 882-5244
www.takagi-usa.com
Instantaneous Water Heater
FOR YOUR SAFETY
must be installed and serviced by a
qualified professional service technician
licensed plumber or gas fitter when
installed in the Common Wealth of
Massachusetts and or any other state.
Operation creates carbon monoxide gas
and flue gases, which can cause serious
injury or death. Improper installation
and/or operation, or installation by an
unqualified person, will void warranty.
WARNING
: If the information in this
manual is not followed exactly, a fire or
explosion may result, causing property
damage, personal injury or death.
Do not store or use gasoline or other
•
flammable vapors or liquids in the
vicinity of this or any other gas
appliance.
WHAT TO DO IF YOU SMELL GAS
•
Do not use any appliance.
•
Do not touch any electrical
•
switch
your building.
Immediately contact your gas
•
supplier from another location.
Follow
instructions.
If you cannot reach your gas
•
supplier,
department.
Installation and service must be
•
performed by a qualified installer,
service agency or the gas supplier.
1
- This product
Warning
do not use any phone in
,
the
gas
supplier's
call
the
fire

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Summary of Contents for Takagi Flash Water Heater T-KD20

  • Page 1 COMPUTER CONTROLS • Installation and service must be COMPUTERIZED SAFETY • • NO PILOT LIGHT performed by a qualified installer, service agency or the gas supplier. Takagi Industrial Co. USA Inc. 3-B Goodyear Irvine, CA 92618 Toll Free (888) 882-5244 www.takagi-usa.com...

  • Page 2: Table Of Contents

    • Check the rating plate to insure this Exploded Diagrams………………………. 24-27 product matches your specifications. Parts List………………………………….. Flow Chart……………………………….. • Takagi - USA is constantly improving our products, therefore specifications subject to change without prior notice. • - 2 -...

  • Page 3: For Your Safety

    5. If a problem should occur, turn off all hot water All Takagi products flue gas vents are pressurized, taps and turn off the gas. Call a trained requiring careful sealing of all joints.

  • Page 4: Operation

    2. Unit will detect flow, burners will ignite, and “Fire On” lamp will light up. Flow The flow rate through the T-KD20 is limited to a maximum of 6.9 GPM. The temperature setting, along with the supply temperature of the water will determine the flow rate the unit puts out.

  • Page 5: Freeze Protection

    Department of Energy method of testing water If the heater will not be in use for a long period of heater output, the T-KD20 is rated for 250 gallons time or if the temperatures will drop below 5º F (- 15º...

  • Page 6: Installation

    Electrical Connections All gas water heaters require careful and correct installation to ensure safe and efficient operation. The T-KD20 requires a 60 Hz 120 VAC electrical This manual must be followed exactly. power supply, and it should be properly grounded in accordance with the most recent edition of the 1.

  • Page 7: Wiring Diagrams

    Wiring Diagram Electrical Rating: 120 VAC, 60 Hz, 0.8 A. 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. Wires are available through the manufacturer.

  • Page 9: Gas Supply Piping

    Gas Supply Piping Insufficient gas supply pressure can cause the Flash Water Heater to lose efficiency or not work Attention: Proper gas pressure is important but at all. gas volume is more critical than pressure. With the right volume of gas supplied to system full WARNING: Fire or explosion may result if the performance can be expected.

  • Page 10: Water Plumbing

    Water Piping Important: Purge the water line of air, and clean the filter before initial operation. Follow local guidelines for the length of the plumbing line in order to ensure that there is WARNING: Do not reverse the hot outlet and cold enough water pressure for all the fixtures on the supply line connections to the Flash Water Heater.

  • Page 11: Wall Hanging Installation

    T Vent and Flex-L. This unit requires 4” vent pipe. For a wall mount installation, use TK-BK01 Connect the vent pipe to the unit so that it is brackets to securely attach the T-KD20 to the wall. sealed airtight. Follow...

  • Page 12: Combustion Air Supply

    For your safety, read before operating. system that all combustible air supplies from WARNING: If you do not follow these instructions outside building. The T-KD20 must be installed in exactly, a fire or explosion may result causing a location where the proper amount of combustible property damage, personal injury or loss of life.

  • Page 13: Maintenance

    7. Turn on the electrical power to the appliance. life of your water heater. 8. Turn on any tap, and the T-KD20 will initiate itself. 9. If the appliance will not operate, follow the instructions in the “Turning Off the Gas Supply...
  • Page 14 GFCI and the All Takagi units are self-diagnostic for errors. If circuit plate. Contact Takagi Industrial Company there is a problem with the installation or the unit, it for Instructions.

  • Page 15: Applications

    Applications The FLASH T-KD20 can be used for space heating as well as potable heating of hot water applications. WARNING • Toxic chemicals such as used for boiler treatments chemical, alcohol, glycerol and glycol group will not be introduced into the system when used for potable water and space heating.
  • Page 16 Dual-purpose hot water heating (Domestic and Heating): Diagrammatic Layout of Radiant Heating and Domestic Water Heater Priority Control Devices: It has a capability to make priority system that can be used as a controller flow sensor, Aquastat, or electronic controller to controlling radiant, Hydro or baseboard heating equipments.

  • Page 17: Storage Tank

    T-KD20 with Storage Tank The maximum flow rate through the T-KD20 is 6.9 GPM. If it is necessary to achieve higher flow rates for longer periods of time, then it can be installed in conjunction with a storage tank. A pump will be necessary to keep the water hot.

  • Page 18: For Your 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 19: Danger

    WARNING The outlet hot water temperature of the T-KD20 water heater is factory set 120 °F. WARNING: 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 21: Optional Items

    This is CSA from the T-KD20 to be approved part of the adjusted within unit. This helps prevent harmful exhaust gases range of 95 °F to 167 from entering the home, as well as helping to °F, and it also works as a diagnostic tool that will...

  • Page 22: Dipswitch Settings

    T-KD20 Dipswitch Temperature Settings In the following dipswitch diagrams, the direction in which the head of the dipswitch should be pointing is represented with black. Indoor NG Dipswitch Settings NG Indoor Temperature Settings ° F ° F 105° F 112° F...

  • Page 23: Indoor Lp Dipswitch Settings

    Indoor LP Dipswitch Settings LP Indoor Temperature Settings 105° F 112° F 120° F 180° F ERROR Outdoor LP Dipswitch Settings LP Outdoor Temperature Settings 105° F 112° F 120° F 180° F ERROR...

  • Page 24: Exploded Diagrams

    Computer board assembly...
  • Page 25 Case assembly...
  • Page 26 Burner assembly...
  • Page 27 Waterway assembly...

  • Page 28: Parts List

    T - KD20 PARTS LIST CASE ASSEMBLY SCREW BACK GUARD PANEL ASSEMBLY SPARK ELECTRODE HOLDER FRONT COVER SPARK ELECTRODE FIXING PLATE FLAME SENSOR TRANSFORMER SCREW JUNCTION BOX DAMPER JUNCTION BOX COVER WIRE HOLDER SCREW SCREW SCREW (COATED) MANIFOLD SCREW GASKET SCREW GASKET SILICON RING...

  • Page 29: Flow Chart

    Minuite Gallon...

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