Takagi T-KJr2U-IN Installation Manual And Owner's Manual
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Takagi T-KJr2U-IN Installation Manual And Owner's Manual

Takagi T-KJr2U-IN Installation Manual And Owner's Manual

On-demand water heater
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On-Demand Water Heater
Installation Manual and Owner's Guide
Gas Tankless Water Heater
Suitable for potable water heating and space-heating*
* Please refer to local codes for space-heating compliance.
FEATURING
(510U (T-D2U) models only)
110U Indoor (T-KJr2U-IN)
310U Indoor (T-K4U-IN)
510U Indoor (T-D2U-IN)
WARNING
TM
Models
110U Outdoor (T-KJr2U-OS)
310U Outdoor (T-K4U-OS)
510U Outdoor (T-D2U-OS)

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Summary of Contents for Takagi T-KJr2U-IN

  • Page 1 On-Demand Water Heater Installation Manual and Owner’s Guide Models 110U Indoor (T-KJr2U-IN) 110U Outdoor (T-KJr2U-OS) 310U Outdoor (T-K4U-OS) 310U Indoor (T-K4U-IN) 510U Indoor (T-D2U-IN) 510U Outdoor (T-D2U-OS) WARNING Gas Tankless Water Heater Suitable for potable water heating and space-heating* * Please refer to local codes for space-heating compliance.

  • Page 2: Installation Manual

    Contents CONTENTS Installation Manual Owner's Guide...
  • Page 3 Installation Manual CONGRATULATIONS...

  • Page 4: Specifications

    SPECIFICATIONS 110U 110U 310U 310U 510U 510U Model Indoor Outdoor Indoor Outdoor Indoor Outdoor (T-KJr2U-IN) (T-KJr2U-OS) (T-K4U-IN) (T-K4U-OS) (T-D2U-IN) (T-D2U-OS) Natural Gas Input Gas Connection Water Connections Water Pressure* Natural gas Inlet Pressure Manifold Pressure** Weight Dimensions Ignition should not need adjustment...
  • Page 5 INTRODUCTION...

  • Page 6: Safety Guidelines

    Safety Guidelines SAFETY GUIDELINES SAFETY DEFINITION DANGER WARNING CAUTION GENERAL GAS TYPE, GAS PRESSURE, WATER PRESSURE and ELECTRIC RATING do not install and consult with the manufacturer WARNING...

  • Page 7: Installation

    INSTALLATION GENERAL...

  • Page 8: Included Accessories

    Installation and service must be performed by a qualified installer (for example, a licensed plumber or gas fitter), otherwise the warranty will be void. WARNING The installer (licensed professional) is responsible for the correct installation of the water heater and for compliance with all national, state / provincial, and local codes.
  • Page 9 510U (T-D2U) models only KWd/KE > /dD^ 110U 110U 310U 310U 510U 510U Indoor Outdoor Indoor Outdoor Indoor Outdoor Model (T-KJr2U-IN) (T-KJr2U-OS) (T-K4U-IN) (T-K4U-OS) (T-D2U-IN) (T-D2U-OS) ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓...
  • Page 10 1. 4” Backflow preventer and F-F adaptor: 2. Direct-vent conversion kit: 9007667005 9007996005 (TK-TV10) 3. Pipe covers: 9007670005 (TK-PC01) 4. Recess box: 9007674005 (TK-RB02) 5. Sidewall vent terminator (Hood) and Wall thimble kit: 9008004005 and 9008005005 Wall thimble (4"-7") Termination (5"-10") 9008004005 9008005005 6.

  • Page 11: Warning For Installations

    WARNING FOR INSTALLATIONS FOR YOUR SAFETY, READ BEFORE INSTALLATION: Prohibited Prohibited...

  • Page 12: High Altitude Installations

    HIGH-ALTITUDE INSTALLATIONS Indoor models Altitude 0 (DEFAULT) Up to 2,500 ft Up to 5,000 ft Up to 7,500 ft Over 7,500 ft DIPswitches (Lower bank of DIPswitches) Outdoor models Altitude 0 (DEFAULT) Up to 2,000 ft Up to 4,000 ft Up to 6,000 ft Over 6,000 ft DIPswitches...

  • Page 13: Venting Instructions

    VENTING INSTRUCTIONS For indoor models -General- DANGER CAUTION The manufacturer recommends the NovaVent line. General rules for venting water heaters are: General rules for vent terminations: any air intake devices...
  • Page 14 *For each elbow added, deduct 5 ft. (1.5m) from max. vent length. No. of Elbows Max. Vertical or Horizontal Vent Length -DIPswitch settings for Vent length- For Indoor and direct-vent models 110U Indoor (T-KJr2U-IN) 510U Indoor (T-D2U-IN) Vent length 310U Indoor (T-K4U-IN) (Upper bank of DIPswitches)
  • Page 15 For the 110U Indoor (T-KJr2U-IN), 310U Indoor (T-K4U-IN) and 510U Indoor (T-D2U-IN) models conversion kit with water heater...
  • Page 17 & & CAUTION...

  • Page 18: Gas Supply And Gas Pipe Sizing

    GAS SUPPLY AND GAS PIPE SIZING -General- Check that the type of gas matches the rating plate first. Ensure that any and all gas regulators used are operating properly and providing gas pressures within the specified range shown below. Excess gas inlet pressure may cause serious accidents.
  • Page 19 Based on energy content of 1,000 BTU/Cubic ft.: The water heater requires 140 Cubic ft./hr for the 110U (T-KJr2U) models, 190 Cubic ft./hr for the 310U (T-K4U) models, and 199 Cubic ft./hr for the 510U (T-D2U) models. Unit: Cubic feet per hour Pipe size Length Diameter...

  • Page 20: Water Connections

    THIS IS ONLY TO BE DONE BY A LICENSED PROFESSIONAL WATER CONNECTIONS CAUTION As Close as Possible inlet Cold Pressure relief valve outlet inlet...

  • Page 21: Electrical Connections

    -Pressure relief valve- “pressure only” ANSI Z21.22 CAN 1-4.4 ELECTRICAL CONNECTIONS WARNING CAUTION All indoor models come with a power plug instead of a junction box. The following procedure is for outdoor models only. 120 VAC, 60 Hz electrical power supply that is properly grounded Indoor models only Outdoor models only Connect...
  • Page 22 dDWZ dhZ ZDKd KEdZK>>Z -INCLUDED ACCESSORIES- Temperature Screws Manual Remote controller cable remote controller -INSTALLATION- This remote controller is NOT waterproof CAUTION <Mounting and wiring the remote controller> Back plate (Fig. A and B) Back plate (Fig. B) Fig. A Fig.
  • Page 23 "Fork terminals" "Remote controller terminal" (Fig. C-1) (Fig. C-2) Main body "Back plate" "Remote controller cable" Fig. C-1 Fig. C-2 <How to connect the remote controller to the water heater> 110U (T-KJr2U) and 310U (T-K4U) models 9008172005 (TM-RE40) Connect other end to these terminals Front of remote...
  • Page 24 * Do NOT jump or short-circuit the wires, or computer will be damaged. 510U (T-D2U) models 9008172005 (TM-RE40) Connect other end to these terminals Front of remote...
  • Page 25  ^z >/E< ^z^dD h d  h -General- Easy-Link connection with allowable heaters Gas In Hot Out Cold In 4 units Only listed models on the table above can be combined together as an CAUTION Easy-Link System These models cannot be combined together with other models not listed on the table above.
  • Page 26 “PARENT” “PARENT” “PARENT” lower bank of DIPswitches to the ON position “CHILD” “PARENT” “CHILD-1” “PARENT” “PARENT” “1” “CHILD-1” “CHILD-1” “CHILD-2” “2” “CHILD-1” “1” “CHILD-2” “CHILD-2” “CHILD-3” “2” “CHILD-2” “1” “CHILD-3” Type of unit Unit # of easy-link Parent Child 2, 3 or 4 (A) 510U (T-D2U) models Computer board Easy-Link / connectors...
  • Page 27 NOTICE (C) Examples of incorrect settings and /or connections CASE 1: Wrong DIPswitch setting on the "PARENT" unit “PARENT” CASE 2: Wrong connections between the "PARENT" unit and the "CHILD-1" unit “1" (or "2") “PARENT” “PARENT" (or "1") “CHILD-1”...
  • Page 28 CASE 3: Wrong connections between the "CHILD-1" unit and the "CHILD-2" unit “PARENT” “CHILD-1” “1” “CHILD-2” “CHILD-2” “PARENT” damage the computer board WARNING CASE 4: Remote controller connected to incorrect unit “PARENT” “CHILD” “CHILD” CHILD-1 unit...
  • Page 29 Dh>d/ hE/d ^z^dD 510U 9008300005 (T-D2U) (TM-MC02) Hot Out Cold IN Multi-unit system connection diagram...
  • Page 30 APPLICATIONS In order to purge air in water pipes within a closed-loop system, an air vent and air separator should be installed in the system. Required circulation flow rates are labeled next to each application diagram. These flow rate WARNING requirements must be followed *The recirculation pump is to be controlled by: -Dual-set aquastat (recommended w/timer)
  • Page 31 > > through each activated unit in the system. Priority Control Devices NOTICE...

  • Page 32: Initial Operation

    INITIAL OPERATION FOR YOUR SAFETY, READ BEFORE OPERATING Check the GAS and WATER CONNECTIONS Check the GAS PRESSURE Check for PROPER VENTING and COMBUSTIBLE AIR Purge the GAS and WATER LINES IF YOU SMELL GAS: WARNING Operation...
  • Page 33 Owner's Guide Owner's Guide CONGRATULATIONS...

  • Page 34: Operating Safety

    Owner's Guide OPERATING SAFETY FOR YOUR SAFETY READ BEFORE OPERATING WARNING: OPERATING INSTRUCTIONS STOP! TO TURN OFF GAS TO APPLIANCE...
  • Page 35 Owner's Guide DANGER Vapors from flammable liquids will explode and catch fire causing death or severe burns. WARNING: Do not install water heater where flammable products will be stored. Read and follow water heater warnings and instructions. If owner’s manual is missing, contact the manufacturer.

  • Page 36: Normal Operation

    Owner's Guide NORMAL OPERATION ZDKd KEdZK>>Z Display for Temperature "INFO" Button "COLD" Button "HOT" Button IN USE LED (Green) "ON/OFF" Button STAND BY LED (Orange) GENERAL CAUTION NOTICE...
  • Page 37 Owner's Guide dDWZ dhZ ^dd/E'^ Operation Screen "ON/OFF" "HOT" "COLD" (Increasing temperature, example 140 °F to 145 °F) -510U (T-D2U) models only- "HOT" "HOT" "INFO" dDWZ dhZ d > K& ZDKd KEdZK>>Z a) For 110U (T-KJr2U) and 310U (T-K4U) models °F °C b) For 510U (T-D2U) models...

  • Page 38: Additional Features

    Owner's Guide ADDITIONAL FEATURES "INFO" Operation Screen "INFO" "INFO" "INFO" "INFO" -Unit conversion mode- Operation Screen "ON/OFF" "INFO"...
  • Page 39 Owner's Guide dDWZ dhZ ^dd/E'^ KE d, W t/d,Khd ZDKd KEdZK>>Z 110U (T-KJr2U) and 310U (T-K4U) models Computer board 510U (T-D2U) models (Lower bank of DIPswitches) Computer board Lower bank of DIPswitches NOTE: WARNING...
  • Page 40 Owner's Guide FLOW Household Flow Rates Flow rate Appliance/Use GPM (US) L/min Model Flow rate &Z WZKdd/KE ^z^dD CAUTION...

  • Page 41: Unit Draining And Filter Cleaning

    Owner's Guide D /EdE E E ^Zs/ WARNING UNIT DRAINING and FILTER CLEANING Unscrew 8. Clean the filter Hand- tighten only...

  • Page 42: Troubleshooting

    Owner's Guide TROUBLESHOOTING GENERAL PROBLEM SOLUTIONS...
  • Page 43 Owner's Guide PROBLEM SOLUTIONS...

  • Page 44: Error Codes

    Owner's Guide ERROR CODES -General- 110U (T-KJr2U) and 310U (T-K4U) models 510U (T-D2U) models Error code on the remote controller 9008172005 (TM-RE40) Error code on the computer board Example: If your unit has the “321” error code (which signifies an inlet thermistor failure) Remote controller 9008172005 (TM-RE40): Water heater: >...
  • Page 45 Owner's Guide & consult with the manufacturer Green Malfunction Remote Diagnosis description...
  • Page 46 Owner's Guide Green Malfunction Remote Diagnosis description...

  • Page 47: Components Diagram

    Owner's Guide Components Diagram COMPONENTS DIAGRAM Case assembly Outdoor models Indoor models Temperature remote controller...
  • Page 48 Owner's Guide Components Diagram Computer board assembly 110U (T-KJr2U) and 310U (T-K4U) models 510U (T-D2U) models Surge box assembly...
  • Page 49 Owner's Guide Components Diagram Burner assembly Exhaust section (Outdoor models)
  • Page 50 Owner's Guide Components Diagram Water Way assembly (510U (T-D2U)models) 510U (T-D2U) models To Water inlet section To Water outlet section Water outlet section Water inlet section...

  • Page 51: Parts List

    Owner's Guide Parts List PARTS LIST Part # Item # Description 110U, 310U and T-KJr2U, T-K4U and T-D2U models 510U models...
  • Page 52 Owner's Guide Parts List Part # Item # Description 110U, 310U and T-KJr2U, T-K4U and T-D2U models 510U models...
  • Page 53 Owner's Guide Parts List Part # Item # Description 110U, 310U and T-KJr2U, T-K4U and T-D2U models 510U models...

  • Page 54: Output Temperature Chart

    Owner's Guide Output Temperature Chart OUTPUT TEMPERATURE CHART 110U (T-KJr2U) models Output Temperature vs. GPM (Max. 6.6 GPM) with Various Inlet Water Temperature 310U (T-K4U) models Output Temperature vs. GPM (Max. 8.0 GPM) with Various Inlet Water Temperature 510U (T-D2U) models Output Temperature vs.

  • Page 55: Limited Warranty

    Owner's Guide Warranty LIMITED WARRANTY Application Type Heat Exchanger Parts Labor THIS WARRANTY COVERS ONLY FAILED MECHANICAL AND ELECTRICAL PARTS DUE TO FACTORY DEFECTS UNDER NORMAL USAGE FOR THE PRODUCT’S INTENDED PURPOSES AND WITHIN THE APPLICABLE PERIOD SPECIFIED IN THE FOLLOWING TABLES. ONLY DIRECT DAMAGES SHALL BE RECOVERABLE BY A CLAIMANT UNDER THIS LIMITED WARRANTY AND, IN NO EVENT, WHETHER AS A RESULT OF BREACH OF CONTRACT, BREACH OF WARRANTY, TORT LIABILITY (INCLUDING NEGLIGENCE), STRICT LIABILITY, INDEMNITY OR OTHERWISE WILL BE LIABLE FOR ANY SPECIAL, INCIDENTAL, OR INDIRECT CONSEQUENTIAL DAMAGES INCLUDING PROPERTY...
  • Page 56 Owner's Guide Warranty...

This manual is also suitable for:

T-d2u-inT-d2u-osT-k4u-inT-kjr2u-osT-k4u-os

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