Takagi T-M50 Installation Manual And Owner's Manual
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Takagi T-M50 Installation Manual And Owner's Manual

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910 / 910 ASME (T-M50/T-M50 ASME)
On-Demand Water Heater
Installation Manual and Owner's Guide
ANSI Z21.10.3
and CSA 4.3
Gas Tankless Water Heater
910 / 910 ASME
(T-M50 / T-M50 ASME) Models
Suitable for potable water heating and space-heating *
*Please refer to local codes for space-heating compliance.
FEATURING
• ENDLESS HOT WATER
• ON-DEMAND USAGE
• COMPACT, SPACE SAVING
• ENERGY CONSERVATION
• COMPUTERIZED SAFETY
• NO PILOT LIGHT
• EASY-LINK SYSTEM
HLW
If the information in these
instructions is not followed
exactly, a fire or explosion
WARNING
may result causing property
damage, personal injury or
death.
-Do not store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.
-WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch, do not
use any phone in your building.
• Immediately call your gas supplier from
a neighbor's phone. Follow the gas
supplier's instructions.
• If you cannot reach your gas supplier,
call the fire department.
-Installation and service must be performed
by a qualified installer, service agency or
the gas supplier.
If you have any questions, please
call or write to:
500 Tennessee Waltz Parkway
Ashland City, TN 37015
Toll Free: 1-877-737-2840
For supplying potable
hot water
ASME model ONLY

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Summary of Contents for Takagi T-M50

  • Page 1 910 / 910 ASME (T-M50/T-M50 ASME) On-Demand Water Heater Installation Manual and Owner’s Guide For supplying potable hot water ASME model ONLY ANSI Z21.10.3 and CSA 4.3 If the information in these instructions is not followed exactly, a fire or explosion...

  • Page 2: Table Of Contents

    GENERAL TROUBLESHOOTING…….. generally should not need adjustment. OPERATING SAFETY………………...… APPLICATIONS………………………..NOTE Re-Circulation……………....*All references to the 910 (T-M50) also refer to the Dual-Purpose Heating………………... 910 ASME (T-M50 ASME) model ADDITIONAL CLEARANCES…………… *Check the rating plate to ensure this product OPTIONAL ITEMS………...……………..

  • Page 3: Introduction

    INTRODUCTION • This manual provides information necessary for the installation, operation, and maintenance of the water heater. • The model description is listed on the rating plate which is attached to the front cover of the water heater. • Please read all installation instructions completely before installing this product. •...
  • Page 4 TWO COMBUSTION SECTIONS WITHIN THE 910 (T-M50) Left combustion section Right combustion section The water heater contains two combustion sections. The section that turns on first is whichever section the water heater decides is the primary section. The moment at which the secondary...

  • Page 5: Safety Guidelines

    SAFETY GUIDELINES • Installation and service must be performed by a qualified installer (for example, a licensed plumber or gas fitter), otherwise the warranty by the manufacturer will be void. • The installer (licensed professional) is responsible for the correct installation of the water heater and for compliance with all national, WARNING state/provincial, and local codes.

  • Page 6: Installation

    INSTALLATION All gas water heaters require careful and correct installation to ensure safe and efficient operation. This manual must be followed exactly. Read the “Safety Guidelines” section at the beginning of this manual. • The warranty will not cover damage caused by water quality. Water hardness that leads to scale formation and/or corrosion may affect/damage the water heater.

  • Page 7: General

    GENERAL 1. The manifold gas pressure is preset at the factory. It is computer controlled and should not need adjustment. 2. Maintain proper space for servicing. Install the unit so that it can be connected or removed easily. Refer to p. 9 and p. 10 for proper clearances. 3.

  • Page 8: Warning For Installations

    1 Ft . （ USA ） 3 Ft . （ Canada ） 3 Ft . （ Canada ） Takagi Do not install next to a dryer or any source of airborne debris that can be trapped inside the combustion chamber, unless the system is direct vented.

  • Page 9: Outdoor Installation

    OUTDOOR INSTALLATION 1. Follow all local codes, or in the absence of local codes, follow the most recent edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural Gas, Propane Installation Code in Canada. 2.

  • Page 10: Indoor Installation

    INDOOR INSTALLATION Top 12” 1. Follow all local codes, or in the absence of local codes, follow the most recent edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or CAN/CSA B149.1 Natural Gas, Propane Installation Back 0.5”...

  • Page 11: Direct Intake Vent System

    DIRECT INTAKE VENT SYSTEM This water heater may be converted to a direct-vent (sealed combustion) appliance by installing an adapter (Part No. 9007669005 (TM-DV50)) which will bring all required combustible air from outside the building. When installing the direct-vent conversion kit, please follow all instructions included with the kit.

  • Page 12: Venting Instructions

    VENTING INSTRUCTIONS WARNING: Improper venting of this appliance can result in excessive levels of carbon monoxide which can result in severe personal injury or death. This water heater must be vented in accordance with the section “Venting of Equipment" of the latest edition of the Natural Fuel Gas Code: ANSI Z223.1, all applicable local building codes, and Section 7 of CAN/CSA B149.1 Natural Gas in Canada, Propane Installation Code in Canada.

  • Page 13: Vent Termination

    VENT TERMINATION WARNING: Improper installation can cause nausea or asphyxiation, severe injury or death from carbon monoxide and flue gases poisoning. Improper installation will void product warranty. • The vent termination provides a means of installing vent pipe through the building wall and must be located in accordance with ANSI Z223.1/NFPA 54, or in Canada with CAN/CSA- B149.1 and local applicable codes.
  • Page 14 Horizontal Installation Diagram Wall Vertical condensation drain (Install according to local codes) Sidewall vent termination Vent damper (Recommended for freezing weather conditions: 36°F and below) Rain cap Vertical Installation Diagram Roof Roof flashing Vent damper (Recommended for freezing weather conditions: 36°F and below) Vertical condensation drain (Install according to local codes)

  • Page 15: 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 16: Gas Supply And Gas Pipe Sizing

    GAS SUPPLY AND GAS PIPE SIZING TO TURN OFF GAS TO APPLIANCE 1. Turn off all electric power to the water heater if service is to be performed. 2. Turn the manual gas valve located on the outside of the unit clockwise  to the off position. WARNING: Conversion of this unit from natural gas to propane or vice versa will void all warranty.
  • Page 17 Maximum Delivery Capacity of Cubic Feet of Gas per Hour of IPS Pipe Carrying Natural Gas of 0.60 Specific Gravity Based on Pressure Drop of 0.5” WC Based on Energy Content of 1,000 BTU/Cubic Ft.: 910 (T-M50) requires 380 Cubic Ft./hr. Unit: Cubic Feet per Hour...
  • Page 18 -Measuring inlet gas pressure- 1. Turn off all electric power to the water heater if service is to be performed. 2. Turn the manual gas valve located on the outside of the unit clockwise  to the off position. The water heater cannot perform properly without sufficient inlet gas pressure. Below are instructions on how to check the inlet gas pressure.

  • Page 19: Water Connections

    WATER CONNECTIONS FOR YOUR SAFETY, READ BEFORE OPERATING: ・ Do not use this water heater if any part has been submersed under water. Immediately call a licensed professional to inspect the water heater and to replace any damaged parts. ・Do not reverse the hot outlet and cold inlet connections to the water heater. This will not activate the water heater.

  • Page 20: Electrical Connections

    ELECTRICAL CONNECTIONS WARNING: Follow the electrical code requirements of the local authority having jurisdiction. In the absence of such requirements, follow the latest edition of the National Electrical Code ANSI/NFPA 70 in the U.S. or the latest edition of CSA C22.1 Canadian Electrical Code, Part 1, in Canada.

  • Page 21: Remote Controller Connection

    REMOTE CONTROLLER CONNECTION 1) Disconnect power supply from the water heater. 2) Take off the water heater’s front cover. 3) Please find the remote control terminal using the diagram below (located around the lower right-hand side of the water heater). 4) Open the plastic cover of the remote controller, and then attach the two fork terminals to connector base of the backside of the remote controller with two screws.

  • Page 22: Pump Control Connections

    PUMP CONTROL CONNECTIONS The water heater can be used to control a recirculation pump. Proper pump control helps to preserve the life of the system and saves energy as well. The water heater pump control port is a “normally-open dry contact”, and therefore needs additional components to properly control a recirculation pump.

  • Page 23: Pump Control Mode

    PUMP CONTROL MODE The water heater provides the four types of the pump control modes. The pump control modes are selected by changing dipswitch settings. The dipswitches are located in the upper bank of dipswitches in the lower-left quadrant of the central computer board in the water heater. (See picture below) A) Recirculation Control: No.

  • Page 24: Easy-Link System

    EASY-LINK SYSTEM The water heater can be connected with other heaters of the same model with communication cables to work as a multiple manifold system. • The Easy-Link system can connect up to 4 units. • A communication cable (gray color) comes with each unit. The cables use 18 gage wire and can be up to 250ft.
  • Page 25 Easy-Link Connection Procedures 1. Choose one of your units as the “PARENT” unit. 2. “The PARENT” Locate the lower bank of dipswitches to the right of the 7-seg. LED on the central computer board of the unit that you select to be the “PARENT” unit. Change dipswitch No. 8 to “ON”.
  • Page 26 CAUTION • If you connect the “[1] (or [2]) connector” of the “PARENT” unit to the “PARENT (or [1]) connector” of the “CHILD-1” unit, the system will not work as the Easy-Link system. The units will operate as individual units. Wrong connection between the “PARENT”...

  • Page 27: Multi-Unit System

    MULTI-UNIT SYSTEM FOR LARGE VOLUMES Multi-Unit system allows 910 (T-M50) model to be combined together from two to 10 units with the multi-unit controller and remote controller for commercial or residential applications. For a 10-unit system, the computer can modulate from 15,000 BTU/h to 3,800,000 BTU/h.
  • Page 28 This lamp will flash when the unit is allowed the operation. The Comunication Cables are included with the 910 (T-M50). The Cables use 18 gage wire and can be up to 250 ft. long all together. - 28 -...

  • Page 29: Initial Operation

    INITIAL OPERATION FOR YOUR SAFETY, READ BEFORE OPERATING: • Check the GAS and WATER CONNECTIONS for leaks before firing it for the first time. • Open the main gas supply valve to the unit using only your hand to avoid any spark. Never use tools.

  • Page 30: Normal Operation

    • Flow rate to activate the 910 (T-M50) : 0.5 gallon per minute • Flow rate to keep the 910 (T-M50) running : 0.4 gallon per minute WITHOUT REMOTE CONTROLLER 1. Open a hot water tap.* 2. Mix cold water with the hot to get 3.
  • Page 31 *To change the remote controller’s mode from Default Mode to High Temperature Mode, please follow the procedures below (the remote controller must be installed prior to operating these procedures): DO NOT set to 185ºF if you use your water heater in a recirculation system. This will cause damage to the heater and void the warranty.

  • Page 32: Flow

    FLOW • The flow rate through the water heater is limited to a maximum of 14.5 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.51 to determine the likely flow rates based on your local ground water temperature and your desired outlet water temperature combination.

  • Page 33: Temperature Settings

    TEMPERATURE SETTINGS • The temperature has been preset at the factory to 120 ºF (50 ºC). • There are 8 preset temperatures that you can select from by changing the dipswitch settings on the computer board. If you want to change the set temperature with dipswitches, please refer to the diagram below.

  • Page 34: Maintenance And Service

    MAINTENANCE AND SERVICE WARNING: Turn off the electrical power supply and close the manual gas control valve and the manual water control valve before servicing. • Clean the cold-water inlet filter. (Refer to diagram below) • Be sure that all openings for combustion and ventilation air are not blocked. •...

  • Page 35: General Troubleshooting

    GENERAL TROUBLESHOOTING ~ TEMPERATURE and AMOUNT OF HOT WATER ~ PROBLEM POSSIBLE SOLUTIONS • The time it takes to deliver hot water from the water It takes long time to get hot water at the fixtures. heater to your fixtures depends on the length of piping between the two.
  • Page 36 ~ WATER HEATER ~ PROBLEM POSSIBLE SOLUTIONS • Is the flow rate over 0.5 GPM? (p. 30) Unit does not ignite when water goes through the unit. • Check for the filter on cold water inlet. (p. 34) • Check for reverse connection and cross connection. •...
  • Page 37 TROUBLESHOOTING – ERROR CODES • The 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 remote controller (if installed) or on the 7-Seg LED of the central computer board and section computer board to communicate the source of the problem.

  • Page 38: 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 39 DANGER Vapors from flammable liquids will explode and catch fire causing death or severe burns. Do not use or store flammable products such as gasoline, solvents or adhesives in the same room or area near the water heater. Keep flammable products: Vapors: 1.

  • Page 40: Applications

    APPLICATIONS Space Heating Applications WARNING • In order to purge air in water pipes within a closed-loop system, an air vent and air separator should be installed in to the system. Required circulation flow rates are labeled next to each application diagram. These flow rate requirements must be followed.

  • Page 41: Dual-Purpose Heating

    Valve, Tie to Location approved By Cold Inlet approved by Local Codes and Local Codes and Must Meet BTU Must Meet BTU Rating of Takagi Rating of water heater Model Used Check Valve Will Model Used Have 1/8" Hole in Apply Correct 5"...

  • Page 42: 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 2ft. 1ft. 3ft. 2ft.

  • Page 43: Optional Items

    6. Pipe cover: 9007673005 (TM-PC50) DV50) This kit can be used to convert the The pipe cover protects the 910 (T-M50) from a conventional vent plumbing pipes to the 910 system to a direct-vent (or sealed (T-M50) from unexpected combustion) system. This is a CSA adjustments.

  • Page 44: Components Diagram

    COMPONENTS DIAGRAM Case assembly Computer board assembly The 910 (T-M50) and the 910 ASME (T-M50 ASME) models share the same components. 704 418 703 704 418 703 721 714 - 44 -...

  • Page 45: Burner Assembly

    Burner assembly The 910 (T-M50) and the 910 ASME (T-M50 ASME) models share the same components. - 45 -...
  • Page 46 Combustion and Exhaust assembly Other than Part# 444, Part# 445, Part# 446 and Part# 447, the 910 (T-M50) and the 910 ASME (T-M50 ASME) models share the same components. 910 ASME T-M50 ASME (T-M50 ASME) - 46 -...
  • Page 47 Water way assembly 910 (T-M50) 910 ASME (T-M50 ASME) - 47 -...

  • Page 48: Parts List

    PARTS LIST Part# Item# Description 910 models T-M50 models Case assembly 319143-265 EM305 Brackets 319143-012 EM335 Screw M4X10 (w/washer) 319143-325 EW001 Screw M4X10 (Coated) 319143-026 EW002 Back guard panel 319143-237 EM264 Power supply code assembly 319143-277 EM333 Junction box 319143-014...
  • Page 49 Heater 117 319143-223 EKN67 Outlet drain plug 319143-199 EKK2E O-ring P6 FKM 319143-080 EZM06 Heat exchanger assembly for 910 ASME (T-M50 ASME) 319143-270 EM323 Connection pipe for 910 ASME (T-M50 ASME) 319143-271 EM326 O-ring P18 FKM 319143-349 EZM18 - 49 -...
  • Page 50 Description 910 models T-M50 models Connecting pipe for 910 ASME (T-M50 ASME) 319143-278 EM370 Left cold pipe for 910 ASME (T-M50 ASME) 319143-310 EM456 Left hot pipe for 910 ASME (T-M50 ASME) 319143-313 EM459 Right hot pipe for 910 ASME (T-M50 ASME)

  • Page 51: Output Temperature Chart

    - Lack of a proper pump control will reduce the heat exchanger and parts warranty to 3 years (3) In all applications, the total of length of operation time must be less than 9,000 hours for the 910 (T-M50) and 910 (T-M50) ASME models.
  • Page 52 General terms of limited warranty: This limited warranty gives you specific legal rights, and you may also have other rights which vary from State to State. The manufacturer will honor the warranty to the original retail buyer at the original location only, within the United States or Canada, and it is not transferable.

This manual is also suitable for:

910 asme910

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