Takagi T-M50 User manual

Mobius Water Heater™

Model T-M50 / T-M50 ASME

Suitable for potable water heating and space heating

T-M50 / T-M50 ASME

On-Demand Water Heater

Installation Manual and Owner’s Guide

FEATURING

•ENDLESS HOT WATER

•ON-DEMAND USAGE

•COMPACT, SPACE SAVING

•ENERGY CONSERVATION

•COMPUTERIZED SAFETY

•NO PILOT LIGHT

•EASY LINK SYSTEM

WARNING

This product must be installed and

serviced by a licensed plumber, a

licensed gas fitter, or a professional

service technician. Improper installation

and/or operation, or installation by an

unqualified person, will void the

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.

TAKAGI Industrial Co. USA, Inc.

5 Whatney

Irvine, CA 92618

Toll Free: (888) 882-5244 USA

Toll Free: (877) 877-4953 CANADA

For supplying potable

hot water

ASME model ONLY

- 2 -

CONTENTS

*40 psi or above is recommended for maximum flow

NOTE

*All references to the T-M50 also refer to the

T-M50 ASME model

*Check the rating plate to ensure this product

matches your specifications.

*In accordance with ANSI Z21.10.3 and

SCAQMD Rule 1146.2, CO emission does not

exceed 400 PPM for normal input

SPECIFICATIONS

Natural Gas Input

(Operating Range) Min: 15,000 Btu/h

Max: 380,000 Btu/h

LPG Input

(Operating Range) Min: 15,000 Btu/h

Max: 380,000 Btu/h

Gas Connection 1” NPT

Water Connections 1” NPT

Water Pressure 15 - 150 psi *

Natural Gas Pressure

Inlet Min. 5” WC

Max. 10.5” WC

LP Gas

Pressure Inlet Min. 8” WC

Max. 14” WC

Manifold Pressure Natural: 2.8” WC

Propane: 3.8” WC

Weight 112lbs.

Dimensions H25.3”×W24.8”×D11.8”

Ignition Electric Ignition

Supply 120VAC (60Hz)

Operation 178 W

(1.48A)

Standby 16 W

(0.13A)

Electric Consumption

Freeze-

Protection 271 W

(2.26A)

SPECIFICATIONS……………………….

INTRODUCTION…………………………

SAFETY GUIDELINES………………....

INSTALLATION…………………………..

General…………………………………

Included Accessories…….……………

Outdoor Installation……………………

Indoor Installation…………………......

Direct Intake Vent System…………….

Venting Instructions………………......

Gas Supply / Gas Pipe Sizing………..

Water Connections……………………

Pressure Relief Valve…………………

Electrical Connections……………......

Remote Controller Connection………

Pump Connection… … … … … … …

Easy Link System … … … … … … …

Multi-Unit System………………………

Initial Operation………………………..

NORMAL OPERATION………………….

Normal Operation…………………......

Flow……………………………………..

Freeze Protection System…………...

Temperature Settings………………….

Maintenance and Service…………….

GENERAL TROUBLESHOOTING… … .

WIRING DIAGRAM …………………… ..

OPERATING SAFETY…………………..

APPLICATIONS………………………......

Re-Circulation……………...................

Dual-Purpose Heating………………...

ADDITIONAL CLEARNCES……………..

OPTIONAL ITEMS………...……………..

COMPONENTS DIAGRAM…………….

PARTS LIST………………………………

OUTPUT TEMPERATURE CHART……

PRODUCT REGISTRATION AND

LIMITED WARRANTY……………….......

Takagi reserves the right to discontinue, or change at any time, specifications

or designs without notice and without incurring obligations.

- 3 -

INTRODUCTION

1. A hot water tap is turned on.

2. Water enters the heater.

3. The water flow sensor detects the water flow.

4. The computer automatically ignites the burner.

5. Water circulates through the heat exchanger and then gets hot.

6. The computer will modulate the gas supply valve and water flow to produce the right

amount of hot water at the correct temperature.

7. When the tap is turned off, the unit shuts down.

*This diagram illustrates

Takagi’s tankless water

heater design concepts

only and is not accurate to

the T-M50’s physical

description.

•This manual provides information necessary for the installation, operation, and

maintenance of the Mobius T-M50 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.

•If you have any problems or questions regarding this equipment, consult with Takagi or its

local re

resentative.

•The T-M50 Water Heater is an on-demand, tankless water heater designed to efficiently

endless hot water for

needs.

•T-M50 has two heat exchangers. The primary and secondary heat exchangers alternate

roles, extendin

the life of the T-M50

(

see

. 4

)

•The principle behind the T-M50 Water Heater is simple:

- 4 -

TWO COMBUSTION SECTIONS WITHIN THE T-M50

The T-M50 contains two combustion sections. The section that turns on first is whichever

section the T-M50 decides is the primary section. The moment at which the secondary section

fires will depend on the total flow rate and set temperature of the water heater:

Flow rate at which the secondary section fires

( GPM ) T-M50 set temperature

(°F)

3.2 100-120

2.9 125,130

2.6 140

2.4 145,150

2.1 155-185

Example: If the set temperature is 120ºF:

＊The section(s) in operation is indicated by the black square(s).

Right combustion section

＊The primary and secondary section will reverse roles every 100 firing cycles or every 12 hours of unit operation.

Left combustion section

T-M50 T-M50 T-M50 T-M50

Depending on which side is the primary section

Total Flow < 0.5 GPM

(no section turns on) 0.5 GPM ≦Total Flow < 3.2

GPM

rimar

section fires onl

3.2 GPM < Total Flow

(both primary and

secondary sections fire)

- 5 -

SAFETY GUIDELINES

•Installation and service must be performed by a qualified installer (for

example, a licensed plumber or gas fitter), otherwise the warranty by Takagi

will be void.

•The installer (licensed professional) is responsible for the correct

installation of your Mobius T-M50 Water Heater and for compliance with all

national, state/provincial, and local codes.

PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW ALL DIRECTIONS.

GENERAL

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. Properly ground the unit in accordance with all local codes or in the absence of local codes,

with the National Electrical Codes: ANSI/NFPA 70 in the USA or CSA standard C22.1

Canada Electrical Code Part 1 in Canada.

3. Carefully plan where you intend to install your T-M50 Water Heater. Please ensure:

•Your water heater will have enough combustible air and

proper ventilation.

•Locate your heater where water leakage will not damage

surrounding areas (please refer to p. 6).

4. Check the rating plate for the correct GAS TYPE, GAS

PRESSURE, WATER PRESSURE and ELECTRIC RATING.

*If this unit does not match your requirements, do not install and

consult with Takagi.

5. If any problem should occur, turn off all hot water taps and turn off

the gas. Then call a trained technician or the Gas Company or the

manufacturer.

WARNING

•Water temperatures over 125ºF can cause severe burns instantly or death from

scalding. The water temperature is set at 120ºF (49ºC) from the factory to minimize any

scalding risk. Before bathing or showering always check the water temperature.

•Do not store or use gasoline or other flammables, vapors, or liquids in the

vicinity of this appliance.

•Do not reverse the water and/or gas connections as this will damage

the gas valves and can cause severe injury or death. Follow the

diagram on p. 18 when installing your water heater:

•Do not use this appliance if any part has been in contact with or been

immersed in water. Immediately call a licensed plumber, a licensed gas

fitter, or a professional service technician to inspect and/or service the

unit if necessary.

•Do not disconnect the electrical supply if the ambient temperature will drop below

freezing. The Freeze Prevention System only works if the unit has electrical power. The

warranty will not be covered if the heat exchanger is damaged due to freezing. Refer to

the section on the Freeze Prevention System on p. 32 for more information.

WARNING

Prohibited

Rating plate

- 6 -

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. Hard water scaling and/or corrosion must

be avoided or controlled by proper water treatment.

•TAKAGI recommends using the Takagi direct vent kit, when the water

heater is installed in a beauty salon. Some chemicals used in a beauty

salon may affect the flame sensor. Water heater may not work properly.

•Although the T-M50 is designed to operate with minimal sound, TAKAGI

does not recommend installing the unit on a wall adjacent to a

bedroom, or a room that is intended for quiet study or meditation, etc.

•Locate your heater close to a drain where water leakage will not do damage

to surrounding areas. 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.

•The T-M50 weighs 112 lbs. Ensure that any and all support structures

(whether it is installed on a wall, on a support stand, etc.) have enough

strength to support and hold the T-M50.

•When handling the T-M50, do not place your hands inside the flue

collar. Injury may result.

•TAKAGI does not recommend installing unit in an attic due to safety

issues. If you install your T-M50 in an attic:

•Make sure your unit will have enough combustion air and proper

ventilation.

•Keep the area around your T-M50 clean. When dust collects on the

flame sensor, the water heater will shut down on errors.

•If the above conditions cannot be met, use the direct vent conversion kit

TM-DV50.

•Locate unit for easy access for service and maintenance.

•A drain pan is required to be installed under the water heater in case of

leaks.

WARNING

CAUTION

- 7 -

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. 8 and p. 10 for proper clearances.

3. The electrical connection requires a means of disconnection, to terminate power to the

water heater for servicing and safety purposes.

4. If you will be installing the unit in a contaminated area with a high level of dust, sand,

flour, aerosols or other contaminants/chemicals, they can become airborne and enter

and build up within the fan and burner causing damage to the unit. In those

environments (e.g. residential or commercial laundry facilities, hair salons, pet salons,

chemical plants etc.), please purchase the optional TM-DV50 direct vent conversion kit

and convert the T-M50 to a sealed combustion unit. Direct venting allows the T-M50 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 TM-DV50.

5. Particles from flour, aerosols, and other contaminants may clog the air vent or reduce

the functions of the rotating fan and cause improper burning of the gas. Regularly ensure

that the area around the unit is dust- or debris-free; regular maintenance is

recommended for these types of environment.

6. Do not install the unit where the exhaust vent is pointing into any opening in a building or

where the noise may disturb your neighbors. Make sure the vent termination meets the

required distance by local code from any doorway or opening to prevent exhaust from

entering a building (refer to p. 15).

INCLUDED ACCESSORIES

Check that the installation manual, the communication cable, and the warranty card are

included with the unit.

Items

Manual

Communication Cable

Warranty Card

: 1

Qty: 1

- 8 -

The dark square is the direction

the dipswitch should be set to.

Keep the clearances.

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. Install outdoors only in areas with mild, temperate climates.

3. Ensure that the unit is set for outdoor installation. Locate the center computer board.

On the center computer board, locate the lower bank of dipswitches to the right of the

7-Seg. LED on the computer board. The ‘OUT’ dipswitch on that bank should be

switched to its ‘ON’ (up) position (Do not adjust the upper bank of dipswitches).

4. The outdoor vent cap must be used when unit is installed outdoor. Takagi requires the

use of its part No. TM-VC50.

5. When installed outdoors, the T-M50 water heater shall be wall-mounted or mounted on a

stand. Locate the water heater in an open, unroofed area and maintain the following

minimum clearances:

Make sure power to the unit is

turned OFF before changing

the dipswitch settings.

TMP1

TMP2

TMP3

MODE

DIRE

OUT

P-ALARM

MST

1 2 3 4 5 6 7 8

Lower Bank of Dipswitches

There is a 2” clearance from the

left and right sides of the unit to

combustible and non-combustible

surfaces. However, if any portion

or area of the surface is exposed to

the exhaust fumes (i.e. directly to

the sides of the vent cap), that

surface must be at least 24”

away.

7-Seg LED

Lower bank of

dipswitches

Upper bank of

dipswitches

Back 0.5”

Side 2”

Top 36”

Bottom 12”

*Side 24”

Front 4”

(24” Recommended

for Maintenance)

*Front 24”

- 9 -

WARNING FOR INSTALLATION LOCATIONS

Do not install the heater where water, debris

or flammable vapors may get into the flue

terminal. This may cause damage to the

heater and void the warranty.

Do not have the vent terminal pointing toward

any opening into a building. Do not locate

your heater in a pit or location where gas and

water can accumulate.

Do not install this water heater under an

overhang less than 3 feet from its top or

eaves. The area under an overhang must be

open to three sides.

Do not install the water heater vent terminator

within 1 ft. in the USA of any air intake or

building opening, and with in 3 ft. in Canada

of any air intake or building opening. (Refer to

p.15)

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.

Prohibited Prohibited

3 Ft.

Takagi

1 Ft.（USA ）

3 Ft.（Canada ）

1 Ft.（USA ）

3 Ft.（Canada ）

1 Ft.（USA ）

3 Ft.（Canada ）

- 10 -

Keep the clearances.

WARNINGINDOOR 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. When installed indoors, the T-M50 water

heater shall be located in an area to

maintain the following minimum clearances

around the unit:

Combustion Air Supply

The water heater location must provide enough air for proper combustion and ventilation of the

surrounding area. See the latest edition of ANSI Standard Z223.1 or any applicable local codes.

In general, these requirements specify that if the unit is installed in a confined space, there must

be a permanent air supply opening.

Minimum recommended air supply opening size for water heater:

Water heater size

When drawing

make-up air from

outside the building

When drawing make-up

air from inside

the building (from other rooms within)

25.3 Sq. IN 380 Sq. IN

MAX

380,000 BTU

When combustion air is supplied

from outside the building, an

opening communicating directly

with the outside should have a

minimum free area of one

square inch per 15,000 BTUH

input of the total input rating of

water heater in the enclosed

area.

When combustion air is supplied from

inside the building, an opening

communicating with the rest of the

dwelling should have a minimum free

area of one square inch per 1,000

BTUH input of the total input rating of

water heater in the enclosed area.

This opening should never be less

than 199 sq. in.

Combustible Air Supplied by Mechanical fan or Make up air device

The T-M50 water heater is equipped with a combustible air sensor that will shut off the unit

when inadequate combustible air supply to unit is detected.

•If a mechanical fan or make up air device is used to supply air to the water heater or

utility room, the installer should make sure it does not create drafts which could cause

nuisance shutdowns.

•If a blower is necessary to provide adequate combustion air to the water heater, the

blower and water heater must be set up so that the water heater cannot fire unless the

blower is operating. Possible methods include the use of the T-M50’s internal fan

control port or the use of external flow sensors/transmitters and relays.

Top 12”

Side 2”

Front 4”

(24” Recommended

for Maintenance) Bottom 12”

Back 0.5”

Other manuals for T-M50

Table of contents

Popular Water Heater manuals by other brands

Kenmore

Kenmore 153.582400 Use & care guide

Applimo

Applimo Edel AIR Installation and operating instructions

STIEBEL ELTRON

STIEBEL ELTRON Eltronom SHU 5 S Operating and installation instructions

clage

clage E-Mini Series Operating and installation instructions

Toyotomi

Toyotomi Oil Miser OM-180 installation manual

Bradford White

Bradford White EF Series Service manual

Eccotemp

Eccotemp 40-H Use & care manual

Dimplex

Dimplex ECSd125-580 Installation and user instructions

Dux

Dux 32FCR6N installation manual

Toyotomi

Toyotomi Oil Miser OM-148 (Type D) Operation and maintenance instructions

Noritz

Noritz N-132M Owner's guide and installation manual

TESY

TESY GCV7/4S 10047 Instructions for use and maintenance

A.O. Smith

A.O. Smith Gphe 50 instruction manual

Koryo

Koryo KWHZF15Y user manual

Pentair

Pentair PSC-14-4-02 Installation and operation manual

GE 40M06AAG Energy guide

Thermor

Thermor AEROMAX SPLIT 2 Instructions for use

American Hometec

American Hometec AHQ-B03X Installation and operation manual