A.O. Smith ATIO-910-AN, ATIO-910-AP, ATIO-910-N, ATIO-910-P Technical Documents

Download

Page 1

910 / 910 ASME (T-M50/T-M50 ASME)

If you have any questions, please

For supplying potable

hot water

On-Demand Water Heater Installation Manual and Owner’s Guide

Gas Tankless Water Heater

910 / 910 ASME (T-M50 / T-M50 ASME) Models

Suitab le for potable water heating and spa ce-hea ting

*Please refer to local codes for space-heating compliance.

ANSI Z21.10.3

and CSA 4.3

ASME model ONLY

WARNING

-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 the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death.

FEATURING

 ENDLESS HOT WATER  ON-DEMAND USAGE  COMPACT, SPACE SAVING  ENERGY CONSERVATION  COMPUTERIZED SAFETY  NO PILOT LIGHT  EASY-LINK SYSTEM

call or write to: 500 Tennessee Waltz Parkway Ashland City, TN 37015 Toll Free: 1-877-737-2840

Page 2

- 2 -

CONTENTS

SPECIFICATION

………………………......

51 51 The manufacturer

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

*40 psi or above is recommende

d for maximum flow.

SPECIFICATIONS………………………. INTRODUCTION…………………………

SAFETY GUIDELINES………………....

INSTALLATION………………………….. General………………………………… Included Accessories…….…………… Warning for Installations……………… 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 Control Connections......……...

Pump Control Mode…………………… Easy-Link System……………………… Multi-Unit System……………………… Initial Operation……………………….. NORMAL OPERATION………………….

Normal Operation…………………......

Flow…………………………………….. Freeze Protection System…………... Temperature Settings…………………. Maintenance and Service……………. GENERAL TROUBLESHOOTING…….. OPERATING SAFETY………………...… APPLICATIONS

Re-Circulation…………….................

Dual-Purpose Heating………………... ADDITIONAL CLEARNCES…………….. OPTIONAL ITEMS………...…………….. COMPONENTS DIAGRAM……………. PARTS LIST……………………………… OUTPUT TEMPERATURE CHART……

LIMITED WARRANTY……………….......

Natural Gas Input (Operating Range)

3 5

Propane Input

(Operating Range)

Gas Connection 1” NPT

Water Connections

Water Pressure

9 10

Natural Gas

Inlet Pressure

Propane

Inlet Pressure

Manifold Pressure**

19 20

Weight

Dimensions

22 23

Ignition

24 27

Electric

30 32 32 33 34

**The Manifold Pressure is the factory setting and

35 38 40 40 41

generally should not need adjustment.

NOTE *All references to the 910 (T-M50) also refer to the

910 ASME (T-M50 ASME) model *Check the rating plate to ensure this product

matches your specifications.

*In accordance with ANSI Z21.10.3,

CO emission does not exceed 400 PPM for normal input.

Supply

Consumption

Min: 15,000 Btu/h

Max: 380,000 Btu/h

Min: 15,000 Btu/h

Max: 380,000 Btu/h

1” NPT

15 - 150 psi * Min. 5.0” WC

Max. 10.5” WC

Min. 8.0” WC

Max. 14.0” WC

Natural: 2.8” WC

Propane: 3.8” WC

102 lbs.

H25.3”×W24.8”×D11.8”

Electric Ignition 120 VAC / 60 Hz

Operation

Standby

FreezeProtection

178 W (1.48A)

16 W (0.13A)

271 W (2.26A)

specifications or designs without notice and without incurring obligations.

Page 3

- 3 -

INTRODUCTION



mainten

ance of

the water heater.



the wate

r heater.



manufacturer or

its

local representative.



endless hot water f

or your

needs.



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

The model description is listed on the rating plate which is attached to the front cover of

Please read all installation instructions completely before installing this product.

If you have any problems or questions regarding this equipment, consult with the

This equipment is an on-demand, tankless water heater designed to efficiently supply

The water heater has two heat exchangers. The primary and secondary heat exchangers

alternate roles, extending the life of the water heater (see p. 4).

The principle behind the water heater is simple:

*This diagram illustrates tankless water heater design concepts only and is not accurate to the water heater’s physical

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.

Page 4

- 4 -

TWO COMBUSTION SECTIONS WITHIN THE 910 (T-M50)

Total Flow < 0.5 GPM

(primary section fires only)

3.2 GPM <

Total Flow

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 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 )

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).

(no section turns on)

910 (T-M50) 910 (T-M50)

0.5 GPM ≦ Total Flow < 3.2 GPM

Set temperature of the 910 (T-M50)

(°F)

(both primary and

secondary sections fire)

910 (T-M50)

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

Depending on which side is the primary section

Page 5

- 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 the manufacturer will be void.

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

WARNING

PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW ALL DIRECTIONS.

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 the 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 the manufacturer.

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.

installation of the water heater and for compliance with all national, state/provincial, and local codes.

GENERAL

Rating plate

WARNING

 Water temperatures over 125ºF (52ºC) 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

Prohibited

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.

Page 6

- 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.

CAUTION

WARNING

 The manufacturer recommends using the 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 this water heater is designed to operate with minimal sound, the

manufacturer 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. The manufacturer 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 water heater weighs 102 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 water heater.

 When handling the water heater, do not place your hands inside the

flue collar. Injury may result.

 The manufacturer does not recommend installing unit in an attic due

to safety issues. If you install your water heater in an attic:

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

ventilation.

 Keep the area around your water heater 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

9007669005 (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.

Page 7

GENERAL

Qty: 1

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. 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 direct-vent conversion kit and convert the water heater to a sealed combustion unit. Direct venting allows the water heater 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 direct-vent conversion kit.

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 product registration card are included with the unit.

Items

Manual

Communication Cable

Product Registration Card

- 7 -

Qty: 1

Page 8

3 Ft.

WARNING FOR INSTALLATIONS

FOR YOUR SAFETY, READ BEFORE INSTALLATION:

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.

Prohibited Prohibited

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 within 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.

1 Ft.（USA ） 3 Ft.（Canada ）

Takagi

1 Ft.（USA ） 3 Ft.（Canada ）

- 8 -

Page 9

The dark square is the direction

Make sure power to the unit is

TMP1 TMP2 TMP3

MODE DIRE

OUT P

ALARM MST

Back

0.5”

Front 4”

Lower

bank of

Upper

bank of

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 central computer board.

On the central 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).

dipswitches

7-Seg LED

dipswitches

4. The outdoor vent cap must be used when unit is installed outdoor. The manufacturer requires the use of its part No. 9007677005 (TM-VC50).

turned OFF before changing the dipswitch settings.

the dipswitch should be set to.

1 2 3 4 5 6 7 8

Lower Bank of Dipswitches

5. When installed outdoors, the 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:

There is a 2” clearance from the left and right sides of the unit to combustible and non-combustible

*Side 24”

Top 36”

*Side 24”

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.

Side 2”

*Front 24”

Side 2”

Keep the clearances.

(24” Recommended

for Maintenance)

Bottom 12”

- 9 -

Page 10

- 10 -

INDOOR INSTALLATION

Front

4”

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 water heater shall be located in an area to maintain the following minimum clearances around the unit:

Keep the clearances.

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 outside the building

make-up air from

Side 2”

(24” Recommended

for Maintenance)

Top 12”

Back 0.5”

Side 2”

Bottom 12”

When drawing make-up the building (from other rooms within)

air from inside

380 Sq. IN

MAX 380,000 BTU

25.3 Sq. IN

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 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 water heater internal fan control port or the use of external flow sensors/transmitters and relays.

Page 11

- 11 -

The dark square is the direction

DIRECT INTAKE VENT SYSTEM

Make sure power to the unit is

TMP1 TMP2 TMP3

MODE DIRE

OUT P

ALARM MST

Lower

bank of

Upper

bank of

DIRECT

VENT

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.

 The water heater 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 water heater requires a 5” combustible air supply

pipe. The intake pipe must be sealed airtight.

 Air supply pipe can be made of ABS, PVC, galvanized steel, corrugated aluminum,

corrugated stainless steel or Category III stainless steel.

 Change the dipswitch settings to the direct-vent system. (See diagram below)  Sidewall venting is recommended for the direct-vent system.  The manufacturer recommends running the exhaust vent and the intake pipe parallel.

dipswitches

7-Seg LED

dipswitches

turned OFF before changing the dipswitch settings.

INTAKE

the dipswitch should be set to.

1 2 3 4 5 6 7 8

Lower Bank of Dipswitches

EXHAUST

Direct-Vent Conversion Kit

CONVERSION KIT

LOUVER COVER PLATES

Page 12

- 12 -

VENTING INSTRUCTIONS

Diameter

Max. No. of Elbow

Max. V

ertical or Horizontal run in Length

5” 5

Ea. 50 ft

No. of Elbows

Max. Vertical or Horizontal Length

0 50 ft.

1 45

ft.

2 40 ft.

5 25 ft.

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, Section 7 of CAN/CSA B149.1 Natural Gas in Canada, Propane Installation Code in Canada.

EXHAUST VENT

This is a Category III appliance and must be vented accordingly. The vent system must be sealed air tight. All seams and joints without gaskets must be sealed with high heat resistant silicone sealant or UL listed aluminum adhesive tape having a minimum temperature rating of 350ºF. For best results, a vent system should be as short and straight as possible.

1. This water heater is a Category III appliance and must be vented accordingly with any 5”

vent approved for use with Category III or Special BH type gas vent.

2. The following are UL listed manufacturers: ProTech Systems Inc. (FasNSeal), Flex-L Inc.,

Z-Flex Inc. (Z-Vent III), Metal-Fab Inc., and Heat-Fab Inc. (Saf-T Vent).

3. Follow the vent pipe manufacturer’s instructions when installing the vent pipe.

4. Do not common vent this appliance with any other vented appliance (Do not

terminate vent into a chimney. If the vent must go through the chimney, the vent must run all the way through the chimney with Category III approved or Special BH vent pipe).

5. The maximum length of exhaust vent piping must not exceed 50 ft. deducting 5 ft. for each

elbow used in the venting system. Do not use more than 5 elbows.

*For each elbow added, deduct 5 ft. from max. Vent length.

6. When the horizontal vent run exceeds 5 ft., support the vent run at 3 ft. intervals with

overhead hangars.

7. The manufacturer will not be responsible for any damage to the water heater caused by

condensation from the vent. For horizontal runs, slope the vent run downwards toward the vent terminal at a rate of ¼” per foot. For horizontal runs that do not slope downward and for vertical runs, installing a condensate drip is recommended. Please refer to p. 14 for the diagrams.

When installing the vent system, all applicable national and local codes must be followed. If you install thimbles, fire stops or other protective devices and they penetrate any combustible or noncombustible construction, be sure to follow all applicable national and local codes.

Page 13

- 13 -

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 terminator 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/CSAB149.1 and local applicable codes.

 A proper sidewall vent terminator is recommended when the water heater is vented through

a sidewall. If the water heater is converted to a direct-vent unit, a proper sidewall direct-vent terminator is to be used.

General rules for venting the water heater are:

1. Place the water heater as close as possible to the vent terminator.

2. The vent collar of the water heater must be fastened directly to an unobstructed vent pipe.

3. Do not weld the vent pipe to the water heater collar.

4. Do not cut the vent collar of the unit.

5. The weight of the vent stack must not rest on the water heater.

6. The vent must be easily removable from the top of the water heater for normal service and

inspection of the unit.

7. The water heater vent must not be connected to any other gas appliance or vent stack.

8. Avoid locating the water heater vent terminator near any air intake devices. These fans

can pick up the exhaust flue products from the gas appliance and return them to the building. This can create a health hazard.

9. Avoid using an oversized vent pipe or using extremely long runs of the pipe.

10. Locate the vent terminator so that it cannot be blocked by any debris, at any time. Most

codes require that the terminator be at least 12 inches above grade, but the installer may determine if it should be higher depending on the job site condition and applicable codes.

11. For rooftop venting, a rain cap must be installed.

Page 14

Sidewall

Vertical Condensation Drain

Vent Damper

Vertical Condensation Drain

Horizontal Installation Diagram

(Install according to local codes)

(Recommended for freezing weather conditions: 36°F and below)

Vertical Installation Diagram

(Recommended for freezing weather conditions: 36°F and below)

Roof

Rain Cap

Roof Flashing

(Install according to local codes)

Wall

Vent Terminator

 Regarding the clearance from the terminator to the air inlet or opening, refer to the next

page.

 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 water heater vent.  Use 5” category III approved or Special BH, single or double wall stainless steel vent pipe.

- 14 -

Page 15

- 15 -

VENT CLEARANCES

Canada

U.S.A

Direct

vent and

Vent

Clearance above grade, veranda, porch,

C Clearance to permanently closed window

* * *

Vertical clearance to ventilated soffit

E Clearance to unventilated soffit

* * * F

Clearance to outside corner

* * * G

Clearance to inside corner

* * * H

Clearance to each side of center line

Clearance to service regulator vent outlet.

3 feet

* *

Clearance to non

mechanical air supply

4 feet from below or

Cle

arance to mechanical air supply inlet.

6 feet

3 feet

Clearance above paved sidewalk or

Clearance under veranda, porch deck, or

*For clearances not specified in ANS

I Z223.1 / NFPA 54 or CAN/CSA

B149

, please use clearances in

deck, or balcony. Clearance to window or door that may be

opened.

located above the vent terminator within a

horizontal distance of 2 feet (61cm) from the center line of the terminator.

extended above meter/regulator assembly

inlet to building or the combustion air inlet

to any other application.

paved driveway located on public property.

balcony.

other than Direct

1 foot 1 foot 1 foot

3 feet 1 foot

* * *

3 feet * *

3 feet 1 foot

7 feet * 7 feet

1 foot * *

Direct vent Other than Direct Vent

4 feet from below or

side opening. 1 foot

from above opening.

side opening. 1 foot

from above opening.

accordance with local installation codes and the requirement of the gas supplier.

Page 16

- 16 -

GAS SUPPLY AND GAS PIPE SIZING

Gas type

Inlet gas pressure

Natural Gas

Min. 5.0” WC

– Max. 10.5” WC

Propane

Min. 8.0” WC

– Max. 14.0” WC

NOTICE

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 vise versa will

TO TURN OFF GAS TO APPLIANCE

void all warranty. Contact your local distributor to get the correct unit for your gas type. The manufacturer is not liable for any property and/or personal

damage resulting from gas conversions.

*Check that the type of gas matches the rating plate first.

 The minimum and maximum inlet gas pressures are:

 Gas pressure above this specified range for the water heater and/or insufficient gas volume will

adversely affect performance. These pressures are measured when the water heater is in full operation.

 Inlet gas pressure must not exceed the above maximum values; gas pressure above the specified

range will cause dangerous operating conditions and damage to the unit. Ensure that any and all gas regulators used are operating properly and are providing gas pressures within the specified range shown above.

 Until testing of the main gas line supply pressure is completed, ensure the gas line to the water

heater is disconnected to avoid any damage to the water heater.

-Gas connections-

1. Install a manual gas shut-off valve between the water heater and the gas supply line.

2. When the gas connections are completed, it is necessary to perform a gas leak test (see below)

either by applying soapy water to all gas fittings and observing for bubbles or by using a gas leak detection device.

 The water heater and its individual shutoff valve must be disconnected from the gas supply

piping system during any pressure testing of that system at test pressures in excess of 1/2 psi (3.5 kPa).

 The water heater must be isolated from the gas supply piping system by closing its individual

manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5kPa).

3. Always purge the gas line of any debris and/or water before connecting to the gas inlet.

Size the gas pipe appropriately to supply the necessary volume of gas required for the water heater using ANSI233.1/NFPA 54 in the USA or CAN/CSA B149.1 in Canada or local codes. Otherwise, flow capabilities and output temperatures will be limited.

Page 17

- 17 -

Natural Gas Supply Piping

Pipe

Diameter

10’ 20’ 30’ 40’ 50’ 60’ 70’ 80’ 90’ 100’ 125’ 150’ 200’

¾” 567 393 315 267 237 217 196 185 173 162 146 132 112

1” 1,071 732 590 504 448 409 378 346 322 307 275 252

213 1 ¼”

205 1,496 1,212 1,039 913 834 771 724 677 630 567 511 440 1 ½”

307 2,299 1,858 1,559 1,417 1,275 1,181 1,086 1,023 976 866 787 675 2” 6,221 4,331 3,465 2,992 2,646 2,394 2,205 2,047 1,921 1,811 1,606 1,496 1,260

Gas Sizing Example

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

Size

Length

Diameter 10' 20' 30' 40' 50' 60' 70' 80' 90' 100' 125' 150' 200'

¾” 363 249 200 171 152 138 127 118 111 104 93 84 72

1” 684 470 377 323 286 259 239 222 208 197 174 158 135 1 ¼” 1,404 965 775 663 588 532 490 456 428 404 358 324 278 1 ½” 2,103 1,445 1,161 993 880 798 734 683 641 605 536 486 416

2” 4,050 2,784 2,235 1,913 1,696 1,536 1,413 1,315 1,234 1,165 1,033 936 801 2 ½” 6,455 4,437 3,563 3,049 2,703 2,449 2,253 2,096 1,966 1,857 1,646 1,492 1,277

3” 11,412 7,843 6,299 5,391 4,778 4,329 3,983 3,705 3,476 3,284 2,910 2,637 2,257

Propane (LP) Gas Supply Piping

Maximum Capacity of Propane (LP) Gas Based on 11” WC supply pressure at a 1.0” WC pressure drop

Size

10’ Length

1-1/2” Pipe Size

10’ Length

1-1/2” Pipe Size

Gas Meter

Water Heater

380,000BTU

20’ Length

1-1/4” Pipe Size

10’ Length

1” Pipe Size

(Natural Gas)

15’ Length

3/4” Pipe Size

10’ Length

3/4” Pipe Size

Furnace

120,000BTU

Dryer

35,000BTU

10’ Length

1/2” Pipe Size

15’ Length

1/2” Pipe Size

Range

65,000BTU

Length

Based on Energy Content of 1,000BTU/Cubic Ft:

Divide each appliance’s BTU requirement by 1,000BTU to get the appliances Cubic Ft. requirement.

Take into account the distance the appliance is from the gas meter, look in the above gas chart to properly size the line.

For sections of the gas line supplying gas to more than one appliance (Ex: Point A to Point B), add up the cubic ft. requirements of the appliances that are being supplied by that section, and size to the farthest appliance.

For Example: The section from A to B supplies gas to the furnace, range, and dryer. Adding up the BTU requirements and dividing by 1,000 yields a cubic ft. requirement of 220 cubic ft. of gas. The farthest appliance is the range, which is 60 ft. away from the meter. Looking at the above chart, and under the column of 60ft., Section A to B needs to be 1” in order to supply 220 cubic ft.

Unit: kBTU per Hour

Page 18

- 18 -

-Measuring inlet gas pressure-

The water heater cannot perform properly without sufficient inlet gas pressure. Below are instructions on how to check the inlet gas pressure. THIS IS ONLY TO BE DONE BY A

LICENSED PROFESSIONAL.

1. Shut off the manual gas valve on the supply gas line.

2. Remove the screw for the pressure port located on the gas inlet of the water heater shown in the diagram to the right.

3. Connect the manometer to the pressure port.

4. Re-open the manual gas valve. Check to see that there are no gas leaks. Open some of the fixtures that use the highest flow rate to turn on the water heater.

5. Check the inlet gas pressure. When the water heater is on maximum burn, the manometer should read from 5.0” to 10.5” WC for Natural gas, from 8.0” to 14.0” WC for Propane.

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.

Page 19

- 19 -

WATER CONNECTIONS

FOR YOUR SAFETY, READ BEFORE OPERATING:

As Close as

Possible

・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.

All pipes, pipe fittings, valves and other components, including soldering materials, must be suitable for potable water systems.

1. All pipes, pipe fittings, valves and other

components, including soldering materials, must be suitable for potable water systems.

2. A manual shut off valve must be installed on the

cold water inlet to the water heater between the main water supply line and the water heater.

3. In addition, a manual shut off valve is also

recommended on the hot water outlet of the unit. If the water heater is installed within, or subjected to, a closed loop water system, a thermal expansion tank must be installed.

4. Before installing the water heater, flush the water line to remove all debris, and after installation is complete, purge the air from the line. Failure to do so may cause damage to the heater.

5. There is a wire mesh filter within the cold inlet to trap debris from entering your heater.

This will need to be cleaned periodically to maintain optimum flow.

Pressure

Relief Valve

Hot out

Cold inlet

Gas

PRESSURE RELIEF VALVE

The water heater 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.  An approved pressure relief valve must be installed on the hot water outlet.  The pressure relief valve must conform to ANSI Z21.22 or CAN 1-4.4 and installation must

follow local code.

 The discharge capacity must be at least 380,000 BTU/h.  The pressure relief valve needs to be rated for a maximum of 150 psi.  The discharge piping for the pressure relief valve must be directed so that the hot water

cannot splash on anyone or on nearby equipment.

 Attach the discharge tube to the pressure relief valve and run the end of the tube to within

6" from the floor. This discharge tube must allow free and complete drainage without any restrictions.

 If the pressure relief valve installed on the water heater discharges periodically, this may

be due to a defective thermal expansion tank or defective pressure relief valve.

 The pressure relief valve must be manually operated periodically to check for correct

operation.

 No valve must be placed between the relief valve and the water heater.  When ASME model is installed, the pressure relief valve should be conformed and

installed in accordance with ASME code.

 For the ASME model, the pressure relief valve must conform to and be installed in

accordance with ASME code.

Page 20

- 20 -

ELECTRICAL CONNECTIONS

Connect Power supply

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.

CAUTION: When servicing or replacing parts within the water heater, label all wires prior to disconnection to facilitate an easy and error free reconnection. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.

1. The water heater must be electrically grounded. Do not attach the ground wire to either the gas or the water piping.

2. The water heater requires 120 VAC / 60 Hz electrical power supply that is properly grounded.

 A proper disconnect (i.e. on/off switch, power plug, etc.) controlling the main power to

the water heater must be provided for service reasons. (Must comply with local codes).

 Connect the power supply to the water heater exactly as shown in the wiring diagram;

3. A green screw is provided in the junction box to ground the connection.

4. Can be hardwired or wired to a plug-in.

5. The use of a surge protector is recommended in order to protect the unit from power

surges.

120 VAC / 60 Hz

Ground

Page 21

- 21 -

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 picture below (located around the lower

right-hand side of the water heater).

4) Open the plastic cover of the remote controller accessory, and then attach the fork terminal to

the connector base of the backside the remote controller accessory with two screws. Make sure the terminals are firmly fixed.

5) Put the remote wires through the hole on the bottom of the unit casing.

6) Connect the remote wires to the remote controller terminal properly. (No polarity)

*Do NOT jump or short-circuit wires. Computer will be damaged.

7) Replace Front Cover securely.

8) Wires used for the remote controller connection must be:

 Minimum 18AWG wire (No polarity)  Maximum 400 feet long

*For details on the connection to the remote controller accessory, refer to the remote controller’s Installation Manual.

Remote controller terminal of the water heater

Connect to these terminals

Connect other end to this terminal

Front of remote

Back of remote

Page 22

- 22 -

PUMP CONTROL CONNECTIONS

Connect to this terminal.

The

se compone

nts are

NOT

included

CAUTION:

In a multi

unit system, the pump must be connected to the

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. To control the recirculation pump, connect the pump to the “pump terminal” in the water heater as shown in the diagram below. (In a multi-unit system, connect the pump ONLY to the “PARENT” unit.) The pump is to be connected using suitable relays shown in the diagram below (the pump terminal is

essentially only a dry contact. An external power supply and relays are required to operate the pump). Please make sure the relays are properly rated for the recirculation pump.

Using the water heater’s internal thermistors as a temperature control, the recirculation pump will only turn on when recirculation is needed.

“Pump” terminal in the “PARENT” unit only. If the pump is connected to any of the “CHILD” units, the pump will not work.

with water heater and are external to the unit. They must be acquired separately.

This is the pump terminal.

Power supply for relay

Power supply for pump 120 VAC 220 VAC etc

120 VAC 220 VAC etc for relay

Thermal relay

Recirculation

pump

Page 23

- 23 -

The dark squares indicate the direction

PUMP CONTROL MODE

STORAGE

B) Storage Tank

A) Re

circulation

C) Energy Conserving

D) Normal C

ontrol

(Default

)

LP N

Upper

bank of

STORAGE

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. 4 ON

This mode is for providing hot water as soon as possible like a recirculation usage. The pump is only made to run while the temperature of the water in the re-circulation loop is not close to the set temperature of the water heater. The pump will run for about 1 minute every 30 minutes to determine whether or not the water temperature in the whole recirculation loop is lower than 9°F from the set temperature. If the water temperature is lower than 9°F from the set temperature, the pump will remain running until the water in the loop gets up to the set temperature. If not, the pump will stop for another 30 minutes. If the inlet thermistor senses that the water temperature is lower than 9°F from the set temperature before those 30 minutes have elapsed, the pump will activate immediately and remain running until the water in the loop gets up to the set temperature.

B) Storage Tank Circulation Control: No.5 ON

The water heater will heat the water 5.4°F higher than its set temperature (unless the water heater is already set at its maximum temperature of 185°F). This is to ensure a higher rate of recovery for storage tank applications. The circulation pump (from storage tank to water heater) will always remain on.

C) Energy Conserving Recirculation: No.4 and No.5 ON

This pump control mode is similar to the “Recirculation Control mode”. However, once the heat requirement is less than 7,440 BTU/h, the pump will turn off. The pump will activate again when the temperature of the system is less than 95°F or after 20 minutes have elapsed from its previous operation. *If operating the pump in this mode, insulation is recommended on the water piping.

D) Normal Control (Default setting): No.4 and No.5 OFF

This provides no ON/OFF control for the pump. If a pump is connected to the pump control terminal and both No.4 and No.5 are OFF, the pump will be made to run all the time as long as there is a power supply to the water heater (If the temperature remote controller is installed, the pump will stop when the remote is turned off). Water in the loop will be maintained at set temperature.

Circulation Control

Control

1 2 3 4 5 6 7 8

RE-CIR

D-PRT

1 2 3 4 5 6 7 8

RE-CIR

STORAGE

D-PRT

Recirculation

1 2 3 4 5 6 7 8

RE-CIR

Pump control modes

STORAGE

D-PRT

1 2 3 4 5 6 7 8

RE-CIR

D-PRT

dipswitches

the dipswitches should be set to.

Page 24

- 24 -

EASY-LINK SYSTEM

Easy

-Link /

Multi

unit

To change the dipswitch

Lower

bank of

Upper

bank of

Gas

Cold

Hot

This lamp will flash wh

en the unit is allowed the

operation

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. long all together.

You can manifold from 2 units to 4 units without a multi-system controller. A 4-unit system has full automatic modulation between 15,000 BTU/h and 1,520,000 BTU/h.

CAUTION

dipswitches

7-Seg LED

 The Easy-Link system is limited to 4 units. If you connect more than 4 units,

the first 4 units will work as part of the Easy-Link system, but the other additional units will only work as individual units.

 The water heater cannot be linked with other different tankless models

in the Easy-Link system and Multi-Unit system.

System connectors are on each unit’s computer board

settings for the Easy-Link system, locate the lower bank of dipswitches to the right of the 7-seg LED.

Do not adjust the upper bank of dipswitches.

dipswitches

Page 25

- 25 -

The dark squares indicate the direction

Easy-Link Connection Procedures

Wrong

dipswitch setting

PARENT

unit CHILD

-1

unit CHILD

-2

unit CHILD

-3

unit

PARENT

unit CHILD

-1

unit

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”. Do not change any of the dipswitches on the “CHILD” units.

3. Between the “PARENT” and the “CHILD-1”

Connect the “PARENT connector” of the “PARENT unit” to the “[1] connector” of the “CHILD-1” unit.

4. Between the “CHILD-1” and the “CHILD-2”

Connect the “[2] connector” of the “CHILD-1” unit to the “[1] connector” of the “CHILD-2” unit.

5. Between the “CHILD-2” and the “CHILD-3”

Connect the “[2] connector” of the “CHILD-2” unit to the “[1] connector” of the “CHILD-3” unit.

6. Make sure the 7-seg. LED of all the unit’s computer boards display the unit #. The numbering

system automatically allocates the unit # to each water heater in the Easy-Link system, in accordance with the table below.

PARENT unit Unit # : 1 CHILD units Unit# : 2, 3 and 4

the dipswitches should be set to.

Connectors

P A R E N T

Connectors

P A R E N T

Connectors

P A R E N T

Connectors

P A R E N T

Lower bank of Dipswitch

OFF

Communicati on cable

1 2 3 4 5 6 7 8

Lower bank of Dipswitch

OFF

Lower bank of Dipswit ch

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

OFF

Lower bank of Dipswit ch

1 2 3 4 5 6 7 8

OFF

CAUTION  Unless you change dipswitch No. 8 of the “PARENT” unit to “ON”, the system will not

work as an Easy-Link system. The units will work as individual units.

Connectors Connectors

P A R E N T

on the “PARENT” unit

11 22

Lower bank of Dipswitch

2 3 4 5 6 7 8

OFF

Communicat ion cable

Lower bank of Dipswitch

OFF

2 3 4 5 6 7 8

11 22

Page 26

- 26 -

CAUTION

PARENT

unit CHILD

-1

unit

PARENT

unit CHILD

-1

unit

PARENT

unit

CHILD

-1

unit

CHILD

-2

unit

 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” unit and the “CHILD-1” unit

Connectors Co nnectors

P A R E N T

Connectors C onnectors

P A R E N T

Lower bank of Dipswitch

OFF

Communicat ion cable

1 2 3 4 5 6 7 8

Lower bank of Dipswitc h

1 2 3 4 5 6 7 8

OFF

Lower bank o f Dipswitch

1 2 3 4 5 6 7 8

OFF

Communica tion cable

Lower bank of Dipswitch

OFF

1 2 3 4 5 6 7 8

 If you connect the “PARENT connector” of the “CHILD-1” unit to the “[1] connector” of the

“CHILD-2” unit, the “CHILD-2” unit will work as an individual unit, and will not be part of the Easy-Link system.

Wrong connection between the “CHILD-1” unit and the “CHILD-2” unit

Connector s Connector s Conne ctors

P A R E N T

Lower bank of Dipswitch

OFF

Communication cable

1 2 3 4 5 6 7 8

Lower ban k of Dipswitch

OFF

1 2 3 4 5 6 7 8

Lower bank of Dipswit ch

1 2 3 4 5 6 7 8

OFF

WARNING Connecting two “PARENT connectors” together from two separate units may

damage the computer board. The communication cable has a female end

and a male end so it’s impossible to have a PARENT -to- PARENT connection with the communication cable. Do not splice or modify connectors.

11 22

Prohibited

Page 27

Wrong connection

9007675005

(TM-MC01)

PARENT

unit CHILD

unit

Remote controller

 If a remote controller (optional) is used, it has to be connected to the “PARENT” unit. If the

remote controller is connected to a “CHILD” unit, it will only control that particular individual “CHILD” unit and will not control the Easy-Link system as a whole.

between the “CHILD” unit and the remote controller

Connectors Connec tors

P A R E N T

11 22

Lower ba nk of Dipswitc h

1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8

OFF

Communica tion cable

 The remote controller is not required for the Easy-Link system.  If running the Easy-Link system without the remote controller, please make

Lower bank o f Dipswitch

OFF

P A R E N T

11 22

sure the dipswitch settings for the temperature, outdoor, and direct-vent settings on ALL the units are set to the same settings. Otherwise, the units may not operate properly.

 If the remote controller is used, the temperature on all the units in the

system will automatically be set to the same temperature that is set on the remote. However, even with the remote, the outdoor and direct-vent dipswitch settings still need to be set to the same settings on all the units.

MULTI-UNIT SYSTEM FOR LARGE VOLUMES

Multiple 910 (T-M50) models can be combined for a Multi-Unit system, along with the Multiple Unit Controller and Remote Controller (Parts 9007675005 (TM-MC01) and 9007603005 (TMRE30)). Each set of controllers (Parts 9007675005 (TM-MC01) and 9007603005 (TM-RE30)) can control from 2 units to 10 units for commercial or residential applications. For a 10-unit system, the computer can modulate between the usages of 15,000 BTU/h to 3.8 Million BTU/h.

Cold IN

910

(T-M50)

Hot Out

- 27 -

Page 28

- 28 -

An individual cut-off switch is recommended for each unit in a multi-unit system for the purpose

The

Comunication Cables are included wit

h the

910 (T-

M50)

. The

Easy

-Link /

Multi

unit

Lower

bank of

Upper

bank of

This lamp will flash when the unit is allowed

the

operation

Unit2 Unit3 Unit4

9007603005

(TM-RE30)

9007675005

(TM-MC01)

of maintenance.

Multi-Unit System Connection Diagram

Multi-Unit Controller (9007675005 (TM-MC01)) and Temperature Remote Controller (9007603005 (TM-RE30)) wiring:

Unit 1

Connectors Connectors Connectors

P A R E N T

Connectors

P A R E N T

 The above connection diagram is an example of how to connect 4 water heaters together in

a Multi-Unit System. Up to 10 water heaters can be connected in this fashion.

 Make sure the “7-seg LED” of all the units’ computer boards display the unit #. The Multi-

Unit controller automatically allocates the unit # (1 to 10) to each water heater that is part of the Multi-unit system.

11 22

Lower bank of D ipswitch

1 2 34 5 6 7 8

OFF

Communication cab le

11 22

Lower bank of Di pswitch

1 2 34 5 6 7 8

OFF

Lower bank of D ipswitch

1 2 3 45 6 7 8

OFF

11 22

Lower bank of D ipswitch

1 2 34 5 6 7 8

OFF

 The dark squares indicate the direction the dipswitches should be set to.

Please refer to the Multi-Unit Controller manual for further instructions of the Multi-Unit system.

System connectors are on each unit’s

dipswitches

7-Seg LED

dipswitches

Cables use 18 gage wire and can be up to 250 ft. long all together.

computer board

Page 29

- 29 -

INITIAL OPERATION

CAUTION: IF YOU SMELL GAS:

 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. If the knob will not turn by hand, do not try to force it; call a qualified service technician. Forced repair may result in a fire or explosion due to gas leaks.

 Be sure to check next to the bottom of the unit because some gases are heavier than air

and may settle towards the floor.

 Check the GAS PRESSURE. Refer to p.16.  Do not try to light the burner manually. It is equipped with an electronic ignition device

which automatically lights the burner.

 Check for PROPER VENTING and COMBUSTIBLE AIR to the heater.  Purge the GAS and WATER LINES to remove any air pocket.  Do not use this water heater if any part has been submersed under water. Immediately call

a qualified service technician to inspect the water heater and to replace any damaged parts.

 Do not try to start the water heater.  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.

FOR YOUR SAFETY, READ BEFORE OPERATING:

 If you cannot reach your gas supplier, call the fire department.

1. Once the above checks

have been completed, please clean filter of any debris. Refer to p. 34 for instructions.

4. Fully open the manual

gas control valve installed.

2. Fully open the manual

water control valve on the water supply line.

5. Turn on the 120 volt 60 Hz

power supply to the water heater.

3. Open a hot water tap to

verify that water is flowing to that tap.

Then close the hot water tap.

6. Now you are ready to

enjoy hours of endless hot water.

Page 30

- 30 -

NORMAL OPERATION

The temperature

and the

3. Open a hot water tap.

When ON,

Lamp is

OFF

Lamp i

s ON

 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

1. NORMAL OPERATION

WITHOUT REMOTE CONTROLLER

Open a hot water tap.*

*If a remote controller installed, turn the remote controller ON by pressing the power ON/OFF button on the remote

controller and then set the temperature by pressing the HOT/COLD buttons before opening a hot water tap. The temperature is displayed when the remote controller is turned ON.

WITH REMOTE CONTROLLER INSTALLED: 9007603005 (TM-RE30) (Optional)

1. Press the power ON/OFF button. 2. Set temperature. (Example 110°Ｆ)

green LED is lit.

time will be displayed on the remote controller.

Mix cold water with the hot to get the correct temperature water.

2. NORMAL OPERATION

Close the hot water tap.

Temperatures available under the Default Mode

100 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175

Temperatures available under the High Temperature Mode

110 115 120 125 130 135 140 145 150 155 160 165 170 175 180 185

(unit:°F)

DO NOT set to 185°F if you use your water heater in recirculation system. Refer to p.33

Mix cold water with the hot if you need.

Lamp is ON

4. Close the hot water tap.

Lamp is OFF

WARNING

Hot Water temperatures over 125F (52ºC) can cause severe burns instantly or death from scalding.

 The outlet hot water temperature of the water heater is factory set at 120F (49ºC).  Feel the water temperature before bathing or showering.

Page 31

- 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.

1. Turn off power to the remote controller by pressing the “ON/OFF" button.

Lamp is OFF to indicate that power is off

2. Simultaneously press and hold both the “HOT” and “COLD” buttons for at least five seconds.

And then make sure “1” (or “0”) is displayed on remote controller. “1” is displayed for single units “0” is displayed for Easy-Link / Multi-unit Systems

3. Press the “TIME” button.

Make sure OFF and F1 are displayed on remote controller.

4. Press the “INFO” button. After, make sure “OFF” blinks.

Blink

5. Press the “HOT” button or the “COLD” button to set display to “on”.

Blink

6. Simultaneously press both the “BUZZER” button and the “INFO” button to fix the setting.

7. Make sure display is no longer blinking.

Not blinking

8. Press the “ON/OFF” button to finish the setting.

9. Turn on power to the remote controller by pressing the “ON/OFF” button again.

Lamp is ON

Page 32

- 32 -

FLOW

Lavatory Faucet

1.0

Shower

2.0 Kitchen Sink

1.5 Dishwasher

1.5 Washing Machine

 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.

 Based on the United States Department of

Energy method of testing water heater output, the water heater is rated for 474 gallons per hour (GPH) or 7.9 gallons per minute (GPM) for Natural Gas, and 504 GPH or 8.4 GPM for Liquid Propane, when raising the water temperature by 77F (from 58F to 135F).

 Refer to the chart on the right for typical

household plumbing fixture flow rates to determine what the water heater can do in a

Appliance / Use Flow Rate (GPM)

Bath Tub

Taken from UPC 2006

Household Flow Rates

4.0 – 10.0

household application.

FREEZE PROTECTION SYSTEM

 This unit comes equipped with heating blocks to protect it against damages associated with

freezing.

 For this freeze protection system to operate there has to be electrical power to the unit.

Damage to the heat exchanger caused by freezing temperatures due to power loss is not covered under the warranty. In cases where power losses can occur, consider the use of a backup power supply.

 The freeze protection system will activate when the surrounding and/or outside temperatures

drop below 36.5°F (2.5°C).

 In any areas subject to freezing temperatures, the manufacturer highly recommends

installing the unit indoors. In such an installation, freezing issues can only occur if cold air enters through the venting into the heat exchanger, whether by negative pressures within the installation location or by strong outside winds. It is the installer’s responsibility to be aware of these issues and take all preventative measures. The manufacturer will not be responsible for any damage to the heat exchanger as a result of freezing.

 The manufacturer also highly recommends the use of a back flow vent damper and/or

converting the water heater to a direct-vent unit to minimize the amount of cold air entering through the exhaust venting when the water heater is off.

 If you will not be using your heater for a long period of time:

1. Completely drain the unit of water. Refer to p. 34.

2. Disconnect power to your heater.

This will keep your unit from freezing and being damaged.

CAUTION: Only pipes within the water heater are protected by the freeze protection system. Any water pipes (hot or cold) located outside the unit will not be protected. Properly protect and insulate these pipes from freezing.

Page 33

- 33 -

The dark squares indicate the direction

To change

dipsw

itch

settings

Lower

bank of

Upper

bank of

TMP3

MODE

MODE MST

DIRE

TMP3 MST

TEMPERATURE SETTINGS

 There are 8 preset temperatures that you can select from by changing the dipswitch settings

on the computer board.

 The temperature has been preset at the factory to 120ºF (49ºC).  If you desire to change the set temperature with dipswitches, please refer to the diagram on

below. These temperatures are available: 100ºF, 115ºF, 120ºF, 135ºF, 145ºF, 155ºF, 165ºF, and 185ºF.

 If you desire a hot water temperature other than the 8 preset settings, please purchase the

optional temperature remote controller (part No. 9007603005 (TM-RE30)).

 With this optional remote controller you can set the temperature from 100ºF to 185ºF with

various increments.

 Please read the instructions carefully prior to installing the remote controller, as failure to do

so could damage the temperature controller and/or the water heater, which will void the warranty.

 Turn off the power supply to the heater before changing the dipswitch

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 185ºF if you use your water heater in a recirculation system.

This will cause damage to the heater and void the warranty.

dipswitches

7-Seg LED

for temperatures, locate the lower bank of dipswitches to the right of 7-Seg LED. DO NOT adjust the upper bank of dipswitches.

dipswitches

100°F

(38 ºC)

1 2 3 4 5 6 7 8

MODE

TMP2

TMP1

DIRE

OUT

P-ALARM

145°F

(63 ºC)

1 2 3 4 5 6 7 8

MODE

TMP2

TMP1

DIRE

OUT

P-ALARM

Temperature Settings

1 2 3 4 5 6 7 8

MODE

TMP2

TMP1

TMP3

1 2 3 4 5 6 7 8

MODE

TMP2

TMP1

TMP3

DIRE

MST

115°F

(46 ºC)

155°F

(68 ºC)

the dipswitches should be set to.

1 2 3 4 5 6 7 8

120°F

OUT

P-ALARM

MST

(49 ºC)

TMP2

OUT

TMP3

TMP1

DIRE

P-ALARM

135°F

(57 ºC)

1 2 3 4 5 6 7 8

MODE

TMP2

TMP1

DIRE

OUT

P-ALARM

MST

DEFAULT

1 2 3 4 5 6 7 8

165°F

OUT

P-ALARM

MST

(74 ºC)

TMP2

TMP1

DIRE

OUT

TMP3

P-ALARM

185°F

(85 ºC)

1 2 3 4 5 6 7 8

MODE

TMP2

TMP1

TMP3

OUT

P-ALARM

MST

Page 34

- 34 -

MAINTENANCE AND SERVICE

Blue flame

Red or Yellow

Flame

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.  The venting system should be checked annually for any leaks, corrosion, blockages or

damage.

 The burner should be checked annually for dust, lint, grease or dirt.  Keep the area around the water heater clear. Remove any combustible materials, gasoline or

any flammable vapors and liquids.

 In accordance with all local codes and common safety practices, Water discharged from the

pressure relief vale can cause severe burns instantly from scalding. DO NOT touch the pressure relief valve.

 If the relief valve discharges periodically, it may be due to thermal expansion in a closed

water supply system. Contact the water supplier or local plumbing inspector on how to correct this situation.

 Visual check of burner flames (see below) through the burner window in the burner assembly

located at the middle of the water heater.

Satisfactory

The manufacturer 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.

blowing up

Unsatisfactory

flame

Unsatisfactory

UNIT DRAINING and FILTER CLEANING

1. Close the manual gas shut off valve.

2. Turn off power to the unit, and then turn on again.

3. Wait 30 seconds, and then turn off power to the

unit, yet again.

4. Close the water shut off valve.

5. Open all hot water taps in the house. When the

residual water flow has ceased, close all hot water taps.

6. Have a bucket or pan to catch the water from the

unit’s drain plugs. Unscrew the drain plugs to drain all the water out of the unit.

7. Wait a few minutes to ensure all water has

completely drained from unit.

8. Clean the filter: Check the water filter located

within the cold inlet. With a tiny brush, clean the water filter of any debris which may have accumulated and reinsert the filter back into the cold water inlet.

9. Securely screw the drain plugs back into place.

Hand- tighten only.

Drain Plug

Gas Valve

Drain Plug with Filter

Water Valve

Page 35

- 35 -

GENERAL TROUBLESHOOTING

~ TEMPERATURE and AMOUNT OF HOT WATER ~

PROBLEM POSSIBLE SOLUTIONS

It takes long time to get hot water at the fixtures.

 The time it takes to deliver hot water from the water

heater to your fixtures depends on the length of piping between the two. The longer the distance or the bigger the pipes, the longer it will take to get hot water.

 If you would like to receive hot water to your fixtures

quicker, you may want to consider a hot water recirculation system. (p. 40)

The water is not hot enough.

The water is too hot. The hot water is not available when

a fixture is opened.

 Compare the flow and temperature. See the chart

on p. 51.

 Check cross plumbing between cold water lines

and hot water lines.

 Is the gas supply valve fully open? (p. 29)  Is the gas line sized properly? (p. 17)  Is the gas supply pressure enough? (p. 16)  Is the set temperature set too low? (p. 30,33)

 Is the set temperature set too high? (p. 30,33) 

Make sure the unit has 120 VAC / 60 Hz power supply.

 If you are using the remote controller, is the power

button turned on? (p. 30)

 Is the gas supply valve fully open? (p. 29)  Is the water supply valve fully open? (p. 29)  Is the filter on cold water inlet clean? (p. 34)  Is the hot water fixture sufficiently open to draw at

least 0.5 GPM through the water heater? (p. 30)

 Is the unit frozen? 

Is there enough gas in the tank / cylinder? (for Propane models)

The hot water gets cold and stays cold.

Fluctuation in hot water temperature.

 Is the flow rate enough to keep the water heater

running? (p. 30)

 If there is a recirculation system installed, does the

recirculation line have enough check valves?

 Is the gas supply valve fully open? (p. 29)  Is the filter on cold water inlet clean? (p. 34)  Are the fixtures clean of debris and obstructions?

 Is the filter on cold water inlet clean? (p. 34)  Is the gas line sized properly? (p. 17)  Is the supply gas pressure enough? (p. 16)  Check for cross connection between cold water

lines and hot water lines.

Page 36

- 36 -

~ WATER HEATER

PROBLEM POSSIBLE SOLUTIONS

~ REMOTE CONTROLLER:

9007606005

~ EASY

LINK SYSTEM

Unit does not ignite when water goes through the unit.

 Is the flow rate over 0.5 GPM? (p. 30)  Check for the filter on cold water inlet. (p. 34)  Check for reverse connection and cross connection.  If you use the remote controller, is the power button

turned on? (p. 30)

The fan motor is still spinning after operation has stopped.

Abnormal sounds come from the unit.

(TM-RE30) (OPTIONAL) ~

PROBLEM POSSIBLE SOLUTIONS

Remote controller does not display anything when the power button is turned on.

An ERROR code is displayed.

 This is normal. After operation has stopped, the fan

motor keeps running for 35 seconds in order to reignite quickly, as well as push all exhaust gas out of the flue.

 Contact the manufacturer at 1-877-737-2840.

Press the ON/OFF button. If the lamp lights up ⇒  This is normal. When the unit has not operated for

five minutes or more, the display turns off to converse energy.

If the lamp does not light ⇒

 Make sure the unit gets power supply. 

Make sure the connection to the unit is correct.(p. 21)

 Please see the p. 37.

PROBLEM POSSIBLE SOLUTIONS

How are the unit numbers assigned?

 For an Easy-Link system, other than the Parent Unit

(which is always labeled #1), all the other units (the Child units) are numbered randomly.

 To check which numbers are assigned to which

units, push the button on the computer board of a unit as shown below. The unit number will be displayed on the 7-Seg LED.

Unit# display button

7-Seg LED

Page 37

- 37 -

TROUBLESHOOTING – ERROR CODES

Error

ink OR Multi

unit system

Remote

The top red lamp will

The mid red lamp will

 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.

 Consult the following chart for the cause of each error code.

7-Seg LED

flash when the right combustion section has an error code.

flash when the left combustion section has an error code.

Remote controller (Optional)

Code

031 Incorrect dipswitch setting 391 Air-fuel Ratio Rod failure 661 101 Warning for 991 error code 441 Flow Sensor Failure 681 Abnormal External Fan motor

111 Ignition failure 510 Abnormal Main Gas Valve 701 Computer board Fault 121 Loss of flame 551

311 Output thermistor failure 611 Fan Motor Fault 741

321 Inlet thermistor failure 631 Abnormal External Pump 761

331 Mixing thermistor failure 651

Malfunction description

Code

Single Unit

 The 7-Seg LED displays the 3-digit error codes one

digit at a time. The remote controller (if installed) displays the whole 3-digit error code at once.

 When the right and/or left combustion section has an

error code, the red lamp next to the 7-Seg LED on the central computer board will flash to indicate which combustion section has the error code. Refer to the above picture.

Example: If your unit has the “321” error code (inlet thermistor),

 The 7-Seg LED, will flash the 3-digit error code one

digit at a time. The 7-Seg LED will display “3”... “2”... “1”, and then repeat the 3 digits.

 The remote controller, however, will display “321”

on its screen, in its entirety.

Unit #1

PARENT

“3..2..1..0..2”

“232”

Unit #2 CHILD

“3..2..1”

Controler

Unit #3 CHILD

Malfunction description

Abnormal Gas Solenoid

Water Control Valve Fault

(Flow Adjustment function)

Valve

Easy-Link

 The 7-Seg LED on the PARENT unit displays a 5-digit

number to signify which unit in the Easy-Link system has the error, and what the error code is. The 7-Seg LED displays the number one digit at a time.

 The remote controller (if installed) displays a 3-digit

number which also signifies which unit has the error, and what the error code is.

 The unit that has the error in an Easy-Link system will

display the error code on its 7-Seg LED in exactly the same way as if it were only a Single Unit.

 When the right and/or left combustion section has an

error code, the red lamp next to the 7-Seg LED on the central computer board will flash to indicate which combustion section has the error code. Refer to the above picture.

Example:

Unit #4

CHILD

If Unit #2 has the “321” error code (inlet thermistor),

 The 7-Seg LED on the PARENT unit will display “3”...

“2”… “1”… “0”… “2”, displaying only one digit at a time. The first 3 numbers indicate the error code. The last two numbers indicate that Unit #2 has the error.

 The remote controller, however, will display “232” on

its screen in its entirety. The first “2” indicates that Unit #2 has the error. The “32” indicates the first two digits of the “321” error code.

 The 7-Seg LED on Unit #2 will display “3”…. “2”…. “1”,

just like in the Single Unit example.

Code

721 False Flame Detection

991 Imperfect combustion

Malfunction description

Water Control Valve Fault

(Bypass function)

Miscommunication between water

heater and remote controller

Miscommunication in Easy-

Page 38

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. Do not try to light the burner by hand.

B. BEFORE OPERATING smell all around the water heater area for evidence of leaking

gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.

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.

C. Use only your hand to turn the gas valve knob. Never use tools. If the knob will not

turn by hand, don't try to repair it. Call a qualified service technician. Forced or attempted repair may result in a fire of explosion.

D. Do not use this water heater if any part has been under water. Immediately call a

qualified service technician to inspect the water heater and to replace any damaged parts.

OPERATING INSTRUCTIONS

1. STOP! Read the safety information above or in the Owners Manual.

2. Turn off all electric power to the water heater.

3. Do not attempt to light the burner by hand.

4. Turn the manual gas valve located on the outside of the unit clockwise ↻ to the off position.

5. Wait five (5) minutes to clear out any gas. If you then smell gas. STOP! Follow "B" in the safety information above on this label. If you don't smell gas, go to next step.

6. Turn the manual gas valve located on the outside of the unit counter clockwise ↺ to the ON position.

7. Turn on all electrical power to the water heater.

8. If the water heater will not operate, follow the instructions “to Turn Off Gas to water heater" and Call your service technician or gas supplier.

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.

- 38 -

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:

1. Far away from heater

2. In approved containers

3. Tightly closed

4. Out of children's reach

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 retailer or manufacturer.

Vapors:

1. Cannot be seen

2. Vapors are heavier than air

3. Go a long way on the floor

4. Can be carried from other rooms to the main burner by air currents

WARNING

The outlet hot water temperature of the water heater is factory set at 120 ºF (49ºC). 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. Do not leave children or an infirm person in the bath unsupervised.

DANGER

Hot Water Heater temperature over 125 ºF (52ºC) can cause severe burns instantly or death from scalding. Children, disabled and elderly are at the highest risk of being scalded. Feel water temperature before bathing or showering. Temperature limiting valves are available. Ask a professional person.

WARNING: California Proposition 65 lists chemical substances known to the state to cause cancer, birth defects, death, serious illness or other reproductive harm. This product may contain such substances, be their origin from fuel combustion (gas, oil) or components of the product itself.

- 39 -

Page 40

- 40 -

Check valve

Air

separator

Recirculation

pump

Hot water outlet to

fixtures

Air Vent

Unions

Gas supply

Ball valves

Expansion tank

Y-Strainer

Cold water

inlet

APPLICATIONS

* The

recirculation pump is to be controlled by:

 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.

 Toxic chemicals used in boiler treatments such as alcohol, glycerol and glycol groups

must not be introduced into the system if the system incorporates an open-loop potable water system.

 Toxic chemicals used in boiler treatments such as alcohol, glycerol and glycol group

must not be introduced into the system when used for open loop potable water and space heating.

 The water heater 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.

 When the system requires water for space heating at temperatures higher than required

for other uses, a means such as a mixing valve shall be installed to temper the water for those other uses in order to reduce scald hazard potential.

 Water temperature over 125 F (52ºC) can cause severe burns instantly or death from

scalds.

 Chemicals such as diluted Glycol can be used for radiant floor, Hydro/fan coil air or

Baseboard heating only. The diluted solution of glycol must contain between 25 and 55% of Glycol. Be aware that in closed-loop glycol systems, low pressure in the heat exchanger can cause low-temperature boiling, resulting in excessive noise and damage to the water heater. Consult with the glycol maker for specifications prior to use.

Space Heating Applications

WARNING

-Dual-set aquastat (recommended w/timer) OR

-“Pump Control Connections”. Refer to p.22.

* The recirculation pump is to provide no less than 2 GPM and no more than 4 GPM through each activated unit in the system.

This is a concept drawing only.

Re-circulation:

Hot Wate r Outl et

Cold Wate r Inle t

Gas Inle t

Page 41

- 41 -

The circulation pump is to provide no less

than 2 GPM

and no

more than 4 GPM

throug

h eac

h activated

Dual-purpose hot water heating (Domestic and Space Heating):

Diagramatic Layout of Radiant Heating and

Domestic Water Heater Per Mass. Code

An approved Pressure Only

An approved Pressure Only Relied

Thermostatic Mixing Valve

Heating Coil

(used with air-handler)

**Maximum allowable distance of 50-Ft. from water heater and heating panel

Apply Correct Thermal

Expansion

Tank-Size Per Application

Thermometer

Tempered Water To

House

Thermometer

Shut-Off Valves

Pump (Must Be Sized Properly

With Each Application). Pump Shall Run 60 Seconds Every 6 Hours

Shut-Off Valve

Pressure Gauge

Check Valves

Cold Inlet

Check Valve Will

Have 1/8" Hole in

Check, As Per

Mass. Code

Atmospheric Vacuum Breaker

Check Valve

Relief Valve, Tie to Location

Valve, Tie to Location approved By

approved by Local Codes and

Local Codes and Must Meet BTU

Must Meet BTU Rating of Takagi

Rating of water heater Model Used

Model Used

5" Gas Exhaust Vent (Discharge Must Comply with Local and State Codes). Can Not Be Common Vented with Other Appliances

Takagi

Hot

Cold Water Inlet

Water

Filter

Unions

Gas Inlet

Water Outlet

Drain Plug

T-Handle Gas

Shut-Off Valve

120 VAC Switch or Outlet

unit in the system.

Priority Control Devices such as a flow switch, an Aquastat or other electronic controller can be used to prioritize the domestic water system over the heating system.

Warning: Follow all local codes, or in the absence of local codes, follow the most recent edition of the National Standard Code, ANSI Z21. 10.3.

Warning: This illustration is a concept design only. The reference to the 1/8th hole in check is only for the State of Massachusetts. There are a wide variety of variations to the application of controls and equipment presented. Designers must add all necessary safety and auxiliary equipment to conform to code requirements and design practice. For more details, contact the manufacturer.

Page 42

- 42 -

ADDITIONAL CLEARANCES

Exhaust termination

1ft.

2ft.

Inside

3ft.

1ft.

Inside

2ft.

For multiple sidewall exhaust

For

Direct

Vent

sidewall

For multipl

e-unit,

irect-v

ent

Exhaust

For multiple

unit rooftop terminations (whether for standard indoor or

Direct

away from a wall or surface.

Exhaust and/or

Direct

Vent

Exhaust

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

corner

terminations (e.g. multi-unit systems), an exhaust termination must be at least 1 ft. away from another exhaust termination. An exhaust termination must also be at least 2 ft. away from an inside corner (if the adjacent wall is less than 2 ft. of length, the minimum required distance away from the inside corner will be equal to the length of the wall).

2ft.

termination

Air supply inlet

terminations that use two separate penetrations for the intake and exhaust, distance the intake and exhaust terminations at least 3 ft. away from each other, no matter the orientation.

For rooftop terminations

Direct-Vent termination

sidewall terminations that combine the intake and exhaust into a single penetration, space each direct-vent termination at least 1 ft. away from each other, no matter the orientation. A direct-vent termination must also be at least 2 ft. away from an inside corner (if the adjacent wall is less than 2 ft. of length, the minimum required distance away from the inside corner will be equal to the length of the wall).

2ft.

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.

A: in accordance with local codes

Vent installations) space all exhaust and intake terminations in accordance with local codes. An exhaust termination must be spaced from a wall or surface in accordance with local codes as well. In the absence of such a code, an exhaust termination must be a horizontal distance of at least 2 ft.

Air intake

Exhaust termination

Air intake

termination

Page 43

- 43 -

OPTIONAL ITEMS

Temperature Remote Controller

9007603005

2. Multi system controller

9007675005

3. Vent Damper

: 9007679005

(TM-BF50)

Vent Cap

9007677005

(TM-VC50)

5. Direct

Vent

Kit

: 9007669005

(TM-DV50)

(TM-RE30)

The Temperature Remote Controller has two functions. It allows the output temperature from the water heater to be adjusted within the range of 100 °F to 185 °F, and it also

works as a diagnostic tool that will give a concise error code whenever there is a problem with the unit. The temperature options are 100°F, 105°F, 110°F, 115°F, 120°F, 125°F, 130°F, 135°F, 140°F, 145°F, 150°F, 155°F, 160°F, 165°F, 170°F, 175°F, 180°F and 185°F. See the trouble shooting section for information on possible error codes.

The Vent Damper prevents the backflow of air through the exhaust vent. This helps prevent harmful exhaust gases from entering the home, as well as helping to prevent the unit from freezing in areas where cold air can be blown or drawn into the exhaust system. Install this vent

damper in accordance with the manufacturer’s installation instructions, and any applicable codes.

This kit can be used convert the 910 (T-M50) from a conventional vent system to a direct-vent (or sealed combustion) system. This is a CSA tested conversion kit. Install this conversion kit in

accordance with the manufacturer’s installation instructions and any applicable codes.

(TM-MC01)

The Multi- system controller can control a maximum of 10 water heaters, from 15,000 BTU to 3,800,000 BTU. It also works as a diagnostic tool that will give a concise error code whenever there is a problem with the unit. Usage of this controller requires having the 9007603005 (TM-RE30)

remote controller.

The Vent Cap is for outdoor installation with the 910 (T-M50) water heater. The cap is installed on the top of the unit, instead

of connecting an exhaust vent pipe. The cap will prevent any debris that might be in the environment from entering the unit and causing damage or a fire hazard, as well as preventing rain or other weather from entering the unit.

6. Pipe cover: 9007673005 (TM-PC50)

The Pipe cover protects the plumbing pipes to the 910 (TM50) from unexpected adjustments. This pipe cover is fixed to the bottom of the water heater, which hides the plumbing and improves the visual aspects of the whole

installation for the water heater.

Page 44

- 44 -

COMPONENTS DIAGRAM

Case assembly

Computer board assembly

The 910 (T-M50) and the 910 ASME (T-M50 ASME) models share the same components.

701

715

418 703

707 7 06

708

709

704

715

709

418 703

416705

704

707 7 06

710

719

718

708

702

113

712

713

711

714

701

113

719

113

113 1 13 716

711

717

723

722



708

113

416705

721 714

720

113

Page 45

- 45 -

Burner assembly

The 910 (T-M50) and the 910 ASME (T-M50 ASME) models share the same components.

705

114

115

116

113

103

109

707

108

112

104

107

106

113

111

105

110

113

101

113

117

113

707

102

707

113

117

705

113

115

116

707

102

121

707

119

118

707

114

707

119

118

109

103

707

108

112

104

107

106

113

111

105

110

113

101

113

121

123

124

126

125

120

122

Page 46

- 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)

444

127

130

129

137

446

447

137

405

404

135

406

403

446

136

407

402

445

401

133

113

405

404

406

131

403

128

407

402

401

133

134

417

132

417

408

409

410

412

113

411

413

415

414

139

113

138

408

409

410

412

416

113

411

413

415

414

113

416

139

138

Page 47

Water way assembly

910 (T-M50)

418

411

419

411

910 ASME (T-M50 ASME)

411

418

419

411

419

420

422

421

419

411

424

406

407

419

411

435

419

449

419

407

448

427

430

411425

441

442

443

426

411

420

428

419

411

422

421

419

411

424

406

407

426

427

419

411

425

406

422

439

440

411

434

411

419

435

418

411

419

411

419

420

421

411

419

430

419

407

423

427

406

430

411425

441

442

443

436

437

411

407

113

438

425

411

427

419

425

429

450

406

407

406

427

419

426

427

419

411

425

422

439

440

434

433

426

411

419

411

407

430

411

418

419

411

425

429

431

406

419

432

411

427

419

420

421

411

419

407

406

425

424

429

436

437

113

438

425

433

425

451

424

429

- 47 -

Page 48

- 48 -

PARTS LIST

Item# Description

001 002 003 004 005 006 007 008 009 010 011 012 013

101 102 103 104 105 106 107 108 109 110 111 112 113 114

115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135

Manifold assembly with gas valve assembly LP

Manifold assembly with gas valve assembly NA

Case assembly

Brackets

Screw M4X10 (w/washer)

Screw M4X10 (Coated)

Back guard panel

Power supply code assembly

Junction box

Chamber fixing plate

Rubber bush

Exhaust fixing plate

Front cover

Air blockage plate

Screw M4X12 (w/washer)

Burner assembly

Igniter Flame rod Igniter rod

Damper

Rod cap

Burner window

Rod holder gasket

Rod holder

Burner holder gasket

High voltage igniter cable

Pan screw M4X8

Screw M4X10

Manifold gasket A Manifold gasket B

Igniter plate

Gas connection plate

Pan screw M4X10

O-ring P20 NBR (Black)

Gas pipe left

Gas pipe right

O-ring P18 NBR (Black)

Gas inlet

Hex head screw M4x8

Pan screw M4X6 (w/washer)

Exhaust connecter

Exhaust combining box

Silicon ring Exhaust gasket A Exhaust gasket B

Case beam

Exhaust auxiliary plate

Duct

Duct cover

Part#

910 models T-M50 models

319143-265 319143-012 319143-325 319143-026 319143-237 319143-277 319143-014 319143-230 319143-334 319143-236 319143-262 319143-246 319143-025

319143-308 319143-052 319143-035 319143-037 319143-192 319143-038 319143-033 319143-034 319143-036 319143-032 319143-039 319143-059 319143-060 319143-263 319143-264 319143-044 319143-045 319143-051 319143-337 319143-062 319143-057 319143-257 319143-253 319143-350 319143-250 319143-063 319143-090 319143-261 319143-276 319143-206 319143-238 319143-239 319143-249 319143-275 319143-260 319143-258

EM305

EM335 EW001 EW002

EM264

EM333

EKJ64 EM255 EX00B EM263 EM301 EM278

EW000

EM445 EKN74 EKK0E EKK0F EKK1P EKN61 EKK2V

EKK2W

EKK32

EKK0G EKK2M EW00D

EW003

EM302 EM303 EKK2Y EKK2K EKK1B

EX00J

EW006

EK042 EM293 EM289 EZP18 EM284

EW005 EW00L

EM300 EM331

EKK3G

EM266 EM267 EM282 EM330 EM299 EM294

Page 49

- 49 -

Item# Description

136 137 138 139 140

401

Heat exchanger assembly for 910 (T-M50)

Freeze protection thermostat

402 403 404 405 406 407 408 409 411 412

Pan Screw M4X12 (w/washer) 413 414 415 416 417 418 419 420 421 422 423

Left cold pipe for 910 (T-M50) 424 425 426 427 428

Left hot pipe for 910 (T-M50) 429 430 431 432

Right hot pipe for 910 (T-M50)

Right cold pipe for 910 (T-M50) 433 434 435 436 437 438 439 440 441 442 443 444 445

Heat exchanger assembly for 910 ASME (T-M50 ASME)

Connection pipe for 910 ASME (T-M50 ASME)

446

Duct gasket

Screw M4X10

Fan damper

Screw M3X6

Overheat-cut-off-fuse

Hi-limit switch

Screw M3X6

Output thermistor

Fastener "4-11"

O-ring P4 FKM

Pipe heater 122

Heater fixing plate

O-ring P16 FKM

Fan motor fixing plate

Pressure port

Urethane tube

Fan motor Fuse fixing plate 18 Water control valve

Fastener "16AG"

O-ring P15 FKM

Flow sensor

Connecting pipe

Inlet thermistor

Heater 502 Heater 101

Heater fixing plate 16

Heater fixing plate 20

Mixing thermistor

Heater plate

Water inlet

Filter plug

O-ring P25 FKM

Water inlet filter

O-ring JASO#1021 FKM

Water outlet

Screw M4X6

Heater 117

Outlet drain plug

O-ring P6 FKM

O-ring P18 FKM

Part#

910 models T-M50 models

319143-240 319143-060 319143-147 319143-330 319143-252

319143-268 319143-149 319143-095 319143-087 319143-096 319143-097 319143-082 319143-224 319143-088 319143-083 319143-061 319143-229 319143-042 319143-344 319143-043 319143-066 319143-086 319143-077 319143-091 319143-092 319143-251 319143-254 319143-085 319143-333 319143-068 319143-125 319143-273 319143-124 319143-190 319143-256 319143-255 319143-076 319143-259 319143-070 319143-071 319143-072 319143-073 319143-269 319143-328 319143-223 319143-199 319143-080 319143-270 319143-271 319143-349

EM268

EW003

EK270

EW00B

EM286 EM308

EK333

EKN34

EW00A

EKK2T EKH30 EZM04 EKN86 EKK27 EZM16

EW00H

EM252

EKK2D

EX019 EKK25 EKK26 EKH32 EX01H EZM15 EKH33 EM285 EM290 EKK38

EX001

EX002

EK031 EM328 EKH38 EKK1A EM292 EM291

EX021 EM295 EM222 EZM25

EX006 EZN21 EM309

EW009

EKN67 EKK2E EZM06 EM323 EM326 EZM18

Page 50

- 50 -

Item# Description

447 448 449 450 451

701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723

Connecting pipe for 910 ASME (T-M50 ASME)

Left cold pipe for 910 ASME (T-M50 ASME)

Left hot pipe for 910 ASME (T-M50 ASME)

Right hot pipe for 910 ASME (T-M50 ASME)

Right cold pipe for 910 ASME (T-M50 ASME)

Right and left computer board

Central computer board

PV-FS wire

Thermistor connecting wire

Flame rod wire

Igniter wire

Gas valve wire

AC100V wire

Right and left computer board cover

Central computer board cover

Multi communication wire

Left communication wire

Right communication wire

Remote controller terminal

Wire Cramp

Left PCB fixing plate

Right PCB fixing plate

Transformer

Screw M4X12

Ground fault circuit interrupter

Screw M3X12

Surge box

Surge connecting wire

Part#

910 models T-M50 models

319143-278 319143-310 319143-313 319143-312 319143-311

319143-266 319143-267 319143-232 319143-233 319143-243 319143-231 319143-248 319143-245 319143-183 319143-274 319143-247 319143-234 319143-235 319143-244 319143-048 319143-241 319143-242 319143-127 319143-343 319143-227 319143-331 319143-284 319143-215

EM370 EM456 EM459 EM458 EM457

EM306 EM307 EM258 EM260 EM271 EM257 EM280 EM277 EKH43 EM329 EM279 EM261 EM262 EM273 EM167 EM269 EM270 EM296

EX013 EM207

EW01A

EM385

EKK4U

Page 51

(1)

(2)

No Pump Control (24 hr.)

No Recirculation

(2)

(4)

(3)

OUTPUT TEMPERATURE CHART

Out Put Temperature vs. GPM (Max. 14.5 GPM) with Various Ground Water Temperature

Correct Gas pipe size can be expect this chart

16.0

14.0

12.0

10.0

8.0

6.0

Out Put Hot Water GPM

4.0

2.0

0.0 100 105 110 115 120 125 130 135 140 150 160 165 170 175 180 185

10.1 9.3 8.7 8.1 7.6 7.1 6.7 6.4 6.1 5.5 5.1 4.9 4.7 4.5 4.3 4.2

40 F

12.1 11.0 10.1 9.3 8.7 8.1 7.6 7.1 6.7 6.1 5.5 5.3 5.1 4.9 4.7 4.5

50 F

14.5 13.5 12.1 11.0 10.1 9.3 8.7 8.1 7.6 6.7 6.1 5.8 5.5 5.3 5.1 4.9

60 F

14.5 14.5 14.5 13.5 12.1 11.0 10.1 9.3 8.7 7.6 6.7 6.4 6.1 5.8 5.5 5.3

70 F

Out put Hot Water Temperature

40 F 50 F 60 F 70 F

*When the set temperature is 150ºF or higher, maximum flow rate is limited to 10.6 GPM.

LIMITED WARRANTY

1. 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, and it is not transferable. 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 THE MANUFACTURER BE LIABLE FOR ANY SPECIAL, INCIDENTAL, OR INDIRECT CONSEQUENTIAL DAMAGES INCLUDING PROPERTY DAMAGE, PERSONAL DAMAGES, LOSS OF USE, OR INCONVENIENCE. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.

2. Warranty for models: 910 (T-M50), 910 ASME (T-M50 ASME)

Application HX

No Recirculation

Single Family

Domestic Hot

Water

w/ Standard

Recirculation

On-Demand Recirculation

Aquastat Control

Pump Control

Timer Only

Parts Labor

3 3

[Unit: Year]

(3)

Commercial

Multi-Family

Domestic Hot

Water

Heating

All Types 5 5 1

On-Demand Recirculation

w/ Standard

Recirculation

Aquastat Control

Pump Control

Timer Only

No Pump Control (24 hr.)

- 51 -

5 5

3 3

(3)

Page 52

- 52 -

(1) Heat exchanger

ATM50

(2) An on-demand recirculation system is a system that utilizes either a push-button or other type of manual activation

(as opposed to automatic activation with a temperature sensor or timer) to activate the circulation pump. An ondemand recirculation system can use either the existing cold water line as the return line or have its own dedicated return line.

(3) Limited Labor Coverage

 The manufacturer will provide for reasonable labor charges associated with warranty repairs or

replacements within one (1) year from the date of purchase. The manufacturer will only pay directly to the service provider.

 Warranty service must be performed by an authorized Service Representative. A list of authorized Service

Representatives is available upon request.

 All warranty claims and warranty service must be authorized and approved by the manufacturer.

(4) Includes dual-purpose applications (combination heating and domestic).

3. Repair, Replacement or Refund:

The manufacturer or its authorized Service Representative will, at its sole discretion, repair or replace any failed or defective mechanical or electrical parts, or components thereof, or, if the manufacturer or its authorized Service Representative cannot replace said parts, and repair is not commercially practicable, the manufacturer or its authorized Service Representative will refund the purchase price. The manufacturer or its authorized Service Representative may, at its sole discretion, use new, refurbished or reconditioned parts.

4. Limitation on Duration of Implied Warranties:

ANY IMPLIED WARRANTIES ARISING UNDER STATE LAW, INCLUDING THE IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY, SHALL IN NO EVENT EXTEND PAST THE EXPIRATION OF ANY WARRANTY PERIOD HEREUNDER. SOME STATES DO NO ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.

5. THIS WARRANTY WILL NOT COVER THE FOLLOWING:

 Any product that is not installed by a licensed plumber, gas installer, or contractor.  Damages due to accidents, abuse, misuse, improper installation, misapplication, or incorrect sizing.  Damages due to fires, flooding, freezing, electrical surges, or any Acts of God.  Damages due to unauthorized alterations, attachments, and/or repairs.  Damages due to a lack of maintenance (e.g. water filter, water treatment system, vent blockage, etc.) .  Any product installed in an improper environment (e.g. corrosive, dusty, chemically contaminated, excessive lint, etc.).  Freeze damage that occurs without taking proper preventive measures as described in the installation manual.  Condensate damage due to improperly installed or lack of a condensate trap (drain).  Any product not installed in compliance with all applicable local & state codes, ordinances, and good trade practices.  Any product sold to or installed in areas outside of the fifty states (and the District of Columbia) of the United States of

America and Canada.

 Any product installed in applications that cause the water heater to activate more than 300 times per day (this averages

to an activation every 5 minutes in a 24-hour period).

 Any failures that are not due to defects in materials or workmanship (mechanical and/or electrical parts).  Damages due to improper installation:

 Gas: incorrect gas pipe sizing, incorrect gas meter sizing, incorrect gas type, and/or gas pressures that fall outside

the product’s specified range.

 Water: incorrect water pipe sizing, water pressures that fall outside the product’s specified range, recirculation flow

rates that fall outside the product’s specified range (air removal), and/or lack of proper methods of air removal in a closed-loop, circulation system (see installation manual for details).

 Electric: supply power voltages that fall outside the product’s specified range.

 Damages due to water quality:

 Introduction of liquids other than potable water or potable water / glycol mixtures into the product.  Introduction of pool water, spa water, or any chemically treated water into the product.  Introduction of hard water measuring more than 7 grains per gallon (120 ppm) for single family domestic

applications or more than 4 grains per gallon (70 ppm) for all other types of applications into the product.

 Introduction of untreated or poorly treated well water into the product.  Introduction of water with pH levels less than 6.5 and greater than 8.5 into the product.

63V051-2

A.O. Smith ATIO-910-AN, ATIO-910-AP, ATIO-910-N, ATIO-910-P Technical Documents

Specifications and Main Features

Frequently Asked Questions

User Manual