MOBIUS Water Heater Gas Fired, Instantaneous, Tankless Water

MOBIUS Water Heater   Gas Fired, Instantaneous, Tankless Water
MOBIUS Water Heater

Takagi Industrial Co. USA, Inc.
Installation and Operation Instruction
MODEL T - M1
MOBIUS Water Heater

Gas Fired, Instantaneous, Tankless
Water Heater
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FEATURES
ENDLESS HOT WATER SUPPLY
ON-DEMAND HEATING
PILOT-LESS SYSTEM
COMPACT, SPACE SAVING
COMPUTERIZED CONTROLS
COMPUTERIZED SAFETY DEVICES
MULTI-UNIT INSTALLATION READY
Store these instructions near to the water heater for reference purposes.
TAKAGI INDUSTRIAL CO. USA Inc.
6 Goddard, Irvine, CA 92618
Tel. (949) 453 - 8388, FAX. (949) 453-8498
E-Mail: Takagi@takagi-usa.com
http://www.takagi-usa.com
1
FOR YOUR SAFETY - READ BEFORE OPERATING
FOR YOUR SAFETY - This product must be installed and serviced by a professional
service trained technician. Installation and/or operation could create carbon monoxide
gas and other dangerous gases, which can cause serious injury or death. Improper
installation and/or operation will void the warranty.
WARNING: If the information in this manual is not followed exactly, a fire or
explosion may result, causing property damage, personal injury or death.
•
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 light any appliance.
Do not touch any electrical 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.
A trained technician, qualified installer, or service agency, must perform installation
and service.
WARNING: To install this unit correctly, you must follow the procedures in this manual.
If you do not do this, the warranty offered by Takagi Industrial Co. USA, Inc. will be
voided.
Do not make any changes to the water heater, or to its gas controls, gas orifices,
wiring or draft. Any modifications may void the warranty. If the unit must be modified
because of special conditions, talk with a factory representative before beginning any
changes.
2
SPECIFICATIONS
CONTENTS
Introduction
For Your Safety
Operation
…………. 4
…………. 4
…………. 6
•
•
•
•
…………. 6
…………. 7
…………. 7
…………. 7
General
Temperature
Freeze Prevent Device
Winterizing
Installation
…………. 8
•
•
Min. 25,000 Btu
Max. 235,000 Btu
LPG Input
Min. 25,000 Btu
Max. 225,000 Btu
Gas Connection
¾” NPT
Water Connection
¾” NPT
Water Pressure
• General Instruction
…………. 8
• Outdoor Installation
…………. 9
• Indoor Installation
…………. 11
• Combustible Air Supply …………..11
• Venting Instructions
…………..12
• Vent Connections
…………..12
• Vent Termination
…………..13
• Gas Supply and pipe …………. 14
• Water Connections
…………. 15
• T & P Relief Valve
…………. 16
• Electrical Connection …………. 17
• Wiring
…………. 18
•
Starting The System
…………. 19
Operating Instructions
…………..19
Maintenance and Service …………. 24
Cleaning the Heat Exchanger ……… 25
Trouble Shooting
…………. 25
Trouble Shooting Flow Chart……….. 26
Part Diagram
…………. 30
Part List
…………. 34
MOBIUS Water Heater Application….36
Temperature Chart
…………. 38
•
•
Natural Gas Input
Min. 15 psi
Max. 150 psi
Natural Gas Pressure Inlet Min. 5” WC
Max. 10.5” WC
LP Gas Pressure Inlet
Manifold Pressure
Weight
Dimensions
Ignition
Electrical Supply
Min. 11” WC
Max. 14” WC
Natural 2.2” WC
Propane 2.7” WC
70 lbs.
24”x18”x 9”
Electronic Ignition
AC 120 V
***
Inlet gas pressure must be within above value.
High altitude, before install in areas over 4,500 feet above sea level. Contact the
manufacturer for a high altitude.
Check the rating plate to insure this product matches your specifications.
Takagi - USA is constantly improving our products, therefore specifications are subject to
change without prior notice.
2
INTRODUCTION
This manual provides information necessary for the installation, operation, and maintenance
of the MOBIUS Model T-M1 water heater.
The model designation is listed on the rating plate, which is attached to the front of the water
heater. Please read all application and installation procedures completely before doing the
installation. If you have any problems or questions regarding this equipment, consult the
Takagi Industrial Co. USA, Inc. or local factory representative. Experience has shown that
most operating problems are caused by improper installation.
FOR YOUR SAFETY
PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW IT FOR YOUR SAFETY.
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.
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.
3. Carefully plan where to install the MOBIUS Water Heater. Ensure that the heater will have
enough combustible air, proper ventilation, and will be located where water leakage will
not cause damage. If there is a possibility of water damage install a suitable drain pan
under the unit, but make sure that it does not restrict combustible airflow.
4. Check the rating plate for the correct gas type, gas pressure, water pressure, and
electrical rating. If this unit does not match your requirements, do not install.
RATING PLATE
5. If any problem should occur, turn off all hot water taps and turn off the gas. Call a trained
technician, the Gas Company, or the manufacturer.
6. WARNING: Do not disconnect the electrical supply if the ambient temperatures will be
near freezing. The Freeze Prevention Device will only work if the unit has proper electrical
power. The Freeze Prevention Device is rated for temperatures down to 5ºF (-15ºC) in a
wind free environment. Wind chill factor can cause the MOBIUS Water Heater to freeze
and be damaged at temperatures above 5ºF (-15ºC). Refer to the section on Winterizing
and the Freeze Prevention Device for more information. Weather related damage to the
heat exchanger will not be covered under the warranty.
7. WARNING: Before bathing or showering always check the water temperature. Do not
leave children or the infirm without supervision in a shower or bath. The water
temperature is factory set at 140ºF (60ºC) to maximize the amount of hot water available
without an optional temperature remote controller. Water temperatures over 125ºF can
cause severe burns instantly, or death from scalds.
8. WARNING: Do not use this appliance if any part has been underwater. Immediately call a
certified and trained technician to inspect and service the unit if necessary.
9. WARNING: Do not store or use gasoline or other flammable vapors and liquids in the
vicinity of this or any other appliance.
10. WARNING: Do not reverse the water and gas connections, this will damage your heater
and can cause severe injury or death from scalds. Follow the diagram below when
installing the MOBIUS water heater.
T&P Valve
HOT
COLD
GAS
OPERATION
GENERAL
The MOBIUS Water Heater is an instantaneous, tankless water heater designed to supply an
entire household or commercial hot water utilizing total efficiency. The principle behind the
MOBIUS Water Heater is simple. Once a hot water tap is opened, water flows through the
MOBIUS Water heater. The water flow sensor automatically commands the computer to
electronically ignite the burners and the computer monitors the water temperature, water flow
rate, and gas flow the insure you get the right amount of hot water with right temperature.
While gas is being burned, the “fire on” lamp will be lit. Computer will modulate gas supply to
gas valve and modulate water flow for steady out put hot water temperature.
0.75 gallons per minute is required to turn the burners on, but after the burners are ignited,
the flow rate can drop to 0.6 gallons per minute to maintain and keep the water heater on. As
long as water, gas and electricity are supplied, there will be an endless flow of hot water. The
water heater will turn on when a tap is opened, and it will turn off when the tap is closed.
Temperature
The water temperature has been set on the computer by the factory to be Maximum 140º F
(60º C). In order to achieve lower water temperatures, cold water needs to be mixed in with
the hot, or an optional part No. TM-RE10 can be installed allowing manual adjustment of the
output temperature for lower or higher.
WARNING: Temperatures above 125º F (52º C) can cause severe burns or death from
scalding. Children, disabled and the elderly are at high risk of being injured. Feel the water
temperature before bathing or showering. Do not leave children, disabled, and the elderly
without supervision.
MOBIUS water heater will produce a flow rate of hot water that is depend on the inlet water
temperature and the setting on the TM-RE10. Refer to the flow vs. temperature chart for the
output capabilities end of this installation manual.
Freeze Prevention Devices
This unit comes equipped with heaters that discourage the unit from freezing, but for this
freeze prevention system to operate there has to be electrical power to the unit.
The freeze prevention devices will not work if the electrical power source is
disconnected. The unit has been rated for temperatures down to 5º F (-15º C) in a wind free
environment. A wind chill factor will cause the unit to freeze at temperatures above 5º F (-15º
C). Do not install the water heater in an area with extremely cold weather. This will void your
warranty and Takagi - USA will not be responsible for any damage that occurs.
CAUTION: The pipe heaters are located on the MOBIUS Water Heater only. Any hot or
cold water pipes located outside of the unit will not be protected. Properly protect and
insulate these pipes from freezing.
Winterizing
If the heater will not be used for a long period of time or if the temperatures will drop below 5º
F (-15º C) with the wind chill factor, turn off the heater and drain the unit of water. This will
keep it from freezing and being damaged. Follow these instructions carefully:
1. Turn off the power supply to the MOBIUS Water Heater.
2. Close the manual gas control valve located outside your heater.
3. Close the manual water shut off valve located on the water supply line.
4. Open all hot water taps in the house. (Bathroom, kitchen, laundry room, etc.). When the
water flow has ceased, close all hot water taps.
5. Have a bucket or pan available to catch the water as it drains from the T-M1 drain plugs.
Remove the drain plugs to drain all the water out of the unit.
6. Let sit for 5 minutes.
7. Securely screw the drain plugs back into place.
To restart heater, follow these steps:
1.
2.
3.
4.
Make sure all hot water taps are closed and the drain plugs are securely attached.
Purge the water line of debris.
Turn on the manual water control valve located on the water supply line.
Open all the hot water taps to verify water flows to the taps. Then close hot water taps.
5. Turn on the manual gas control valve located on the gas supply line.
6. Turn on the power supply to the MOBIUS Water Heater.
DRAIN
DRAIN AND FILTER
INSTALLATION
This section is for the installer. The installer is responsible for the correct installation of
the MOBIUS Water Heater.
For Your Safety: Only a certified and trained service technician or qualified plumber may
service or install your product.
General
All gas water heaters require careful and correct installation to insure safe and efficient
operation. This manual must be followed exactly.
1. Read the For Your Safety section in the beginning of this manual.
2. The regulator is preset at the factory. It is computer controlled and should not need
adjustment.
3. Maintain proper space for servicing. Install the unit so that it can be connected or removed
easily.
4. The electrical connection requires a means for switching off the power supply.
5. Avoid installing the unit in an area with high levels of dust, sand or debris. These particles
may clog the air vent or impair the function of the fan, leading to improper combustion.
Regular maintenance is needed in these environments.
6. Do not install the unit where the exhaust vent is pointing into any opening in a building or
where the noise may disturb neighbors.
Accessories
Check that all parts listed below were included with the unit.
Installation Manual, Warranty Card and Optional Part Information
OUTDOOR INSTALLATION
Follow all local codes. In the absence of local codes, follow the National Fuel Gas Code
ANSI Z221.23.
Install the water heater in an open, uncovered area, and maintain the following minimum
clearances. The MOBIUS water heater must be installed hanging from a wall.
Piping side (Bottom)
Front (Maintenance space)
Back of heater
Top of heater
12”
Open
1”
36”
Do not install this water heater under an overhang without a 3 feet clearance between the
MOBIUS water heater and eaves or any obstacles. The area under an overhang must be
open to three sides. In case install two or more unit manifold, side clearance will be 0.5”
between Water heaters.
WARNING: Do not have the flue terminal pointing toward any opening into a building. Do not
locate your heater in a pit or location where gas and water can accumulate.
WARNING: 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 manufacture warranty will void.
WARNING: In the USA, do not install the water heater vent terminator within 4 feet of any air
intake opening into a building. In Canada do not install the water heater vent terminator within
10 feet any air intake opening into a building.
WARNING: Improper installation can cause nausea or asphyxiation from carbon monoxide
and flue gases which could result in severe injury or death. Improper installation will void
product warranty.
For high altitude installation above 4,500 feet, contact the manufacturer on how to handle this
situation.
WARNING: when it installs in outside, use proper vent terminator to top of the water heater or
Part No. TM-TV02 kit for outside installation vent terminator.
INDOOR INSTALLATION
FOR INDOOR INSTALLATION: ∗CUT PRESSURE SWITCH JUMP WIRE THEN INSTALL
4” VENT PIPE DIRECTLY ON FLUE OUTLET. ∗ : PLEASE! Look inside unit.
Combustion Air Supply
The water heater should be located in an area where enough air is available for proper
combustion and ventilation of the surrounding area. Follow the latest edition of ANSI
Standard Z223.1 and any your local codes that are applicable.
In general these requirements specify that if the unit is installed in a confined space, there
must be permanent air supply openings.
Minimum recommended Air supply to water heater
Water heater size
Max. 235.000 BTU
Outside air area
59 Sq. IN
Inside air area
235 Sq. IN
Air Supply from Outside Building: When combustion air is supplied directly through an
outside wall, such as intake louvers openings into the dwelling. Each opening should give a
minimum free area of one square inch per 4000 BTUH of the total input ratings of all
appliances in the enclosed area.
Air Supply from Inside Building: When combustion air is supplied from inside the building,
Each opening should give a minimum free area of one square inch per 1000 BTUH of the
total input ratings of all appliances in the enclosed area. These openings should never be
less than 100 Sq. IN.
235 Sq. In.
Exhaust Fans and Ventilation: The MOBIUS water heater is equipped with a combustible
air detector to measure whether there is enough air for proper combustion. If there is not, the
water heater will not work until air is provided properly.
Any equipment, which uses air from an enclosed space, can deplete the air from that area.
This can result in exhaust flowing from the flue to the enclosed space, which could result in
the accumulation of dangerous exhaust fumes in the space where the water heater is
installed. Additional air must be supplied to compensate for any exhaust effect.
If a blower of fan is used to supply air to the water heater room, the installer should make
sure it does not create drafts, which could cause unwanted shutdowns. If a blower is
necessary to provide adequate combustion air to the water heater, a switch or equivalent
device must be wired into the water heater control circuit to prevent the water heater from
firing unless the blower is operating.
Venting Instructions
GENERAL
This water heater must be vented in accordance with "Venting of Equipment" section of the
latest edition of the National Fuel Gas Code, ANSI Z223.1 and all applicable local building
codes.
WARNING: Improper venting of this appliance can result in excessive levels of Carbon
Monoxide, which can result in severe personal injury or death.
Here are some general rules for venting system for MOBIUS water heater.
1. Place the water heater as close as possible to the vent.
2. The vent collar on the water heater must be fastened directly to an unobstructed vent
pipe.
3. Do not weld the vent pipe to the water heater collar. The weight of the stack must not
rest on the water heater. The flue must be easily removable for normal service and
inspection of the unit.
4. The water heater must not be common vented with a fireplace, wood stove or other
equipment.
5. Avoid terminating the water heater vent near any air-conditioning or air-supply fans.
These fans can pick up the exhaust flue products from the water heater and return
them to the building. This can create a health hazard.
6. Avoid using an oversized vent pipe or using extremely long runs of the pipe. This may
cause excessive cooling and condensation of flue gases.
A) Vent Connections
The MOBIUS water heater should be vented as Category I with Single-wall metal pipe. The
vent system must be gas tight. All seams and joint must be sealed with silicone sealant or
adhesive tape having a minimum temperature rating of 400º F. For best results, a horizontal
vent system should be as short and straight as possible with Single wall Galvanized steel or
Stainless steel vent pipe. Single wall metal pipe shall be constructed of galvanized sheet
steel not less than 0.0304 in. thick, or of other approved, noncombustible, corrosion resistant material.
When installing the vent system, all applicable national and local codes must be followed. If
thimbles, fire stops or other protective devices are going to be installed which will penetrate
any combustible or noncombustible construction, be sure to follow all applicable national and
local codes.
Fan assisted appliances: Follow the requirement as indicated in the latest edition of ANSI
Z233.1/NFPA 54.
The entire vent system must not exceed the size specified in table.
Venting
Max. Vertical or Horizontal run in Length
Diameter
Max. No. of Elbow
4”
3 Ea.
35 ft
For each elbow added, deduct 5 ft. from max. Vent length.
When the horizontal vent run exceeds 5 ft the following criteria must be observed;
• Support the vent run at 3 ft intervals with overhead hanger.
• Pitch up the vent run toward the vent terminal at a rate of 1/ 4” per foot.
Indoor Installation Clearances
Bottom (Plumbing side)
Front (Maintenance space)
Back of heater
Sides∗
Top of heater
12”
Min. 4”
1”
2”
12"
∗: Install two or more unit manifold, side clearance will be 0.5” between Water heater.
B) Vent Termination
A sidewall vent terminal must be used when the water heater is vented through a wall. The
manufacture recommends Takagi Parts No. TK-TV01 as a vent terminator. The vent terminal
provides a means of installing vent pipe penetrating through a wall. Locate this in
accordance with ANSI Z223.1/NFPA 54.
Install the vent terminal in a location that will not be blocked by snow or water flooded area.
Most areas have codes requiring the terminal to be 12 inches above the grade, but the
installer may determine it should be higher depending on local conditions and applicable city
codes.
12"
12"
4"
2"
12"
2"
12"
GAS SUPPLY AND PIPING SIZING
This unit needs a manual gas control valve (system shutoff valve) that must be placed on the
unit before it is connected to the gas supply line.
Check the gas inlet pressure and that the type of gas matches the rating plate located on
your water heater. Insufficient gas pressure will cause your MOBIUS Water Heater to be
inefficient and not work properly. Size the gas supply piping correctly following
ANSI233.1/NFPA 54, or by local code.
The minimum and maximum inlet gas pressures are listed below:
Natural Gas
Propane Gas
Min. 5” WC
Max. 10.5” WC
Min. 11” WC
Max. 14” WC
In order to get a correct reading of the inlet supply pressure, the water heater and all other
gas appliances sharing the gas supply line must be firing at maximum capacity when the
pressure is measured. Maximum gas pressures must not exceed this value. If the gas
pressure is insufficient, this may be the result of an undersized gas supply pipe. The
MOBIUS water heater will not perform to its maximum capabilities without enough gas
supply. After connecting the unit, check for gas leaks by applying soapy water to all gas
fittings and connections. Soap bubbles are a sign of gas leaks.
This appliance and its individual shut-off valve must be isolated from the gas supply piping
system by unplugging the unit and turning off the main gas valve during any pressure testing
of the gas supply piping system at test pressures equal to or less than ½ psi. The appliance
and its gas connections must be leak tested before placing the unit in operation.
Always use approved connectors to connect the unit to the gas line. Always purge the gas
line of any debris before connection to the heater.
WARNING: Conversion of this unit from natural gas to propane or propane to natural gas
cannot be done in the field. Contact your local retailer or distributor to get the correct unit for
your gas type.
Recommend Gas pipe size for MOBIUS Water Heater
Distance from Gas Meter
Pipe Size (inches)
0' - 20'
3/4"
20' - 80'
1"
80' - 300
1-1/4"
NOTE: These Tables are for Natural Gas (0.60 Specific Gravity) and base on Pressure Drop
of 0.5 Inch water columns. This tables are Gas pipe will supply gas straight to water heater
without any tab.
Water Connections
An approved manual water control valve must be placed on the cold water supply line. All
soldering materials and piping materials must be useable with potable water.
If the water heater is installed in a closed water system, means shall be provided to control
thermal expansion. Contact the water supplier or local plumbing inspector on how to control
this situation. After installing the water heater, purge the water line to remove all debris and
air from it. It may damage the heater if installer does not do this act.
There is a wire mesh filter on the coldwater inlet, which discourages debris from entering the
heater. This will need to be cleaned periodically to ensure that the T-M1 has a long life cycle.
T&P Valve
HOT
COLD
GAS
WARNING: Do not reverse the hot outlet and cold supply line connections to the MOBIUS
Water Heater. This will result in dangerous operation and void the warranty. Make sure the
hot and cold lines are connected properly. Refer to the FOR YOUR SAFETY section at the
front of this manual.
TEMPERATURE AND PRESSURE RELIEF VALVE
This unit does not come with an approved temperature and pressure relief valve, however an
approved temperature and pressure relief valve must be installed on the hot water outlet. A
“Tee” fitting should be used to attach the temperature and pressure relief valve.
The temperature and pressure relief valve must meet not exceed the following:
Temperature Relief
Pressure Relief
210º F
150 psi
The discharge capacity must be at least 235,000 Btu/hr. The discharge piping for the
temperature and pressure relief valve must be directed so that if it becomes necessary, no
one will be hurt and nothing will be damaged by the escaping water. Attach the run-off tube to
the temperature and pressure relief valve, and run the end of the tube to within 6" of the floor.
Do not install any reducing couplings, valves, or any other type of restriction in this line. This
run-off tube must be installed to allow free and complete drainage of both the valve and the
run-off tube.
If the temperature and pressure relief valve on the appliance discharges periodically, this may
be due either to thermal expansion in a closed water supply system, or a defective
temperature and pressure relief valve. If the T&P valve is the problem, replace it with a new
one. If not, contact the water supplier or a local plumbing inspector for how to correct this
situation.
The temperature and pressure relief valve must be manually operated once a year to check
for correct operation.
Should overheating occur, or should the gas supply fail to shut off, turn off the manual gas
control valve to the appliance.
T & P Valve
CAUTION: The pipe heaters are located on the MOBIUS Water Heater only. Any hot or
cold water pipes located outside of the unit will not be protected. Properly protect and
insulate these pipes from freezing.
Electrical Connections
WARNING: The heater must be electrically grounded. Follow the 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.
Do not rely on the gas or water piping to ground the metal parts of the water heater, because
plastic pipe or dielectric unions may isolate the water heater electrically. Service and
maintenance personnel who work on or around the water heater may be standing on wet
floors, and could be electrocuted by an un-grounded water heater.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring error can
cause improper and dangerous operation. Verify proper operation after servicing.
The MOBIUS water heater requires an electrical power supply of 120 VAC, 60 Hz, and it
must be properly grounded to function.
• A means for switching off the 120 VAC power supply must be provided.
• Wire the heater exactly as shown in the wiring diagram.
• A green screw is provided in the junction box for the grounding connection.
Refer to the wiring diagram. There is a copy of the wiring diagram located on the inside
panel of the appliance.
Wiring Diagram
Also wiring diagram is located on the inside panel of the appliance.
Electrical Rating: 120 VAC, 60 Hz, 0.8 A.
Note: If any of the original wiring supplied with this appliance must be replaced, it must be replaced with
appliance wiring material (180c) or its equivalent. Wires are available through the manufacturer.
STARTING THE SYSTEM
For your safety, read before operating.
a) This water heater does not have a pilot. It is equipped with an ignition device, which
automatically lights the burner. Do not try to light the burner by hand.
b) Before operating, make sure that a gas leak is not evident by smelling the area around the
T-K1. Be sure to smell next to the floor because some gas is heavier than air and will
settle on the floor.
c) Use only a hand to turn the gas valve knob. Never use tools. If the knob will not turn by
hand, do not try to repair it, call qualified service technician. Force or attempted repair
may result in a fire or explosion due to the gas leakage.
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 parts that have been
under water.
WHAT TO DO IF YOU SMELL GAS
•
•
•
•
Do not try to start the water heater.
Do not touch any electrical switches, and do not use any phone in your building.
Immediately call the gas supplier from somewhere else. Follow the gas supplier’s
instructions.
If you cannot reach the gas supplier, call the fire department.
Operating Instructions
The MOBIUS Water Heater is an instantaneous, tankless water heater designed to supply
your entire household and commercial hot water needs utilizing total efficiency. The principle
behind the MOBIUS Water Heater is simple. Once you open a hot water tap, water flows
through the MOBIUS Water heater. The water flow sensor automatically commands the
computer to electronically ignite the burners and the computer monitors the water
temperature, water flow rate, and gas flow the insure you get the right amount of hot water
with right temperature hot water. After the burners are ignited the “fire on” lamp is lit.
Computer will modulate gas supply to valve and water flow. 0.75 gallons per minute is
required to turn the burners on, after the burners are ignited, the flow rate can be lowered to
0.6 gallons per minute to maintain and still keep the heater on.
Now as long as you have water, gas and electricity, you will get an endless hot water. Open a
hot water tap to turn on your water heater. Close the hot water tap to turn off your water
heater.
Normal Operation
To Turn on Your MOBIUS water heater
1. Open a hot water tap.
2. Burners will ignite. “Fire On” lamp will be lit.
3. Mix with cold water to get the correct temperature.
To Turn off your Flash water heater
1. Close the hot water tap
2. “Fire On” lamp extinguished.
Start Up
Once the unit has been properly installed, check the gas and water connections for leaks.
Check for proper ventilation and combustible air to the heater. Purge the gas and water
lines to remove debris. Then follow these steps to turn on your unit.
1. Close the manual gas control valve located on the gas line.
2. Fully open the manual water control valve on the water supply line.
3. Open a hot water tap, to verify that water will flow to that tap. Then close the hot water
tap.
4. Fully open the manual gas control valve.
5. Turn on the 120 volt 60 Hz power supply to the MOBIUS Water Heater.
6. Now you are ready to enjoy hours of endless hot water.
TO TURN OFF GAS APPLIANCE
Close the manual gate valve on the gas inlet line. Then turn off the power supply.
Manifold Gas Pressure Port
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. Force 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 gas 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.
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
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: 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.
WARNING
The outlet hot water temperature of the MOBIUS water heater is factory set 140 °F.
WARNING: Use this heater at your own risk. The set outlet water temperature can cause
severe burns instantly or death from scalds. Test the water before bathing or showering.
Do not leave children or the infirm without supervised.
DANGER
Hot Water Heater temperature over 125 °F 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 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.
Maintenance and Service
WARNING: Always turn off the electrical power supply, the manual gas control valve,
and the manual water valve when servicing.
The unit should be checked once a year by a certified and trained technician. If repairs are
needed, a certified and trained technician should do the repairs and services.
Regular Maintenance
Do this the first time immediately after installation.
1.
2.
3.
4.
5.
Clean the cold-water inlet filter (refer to figure below).
Be sure that all openings for combustion and ventilation air are not blocked.
Check that the vent pipe is not blocked.
Check the gas pressure.
Keep the area around the water heater clear. Remove any combustible materials,
gasoline or any flammable vapors and liquids.
Turn Counter Clockwise to OPEN
and Turn Clockwise to CLOSE
These systems and parts should be checked at least once a year.
1.
2.
3.
4.
5.
Venting system.
Burner.
Manually test the temperature and pressure relief valve to insure correct operation.
Periodically clean of the water filter (refer to figure above).
Heat exchanger. Remove the thermistor and check for a mineral coating. A mineral
coating on the thermistor requires flushing the heat exchanger with a de-scaling solution.
Allowing deposit build up will void your warranty and shorten the life of your water heater.
Cleaning the Heat Exchanger
If the heat exchanger must be cleaned, follow this procedure.
1.
2.
3.
4.
5.
Shut off all power to the water heater.
Use re-circulation method.
Wear Gloves when handling de-scaling solution.
Always ware EYE PROTECTION.
All equipment being de-scaled should be properly vented to prevent gas pressure
build-up during the cleaning operation.
6. Clean out any debris, which has fallen to the coldwater inlet filter.
MOBIUS Water Heater Troubleshooting:
The MOBIUS Water Heater Model T-M1 has a built in self-diagnostic computer mode for
safety and convenience in case of necessary maintenance service.
On the T-M1 computer board, a numeric error code will
appear when the MOBIUS water heater has a problem. This
error code will identify the symptoms of the problem and
indicate what service is necessary.
The T-M1 consists of five main systems. These are the
temperature control, the gas control, the water control, the
burner control, and the main computer control systems.
Error N0.
031,141,711,741,
751
701
111, 121
311, 321,331
391,611,721,991
501
651, 661,541
101
112
Component
Main Computer Control
Temperature Control (Setting Temp.
+ over 50 °F)
Burner Flame
Temperature control
Burner control
Gas control
Water control
Combustible Air
Vent pipe
Trouble Shooting Flow chart:
The MOBIUS water heater is one of the most trouble free water heaters there are.
However, if there is trouble, use the error code on the computer to follow this trouble shooting
flow chart.
b
`
g
B
c
q
a
`
a
p
c
Open Valve A
*1
Control Valve B
YES
Set Temperature
<140F
YES
YES
Valve C
Close limit off
Flow Sensor
>0.75 GPM
Faucet opened
YES
YES
Pre-check
Normal
Valve A
Open limit on
Display:
Display: Priority
Operation Switch ON
YES
YES
Valve C
Open limit on
YES
Valve B
Open limit on
Valve A
Open limit on
Valve C opens
Valve B opens
Valve A opens
Power On
Start
*2
Open Valve B
NO
(After 18 sec.)
NO
NO
NO
(After 18 sec.)
NO
(After 18 sec.)
NO
(After 18 sec.)
NO
(After 18 sec.)
NO
C
High-limit switch
Abnormal Burning
Abnormal High Temp.
Circuit board
Valve C failure
Valve B failure
Open Short:
Output Temp. Termistor
Open Short:
Mixing Temp. Termistor
Open Short:
Inlet Temp. Thermistor
Gas valve circuit
board failure
Valve H failure
Lost flame
Ignite failure
611
661
Valve B failure
Abnormal fan rotation
541
651
Valve C failure
Valve C failure
721
031
701
331
311
321
141
711
541
Flame failure
Mismatched gas
Circuit board failure
Open Short:
Inlet Temp. Thermistor
Open Short:
Output Temp. Thermistor
Open Short:
Mixing Temp. Thermistor
High-limit switch off
*3 *4 *5 *6
e
d
Circuit board for valve D.E.F Failure
Valve A failure
141
991
701
651
661
331
311
321
711
510
121
111
Fan off
611
*13
Valve F off
Valve G off
Valve E off
Valve D off
Valve H off
(After 35 sec.)
Fan off
Faucet closed
Flow sensor off
Operation switch off
Power off
All display off
Maintenance
MOBIUS
Water Heater
Model T-M1
Trouble Shooting
Diagnosis
Flow - Chart
Check flame
(>1.0ìA)
YES
f
Valve B
improperly open
Check for
Normal power?
YES
Check output temp.
<203F
YES
Proportional control
Igniter Off
Display: Running
Thermo fuse
Normal
YES
Valve G On
Valve D On
Valve H On
n
m
l
Igniter On
No flame
(>0.15ìA)
YES
f
k
Fan motor rotation
(>1000rpm)
YES
Fan motor on
Fan motor rotation
(<1000rpm)
YES
Valve A
Open limit on
YES
j
i
h
*1
NO
NO
(After 10 sec.)
NO
(After 3 sec.)
(After 5 sec.)
NO
(After 5 sec.)
NO
NO
(After 20 sec.)
NO
(After 20 sec.)
NO
(After 18 sec.)
NO
*2
YES
*4
YES
Fan Off
< 2 minutes
Igniter Off
Valve E Off
NO
A
101
E
D
Display: Running Off
Valve F Off
Valve G Off
Valve D Off
Valve G Off
Valve H Off
*6
Valve D Off
NO
*5
Valve H Off
Re-ignite
(< 2 times)
*3
B
Valve A
Close limit on
YES
Valve A close
Valve B open
Fan motor off
Display: running off
Flame detection off
Valve G Off
Valve D Off
No flame
(>0.15ìA)
YES
YES
5 sec. later
Valve F Off
Valve E Off
Valve H Off
Flow sensor off
Faucet closed
Stop
l
A
510 Blinks
h
(After 18 sec.)
NO
C
(After 10 min.)
(After 35 sec.)
NO
NO
F
NO
Flow sensor
< 8.45GPM
YES
E
NO
Start
Safety function
YES
Abnormal burning
Abnormal fan rotation
(<1000rpm)
When differential >±
200rpm with setting
Valve C control
Flow sensor
< 8.45GPM
YES
NO
Flow sensor
> 8.45GPM
YES
Valve C control
Capacity Check
< Max. BTU
YES
*13
NO
NO
(After 60 sec.)
Valve C Close
YES
NO
Valve C Open
NO
NO
Output temp down
Capacity check
< Max. BTU
YES
Valve F Off
Valve E Off
Check power
< Min. BTU
YES
NO
Capacity Check
> Max. BTU
YES
YES
YES
Fan speed up
>15%
YES
Thermocouple
< 10mV
YES
Thermocouple
< 12mV
Display: 101
NO
NO
YES
NO
Fan speed up 3%
NO
Thermocouple
< 10mV
Thermocouple
> 1mV
YES
Valve F On
Thermocouple
> 1mV
YES
Valve E On
Valve F Off
NO
NO
D
Valve E On
Check power
< Mid. BTU
YES
F
Max burning power: 12
661
NO
Symptom
Wrong Gas Type
Insufficient Gas Supply
Ignition Failure
Flame Loss
Hi-Limit Switch
Output Thermistor Fail
Inlet Thermistor Fail
311
321
661
651
Error
331
391
510
541
611
Flame detector
Display: running off
Flow Adjust. Valve Abnormality
Bypass Valve Abnormality
Symptom
Mixing Thermistor Fail
Thermocouple Abnormality
Main Gas Valve Abnormality
Two-Way Valve Abnormality
Fan Motor Abnormality
Solenoid Valve 1
Solenoid Valve 2
Solenoid Valve 3
Proportional Valve
Gas Inlet Valve (Main Valve)
<Gas Valve>
Valve D
Valve E
Valve F
Valve G
Valve H
Error
31
101
111
121
141
Water Outlet Valve (Two way valve)
Bypass Flow Adjustment Valve
Flow Adjustment Valve
Thermo fuse cut off
(>360F)
Open Short:
Inlet Temp. Thermister
Open Short:
Output Temp. Thermister
Open Short:
Mixing Temp. Thermister
<Water Valves>
Valve A
Valve B
Valve C
e
Abnormal high water
temperature
Circuit board for Valve D
failure
Hi-limit switch works
(>208F)
991
761
Error
701
711
721
741
751
Symptom
Mixing Thermistor Abnormality
Gas Solenoid Valve Abnormality
Computer Pre-post Check Problem
Main Remote Control Problem
Temperature Remote Control Problem
Multi-system
Controller Problem
Abnormal Burning
MOBIUS Water Heater
Parts List and Component Diagram
MOBIUS Water Heater
Part List
Part No.
Description
Part No.
Description
1
Case Assembly
65
O-ring P25
2
Brackets
66
Filter
3
Screw (W) M4 x 10
67
Packing
4
Back Guard Panel
68
Combustion Chamber
5
Transformer A
69
Burner Assembly
6
Transformer B
70
Screw M4 x 12
7
Junction Box
71
Wire Holder
8
Junction Box Cover
72
Spark Electrode Holder Packing
9
Screw M4 x 8
73
Spark Electrode Holder
10
Sound Insulation
74
Screw M4 x 10
11
Screw M4 x 8 (Coated)
75
Silicon Cap
12
Weather Protection Panel
76
Spark Electrode Fixing Plate
13
Front Cover
77
High Voltage Igniter Cable
14
Exhaust Pipe
78
O-ring (seal)
15
Heat Exchanger Assembly
79
Thermocouple
16
Hi-Limit Switch
80
Thermocouple Fixing Plate
17
Screw M3 x 6
81
Overheat Cut Off Fuse
18
Screw M4 x 10 (coated)
82
Damper
19
Output Thermistor
83
Washer
20
O-ring P4
84
Pressure Switch Port
21
Heater Block 604
85
Silicon Tube
22
Heat Exchanger Fixing Plate (Back)
86
Pressure Switch
23
Heat Exchanger Fixing Plate (Front)
87
Fan Motor
24
Over Heat Cut Off Fuse Fixing Plate
88
Screw M4 x 12 Hex
25
Over Heat Cut Off Fuse
89
Thermostat
26
Heater Block Fixing Plate
90
Screw (W) M3 x 10
27
Inlet Thermistor
91
Manifold
28
Two Way Valve Cover
92
Manifold Gas Pressure Port
29
Silicon O-ring M26
93
Gasket
30
Two Way Valve Assembly
94
Screw M4 x 12
31
O-ring P20
95
Manifold Gas Pressure Tap
32
Screw M4 x 8
96
Gas Coupling
33
Quick Release Plate
97
Screw M4 x 8 (Washer & Hex head)
34
O-ring JASO#1017
98
Igniter Fixing Plate
35
Screw M4 x 12
99
Igniter
36
Flange
100
Screw M4 x 6
37
Flow Adjustment Valve
101
Solenoid Valve Wire
38
O-ring P16
102
Proportional Valve Wire
39
Bypass Junction
103
Gas Valve Unit
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
Screw M4 x 6
O-ring P18
Water Outlet Connection
Screw M4 x 14
Mixing Thermistor
O-ring P6
Drain Plug
Mixing Connection
Drain Plug Band
Water Outlet
Screw (W) M4 x 12
Bypass Flow Adjustment Valve
Bypass Valve Cover
Silicon O-ring M22
Bypass Connection
O-ring JASO3#1017
Clamp
Heater Fixing Plate
Screw M4 x 6
Flow Sensor
Heater 102
Magnetic Protection Plate
O-ring JASO#1019
Screw M4 x 14 (coated)
Water Inlet
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
O-ring P22
O-ring P18
Screw M4 x 8
O-ring P26
Gas Inlet
Gas Filter
Gas Inlet Fixing Plate
Computer Board
Computer Board Sticker
Mode Port
Control Box
Screw M3 x 25
Wire Holder
Condenser Terminal Plate
Surge Absorber: A
Surge Absorber: B
Screw M4 x 16
Condenser Terminal
Power Distribution Plate
Ground Fault Circuit Interrupter
Fuse Box
Fuse
Fuse Cover
Remote Control Terminal
Screw M3 x 12
MOBIUS Water Heater Application
Hot Water Output Temperature Setting:
The hot water output temperature on the MOBIUS water heater can be adjusted with an optional remote
controller (Part TM-RE10, 95 °F to 176 °F) or manually with computer control board dipswitches. The
dipswitches can adjust between the following temperatures; 113 °F, 140 °F, 167 °F, and 176 °F. The
failsafe temperature is 140 °F.
Hot Water Re-circulation system:
Expansion Tank
Check Valve
Cold Water Supply
Aqua stat
Hot Water Supply
Pump
Hot Water Return
For more detailed Information, information and diagrams can be attained from a trained technician,
qualified installer, service agency, or from the manufacturer’s technical department.
Hydro-Heating and Radiant Heating System Application:
For More Detailed Information: Contact a trained technician, qualified installer, service agency, or the
manufacturer’s technical department.
Manifolded Multi-System Application for Large Volume.
The MOBIUS Water Heater is fully capable of being used in a manifolded multiple-unit system using the
Multi-System Computer Control (Optional Part TM-RE20). This Multi-System Computer Control can
manifold from 2 units to 20 units for commercial and residential application.
A single Multi-System can burn gas in the range of 26,000 BTU to 4.7 Million BTU, and the computer will
completely modulate the system.
For More Detailed Information: Contact a trained technician, qualified installer, service agency, or the
manufacturer’s technical department.
Output Hot Water GPM
7.0
8.5
7.7
9.6
40 F
50 F
70 F
60 F
95
90
0.0
2.0
4.0
6.0
8.0
10.0
12.0
7.0
8.5
9.6
5.9
105
7.7
6.4
100
7.0
8.5
9.6
5.9
5.1
115
7.7
6.4
5.5
110
7.0
5.9
5.1
4.5
125
6.4
5.5
4.8
4.3
130
5.9
5.1
4.5
4.0
135
40 F
50 F
60 F
70 F
5.5
4.8
4.3
3.8
140
Output Hot Water Temperature
7.7
6.4
5.5
4.8
120
4.8
4.3
3.8
3.5
150
4.3
3.8
3.5
3.2
160
Output Temperature vs. GPM (Max. 9.6 GPM) for Various Input Water Temperature
4.0
3.7
3.3
3.1
165
3.8
3.5
3.2
3.0
170
3.7
3.3
3.1
2.8
175
3.5
3.2
3.0
2.7
180
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