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MOBIUS Water Heater
Store these instructions near to the water heater for reference purposes.
FEATURES
ENDLESS HOT WATER SUPPLY
θ
ON-DEMAND HEATING
θ
PILOT-LESS SYSTEM
θ
COMPACT, SPACE SAVING
θ
COMPUTERIZED CONTROLS
θ
COMPUTERIZED SAFETY DEVICES
θ
MULTI-UNIT INSTALLATION READY
θ
Takagi Industrial Co. USA, Inc.
Installation and Operation Instruction
MODEL T - M1
MOBIUS Water Heater
Gas Fired, Instantaneous, Tankless
Water Heater
TAKAGI INDUSTRIAL CO. USA Inc.
Tel. (949) 453 - 8388, FAX. (949) 453-8498
E-Mail: Takagi@takagi-usa.com
6 Goddard, Irvine, CA 92618
http://www.takagi-usa.com
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Summary of Contents for Takagi MOBIUS
- Page 1 MOBIUS Water Heater Takagi Industrial Co. USA, Inc. Installation and Operation Instruction MODEL T - M1 MOBIUS Water Heater Gas Fired, Instantaneous, Tankless Water Heater FEATURES ENDLESS HOT WATER SUPPLY θ ON-DEMAND HEATING θ PILOT-LESS SYSTEM θ COMPACT, SPACE SAVING θ...
- Page 2 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.
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Page 3: Table Of Contents
• 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. -
Page 4: Introduction
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. - Page 5 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.
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Page 6: Operation
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. -
Page 7: Temperature
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. -
Page 8: Installation
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. -
Page 9: Outdoor Installation
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”. - Page 10 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.
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Page 11: Indoor Installation
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. -
Page 12: Venting Instructions
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... -
Page 13: 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. -
Page 14: Gas Supply And Pipe
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. -
Page 15: Water Connections
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. -
Page 16: T & P Relief Valve
T&P Valve COLD 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. -
Page 17: Electrical Connection
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. -
Page 18: Wiring Diagram
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. -
Page 19: Starting The System
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... - Page 20 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.
- Page 21 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.
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Page 22: For Your Safety Read Before Operating
FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. A. This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. - Page 23 WA RN I N G 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.
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Page 24: Maintenance And Service
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. -
Page 25: Cleaning The Heat Exchanger
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. -
Page 26: Trouble Shooting Flow Chart
② Faucet closed Valve B Open limit on Circuit board failure (After 18 sec.) ⑱ Mismatched gas Valve C MOBIUS Open limit on (After 18 sec.) Water Heater Flame failure Model T-M1 Valve C failure Operation Switch ON Trouble Shooting Diagnosis ③... - Page 27 Stop ⑨ Faucet closed Valve A Open limit on (After 18 sec.) Flow sensor off Fan motor rotation Valve H Off (<1000rpm) (After 20 sec.) Fan Off Valve E Off ⑩ Fan motor on Valve F Off ⑪ Fan motor rotation 5 sec.
- Page 28 (After 60 sec.) Output temp down Check power < Min. BTU Check power < Mid. BTU Valve E Off Valve F Off Valve E On Valve E On Valve F Off Valve F On Capacity check < Max. BTU Thermocouple >...
- Page 29 Hi-limit switch works (>208F) Circuit board for Valve D failure Abnormal high water temperature Open Short: ⑥ Inlet Temp. Thermister Open Short: Output Temp. Thermister Open Short: Display: running off Mixing Temp. Thermister Thermo fuse cut off Flame detector (>360F) <Water Valves>...
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Page 30: Part Diagram
MOBIUS Water Heater Parts List and Component Diagram... -
Page 34: Part List
MOBIUS Water Heater Part List Part No. Description Part No. Description Case Assembly O-ring P25 Brackets Filter Screw (W) M4 x 10 Packing Back Guard Panel Combustion Chamber Transformer A Burner Assembly Transformer B Screw M4 x 12 Junction Box... - Page 35 Screw M4 x 6 O-ring P22 O-ring P18 O-ring P18 Water Outlet Connection Screw M4 x 8 Screw M4 x 14 O-ring P26 Mixing Thermistor Gas Inlet O-ring P6 Gas Filter Drain Plug Gas Inlet Fixing Plate Mixing Connection Computer Board Drain Plug Band Computer Board Sticker Water Outlet...
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Page 36: 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;... - Page 37 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.
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Page 38: Temperature Chart
Output Temperature vs. GPM (Max. 9.6 GPM) for Various Input Water Temperature 12.0 10.0 40 F 50 F 60 F 70 F Output Hot Water Temperature 40 F 50 F 60 F 70 F...
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