Takagi MOBIUS, Installation And Operation Instruction Manual

Page 1: ...ructions 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 FEATURES θ 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 ...

Page 2: ...HAT 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 ...

Page 3: ...pplication 36 Temperature Chart 38 SPECIFICATIONS Natural Gas Input Min 25 000 Btu Max 235 000 Btu LPG Input Min 25 000 Btu Max 225 000 Btu Gas Connection NPT Water Connection NPT Water Pressure Min 15 psi Max 150 psi Natural Gas Pressure Inlet Min 5 WC Max 10 5 WC LP Gas Pressure Inlet Min 11 WC Max 14 WC Manifold Pressure Natural 2 2 WC Propane 2 7 WC Weight 70 lbs Dimensions 24 x18 x 9 Ignition...

Page 4: ...LLOW 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 eno...

Page 5: ...ty 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 ...

Page 6: ...ture 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 gall...

Page 7: ... 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 fo...

Page 8: ...on 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 ...

Page 9: ...ttom 12 Front Maintenance space Open Back of heater 1 Top of heater 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 WARNING Do not have the flue terminal pointing toward any opening in...

Page 10: ...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 Use proper ...

Page 11: ...openings Minimum recommended Air supply to water heater Water heater size Outside air area Inside air area Max 235 000 BTU 59 Sq IN 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 al...

Page 12: ...ich 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 b...

Page 13: ...4 per foot Indoor Installation Clearances Bottom Plumbing side Min 12 Front Maintenance space Suggested 24 Min 4 Back of heater 1 Sides Min 2 Top of heater Min 12 When MOBIUS installs with manifold system side clearance will be 0 5 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 ter...

Page 14: ...d 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 Min 5 WC Max 10 5 WC Propane Gas Min 11 WC Max 14 WC 12 12 4 12 12...

Page 15: ...nnection 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...

Page 16: ...f 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 ...

Page 17: ...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 require...

Page 18: ... 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 ...

Page 19: ... 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...

Page 20: ... 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 ...

Page 21: ... 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 g...

Page 22: ...a qualified service technician to inspect the water heater and to replace any damaged parts WARNING If you do not follow these instructions exactly a fire or explosion may result causing property damage personal injury or loss of life 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 t...

Page 23: ...hildren or the infirm without supervised DANGER 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 DANGER Hot Water Heater temperature over 125 F can cause severe burns instantly or de...

Page 24: ...t the vent pipe is not blocked 4 Check the gas pressure 5 Keep the area around the water heater clear Remove any combustible materials gasoline or any flammable vapors and liquids These systems and parts should be checked at least once a year 1 Venting system 2 Burner 3 Manually test the temperature and pressure relief valve to insure correct operation 4 Periodically clean of the water filter refe...

Page 25: ...ter 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 Trouble Shooting Flow chart The MOBIUS water heater i...

Page 26: ...sec Valve A opens Valve B opens Valve C opens Display Display Priority Control Valve B Open Valve B Open Valve A 611 13 4 Valve A failure High limit switch off Open Short Inlet Temp Thermistor Open Short Output Temp Thermistor Open Short Mixing Temp Thermistor Circuit board failure Mismatched gas Flame failure Valve C failure Abnormal fan rotation Ignite failure Lost flame Valve C failure Valve B ...

Page 27: ...ning Igniter Off Proportional control Check output temp 203F Check for Normal power Valve B improperly open 2 minutes Fan Off Re ignite 2 times Valve H Off Valve D Off Valve G Off Igniter Off Valve H Off Valve D Off Valve G Off Valve E Off Valve F Off Display Running Off D E YES YES 5 sec later Valve A Close limit on Faucet closed NO NO After 35 sec NO After 18 sec Valve H Off Valve E Off Valve F ...

Page 28: ...tart Safety function Capacity Check Max BTU Flow sensor 8 45GPM Valve C control Valve C Close Capacity Check Max BTU Flow sensor 8 45GPM Valve C control Check power Mid BTU Valve E On Valve F Off Valve E On Valve F On Thermocouple 1mV Thermocouple 10mV Thermocouple 1mV Thermocouple 10mV Fan speed up 15 Display 101 Max burning power 12 Thermocouple 12mV Fan speed up 3 13 Abnormal fan rotation 1000r...

Page 29: ... Ignition Failure 510 Main Gas Valve Abnormality 721 Computer Pre post Check Problem 121 Flame Loss 541 Two Way Valve Abnormality 741 Main Remote Control Problem 141 Hi Limit Switch 611 Fan Motor Abnormality 751 Temperature Remote Control Problem 311 Output Thermistor Fail 661 Bypass Valve Abnormality 761 Multi system Controller Problem 321 Inlet Thermistor Fail 651 Flow Adjust Valve Abnormality 9...

Page 30: ...MOBIUS Water Heater Parts List and Component Diagram ...

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Page 34: ...t 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 1...

Page 35: ...rol Box 51 Bypass Flow Adjustment Valve 115 Screw M3 x 25 52 Bypass Valve Cover 116 Wire Holder 53 Silicon O ring M22 117 Condenser Terminal Plate 54 Bypass Connection 118 Surge Absorber A 55 O ring JASO3 1017 119 Surge Absorber B 56 Clamp 120 Screw M4 x 16 57 Heater Fixing Plate 121 Condenser Terminal 58 Screw M4 x 6 122 Power Distribution Plate 59 Flow Sensor 123 Ground Fault Circuit Interrupter...

Page 36: ...ard 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 Recirculation system 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 Expansion Tank Cold Water Supply Check Valve Pump...

Page 37: ... 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 technic...

Page 38: ... 40 F 50 F 60 F 70 F 40 F 7 7 7 0 6 4 5 9 5 5 5 1 4 8 4 5 4 3 4 0 3 8 3 5 3 2 3 1 3 0 2 8 2 7 50 F 9 6 8 5 7 7 7 0 6 4 5 9 5 5 5 1 4 8 4 5 4 3 3 8 3 5 3 3 3 2 3 1 3 0 60 F 9 6 8 5 7 7 7 0 6 4 5 9 5 5 5 1 4 8 4 3 3 8 3 7 3 5 3 3 3 2 70 F 9 6 8 5 7 7 7 0 6 4 5 9 5 5 4 8 4 3 4 0 3 8 3 7 3 5 90 95 100 105 110 115 120 125 130 135 140 150 160 165 170 175 180 ...