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6. 

WARNING:

 Do not disconnect the 

electrical supply if the ambient temperature 
will drop below freezing. The Freeze 
Prevention Device only works if the unit 
has electrical power. The Freeze 
Prevention Device is rated for temperatures 
down to 5 ºF (-15 ºC) in a wind free 
environment. Refer to the section on 
Winterizing and the Freeze Prevention 
Device for more information. The Warranty 
will not be covered if the heat exchanger is 
damaged due to freezing.  

7. 

WARNING:

 Water temperatures over 

125ºF can cause severe burns instantly or 
death from scalding. The water 
temperature is set at 122ºF (50ºC) from the 
factory to minimize any scalding risk. 

 

Before bathing or showering always check 
the water temperature. 

8. 

WARNING:

 Do not use this appliance if 

any part has been in contact with or been 
immersed water. Immediately call a trained 
technician to inspect and/or service the unit 
if necessary. 

9. 

WARNING:

 Do not store or use gasoline or 

other flammables, vapors or liquids in the 
vicinity of this appliance. 

10. 

WARNING:

 Do not reverse the water 

and/or gas connections as this will damage 
the gas valves and can cause severe injury 
or death. Following the diagram below 
when installing your water heater: 

 

 

 

 

 

 
 
 
 

GENERAL 

 

The T-M1. Water Heater is an instantaneous, 
tankless water heater designed to supply 
endless hot water to your entire household 
and/or commercial facility utilizing total 
efficiency. The principle behind the T-M1 
Water Heater is simple. Once you open a hot 
water tap, water flows through the T-M1 Water 
heater. Once a minimum of 0.75 GPM is 
achieved, the flow sensor automatically 
commands the computer to turn on the fan, 
activate the electronic igniter and open the gas 
valves. The computer monitors water 
temperature, water flow rate, and gas flow to 
insure that you get the right amount of hot 
water at the correct hot water temperature. 
After the burners are ignited, the “fire on” lamp 
is lit. The computer will modulate the gas 
supply 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 
the heater on. It is advisable to increase the 
cold tap rather than decreasing the hot tap to 
adjust the water temperature. As long as you 
have water, gas and electricity, you will get an 
endless flow of hot water. Open a hot water tap 
to turn on your water heater. Close the tap to 
turn off your water heater. 

 

Summary of Contents for Mobius T-M1

Page 1: ...injury or death In addition if the information in this manual is not followed exactly a fire or explosion may result causing property damage personal injury or death T M1 Instantaneous Water Heater Installation Manual and Owner s Guide Mobius Water Heater Model T M1 Suitable for potable water heating and space heating FEATURING ENDLESS HOT WATER ON DEMAND COMPACT SPACE SAVING ENERGY CONSERVING COM...

Page 2: ...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 23 6 x18 5 x8 9 Ignition Electronic Ignition Electrical Supply AC 120 V NOTE Check the rating plate to ensure this product matches your specifications This appliance is certified for use at altitudes from 0ft to 4500ft 1 ...

Page 3: ...n It is advisable to open further the cold tap rather than decreasing the hot tap to adjust the water temperature As long as you have water gas and electricity you will get an endless flow of hot water Open a hot water tap to turn on your water heater Close the tap to turn off your water heater FOR YOUR SAFETY PLEASE READ THIS MANUAL CAREFULLY AND FOLLOW ALL DIRECTIONS 1 Follow all local codes or ...

Page 4: ...e severe injury or death Following the diagram below when installing your water heater GENERAL The T M1 Water Heater is an instantaneous tankless water heater designed to supply endless hot water to your entire household and or commercial facility utilizing total efficiency The principle behind the T M1 Water Heater is simple Once you open a hot water tap water flows through the T M1 Water heater ...

Page 5: ... the exhaust vent is pointing into any opening in a building or where the noise may disturb your neighbors Make sure the vent termination is 4 feet from a doorway or opening to prevent exhaust from entering 7 Some chemicals used in a beauty salon may affect the flame sensor Water heater may not work properly Please consult with Takagi when the water heater is installed in a beauty salon 8 Water ha...

Page 6: ...clearances around the unit Combustion Air Supply The water heater location must provide enough air for proper combustion and ventilation of the surrounding area See the latest edition of ANSI Standard Z223 1 or any applicable local codes In general these requirements specify that if the unit is installed in a confined space there must be a permanent air supply opening Air Supply from Outside Build...

Page 7: ...h 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 This unit requires 4 Category III approved single wall stainless steel vent pipe or any other Category III approved non combustible corrosion resistant material The following are UL listed manufacturers Pr...

Page 8: ...ent 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 The weight of the vent stack must not rest on the water heater 5 The vent must be easily removable from the top of the water heater for normal service and inspection of the unit 6 The water heater vent must not be connected to any other gas appliance or ven...

Page 9: ...corner G Clearance to inside corner H Clearance to each side of center line extended above meter regulator assembly 3 feet I Clearance to service regulator vent outlet 3 feet J Clearance to non mechanical air supply inlet to building or the combustion air inlet to any other application 3 feet 1 foot 4 feet from below or side opening 1 foot from above opening K Clearance to mechanical air supply in...

Page 10: ...ore connecting to the heater gas inlet Pipe Sizing Example This table below is for Natural gas piping supply straight to the water heater without any tabs to other gas appliances Recommend Gas pipe size for T M1 Water Heater Example for NG Distance from Gas Meter Pipe Size inches 0 20 3 4 20 70 1 70 200 1 1 4 1 Turn off all electric power to the water heater if service is to be performed 2 Turn th...

Page 11: ...an anti backflow device in the cold water supply line a thermal expansion tank must be installed Contact the water supplier or local plumbing inspector on how to control this situation After installation of the water heater is complete purge the water line to remove all the debris and air from the line Failure to do so may cause damage to the heater There is a wire mesh filter within the cold inle...

Page 12: ...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 T M1 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 ELECTRICAL CONNECTIONS WARNING Fo...

Page 13: ...have been under water Once the above checks have been completed 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 is flowing to that tap Then close the hot water tap 4 Fully open the manual gas control valve installed 5 Turn on the 120 ...

Page 14: ...ture can be adjusted either manually from the main computer board s dipswitches or with the optional remote controller Part TM RE10 from 99 F to 182 F The dipswitches can set four hot water output temperatures 113 F 122 F 140 F and 182 F the factory set temperature is 122 F could damage the temperature controller and or the water heater which will void the warranty Household Flow Rates Appliance U...

Page 15: ...el 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 Wiring Diagram ...

Page 16: ...y the anti freeze devices on the T M1 Any hot or cold water pipes located outside of the unit will not be protected Properly protect and insulate these pipes from freezing 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 T M1 water heater requires an electrical power sup...

Page 17: ...mage If you have installed a combination system a T M1 doing both domestic hot water and space heating completely isolate the heating system temporarily to ensure flow is not backfeeding through your heating system to supply the domestic water by passing the T M1 If neither of those remedies start the unit press the lower green button marked test off on the GFCI inside the unit If the red light ab...

Page 18: ...pped 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 an...

Page 19: ...e 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 DANGER Keep flammable products 1 Far away from heater 2 In approv...

Page 20: ...s 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 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 onl...

Page 21: ...es 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 a...

Page 22: ...re for longer periods of time then it can be installed in conjunction with a storage tank A pump will be necessary to keep the storage tank water hot We suggest a high head pump of 1 12 hp or greater depending on the system Recirculation This illustration is a concept design only This system will also need a high head pump of 1 12 hp or greater depending on the application situation ...

Page 23: ... any applicable codes 3 TK TV03 Vent Damper The TK TV03 Vent Damper prevents the backflow of air through the exhaust vent This is a CSA tested Takagi component 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 Takagi s ...

Page 24: ...tem with fully automatic modulation for large applications Electric Wiring MOBIUS Water Heater Model T M1 Electrical Load Maximum 0 8 A 120V per Unit Individual cut off switch even though units have very low electrical load recommended for multi system for the purpose of maintenance Multi System Main Multi System Controller TM RE20 and Temperature Remote Controller TM RE10 wiring RE 10 Detail Wiri...

Page 25: ...cable For Multi mode permanently pull out To switch to Multi mode this jump cable has to be removed from the T M1 computer board permanently but please keep this jump connector safety stored for future maintenance this jumper is located behind the do not remove label Error signal LED this LED shows for unit error also it will show on RE 10 and RE20 Error codes are Error Code section in this Instal...

Page 26: ...ulation control If the operation switch of RE20 is turned on the time with water temperature near setting temperature in a pipe and when it is not necessary to burn units slight flow adjustment valve will be closed compulsorily and circulation flow rate will be reduced A circulation pump is always ON D Remove Store and Re cir jumper Save energy re circulation Although it is the same as that of Ins...

Page 27: ...iagram 50 49 48 46 47 35 44 20 29 45 34 42 31 40 39 31 43 41 37 38 26 60 30 29 28 32 33 34 35 36 20 27 52 40 34 58 18 51 53 54 55 57 56 56 61 40 62 63 65 66 48 64 40 60 59 34 26 23 25 24 18 22 21 20 19 18 17 16 15 14 ...

Page 28: ... 28 128 127 126 123 9 125 124 122 119 120 117 121 118 115 116 115 114 111 18 112 113 ...

Page 29: ......

Page 30: ... 30 1 2 3 4 5 6 2 3 7 8 9 10 11 12 13 3 ...

Page 31: ... Hi Limit Switch 50 Screw W M4 x 12 17 Screw M3 x 6 51 Bypass Flow Adjustment Valve 18 Screw M4 x 10 coated 52 Bypass Valve 19 Outlet Thermistor 53 Silicon O ring M22 20 O ring P4 54 Bypass Connection 21 Heater Block 604 55 O ring JASO3 1017 22 Heat Exchanger Fixing Plate Back 56 Clamp 23 Heat Exchanger Fixing Plate Front 57 Heater Fixing Plate 24 Over Heat Cut Off Fuse Fixing Plate 58 Screw M4 x ...

Page 32: ...Plate 81 Overheat Cut off Fuse 111 Computer Board 82 Damper 112 Computer Board Sticker 83 Washer 113 Mode Port 84 Pressure Switch Port 114 Control Box 85 Silicon Tube 115 Screw M3 x 25 86 Pressure Switch 116 Wire Holder 87 Fan Motor 117 Terminal Holder 88 Screw M4 x 12 Hex 118 Surge Absorber A 89 Thermostat 119 Surge Absorber B 90 Screw W M3 x 10 120 Screw M4 x 16 91 Manifold 121 Terminal 92 Gas J...

Page 33: ...e Output Hot Water GPM 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 ...

Page 34: ... 33 MM1097 126 ...

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