Takagi T-H3M-DV, Installation Manual And Owner'S Manual

Page 1: ...iately 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 On Demand Water Heater Installation Manual and Owner s Guide ANSI Z21 10 3 and CSA 4 3 If the information in these instructions is not follow...

Page 2: ...s 28 APPLICATIONS 29 INITIAL OPERATION 31 OPTIONAL ITEMS 32 Owner s Guide OPERATING SAFETY 35 NORMAL OPERATION 37 Display of controller 37 General 37 Temperature table of controller 37 Temperature settings 38 Additional features 39 Flow 40 Freeze protection system 40 Maintenance and service 41 Unit draining and filter cleaning 41 Descaling the unit 42 TROUBLESHOOTING 43 General 43 Error codes 45 C...

Page 3: ...at you read through this safety manual carefully Please refer to the back of the manual for details about the warranty Keep this manual for future reference If you lose the manual contact the manufacturer or your local distributor When you call please tell us the model number and the serial number of your unit written on the rating plate of the water heater ...

Page 4: ...0 Indoor T H3M DV 140 Outdoor T H3M OS Natural Gas Input Operating Range BTU h Min 15 000 Max 120 000 Propane Input Operating Range BTU h Min 15 000 Max 120 000 Gas Connection 1 2 NPT Water Connection 3 4 NPT Water Pressure psi MPa 15 150 0 1 1 0 Natural gas Inlet Pressure inch W C kPa Min 5 0 1 2 Max 10 5 2 6 Propane Inlet Pressure inch W C kPa Min 8 0 2 0 Max 14 0 3 5 Manifold Pressure Natural G...

Page 5: ...nstalled outdoors The principle behind tankless water heaters is simple This diagram illustrates tankless water heater design concepts only and does not accurately represent the water heater s physical description 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 initiates the fan motor and sends a signal to the igniter to create...

Page 6: ...r does not match your requirements do not install and consult with the manufac turer 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 WARNING Water temperatures over 125 F 52 C can cause severe burns instantly or death from scalding The water temperature is set at 120 F 49 C from the factory to mini...

Page 7: ... of the gas or cause damage to the water heater Regularly ensure that the area around the water heater is dust or debris free Regular maintenance is recommended for these types of environments Sealed combustion is recommended too 9 The 140 Indoor T H3M DV model is to be installed indoors only The model is equipped with a thermistor and hi limit switch for the exhaust gas detecting excess temperatu...

Page 8: ... is required to be installed under the water heater in case of leaks It is recommended to direct vent the heater WARNING Damage caused by water quality is not covered by the warranty Only potable water or potable water glycol mixtures can be used with this water heater Do not introduce pool or spa water or any chemically treated water into the water heater Water hardness levels must not exceed 7 g...

Page 9: ...05 mm 4 in 102 mm 1 in 25 mm 3 in 76 mm 140 Outdoor T H3M OS 36 in 914 mm 12 in 305 mm 24 in 610 mm 1 in 25 mm 3 in 76 mm 24 inches recommended for maintenance Top Back Side Side Front Bottom Do not install this water heater under an overhang less than 3 ft 914 mm from its top top of exhaust part or eaves The area under an overhang must be open to three sides Outdoor models only Do not install the...

Page 10: ...nt systems must use venting that complies with ULC S636 General rules for venting water heaters are Place the water heater as close as possible to the vent termination The vent collar of the water heater must be fastened directly to an unobstructed vent pipe Do not weld the vent pipe to the water heater s vent collar Do not cut or alter the vent collar of the water heater The vent must be easily r...

Page 11: ...pe and Fittings Schedule 40 PVC ANSI ASTM D1785 ULC S636 Certified Materials Only PVC DWV ANSI ASTM D2665 Schedule 40 CPVC ANSI ASTM F441 Schedule 40 ABS DWV ANSI ASTM D2661 Polypropylene UL 1738 Pipe Cement Primer PVC ANSI ASTM D2564 CPVC ANSI ASTM F493 ABS ANSI ASTM D2235 NOTE Do NOT Use Cellular Foam Core Pipe For each elbow added deduct 5 ft 1 5 m from max vent length For details on the vent c...

Page 12: ...t No 6 ON No 7 ON OFF ON 1 2 3 4 5 6 7 8 9 10 OFF ON 1 2 3 4 5 6 7 8 9 10 OFF ON 1 2 3 4 5 6 7 8 9 10 Set DIPswitches shown in the tables below depending on the vent length Only adjust switches with a black square Black squares indicate the position of the switch Vent length Single pipe 5 to 45 ft DEFAULT No 6 ON No 7 OFF 46 to 70 ft No 6 OFF No 7 OFF OFF ON 1 2 3 4 5 6 7 8 9 10 OFF ON 1 2 3 4 5 6...

Page 13: ...rectly on the intake vent collar of the water heater 2 Connect a 3 x 2 reducer directly on the exhaust vent collar of the water heater Make sure the couplings engage the o rings installed in the intake and exhaust vent collars 3 Connect a 2 straight pipe to the reducer Vent connections for single pipe The water heater came with a metal screen that will fit into a 3 inch elbow 3 elbow with bird scr...

Page 14: ...d screen Intake vent collar Female The water heater came with a metal screen that will fit into a 3 inch elbow For details of the optional items refer to the Installation manual for each optional item 1 Connect 3 x4 increasers directly on the exhaust and intake vent collar of the water heater Make sure the couplings engage the o rings installed in the intake and exhaust vent collars 2 Connect 4 st...

Page 15: ...rect vent Single pipe with room air intake Terminations Wall Hanger Hanger Roof Roof flashing Fire stop Termination Wall Hanger Roof flashing Fire stop Roof Refer to pages 17 and 19 for clearance information Examples of installation of 3 inch 4 inch vent ...

Page 16: ...ure rating of 160 F For best results a vent system should be as short and straight as possible The Indoor model is a Category IV appliance and must be vented accordingly with any 4 inch vent approved for use with Category III IV or Special BH type gas vent The manufacturer recommends the NovaVent Z Vent line However the following are also UL listed manufacturers ProTech Systems Inc FasNSeal Metal ...

Page 17: ...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 inlet 6 feet 3 feet 3 feet L Clearance above paved sidewalk or paved driv...

Page 18: ...tion at least 1 ft 305 mm away from each other no matter the orientation A direct vent termination must also be at least 2 ft 610 mm away from an inside corner If the adjacent wall is less than 2 ft 610 mm of length the minimum required distance away from the inside corner will be equal to the length of that adjacent wall Combined intake and exhaust termination Inside corner 1 ft 305 mm min 2 ft 6...

Page 19: ...aust gas 3 ft 914 mm min B A 2 ft 610 mm min Intake air B B A Exhaust Gas A Exhaust terminations must be at least 1 ft 305 mm away from any obstructions B Intake terminations must be at least 1 ft 305 mm away from any obstructions Exhaust termination 2ft 610mm min Please follow all local and national codes in regards to proper termination clearances In the absence of such codes the clearances abov...

Page 20: ...ng 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 5 kPa 3 Always purge the gas line of any debris and or water before connect...

Page 21: ... 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...

Page 22: ...under water Immediately call a licensed professional to inspect the water heater to replace any damaged parts Do not reverse the hot outlet and cold inlet connections to the water heater This will not properly activate the water heater CAUTION 1 Shut off the manual gas valve on the gas supply line 2 Remove the screw for the pressure port located on the gas inlet of the water heater shown in the di...

Page 23: ...h the discharge tube to the pressure relief valve and run the end of the tube to within 6 inches 152 mm 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 defective pressure relief valve or it could be signs of inter...

Page 24: ...utralizer is not required 1 Connect a 1 2 FPT X 3 8 or 1 2 HB Adaptor to the condensate drain port at the bottom of the water heater 2 Connect a condensate drain tube to the 1 2 FPT X 3 8 or 1 2 HB Adaptor The manufacturer recommends the material of the condensate tube be either EPDM or PVC 3 Leave an adequate amount of space between the end of the drain tube and the actual drain to facilitate pro...

Page 25: ...ore replacement However the actual life of the neutralizer may vary depending on the application and usage Please ensure that the cartridge is properly replaced before the neutralizer elements have been completely consumed All preventative measures and safety practices must be adhered to when draining condensate The manufacturer will not be responsible for any damage caused by condensate A drain p...

Page 26: ...y 2 Qty 1 Qty 1 TEMPERATURE REMOTE CONTROLLER INSTALLATION Mounting and Wiring the Remote Controller 1 Take off the Back plate from the remote controller with a flat head screwdriver Fig A and B 2 Attach the Back plate on the wall with the two provided screws Fig B This remote controller is NOT waterproof Do not install in high temperature environments steamy conditions such as a bathroom outdoors...

Page 27: ...2 Take off the water heater s front cover 3 Locate the remote controller terminals pictured below located around the lower right hand side of the computer board 4 Take off the back plate from the remote controller and then attach the two fork terminals to connector base on the backside of the remote controller with two screws Make sure the terminals are firmly fixed 5 Pull the remote s wires throu...

Page 28: ... to 7 500 ft 7 500 to 10 100 ft DIPswitches No 3 OFF No 4 OFF No 5 OFF No 3 OFF No 4 ON No 5 OFF No 3 OFF No 4 OFF No 5 ON No 3 OFF No 4 ON No 5 ON No 3 ON No 4 ON No 5 ON OFF ON 1 2 3 4 5 6 7 8 9 10 OFF ON 1 2 3 4 5 6 7 8 9 10 OFF ON 1 2 3 4 5 6 7 8 9 10 OFF ON 1 2 3 4 5 6 7 8 9 10 OFF ON 1 2 3 4 5 6 7 8 9 10 Outdoor model Altitude 0 to 2 000 ft DEFAULT 2 000 to 4 000 ft 4 000 to 6 000 ft Over 6 ...

Page 29: ...hose other uses in order to reduce scald hazard potential Water temperature over 125 F 52 C can cause severe burns instantly or death from scalding 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 exc...

Page 30: ...odes and must meet BTU rating of water heater model used Check valve will have 1 8 inch hole drilling in clapper optional Atmospheric vacuum breaker Shutoff valve Pressure gauge Apply correct thermal expansion tank size per application Shutoff valves Shutoff valves Check valves Cold water inlet Gas inlet Water filter Drain plug Thermostatic mixing valve Hot water supply and return to heating coil ...

Page 31: ...ing unit for the first time Open the main gas supply valve to the water heater 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 quali fied service technician Forced repair may result in a fire or explosion due to gas leaks Be sure to check for the presence of leaking gas toward the bottom of the water heater because some gases ...

Page 32: ...10 F 115 F 120 F 125 F 130 F 135 F and 140 F See the troubleshooting Section for information on possible error codes 1 Temperature Remote Controller 9008172005 TM RE40 3 Pipe Cover TH PC04 4 Neutralizer Kit 9007607005 TH NT01 The neutralizer assembly neutralizes the condensate acidic water that forms in the secondary heat exchanger of the water heater It connects to the condensate drain port of th...

Page 33: ...l These terminations are special stainless steel vents for gas appliances and are UL listed as Category II III and IV For different wall thicknesses there are two ranges of lengths available Refer to the NovaVent brochure for details Install these vent terminations in accordance with their installation instructions and any applicable local codes Discription Part 4 Wall Thimble 4 7 9008345005 4 Wal...

Page 34: ... this safety manual carefully Please refer to the back of the manual for details about the warranty Keep this manual for future reference If you lose the manual contact the manufacturer or your local distributor When you call please tell us the model number and the serial number of your unit written on the rating plate of the water heater Owner s Guide ...

Page 35: ... Forced or attempted repair may result in a fire or 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 Owner s Manual 2 Turn off all electric power to the water heater 3 Do not attempt to light ...

Page 36: ... 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 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 Keep flammable products 1 Far away from heater 2 In approved containers 3 Ti...

Page 37: ...e to temperature settings 1 Open a hot water tap 2 Mix cold water with the hot to get the correct temperature water 3 Close the water taps GENERAL COLD Button HOT Button Pressthe HOT buttonorthe COLD buttontosetthehotwatertemperature ON OFF Button Press this button to start or stop operation STANDBYLED Orange The indicator turns on when the heater is ready for operation IN USE LED Green This light...

Page 38: ...ere are 2 preset temperatures 120 F 49 C and 140 F 60 C that you can select from by changing the DIPswitch settings on the computer board without the remote controller See the table below When the remote controller is in normal operation the set temperature of the remote controller is given priority over the set temperature of the DIPswitch settings The temperature has been preset at the factory t...

Page 39: ...troller will not operate temperature settings as only work for the information mode Indoor models only Operation Screen on the controller 1 Press the ON OFF button on the controller in order to turn the controller on 2 When ON the orange LED is lit 3 The previous set temperature will be displayed on the screen 4 Press the INFO buttons for at least 3 seconds 5 The set temperature should now be disp...

Page 40: ...pletely drain the water out of the water heater Refer to p 41 2 Disconnect power to your heater This will keep your water heater from freezing and being damaged Only pipes within the water heater are protected by the freeze protection system Any water pipes hot or cold located outside the water heater will not be protected Properly protect and insulate these pipes from freezing CAUTION FREEZE PROT...

Page 41: ...nician If repairs are needed any repairs should be done by a licensed technician UNIT DRAINING AND FILTER CLEANING Turn off the electrical power supply and close the manual gas shutoff valve and the manual water control valve before servicing WARNING Satisfactory Blue flame Unsatisfactory Flame blowing up Unsatisfactory Red or Yellow flame 1 Close the manual gas shutoff valve 2 Turn off power to t...

Page 42: ...nd connect hoses pump to the drain ports of the isolation valves Outlet of the pump to valve B cold side and another hose from valve A hot side to the bucket 4 PUMP and DESCALE a Fill the bucket with 5 gallons of diluted solution Dilution ratio depends on the cleaning descaling solution used b Place the pump into the bucket if it is submersible or use an inlet hose into the bucket if it is not sub...

Page 43: ...ure controller is the power button turned on 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 Is the gas supply valve fully open p 31 Is the water supply valve fully open p 31 Is the filter on cold water inlet clean p 41 Is the hot wa...

Page 44: ...l sounds from the water heater Is the correct gas type of a water heater installed p 6 Are the DIPswitch settings for your altitude set correctly p 28 Check the flame quality p 41 Is the intake or exhaust vent blocked p 10 Is the vent length and diameter correct p 11 to 16 Is the manifold pressure set correctly p 4 Unit sounds abnormal while in operation Contact the manufacturer at 1 877 737 2840 ...

Page 45: ...e water heater itself or the installation of the unit the error code will be displayed on the temperature controller and remote controller Consult with the table on the following pages for the description of each error code Example If your unit has the 321 error code which signifies an inlet thermistor failure Indicator on the controller 321 will be displayed on the screen in its entirety Green LE...

Page 46: ...tion breakage of wires Part 412 707 708 709 710 burn marks on the computer board Part 701 and or soot on the flame rod Part 108 Check if there is a buzzing spark ignition sound coming from the burner Part 101 when water heater prepares for combustion Listen for the double clunk sound coming from gas valve assembly Part 102 when the water heater goes into combustion Checkifthereisleakingfromheatexc...

Page 47: ... controller Check the model type of the remote controller Inspect the connections between the water heater and remote controller Check the power supply of the water heater 751 N A Miscommunication betweenwaterheater and temperature controller Indoor model only Inspect the connections between the water heater and temperature controller Check the power supply of the water heater 941 Five Times Abnor...

Page 48: ... remote controller Indoor model Outdoor model 702 704 052 052 052 006 704 005 052 004 004 001 007 003 050 002 001 714 002 Temperature controller Indoor model COMPONENTS DIAGRAM Components Diagram Owner s Guide 723 722 721 056 721 724 ...

Page 49: ...Page Computer board assembly Surge box assembly 709 710 103 708 402 707 701 711 716 402 407 408 060 713 706 for Indoormodel for Outdoormodel 701 710 703 120 053 705 712 712 Components Diagram Owner s Guide ...

Page 50: ...1 116 053 117 103 105 064 054 104 115 053 053 106 107 108 708 110 061 109 111 709 112 053 114 113 707 102 053 120 709 150 057 055 062 053 711 117 055 119 151 118 051 Manifold assembly Burner assembly Components Diagram Owner s Guide ...

Page 51: ...451 413 451 414 414 451 052 409 457 460 453 408 059 454 410 416 455 458 402 459 457 404 406 456 405 052 453 407 059 416 053 417 A B A B 401 154 E E 467 463 063 455 458 455 467 463 063 455 458 A 455 455 468 B 467 463 063 455 458 455 for Indoor model 418 419 465 715 464 053 Components Diagram Owner s Guide Outdoor Model Indoor Model ...

Page 52: ... Screw M4x10 Screw M3x6 SUS3 319143 059 319143 048 320273 497 319143 330 EW00D EM167 EW00P EW00B 101 102 Burner assembly Manifold with gas valve assembly LP Manifold with gas valve assembly NA 320273 353 320273 354 320273 356 EK458 EK459 EK460 103 Fan motor for Indoor model Fan motor for Outdoor model 319143 443 319143 043 EK109 EKK25 104 105 106 107 Burner gasket Fan damper for Indoor model Fan d...

Page 53: ...273 365 EK469 415 416 Drain tube Inlet heater 320273 366 319143 468 EK470 EK105 417 Secondary heat exchanger for Indoor model Secondary heat exchanger for Outdoor model 320273 553 320273 554 EK471 EK472 418 419 Secondary heat exchanger heater Heater fixing plate 320273 367 N A EK473 EK474 450 451 452 Pipe heater fixing plate Heater fixing plate 16 Fuse fixing plate N A 319143 125 N A EK475 EK031 E...

Page 54: ...rd cover Cable clamp for Indoor model 319143 481 N A 319143 191 319143 500 EK112 EX004 EKK1M EX13C 715 716 Exhaust thermistor for Indoor model Exhaust Hi limit switch wire 319143 131 319143 501 EKH6E EK180 721 722 723 724 Temperature controller for Indoor model Fixing plate Temperature remote controller Remote controller connection wire 320273 684 N A 319143 485 320273 512 EK487 EK490 TM RE40 EK48...

Page 55: ...f 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 within the United States or Canada and it is not transferable THIS WARRANTY COVERS ONLY FAILED MECHANICAL AND ELECTRICAL PARTS DUE TO FACTORY DEFECTS UNDER NORMA...

Page 56: ...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 ...