Takagi 140 Indoor, Installation Manual And Owner'S Manual

Page 1: ...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 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 Installation...

Page 2: ... WATER CONNECTIONS 30 Pressure relief valve 30 CONDENSATE DRAIN 31 Condensate drain connections 31 ELECTRICAL CONNECTIONS 33 TEMPERATURE REMOTE CONTROLLER 33 Included accessories 33 Installation 34 APPLICATIONS 35 Space heating applications 35 Recirculation 35 Dual purpose hot water heating 36 INITIAL OPERATION 37 Owner s Guide OPERATING SAFETY 39 NORMAL OPERATION 41 BUILT IN AND REMOTE CONTROLLER...

Page 3: ... Before use we recommend that you read through this installation manual carefully Keep this manual for future reference If you need an additional manual contact the manufacturer or your local distributor When you call please tell us the product name and the serial number of your unit written on the rating plate of the water heater ...

Page 4: ...o four categories based on static pressure produced in the vent and flue loss Category I a water heater that operates with a non positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent Category II a water heater that operates with a non positive vent static pressure and with a vent gas temperature that may cause excessive condensate pro...

Page 5: ...agram illustrates tankless water heater design concepts only and does not accurately represent the water heater s physical description 1 A hot water fixture is turned on 2 Water flows through the heater 3 The water flow sensor detects the water flow 4 The computer initiates the fan motor and gas valve to let gas flow through the heater and sends a signal to the igniter to create an ignition spark ...

Page 6: ...or or moderate injury Indicates an imminently hazardous situation which if not avoided will result in death or serious injury DANGER Indicates information considered important but not hazard related NOTICE 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 50 C from the factory to minimize any scalding risk Befor...

Page 7: ...venting is required 9 The 140 Indoor model is to be installed indoors only The model is equipped with a thermistor and hi limit switch for the exhaust gas detecting excess temperatures within the flue and enabling the water heater to safely stop operation if needed These components are always monitoring exhaust gas conditions in order to prevent heat damage to ABS PVC solid core CPVC solid core or...

Page 8: ...ter heater in case of leaks Failure to observe these warnings could result in severe personal injury death and or property damage WARNING The warranty will not cover damage caused by water quality Only potable water 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 grains per gallon 12...

Page 9: ...ding to death serious injury and or property damage WARNING 24 inches recommended for maintenance Model Top Bottom Front Back Sides 140 Indoor 12 in 305 mm 12 in 305 mm 4 in 102 mm 1 in 25 mm 3 in 76 mm 140 Outdoor 36 in 914 mm 12 in 305 mm 24 in 610 mm 1 in 25 mm 3 in 76 mm Model 140 Indoor 140 Outdoor 1 Temperature Remote Controller Included with the water heater 2 Pipe Cover 3 Neutralizer Kit 4...

Page 10: ...ator Hood and Wall thimble These are used when venting out through the wall 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 a...

Page 11: ...verhang must be open to three sides Outdoor model only Do not install next to a dryer or any source of airborne debris that can be trapped inside the combustion chamber unless the system is direct vented Prohibited Prohibited 3 ft 914 mm Water heater vent terminator must be at least 2 ft 610 mm away from an inside corner for both outdoor installation and direct vent installation USA 1ft 30cm min C...

Page 12: ... 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 No 3 OFF No 4 OFF No 5 OFF No 3 OFF No 4 OFF No 5 ON No 3 ON No 4 OFF No 5 ON HIGH ALTITUDE INSTALLATIONS WARNING Adjust the appropriate DIP switches according to model and elevation as shown below DO NOT adjust the other DIP switches Turn off the power supply to the water heater before changing the DIP switch settings F...

Page 13: ...l service and inspection of the unit The water heater vent must not be connected to any other gas appliance or vent stack Avoid using an oversized vent pipe or using extremely long runs of the pipe unless it is part of an approved common vent system Air supply pipe can be made of ABS PVC solid core CPVC solid core polypropylene corrugated stainless steel or Category lll IV stainless steel Regardin...

Page 14: ...rosive chemicals are not present at the air intake Presence of such chemicals at the air intake could result in death personal injury or property damage Examples of locations that require outside air due to chemicals include Beauty salons Photo processing labs Indoor pools Laundry hobby or craft rooms Chemical storage areas Products such as aerosol sprays detergents bleaches cleaning solvents gaso...

Page 15: ...outside ventila tion if you want to provide combustion air with outside ventilation If the air volume of the room is greater than the required air volume it may be possible to install the water heater without outside ventilation However be sure to consider the effects of exhaust fans Exhaust fans can affect the amount of combustion air that is available in your home Appliances such as furnaces who...

Page 16: ...hese rules to ensure that vents and ducts provide adequate air flow Each vent opening must be no smaller than 100 in2 645 cm2 Ducts must have the same cross sectional area as free area of the opening Rectangular ducts must have a minimum dimension of no less than 3 in 76 mm All screens must have mesh or larger Moveable louvers must be locked open or interconnected with the equipment so that they o...

Page 17: ...Space 12 305mm maximum Gable vent to outdoors Install above insulation Figure 5 SIngle opening Confined Space 1 in2 6 5 cm2 per 3 000 btu h Alternative Opening Location Figure 6 Two permanent openings Two permanent Openings 1 in2 per 1 000 btu h 12 305mm maximum 12 305mm maximum Confined Space Figure 4 Horizontal duct openings 1 in2 6 5 cm2 per 2 000 btu h Confined Space Outlet Inlet Outdoor Air Duct...

Page 18: ...venting which depends on the elevation where the water heater is installed and 100 ft 30 5 m for 4 inch venting deducting 5 ft 1 5 m for each elbow used in the venting system Do not use more than 5 elbows See the table below When the horizontal vent run exceeds 5 ft 1 5 m support the vent run at 3 ft 0 9 m intervals with overhead hangers For each elbow added deduct 5 ft 1 5 m from max vent length ...

Page 19: ...he 3 inch elbow is supplied with the indoor water heater 3 elbow with bird screen Intake vent collar Female 3 x2 reducer 2 straight pipe Exhaust vent collar Female DIP switch settings for vent length Typical installations using PVC CPVC ABS or polypropylene vent WARNING Adjust the appropriate DIP switches according to vent size and vent length as shown below DO NOT adjust the other DIP switches Tu...

Page 20: ...0 No 6 ON No 7 OFF 51 to 100 ft 15 3 to 30 5 m OFF ON 1 2 3 4 5 6 7 8 9 10 No 6 OFF No 7 OFF Direct vent Single vent with room air intake Terminations Wall Hanger Hanger Termination Wall Hanger Examples of installation of 3 inch 4 inch vent WARNING Adjust the appropriate DIP switches according to vent size and vent length as shown below DO NOT adjust the other DIP switches Turn off the power suppl...

Page 21: ...take and exhaust vent collars 2 Connect 4 straight pipes to the increasers 4 straight pipe 3 x4 increaser Exhaust vent collar Female Intake vent collar Female 4 straight pipe 3 x4 increaser 4 straight pipe 3 x4 increaser Exhaust vent collar Female 3 elbow with bird screen Intake vent collar Female 1 Connect a 3 elbow directly on the intake vent col lar of the water heater 2 Connect a 3 x4 increase...

Page 22: ... Stainless steel vent This is a Category IV appliance and must be vented accordingly The vent system must be sealed airtight All seams and joints without gaskets must be sealed with high heat resistant silicone sealant or UL listed aluminum adhesive tape having a minimum temperature rating of 160 F For best results a vent system should be as short and straight as possible The Indoor model is a Cat...

Page 23: ...cal installations using stainless steel vents WARNING Adjust the appropriate DIP switches according to size and vent length as shown below DO NOT adjust the other DIP switches Turn off the power supply to the water heater before changing the DIP switch settings Failure to observe these warnings could lead to carbon monoxide poisoning or death Vertical Installation Roof Roof flashing Fire stop Rain...

Page 24: ...ntake DV concentric termination 12 18 305 457 mm adjustability 100112551 2NVHTC43 2SVSHTC43 4 102mm Adjustablestraightpipe 10 18 254 457 mm adjustability 100112405 2NVAL4 2SVSPA04 4 102 mm Sidewall termina tion adjustable pipe 100187853 2NVBV4 n a 4 102 mm 45 degree elbow 100112401 2NVE445 2SVEEWCF0445 4 102 mm Wall Thimble 3 6 76 152 mm wall thickness 100187852 2NVBT4 n a 4 102 mm 90 degree elbow...

Page 25: ...or to side of opening 1 ft 30 cm above opening K Clearance to mechanical air supply inlet 6 ft 183 cm 3 ft 91 cm above if within 10 ft 3 m horizontally L Clearance above paved sidewalk or paved driveway located on public property 7 ft 213 cm 7 ft 213 cm 7 ft 213 cm M Clearance under veranda porch deck or balcony 1 ft 30 cm 1 ft 30 cm 1 ft 30 cm Clearance in accordance with local installation codes...

Page 26: ...0mm min 1ft 305mm min 1ft 305mm min Inside corner Inside corner Anticipated Snow level 2ft 610mm min 1ft 305mm min 1ft 305mm min Combined intakeand exhaust termination For direct vent sidewall terminations that use two separate penetrations for the intake and exhaust keep the termination clearances shown in the diagrams on the right The installation is for only 3 inch and 4 inch vent installations...

Page 27: ...ING 3 ft 914 mm min Exhaust gas Intake air 1ft 305mm min 1 ft 305 mm min Anticipated snowlevel Flat roof termination Exhaust gas 2 ft 610 mm min Intake air 1ft 305mm min 1 ft 305 mm min 1 ft 305 mm min Anticipated snowlevel Angled roof termination Vertical wall Anticipated snow level 1 ft 305 mm min 1 ft 305 mm min 2ft 610mm min 2 ft 610 mm min 1ft 305mm min 1 ft 305 mm min 1 ft 305 mm min 1 ft 30...

Page 28: ...y pressure to the heater is greater than the specified maximum a field supplied regulator is required The regulator must lower the gas pressure within the approved range Install the gas regulator according to the manufacturer s instructions The regulator must be sized for the water heater input and provide the specified pressures that are listed on the rating plate In the absence of minimum instal...

Page 29: ... 162 146 132 112 1 25mm 1 071 732 590 504 448 409 378 346 322 307 275 252 213 1 1 4 32mm 2 205 1 496 1 212 1 039 913 834 771 724 677 630 567 511 440 1 1 2 38mm 3 307 2 299 1 858 1 559 1 417 1 275 1 181 1 086 1 023 976 866 787 675 2 51mm 6 221 4 331 3 465 2 992 2 646 2 394 2 205 2 047 1 921 1 811 1 606 1 496 1 260 Based on Energy Content of 1 000 BTU Cubic ft Divide each appliance s BTU h requireme...

Page 30: ...re relief valve An approved pressure relief valve must be installed on the hot water outlet The pressure relief valve must conform to ANSI Z21 22 or CAN 1 4 4 and installation must follow local codes The discharge capacity must be at least 120 000 BTU h for the 140 model The pressure relief valve needs to be rated for a maximum of 150 psi 1 MPa The discharge piping for the pressure relief valve mu...

Page 31: ...ndensate acidic water in accordance with all local codes and com mon safety practices Use corrosion resistant pipe such as PVC for the condensate drain line Do not use metal pipe The condensate drain does not require a trap Maintain a downward slope on the drain line s including installations in which the drain is not directly below the water heater A field supplied bypass is required if a neutral...

Page 32: ...ents have been completely consumed All preventative measures and safety practices must be adhered to when draining condensate Themanufacturerwillnotberesponsibleforanydamagecausedbycondensate A drain pan or other means of protection against water damage is recommended to be installed under the water heater in case of leaks NOTICE 2 50 mm MIN distance Connect to the condensate drain port Refer to p...

Page 33: ... water piping 2 The water heater requires a 120 VAC 60 Hz electrical power supply that is properly grounded A proper disconnect i e on off switch power plug etc controlling the main power to the water heater must be provided for service reasons Must comply with local codes Connect the power supply to the water heater exactly as shown in the wiring diagram 3 A green screw is provided in the junctio...

Page 34: ... long NOTICE 4 Tighten the two Fork terminals beneath the two Remote controller terminal screws on the back of the main body Fig D 1 5 Cut out the inlet for the remote controller cable from the bottom of the main body Fig D 2 6 Place the Main body back on the Back plate with the Remote controller cable running out of the bottom inlet firmly fixed See the above instructions for installation of the ...

Page 35: ...reviously used with non potable water where any chemicals were added to the water heating appliances When the system requires 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 52 C can cause severe burns instantl...

Page 36: ...local codes 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 heatin...

Page 37: ...are ready to enjoy hours of endless hot water Check the GAS and WATER CONNECTIONS for leaks before firing unit for the first time Open the main gas supply valve to the unit 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 qualified service technician Forced repair may result in a fire or explosion due to gas leaks Be sure to ch...

Page 38: ...efore use we recommend that you read through this owner s guide carefully Keep this manual for future reference If you need an additional manual contact the manufacturer or your local distributor When you call please tell us the product name and the serial number of your unit written on the rating plate of the water heater ...

Page 39: ...empted repair may result in a fire or explosion D Do not use this appliance if any part has been under water Immediately contact a qualified installer or service agency to replace a flooded water heater Do not attempt to repair the unit It must be replaced 1 STOP Read the safety information above on this label 2 Turn off all electric power to the appliance 3 Do not attempt to light the burner by h...

Page 40: ...2 In approved containers 3 Tightly closed and out of reach of children 4 Water heater has a main burner which may come on at any time and will ignite flammable vapors Vapors 1 Cannot be seen 2 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 Do not install water heater where flammable products will be stored or used unless the m...

Page 41: ...l Operation Owner s Guide When the remote controller is installed it will take priority over the built in controller The controller has an energy saving mode Five minutes after the water heater stops operating the backlight of the controller turns off The backlight of the remote will turn back on once the water heater begins firing again NOTICE GENERAL 1 Open a cold water fixture 2 Mix hot water w...

Page 42: ...wer supply to the water heater 2 Press the ON OFF button on the controller in order to turn the controller on 3 When ON the STAND BY LED is lit 4 It shows the set temperature on its display as shown in the picture on the right EX 120 F EX 120 F 5 Press the HOT button or the COLD button to set the temperature setting of the unit Increasing temperature from 120 F 50 C to 125 F 52 C 1 The water heate...

Page 43: ...xample temperature can be changed from F to C Flow rate will also change from gallons per minute to liters per minute when this setting is changed Follow this procedure to change this setting When the water heater is connected with the remote controller the built in controller will not operate temperature settings It will only work for the information mode Indoor model only NOTICE INFO BUTTON Oper...

Page 44: ...ely to mini mize the amount of cold air entering through the exhaust venting when the water heater is off It is the installer s responsibility to be aware of freezing issues and take all preventative measures The manufacturer will not be responsible for any damage to the heat exchanger as a result of freezing If you will not be using your heater for a long period of time 1 Completely drain the wat...

Page 45: ... the supply dynamic gas pressure with all gas burning equipment running at maximum rate 7 The static and dynamic pressures should be within the ranges specified on the heater s rating plate and the table on p 28 8 The difference of static to dynamic pressure should not exceed 1 5 W C Pressure drops that exceed 1 5 W C can indicate restricted gas flow undersized gas lines and or undersized supply r...

Page 46: ...ot water Is the gas supply valve open fully p 37 Is the water supply valve open fully p 37 Is the filter on the cold water inlet clean p 45 Is the hot water fixture open sufficiently to draw at least 0 5 GPM 1 9 L min through the water heater p 41 Is the unit frozen p 44 Is there enough gas in the tank cylinder For Propane model Is it plumbed backwards with reverse plumbing The hot water turns col...

Page 47: ...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 a description of each error code Error code indicator on the built in remote controller Green LED Error code on the computer board Indicated by 1 2 second flashes on the Green LED Example If your unit has a 321 er...

Page 48: ...t 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 Checkifthereisleakingfromheatexchanger Part 401 Check that...

Page 49: ...el 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 betweenthewater heaterand built in 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 Abnormal exhaust temperature I...

Page 50: ...re remote controller Built in controller Indoor model COMPONENTS DIAGRAM Components Diagram Owner s Guide 723 722 721 056 721 724 702 704 052 052 052 006 704 005 052 004 004 001 007 003 050 002 001 714 002 Indoor model Outdoor model ...

Page 51: ...Page Computer board assembly Surge box assembly Components Diagram Owner s Guide 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 ...

Page 52: ...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 53: ...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 54: ...EK191 061 062 063 064 Pan screw M4x8 MFZN Wire clamp 60 Truss tapping screw M4x10 S coated Screw M3x6 SUS3 Binding head 100074526 100074233 N A 100074514 EW00D EM167 EW00P EW00B 101 102 Burner assembly Manifold with gas valve assembly LP Manifold with gas valve assembly NA 100076314 100076315 100076317 EK458 EK459 EK460 103 Fan motor for Indoor model Fan motor for Outdoor model 100074606 100074228...

Page 55: ...eater 100076326 EK469 415 416 Drain tube Inlet heater 100076327 100074629 EK470 EK105 417 Secondary heat exchanger for Indoor model Secondary heat exchanger for Outdoor model 100076507 100076508 EK471 EK472 418 419 Secondary heat exchanger heater Heater fixing plate 100076328 N A EK473 EK474 450 451 452 Pipe heater fixing plate Heater fixing plate 16 Fuse fixing plate N A 100074310 N A EK475 EK031...

Page 56: ...FC6 Computer board cover Cable clamp for Indoor model 100074642 N A 100074375 N A EK112 EX004 EKK1M EX13C 715 716 Exhaust thermistor for Indoor model Exhaust Hi limit switch wire 100074316 100074659 EKH6E EK180 721 722 723 724 Temperature controller for Indoor model Fixing plate Temperature remote controller Remote controller connection wire 100076567 N A 100209924 100076471 EK487 EK490 TM RE42 EK...