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  5. Installation Manual And Owner's Manual

Takagi T-H3-DV Installation Manual And Owner's Manual

Manual is about: Condensing Models

Summary of T-H3-DV

  • Page 1

    Gas tankless water heater tm suitable for potable water heating and space-heating please refer to local codes for space-heating compliance. 540 (t-h3) models only if you have any questions, please call or write to: 500 tennessee waltz parkway ashland city, tn 37015 toll free: 1-877-737-2840 warning ...

  • Page 2: Contents

    2 page contents installation manual specifications .......................................................................................................................... 4 introduction ..................................................................................................................

  • Page 3: Installation Manual

    3 page installation manual installation manual congratulations congratulations and thank you for choosing our tankless water heater. Before use, we recommend that you read through this safety manual carefully. Please refer to the back of the manual for details about the warranty.Keepthismanualforfut...

  • Page 4: Specifications

    4 page specifications installation manual specifications *40 psi or above is recommended for maximum flow. ** the manifold pressure is the factory setting and generally should not need adjustment. Note: • checktheratingplatetoensurethisproductmatchesyourspecifications. • inaccordancewithansiz21.10.3...

  • Page 5: Introduction

    5 page introduction • this manual provides information necessary for the installation, operation, and maintenance of the water heater. • the model description is listed on the rating plate which is attached to the side panel of the water heater. • please read all installation instructions completely...

  • Page 6: Safety Guidelines

    6 page safety guidelines safety definition general 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 in the usa or can/csa b149.1 natural gas, propane installation code in canada. 2. Properly ground the unit...

  • Page 7: Installation

    7 page installation general 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 in the usa or can/csa b149.1 natural gas, propane installation code in canada. 2. All gas water heaters require careful and corre...

  • Page 8

    8 page included accessories optional items • installation and service must be performed by a qualified installer (for example, a licensed plumber or gas fitter), otherwise the warranty will be void. • the installer (licensed professional) is responsible for the correct installation of the water heat...

  • Page 9: ✓

    9 page maintain all clearances around the water heater. Clearances installation installation manual included accessories model top bottom front back sides 240indoor(t-h3j-dv) 340indoor(t-h3s-dv) 540indoor(t-h3-dv) 12 in. (305 mm) 12 in. (305 mm) 4 in.* (102 mm) 0.5 in. (13 mm) 2 in. (51 mm) 240 outd...

  • Page 10

    10 page installation installation manual the pipe cover protects the plumbing pipes to the water heater from unexpected adjustments. This pipe cover is fixed to the bottom of the water heater, which hides the plumbing and improves the visual aspects of the whole installation for the water heater. Th...

  • Page 11

    11 page warning for installations for your safety, read before installation: 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 void the warranty. Do not have the vent terminal pointing toward any opening into a b...

  • Page 12

    12 page high-altitude installations check the elevation where your water heater is installed. Set dipswitches shown in the table below depending on the altitude. Warning do not adjust any dipswitches on the upper bank for the 540 (t-h3) models. Installation installation manual note: the dark squares...

  • Page 13: -General-

    13 page venting instructions for the 240 indoor (t-h3j-dv), 340 indoor (t-h3s-dv) and 540 indoor (t-h3-dv) models -general- theindoormodelsmustbeventedinaccordancewiththesection“ventingofequipment"ofthelatest edition of the national fuel gas code: ansi z223.1/nfpa 54 in the united states and/or sect...

  • Page 14

    14 page -dipswitch settings for vent length- 4" venting vent length 240 indoor (t-h3j-dv) 340 indoor (t-h3s-dv) 540 indoor (t-h3-dv) (upper bank of dipswitches) 5 to 50 ft (default) no. 6 : on no. 7 : off no. 3 : on no. 4 : off 51 to 100 ft no. 6 : off no. 7 : off no. 3 : off no. 4 : off off on 1 2 ...

  • Page 15

    15 page -exhaust vent (abs, pvc, cpvc, or polypropylene vent)- theindoormodelscanbeventedwithabs,pvc,cpvc,orpolypropylene(temperaturerateduptoat least149°f).Ventmaterialcertifiedtoulcs636standardsisrecommendedintheusa.Incanada, plastic venting must be certified to ulc s636 standards. • themaximumlen...

  • Page 16

    16 page -two-pipe, direct-vent illustrations- for details of the optional items, refer to the installation manual for each optional item. 3"ventconnection from3"to4"ventconnection installation installation manual 3”coupling exhaust vent collar (female) 3”straightpipe 3”coupling intake vent collar (f...

  • Page 17

    17 page -single pipe with room-air intake illustrations- for details of the optional items, refer to the installation manual for each optional item. 3"ventconnection from3"to4"ventconnection installation installation manual 1. Connecta3"elbowdirectly on the intake vent collar of the water heater. 2....

  • Page 18

    18 page -exhaust vent (stainless steel vent)- thisisacategoryivapplianceandmustbeventedaccordingly.Theventsystemmustbesealedairtight. 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 ...

  • Page 19

    19 page -direct-vent and single vent illustrations- • regardingtheclearancesfromtheexhaustterminaltotheairinletoropening,refertothe next few pages. • follow all vent system manufacturer’s instructions and all local codes. • use4”categoryiii/ivapprovedorspecialbh,singleordoublewallstainlesssteelventp...

  • Page 20

    20 page -vent termination clearances- canada u.S.A direct-vent and other than direct-vent direct- vent other than direct-vent a clearance above grade, veranda, porch, deck, or balcony 1 foot 1 foot 1 foot b clearance to window or door that may be opened 3 feet 1 foot 4 feet from below or side openin...

  • Page 21: -For Sidewall Terminations-

    21 page -for sidewall terminations- for multiple sidewall exhaust terminations (e.G. Multi- unit systems), an exhaust termination must be at least 1 ft. (305mm) away from another exhaust termination. An exhaust termination must also be at least 2 ft. (610 mm) away from an inside corner. (if the adja...

  • Page 22: -For Rooftop Terminations-

    22 page -for rooftop terminations- 3 ft (914 mm) min exhaust gas intake air 1 ft (305 mm) min 1 ft (305 mm) min 2 ft (610 mm) min 1 ft (305 mm) min 1 ft (305 mm) min intake air exhaust gas 1 ft (305 mm) min exhaust and/or direct-vent sidewall terminations should be at least 2 ft. (610 mm) away from ...

  • Page 23: -General-

    23 page gas supply and gas pipe sizing -general- • the minimum and maximum inlet gas pressures are: • inlet gas pressures that fall outside the range of values listed above may adversely affect the performance of the water heater. These pressures are measured when the water heater is in full operati...

  • Page 24: -Natural Gas Supply Piping-

    24 page -natural gas supply piping- maximum delivery capacity of cubic feet of gas per hour of ips pipe carrying natural gas with 0.60 specific gravity based on pressure drop of 0.5" w.C. Based on energy content of 1,000 btu/cubic ft.: the water heater requires 160 cubic ft./hr for the 240 (t-h3j) m...

  • Page 25

    25 page -measuring inlet gas pressure- the water heater cannot perform properly without sufficient inlet gas pressure. Below are instructions on how to check the inlet gas pressure. This is only to be done by a licensed professional. Water connections all pipes, pipe fittings, valves and other compo...

  • Page 26

    26 page -pressure relief valve- the water heater has a high-temperature shutoff switch built in as a standard safety feature (called a hi-limit switch) therefore a “pressure only” relief valve is required. • this unit does not come with an approved pressure relief valve. • an approved pressure relie...

  • Page 27

    27 page -condensate drain connections- the water heater is a high efficiency condensing water heater that produces condensate (acidic water). The acidic condensate generated in the secondary heat exchanger can be neutralized by the neutralizer accessory. Case a: if a neutralizer is not required 1. C...

  • Page 28

    28 page electrical connections all indoor models come with a power plug instead of a junction box. The following procedure is for outdoor models only. 1. The water heater must be electrically grounded. Do not attach the ground wire to either the gas or the water piping. 2. The water heater requires ...

  • Page 29: -Outdoor Models Only-

    29 page temperature remote controller -outdoor models only- -installation- 1. Takeoffthe“back plate”fromtheremotecontrollerwithaflatheadscrewdriver.(fig. A and b) 2. Attachthe“back plate”onthewallwiththetwoprovidedscrews.(fig. B) installation installation manual fig. B back plate 3-1/4 inches attach...

  • Page 30

    30 page 3. Tightenthetwo"fork terminals" beneath the two "remote controller terminal" screws on the back of the main body. (fig. C-1) 4. Cut out the inlet for the remote controller cable from the bottom of the main body. (fig. C-2) 5. Placethe“main body”backonthe"back plate", with the "remote contro...

  • Page 31: 540 (T-H3) Models

    31 page 540 (t-h3) models 9008172005 (tm-re40) connect other end to these terminals 240 (t-h3j) and 340 (t-h3s) models 9008172005 (tm-re40) connect other end to these terminals installation installation manual.

  • Page 32

    32 page easy-link system (available on the 540 (t-h3) models only) the 540 (t-h3) models water heaters can be connected with allowable heaters (see the table below) with communication cables to work as a multiple-unit manifold system. • the easy-link system allows up to 4 units to manifold together....

  • Page 33

    33 page 2. Select one unit to be the “parent” unit. 3. “parent” unit : locate the two banks of dipswitches at the bottom left of the computer board of the unit that you select to be the “parent” unit. Change dipswitch no. 1 on the lower bank of dipswitches to the on position. See the computer board ...

  • Page 34

    34 page (c) examples of incorrect settings and /or connections case 1: wrong dipswitch setting on the "parent" unit case 2: wrong connections between the "parent" unit and the "child-1" unit • if you connect the "1" (or "2") connector of the “parent” unit to the “parent" (or "1") connector of the “c...

  • Page 35

    35 page case 3: wrong connections between the "child-1" unit and the "child-2" unit • if you connect the “parent” connector of the “child-1” unit to the “1” connector of the “child-2” unit, the “child-2” unit will operate as an individual unit, and will not be part of the easy-link system. Case 4: r...

  • Page 36

    36 page multi-unit system multiple 540 (t-h3) models can be combined for a multi-unit system, along with the multi-unit controller (part 9008300005 (tm-mc02)). The multi-unit controller can control from 2 units to 20 units for commercial or residential applications. For a 20-unit system, the compute...

  • Page 37: Applications

    37 page applications -space-heating applications- -recirculation- *the recirculation pump is to be controlled by: -dual-set aquastat (recommended w/timer) *the recirculation pump is to provide no less than 2 gpm (7.5 l/min) and no more than 4 gpm (15 l/min) through each activated unit in the system....

  • Page 38

    38 page -dual-purpose hot water heating- (domestic and space heating): diagrammatic layout of radiant heating and domestic water heater per mass. Code. The recirculation pump is to provide no less than 2 gpm (7.5 l/min) and no more than 4 gpm (15 l/min) through each activated unit in the system. • p...

  • Page 39: Initial Operation

    39 page initial operation initialial operation installation manual if you smell gas: • do not try to start the water heater. • do not touch any electric switches; do not use any phone in your building. • immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructio...

  • Page 40: Owner'S Guide

    40 page owner's guide congratulations congratulations and thank you for choosing our tankless water heater. Before use, we recommend that you read through this safety manual carefully. Please refer to the back of the manual for details about the warranty.Keepthismanualforfuturereference. If you lose...

  • Page 41: Operating Safety

    41 page operating safety for your safety read before operating a. This water heater does not have a pilot. It is equipped with an ignition device that automatically lights the burner. Do not try to light the burner by hand. B. Beforeoperatingsmellallaroundthewaterheaterareaforevidenceofleakinggas.Be...

  • Page 42: Danger

    42 page danger vapors from flammable liquids will explode and catch fire causing death or severe burns. Do not use or store flammable products such as gasoline, solvents or adhesives in the same room or area near the water heater. Warning the outlet hot water temperature of the water heater is facto...

  • Page 43: Normal Operation

    43 page normal operation owner's guide normal operation temperature controller and remote controller theillustrationbelowshowsanexampleofthecontrollers.Theexactdisplaymaydifferfromexamples. "cold" button "hot" button press the "hot" button or the "cold" button to set the hot water temperature. Stand...

  • Page 44

    44 page temperature settings -set temperature- temperature table of controller normal operation owner's guide °f 100 105 110 115 120* 125 130 135 140 °c 38 40 43 45 50* 52 55 57 60 a) for 240 (t-h3j) and 340 (t-h3s) models °f 100 105 110 115 120* 125 130 135 140 145 150 155 160 165 175 185 °c 38 40 ...

  • Page 45

    45 page additional features you can get some information about the water heater condition by pressing the "info" button. For more information, follow the procedures below: the remote controller has a function that can change units of temperature and flow rate from °f to °c and from gallon per minute...

  • Page 46

    46 page temperature settings on the pcb (without remote controller) there 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 ...

  • Page 47

    47 page flow • this unit comes equipped with heating blocks to protect it against damages associated with freezing. • for this freeze protection system to operate, there has to be electrical power to the unit. Damage to the heat exchanger caused by freezing temperatures due to power loss is not cove...

  • Page 48

    48 page maintenance and service • cleanthecold-waterinletfilter.(refertotheunitdrainingandfiltercleaningsectioninthispage.) • be sure that all openings for combustion and ventilation air are not blocked. • the venting system should be checked annually for any leaks, corrosion, blockages or damage. •...

  • Page 49: Troubleshooting

    49 page troubleshooting general problem solutions tempera ture and amount of ho t w ater it takes long time to get hot water at the fixtures. • 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 th...

  • Page 50

    50 page problem solutions w ater he ater unit does not ignite when water goes through the unit. • is the flow rate over 0.5 gpm (1.9 l/min)? (p. 43) • check for the filter on cold water inlet. (p. 48) • check for reverse connection and cross connection. • if you use the remote controller and/or temp...

  • Page 51

    51 page error codes -general- • the units are self-diagnostic for safety and convenience when troubleshooting. • if there is a problem with the installation or the unit, the error code will be displayed on the temperature controller and remote controller. • consult with the table on the following pa...

  • Page 52

    52 page -fault analysis of error codes- if the error code is displayed on the computer board of the water heater or remote controller and/or temperature controller, please check the following. After checking, consult with the manufacturer. Troubleshooting owner's guide remote green led malfunction d...

  • Page 53

    53 page troubleshooting owner's guide remote green led malfunction description diagnosis 391 two times air-fuel ratio rod failure • check for connection/breakage of wires (part #709) and/orsootontheafrrod(part#108). 441 two times flow sensor failure (easy-link system only) • check for connection/bre...

  • Page 54: Components Diagram

    54 page components diagram indoor models outdoor models case assembly temperature remote controller 724 723 722 056 052 052 003 007 002 050 006 704 005 052 702 704 008 052 050 052 717 702 713 004 002 001 001 004 temperature controller indoor models components diagram owner's guide.

  • Page 55: Computer Board Assembly

    55 page 540 (t-h3) models 240 (t-h3j) and 340 (t-h3s) models computer board assembly surge box assembly 121 713 703 706 063 709 053 703 711 701 713 103 709 402 707 708 714 721 407 408 701 714 403 715 721 707 722 715 402 402 103 713 708 711 709 716 716 722 402 061 components diagram owner's guide.

  • Page 56: Burner Assembly

    56 page components diagram owner's guide burner assembly 101 104 115 106 107 108 110 109 111 711 112 062 053 053 709 053 401 103 105 065 054 113 114 102 708 119 151 118 055 051 150 057 055 063 117 053 116 062 121 714 719 707 711 117 540 (t-h3) models manifold assembly burner assembly.

  • Page 57: Water Way Assembly

    57 page components diagram owner's guide water way assembly 402 460 456 461 458 404 417 407 454 405 457 406 410 455 408 458 454 462 c d 052 059 052 409 417 water outlet section water inlet section 403 456 460 458 462 b a bypass section (540 (t-h3) models) d a e 459 454 411 412 058 f 413 452 450 414 ...

  • Page 58: Parts List

    58 page parts list item # description part # 240, 340 and 540 models t-h3j, t-h3s and t-h3 models 001 case assembly for indoor models for outdoor models n/a n/a ek159 ek164 002 frontcoverfor240and340indoor(t-h3j-dvandt-h3s-dv) for 240 and 340 outdoor (t-h3j-os and t-h3s-os) for540indoor(t-h3-dv) for...

  • Page 59

    59 page parts list owner's guide item # description part # 240, 340 and 540 models t-h3j, t-h3s and t-h3 models 116 117 118 pressure port combustion chamber tube gas inlet 319143-042 319143-344 319143-455 ekk2d ex019 ek117 119 121 gas inlet ring surge box plate 319143-342 319143-522 ex00d ek163 150 ...

  • Page 60

    60 page parts list owner's guide item # description part # 240, 340 and 540 models t-h3j, t-h3s and t-h3 models 462 463 464 465 fastener“16-25a” fastener“6-15” flat heater drain tube 319143-205 319143-112 319143-535 319143-536 ekk39 ex12k ek217 ek218 466 cold pipe for 240 (t-h3j) and 340 (t-h3s) mod...

  • Page 61: Output Temperature Chart

    61 page output temperature chart chart is based on properly sized gas line 240 (t-h3j) models output temperature chart owner's guide 340 (t-h3s) models *when the set temperature is 130 °f (55 °c) or higher, maximum flow rate is limited to 8.0 gpm. 540 (t-h3) models output hot w at er gpm output temp...

  • Page 62: Limited Warranty

    62 page 1. The manufacturer warrants this product against defects in materials or workmanship as described in this document if installed within the united states or canada. The manufacturer or its authorized service representativewill,atitssolediscretion,repairorreplaceanyfailedordefectivemechanical...

  • Page 63

    63 page • freezedamagethatoccurswithouttakingproperpreventivemeasuresasdescribedintheinstallation manual. • condensatedamageduetoimproperlyinstalledorlackofacondensatetrap(drain). • anyproductnotinstalledincompliancewithallapplicablelocal&provincialcodes,ordinances,and good trade practices. • anypro...

  • Page 64

    64 page 68a161-1.