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  5. Installation Manual And Owner's Manual

Takagi T-H3-DV / 540H Installation Manual And Owner's Manual

Summary of T-H3-DV / 540H

  • Page 1

    Gas tankless water heater tm suitable for potable water heating and space-heating please refer to local codes for space-heating compliance. T-h3-dv / 540h model only if you have any questions, please call 1-888-479-8324 warning - do not store or use gasoline or other flammable vapors and liquids in ...

  • Page 2: Contents

    2 page contents 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. Keep this manual fo...

  • Page 4: Specifications

    4 page specifications *275790 pa (40 psi) or above is recommended for maximum flow. ** the manifold pressure is the factory setting and generally should not need adjustment . Note: • check the rating plate to ensure this product matches your specifications before installation. • in accordance with c...

  • 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 csa b149.1, natural gas and propane installation code. 2. Properly ground the unit in accordance with all local codes or in the absence of local codes, wi...

  • 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 csa b149.1, natural gas and propane installation code. 2. All gas water heaters require careful and correct installation to ensure safe and efficient operation. This manual must...

  • 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 check that these items below are included with the water heater. Installation manual and owner’s guide communication cable t-h3-dv / 540h only qty: 1 qty: 1 model top bottom front...

  • Page 10

    10 page the pipe cover protects the plumbing pipes to the water heater from unexpected adjustments. 6. 3 inch ulc s636 pvc concentric termination: th-cvpvc33 note: concentric (single penetration) terminations are only permitted for sidewall (horizontal) terminations. Roof (vertical) terminations mus...

  • Page 11

    11 page warning for installations installation installation manual 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 termin...

  • Page 12

    12 page high-altitude installations check the elevation where your water heater is installed. Set dip switches shown in the table below depending on the altitude. Warning please be sure to adjust the dip switches on the lower bank of the computer board of t-h3-dv / 540h for altitude setting adjustme...

  • Page 13: -General-

    13 page venting instructions -general- t-h3j-dv / 240h, t-h3s-dv / 340h, and t-h3-dv / 540h models must be vented in accordance with the section “venting of equipment" of the latest edition of csa b149.1, natural gas and propane installation code, as well as applicable local building codes. The use ...

  • Page 14

    14 page -dip switch settings for vent length- -exhaust vent (plastic vent)- these models can be vented with a plastic vent which is made of pvc, cpvc, or polypropylene (temperature rated up to 149 °f). In canada, plastic venting must be certified to ulc s636 standards. Item material canada exhaust p...

  • Page 15

    15 page • the maximum length of exhaust vent piping must not exceed 21.3 m (70 ft.) for 76 mm (3”) venting, which depends on the elevation where the water heater is installed. 30.5 m (100 ft.) for 102 mm (4”) venting (deducting 1.5 m (5 ft.) for each elbow used in the venting system). Do not use mor...

  • Page 16

    16 page 76 mm (3") vent connection diagram from 76 mm (3") to 102 mm (4") vent connection diagram -exhaust vent (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 hi...

  • Page 17

    17 page -stainless steel vent illustrations- 102 mm (4") vent connection diagram connect a 102 mm (4") stainless steel vent straight pipe directly on the exhaust and intake vent collar of the water heater. 102 mm (4”) stainless steel vent straight pipe exhaust vent collar (female)* intake vent colla...

  • Page 18: -Common-Venting System-

    18 page -common-venting system- the indoor models can be vented together using the same exhaust and intake venting. • up to 8 water heaters can be common-vented together. • a non-return valve (part no. 9008847005 ) must be used for each water heater that is part of the system. • the water heaters mu...

  • Page 19

    19 page to determine the dimension of a common-venting system determine the vent diameter (d) and the total vent length based on the number of water heaters installed. The total vent length (l) consists of the horizontal width (w) and the vertical height (h). See the table below. • total vent length...

  • 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 305mm (1 ft.) away from another exhaust termination. An exhaust termination must also be at least 610 mm (2 ft.) away from an inside corner. (if the adjac...

  • Page 22: -For Rooftop Terminations-

    22 page -for rooftop terminations- exhaust and/or direct-vent sidewall terminations should be at least 610 mm (2 ft.) away from an opposite surface/ wall. Do not place the termination directly in front of an opening into a building . Please follow all local and national codes in regards to proper te...

  • 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 t-h3j-dv / 24...

  • 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 comp...

  • Page 26: -Pressure Relief Valve-

    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, part number th-nt01. Case a: if a neutralizer...

  • Page 28

    28 page electrical connections 1. The water heater requires 120 vac, 60 hz electrical power supply that is properly grounded . 2. The use of a surge protector is recommended in order to protect the unit from power surges. Follow the electrical code requirements of the local authority having jurisdic...

  • Page 29

    29 page easy-link system (available on the t-h3-dv / 540h only) the t-h3-dv / 540h 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. • a c...

  • Page 30

    30 page 3. Select one unit to be the “parent” unit. The “parent” unit should be one of the end units. 4. “parent” unit: locate the two banks of dip switches at the bottom left of the computer board of the unit that you select to be the “parent” unit. Change dip switch no. 1 on the lower bank of dip ...

  • Page 31

    31 page (c) examples of incorrect settings and /or connections case 1: wrong dip switch 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 “...

  • Page 32

    32 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 33

    33 page multi-unit system multiple t-h3-dv / 540h units can be combined for a multi-unit system, along with the multi- unit controller (tm-mc02). The multi-unit controller can control 2 to 20 units. For a 20-unit system, the computer can modulate between the usages of 13,000 btu/h (propane) or 15,00...

  • Page 34: Applications

    34 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 7.5 l/min (2 gpm) and no more than 15 l/min (4 gpm) through each activated unit in the system....

  • Page 35

    35 page 120 vac switch or outlet hot water outlet t-handle gas shut-off valve check valve electronically controlled pump timer. Activates every 6 hours for 60 seconds. Wire to product approved pump. Heating coil (used with air-handler) cold water supply 4" gas exhaust vent (discharge must comply wit...

  • Page 36: Initial Operation

    36 page initial operation initial 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 instructions....

  • Page 37: Owner'S Guide

    37 page owner's guide 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. Keep this manual for future re...

  • Page 38: Operating Safety

    38 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. Before operating smell all around the water heater area for evidence of l...

  • Page 39: Danger

    39 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 40: Normal Operation

    40 page normal operation owner's guide normal operation temperature controller and remote controller the illustration below, shows examples of the controllers. The exact display may differ from examples. "cold" button "hot" button press the "hot" button or the "cold" button to set the hot water temp...

  • Page 41

    41 page temperature settings -set temperature- temperature table of controller normal operation owner's guide °c 38 40 43 45 50* 52 55 57 60 °f 100 105 110 115 120* 125 130 135 140 a) for t-h3j-dv / 240h and t-h3s-dv / 340h °c 38 40 43 45 50* 52 55 57 60 63 65 68 70 °f 100 105 110 115 120* 125 130 1...

  • Page 42

    42 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 43

    43 page temperature settings on the pcb (without remote controller) there are 2 preset temperatures (50 °c (120 °f) and 60 °c (140 °f)) that you can select from by changing the dip switch settings on the computer board without the temperature or remote controller. See the table below. When the tempe...

  • Page 44

    44 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 45

    45 page maintenance and service • clean the cold-water inlet filter. (refer to unit draining and filter cleaning section in this page.) • 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 ...

  • Page 46

    46 page descaling the unit hard water is a severe problem for the copper coils inside heat exchangers. Heat exchanger failure due to scale buildup from hard water conditions is not covered by warranty. It is highly suggested that a scale inhibitor be installed before the cold water inlet after this ...

  • Page 47: Troubleshooting

    47 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 48

    48 page problem solutions w ater he ater unit does not ignite when water goes through the unit. • is the power on the water heater? • is the gas on? • is the flow rate over 1.9 l/min (0.5 gpm)? (p. 40) • check for the filter on cold water inlet. (p. 45) • check for reverse connection and cross conne...

  • Page 49

    49 page error codes -general- • the water heaters have built in self-diagnostics 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 ...

  • Page 50

    50 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 ...

  • Page 51

    51 page troubleshooting owner's guide remote green led malfunction description diagnosis 311 two times outlet thermistor failure (t-h3j-dv / 240h and t-h3s-dv / 340h only) heat exchanger thermistor failure (t-h3-dv / 540h only) • check for connection/breakage of wires and/or debris on thermistor (pa...

  • Page 52

    52 page troubleshooting owner's guide remote green led malfunction description diagnosis 741 n/a miscommunication between water heater and remote controller • check the model type of the remote controller. • inspect the connections between the water heater and remote controller. • check the power su...

  • Page 53: Case Assembly

    53 page case assembly temperature remote controller 724 723 722 056 temperature controller components diagram owner's guide 052 052 003 007 002 050 702 704 008 052 050 052 717 713 004 001 004 components diagram tm-re42.

  • Page 54: Computer Board Assembly

    54 page t-h3-dv / 540h t-h3j-dv / 240h and t-h3s-dv / 340h computer board assembly surge box assembly 121 713 703 706 063 709 053 703 components diagram owner's guide 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.

  • Page 55: Burner Assembly

    55 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 t-h3-dv / 540h manifold assembly burner assembly.

  • Page 56: Water Way Assembly

    56 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 (t-h3-dv / 540h) d a e 459 454 411 412 058 f 413 452 450 414 451...

  • Page 57: Parts List

    57 page parts list item # description part # 001 002 case assembly front cover for t-h3j-dv / 240h and t-h3s-dv / 340h for t-h3-dv / 540h ek159 ek187 ek158 003 004 006 007 intake air port assembly bracket power supply cord assembly back guard panel ek170 ek162 ek171 ek161 008 009 chamber fixing plat...

  • Page 58

    58 page parts list owner's guide item # description part # 409 410 411 water outlet outlet drain plug heat exchanger thermistor for t-h3-dv / 540h ek208 ekk2e ekk2t 412 hi-limit switch for t-h3j-dv / 240h and t-h3s-dv / 340h hi-limit switch for t-h3-dv / 540h em212 ekn34 413 414 415 overheat-cut-off...

  • Page 59: Output Temperature Chart

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

  • Page 60: Limited Warranty

    60 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 representative will, at its sole discretion, repair or replace any failed or defecti...

  • Page 61

    61 page • freeze damage that occurs without taking proper preventive measures as described in the installation manual. • condensate damage due to improperly installed or lack of a condensate trap (drain). • any product not installed in compliance with all applicable local & provincial codes, ordinan...

  • Page 62

    89v012-3 if you have any questions, please call 1-888-479-8324.