On-Demand Water Heater Installation Manual and Owner’s Guide ANSI Z21.10.3 and CSA 4.3 Model • 140 Indoor (T-H3M-DV) • 140 Outdoor (T-H3M-OS) If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, WARNING personal injury or death. Gas Tankless Water HeaterTM Suitable for potable water heating and space-heating Please refer to local codes for space-heating compliance.
Installation Manual Contents CONTENTS Installation Manual SPECIFICATIONS �������������������������������������������������������������������������������������������������������������������������������� 4 INTRODUCTION �������������������������������������������������������������������������������������������������������������������������������� 5 SAFETY GUIDELINES �������������������������������������������������������������������������������������������������������������������������� 6 INSTALLATION �������
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 for future reference. If you lose the manual, contact the manufacturer or your local distributor.
Installation Manual Specifications SPECIFICATIONS 140 Indoor Model 140 Outdoor (T-H3M-DV) (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* Natural gas Inlet Pressure Propane Inlet Pressure Manifold Pressure** Natural Gas Propane Weight psi (MPa) inch W.C. (kPa) inch W.C. (kPa) inch W.C. (Pa) 3.30 (820) 2.00 (500) inch W.C.
Installation Manual Introduction 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 before installing this product. • If you have any problems or questions regarding this equipment, consult the manufacturer or its local representative.
Installation Manual Safety Guidelines SAFETY GUIDELINES SAFETY DEFINITION DANGER WARNING CAUTION Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. Indicates an imminently hazardous situation which, if not avoided, could result in death or serious injury. Indicates an imminently hazardous situation which, if not avoided, could result in minor or moderate injury. GENERAL 1. 2. 3. 4. 5.
Installation Manual Installation 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 correct installation to ensure safe and efficient operation. This manual must be followed exactly. Read the “Safety Guidelines” section. 3.
Installation Manual Installation WARNING CAUTION • 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 heater and for compliance with all national, state/provincial, and local codes. • The manufacturer does not recommend installing the water heater in a pit or location where gas and water can accumulate.
Installation Manual Installation INCLUDED ACCESSORIES Check that these items below are included with the water heater. Installation Manual Temperature Remote Controller kit* Bird Screen and Owner’s Guide Outdoor model only Indoor model only Qty: 1 Qty: 2 Qty: 1 *For more information on optional items, please refer to p.32 to 33. CLEARANCES Maintain all clearances around the water heater. Top Back Side Side Front Bottom Model Top Bottom Front Back Sides 140 Indoor (T-H3M-DV) 12 in.
Installation Manual Installation 2 ft. (610 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. Inside Corner VENTING INSTRUCTIONS For the 140 Indoor (T-H3M-DV) model -General• Improper venting of this appliance can result in excessive levels of carbon monoxide which can result in severe personal injury or death.
Installation Manual Installation General rules for vent terminations: • Avoid locating the water heater vent termination near any air intake devices. These fans can pick up the exhaust flue products from the water heater and return them to the building. This can create a health hazard. • Locate the vent termination so that it cannot be blocked by any debris, at any time.
Installation Manual Installation -DIPswitch settings for Vent lengthSet 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. 2 inch venting Vent length Single pipe ON 1 2 3 4 5 6 7 8 9 10 5 to 6.5 ft. OFF No. 6 : ON No. 7 : ON 3 inch venting Vent length 5 to 20 ft. (DEFAULT) Two-pipe Vent length ON 1 2 3 4 5 6 7 8 9 10 5 to 45 ft. (DEFAULT) OFF No. 6 : ON No. 7 : OFF OFF 46 to 70 ft.
Installation Manual Installation -Intake and Exhaust Venting IllustrationsTypical installations using ABS, PVC, CPVC, or polypropylene vent 2 inch vent installation Vent connections for single pipe 2" straight pipe * 3" elbow with bird screen 3"x2" reducer Exhaust vent collar (Female) Intake vent collar (Female) *The water heater came with a metal screen that will fit into a 3 inch elbow. 1. Connect a 3" elbow directly on the intake vent collar of the water heater. 2.
Installation Manual Installation 3 inch vent installation Vent connections for single pipe Vent connections for two-pipe 3" straight pipe 3" coupling (included) 3" straight pipe 3" straight pipe * 3" elbow with bird screen 3" coupling (included) Intake vent collar (Female) Exhaust vent collar (Female) Intake vent collar (Female) 3" coupling (included) Exhaust vent collar (Female) *The water heater came with a metal screen that will fit into a 3 inch elbow. 1.
Installation Manual Installation Examples of installation of 3 inch & 4 inch vent Two-pipe, direct-vent Hanger Single pipe with room-air intake Hanger Wall Wall Hanger Termination Terminations Roof Roof Roof flashing Roof flashing Fire stop Fire stop Refer to pages 17 and 19 for clearance information 15 Page
Installation Manual Installation -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 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.
Installation Manual Installation -Vent termination clearancesINSIDE CORNER DETAIL V Vent terminal X Air supply inlet V Area where is not permitted G H A D E V B B B C V F V FIXED ED CLOS E BL A OPER V L V ED ABLE FIXLOSED C OPER V B B V I X M V X K J A Gas meter / regulator B A Canada Direct-vent and other than Direct-vent Directvent 1 foot 1 foot 1 foot 3 feet 1 foot 4 feet from below or side opening.
Installation Manual Installation For multiple sidewall exhaust terminations, 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 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.) 2 ft. 1 ft. (305 mm) (610mm) min. min. 1 ft. (305 mm) min.
Installation Manual Installation Exhaust and/or direct-vent sidewall terminations should be at least 2 ft. (610 mm) away from an opposite surface/ wall. Do not place the termination directly in front of an opening into a building. 2 ft. (610 mm) min. Exhaust termination 2 ft (610 mm) min. 3 ft (914 mm) min. Intake air Intake air B B B Exhaust gas A Exhaust Gas A A:Exhaust terminations must be at least 1 ft. (305 mm) away from any obstructions.
Installation Manual Installation GAS SUPPLY AND GAS PIPE SIZING -General- CAUTION • Check that the type of gas matches the rating plate first. • Ensure that any and all gas regulators used are operating properly and providing gas pressures within the specified range shown below. Excess gas inlet pressure may cause serious accidents. • Conversion of this water heater from natural gas to propane or vice versa will void all warranty. Contact your local distributor to get the correct unit for your gas type.
Installation Manual Installation -Natural Gas Supply PipingMaximum 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 120 Cubic ft./hr for the 140 (T-H3M) model.
Installation Manual Installation -Measuring inlet gas pressure1. Turn off all electric power to the water heater if service is to be performed. 2. Turn the manual gas valve located on the outside of the water heater clockwise to the off position. 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. 1. Shut off the manual gas valve on the gas supply line. 2.
Installation Manual Installation -Pressure relief valveThe 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 water heater does not come with an approved pressure 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.
Installation Manual Installation -Condensate Drain Connections- WARNING Discharge condensate (acidic water) in accordance with all local codes and common safety practices. The water heater is a high efficiency condensing model 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.
Installation Manual Installation • The condensate drain is at atmospheric pressure (non-pressurized) and therefore must be allowed to drain freely with gravity only. Please ensure that there are no blockages along the condensate drain tube. All portions of the condensate drain (neutralizer and drain tube) must be at a lower elevation WARNING than the water heater to prevent condensate water from building up inside the heat exchanger.
Installation Manual Installation TEMPERATURE REMOTE CONTROLLER Only the outdoor model comes with the temperature remote controller Check that these items below are included with the remote controller. Temperature Remote Controller* Screws Qty: 1 Manual Qty: 2 Remote Controller Cable Qty: 1 Qty: 1 9009069005/TM-RE42 *It is also an optional accessary as a second remote for the indoor model. Refer to p. 32.
Installation Manual Installation 3. Tighten the two "Fork terminals" beneath the two "Remote controller terminal" screws, which are not polarity-sensitive, 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. Place the “Main body” back on the "Back plate", with the "Remote controller cable" running out of the bottom inlet. Fig. C-1 Remote controller terminals Fig.
Installation Manual Installation HIGH-ALTITUDE INSTALLATIONS Check the elevation where your water heater is installed. Set DIPswitches shown in the tables below depending on the altitude. Indoor model Altitude 0 to 2,000 ft. (DEFAULT) ON 1 2 3 4 5 6 7 8 9 10 ON 3,000 to 5,000 ft. 1 2 3 4 5 6 7 8 9 10 OFF OFF DIPswitches 2,000 to 3,000 ft. ON 1 2 3 4 5 6 7 8 9 10 OFF 5,000 to 7,500 ft. ON 1 2 3 4 5 6 7 8 9 10 No. 3 : OFF No. 4 : ON No. 5 : OFF No. 3 : OFF No. 4 : OFF No.
Installation Manual Installation APPLICATIONS -Space-Heating Applications• In order to purge air in water pipes within a closed-loop system, an air vent and air separator should be installed in the system. Required circulation flow rates are labeled next to each application diagram. These flow rate requirements must be followed.
Installation Manual Installation -Dual-purpose hot water heating(Domestic and Space Heating): Diagrammatic layout of radiant heating and domestic water heater per Mass. code. All water piping should be insulated in accordance with 780 CMR (Massachusetts energy code) Atmospheric vacuum breaker Thermostatic mixing valve Heating Coil (used with air-handler) Check valves 50’-0” maximum distance from water heater to fan coil.
Installation Manual Installation INITIAL OPERATION FOR YOUR SAFETY, READ BEFORE OPERATING • Check the GAS and WATER CONNECTIONS for leaks before firing 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 qualified service technician. Forced repair may result in a fire or explosion due to gas leaks.
Installation Manual Installation OPTIONAL ITEMS # Model 140 Indoor (T-H3M-DV) 140 Outdoor (T-H3M-OS) 1. Temperature Remote Controller ✓ Included with the water heater 2. Pipe Cover ✓ ✓ 3. Neutralizer Kit ✓ ✓ 4. 4-inch Exhaust Sidewall Vent Terminator (Hood) and 4-inch Wall Thimble ✓ 5. 3-inch Concentric PVC Termination ✓ 6. Recess Box ✓ 1. Temperature Remote Controller: 9009069005 (TM-RE42) The temperature remote controller has three functions.
Installation Manual Installation 4.
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 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 Operating Safety OPERATING SAFETY FOR YOUR SAFETY READ BEFORE OPERATING WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. 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 leaking gas.
Owner's Guide Operating Safety 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. Keep flammable products: 1. Far away from heater 2. In approved containers 3. Tightly closed 4. Out of children's reach Vapors: 1. Cannot be seen 2. Vapors are heavier than air 3. Go a long way on the floor 4.
Owner's Guide Normal Operation NORMAL OPERATION DISPLAY OF THE CONTROLLER The illustration below shows an example of the display of the controllers. The exact display may differ from examples. "INFO" Button Display for Temperature Each time the button is pressed, the operation mode is selected in the following sequence. Inlet water temperature Outlet water temperature When the STAND BY LED is ON, the hot water set temperature will be displayed.
Owner's Guide Normal Operation TEMPERATURE SETTINGS -Using controllerOperation Screen on the controller 1. Turn on the 120 VAC power 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) Press the "HOT" button or the "COLD" button to set the temperature setting of the unit.
Owner's Guide Normal Operation ADDTIONAL FEATURES -Information modeYou can get some information about the water heater condition by pressing the "INFO" button. For more information, follow the procedures below: Operation Screen on the controller 1. Inlet water temperature will be displayed on the controller by pressing the "INFO" button. Inlet water temperature (EX.: 60 °F) 2. Outlet water temperature will be displayed on the controller by pressing the "INFO" button. Outlet water temperature 3.
Owner's Guide Normal Operation FLOW • The flow rate through the water heater is limited to a maximum of 7.0 GPM (26.5 L/min). • The temperature setting, along with the supply temperature of the water will determine the flow rate output of the water heater. • Please refer to the temperature vs. gallons per minute charts on p. 54 to determine the likely flow rates based on your local ground water temperature and your desired outlet water temperature.
Owner's Guide Normal Operation MAINTENANCE AND SERVICE WARNING Turn off the electrical power supply and close the manual gas shutoff valve and the manual water control valve before servicing. • • • • • Clean the cold-water inlet filter. (Refer to the Unit Draining and Filter Cleaning Section on 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 or damage.
Owner's Guide Normal Operation 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 procedure is done. 1) TOOLS ‐ Gather the following materials: Water a. Pump: The pump should provide a minimum of 1 Heater gpm through the heater. b. Descaling Solution c.
Owner's Guide Troubleshooting TROUBLESHOOTING GENERAL TEMPERATURE and AMOUNT OF HOT WATER PROBLEM SOLUTIONS It takes a long time to • The time it takes to deliver hot water from the water heater to your get hot water at the fixtures depends on the length of piping between the two. The longer fixtures. the distance or the bigger the pipes, the longer it will take to get hot water.
Owner's Guide Troubleshooting PROBLEM Remote controller WATER HEATER Unit does not ignite when water goes through the unit. SOLUTIONS • • • • • • Is the power on the water heater? Is the gas on? Is the flow rate over 0.5 GPM (1.9 L/min)? (p. 37) Is the filter on cold water inlet clean? (p. 41) Check for reverse connection and cross connection. (p. 22) If you use the remote controller and/or temperature controller, is the power button turned on? (p.
Owner's Guide Troubleshooting ERROR CODES -General- • The water heater has self-diagnostics for safety and convenience when troubleshooting. • If there is a problem with the 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.
Owner's Guide Troubleshooting -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. Remote 031 101 111 121 311 321 341 Green LED Malfunction description Diagnosis One Time Incorrect DIPswitch • Check the DIPswitch settings on the PCB (Part #701).
Owner's Guide Troubleshooting Remote Green LED Malfunction description Diagnosis 391 Two Times 510 Six Times 551 Six Times 611 Four Times 701 711 One Time One Time Computer board fault • Check for connection/breakage of wires (Part #711). Gas solenoid valve • Refer to the 111 and 121 error codes. drive circuit failure 721 Six Times False flame detection • Check if there is leaking from heat exchanger (Part #401).
Owner's Guide Components Diagram COMPONENTS DIAGRAM Case assembly Indoor model 003 Outdoor model 052 052 007 004 004 052 001 714 001 704 006 702 704 005 052 050 002 002 Temperature controller Temperature remote controller Indoor model 722 721 724 721 723 056 48 Page
Owner's Guide Components Diagram Computer board assembly 701 709 707 710 103 711 716 708 402 408 for Indoor model 407 for Outdoor model 713 706 402 060 Surge box assembly 120 053 712 710 703 705 701 712 49 Page
Owner's Guide Components Diagram Burner assembly Burner assembly 101 104 115 053 053 108 107 401 106 116 708 053 110 061 109 102 111 709 112 117 053 103 105 Manifold assembly 114 113 053 064 707 054 150 119 120 709 151 057 055 062 053 055 117 051 711 50 118 Page
Owner's Guide Components Diagram Water Way assembly Outdoor Model Indoor Model 417 455 467 412 063 154 452 063 417 463 455 063 458 463 152 455 B 418 467 455 E 455 458 467 455 A 458 455 A 053 463 455 467 063 458 153 463 B 419 465 466 064 715 464 413 450 053 for Indoor model A 053 451 413 401 B 411 058 E 451 C 414 460 462 468 052 461 D 451 408 059 403 052 51 Page 402 459 D 457 456 406 404 405 416 409 415 414 453 457 C 451 413 458 455 454 4
Owner's Guide Parts List PARTS LIST Item # 001 002 003 004 005 006 007 050 051 052 053 054 055 056 057 058 059 060 061 062 063 064 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 Part # Description Case assembly for Indoor model Case assembly for Outdoor model Front cover for Indoor Front cover for Outdoor Intake air port assembly Bracket Junction box Power supply cord assembly Back guard panel Screw M4×12 (W/Washer) Screw M4×10 (W/Washer) Screw M4×10 (Coated) Screw M4x10
Owner's Guide Parts List Item # Part # Description 140 model T-H3M model 150 151 152 153 154 401 O-ring P18 NBR (Black) O-ring P20 NBR (Black) Silicon ring for Outdoor model Exhaust port for Outdoor model Silicon ring Heat exchanger assembly for 140 Indoor and Outdoor 319143-350 319143-057 319143-370 319143-121 319143-065 320273-556 EZP18 EK042 EK442 EX13J EKN50 EK467 402 403 404 405 406 407 408 409 410 411 Flow adjustment valve / Flow sensor Condensate drain port Water inlet Inlet drain plug Inle
Owner's Guide Parts List Item # Part # Description 140 model T-H3M model 701 Computer board 320273-369 EK480 702 703 704 707 708 709 710 Rubber grommet Surge box 120 VAC wire for Indoor model 120 VAC wire for Outdoor model 120 VAC Power ON-OFF switch Remote controller wire for Indoor model Remote controller wire for Outdoor model Gas valve wire Flame rod wire Igniter assembly Freeze protection thermostat 319143-426 320273-128 319143-427 319143-546 319143-141 320273-376 319143-473 320273-379 3202
Owner's Guide Warranty LIMITED WARRANTY 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.
• 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, ordinances, and good trade practices. • Any product sold to or installed in areas outside of the fifty states (and the District of Columbia) of the United States of America and Canada.
