On-Demand Water Heater Installation Manual and Owner’s Guide R D R 510 model only ANSI Z21.10.3・CSA 4.3 Models • 110 Indoor • 310 Indoor • 510 Indoor • 110 Outdoor (USA Only) • 310 Outdoor (USA Only) • 510 Outdoor (USA Only) Gas Tankless Water HeaterTM Suitable for combination potable water heating and space heating. Please refer to local codes for space-heating compliance.
Contents CONTENTS Owner's Guide Installation Manual SPECIFICATIONS..............................................4 INTRODUCTION...........................................5 SAFETY GUIDELINES.....................................6 SAFETY DEFINITION.....................................6 GENERAL.......................................................6 INSTALLATION.................................................7 GENERAL.......................................................7 CLEARANCES.........................
Installation Manual Installation Manual CONGRATULATIONS Congratulations and thank you for choosing our tankless water heater. 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.
Installation Manual Specifications SPECIFICATIONS 110 Indoor Model 110 Outdoor 310 Indoor 310 Outdoor 510 Indoor 510 Outdoor Natural Gas Input (Operating Range) BTU/h Min.: 19,500 Max.: 140,000 Min.: 11,000 Max.: 190,000 Min.: 11,000 Max.: 199,000 Propane Gas Input (Operating Range) BTU/h Min.: 19,500 Max.: 140,000 Min.: 11,000 Max.: 190,000 Min.: 11,000 Max.
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/front 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 NOTICE 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. Indicates information considered important but not hazard related.
Installation Manual Installation INSTALLATION GENERAL 1. Follow all local codes, or in the absence of local codes, follow the current edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the USA or 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. The manifold gas pressure is preset at the factory.
Installation Manual Installation • 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 WARNING location where gas and water can accumulate.
Installation Manual Installation CLEARANCES Top Back Side Maintain all clearances around the water heater. Failure to do so could create a fire hazard, potentially leading to death, serious WARNING injury, and/or property damage. Front Side Bottom Model Top Bottom Front Back Sides 110 Indoor 310 Indoor 510 Indoor 12 in. (305 mm) 12 in. (305 mm) 4 in.* (102 mm) 1 in. (25 mm) 3 in. (76 mm) 110 Outdoor 310 Outdoor 510 Outdoor 36 in. (914 mm) 12 in. (305 mm) 24 in. (610 mm) 1 in.
Installation Manual Installation 1. 4” Backflow preventer and F-F adaptor: 100112416 There are two functions available for this adaptor, which can be connected with the water heater and NovaVent venting line and prevents the backflow of air through the exhaust vent. This helps prevent harmful exhaust gases from entering the home, as well as helping to prevent the unit from freezing in areas where cold air can be blown or drawn into the exhaust system.
Installation Manual Installation 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. Prohibited Do not have the vent terminal pointing toward any opening into a building. Do not locate your heater in a pit or location where gas and water can accumulate.
Installation Manual Installation HIGH-ALTITUDE INSTALLATIONS Check the altitude where your water heater is installed. Set DIP switches shown in the table below. The DIP switch settings depend on the altitude. • 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.
Installation Manual Installation VENTING INSTRUCTIONS Indoor models -General• Improper venting of this appliance can result in excessive levels of carbon monoxide which can result in severe personal injury or death. • Improper installation can cause nausea or asphyxiation, severe injury or death from carbon monoxide and flue gases poisoning. Improper installation will void WARNING product warranty. • When installing the vent system, all applicable national and local codes must be followed.
Installation Manual Installation • Do not common vent or connect any vent from other appliances to the water heater vent. 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 -Combustion air supply• The guidelines in this section apply to installations within the United States. All U.S. installations must conform to the National Fuel Gas Code, ANSI Z223.1/NFPA 54 (current edition) and local codes. • Canadian requirements differ from the guidelines in this section. In Canada, follow the requirements of B149.1 (Natural Gas and Propane Installation Code, current edition) as well as local and provincial codes.
Installation Manual Installation Your water heater’s BTU/h rating is on the rating plate. The BTU/h ratings should be on the other appliances’ rating plates. If you have trouble determining the BTU/h ratings, contact the manufacturer or have a qualified person determine the ventilation requirements. NOTICE: If you are replacing your old water heater with one that has a higher BTU/h rating, the amount of ventilation required may be greater.
Installation Manual Installation Determine type of ventilation There are several types of ventilation that can be used. The various options are listed below. See also the illustrations on the next page. 1. 2. 3. 4. 5. Direct to outdoors Vertical ducts Horizontal ducts Single opening (not recommended; must be at least 100 in2 (6.5 cm2) . Not appropriate for confined spaces smaller than 50 ft3 (1.42 m3) per 1,000 BTU/h or when getting air from another room.
Installation Manual Installation Combustion air supply options Gable vent to outdoors Install above insulation 12” (305 mm) maximum Outlet air to attic 1 in2 (6.5 cm2) per 4,000 btu/h Confined Space Two permanent Openings Alternate Air Inlet 1 in2 (6.5 cm2) per 4,000 btu/h Inlet air from the crawl space 1 in2 (6.
Installation Manual Installation -Exhaust venting- 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 350 °F (177 °C). For best results, a vent system should be as short and straight as possible. • This water heater is a Category III appliance and must be vented accordingly with any 4 in.
Installation Manual Installation -Venting illustrations- 110 Indoor, 310 Indoor, and 510 Indoor models For details of the optional items, refer to the Installation manual for each Optional item.
Installation Manual Installation -Vent termination clearancesInside corner detail V = Vent terminal X = Air supply inlet G = Area where the terminal is not permitted V D H A V L E V B B C Fixed closed Operable V F B Fixed Operable closed V B V X V B V M I J A X V K Regulator/Gas meter vent outlet B Canada Installations1 Direct vent and other than direct vent Direct vent US Installations2 Other than directdvent A Clearance above grade, veranda, porch, deck, or balcony 1 ft (30
Installation Manual Installation -Clearances for sidewall terminationsImproper installation can result in carbon monoxide poisoning or death. Follow all local and national codes in regards to proper termination clearances. In the absence of such codes, the clearances below must be met. Local codes supersede these clearances. WARNING Failure to observe this warning may result in severe personal injury or death. Exhaust Termination 1ft (305 mm) min.
Installation Manual Installation -Clearances for rooftop terminationsImproper installation can result in carbon monoxide poisoning or death. Follow all local and national codes in regards to proper termination clearances. In the absence of such codes, the clearances below must be met. Local codes supersede these clearances. WARNING Failure to observe this warning may result in severe personal injury or death. Canadian requirements differ from the guidelines in this section.
Installation Manual Installation GAS SUPPLY AND GAS PIPE SIZING -General- • Do not use this water heater with any gas other than the one listed on the rating plate. • Ensure that 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. WARNING • Conversion of this unit from natural gas to propane or vice versa will void all warranty.
Installation Manual Installation -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 140 Cubic ft/hr for the 110, 190 Cubic ft/hr for 310, and 199 Cubic ft/hr for the 510 model. Unit: Cubic feet per hour The following tables are from NFPA 54. Pipe Size Diameter: 10' (3.0) in. 1/2" 172 3/4" 360 20' (6.
Installation Manual Installation WATER CONNECTIONS WARNING NOTICE 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! Do not reverse the hot outlet and cold inlet connections to the water heater. This will prevent the water heater from activating properly.
Installation Manual Installation ELECTRICAL CONNECTIONS • • WARNING Ensure that circuit power is turned OFF before you complete the following steps. Follow the electrical code requirements of the local authority having jurisdiction. In the absence of such requirements, follow the current edition of the National Electrical Code ANSI/NFPA 70 in the U.S. or the current edition of CSA C22.1 Canadian Electrical Code Part 1 in Canada.
Installation Manual Installation 6. Locate the remote controller terminals, pictured below (located around the lower right-hand side of the computer board). 7. Open the plastic cover of the remote controller, then attach the two fork terminals to the connector base on the back of the remote controller. (See below.) Make sure that the terminals are secure. 8. Pull the remote’s cables through the hole at the bottom of the water heater’s casing. 9.
Installation Manual Installation EASY-LINK SYSTEM (510 model only) -General- The 510 model water heaters can be connected with other allowable heaters (see the table below) with communication cables to work as a multiple-unit manifold system. • The built-in Easy-Link System allows up to 4 units to manifold together. • A communication cable (gray color) comes with each 510 model. You can manifold from 2 to 4 units without the need for a multi-unit controller.
Installation Manual Installation 6. Between the “CHILD-1” and the “CHILD-2” units: Connect the “2” connector of the “CHILD-1” unit to the “1” connector of the “CHILD-2” unit. 7. Between the “CHILD-2” and the “CHILD-3” units: Connect the “2” connector of the “CHILD-2” unit to the “1” connector of the “CHILD-3” unit. 8. Verify that all cables are connected like the diagram below (B). 9. Turn on power to the “PARENT” unit. The 7-seg LED will display “1”. Turn on “CHILD-1”.
Installation Manual Applications APPLICATIONS -Space-Heating Applications• This water heater is suitable for combination water (potable) heating and space heating and not suitable for space heating applications only. • 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 WARNING flow rates are labeled next to each application diagram. These flow rate requirements must be followed.
Installation Manual Applications -Dual-purpose hot water heating(Domestic and Space Heating): Diagrammatic layout of radiant heating and domestic water heater. 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 Initial operation 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 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.
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 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.
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 appliance does not have a pilot. It is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. B. BEFORE OPERATING smell all around the appliance area for 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. Flammable Vapors FLAMMABLES Do not install water heater where flammable products will be stored or used unless the main burner is at least 18” above the floor. This will reduce, but not eliminate the risk of vapors being ignited by the main burner.
Owner's Guide Normal Operation NORMAL OPERATION GENERAL Temperatures above 125 °F (52 °C) can cause severe burns or death from scalding. Children, disabled and the elderly are at high risk of being injured. WARNING °F °C Time to produce serious burn 1. Open a cold water fixture. NOTICE 120 49 more than 5 min. 125 52 130 54 135 57 1½ to 2 min. about 30 sec. about 10 sec. 140 60 145 63 less than less than 5 sec. 3 sec. 150 66 155 68 about 1½ sec. about 1 sec. 2.
Owner's Guide Normal Operation 510 model: 100112155 (TM-RE30) 100112155 (TM-RE30) 1. Turn on the 120VAC power supply to the water heater. 2. Press the "ON/OFF" button on the remote to turn the remote controller on. It shows the time and “TIME” set temperature on the display as shown to the right. 3. Press the "HOT" button or the "COLD" button to “INFO” set the temperature. You can set the temperature from 100 °F (37 °C) “BUZZER” to 122 °F (50 °C).
Owner's Guide Normal Operation How to change to the High temperature mode 1. Turn off power to the remote controller by pressing the “ON/OFF” button. (Lamp is OFF to indicate that power is off.) 2. Press and hold both the “HOT” and “COLD” buttons simultaneously for at least 5 seconds, then make sure that “1” (or “0”) is displayed on the remote controller. I N OUT FLOW L/ M G / M I N OUT FLOW “1” is displayed for single unit. L/M G/M “0” is displayed for Easy-Link System. 3.
Owner's Guide Normal Operation -Features available only on 100112155 (TM-RE30) 1. Press the "TIME" button, then press the "HOT" or "COLD" button to set the clock time. 2. Press the "TIME" button again to save and exit. NOTE: If you want to hide the clock time, press and hold the "TIME" button for 3 seconds or longer. The remote controller has an energy saving mode.
Owner's Guide Normal Operation TEMPERATURE SETTINGS ON THE PCB -WITHOUT REMOTE CONTROLLER- There are four temperatures that you can select by changing the DIP switch settings on the computer board. See the table below. • DO NOT adjust any other DIP switches other than the ones that are indicated below. • Turn off the power supply to the water heater before changing the DIP switch settings.
Owner's Guide Normal Operation FREEZE PROTECTION SYSTEM • This unit comes equipped with heating blocks to protect it from 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 covered under the warranty. In cases where power losses can occur, consider the use of a backup power supply.
Owner's Guide Normal Operation -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 unit to the off position. 3. Failure to follow these steps could lead to fire or explosion, resulting in personal injury or death. WARNING The water heater cannot perform properly without sufficient inlet gas pressure. Below are instructions on how to check the inlet gas pressure.
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 EASY-LINK SYSTEM 510 model only REMOTE CONTROLLER WATER HEATER PROBLEM Unit does not ignite when water goes through the unit. SOLUTIONS • • • • • Is the flow rate over 0.5 GPM? (p. 37) Check for the filter on the cold water inlet. (p. 43) Check for reverse connection and cross connection. If you use the remote controller, is the power button turned on? Check if the inlet temperature is too high.
Owner's Guide Troubleshooting ERROR CODES -General• The water heaters have self-diagnostic functions for safety and convenience when troubleshooting. • If there is a problem with the installation or the unit, the 510 model will display a numerical error code on the 7-Seg LED on the computer board, and the 110 and 310 models will flash on a red LED on the computer board. If a remote controller is installed, the error codes will be displayed on the remote controller.
Owner's Guide Troubleshooting -Fault analysis of error codesIf the error code is displayed on the computer board of the water heater or remote controller, please check the following. After checking, consult with the manufacturer. 110 and 310 Red LED One Flash Five Flashes Remote 03* 510 Remote 7 Seg LED 031* 10 101 Three Flashes 11* 111* Three Flashes 12* 121* Two Flashes 31* 311* Malfunction description Diagnosis Incorrect DIP • Check the DIP switch settings on the PCB (Part #701).
Owner's Guide Troubleshooting 110 and 310 Red LED Two Flashes N/A Remote 39* 510 Remote 7 Seg LED 391* N/A 441 51 510 55 N/A 61* 611* N/A N/A 651* One Flash 70* 701* Six Flashes 72* 721* N/A 74 741 N/A N/A 761 Five Flashes 99* 991* Six Flashes Six Flashes Four Flashes Malfunction description Diagnosis Air-fuel ratio rod failure Flow sensor failure (Easy-Link System only) Abnormal gas solenoid valve Abnormal main gas valve • Check for connection/breakage of wires (Part #709
Owner's Guide Components Diagram COMPONENTS DIAGRAM Case assembly 110 Indoor 003 110 Outdoor 052 052 052 004 007 052 004 007 053 001 702 702 052 052 721 002 002 720 051 066 704 310 and 510 Indoor 704 006 053 005 052 310 and 510 Outdoor 052 052 052 004 007 052 004 007 001 052 002 056 050 050 003 001 001 053 702 702 052 721 002 720 051 066 056 704 050 050 052 Temperature remote controller 110 and 310 models 510 model 722 722 49 Page 704 006 053 005
Owner's Guide Components Diagram Burner assembly 110 model Burner assembly 101 110 108 107 106 105 065 709 104 109 111 401 712 059 053 052 706 053 121 704 053 703 059 112 705 103 053 113 114 708 150 701 Manifold Assembly 053 053 102 061 119 151 711 055 053 118 062 712 714 115 110 Indoor only 067 120 053 713 052 055 50 Page 058
Owner's Guide Components Diagram Burner assembly 310 and 510 models Burner assembly 101 107 105 108 065 709 106 104 109 110 111 401 712 053 Power control section 053 704 310 model 121 706 703 A 052 053 116 117 705 510 model 053 053 704 703 706 053 103 121 054 112 A 115 113 705 053 701 057 058 114 708 150 A Manifold Assembly 053 067 120 053 712 055 062 066 711 053 714 310 Indoor 510 Indoor Fan motor section for indoor models 102 061 053 713 119 116 151 05
Owner's Guide Components Diagram Computer board assembly 110 and 310 models 710 510 model 103 701 701 718 708 718 707 103 710 709 402 402 714 719 408 709 407 707 708 716 715 719 Water Way assembly 110 model 310 model 463 463 463 453 413 452 510 model 450 414 452 450 450 414 063 412 412 063 453 413 452 063 401 453 413 414 412 401 401 B 451 414 414 C 414 B B C C 451 458 451 462 459 403 454 411 Bypass section 460 456 053 152 154 C 153 456 460
Owner's Guide Parts List PARTS LIST Item # 001 002 003 004 005 006 007 050 051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 101 102 103 104 105 106 107 108 109 Part # Description Case assembly for 110 Indoor for 110 Outdoor for 310 and 510 Indoor for 310 and 510 Outdoor Front cover for 110 Indoor for 110 Outdoor for 310 Indoor for 310 Outdoor for 510 Indoor for 510 Outdoor Air blockage plate for 110 Indoor, 310 Indoor, and 510 Indoor Bracket Junction box Junction box inner plate Bac
Owner's Guide Parts List Item # 110 111 112 113 114 115 116 117 118 119 120 121 150 151 152 153 154 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 Part # Description Rod holder for 110 model Rod holder for 310 and 510 models Rod cap Burner damper for 110 model Burner damper for 310 Indoor and 510 Indoor Burner damper for 310 Outdoor and 510 Outdoor Manifold gasket A Manifold gasket B Fan damper for 110 Indoor Fan damper for 310 Indoor and 510 Indoor Pressure port for 310 and 510 models Combu
Owner's Guide Parts List Item # 450 451 452 453 454 455 456 457 458 459 460 461 462 463 701 702 703 704 Part # Description Pipe heater fixing plate Heater fixing plate 16 Fuse fixing plate 18 Fuse fixing plate 14 O-ring P4 FKM O-ring P6 FKM O-ring P14 FKM O-ring P15 FKM O-ring P16 FKM Fastener “4-11” for 510 model Fastener “14-22” Fastener “16A” Fastener “16-25A” for 510 model Silicon ring Computer board for 110 model for 310 model for 510 model Transformer Surge box AC120V wire for Indoor models AC120V w
Owner's Guide Output Temperature Chart OUTPUT TEMPERATURE CHART Chart is based on properly sized gas line 110 model Output Temperature vs. GPM (Max. 6.6 GPM) with Various Inlet Water Temperature (L/M) Output Hot Water GPM 8.0 50°F（10°C） 60°F（16°C） 70°F（21°C） 6.0 15 4.0 2.0 0.0 100 (38) 105 (40) 110 (43) 115 (45) 120 (50) 125 (52) 130 (55) 135 (57) 140 (60) 150 (65) 160 (70) 165 (74) 50°F（10°C） 3.9 (14.7) 4.6 (17.6) 3.6 (13.5) 4.2 (16.0) 3.3 (12.6) 3.9 (14.7) 3.1 (11.7) 3.6 (13.
