How to use your New Continuous Flow Water Heater Model 2402 (indoor unit) WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. – Do not store or use 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 electrical switch; do not use any phone in your building.
S P E C I F I C A T I O N S Type of appliance Temperature controlled continuous flow gas hot water system Operation With / without remote controls, mounted in kitchen, bathroom, etc. Exhaust system Direct Vent - Forced combustion Rinnai model number REU-2402FFU-US Maximum/Minimum gas rate (Input BTU's) 180,000 BTU's - 19,000 BTU's Natural Gas 175,000 BTU's - 20,000 BTU's Propane Gas Hot water capacity, (50°F rise) 0.6 to 6.
S P E C I F I C A T I O N S Appliance - AC 120 Volts - 60Hz. Remote control DC 12 Volts (Digital) Flame failure - Flame rod Boiling protection - 203°F Remaining flame (OHS) 194°F bi-metal switch Safety devices Thermal fuse 279°F Automatic frost protection - Bi metal sensor & anti-frost heaters Combustion fan rpm check - Integrated circuit Over current - Glass fuse (3 amp) If remote fails or becomes disconnected unit defaults to 100°F with water flowing, this is an anti-scald feature.
W A R R A N T Y Rinnai warrants the continuous Hot Water Heater Model 2402, including any parts and components thereof, to be free from any defects in materials and workmanship for the period specified below, subject to the terms specified in this warranty. This warranty gives you specific legal rights and you may also have other rights which vary from state to state.
C O N T E N T S Specifications .............................................................. 2,3 Warranty ........................................................................ 4 Owner's Installation Information ................................... 6 Features of your new Continuum ................................ 7 Safety Issues .............................................................. 8,9 Basic Operation ........................................................... 10 About Hot Water .........
O W N E R ’ S I N S TA L L AT I O N I N F O R M AT I O N This product must be installed by a Rinnai certified installer. Failure to have the product installed by a Rinnai certified installer may result in a voiding of the product's warranty. This appliance must be installed in accordance with local codes, or in the absence of local codes, the National Fuel Gas Code, ANSI Z223.1 and/or the CAN/CGA-B149, Installation Codes. Install this product indoors, DO NOT install outdoors.
F E AT U R E S O F Y O U R N E W C O N T I N U U M ) ) ) ) ) ) ) ) ) ) The Continuum 2402 is one of the most advanced water heaters available. It supplies hot water continuously at the temperature preset in the unit or at the temperature set on the optional remote control(s). Remote controls are recommended for optimum performance. The Continuum 2402 never runs out of hot water. While electricity, water and gas supplies are connected, hot water is available whenever the hot tap is open.
S A F E T Y I Always check water temperature by hand before entering the shower or bath. The temperature may have been changed. S S U E S The water temperature can only be adjusted between 96°F and 110°F when the hot water tap is open, and hot water is flowing. Do not clean Remote Controls with solvents. Use a soft damp cloth. www.rinnaiamerica.
S A F E T Y I Depending on the weather conditions and the length of the pipe between the Continuum 2402 and the tap in use, there may be a variation between the temperatures displayed at the Remote Control and the temperature of the water at the tap. S S U E S The Continuum 2402 controls the water temperature automatically. To do this it sometimes needs to change the water flow accordingly.
B A S I C O P E R T I O N 2 1 To take control of the Continuum 2402 all hot water taps must be closed. Press the "Priority button" on the Control you want to set the temperature with, and the yellow "Priority" indicator light will glow. This indicates that the Continuum 2402 is ready to supply hot water at the set temperature as soon as a tap is opened. To operate the Continuum 2402 simply turn any hot water tap on.
A B O U T H O T W A T E R Hot Water Is Dangerous, especially for the young and the elderly or the infirm. The Continuum 2402 allows you to precisely control the temperature of your hot water, ensuring safe hot water temperatures. Water Temperatures over 125°F can cause severe burns instantly or death from scalds.
R E M O T E Digital Monitor Indicates the selected water temperature. Error messages flash in the event of a failure. C O N T R O L O P E R AT I O N In Use Indicator Indicates that a hot water tap is open and that control of the temperature is taken at another controller. Priority Indicator Indicates whether this controller has priority control over the water temperature. Priority Button Pressing takes control of the water temperature by this controller.
E R R O R M E S S A G E S The Continuum 2402 has the ability to check its own operation continuously. If a fault occurs, an Error Message will flash on the Digital Monitor of the Remote Controls. This assists with diagnosing the fault, and may enable you to overcome a problem without a service call. Please quote the code displayed when inquiring about service. NOTE: Failure to remedy faults may result in severe burns, scalds, and/or death.
M A I N T E N A N C E & S E R V I C E I N F O R M AT I O N Warning: Always turn off the electrical power supply, the manual gas valve and the manual water control valve whenever servicing the unit. The Continuum 2402 should be checked by a Rinnai Certified Technician once a year. A Rinnai Certified Technician should perform any repairs that may be necessary.
M A I N T E N A N C E & S E R V I C E I N F O R M AT I O N MAINTENANCE SUGGESTIONS This water heater has been designed and constructed for a long performance life when installed and operated properly under normal conditions. Regular inspections, as outlined in this section, are strongly recommended as a means of keeping your heater operating efficiently. 1. Cleaning The water heater must be cleaned annually. Keep the water heater clear of dust and debris especially in and around burner.
TROUBLE SHOOTING AND COMMON QUESTIONS Q - I don't have any hot water when I open the tap! A - Make sure there is gas and electricity to the Continuum 2402. (the power is turned on and the gas is turned on) Q - When I was using the hot water, the water got cold! A - If you adjusted the flow from the tap to lessen it, you may have gone below the minimum flow required. The Continuum 2402 requires .6 GPM to operate.
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 is equipped with a direct 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. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor.
FOR YOUR SAFETY READ BEFORE OPERATING 7) Turn the manual valve located at the gas inlet of appliance counterclockwise to “ON”. 8) Turn on all electric power to the appliance. 9) Set thermostat to desired setting. 10) If the appliance will not operate, Follow the instructions “To Turn Off Gas To Appliance” and call your service technician or gas supplier. To Turn Off Gas To Appliance 1) Set the thermostat to lowest setting. 2) Turn off all electric power to the appliance if service is to be performed.
Installer’s Instructions This section is for the Rinnai Certified Installer only. If you are not certified you are not authorized to install this unit. The warranty may be voided due to installation by a non-certified installer. For information on becoming a Rinnai Certified Installer, call 1-800-621-9419. Contents of Installer’s Manual Warnings ............................................................ 20 Performance Data ............................................. 21 Locating the Unit .............
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S -Warnings- This manual must be followed exactly. 1) Read the safety issues completely before installing the Continuum 2402. 2) This water heater is suitable for water (potable) heating or space heating. - The piping connected to the Continuum 2402 must be approved for use in potable water systems. - Toxic chemicals such as those used for boiler water treatment are NOT to be introduced to the Continuum 2402.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S C O N T I N U U M O U T L E T F L O W D ATA I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S C O N T I N U U M P R E S S U R E D R O P C U RV E Model 2402 2 1 800-621-9419
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Locating the vent terminal RECOMMENDED VENT/AIR INTAKE TERMINAL POSITION Terminals should be so positioned as to avoid products of combustion entering openings into buildings or other flues or vents. Vent/Air IntakeTerminal positions - MINIMUM dimensions. REF DESCRIPTION DISTANCE IN INCHES A Directly below an Opening, Air Brick or Window. B Below a Gutter, Sanitary Pipework or Eaves. C From any Internal Corner.
INSTALLER’S INSTALLATION INSTRUCTIONS Dimensions Model 2402 23 800-621-9419
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S RECOMMENDED PIPING FOR INSTALLATION www.rinnaiamerica.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Venting The maximum allowable “Equivalent Length (D)” of vent pipe for the 2402 water heater is 41 feet (as determined using the formula below). If “D” is greater than 41, the vent/air intake piping is too long or there are too many elbows, redesign the vent pipe run. D = L + (B90 x 6) + (B45 x 1.5) D = L = B90 = B45 = Total Equivalent Length of vent system. Length of vent/air intake in feet. Number of 90° elbows. Number of 45° elbows.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Venting Vent/Air Intake for Continuum 2402 Hot Water Systems The only vent/air intake system approved for use with this appliance by CSA is the Rinnai/ Ubbink vent system and components. The vent system must vent directly to the outside of a building and use outside air for combustion as indicated in the diagrams below.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Gas Pipe Sizing Chart Capacity Table for Natural Gas cubic feet / hour (table assumes .3 inch pressure drop, specific gravity of .
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Gas Piping Notes 1) A manual gas control valve must be placed upon the gas inlet connection to the Continuum 2402 before it is connected to the gas line. A union can be used on the connection of the Continuum for the future servicing or disconnection of the unit. 2) Check the type of gas and the gas inlet pressure before connecting the Continuum 2402.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Water Piping Notes 1) A manual water control valve must be placed upon the water inlet connection to the Continuum 2402 before it is connected to the water line. Unions may be used on both the hot/cold water supply lines, for the future servicing or disconnection of the unit. 2) All soldering materials and piping must be compatible with potable water. 3) Purge the water line to remove from it all debris and air.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Electrical Connection Notes WARNING: The Continuum 2402 must be electrically grounded in accordance with local codes or in the absence of local codes with the most recent edition of the National Electrical Code, ANSl/NFPA 70. In Canada, all electrical wiring to the Continuum 2424 should be in accordance with local codes and the Canadian Electrical Code, CSA C22.1 Part1.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Wiring Diagram Model 2402 31 800-621-9419
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Wiring Diagram www.rinnaiamerica.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Lighting the Unit WARNING: If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or loss of life. 1) This water heater does not have a pilot. It is equipped with a direct ignition device which automatically lights the burner. DO NOT TRY TO LIGHT THE BURNER BY HAND. 2) Before operating the Continuum 2402 smell all around the unit for gas.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Remote Controls- General The remote controls for the Continuum 2402 allow the customer to control the functions of the water heater and to diagnose certain fault conditions. The Main Controller model MC-45-3US is intended to be installed in the kitchen or laundry area where the majority of the hot water is being used. NOTE: The MC-45-3US has a temperature setpoint range of 96-140°F.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Remote Controls - Installation 1) outline of remote Determine a suitable location for the control. securing screw 2) Make three holes on the wall as shown. wire hole 1 1/16 inches 3 1/4 inches securing screw 3) Run the cable between the control and the Continuum 2402 or the control and the other control. 21/32 inch 4) Remove the face plate from the remote control, using a screw driver.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Testing 1) Turn on the gas and water. 2) Check for water and gas leaks. Use soapy water to test for gas leaks. 3) Remove pressure test point screw, attach pressure gauge to test point. 4) Turn Power on. 5) Open any hot water tap fully. 6) Check test point or supply pressure in water columns per inch. Manifold Pressure: Supply pressure: Natural Gas 3.9" Hi. fire 0.31" Lo. fire Natural Gas Min. 7" Max. 10.5" LPG 5.1" Hi. fire 0.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Diagnostic Points Flow Chart N0 Measurement Point Con N0 Wire Color Normal Value Component 1 D1 Black - White AC 108 - 132 V Safety Device 2 H1 Black - Black DC 10 - 13 V Remote Control 3 J2 Red - Black DC 11 - 13 V Yellow - Black DC 2 - 10 V 4 E4 White - White DC 80 - 100 V 0.8 - 1.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Schematic Diagram (Lime Sensor) www.rinnaiamerica.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Exploded View - Cabinet Model 2402 39 800-621-9419
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Exploded View - Internals www.rinnaiamerica.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Exploded View - Internals Model 2402 4 1 800-621-9419
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Exploded View - Electrical www.rinnaiamerica.
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Parts List Number Description Part Number Quantity 002 Casing Assembly DU162-1860 1 006 Front Panel Assembly-9 DU162-111-9 1 010 Wall Fitting Bracket BU183-115-3 1 011 Wall Fitting Bracket Bottom BU162-107-2 1 013 Connection Reinforcement Panel DU162-1863 1 021 Rubber Plug AU105-113 1 022 Cable Connection BU56-602-N 1 100 Gas Connection (3/4" NPT)B CU195-211-2 1 101 Test Point Screw C10D-5 1 102 Gas C
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Parts List Number Description Part Number Quantity 116 Ignition Target AH24-341 2 117 Electrode Packing AH24-346 2 118 Electrode Holder AU129-319 1 119 Flame Rod AH24-345 1 120 Electrode Packing AH24-348 1 121 Combustion Chamber Front Plate BU155-211 1 122 Combution Chamber Braket CU162-203 1 123 Heat Exchanger Complete Assy DU162-1879 1 124 Combustion Chamber Bottom Stand BU155-227 1 125 Unit Brancke
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Parts List Number Description Part Number Quantity 403 Water Flow Servo & Sensor M8E-4-6 1 404 Joint M6H4-2 1 405 Water Solenoid Valve M6H-4 1 408 Hot Water Outlet (3/4"NPT) U211-321-2 1 409 Plug Band B AU142-445 1 410 Drain AU 142-444 1 700 PCB CU 162-1855 1 701 Surge Protector BBF9-630 1 702 Glass Fuse EP-103-33 2 706 PCB Cover CU163-608 1 707 Fuse Cover AU155-1560 1 708 Ignitor EI-145 1
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Parts List Number Description Part Number Quantity 721 Water Flow Servo Harness BU195-604 1 722 Sensor Harness BU162-1889 1 723 Modulating Solenoid Valve Harness BU162-1888 1 724 Power Harness BU162-1887 1 725 Air Inlet thermistor BH50-730 1 726 flame Rod Harness AU195-605 1 727 Cramp AU33-327-e 1 728 Power Supply Harness AU162-1890 1 801 Screw ZBA051OUK - 802 Screw ZEAB0408SZ - 804 Washer CF83-4
I N S TA L L E R ’ S I N S TA L L AT I O N I N S T R U C T I O N S Parts List Number Description Part Number Quantity 902 “0” Ring M10B-10-1015 1 903 “O” Ring (P4) MlOB-2-4 ? 904 “O” Ring (P7) MlOB-2-7 1 905 “O” Ring (P16) M10B-2-16 2 907 “O” Ring (P14) M10B-2-14 2 908 “O” Ring (P18) M10B-2-18 1 909 “O” Ring (P10) M10B-2-10 2 Manual 3/4" gas control valve BU195-1865 1 Kitchen remote control kit MC-45-3US 1 Bathroom Remote Control kit BC-45-3US 1 2nd Bathroom Remote C
A sk about Rinnai’s other fine products: The Silent Servant *North America’s only vent-free convection heater *99% efficient *whisper quiet *perfect for hard to heat areas The Energy Savers *Direct Vent Heating with style and performance *whisper quiet *available with multi-step set back thermostats The Infra-reds *Vent free radiant heaters *99.9% efficient *Heat like the sun Portable Cooking Products *One, two and two burner with broiler models. *Perfect for camping, a picnic or a tailgate party www.