C US Low Lead Content NSF/ANSI 372 SANITATION For Indoor Commercial Applications Only: This product is NOT intended for residential applications. CHS19980RiN . ....... 80 Gallon, 199,000 BTU CHS19980RiP . ....... 80 Gallon, 199,000 BTU CHS199100RiN . ..... 100 Gallon, 199,000 BTU CHS199100RiP . .....
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. Immediately call your gas supplier from a neighbor’s phone.
1. Welcome .................................................................................................................................. 4 2. Safety ....................................................................................................................................... 5 2.1 Safety Symbols ................................................................................................................... 5 2.2 Safety Precautions ............................................................
Thank you for purchasing Rinnai’s Demand Duo™ R-Series Commercial Automatic Circulating Tank Water Heater. This manual provides information on the installation, operation, and maintenance of Rinnai’s Demand Duo™ R-Series Commercial Automatic Circulating Tank Water Heater. Read this manual completely before installing or operating the system. • • You must read the entire manual to properly operate the water heater and understand maintenance requirements. • Keep this manual for future reference.
This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others. • Indicates an imminently hazardous situation which, if not avoided, will result in personal injury or death. DANGER Indicates a potentially hazardous situation which, if not avoided, could result in personal injury or death. WARNING Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury.
• Install the vacuum relief valve per local codes. Massachusetts 248 CMR Section 10.14 (I) “All potable water pressure tanks shall be provided with a vacuum relief valve at the top of the tank that will operate up to a maximum water pressure of 200 P.S.I.G. and to a maximum water temperature of 200°F (93°C).” CAUTION • BURN HAZARD. Hot exhaust and vent may cause serious burns. Keep away from the water heater unit. Keep small children and animals away from the unit.
Figure 1: Components Intake Filter Exhaust Connector (IFEC) (Supplied but not installed) Electric Conduit Pump IMPORTANT The tankless engine is to be used as a service part only for the Demand Duo™ R-Series System. RL94 is not permitted as a substitute. RLR94 is not permitted as tankless only application.
Product Number CHS19980RiN CHS19980RiP Product Description Installation Type Minimum Gas Consumption Btu/hr (kW/hr) Automatic Circulating Tank Water Heater Indoor 23,000 (6.7) Maximum Gas Consumption Btu/hr (kW/hr) 199,000 (58.3) 80 Gallons (303 Liters) 249 Gallons (942 Liters) 120°F (49°C) to 180°F (82°C) 320 lb (145 kg) 47 dB 237 W 2W 260 W 9.
Product Number CHS199100RiN CHS199100RiP Product Description Installation Type Minimum Gas Consumption Btu/hr (kW/hr) Automatic Circulating Tank Water Heater Indoor 23,000 (6.7) Maximum Gas Consumption Btu/hr (kW/hr) 199,000 (58.3) 119 Gallons (450 Liters) 276 Gallons (1046 Liters) 120°F (49°C) to 180°F (82°C) 455 lb (208 kg) 47 dB 237 W 2W 260 W 9.
Figure 2: Dimensions for 80 Gallon Storage Tank Top Models 28.02 (711.70) CHS19980RiN Ø 24.25 (615.95) CHS19980RiP Measurements below are shown in inches (millimeters). 16.52 (419.60) 29.60 (751.84) Gas 64.71 (1643.63) 1-1/2 in. MNPT Hot 63.72 in. (1618.48) B-Vent Side 62.66 (1591.56) 25.88 (657.35) PRV Temperature and Pressure Relief Valve 54.28 (1378.7) Front 4.19 (106.43) 1-1/2 in. MNPT Cold 3.54 (89.
Figure 3: Dimensions for 100 Gallon Storage Tank Models Top CHS199100RiN 33.7 (855.98) CHS199100RiP Ø 28.3 (718.82) Measurements below are shown in inches (millimeters). 18.7 (474.98) 4.20 (106.68) 1-1/2 in. MNPT Cold 37.2 (944.88) Gas* 71.1 (1805.94) 1-1/2 in. MNPT Hot 71.3 (1811.02) 6 in. B-Vent Side 69.4 (1762.76) 32.3 (820.42) PRV 56.7 (1440.18) Temperature and Pressure Relief Valve Front *The gas connection includes a 36 in. long flex line. 3.44 (87.
Topics in this section • Installation Guidelines • What You Will Need • Choose an Installation Location THIS SECTION IS INTENDED FOR THE INSTALLER Installer qualifications: A trained and qualified professional must install the appliance, inspect it, and leak test it before use. The warranty may be voided due to any improper installation.
• • • • Commercial Hybrid System Temperature and Pressure Relief Valve (pre-installed on Tank) Pressure Relief Valve (PRV) (pre-installed on Tankless Water Heater) Intake Filter Exhaust Connector (IFEC) Gas Flex/Union • • • • • • • • • • • • • Pipe Wrenches (2) Adjustable pliers Screwdrivers (2) Wire Cutters Gloves Safety Glasses Level Soap or gas leak detector solution Approved venting (6 in.
If you install this water heater in an area that is known to have hard water or that causes scale build-up, the water must be treated and may require a more frequent flushing schedule. Figure 4: Clearances Top When scale build-up in the heat exchanger begins to affect the performance of the water heater, a diagnostic code “LC#” will display. Flush the heat exchanger to prevent damage to it. Scale build up is caused by hard water set at a high temperature. 0 in. Min. 0 in. Min. 0 in. Min.
1. Choose the right hand truck to support the weight and size of the water heater. Refer to “Section 3. About” in this manual for specific weights and dimensions. 2. Use proper lifting techniques to load the water heater onto the hand truck: • Position the water heater onto the hand truck so the weight is evenly balanced and the tank is touching the rails of the hand truck. 3. Position straps around the Demand Duo tank per the requirements of California Office of the State Architect.
Topics in this section • Venting Requirements • Combustion Air Requirements • Venting Installation Checklist Poison carbon monoxide gas hazard. If this appliance is replacing a previously common vented water heater, it may be necessary to resize the existing chimney liner or vent to prevent over sizing problems for the other remaining appliance(s). See codes and/or standard having jurisdiction.
• Existing gas vent or chimney is to be checked to ensure they meet clearances and local codes. • This appliance can ONLY be connected to a manufactured chimney or vent that complies with a recognized standard. Venting into a masonry or concrete chimney is only permitted as outlined in the NFPA 54/ANSI Z223.1 National Fuel Gas Code venting tables. It is therefore a contractual obligation on the part of the installer to follow all safe venting requirements. Figure 7: Vent Pipe Assembly Vent Pipe (Min.
Support: Vent Connectors are relatively short runs of vent, connecting the appliance to the chimney or vertical vent run. Following is a list of appropriate vent connector material for use between the water heater and the chimney: Vent connectors must be supported per the vent manufacturer’s installation instructions to avoid dips or sags in the vent and maintain the required clearances. Figure 8: Slope Type B (B-Vent) Double-wall, U.L. listed vent pipe Type B (B-Vent) Single-wall, U.L.
All flue (vent) gases must be directed to the outdoors of the building or structure and must not terminate horizontally. Table 4 Roof Slope H (minimum) ft m Flat to 6/12 1.0 0.30 Over 6/12 to 7/12 1.25 0.38 Over 7/12 to 8/12 1.5 0.46 Over 8/12 to 9/12 2.0 0.61 Over 9/12 to 10/12 2.5 0.76 Over 10/12 to 11/12 3.25 0.99 Over 11/12 to 12/12 4.0 1.22 Over 12/12 to 14/12 5.0 1.52 Over 14/12 to 16/12 6.0 1.83 Over 16/12 to 18/12 7.0 2.13 Over 18/12 to 20/12 7.5 2.
Masonry Chimneys shall be built and installed in accordance with NFPA 211, Standard for Chimneys, Fireplaces, Vents and Solid FuelBurning Appliances. Before assembling the vent connector to a chimney, the chimney must be inspected for signs of obstruction or damage. If previously used for solid or liquid fuel burning appliances or fireplaces, the chimney must be cleaned. Do not connect the vent of this water heater to a chimney servicing a separate solid fuel burning appliance.
Figure 10 32 ft. (9.7 m) This water heater requires adequate combustion air for ventilation and dilution of flue gases. Failure to provide adequate combustion air can result in unit failure, fire, explosion, serious bodily injury or death. Use the following methods to ensure adequate combustion air is available for correct and safe operation of this water heater. 32 ft. (9.7 m) IMPORTANT Note: 10 ft. Ceiling Combustion air must be free of corrosive chemicals.
Figure 11 (Small Room, Closet, Alcove, Utility Room, Etc.) A confined space is defined in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 as "a space whose volume is less than 50 cubic feet per 1000 Btu/hr (4.8 m3 per kW per hour) of the aggregate input rating of all appliances installed in that space." A confined space must have two combustion air openings.
Figure 15: Indirectly through vertical ducts Outdoor air can be provided to a confined space through two permanent openings, one commencing within 12 in. (300mm) of the top and one commencing within 12 in. (300mm) of the bottom, of the confined space. The openings shall communicate to the outside by one of two ways: 1. Directly through horizontal ducts 2.
□ Verify proper clearances around the vents. □ Ensure that the Combustion Air Requirements are followed that will provide sufficient combustion air for the appliance. □ Ensure you have used the correct venting products for Category 1 and that you have completely followed the venting manufacturer’s installation instructions and these installation instructions. All installations must be vented in accordance with National Fuel Gas Code NFPA 54/ANSI Z223.
MUST DO Topics in this section • • • • • • Connect the Gas Supply Gas Operating Instructions Gas Pipe Sizing Reference Tables Connect Electricity Pump Controller Checklist for Gas and Electricity WARNING • A licensed professional must install the gas supply. • Turn off 120v power supply. • Turn off the gas. • Gas is flammable. Do not smoke or provide other ignition sources while working with gas. • Do not turn on the water heater or gas until all fumes are gone.
3. Thread the flare side of the 36 in. Gas Flex into the flare side of the Gas Flare Adapter (Figure 20). Figure 18 Figure 20 3/4 NPT Side Flare Side 36 in. Gas Flex 1. Apply a pipe sealant approved for gas to the 3/4 NPT side of the Gas Flare Adapter. Flare Side 4. Use a backer wrench to tighten all connections to the recommended torque value of 62 lbs-ft. NOTE DO NOT apply sealant to the parallel threads on the flare side of the Gas Flare Adapter. Figure 21 2.
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.
The gas supply must be capable of handling the entire gas load required at the location. Gas line sizing is based on gas type, the pressure drop in the system, the gas pressure supplied, and gas line type. For gas pipe sizing in the United States, refer to the National Fuel Gas Code, NFPA 54. The below information is provided as an example. The appropriate table from the applicable code must be used. 1.
WARNING • • • Do not use an extension cord or adapter plug with this appliance. The water heater must be electrically grounded in accordance with local codes and ordinances or, in the absence of local codes, in accordance with the National Electrical Code, ANSI/NFPA No. 70. The water heater is equipped with a three-prong (grounding) plug for your protection against shock hazard and should be plugged directly into a properly grounded three-prong receptacle.
1. Locate the electric conduit on the side of the water heater (Figure 23). 4. Install conduit into the knockout opening and pull the green, white and black wires into the box. 5. Strip the green, white, and black field supplied wires 1/2 in. Make sure the conductors are completely bare (Figure 26). Figure 23 Figure 26 2. Remove the two screws around the outlet cover. Remove the outlet cover and prewired outlet (Figure 24). Figure 24 6.
IMPORTANT Water heaters covered in this manual have been tested and approved for installation at elevations up to 5,400 ft. Failure to change the DIP switch settings for high altitude will result in improper and inefficient operation of the water heater. On the SW1 DIP switch (tan switches), set switches 2 and 3 to the values shown in the table below for your altitude (Table 5). The default setting for the appliance is 0-2,000 ft. (0-610 m) with switches No. 2 and No. 3 in the OFF position (Figure 28).
Figure 29 Slow flash indicates controller is active with no errors Tankless flow rate has dropped below 2.5 GPM Power supply is working correctly Displays set temperature Tank Recovery Pump Activated □ A manual gas control valve is placed in the gas line to the water heater. □ Check the gas lines and connections for leaks. □ Confirm that the gas inlet pressure is within limits. □ Confirm that the water heater is rated for the gas type supplied.
Topics in this section • • • • • • Pressure Relief Valve Requirements Temperature - PRV Requirements Typical Installations Piping Diagram for Basic Installations Piping Diagram for Multiple Unit Installations Connect the Water Heater to the Water Supply • Plumbing Checklist An approved pressure relief valve (PRV) (preinstalled) is required by the American National Standard (ANSI Z21.10.3) for all water heating systems and shall be accessible for servicing.
A Hot Water Outlet * B Hot Water Outlet Valve * Figure 30 B A H C Temperature-Pressure Relief Valve D Cold and Hot Unions * E Cold Water Supply Valve * F Cold Water Supply * G Thermal Expansion Tank * H 6 in.
Single Unit Circulation Note: Installation must conform to applicable codes and all requirements listed in this manual. Balancing valves, equivalent piping , pressure gauges, and temperature gauges are to be used as necessary to ensure proper flow between units. All components shall be selected for the pressure and temperature rating of the installation. Hot Water Supply Line Figure 32 6 inch.
Demand Duo™ R-Series Installation and Operation Manual 36 • • BUILDING CIRCULATION PUMP AND HOT WATER RETURN LINE (OPTIONAL) Cold Water Supply Gas Supply Installation must conform to applicable code and all requirements listed in the installation manual. Balancing valves, equivalent piping, pressure gauges, and temperature gauges are to be used as necessary to ensure proper flow between units. Common venting of this Category 1, fan-assisted appliance is permitted.
Water connections to the water heater should follow all state and local plumbing codes. If this is a standard installation, refer to section “7.4 Piping Diagram for Basic Installation.” 1. Use of this layout should provide a troublefree installation for the life of the water heater. Before making the plumbing connections, locate the COLD water inlet and the HOT water outlet. • The COLD water inlet is a 1.5 in. MNPT fitting on the lower portion of the tank below the tankless unit.
□ The water heater is not subject to corrosive compounds in the air. □ The water supply does not contain chemicals or exceed total hardness that will damage the heat exchanger. □ □ □ □ □ □ □ Balanced system piping for multiple units. □ Ensure that a pressure relief valve is installed with a rating that exceeds the BTU input of the water heater model. Refer to the rating plate on the side of the water heater for BTU input.
Topics in this section • Safety Precautions • Control Panel • Basic Operation Settings WARNING • 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. • Keep the area around the appliance clear and free from combustible materials, gasoline, and other flammable vapors and liquids. • Always check the water temperature before entering a shower or bath.
Figure 34 Indicates the water heater is in recovery 120 Display Increases hot water temperature Enables controller when multiple controllers are used Decreases hot water temperature Turns the water heater on or off A temperature lower than 120°F (49°C) can be obtained at the tap by mixing with cold water. To change the temperature scale from Celsius to Fahrenheit or vice versa, press and hold the “On/Off” button for 5 seconds while the water heater is OFF.
3. Press the (Up ) or (Down) buttons to obtain the desired temperature setting. The temperature can only be changed when either the “In Use” light or recovery pump are off. Figure 36 Water temperatures over 125°F (52°C) can cause severe burns or scalding resulting in death. Hot water can cause first degree burns with exposure for as little as: • 3 seconds at 140°F (60°C) • 20 seconds at 130°F (54°C) • 8 minutes at 120°F (49°C) Children, disabled, or elderly are at highest risk of being scalded.
To eliminate the beeps when keys are pressed follow the steps below. 1. Press and hold both the (Up) and (Down) buttons at the same time until a beep is heard (approximately 5 seconds). Then, release both buttons. To turn on the beeps, repeat the above steps. 1. To lock the controller, press and hold down the “Priority” button. 2. While holding down the “Priority” button, press the (Up) button until a beep is heard (approximately 5 seconds). Then, release both buttons at the same time.
Topics in this section • Diagnostic Codes • Replacement Parts • Service/Maintenance Log Anodes The storage tank is equipped with two magnesium anodes designed to extend the life of the storage tank. Slowly consumed over time, the anode protects the glass-lined tank from corrosion. It is strongly recommended to inspect the anodes every two (2) years. If more than half of the anodes have been consumed, they should be replaced.
This water heater is designed to display diagnostic codes. If there is a potential operation concern, refer to the code and remedy in this section. To Display Diagnostic Information To display the most recent diagnostic information codes press and hold the “On/Off” button for two seconds on the controller. While holding the “On/Off” button press the (Up) button. The last nine diagnostic codes will flash one after the other. To exit this mode press the “On/Off” and (Up) button as before.
12 No Flame • Check that the gas is turned on at the water heater, gas meter, or cylinder. • Check for obstructions in the flue outlet. • If the system is propane, make sure that gas is in the tank. • Ensure gas line, meter, and/or regulator are sized properly. • Ensure gas type and pressure are correct. • Bleed all air from gas lines. • Ensure proper venting material was installed. • Check power supply for loose connections. • Check power supply for proper voltage and voltage drops.
6 1 Combustion Fan • Ensure fan will turn freely. • Check wiring harness to motor for damaged and/or loose connections. • Measure resistance of motor winding. f f Maintenance has been performed Indicates a licensed professional performed maintenance or corrected an issue. No Code - Nothing happens when pump is activated 6 5 Water Flow Control The water flow control valve has failed to close during the bath fill function. Immediately turn off the water and discontinue the bath fill function.
Date Service / Maintenance Completed Demand Duo™ R-Series Installation and Operation Manual 47
Date Service / Maintenance Completed Demand Duo™ R-Series Installation and Operation Manual 48
Limited Warranty for Demand Duo™ R Series - CHS199100R / CHS19980R What is covered? The Rinnai Standard Limited Warranty covers any defects in materials or workmanship when the product is installed and operated according to Rinnai written installation instructions, subject to the terms within this Limited Warranty document. This Limited Warranty applies only to products that are installed correctly in the United States and Canada. Improper installation may void this Limited Warranty.
How To Obtain Service For the name of a trained and qualified professional, please contact your place of purchase, visit the Rinnai website (www.rinnai.us), call Rinnai at 1-800-621-9419 or write to Rinnai at 103 International Drive, Peachtree City, Georgia 30269. Proof of purchase is required to obtain warranty service. You may show proof of purchase with a dated sales receipt, or by registering within 30 days of purchasing the product. To register your Rinnai Tankless Water Heater, please visit www.rinnai.
04/2020 100000675(01)
