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Direct Vent Tankless Water Heater
Operation and Installation Manual
R50LSi ............... REU-VA2019FFUD
R75LSi ............... REU-VA2528FFUD(A)
R94LSi ............... REU-VA2535FFUD
R98LSi ............... REU-VA3237FFU
R98LSi-ASME.... REU-VA3237FFU-ASME
FOR INDOOR APPLICATIONS ONLY
Table of Contents ....................2
Consumer Safety Information ..4
Operating Instructions..............5
Maintenance ............................12
Error Codes .............................13
Inst
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R This model has been built in accordance with REU-VA3237FFU-ASME the requirements of the ASME Boiler and Pressure Vessel Code and has received the Certificate of Authorization from the National Board. The heat exchanger on this unit has the NB and HLW stamps. Table of Contents Specifications......................................................3 Installation Instructions....................................17 Consumer Safety Information General Instructions .......................
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Specifications R98LSi- Model R75LSi R98LSi R50LSi R94LSi ASME Minimum Gas Consumption Btu/h 15,000 19,000 199,000 Natural Maximum Gas Consumption Btu/h 150,000 180,000 Gas 237,000 190,000 Propane 0.6 - 5.0 GPM 0.6 - 7.5 GPM 0.6 - 9.4 GPM 0.6 - 9.8 GPM Hot water capacity (Min - Max) * (2.3 - 18.9 L/min) (2.3 - 28.4 L/min) (2.3 - 35.5 L/min) (2.3 - 37 L/min) 5.0 GPM 6.7 GPM 7.1 GPM 8.5 GPM Hot water capacity (45°F rise) (18.9 L/min) (25.4 L/min) (27.0 L/min) (32.2 L/min) Def
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Consumer Safety Information Safety Definitions 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 death or DANGER serious injury. Indicates a potentially hazardous situation which, if not avoided, could result in death or WARNING serious injury. Indicates a potentially hazardous situation which, if not avoi
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MC-502 BC-100 MC-100 MCC-91 MC-91 Description of Operation The Rinnai water heater is one of the most advanced Installation of the temperature controller is highly water heaters available. It provides a continuous recommended. The temperature controller can set the supply of hot water at a preset temperature. This temperature within a specific range and can provide appliance is direct vent where air is brought in from the error codes to diagnose any problems. outside and combust
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Temperature Controllers - Models MC-91-1US & MCC-91-1US Dimensions (inches): 3.5 W x 4.75 H x 0.75 D The MC-91 controller is the standard temperature controller that is supplied with the water heater. On indoor models it is integrated into the front panel. The MCC-91 controller is for commercial and hydronic applications requiring higher temperatures. When the MCC-91 controller is connected, these higher temperatures are available on all controller models in the system
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Temperature Controllers - Models BC-100V-1US Dimensions (inches): 8.0 W x 4.125 H x 0.875 D The BC-100V controller is water resistant. Avoid splashing the controller. NOTICE Temperature Water Smart In Use Display Bath Fill Indicator Indicator ON/OFF Priority Button Button and Indicator Water Smart Bath Fill Call Button Power Save Clock Water Volume Thermostat Sound Volume MC-100V-1US Dimensions (inches): 5.0 W x 4.75 H x 0.75 D Thermostat In Use Indicator Function Temp
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Setting the Temperature Hot water can be dangerous, especially for infants or children, the elderly, DANGER or infirm. There is hot water scald potential if the thermostat is set too high. Water temperatures over 125º F (51º 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 140º F (60º C) 20 seconds at 130º F (54º C) 8 minutes at 120º F (48º C) Test the temperature
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Temperature Ranges This water heater will attempt to provide hot water at the temperature setting even when the water flow is varied or when more than 1 tap is in use. The water heater can deliver water at only one temperature setting at a time. The available temperatures for a given model are provided below. Model Temperature Settings Available (ºF) R50LSi 150 160 98 100 102 104 106 108 110 115 120 125 130 135 140 R75LSi * * R94LSi 150 160 185 R98LSi 98 100 1
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Using the Water Smart / Bath Fill Function The bath fill function will not work Overview NOTICE properly if it is connected to multiple water heaters. The tub will overfill This function is exclusive to the BC-100V temperature Multiple because the bath fill function is not controller. The bath fill function allows the consumer able to measure the water volume to fill a tub with a preset volume of water at a preset Water when connected to multiple water temperature.
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Using the Water Smart / Bath Fill Function Filling the Tub 1. Press the “Water Smart / Bath Fill” To stop the water flow during the Bath NOTICE button once. The button will Fill function, press the “Water Smart / illuminate, a tone will sound, and Bath Fill” button. The button will flash the word “Bath” will appear next to To Stop the and the voice prompt will announce, the temperature setting. “Hot water is not available. Turn off Bath Fill all hot water taps an
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Maintenance Snow Accumulation WARNING Keep the area around flue terminal free of snow and Turn off the electrical power supply, the manual gas ice. The appliance will not function properly if the valve and the manual water control valve whenever intake air or exhaust is impeded (blocked or partially servicing the unit. blocked) by obstructions. Repairs and maintenance should be performed by a Visual Inspection of Flame qualified service technician. The
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Error Codes The Rinnai water heater has the ability to check its own operation continuously. If a fault occurs, an error code will flash on the Display of the temperature controller. This assists with diagnosing the fault and may enable you to overcome a problem without a service call. Please identify the code displayed when inquiring about service. Some of the checks below may need to be done by a qualified service technician. Call a WARNING service technician for any remedy th
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Code Fault Remedy 14 Thermal Fuse Check gas type of unit and ensure it matches gas type being used. Check for restrictions in air flow around unit and vent terminal. Check for low water flow in a circulating system causing short-cycling. Ensure dip switches are set to the proper position. Check for foreign materials in combustion chamber and/or exhaust piping. Check heat exchanger for cracks and/or separations. Check heat exchanger surface for hot spots which indicate blockage due to sc
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Trouble Shooting for Common Issues I don’t have any hot water when I open the tap. When I open a hot tap, I do not immediately get hot water. Make sure there is gas, water, and electricity to the Rinnai water heater (power is turned on and the gas is Hot water must travel through your plumbing from the turned on). Rinnai water heater to the faucet. The time period for hot water to reach your fixture is determined by the When I was using the hot water, the water got cold.
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In-line Filter Gas Supply Cold Water Line Hot Water Line Flushing the Heat Exchanger (Error Code: LC or 00) An “LC” or “00” error code indicates the unit is beginning to lime up and must be flushed. Failure to flush the appliance will cause damage to the heat exchanger. Damage caused by lime build-up is not covered by the unit’s warranty. After flushing, reset the LC fault code by turning off the power to the unit and turning the power back on. 1. Disconnect electrical power
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Installation Instructions Only properly trained and qualified installers should R50LSi...................REU-VA2019FFUD install this appliance. The warranty may be voided R75LSi...................REU-VA2528FFUD(A) due to improper installation or installation by a non- qualified installer. R94LSi...................REU-VA2535FFUD Rinnai highly recommends all installers attend a R98LSi...................REU-VA3237FFU product knowledge class. R98LSi-ASME .......REU-VA3237FFU-ASME Fo
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Clearances from Appliance to top to Non- to Combustibles Combustibles R50LSi R50LSi R75LSi R98LSi R75LSi R98LSi R94LSi R94LSi Top of 6 inches 12 inches 2 inches 2 inches Heater (152 mm) (305 mm) (51 mm) (51 mm) to side Back of 0 (zero) 0 (zero) 0 (zero) 0 (zero) Heater Front of 6 inches 24 inches 6 inches 24 inches Heater (152 mm) (610 mm) (152 mm) (610 mm) Sides of 2 inches 2 inches 1/2 inch 1/2 inch Heater (51 mm) (51 mm) (13 mm) (13 mm) Floor/ 12 inch
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Electrical Connection The water heater requires a standard 3 prong 120 VAC, 60 Hz properly grounded wall outlet. Plug the 6ft long power cord into the wall outlet. Gas Piping General Instructions including soap and water, may cause corrosion or • A manual gas control valve must be placed in the gas supply line to the Rinnai water heater. A union stress cracking, the piping shall be rinsed with water after testing, unless it has been determined
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Gas Piping Pipe Sizing Procedure - Example The gas supply must be capable of handling the entire gas load 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. Refer to the National Fuel Gas Code, NFPA 54, for proper gas line sizing. The below information is provided as an example. 1. Determine the cubic feet per hour of gas required by dividing the gas input (on the rating plate) by
