Rinnai R50LSI Operation And Installation Manual
Direct vent tankless water heater
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ANS Z21.10.3
●
CSA 4.3
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
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.
•
Follow the gas supplier's instructions.
If you cannot reach your gas supplier, call the fire
•
department.
- Installation and service must be performed by a qualified
installer, service agency or the gas supplier.
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
Operating Instructions..............5
Maintenance ............................12
Error Codes .............................13
Installation Instructions ............17
Consumer Support...................42
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Table of Contents
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Summary of Contents for Rinnai R50LSI
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Page 1: Table Of Contents
— Installation and service must be performed by a qualified ● CSA 4.3 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... -
Page 2: Table Of Contents
Optional Piping for Circulation Systems...25 Venting Instructions Flue Terminal Clearances (ANS Z21.10.3 ● CSA 4.3 Additional Clearances ...30 Flue Installation - Concentric Venting (R50LSi, R75LSi, R85LSi)...31 Flue Installation (R98LSi, R98LSi-ASME) ...32, 33 High Altitude Installation...34 Connecting Multiple Water Heaters...34 Temperature Controller Installation Operating Instructions ...37... -
Page 3: Specifications
* Minimum flow may vary slightly depending on the temperature setting and the inlet water temperature. ** for commercial and hydronic applications requiring higher temperatures Rinnai is continually updating and improving products. Therefore, specifications are subject to change without prior notice. -
Page 4: Consumer Safety Information
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. DANGER Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. -
Page 5: Operating Instructions
The Rinnai water heater is one of the most advanced water heaters available. It provides a continuous supply of hot water at a preset temperature. This appliance is direct vent where air is brought in from the outside and combustion gases are exhausted to the outside. -
Page 6: Temperature Controllers - Models
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. - Page 7 Temperature Controllers - Models 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 In Use Indicator Priority Button and Indicator Call Clock Thermostat Dimensions (inches): 5.0 W x 4.75 H x 0.75 D In Use Indicator Temperature...
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Page 8: Setting The Temperature
The green Priority light will glow indicating that this controller is controlling the temperature and that the Rinnai water heater is ready to supply hot water. The priority can only be changed while no hot water is running. -
Page 9: Temperature Ranges
Water temperatures over 125º F (51º C) can cause severe burns or scalding. Refer to the Danger Alert on water temperatures. Rinnai shall not, in any event, be liable for damages resulting from such misuse or misapplication. -
Page 10: Using The Water Smart Bath Fill Function
The green Priority light will glow indicating that this controller is controlling the temperature and that the Rinnai water heater is ready to supply hot water. 2. Press the “Temp” ▲ or ▼ buttons to obtain the desired temperature setting. -
Page 11: Filling The Tub
Bath Fill button.” 4. Turn off the bath hot water tap and push the Bath Fill button. The water heater will not allow hot water to flow from any source until the “Water Smart / Bath Fill” button is pushed. -
Page 12: Maintenance
Maintenance WARNING Turn off the electrical power supply, the manual gas valve and the manual water control valve whenever servicing the unit. Repairs and maintenance should be performed by a qualified service technician. The appliance should be inspected annually by a qualified service technician. Verify proper operation after servicing. -
Page 13: 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. - Page 14 Code Fault Thermal Fuse Over Temperature Warning Outgoing Water Temperature Sensor Fault Heat Exchanger Outgoing Temperature Sensor Fault Combustion Air Temperature Sensor Fault Modulating Solenoid Valve Signal Abnormal Combustion Fan Failure Water Flow Control Fault SV0, SV1, SV2, and SV3 Solenoid Valve Circuit Fault Flame Sensing Device Fault...
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Page 15: Trouble Shooting For Common Issues
Off” button press the ▲ button. The last 9 error codes will flash one after the other. To exit this mode press the “On/Off” and ▲ button as before. To display the water flow through the water heater press and hold the ▲ button for 2 seconds and without releasing the ▲ button press the “On/Off” button. -
Page 16: Flushing The Heat Exchanger
Close service valve, (V2), and open shutoff valve, (V4). Do not open shutoff valve, (V3). c. Allow water to flow through the water heater for 5 minutes d. Close service valve, (V1), and open shutoff valve, (V3). 11. Disconnect all hoses. -
Page 17: Installation Instructions
Rinnai highly recommends all installers attend a product knowledge class. For information on a Rinnai Training Course or for questions on installation call 1-800-621-9419. General Instructions WARNING Do not use substitute materials. -
Page 18: Clearances From Appliance
Every vent connection must be accessible for inspection, cleaning, and replacement. The clearance for servicing is 24 inches in front of the water heater. For closet installation: R50LSi, R75LSi, R94LSi: clearance is 6 inches (152 mm) from the front. R98LSi: clearance is 24 inches (610 mm) from the front. -
Page 19: Electrical Connection
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 • A manual gas control valve must be placed in the gas supply line to the Rinnai water heater. -
Page 20: Pipe Sizing Procedure - Example
Pressure Drop: 0.3 inches W.C. Specific Gravity: 0.60 Pipe Size (inches) Length Gas Input of Rinnai water heater (BTU / HR) Heating Value of Gas (BTU / FT Pipe Sizing Table - Propane Gas cubic feet per hour Inlet Pressure: Pressure Drop: 0.5 inches W.C. -
Page 21: Water Piping General Instructions
• Ensure that the water filter on the Rinnai water heater is clean and installed. • The relief valve should be added to the hot water outlet line according to the manufacturer’s... -
Page 22: Freeze Protection Piping
Freeze Protection Piping NOTICE Warranty does not cover damage due to freezing. With electrical power and gas supplied to a Rinnai water heater, it will not freeze in environments as cold as -30º F when protected from direct wind exposure. -
Page 23: Recommended Piping For Basic Installation
3/4" Ball Valve 3/4" Union Check Valve Pressure Relief Valve Rinnai Water Heater This is not an engineered drawing. It is intended only as a guide and not as a replacement for professionally engineered project drawings. This drawing is not intended to describe a complete system. It is up to the... -
Page 24: Recommended Piping For Circulation Systems
Pump to be of bronze or stainless construction. IMPORTANT: Connect the building return line to the hot water supply line as close as possible to the Rinnai Water Heater. 3/4" Ball Valve 3/4" Union Check Valve Pressure Relief Valve... -
Page 25: Optional Piping For Circulation Systems
The pump should be sized to overcome the pressure loss through the Rinnai water heater, supply and return plumbing. Refer - ence the Rinnai Hot Water System Design Manual, Pump Sizing for Circulation. Pump to be of bronze or stainless construc - tion. -
Page 26: Venting Instructions Intake / Exhaust Guidelines
Without proper drainage or disposal, condensate will damage the heat exchanger. • Rinnai LSi tankless water heaters have an integrated condensate collector. • Rinnai offers a condensate trap. • Regions of cold climate will create more condensate in the vent system. -
Page 27: Maximum Vent Length
1. Determine the number of 90 degree elbows in the vent system. (Two 45 degree elbows count as one 90 degree elbow. On the R98 models each one foot of semi rigid flex duct used in the air intake length is equivalent to one 90 degree elbow.) 2. -
Page 28: Vent Products
Systems Metal-Fab Corr/Guard * When ordering from Rinnai, ask for these part numbers or kits: FSAAU4 - ask for FSAAU4SP (single pack) FSRC4 - ask for FSVPK4 Variable Pitch Roof Flashing Kit (includes rain cap FSRC4, storm collar, roof jack,... -
Page 29: Flue Terminal Clearances (Ans Z21.10.3 ● Csa 4.3 )
Flue Terminal Clearances ( Description Clearance above grade, veranda, porch, deck, or balcony Clearance to window or door that may be opened Clearance to permanently closed window Vertical clearance to ventilated soffit, located above the terminal within a horizontal distance of 2 feet (61 cm) from the center line of the terminal Clearance to unventilated soffit Clearance to outside corner... -
Page 30: Additional Clearances
For VA3237 air intake position, follow the ANS Z21.10.3 ● CSA 4.3 requirements on the previous page. Vent terminal (represents concentric vent terminal or VA3237 exhaust only vent terminal) 12" (0.30 m ) to an inside corner (0.30 m) between Rinnai terminals at same level INSIDE CORNER (1.52 m) between 60"... -
Page 31: Flue Installation - Concentric Venting (R50Lsi, R75Lsi, R85Lsi)
Flue Installation - Concentric Venting (R50LSi, R75LSi, R85LSi) Horizontal Termination without using the Condensate Collector WARNING If the condensate collector is not used, the drain pipe must be capped to prevent exhaust gases and condensate from entering the building. The cap is supplied on the appliance. -
Page 32: Flue Installation (R98Lsi, R98Lsi-Asme)
Flue Installation (R98LSi, R98LSi-ASME) Air Intake Assembly The air intake system consists of a field supplied 4 inch diameter stainless steel, Schedule 40 PVC, ABS or CPVC pipe. A maximum 6 feet of semi-rigid flexible aluminum ducting can also be used. Foil wrapped dryer vent and cell core products are not authorized. -
Page 33: Vertical Terminations
Flue Installation (R98LSi, R98LSi-ASME) Horizontal with Concentric Termination SLOPE INTAKE AND EXHAUST TOWARD OUTSIDE TERMINATION MINIMUM 1/4" PER FOOT Vertical Terminations The air intake requires a return bend or two 90º elbows to prevent entry of rain. The vent termination and air intake must be in the same pressure zone. VA Series Indoor LS Manual... -
Page 34: High Altitude Installation
High Altitude Installations Set dip switches 2 and 3 to the values shown in table below for your altitude. The default setting for the appliance is 0-2000 ft (0-610 m) with switches No. 2 and No. 3 in the OFF position. 0-2000 ft (0-610 m) Switch No. -
Page 35: Temperature Controller Installation
Configurations A maximum of 4 temperature controllers, including wired and wireless, can be installed for a water heater or bank of water heaters. Controllers can only be wired in parallel. Controllers cannot be wired in series. -
Page 36: Mounting The Controller
2. 7. Disconnect the power from the Rinnai water heater. 8. Remove the cover of the Rinnai water heater. 9. Remove the plastic cover from the PCB and electrical connections. 10. Thread the cable through the access hole at... -
Page 37: Operating Instructions
Operating Instructions FOR YOUR SAFETY READ BEFORE OPERATING WARNING 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. -
Page 38: Technical Data
Pressure Drop Curve Outlet Flow Data R98LSi 10.0 R94LSi R75LSi R50LSi Technical Data R75LSi R50LSi Water Flow (gpm) delta T - Temperature Rise (ºF) VA Series Indoor LS Manual R94LSi R98LSi... -
Page 39: Space Heating
Iron Components Do not use Rinnai water heaters directly for space heating applications involving iron radiators or applications with any iron components. Iron components may oxidize creating rust that will clog the inlet filter of the Rinnai water heater. VA Series Indoor LS Manual... -
Page 40: Dimensions
Dimensions R50LSi, R75LSi, R94LSi DESCRIPTION Width Depth * Height - Unit Height - with brackets Hot Water Outlet - from wall * Hot Water Outlet - from center Cold Water Inlet - from wall * Cold Water Inlet - from center... -
Page 41: Ladder Diagram
Ladder Diagram 3A(FUSE) ARRESTER VARISTOR WATERFLOW SENSOR WATERFLOW CONTROL DEVICE BY-PASSFLOW CONTROL DEVICE BY-PASS SERVO MODEL ONLY THERMAL FUSE OVERHEAT SWITCH INDOOR MODEL ONLY FROST SENSING SWITCH VARISTOR RELAY 1 SWITCHING POWER SUPPLY DC12V DC170V DC40V DC12.6V DC5V WATERFLOW SENSOR CIRCUI T WATERFLOW CONTROL DEVICE... -
Page 42: Consumer Support
(except when an MCC-91 is used with a Rinnai Hydronic Air Handler). The integrated controller on indoor models has a 1 year warranty on parts. † Note: Period of coverage is reduced to 3 years from date of purchase if the Rinnai water heater temperature setting exceeds 160º F (71º C). - Page 43 Replacement of the product may be authorized by Rinnai only. Rinnai does not authorize any person or company to assume for it any obligation or liability in connection with the replacement of the product. If Rinnai determines that repair of a product is not possible, Rinnai will replace the product with a comparable product at Rinnai’s discretion.
- Page 44 • Up to 83% AFUE Energy Efficiency • Zero-Clearance Installation • Available in Four Options of Fronts • Remotes and Fan Included • Gas Conversion Kit Available Hydronic Air Handler Designed for Use with Rinnai Systems • Domestic Hot Water Priority • Optional Programmable Thermostat •...