Direct Vent Tankless Water Heater - Alpine Home Air Products

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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 theappliance will cause damage to the heat exchanger. Damage caused by lime build-up is not covered by the unit’swarranty. After flushing, reset the LC fault code by turning off the power to the unit and turning the power backon.1. Disconnect electrical power to the water heater.2. Close the shutoff valves on both the hot water andcold water lines (V3 and V4).3. Connect pump outlet hose (H1) to the cold waterline at service valve (V2).4. Connect drain hose (H3) to service valve (V1).5. Pour 4 gallons of undiluted virgin, food grade,white vinegar into pail.6. Place the drain hose (H3) and the hose (H2) tothe pump inlet into the cleaning solution.7. Open both service valves (V1 and V2) on the hotwater and cold water lines.8. Operate the pump and allow the cleaning solutionto circulate through the water heater for 1 hour ata rate of 4 gallons per minute (15.1 liters perminute).9. Turn off the pump.10. Rinse the cleaning solution from the water heateras follows:a. Remove the free end of the drain hose (H3)from the pail.b. Close service valve, (V2), and open shutoffvalve, (V4). Do not open shutoff valve, (V3).c. Allow water to flow through the water heater for5 minutesd. Close service valve, (V1), and open shutoffvalve, (V3).11. Disconnect all hoses.12. With (V4) closed, remove the in-line filter at thecold water inlet and clean out any residue. Placefilter back into unit and open (V4).13. Restore electrical power to the water heater.3/4" Ball Valve3/4" UnionCheck ValvePressure Relief ValveV1KEYSWater HeaterV2In-lineFilterPressure RegulatorCirculating PumpBoiler Drain ValveSolenoid ValveGas SupplyCLEAN THERMISTORSRemove and clean thermistorswith a soft cloth or sponge afterremoving O-rings.H3Hot Water LineV3V4Cold Water LineCleaning solution is 4 gallons ofundiluted virgin, food grade,white vinegar.H2Circulating PumpH116 VB Series Indoor LS Manual
Only properly trained and qualified installersshould install this appliance. The warranty maybe voided due to improper installation orinstallation by a non-qualified installer.Rinnai highly recommends all installers attend aproduct knowledge class.For information on a Rinnai Training Course orfor questions on installation call 1-800-621-9419.General InstructionsInstallation InstructionsR75LSi ................ REU-VB2528FFUD-USR94LSi ................ REU-VB2735FFUD-USR98LSi ................ REU-VA3237FFU-USR98LSi-ASME .... REU-VA3237FFU-ASMEThe VB series (R75LSi, and R94LSi) are certified forinstallation in manufactured (mobile) homes.WARNINGDo not use substitute materials.Use only parts certified with the appliance.• This appliance must be installed by a state qualifiedor licensed contractor. It is the responsibility of theperson having the water heater installed to ensurethe installing contractor has proper licenses andpermits for installing water heaters in your location.Rinnai highly recommends that installers attend aproduct knowledge class to ensure customersatisfaction and warranty coverage. Failure tocomply with state and local codes pertaining towater heater installations may void the warranty.• This appliance is not to be installed outdoors.• A qualified installer or service technician shouldinstall the appliance, inspect it, and leak test itbefore use.• The installation must conform with local codes or, inthe absence of local codes, with the National FuelGas Code, ANSI Z223.1/NFPA 54, or the NaturalGas and Propane Installation Code, CSA B149.1. Ifinstalled in a manufactured home, the installationmust conform with the Manufactured HomeConstruction and Safety Standard, Title 24 CFR,Part 3280 and/or CAN/SCA Z240 MH Series, MobileHomes.• The appliance, when installed, must be electricallygrounded in accordance with local codes or, in theabsence of local codes, with the National ElectricalCode, ANSI/NFPA 70, or the Canadian ElectricalCode, CSA C22.1.• The appliance and its appliance main gas valvemust be disconnected from the gas supply pipingsystem during any pressure testing of that system attest pressures in excess of 1/2 psi (3.5 kPa) (13.84in W.C.).• The appliance must be isolated from the gas supplypiping system by closing its individual manualshutoff valve during any pressure testing of the gassupply piping system at test pressures equal to orless than 1/2 psi (3.5 kPa) (13.84 in W.C.).• Follow the installation instructions and those in Careand Maintenance for adequate combustion andventilation air.• The appliance should be located in an area wherewater leakage of the unit or connections will notresult in damage to the area adjacent to theappliance or to lower floors of the structure. Whensuch locations cannot be avoided, it isrecommended that a suitable drain pan, adequatelydrained, be installed under the appliance. The panmust not restrict combustion air flow.• The flow of combustion and ventilation air shall notbe obstructed. Combustion air shall not be suppliedfrom occupied spaces.• This appliance is not suitable for use in anapplication such as a pool or spa heater that useschemically treated water . (This appliance issuitable for filling large or whirlpool bath tubs withpotable water.)• If a water heater is installed in a closed water supplysystem, such as one having a backflow preventer inthe cold water supply line, means shall be providedto control thermal expansion. Contact the watersupplier or local plumbing inspector on how tocontrol thermal expansion.• Should overheating occur or the gas supply fail toshut off, turn off the manual gas control valve to theappliance.• Keep the air intake location free of chemicals suchas chlorine or bleach that produce fumes. Thesefumes can damage components and reduce the lifeof your appliance.• For gas type conversion, contact Rinnai.VB Series Indoor LS Manual 17
Page 1 and 2: Direct Vent Tankless Water HeaterOp
Page 3 and 4: SpecificationsModel R75LSi R94LSi R
Page 5 and 6: Operating InstructionsThe MC-91 tem
Page 7 and 8: Temperature Controllers - ModelsDim
Page 9 and 10: Temperature Controller Settings* Re
Page 11 and 12: Using the Water Smart / Bath Fill F
Page 13 and 14: Error CodesThe Rinnai water heater
Page 15: Trouble Shooting for Common IssuesI
Page 19 and 20: Electrical ConnectionThe water heat
Page 21 and 22: Water PipingGeneral Instructions•
Page 23 and 24: Freeze Protection PipingNOTICEWarra
Page 25 and 26: Recommended Piping for Circulation
Page 27 and 28: Venting InstructionsIntake / Exhaus
Page 29 and 30: Vent ProductsListed and Tested Vent
Page 31 and 32: Additional Clearances - Vent Termin
Page 33 and 34: Flue Installation (R98LSi, R98LSi-A
Page 35 and 36: Connecting Multiple Water HeatersTh
Page 37 and 38: Temperature Controller Installation
Page 39 and 40: Operating InstructionsFOR YOUR SAFE
Page 41 and 42: Space HeatingIf the water heater is
Page 43 and 44: Ladder Diagram (for R75LSi and R94L
Page 45 and 46: Warranty InformationConsumer Suppor
Page 47 and 48: State RegulationsNOTICE BEFORE INST
Page 49 and 50: Comportements et pratiques de sécu
Page 51 and 52: EntretienAVERTISSEMENTCoupez l'alim
Page 53 and 54: Écartements par rapport à l'appar
Page 55 and 56: Tuyauterie d'eauInstructions géné
Page 57 and 58: Instructions de ventilationConsigne
Page 59 and 60: Produits de ventilationProduits de
Page 61 and 62: Installation de conduit de cheminé
Page 63 and 64: Installation de conduit de cheminé
Page 65 and 66: Diagramme en escalier (R75LSi, R94L
Page 67 and 68:
Informations sur la garantieSupport
Page 69 and 70:
NotesVB Series Indoor LS Manual 69
Page 71 and 72:
NotesVB Series Indoor LS Manual 71
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Direct Vent Tankless Water Heater - Alpine Home Air Products

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