Direct Vent Tankless Water Heater - Alpine Home Air Products

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Optional Piping for Circulation SystemsNOTE:For residential and commercialapplications, this piping arrangementreduces the warranty to the following:3 years on heat exchangerFor this application:3 year on partsFull warranty will be maintained if anon-demand recirculation system isincorporated. Refer to the LimitedWarranty.Pump should be controlled by an Aquastat,Timer or Combination Aquastat and Timer.Pump to be sized to maintain circulationloop temperature.RinnaiWater HeaterRinnaiEquipment ListRinnaiWater HeatersRIK-KIT (Optional)(3/4" Fittings Include:2 Unions, 2 Ball Valves,2Drain Valvesand1 Pressure Relief Valve.)QTY11A minimum of 3 GPM flow is recommendedfor the circulation system.The pump should be sized to overcome thepressure loss through the Rinnai waterheater, supply and return plumbing. Refer -ence the Rinnai Hot Water System DesignManual, Pump Sizing for Circulation.Pump to be of bronze or stainless construc -tion.3/4" Gas ConnectionGas SupplyNote:Water heater outlet temperaturecannot be adjusted whencirculationpumpisrunning.Minimum 3/4" Hot WaterSupply LineMinimum 3/4“ Cold Water Supply Line(Optional)2-6 GallonStorage Tank(To eliminate cold watersandwich effect caused byfrequent On/Off operation)Expansion TankBuilding Fixture Outlets3/4" Ball Valve3/4" UnionCheck ValvePressure Relief ValveKEYSPressure RegulatorCirculating PumpBoiler Drain ValveSolenoid ValveThis is not an engineered drawing. It is intended only as a guide and notas a replacement for professionally engineered project drawings. Thisdrawing is not intended to describe a complete system. It is up to thecontractor/engineer to determine the necessary components andconfiguration of the particular system being installed. This drawing doesnot imply compliance with local building code requirements. It is theresponsibility of the contractor/engineer to ensure installation is inaccordance with all local building codes. Confer with local buildingofficials before installation.26 VB Series Indoor LS Manual
Venting InstructionsIntake / Exhaust GuidelinesRefer to the specific instructions on your vent product for additionalinstallation requirements.• This water heater is a direct vent water heater andtherefore is certified and listed with the ventsystem. You must use vent components that arecertified and listed with the water heater model.• Do not combine vent components from differentmanufacturers.• The vent system must vent directly to the outsideof the building and use outside air for combustion.• Venting should be as direct as possible with aminimum number of pipe fittings.• Avoid dips or sags in horizontal vent runs byinstalling supports per the vent manufacturer’sinstructions.• Support horizontal vent runs every four feet and allvertical vent runs every six feet or in accordancewith local codes.• Vent diameter must not be reduced.• Do not connect the venting system with an existingvent or chimney.CondensateCondensate formation can occur in high efficiencydirect vent appliances. To prevent condensatedamage follow these instructions.• Vertical terminations must incorporate acondensate drain and trap as close as possible tothe appliance.• R75LSi, and R94LSi water heaters have anintegrated condensate collector.• Rinnai offers a condensate trap.• Regions of cold climate will create morecondensate in the vent system. The condensatecollector should be used in cold climates.• Use only vent that is approved and identified asacceptable for your particular model.• Do not use PVC, CPVC, ABS or galvanizedmaterial to vent this appliance.• Slope the venting toward the appliance according tothe vent manufacturers installation instructions.• All condensate must drain and be disposed of perlocal codes.• Use only PVC or CPVC pipe for the condensatedrain line.• The condensate drain pipe should be as short aspossible and have a downward pitch.• Do not connect the condensate drain pipe directlyto the rain sewer.• Do not common vent with the vent pipe of anyother water heater or appliance.• Vent connections must be firmly pressed togetherso that the gaskets form an air tight seal.• R75LSi, R94LSi: The vent piece connected to thewater heater must be secured with one self-tappingscrew.• Refer to the instructions of the vent systemmanufacturer for component assembly instructions.• If the vent system is to be enclosed, it is suggestedthat the design of the enclosure shall permitinspection of the vent system. The design of suchenclosure shall be deemed acceptable by theinstaller or the local inspector.NOTICEIf it becomes necessary to access an enclosed ventsystem for service or repairs, Rinnai is not responsiblefor any costs or difficulties in accessing the ventsystem. Warranty does not cover obtaining access toan enclosed vent system.WARNINGThe condensate trap must be primed before operationto prevent exhaust gases from entering the building.NOTICEProvisions must be made to prevent the condensatefrom entering the water heater. Without properdrainage or disposal, condensate will damage the heatexchanger.Do not plug or cap the integrated condensate line.Without proper drainage or disposal, condensate willdamage the water heater.• The condensate drain pipe (along its entire length)must be at least the same diameter as the drainline, (3/8 inch NPT).• The end of the condensate drain pipe should beopen to the atmosphere. The end should not beunder water or other substances.• Do not connect the condensate drain line with anair conditioning evaporator coil drain.• To minimize freezing of the condensate, run thecondensate drain line through an interior wall orbetween insulation and an interior wall.• The condensate collector should be used for allhydronic heating applications.VB Series Indoor LS Manual 27
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 and 16: Trouble Shooting for Common IssuesI
Page 17 and 18: Only properly trained and qualified
Page 19 and 20: Electrical ConnectionThe water heat
Page 21 and 22: Water PipingGeneral Instructions•
Page 23 and 24: Freeze Protection PipingNOTICEWarra
Page 25: Recommended Piping for Circulation
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

Direct Vent Tankless Water Heater - Alpine Home Air Products

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