RBI Futera Fusion XLF Installation And Operation Instructions Manual

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5Finned copper tube gas boilers – Boiler ManualFinned copper tube gas boilers – Boiler ManualFTable 3 Intake Air Pipe Sizing (Up to 100’)ModelMBHVertical Horizontalin mm in mm2500/3000 10 254 8 2033500/4000 12 305 10 254Note: Max horizontal/vertical intake pipe 100’ equivalent.All joints in metal intake air systems must be secured using corro-sion resistant fasteners and sealed using a suitable Silicone caulk.If PVC or CPVC is used, the joints must be cleaned with a suitablesolvent and connected using a solvent based PVC cement. Thecombustion air system MUST be supported by the buildingstructure not the boiler.A combustion air damper interlocked with the unitshould be installed in the intake air pipe when theinfiltration of subfreezing air could occur, otherwisethe unit could freeze up voiding the warranty!Intake Air Option – Vertical GuidelinesThe maximum equivalent length for the vertical intake air pipe is100 ft, 30.5 m. Each 90° elbow and the intake air terminal areequal to 10 linear ft, 3.0 m of pipe, see Table 3.An approved, nonrestrictive intake air terminal must be used. Theintake air terminal must terminate as shown in Figure 3. Thepenetration point in the roof must be properly flashed and sealed.Intake Air Option – Horizontal GuidelinesTh e maximum equivalent length for the horizontal intake air pipeis 100 ft, 30.5 m. Each 90° elbow and the intake air terminalare equal to 10 linear ft, 3.0 m of pipe. If horizontal runs exceed5 ft, 1.5 m they must be supported at 3 ft, 0.9 m intervals withoverhead hangers. The certifi ed intake air terminal from RBI mustbe used, see Figures 1, 2 and 4.GENERAL VENTING GUIDELINESTh e vent installation must be in accordance with Part7, Venting of Equipment, of the National Fuel GasCode, ANSI Z223.1/NFPA 54-latest revision or appli-cable provisions of the local building codes. Canadianinstallations must comply with CAN/CGA B149.1or .2 Installation Code. Improper venting can resultin excessive levels of carbon monoxide which canresult in severe personal injury or death!All vent systems must be fully supported by the building structureand not by the boiler. Appropriate thimbles and fi re-stops must beused where required.Common vent systems must be properly engineeredand sized, please contact the factory.A UL listed stainless steel vent system must be usedunless this unit is fitted with an RBI supplied non-metallic vent kit. Failure to comply with this warningcan cause excessive levels of carbon monoxide resultingin severe illness and death!For instructions utilizing the non-metallic vent option,see Addendum (FTF-PVCVO) for PVC and (FTF-PPVO) for Polypropylene.Vent System OptionsThe flue products in the vent system may be cooled below theirdew point and form condensate in the fl ue. The materials used fora Category IV vent must be resistant to any corrosive damagefrom flue gas condensate. The flue from a Category IV vent systemmust have a condensate drain with provisions to properly collectand dispose of any condensate that may occur in the venting system.The Futera Fusion may be vented the following ways:1) Direct Vent, Positive Pressure, Category IV uses a ventsystem certified to UL 1738 for installations in the UnitedStates, ULC S636 for installations in Canada. Combustion airis piped from the outdoors to the blower inlet.2) Side Wall Vent, Positive Pressure, Category IV usesa vent system certified to UL 1738 for installations in theUnited States, ULC S636 for installations in Canada. Combus-tion air is obtained from the space in which the unit is installed.To ensure proper operation, boilers that are ventedside wall and use room air must not be fi red less than33% input.3) Vertical Vent, Positive Pressure, Category IV uses avent system certifi ed to UL 1738 for installations in the UnitedStates, ULC S636 for installations in Canada. Combustion airis obtained from the outdoors or the space in which the unitis installed.4) Vertical Vent, Negative Pressure, Category II (commonventing) requires negative pressure in vent (natural draft).Requires a metal chimney system approved for Category IIventing. This method is required if common venting multipleFusion boilers.All venting and combustion air material supplied byinstaller. All venting materials must be approved forthe application. Consult the vent manufacturer’sproduct literature.The maximum equivalent length for the flue outletvent system for Category IV conditions is 100 ft,30.5 m. Use Table 4 for the equivalent lengths perfi tt ing. Table 4 - “Category IV Equivalent Length perFitting” chart is meant as a guideline for preliminarysizing. If vent length approaches 75% of maximumlength listed, an engineered vent system calculationmust be performed, consult factory.