RBI Futera XLF Installation And Operation Instructions Manual

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Finned copper tube gas boilers & water heaters – Boiler Manual6Intake air option – Horizontal guidelinesThe maximum equivalent length for the horizontal intake air pipe is100 ft, 30.5 m. Each 90o elbow and the intake air terminal are equalto 10 linear ft, 3.0 m of pipe. If horizontal runs exceed 5 ft, 1.5 mthey must be supported at 3 ft, 0.9 m intervals with overhead hangers.The certified intake air terminal from RBI must be used, see Figure 1,Figure 2 and Figure 4.GENERAL VENTING GUIDELINESThe vent installation must be in accordance with Part7, Venting of Equipment, of the National Fuel GasCode, ANSI Z223.1/NFPA 54–latest revision orapplicable provisions of the local building codes.Canadian installations must comply with CAN/CGAB149.1 or .2 Installation Code. Improper venting canresult in 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/water heater. Appropriate thimbles and fire-stops must be used where required.Common vent systems must be properly engineeredand sized to provide a negative draft of 0.02 in,0.5 mm to 0.1 in, 2.5 mm WC at the flue outlet.Common positive pressure vent systems are not to beused. Improper installation can result in excessive levelsof carbon monoxide which can cause severe personalinjury or death!Common-vent systems — It is required that theboiler nearest the vertical chimney be fired firstwhen the horizontal distance exceeds 50% of thevertical distance. Refer to the HeatNet manual onhow to select the lead boiler. Consult the factory ifany questions. Improper installation can result inexcessive levels of carbon monoxide which can causesevere personal injury or death!EXISTING COMMON VENT SYSTEMSIf an existing boiler/water heater is removed from an existingcommon venting system, the common venting system may thenbe too large for the proper venting of the remaining appliancesconnected to it. At the time of removal of an existing boiler/waterheater, the following steps shall be followed with each applianceremaining connected to the common venting system placed inoperation, while the other appliances remaining connected to thecommon venting system are not in operation.1. Seal any unused openings in the common venting system.2. Visually inspect the venting system for proper size and horizontal pitchand determine there is no blockage or restriction, leakage, corrosionand other deficiencies which could cause an unsafe condition.3. Insofar as is practical, close all building doors and windows andall doors between the space in which the appliances remainingconnected to the common venting system are located and otherspaces of the building. Turn on clothes dryers and any appliancenot connected to the common venting system. Turn on anyexhaust fans, such as range hoods and bathroom exhaust, so theywill operate at maximum speed. Do not operate a summerexhaust fan for a boiler installation. Close fireplace dampers.4. Place in operation the appliance being inspected. Follow thelighting instructions. Adjust thermostat so appliance will operatecontinuously.5. Test for spillage at the draft hood relief opening after 5 minutesof main burner operation. Use the flame of a match or candle, orsmoke from a cigarette, cigar or pipe.6. After it has been determined that each appliance remainingconnected to the common venting system properly vents whentested as outlined above, return doors, windows, exhaust fans,fireplace dampers and any other gas-burning appliance to theirprevious condition of use.7. Any improper operation of the common venting system should becorrected so the installation conforms with the National Fuel Gas Code,ANSI Z223.1/NFPA 54. When resizing any portion of the commonventing system, the common venting system should be resized toapproach the minimum size as determined using the appropriateTables in Appendix F in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 and or CAN/CGA B149 Installation Codes.VENT SYSTEM OPTIONS (CATEGORY I, II, IV)Correctly identify the type of vent system the appliancerequires before proceeding. Category identification isnoted on the unit rating plate.The flue products in a Category II and IV vent system may be cooledbelow their dew point and form condensate in the flue. The materialsused for a Category II and IV vent must be resistant to any corrosivedamage from flue gas condensate. The flue from a Category II and IVvent system must have a condensate drain with provisions to properlycollect and dispose of any condensate that may occur in the venting system.The maximum equivalent length for the flue outlet ventsystem for Category IV conditions is 100 ft, 30.5 m. UseTable 4 for the equivalent lengths per fitting. Table 4 -“Category IV Equivalent Length per Fitting” chart is meantas a guideline for preliminary sizing. If vent lengthapproaches 75% of maximum length listed, an engineeredvent system calculation must be performed, consult factory.The Futera XLF may be vented the following ways:1. OPTION 1 — Direct Vent, Positive PressureCategory IV (individual venting only)Combustion air is piped from the outdoors to the blower inlet.Vent system is certified to UL 1738 for installations in the UnitedStates, ULC S636 for installations in Canada.2. OPTION 2 — Vertical Vent, Positive PressureCategory IV and Negative Pressure Category I & II(individual venting only)Combustion air is obtained from the space in which the unitis installed. Category II & IV vent systems must be certified toUL 1738 for installations in the United States, ULC S636 forinstallations in Canada. Category I vent systems use an approvedmetal chimney or masonry chimney.