General Venting │ FTV I&O Manual104.0 GENERAL VENTINGThe FTV is certified as a “Category IV” boiler requiring a “Special Venting System” designed for pressurizedventing. The Exhaust Vent must be piped to the outdoors, using the vent materials and rules outlined in thissection. Under no conditions may this unit vent gases into a masonry chimney, unless it is vacant, and utilizes theapproved venting material and rules described in this section.Vent and Air-inlet are to be piped separately. The FTV cannot share a common vent orair-inlet with multiple boilers. Failure to comply will result in serious injury or death.Removing an Existing Boiler from Common Venting SystemDo not install the FTV into a common venting system with any other boiler. Failure tocomply with this warning will cause flue gas spillage and leech carbon monoxideemissions into the surrounding air resulting in serious injury or death.When an existing boiler is removed from a common venting system, the common ventingsystem is likely to be too large for proper venting of the remaining boilers connected toit. Instructions have been provided on how to remove the existing boiler and how toresize the remaining venting system. Failure to follow these instructions may result inproperty damage, serious injury or death.Upon removal of an existing boiler, the following steps shall be followed for each boiler remaining in thecommon venting system; prior to commencing this procedure, shutdown all boilers remaining in the commonventing system.Steps to Removing an Existing Boiler:1. Seal any unused openings in the common venting system.2. Visually inspect the venting system for proper size and horizontal pitch. Verify that there is no blockage,restriction, leakage, corrosion or other deficiencies which could cause an unsafe condition.3. Insofar as is practical, close fireplace dampers, all building doors and windows and all doors between thespace in which the boilers remaining connected to the common venting system are located and other spacesof the building. Turn on clothes dryers and any boiler not connected to the common venting system. Turn onany exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Donot operate a summer exhaust fan.4. Place in operation the boiler being inspected. Follow the applicable lighting instructions. Adjust thermostatso boiler will operate continuously.5. Test for spillage at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of amatch or candle, or smoke from a cigarette, cigar or pipe.6. After it has been determined that each boiler remaining connected to the common venting system properlyvents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers and any othergas burning boiler to their previous condition of use.7. Any improper operation of the common venting system should be corrected so the installation conforms tothe National Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CAN/CSA B149.1, Natural Gas and PropaneInstallation Code. When resizing any portion of the common venting system, the common venting systemshould be resized to approach the minimum size as determined using the appropriate tables in Part 11 of theNational Fuel Gas Code, ANSI Z223.1/NFPA 54 and/or CAN/CSA B149.1, Natural Gas and PropaneInstallation Code.