50 | CV40E-11 City Seriesinstallation919-696 08.10.161. Stretch out both inner 4" (102 mm) and outer 6 7/8" (175 mm) pipe up toa maximum of 20 feet.Note :The inner and outer pipes may be cut if only a short length is required.2. Install spring spacers around 4" (102 mm) inner pipe as shown.Slide outer flex pipe over and all the way down the 4" pipe.3. Apply a bead of Mill Pac around the perimeter of the 4" (102 mm)inner collar of the flex adapter and slip the 4" (102 mm) inner flex pipefrom the Vertical termination kit over the flex adapter ensuring that theinner flex pipe overlaps the collar by at least 1-3/8" (35 mm). Fasten with3 screws.4. Apply a bead of Mill Pac around the perimeter of the 6-7/8" (175 mm)outer collar of the flue adapter and slip it over the 6-7/8" (175 mm) outerflex pipe from the vertical termination kit ensuring that the outer flex pipeoverlaps the collar by at least 1-3/8" (35 mm). Fasten with the 3 screws.5. Repeat steps to secure the other end of the flex adapter using the flex kit.6. See Vertical Vent installation instructions for installation of the completevent system.Note: If an offset is necessary in the attic or floor joists it is important tosup-port the vent pipe every 3 feet (0.91 m) to avoid excessive stress andsagging of the vent pipe. Wall straps are provided (3 in total) for thispurpose.All round/plumbers strapping may also be used if further supports arerequired.VERTICAL FLUE EXTENSION KIT (PART # 946-756)20 foot (6.1 m) Flex pipe Extension(Used in conjunction with the 946-755 Vertical Flex kit and 948-367/P flexto flex adaptor).3 wall strapsflex adaptor4" (102 mm) innerpipe 20ft. (6.1 m)6-7/8" (175 mm)outer flex pipe20 ft (6.1 m)10 spring spacers1919-698919-69806.12.1806.12.1860-1/4Ceiling firestop60-1/4Ceiling firestopDiagram 1Diagram 1Diagram 1aDiagram 1aEnclosureCeiling firestopFlashingTermination CapStorm CollarRoof supportCeiling firestopEnclosureCeiling firestopFlashingTermination CapStorm CollarRoof supportCeiling firestopFirestop spacer to preventdebris from falling into the ceilingfirestopA ceiling firestop/firestop spacer must be installed when passing througheach floor or ceiling level. To install the ceiling firestop/firestop spacer ina flat ceiling or floor joist cut a 10- ¼ inch square hole. Frame the hole asshow in Diagram 1 and install the ceiling firestop. Slide the top attic insula-tion spacer onto the top of the attic insulation shield/firestop - See Diagram1a. Secure with 4 screws/nails. If more than one is required, these can bepurchased separately.Note: The ceiling firestop/firestop spacer may be cut down to size if this shieldis too high for the application.CEILING FIRESTOP/FIRESTOP SPACER( PART # 946-757)Used in conjunction with the 946-755 Vertical flex kit and 946-756 kit Verticalflex extension kit/Horizontal power vent kit.CEILING FIRESTOP/FIRESTOP SPACER( PART # 946-757)Used in conjunction with the 946-755 Vertical flex kit and 946-756 kit Verticalflex extension kit/Horizontal power vent kit.Firestop spacer to preventdebris from falling into the ceilingfirestopA ceiling firestop/firestop spacer must be installed when passing througheach floor or ceiling level. To install the ceiling firestop/firestop spacer ina flat ceiling or floor joist cut a 10- ¼ inch square hole. Frame the hole asshow in Diagram 1 and install the ceiling firestop. Slide the top attic insula-tion spacer onto the top of the attic insulation shield/firestop - See Diagram1a. Secure with 4 screws/nails. If more than one is required, these can bepurchased separately.Note: The ceiling firestop/firestop spacer may be cut down to size if this shieldis too high for the application.1Vertical Flue Extension Kit (Part #946-756)Ceiling Firestop / Firestop Spacer (Part #946-757)