Classic FF - Propane Installation 15INSTALLATION14 CUTTING THE FLUE - wall thicknesses of 114 to 600mmNote. If the stand-off brackets are used it is essential that30mm is added to the measured wall thickness when markingthe flue, (to allow for the thickness of the brackets).1. Measure and note the wall thickness 'X'.2. Mark the wall thickness onto the flue .3. To ensure the tube is cut square, mark the flue all the wayround.4. Cut to length 'X', using the cardboard ring for support.5. Remove cardboard ring and remove any burrs.1. Fit the boiler sealing ring inside the outer flue duct. Ensureboiler sealing ring is fully engaged.Ensure the notch aligns with the groove on the outer flueduct. This ensures correct alignment of the flue terminal.15 FITTING BOILER SEALING RING TO THE FLUE2. Drill 3 holes 3.2mm ( 1/8 ") dia. through the outer flue duct andboiler sealing ring. Do NOT drill the inner flue duct.3. Insert the self tapping screws, provided, in order to fix theboiler sealing ring in position.4. Stick the self adhesive foamstrip, provided in thehardware pack, onto theflue immediately behind theboiler sealing ring.1. Insert the flue extension tube into the flue assembly.2. Insert the flue assembly through the hole sufficiently farenough to allow the rubber seal to unfold completelyand form an adequate seal on the outside wall.3. Ensure the notch is at the top. This will aid the locationof the studs into the boiler back panel.1. Fix the mounting plate to the wall with the No.14 x 50mmwood screws.2. If the down ward routing of pipes is required, then thedownward routing pipe brackets and M8 spacer (suppliedin the Downward Piping Kit) should be fitted to the wallmounting plate now.3. Fit the bottom 2 screws to secure the bracket(s) to thewall, through the wall mounting plate.3. Check with a spirit level that the plate is vertical.16 FITTING THE FLUE ASSEMBLY17 WALL MOUNTING PLATEREAR FLUE OUTLET