Classic FF - Installation & Servicing 13INSTALLATIONFlue lengthfor rearFlue length for sideJacking screw forboiler alignment1. Unpack the boiler.2. Remove the casing as follows and place to one side toavoid damage.a. Undo the 2 casing retaining screws (a) retaining thecasing to the back panel.b. Swing the bottom of the boiler casing up until thecontrols pod casing has cleared the controls thenunhook the top from the back panel.3. Remove the boiler from its packaging base. The boilermay now be stood upright on its controls supportprotection frame to ease handling and installation.4. Unpack the boiler terminal box and, if applicable, theextension flue box(es).9 PACKAGING AND CASING REMOVALSIDE FLUEINSTALLATIONREAR FLUEINSTALLATIONFLUE KITSPack B: supplied as standard.Pack D*: optional extension kit for side flue or rearflue outlet. Refer to Frame 33.1. A maximum of 2 extension ducts (plus thestandard flue duct) may be used together.2. Flue extensions of greater than 1m (39")should be supported with the bracket provided.If the stand-off brackets have been used it isnecessary, in order to keep the flue aligned, touse the spacer bracket with the supportbracket.It is MOST IMPORTANT that the boiler is installedin a vertical position.(a) Casing retainingscrews, 2 offPacking baseControls pod casing10 DETERMINING THE FLUE LENGTH* Not for FF 3 100 modelFlue length mm Accessories Product No.Up to 600 B Pack 1 off 150308600 to 1550* B Pack 1 off + D Pack, 1 off 150308+1538831550 to 2500* B Pack 1 off + D Pack, 2 off 150308+153883, 2 off2500 to 3000* B Pack 1 off + D Pack, 3 off 150308+153883, 3 offNote.Vertex and roof flue kits are available as optionalextras for vertical flue installation, supplied withseparate fitting instructions.INSTALLATION