Ferroli optima 2001 VMF7 Installation Instructions Manual page 15

4.0 PREPARING THE FLUE ASSEMBLY
4.1 Rear Flue Outlet (fig. 12)
Important - The aluminium flue pipe must protrude into the outside grill by 2 in (50 mm), never cut it to the same length
as the plastic air pipe (aluminium flue pipe = plastic air inlet pipe + 50 mm !).
Aluminium flue pipe length = Plastic air inlet pipe length plus 50 mm (2") longer.
4.1.1 Accurately measure the Wall thickness (P1)
4.1.2 From the end opposite to the terminal, cut the plastic
air duct (dimension A1) to length (P1 + 105 mm).
Note - That the terminal is not included in A1.
4.1.3 Cut the metal flue duct to length (P1 + 155 mm)
(dimensions F1).
Note - The metal flue pipe must be 50 mm (2 inches)
longer than the plastic air inlet pipe.
4.1.4 Drill a 3 mm hole 15 mm from the plain end of plastic
air duct.
4.1.5 Place flue components to one side to be used later.
4.2 Side Flue Outlet (fig. 13).
Important - The aluminium flue pipe must protrude
into the outside grill by 2 in (50 mm), never cut it to the
same length as the plastic air pipe.
Side Flue Outlet
Fig. 13
2001
÷
K = 10 60 mm
Fixing screw
Air sealing sleeve
Rear flue Outlet
Fig. 12
Make sure flue slopes 2
boiler that is 35 mm fall per metre of flue length
Aluminium flue pipe length = Plastic air inlet pipe length
plus 50 mm (2") longer.
4.2.1 Accurately measure the Wall thickness (P2).
4.2.2 Accurately measure the distance from the centre of the stud fixing of the
mounting jig assembly to the side wall (Q2).
4.2.3 From the end opposite to the terminal, cut the plastic air duct (dimension
A2) to length (P2 + Q2 + 125 mm).
Note - That the terminal is not included in length A2.
4.2.4 Cut the metal flue duct to length (P2 + Q2 + 175 mm) (dimension F2).
Note - The metal flue pipe must be 50 mm (2 inches) longer than the
plastic air inlet pipe.
4.2.5 Drill a 3 mm hole 15 mm from the plain end of plastic air duct.
4.2.6 Place flue components to one side to be used later.
F1 (Flue outlet)
Fixing
K
screw
A1 (Air intake)
°
down towards the
15