Ferroli OPTIMAX 25 S Instructions For Use, Installation And Maintenance page 16

Connection with concentric fl ue system
The unit can be connected to a concentric air/fl ue duct with a wall or rooftop outlet as shown on the
following drawings. Numerous accessories are available on request to meet the various installation
requirements. Please refer to our "fl ue manual" or the price list.
Standard 1KWMA53A
Flue kit
110
30
95
View from above
175
30
95
fi g. 10a
Horizontal fl ue installation
1. Defi ne the position for installing the unit.
2. If using standard fl ue (1KWMA53A) this must be installed level, for non-standard fl ue lenghts over 1
Mtr a fall of 3 mm per metre should be incorporated.
3. Make a hole of diameter 10 - 20 mm greater than the nominal diameter of the concentric pipe
used.
4. If necessary, cut the end pipe to size, ensuring that the external pipe protrudes from the wall by
between 10 and 60 mm (fi g. 10a and 10b). Remove the cutting burrs.
5. Connect the fl ue to the boiler, positioning the seals correctly. Seal the fl ue into the wall with silicone
or sand + cement and cover with wall seals provided.
Flue seals should be lubricated with a silicone type grease to prevent damage (grease not sup-
plied)
16
Standard concentric fl ue installation
Rear Outlet
Side view
P
S 50* 125
* = between
10 e 60 mm
Install level
Install level
110
S 50*
P
P = S + 160 mm
Optimax 25 S
Side Outlet
Front view
L
30
95
215 185
D
View from above
30
95
215 185 D
L
fi g. 10b
L = S + D + 170 mm
50*
* = between
10 e 60 mm
Install level
S
Install level
S 50*