21
icos - Installation & Servicing
INSTALLATION
FLUE OUTLET
1. A maximum of 6 extension ducts (one suitably
cut) plus the standard flue duct may be used
together.
2. Flue extensions of greater length than 1m (39")
should be supported with the bracket provided,
suitably adjusted. Refer to Frame 20 & 26.
3. Only use water as a lubricant during assembly.
21
FLUE EXTENSION DUCTS - continued
nm8733
Boiler
Standard flue
Terminal grille
Flue length
Extension flue
20
FLUE EXTENSION DUCTS - For total flue lengths greater than 595mm
Pack D Flue extension duct kit contents.
Note. Side flue shown
Use a maximum of 6m extended flue ONLY
General arrangement
Flue duct support
Flue support cutting aid
(shown folded up)
Wall plugs - 4 off
Extension duct & clamp
1.0m (39") long
No. 10 x2" wood screw - 4 off
nm8732
20
FITTING THE KIT
Because of the flexibility of the telescopic flue terminal it is not
always necessary to cut an extension pack.
1. Measure the total flue length from the centre of the boiler
outlet to the outside wall.
2. Subtract 70mm from this dimension.
3. Subtract 950mm for each ‘D’ pack to be used.
4. If the remainder Y is 300mm -
525mm this can be taken up
by the adjustment in the
telescopic flue.
5. If the remainder Y is 525mm -
950mm it will be necessary to
cut a ‘D’ pack to 400mm.
6. if the remainder Y is less than 300mm, shorten the
previous ‘D’ pack to 400mm and adjust the telescopic
terminal.
7. Measure and mark the length on the flue, to ensure a
square cut mark the flue all the way around and cut to
length.
L
300
525
Y
950
70
esp8940
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