IDEAL icos system HE15 Installation And Servicing page 20

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18 FLUE EXTENSION DUCTS - For total flue lengths greater than 595mm
Pack D Flue extension duct kit contents.
Extension duct & clamp
1.0m (39") long
nm8732
19 FLUE EXTENSION DUCTS - continued
Use a maximum of 6m extended flue ONLY
General arrangement
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 Frames 18 & 25.
3. Only use water as a lubricant during assembly. Do
not use mineral based oils.
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.
20
INSTALLATION
Flue duct support
6. if the remainder Y is less than 300mm, shorten the
7. Measure and mark the length on the flue, to ensure a
70
950
esp8940
Flue support cutting aid
(shown folded up)
Wall plugs - 4 off
No. 10 x2" wood screw - 4 off
Flue length
Extension flue
Boiler
nm8733
previous 'D' pack to 400mm and adjust the telescopic
terminal.
square cut mark the flue all the way around and cut to
length.
L
icos system -
Standard flue
Terminal grille
Note. Side flue shown
Y
525
300
Installation and Servicing