Extension Ducts - Fitting - IDEAL icos HE12 Installation And Servicing

back
20 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
21 FLUE EXTENSION DUCTS - continued
Use a maximum of 6m extended flue ONLY
General arrangement
maximum
1. A 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.
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.
icos -
Installation & Servicing
INSTALLATION
Flue support cutting aid
(shown folded up)
Flue duct support
Note. Side flue shown
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
Wall plugs - 4 off
No. 10 x2" wood screw - 4 off
Flue length
Extension flue
Standard 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
Terminal grille
Y
525
300
21