20
INSTALLATION
evo HE C -
Installation and Servicing
FLUE OUTLET
1.
A
maximum
of 6 extension ducts for the C22/24
and C22/30 and a maximum of 3 extension ducts
for the C22/35 (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 and 26.
3.
Only use water as a lubricant during assembly.
Do not use mineral based oils.
19 FLUE EXTENSION DUCTS - continued
20 FITTING THE KIT
18 FLUE EXTENSION DUCTS - For total flue lengths greater than 595mm
Pack D Flue extension duct kit contents
Note.
Side flue shown
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
nm
8762
B
o
il
er
S
tandard
f
l
ue
T
erm
i
na
l
gr
ill
e
Fl
ue
l
ength
Ex
tens
i
on
f
l
ue
Use a maximum of 6m extended flue ONLY (C22/24 &
30)
Use a maximum of 3m extended flue ONLY (C22/35)
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
3
00
525
Y
950
70
esp
8940
