39
Flue System and
Air Supply
9.5 Prepare the Wall
If the boiler is to be used with a low level
balanced flue (Yellow system) make the
hole in the wall for the flue as shown in
Figure 9-11.
dimension B given in Figure 9-11
includes an extra 10 mm over the size
of the terminal to provide clearance
for fitting.
9.6 High Level and Vertical Balanced
Flue
If the boiler is to be used with the high
level balanced flue (White system) make
the hole in the wall as shown in Figure
9-12.
dimension B given in Figures 9-12
includes an extra 10 mm over the size
of the terminal to provide clearance
for fitting.
Fitting instructions for the high level
balanced flue and vertical balanced flue
are supplied with the flue kits.
Adjustable extensions
The adjustable extensions are telescopic.
The wall terminal section is adjustable
and is suitable for a wall thickness of 215
mm to 450 mm.
Simply adjust to the required length
using a twisting motion. The outer pipes
must overlap by a minimum of 25 mm.
NOTE
!
NOTE
!
Side
wall
Rear
wall
Note:
This dimension is given with
the boiler pushed back against
the rear wall. Any clearances
must be added to it.
Hole to be
cut in wall
Boiler
centre line
Outline
of boiler
Rear exit
Side exit
C
C
A
A
B
*Dimension C for Starter section and elbow/terminal only
Side
wall
Rear
wall
Note:
This dimension is given with
the boiler pushed back against
the rear wall. Any clearances
must be added to it.
Hole to be
cut in wall
Hole to be
cut in wall
Boiler
centre line
Outline
of boiler
Rear exit
Side exit
Standard kit with no extensions
D
C
A
A
B
Figure 9-11:
Flue hole dimensions and position for low level systems
Figure 9-12:
Flue hole dimensions and position for high level system
15/21, 15/26
26/36, 36/46
46/58, 58/70
C
768
780
1102
dimension (mm)
Model
A dia
127
162
162
B
115
115
112
15/21, 15/26
26/36, 36/46
46/58, 58/70
C
1215*
1280*
1595*
dimension (mm)
Model
A dia
175
200
200
B
115
115
112
d
1715 - 2115
1700 - 2020
2015 - 2335
