Prepare The Wall - Grant Vortex Pro Internal Combi Series Installation And Servicing Instructions

9.6

pREpaRE thE WaLL

9.6.1 LOW LEVEL BaLanCED fLUE
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
9-17.
Note: This dimension is given with
the boiler pushed back against
the rear wall. Any clearances
Boiler
must be added to it.
centre line
Outline
A
of boiler
C
Rear exit
figure 9-17: Flue hole dimensions and position for low level
system
table 9-18: Low level balanced flue hole cutting dimensions
Model
A (dia.)
15/21, 15/26 127
26/36, 36/46 162
46/58, 58/70 162
! nOtE !
Dimension a given in figure 9-11 includes an extra 10 mm
over the size of the terminal to provide clearance for fitting.
Section 9: flue System and air Supply
A
B
Hole to be
C
cut in wall
S i d
a ll
e w
R e a r w
a l l
Side exit
Dimension (mm)
B C
115 768
115 780
112 1,102
9.6.2 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 9-19.
Hole to be
cut in wall
Standard kit with no extensions
A
Note: This dimension is given with
the boiler pushed back against
the rear wall. Any clearances
must be added to it.
Boiler
centre line
D
Outline
of boiler
C
Rear exit
figure 9-19: Flue hole dimensions and position for high level
system
table 9-20: High level balanced flue hole cutting dimensions
Model
A (dia.)
15/21, 15/26 175
26/36, 36/46 200
46/58, 58/70 200
* Dimension C for starter section and elbow/terminal only
! nOtE !
Dimension a given in figure 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.
A
B
Hole to be
cut in wall
a ll
R e a r w
S i d
e w
a l l
Side exit
Dimension (mm)
B C D
1,715 -
115 1,215*
2,115
1,700 -
115 1,280*
2,020
2,015 -
112 1,595*
2,335
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