Technical information

Installation and servicing instructions strictly reserved
for qualified gas installers
27
WALL THICKNESS
DRILL AND
SCREW
COLLAR
BOILER
MOUNTING WALL
OUTSIDE
WALL FACE
112
“Y”
“Y”
INNER
PLASTIC
COLLAR
L
FLUE
OUTSIDE
WA
LL
FACE
C
OUTER
RUBBER
COLLAR
AIR
DUCT
FLUE
DUCT
COLLAR
DRILL
AND
SCREW
“Y”
INNER
PLASTIC
COLLAR
L
FLUE
OUTSIDE
WA
LL
FACE
C
OUTER
RUBBER
COLLAR
AIR
DUCT
FLUE
DUCT
COLLAR
DRILL
AND
SCREW
WALL THICKNESS
DRILL AND
SCREW
DRILL AND
SCREW
COLLAR
BOILER
MOUNTING WALL
OUTSIDE
WALL FACE
112
“Y”
Diagram 8.3
Diagram 8.6
12753
12750
Standard Top Rear flue - with the flue elbow
temporarily fitted, measure the distance from the
outside wall to the butt joint, see diagram 8.4. If
the measurement ‘Y’ exceeds 652mm , then the
appropriate length of extension pipe is required.
The minimum dimension is187mm (75mm min
wall thickness).
Telescopic Top Side flue - with the flue elbow
temporarily fitted, measure the distance from the
outside wall to the butt joint, see diagram 8.5. If
the measurement ‘Y’ exceeds 525mm, then the
appropriate length of extension pipe is required,
if the dimension is less than 320mm DO NOT cut
the flue, it can project to a maximum of 600mm,
if this is not desirable then a Standard flue MUST
be used and cut to length.
Diagram 8.4
12751
Standard Top Side flue - with the flue elbow
temporarily fitted, measure the distance from the
outside wall to the butt joint, see diagram 8.6. If
the measurement ‘Y’ exceeds 652mm, then the
appropriate length of extension pipe is required.
The minimum dimension is 270(Lhd) and 167(Rhd)
to suit a minimum wall thickness of 75mm.
Top rear flue - telescopic
Top rear flue - standard
Diagram 8.5
12752
Top side flue - telescopic
Top side flue - standard