Installation manual

PRE-INSTALLATION
8 716 115 519a (2009/03)
9
4.2 INSTALLATION CLEARANCES
4.3 REQUIREMENTS FOR THE CHIMNEY
CHIMNEY SIZE
Before starting with the flue installation:
B Ensure the cross section of the chimney complies
with table 8 below and figure 3 opposite.
Fig. 3 Chimney sizes
FIRE RESISTANCE
The materials used for the construction of the chimney
must be fire resistant in compliance with the figures
stated below.
4.4 PREPARING THE CHIMNEY
• The chimney must be swept if it has been previously
used for an appliance burning a fuel other than gas.
• It is recommended that the chimney be swept before
installation of the flexible flue.
• Any damper or restrictor plate in the chimney must be
removed.
If it is not possible to remove the sliding damper it
must be fixed permanently in the open position.
• Any holes in the chimney must be sealed.
• The existing chimney pot and flaunching must be
removed.
• The catchment space (void below the point of flue
connection) must be checked to ensure it complies
with the flue to be installed.
• All debris must be cleared from the catchment space.
• To avoid debris falling into the air inlet duct, do not
install the duct with the open end facing up the
chimney.
For information regarding installation
clearances please refer to the appliance
installation manual.
c
min
c
max
Ød
min
Ød
max
130mm 300mm 146mm 300mm
Table 8: Chimney sizes
Type of building Fire resistance
single storey building 30 minutes
multi storey building 90 minutes
Table 9: Fire resistance of chimney material
Only one appliance can be fitted to the
flexible flue system.