Worcester C1 Installation And Servicing Instructions page 14

Fig.20. Standard flue assembly
Flue
turret
assembly
Telescopic adjustment
Appliance casing
If L is greater than 725mm then extension duct kit/s will be
required - each kit extends the flue by 750mm up to a maximum
of 2975mm. See table below.
EXTENSION
1
2
3
Fig.21. Extension duct
Flue
turret
assembly
Appliance
Fig.22. Flue duct length - side
Flue
turret
assembly
Terminal
assembly
L
Fixing screw
MAXIMUM FLUE LENGTH mm
1475
2225
2975
Fixing screw
casing
11.9 Measure and Cut the Ducts.
General: Cut the ducts as necessary, ensuring that the ducts are
square and free from burrs. Always check the dimensions before
cutting.
Measure the distance L. Refer to Fig. 22 and 23.
The standard flue can be telescopically adjusted to any length
between 425mm and 725mm measured from the centre of the turret.
Fix the flue assembly together using the self-tapping screw
provided. Refer to Fig. 20.
It will only be necessary to cut the standard assembly if L is less
than 425mm. Cut the flue turret assembly and the terminal
assembly by the same amount i.e L=350 - remove 75mm from
each assembly.
Minimum side flue length = 330mm
10mm Service clearance and a 100mm wall)
Minimum rear flue length = 300mm
100mm wall)
If L is between
it is not necessary to cut the ducts.
If L is between
It is necessary to shorten the assembly by cutting the first
extension duct assembly i.e. L = 1000mm - remove 175mm
from the air and flue ducts.
L
Fixing screw
Ducts of equal length
L
14
(accommodating a
(accommodating a
1175 - 1475mm (1 extension)
1925 - 2225mm (2 extension)
2675 - 2975mm (3 extension)
725 - 1175mm (1 extension)
1475 - 1925mm (2 extension)
2225 - 2675mm (3 extension)
Terminal
assembly
Terminal
assembly