Worcester 26CDi XTRA Installation And Servicing Instructions page 17

10.4 Air and Flue Duct Preparation and
Assembly
Check the contents of the Standard Flue or the Extended Flue
against their respective packing list.
Remove all the packing from the ducts and terminal assembly.
NOTE:
The air duct is 100mm diameter and flue duct is 60mm diameter.
WARNING: The air and flue ducts are manufactured from
aluminium and must be handled with care.
Measure and cut the air and flue ducts to length ensuring that
the cuts are square and free from burrs. Always check the
dimensions before cutting the ducts.
The Standard Flue assembly, when measured from the
appliance casing to the outside of the wall, accommodates a flue
length of:
Rear flue - 1030mm maximum.
Side flue - 1000mm maximum.
Refer to dimension L mm on figs. 21 and 22.
Fig. 21. Flue Duct Length (rear flue).
Rear face of appliance
and face of mounting
wall
Fig. 22. Flue Duct Length (side flue).
Appliance side
panel
NOTE:
i) When dimension L is greater then 1030mm (rear flue) or
1000mm (side flue) the Extended Flue assembly must be
fitted.
ii) The Standard Flue assembly cannot be extended beyond
the above maximum lengths.
Make good
External
wall
face
L
Make good
External
wall
face
L
When assembling air and flue ducts, ensure they are correctly
located in the socket joints. Refer to figs. 23 and 24.
Take care to seal all the flue joints where indicated. To seal the
flue joints, disengage the joint and apply a smear of silicone
sealant around the duct. See figs. 23 and 24.
On final assembly, the air duct must be adequately supported.
Air duct support brackets are available as an optional extra.
See Section 10.1 for air duct support bracket part number.
10.5 External Fitting of the Flue Duct
Rear Flue Assembly.
a) Measure distance L. See fig. 23 and 24.
Air duct length
Flue duct length
b) NB: i) The flue duct is supplied fixed to the flue terminal. It
must not be removed. The lip on the terminal
marked "BOTTOM" must be at the bottom of the
assembly.
ii) Do not cut the grooved end of the air duct.
c) Measure the flue duct length from the measuring ring, located
on the flue duct, near the flue terminal. Cut the duct to size. See
fig. 23.
d) Measure the air duct length from the grooved end of the duct.
Cut the duct to size. See fig. 23.
e) Pass the air duct, grooved end first, over the flue duct and fit
into the flue terminal. Ensure the air duct is fully located into the
flue terminal.
f) Drill through the holes in the flue terminal into the air duct
with the drill provided. Fix the flue terminal temporary with the
screws provided.
NB: When assembled correctly the flue duct will extend 44mm.
beyond the air duct. See fig. 23.
g) Undo the screws and ease the air duct clear of the flue
terminal. Apply a bead of silicone sealant, provided, around the
groove in the air duct. Reassemble the air duct into the flue
terminal. Fix permanently with the original screws.
h) From outside, pass the flue assembly through the wall. Locate
the flue duct into the flue outlet on the turret.
i) Ease the flue duct into the turret and then ease the air duct
into the turret until fully located. See fig. 24.
j) Drill through the holes in the turret into the air duct and fit
temporary with the screws provided. See fig. 24.
k) Undo the screws and ease the air duct just clear of the turret.
Apply a bead of silicone sealant, provided, around the air duct.
Reassemble into the turret and fix with the original screws. See
fig. 24
l) Align the flue turret with the 4 holes on the appliance. Ensure
the flue outlet from the fan is correctly engaged in the turret and
the sealing gasket is in place. Screw the turret onto the top of the
inner casing. See fig. 20.
m) Make good the internal and external brickwork or rendering.
Side Flue Assembly.
a) Measure distance L. See fig. 23 and 24.
Air duct length
Flue duct length
b) NB: i) The flue duct is supplied fixed to the flue terminal. It
must not be removed. The lip on the terminal
marked "BOTTOM" must be at the bottom of the
assembly.
ii) Do not cut the grooved end of the air duct.
c) Measure the flue duct length from the measuring ring, lacated
on the flue duct, near the flue terminal. Cut the duct to size. See
fig. 23.
d) Measure the air duct length from the grooved end of the duct.
Cut the duct to size. See fig. 23.
e) Pass the air duct, grooved end first, over the flue duct and fit
into the flue terminal. Ensure the air duct is fully located into the
17
Assembly
= L + 166mm.
= L + 166mm.
= L + 194mm.
= L + 194mm.