Worcester Highflow 400 RSF Installation And Servicing Instructions page 21

Apply a smear silicone sealant around the inside of the air duct.
Re-assembly the air duct over the flue duct, ensure the flue duct
fits into the flue terminal and the air duct fits over the flue
adaptor. Fix with the screws provided.
The flue system is now assembled. See Fig. 21.
From inside or outside the dwelling pass the flue assembly
through the hole in the wall.
Temporarily support the flue system, ensure it is horizontal and
Fig. 19. Flue Option 1: Standard horizontal rear flue.
Flue Option 2: Extension horizontal rear flue.
Outside of wall
Base outline of appliance
marked on floor
will align with the flue position on the rear of the inner casing.
Carefully ease the appliance into the position previously marked.
Ensure the flue position located on the rear of the appliance is
correctly aligned with the centre-lines of the flue.
Fit the flue adaptor into the flue grommet located on the rear of
the inner casing. See Fig. 21.
Ensure it is located correctly against the stop. Fully tighten the
clamping screw accessible on top of the inner casing. See Fig. 14.
Note: Do not apply a smear of silicone sealant around the end of
the flue duct that fits into the flue terminal.
Make good the internal and external brickwork or rendering .
11.5 STANDARD HORIZONTAL SIDE FLUE ASSEMBLY
INCLUDING ONE 90° FLUE BEND.
(FLUE OPTION 2). See Fig. 20.
IMPORTANT: A flue restrictor ring MUST be fitted in the flue
terminal. Refer to Section 11.3 for the correct size and the
following instructions for fixing. See Fig. 24.
HORIZONTAL SIDE FLUE ASSEMBLY.
Measure accurately, the distance from the side of the appliance
cabinet, previously marked on the floor, to the outside surface of
the wall. Dimension A. See Fig. 20.
Air duct length = A + 244 mm.
Flue duct length = A + 284 mm.
Cut the air and flue ducts to length. Do not cut the drilled end of
the air duct.
IMPORTANT: Fit the flue restrictor ring marked 75 into the flue
terminal. See Fig. 24.
Assemble the air duct to the flue terminal. Ensure it fits fully into
the flue terminal and the restrictor ring is located firmly between
65
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Distance from the
A
rear of the base
outline of appliance
to the outside
surface of the wall
Front of appliance
the end of the air duct and flue terminal. See Fig. 24.
Drill through the holes in the flue terminal into the air duct with
the drill provided. Apply a smear of silicone sealant to the end of
the air duct and fix into the flue terminal using the screws
provided. See Fig. 22.
Fit the flue duct into the flue bend. Ensure it is located correctly
against the stop. Drill two holes through the holes in the flue
bend. See Fig. 22.
Air duct Flue duct
= (A + 188) mm = (A + 228) mm
Flue adaptor must be fitted
Standard horizontal rear flue.
Flue Option 1: Dimension A = 500 max.
Extension horizontal rear flue.
Flue Option 3: Dimension A = 3000 max.
Fit the air duct over the outside of the flue duct. Ensure it is
located correctly against the stop. Drill two holes through the
holes in the air duct.
Disconnect the air and flue ducts from the flue bend.
Loosely assemble the flue duct into the air duct and engage in
the flue terminal. From outside the dwelling pass the assembly
through the hole in the wall.
From inside ease the flue duct sufficiently clear of the air duct to
fit the flue bend.
Apply a smear of silicone sealant around the outside of the flue
duct. Fit the flue duct into the flue bend and fix with the screws
provided. See Fig. 22.
Apply a smear of silicone sealant around the outside of the flue
bend.
Assemble the flue bend into the air duct and fix with the two
screws provided. Ensure the flue duct is correctly engaged in the
flue terminal. See Fig. 22.
Note: Do not apply a smear of silicone sealant around the end of
the flue duct that fits into the flue terminal.
The flue system is now assembled. See Fig. 22.
Support the flue system temporarily so that it lines up with the
flue centre-lines previously marked.
Carefully ease the appliance into the position previously marked.
Ensure the flue position, located on the rear of the appliance, is
correctly aligned with the flue centre-lines previously marked.
Fit the flue bend into the flue grommet located on the rear of the
inner casing.
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