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1
Installation
1.7.8
Installation of the horizontal flue
The standard flue is suitable for lengths upto 660 mm
(see fig. 20). For longer flue runs upto 12.0 m, extension
air/flue ducts are available.
NOTE
Use the wall-mounting template to help you
mark the position of the side flue opening
1.7.9
Flue duct preparation and assembly
Measure the flue length L. Refer to figures 21 and 22.
NOTE
The flue must be inclined from the boiler.
Mark off the lengths shown onto the ducts and cut the
length. The cuts must be square and free from burrs.
Terminal assembly outer (air) duct - L-70 mm, inner (flue)
duct - L-50 mm. The measurement is made from the ridge
at the terminal indicating the outer face of the wall.
Refer to figure 23.
Extension air duct - L-70 mm, flue duct - L-50 mm.
The measurement is from the formed end.
Assemble flue system completely. Push the ducts fully
together. The slope of the terminal outlet must be face
downwards (see fig. 23, item 1).
The assembly will be made easier if a solvent free grease
is lightly applied to the male end of the ducts.
NOTE
An inner flue finishing kit is provided which
should be fitted to the ducts before assembly.
Push the assembly through the wall and slide the turret
onto the flue connector. Refer to figure 19. Ensure that the
turret is fully entered into the socket on the boiler.
From the outside fix the flue finishing kit to the terminal and,
after ensuring the duct is properly inclined towards the
boiler, fix the finishing kit to the wall.
If the terminal is within 2 m of the ground where there is
access then an approved terminal guard must be fitted.
The guard must give a clearance of at least 50 mm around
the terminal and be fixed with corrosion resistant screws.
Subject to modifications resulting from technical improvements!
20
Installation and maintenance instructions for Buderus 500 - 24/C and 500 - 28/C • 02/2005
Maximum length
Flue turret
fig. 20 Installation with horizontal flue gas turret
A
fig. 21 Flue length - rear
Item A = 150 mm without the use of a wall spacing frame
Item A = 185 mm with the use of a wall spacing frame
fig. 22 Flue length - side
Flue Finishing Kit
Outer
Wall
Face
fig. 23 Flue terminal position
Boulter Buderus Ltd. • http://www.boulter-buderus.co.uk
Terminal
assembly
Finishing kit
Outer
Wall
L
L
1
Flue Terminal
Raised Ring
locating the
terminal relative
to the outside
wall face
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