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Worcester-Bosch GB162-80 Manual

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Installation
6720813171 (2016/05) 23
8.3.6 Installation of the horizontal flue
The standard flue is suitable for lengths up to 660 mm ( fig. 32).
For longer flue runs up to 29.0 m for flue system 100/150 and 7.3 m for
flue system 80/125, flue extensions are available (accessory).
Fig. 32 Installation with horizontal flue gas terminal
[1] maximum length
[2] terminal assembly
[3] 90° bend
[4] finishing kit
[5] outer wall
8.3.7 Flue pipe preparation and assembly
▶ Measure the flue length L. Refer to figures 33 and 34.
Fig. 33 Flue length - rear
[A] 150 mm without the use of a wall spacing frame
[] 185 mm with the use of a wall spacing frame
[B] 337.5 mm for Ø 80/125 mm horizontal flue
[] 339.5 mm for Ø 100/150 mm horizontal flue
[L] flue length
Fig. 34 Flue length - side
▶ Mark off the lengths shown onto the pipe and cut to length. The cuts
must be square and free from burrs. Terminal assembly outer (air)
pipe - L-70 mm, inner (flue) pipe - L-50 mm. The measurement is
made from the ridge at the terminal indicating the outer face of the
wall. Refer to figure 35. Extension outer flue - L-70 mm, inner flue - L-
50 mm. The measurement is from the formed end.
Fig. 35 Flue terminal position
▶ Assemble flue system completely. Push the flue fully together.
The slope of the terminal outlet must face downwards ( fig. 35,
item 1). The assembly will be made easier if a solvent free grease is
lightly applied to the male end of the flue.
▶ Push the assembly through the wall and slide the terminal onto the
flue connector. Ensure that the terminal is fully entered into the
socket on the boiler.
▶ From the outside fix the flue finishing kit to the terminal and, after
ensuring the flue 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.
8.4 Flue gas connection
8.4.1 Open flue operation
If operation independent of room air is not desired or not possible due to
local conditions, the boiler can be set up for operation to take air for
combustion from the room (contact Worcester Technical).
The boiler is factory-fitted with a concentric connection.
An air intake strainer basket can be used for operation dependent on
room air. This prevents falling dirt from entering the boiler (contact
Worcester Technical; accessory).
8.4.2 Room sealed operation
The boiler can be connected to a concentric flue gas system.
The boiler is factory-fitted with a concentric connection.
8.4.3 Flue material
When using plastic flue material, PPS is recommended.
8.4.4 Calculating the air intake and flue gas pipe dimensions
The total reduced pipe length is calculated from the sum of the reduced
length of the horizontal and vertical flue ducting and the reduced length
of every elbow ( table 7).
The total reduced pipe length must be less than the maximum pipe
length ( table 6).
See also the next example.
The flue must be inclined from the boiler.
6 720 648 726-032.1TD
5
4
3
2
1
A
L
B
6 720 648 726-031.1TD
L
6 720 648 726-034.1TD
An inner flue finishing kit is provided which should be
fitted to the ducts before assembly.
6 720 648 726-035.1TD
4
3
2
1
… 23 …


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