Worcester GREENSTAR UTILITY

PRE-
IN STALLATION
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH
16
ROOM SEALED FLUE OPTIONS
8-716-106-256a (08.05)
ROOM SEALED FLUE OPTIONS
The diagrams (opposite) show the components
used and the maximum flue length (L) for each
flue configuration.
 To achieve the maximum flue length (L), a flue
section will have to be reduced in length.
 Only the flue terminal or straight flue extensions
can be reduced in length by cutting.
 The flue terminal end can be fitted from the
inside or outside of the building.
IMPORTANT:
All horizontal sections must rise away from
the boiler by 52mm per metre (3°) to allow
the condensate to drain back to the boiler.
A - Horizontal terminal
B - Straight flue extension
C - Flue bend 90°
D - Flue bend 45°
E - Vertical Terminal Kit (incl. 90° elbow)
Calculating the flue length:
Measure the total flue length required, noting that
the
maximum straight flue length including the
terminal is:
Horizontal 80/125mmØ: 4000mm (excluding
120mm of terminal extending outside the building).
Vertical 80/125mmØ: 6000mm (including the
vertical flue kit 90° elbow).
Then reduce the total straight flue length for each
extra flue bend (excluding the vertical flue kit 90°
elbow) by:
1000mm for 90°
500mm for 45°
Flue Extension lengths:
Horizontal & Vertical 80/125mmØ: 1000mm overall
length.
Effective length when engaged into sockets within
the flue run is 950mm.
Flue Terminal lengths:
Horizontal 80/125mmØ: 720mm
Vertical 80/125mmØ: 1080mm + cage.
to outside wall.
E
E
E
E
L = 5000mm
125mmØ x5
L
B
L = 5000mm
125mm
x4
L
D
D
B
L = 6000mm
125mmØ x6
L
B
L
L = 2000mm
125mmØ x2
C
B
A
L = 140 - 390mm
L
A
L = 4000mm
125mmØ x4
L
B
A
L
L = 3000mm
125mmØ x3
C
B
A
L = 3000mm
125mmØ x3
L = 3000mm
D D
B
A
L
125mmØ x3
B
A
C
L
B
C
D
A
x2