Balanced External Oilfit Flue Options - Bosch GREENSTAR HEATSLAVE EXTERNAL 18/25 Instruction Manual
Open vent & sealed central heating systems with mains fed domestic hot water
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Also See for GREENSTAR HEATSLAVE EXTERNAL 18/25:
- Instruction manual (52 pages) ,
- User instructions & customer care manual (20 pages) ,
- Users instructions and customer care manual (16 pages)
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8 716 113 389d
30/3/10
14:01
High level horizontal terminal (rear outlet)
L = 5000mm
E
125mmØ x5
Vertical terminal (rear outlet)
L = 4000mm
E
125mmØ x4
Vertical terminal (rear outlet)
L = 4000mm
125mmØ x4
Vertical terminal (side outlet)
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
8 716 113 389d (03/2010)
All manuals and user guides at all-guides.com
Page 17
L = 2000mm
L
F
*
B
125mmØ x2
**
L
B
**
L
D
D
B
**
L
E
C
B
**
BALANCED EXTERNAL OILFIT
FLUE OPTIONS
IMPORTANT: The weather seal (supplied)
must be fitted to every flue joint to give
the required level of weather protection.
The diagrams (opposite) show the components
used and the maximum flue length (L) for
each flue configuration.
In all cases L is measured from the outside of
the boiler casing.
• To achieve the maximum flue length (L), a flue
section will have to be reduced in length.
• Only the straight flue extensions can be
reduced in length by cutting.
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.
C
D
B
F
B - Straight flue extension
C - Flue bend 90°
D - Flue bend 45°
E - Vertical Terminal Kit (incl. 90° elbow)
F - Horizontal 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: 2000mm.
Vertical 80/125mmØ: 5000mm.
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: 1000mm overall length.
Effective length when engaged into sockets
within the flue run is 950mm.
Flue Terminal lengths:
Horizontal oilfit external = 305mm
Vertical oilfit external 80/125mmØ =
185mm + cage
* Rear exit only.
** Horizontal flue runs should be kept as
short as possible. For satisfactory flue
performance we recommend that no more
than two metres of the vertical flue is run
horizontally.
BALANCED EXTERNAL OILFIT
FLUE OPTIONS
E
17
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