Bosch Worcester Danesmoor Utility Regular ErP+ 12/18 Installation, Commissioning And Servicing Instruction Manual page 17

FITTING AN EXTERNAL AIR BREAK
• Refer to figure 18 when a rain water down pipe is used to dispose of
condensate.
• An air break must be installed in the 43mm pipe work, between the
boiler condensate outlet and the drainpipe, outside the property, to
avoid flooding during adverse weather conditions.
1
21.5mm Ø
8
Fig. 18 Disposal into a rainwater down pipe
Where the pipe terminates over an open drain or gully, the pipe should
terminate below the grating level, but above water level, in order to
minimise "wind chill" at the open end.
The use of a drain cover (such as those used to prevent blockage by
leaves) may offer further protection from wind chill.
Pipe drainage will be improved if the end is cut at 45° as opposed to a
straight cut.
1
8
Fig. 19 External disposal
8
1
7
Fig. 20 Condensate pump to external disposal
Greenstar Danesmoor Utility ErP+ and Utility System
10
9
11
12
13
14
11
9
25mm min.
6720644744-10.4Wo
9
25mm min.
6720644744-12.4Wo
ErP+ - 6 720 821 720 (2018/04)
CONDENSATE SOAK AWAY
• The condensate soak away must be sited at least 500mm away from
building footings.
• The condensate drainage pipe may be run above or below the ground
to the soak away. The examples shown on this page run above
ground.
• The soak away must use a 100mm Ø plastic tube with two rows of
three 12mm holes on 25mm centres and 50mm from the bottom of
the tube. The holes must face away from the house.
• The tube must be surrounded by at least 100mm of limestone
chippings to a depth of 400mm.
Minimum hole size for the condensate soak away must be
400mm deep by 300mmØ .
In situations where there are likely to be extremes of temperature or
exposure, the use of a proprietary trace-heating system for external pipe
work, incorporating an external frost thermostat, should be considered.
If such a system is used, the requirement to use 32mm pipe does not
apply. However, all other guidance above and the instructions for the
trace heating system, should be closely followed.
NOTICE: Unheated internal areas.
▶ Internal pipe runs in unheated areas such as lofts,
basements and garages should be treated as external
runs and consideration should be given to using a
CondenseSure siphon.
1
8
15
16
19
Unsuitable for clay soil types
Fig. 21 To a soakaway
Pre-Installation
400mm min.
25mm min.
500mm min.
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9
15
16
17
18
6720821683-30.1Wo
17