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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. 12 External disposal
8
1
7
Fig. 13 Condensate pump to external disposal
CONDENSATE SOAK AWAY
• 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.
Greenstar Ri
ErP
- 6 720 813 283 (2016/07)
11
9
25mm min.
6720644744-10.4Wo
9
25mm min.
Fig. 14 To a soakaway
4.5
6720644744-12.4Wo
• The pressure relief drain pipe (1) from the boiler should be at least
• Pipe (1) should be finished with a partial bend, near the outlet to face
1
500mm min.
8
15
15
16
19
PRESSURE RELIEF PIPE WORK
NOTICE:
▶ The pressure relief valve is a safety device for the
boiler and if activated may discharge boiling water or
steam through the relief valve drain pipe.
▶ Care should be taken when siting the outlet pipe so
that it does not cause an obstruction or discharge
above a window, entrance or other public access
where it could cause a hazard.
15mm diameter copper pipe and run downwards, away from any
electrical equipment or other hazard, preferably to an external drain
or soak away.
the external wall (as shown) to help prevent freezing.
PRE-INSTALLATION
400mm min.
25mm min.
11
9
16
17
18
6720819188-06.6Wo
15
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