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Pre-Installation
• Minimise the number of bends and connectors.
• Remove burrs after cutting pipe.
• Remove surplus solvent from the interior of the pipe.
• The condensate pipe work shall be run in standard drainpipe
material, e.g. poly(vinyl chloride) (PVC), unplasticized (vinyl
chloride) (PVC-U), acrylonitrilebutadiene.styrene (ABS),
polypropylene (PP) or chlorinated poly(vinyl chloride) (PVC.C).
4.5.1
Appliance siphonic condensate trap
The appliance has a large capacity condensate trap reducing the risk of
condensate discharge pipe work freezing up in prolonged cold
temperatures.
The expanded siphonic operation discharges every 10 to 20 minutes.
Resulting in:
• Increased velocity and flow rate.
• With less frequent siphonic actions per hour, the condensate pipe
work is empty for longer.
• Significantly reducing freezing potential for a 48 hour period at -
15 °C, provided the installation parameters listed below are followed.
4.5.2
Condensate pipe work
NOTICE:
General consideration
▶ Where a new or replacement appliance is being installed, access to
an internal "gravity discharge" point should be one of the factors
considered in determining appliance location.
▶ Condensate pipe connection at the appliance:
The condensate pipe must have a nominally outside diameter of
22mm plastic pipe.
▶ Ensure there are no blockages in the pipe run.
▶ Ensure that the discharge method for the installation can effectively
handle the condensate waste from the appliance.
Condensate pipe work - Unheated internal areas
NOTICE:
Unheated internal areas.
Although the large volume siphon will reduce the risk of freezing,
condensate discharge may freeze in areas during prolonged cold
temperatures.
▶ Internal pipe runs in unheated areas such as lofts, basements and
garages should be treated as external runs.
For additional information refer to "External Connections" section.
4.5.3
Internal connections
Soil stack connection
Figure 32
In order to minimise risk of freezing during prolonged cold spells, the
following methods of installing condensate drainage pipe should be
adopted.
Wherever possible, the condensate drainage pipe should be routed and
terminated so that the condensate drains away from the appliance under
gravity to a suitable internal foul water discharge point such as an
internal soil and vent stack. A suitable permanent connection to the foul
waste pipe should be used.
24
1
2
Fig. 32 Disposal to soil vent stack
[1]
Condensate discharge from appliance
[2]
Soil and vent stack
[3]
Minimum 450mm and up to 3 storeys
Waste pipe connection
Figure 33
Alternatively if the first option is not possible an internal kitchen,
bathroom or washing machine waste pipe etc. can be used.
Ensure that the condensate drain pipe is connected "down stream" of
the waste trap.
1
1
Fig. 33 Waste pipe disposal
[1]
Condensate discharge from appliance
[5]
Visible air break at plug hole
[6]
75mm sink waste trap
Condensate pump
Figure 34
Where direct connection to a "gravity discharge" pipe work is not
physically possible, or where very long internal runs would be required to
reach a suitable discharge point, condensate should be removed using a
proprietary condensate pump, of a specification recommended by the
condensate pump manufacturer.
• The pump outlet should discharge to a suitable "gravity discharge"
outlet.
– The condensate then flows, by gravity, through the 22mm plastic
pipe to the condensate discharge point.
Greenstar 8000 Life – 6720883858 (2019/02)
3
5
75mm
6
min.
5
75mm
min.
6
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