External Connections - Bosch Worcester 2000 Series Installation And Maintenance Instructions Manual

Waste pipe connection
 Figure 30
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 and that the condensate drain enters into the top of the
pipe using a swept tee.
1
1
Fig. 30 Waste pipe disposal
[1] Condensate discharge from appliance
[5] Visible air break at plug hole
[6] 75mm sink waste trap
Condensate pump
 Figure 31
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.
8
1
7
Fig. 31 Condensate pump example
[1] Condensate discharge from appliance
[7] Condensate pump
[8] Pipe work transition
[C] Gravity discharge pipe work
Proprietary condensate pump
▶ Ensure minimum and maximum pump lifting heights are followed as
per condensate pump manufacturers instructions.
Worcester 2000 – 6 721 814 551 (2019/09)
5
75mm
6
min.
5
75mm
min.
6
Max.
C
Min.
4.5.4

External connections

NOTICE:
Risk of condensate discharge freezing
▶ No external disposal of condensate unless the CondenseSure
siphon or a condensate pump is fitted.
NOTICE:
Rainwater down pipe or external drain disposal
Untreated condensate must not be allowed to flow into streams or rivers
▶ A rainwater down pipe or an external drain shall only be used for
condensate disposal if the down pipe or external drain is connected
to a combined foul and rainwater drainage system
▶ Refer to BS 6798 for more information on condensate disposal
NOTICE:
Grey water recovery system
Contamination of recovered water
▶ Condensate disposal shall not be allowed into a grey water recovery
system that is intended for re-use
External disposal considerations
NOTICE:
Freezing conditions
Frozen condensate will block the condensate drain pipe and stop the
appliance from running
▶ Pipe lengths should be kept to a minimum and the routed as vertically
as possible.
NOTICE:
Condensate waste disposal
▶ Care should be taken when siting a soak-away to avoid causing
damage to existing services and building footings.
If no other discharge method is possible then the use of an externally run
condensate drainage pipe terminating at a suitable foul water discharge
point, or purpose-designed soak away, may be considered. If this
method is chosen then the following measures should be adopted:
▶ A CondensSure external siphon accessory (part number:
7716192746) or third party condensate pump must be used.
▶ The external run be kept as short as possible and ideally should not
exceed three metres.
Additional precaution against freezing must be taken if the external
pipe run does exceed three metres.
▶ The pipe should be run internally as far as possible before going
externally and the pipe diameter should be increased to a minimum
internal diameter (ID) of 30mm before it passes through the wall to
the exterior. The pipe should be insulated externally using suitable
waterproof and weather resistant insulation.
▶ The hole through the wall for the condensate pipe should be sealed to
the building fabric on the internal and external face using a suitable
building material.
▶ The external pipe should take the shortest and least exposed route to
the discharge point, and should "fall" as steeply as possible away
from the appliance, with no horizontal runs in which condensate
might stand.
Pre-Installation
25