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5
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----------
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~·~---f--
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25mm
m1n.
-- H
400mm
m1n.
-
..............
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"~\,
CONDENSATE PIPEWORK
\
\
\
4
'I
'I
~
'I
'I
A+
~
'I/~
'I
D
'I
:
~'
'I
Internal
sink/washing
machine
drain
2 Internal
waste
drainage
system
3
Soil/vent
stack
4 External
drainage
system
5 External
condensate
absorption
point
A - Condensate from boiler
B-
Sink
C-
22
mm
0 plastic condensate pipe
D-
Gulley
E - Internal soil and vent stack
F
- Serviceable waste trap (75
mm
min)
G-
300
mm
x 100
mm
0 sealed plastic
tube
H - Ground level
J - Drainage holes
50
mm
from base of
tube
(12
mm
0 at 25
mm
centres)
facing away from
building
K - Limestone chippings
L-
M,O-
N-
Outside wall
Drain pipe
External drain
CONDENSATE PIPEWORK
CONDENSATE PIPEWORK:
The
condensate pipe must be a minimum of
22
mm
0 plastic pipe.
The condensate
pipework
must
fall
at
least
50
mm
per
metre
towards
the
outlet
and
should
take
the
shortest
practicable route.
The
pipework must follow
one
of
the
options
shown opposite into
an
internal
serviceable
trap
(min.
75
mm)
such
as
a sink/washing
machine)
and
discharge direct into a vent stack
(E)
min.
450
mm
above pipe
invert
or into a
gul-
ley
(D)
below ground but above
the
water
level.
Wherever possible the condensate dis-
charge pipe work should
be
routed and ter-
minated internally. Should this not be possi-
ble,
and the only available route is external,
the following conditions should be
observed:
Pipe work length should be kept to a
minimum and the route as
vertical as
possible.
Where pipe work could be subjected to
extreme
cold or wind chill, a weather
proof
insulation should be used.
Alternatively the condensate pipework
could
be
increased to a minimum
32
mm
without the requirement to insulate.
IMPORTANT:
Ensure
there
are
no
block-
ages
in
the
pipe
run.
PRESSURE RELIEF PIPEWORK
IMPORTANT:
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
out-
let
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.
The
pressure relief drain pipe (M,O) from
the
boiler should be at least
15
mm
diameter
copper pipe and
run
downwards away from
any
electrics or other hazard, preferably to
an
external drain or soakaway.
Pipe (M) should
be
finished with a partial
bend, near the outlet to face the external
wall
(as shown) to help prevent freezing.
Use waterproof pipe
insulation
in
exposed
positions and for
external pipework.
INSTALLATION & SERVICING INSTRUCTIONS
FOR
WORCESTER BOSCH GREENSTAR
25CDI/30CDI/37CDI/42
co;
~ORCESTER
6 720
613
700a
(2006/11)
Bosch
Group
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