Instruction manual
CONDENSATE PIPEWORK
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR CAMRAY EXTERNAL &
EXTERNAL SYSTEM 12/18-18/25-25/32
8 716 115 667a (05.2009)
13
PRE -
INSTALLATION
CONDENSATE PIPEWORK
CONDENSATE PIPEWORK:
• All national and, where appropriate, local
regulations for the discharge and neutralisation
of condensate should be followed.
• The condensate pipe must be a minimum of
21.5mmØ polypropylene pipe.
Routing the pipework:
Wherever possible, the condensate
pipework should be routed internally to
prevent freezing.
• The condensate pipework must fall at least
50mm per metre towards the outlet.
• Take the shortest practicable route.
• Support the pipe at least every 0.5m for near
horizontal sections and 1m for vertical sections.
When a boiler is to be installed in an unheated
location, such as a garage, all condensate
drainage pipes should be considered as external.
External pipework:
• The pipework length should be kept to a
minimum and the route as vertical as possible.
• Do not exceed 3 metres outside the dwelling.
• Terminate as close to the ground or drain as
possible(below the grating and above the
water level) while still allowing for safe
dispersal of the condesate. This helps to
reduce wind blowing up the pipe and freezing.
Connection of a condensate drainage pipe to a
drain may be subject to local building controls.
• Pipework subject to extreme cold or wind chill
conditions should be 32mm Ø pipe.
• Protect ALL external pipework with weather
resistant insulation and box-in, if necessary,
to reduce the risk of freezing.
Making it safe:
• Condensate pipework must not leak, freeze or
block up.
• Condensate traps must be filled before firing
up the boiler to prevent the possibility of
potetially harmful flue products evacuating via
the condensate route.
• Do not dispose of condensate into a water
recovery system where it is retained for reuse.
Condensate can be discharged into a rainwater
hopper which is part of a sewer system carrying
both rainwater and foul water.
• The pipework must follow one of the options
shown opposite:
A - Condensate from the boiler condensate
trap (supplied) which has a 75mm
minimum water seal.
B - Sink.
C - 21.5mm Ø polypropylene condensate pipe.
D - Gully.
E - Internal soil and vent stack.
F - 300mm x 100mm Ø sealed plastic tube.
G - Ground level.
H - Drainage holes 50mm from base of tube
(12mm Ø at 25mm centres) facing away
from building.
I - Limestone chippings.
E
C
Invert
450 min.
A
D
A
C
75mm
min.
a - Internal waste drainage system
A
B
C
D
400mm
min.
500mm min.
F
I
H
G
A
C
2
5mm
min.
2
00mm min.
U
n
su
it
abl
e
fo
r
clay
so
i
l
t
yp
e
s
b - Soil/vent stack
d - External condensate absorption point
c - External drainage system