Condensate Pipework - Worcester Greenstar Heatslave 12/18 Instruction Manual

8 716 106 252f 30/3/10 12:56
b
C
A
Invert
d
C
A
K
J
K
L
J - Outside wall.
K - Drain pipe.
L - External drain.
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE 12/18-18/25-25/32
8 716 106 252f (03/2010)
Page 13
a
C
B
A
75mm
min.
c
E
C
A
(Unsuitable for clay soil types)
500mm min.
F
200mm min.
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 outlet
pipe so that it does not cause an obstruc-
tion or discharge above a window, entrance
or other public access where it could cause
a hazard.
CONDENSATE &
PRESSURE RELIEF 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.
• The condensate pipework must fall at least 50mm
D per metre towards the outlet and should take the
shortest practicable route.
• Support the pipe at least every 0.5m for near
horizontal runs and 1m for vertical runs.
• When a boiler is to be installed in an unheated
location, such as a garage, all condensate
pipes should be considered as external.
External pipework:
• The 21.5mmØ pipe must not exceed 3 metres
outside the building. If a run greater than 3m is
required, 32mmØ pipe must be used.
D
• Any pipe exposed to windchill or extreme cold
must be 32mmØ.
• Protect all external pipes with weather resistant
insulation and box-in, if necessary to reduce the
risk of freezing.
• 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 condensate. This will help
25mm
reduce windchill freezing.
min.
Connection of a condensate pipe to a drain may be
subject to to local building regulations.
G
Making it safe:
• Condensate pipework must not leak, freeze or
400mm
I
min.
block up.
H
• Condensate traps must be filled before starting
up the boiler to prevent potentially harmful flue
products escaping via the condensate route.
• Do not dispose of condensate into water
recovery systems.
Condensate can be discharged into a rain water hop-
per which is part of a sewer system carrying both rain
water and foul water.
• The pipework must follow one of the options
shown opposite:
a - Internal waste drainage system
b - Soil/vent stack
c - External drainage system
d - External condensate absorption point
A - Condensate from the boiler internal
condensate trap which has a 75mm 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.
PRESSURE RELIEF PIPEWORK:
• The pressure relief drain pipe (K) should be at least
15mm diameter copper pipe and run downwards away
from the boiler and discharge away from any electrics
or other hazard, preferably to an external drain or soak
away.
• Pipe (K) should be finished with a partial bend, near
the outlet to face the external wall (as shown) to help
prevent freezing.
CONDENSATE &
PRESSURE RELIEF PIPEWORK
13