1m
50mm (min.)
H
F
J
K
L
G
L
S
T
U
500ml
O
R
M
P
B
C
D
E
N
W
PIPEWORK CONNECTIONS
A -
CH flow 22mmØ copper (28mmØ on
25/32 models)
B -
DHW pipe stat
C -
DHW flow 22mmØ
D -
DHW water main inlet 15mmØ
E -
CH return 22mmØ copper (28mmØ on
25/32 models)
F -
10mmØ oil supply connection
G -
Oil isolating valve (10mmØ)
H -
Flexible oil hose*
J
-
Flue manifold condensate outlet
K -
Condensate outlet and flexible push fit
connect (21.5mmØ) -
supplied
L -
Condensate pipe - not supplied
M -
Condensate trap -
supplied
N -
Pressure relief (15mmØ)
O -
1” BSP
P -
Drain
R -
Fixing point for optional return oil pipe
WATER CONNECTIONS:
4
Remove the transit bungs from the pipework
connections on the boiler.
NOTE:
That surplus water may be present
due to factory testing.
4
Remove the central heating flow pipe (A)
from its packaging. Grease the flat washer
with the grease supplied and fit the pipe and
washer onto the isolation valve as shown.
4
Ensure all pipework is clean.
4
Align water pipework and connect, ensuring
that the expansion tank and control box fit
correctly before permanently connecting the
pipework.
4
Check that all unused sockets have been
capped.
OIL SUPPLY CONNECTIONS:
4
Route the oil supply pipe (W) along either side
of the boiler as required and connect to the
isolating valve (G) and ensure the valve is closed.
*NOTE:
Replace flexible hose at annual
service to prevent possible oil leakage.
4
Connect the flexible oil hose (H) to the
isolating valve (G).
CONDENSATE CONNECTION:
4
Connect 21.5mm polypropylene pipe (L) (not
supplied) to the condensate waste pipe
flexible push fit connector (K) and terminate to
waste.
4
Do not use any solvents, adhesives or
lubricants when pushing the pipe into the
rubber connector (K).
4
Ensure that the condensate pipe runs away
from the boiler at a constant fall of 50mm
(min.) for every metre.
4
Seal all condensate pipe joints.
4
Carefully pour 500ml of water into the
condensate collection (U) to fill condensate trap.
4
Check the water is running away and the
condensate pipework joints are water tight.
4
Check the flue manifold seal is undamaged
and seated correctly.
4
Refit flue manifold access cover (T) and
secure with screws (S).
IMPORTANT: The condensate trap must be
correctly filled to prevent the possibility of
potentially harmful flue products escaping
via the condensate pipework.
PRESSURE RELIEF CONNECTION:
4
Connect the pressure relief pipe (N) to a
copper discharge pipe (15mmØ min.).
CAUTION: ISOLATE THE OIL & WATER MAINS SUPPLY BEFORE STARTING ANY WORK
AND OBSERVE ALL RELEVANT SAFETY PRECAUTIONS.
PIPEWORK CONNECTIONS
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE 12/18-18/25-25/32
6 720 802 432 issue A 04/2012
27
IN
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