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~ORCESTER
INSTALLATION
&
SERVICING
INSTRUCTIONS
FOR
WORCESTER
BOSCH
GREENSTAR
25CDV30CDV37CDci42CD•
6
720
613
700a
(2006/11)
Bosch
Group
FILLING
THE
SYSTEM
Ensure all system
and
boiler drain points are
closed.
2 Remove the
bottom
panel (if fitted).
3 Ensure that the
white
plastic control
screw
(C) on the charging link is turned fully into
its
closed position.
4
Open
the isolating valves on both the
DHW
inlet and
CH
return connections.
5 Insert the charging key (D) (situated
in
its
storage position (E) on the
bottom
cover
of
the boiler) initially aligning the
arrow
on the
key with the
"unlock" symbol on the charg-
ing link body. Ensure that the key is inserted
fully and turn to the "lock" position.
Check
that the key is secure.
6
To
fill the system from the
DHW
inlet turn
the
white
plastic control
screw
(C) on the
charging
link
to
the fully
out
position.
7
Once
the system has been filled
to
a pres-
sure
of
1 bar turn the
white
control
screw
(C)
to
its closed position.
8 Vent all radiators, retighten
when
completed
and
check
the system and
correct
any leaks.
•
The boiler integral expansion vessel is
precharged
to
0.75 bar (equal
to
a static
head
of
7.5
meters [22 ft]). A
Schraeder
type valve is fitted
to
the expansion vessel
to
allow
for pressure adjustment if required.
• If
an
extra expansion vessel is fitted
to
the
central heating return, adjust
to
the
same
pressure
as
the appliance internal expan-
sion tank, refer
to
separate instructions with
the extra expansion vessel.
9 Briefly open the pressure relief valve
to
test
its operation.
10 Refill the system
up
to
1 bar.
Turn
the
white
control
screw
(C) to its
closed
position
and
then remove the charging key by turning
back
to
its "unlock" position and
withdraw-
ing.
11
Place the charging key (D)
in
its storage
position (E) on the
bottom
cover
of
the boil-
er.
GAS
SUPPLY
~
Open
gas
cock
on the boiler and
purge
the
gas
supply
to the boiler ensuring that the
room is
well ventilated.
~
Test gas
supply
for soundness as
described
in
BS
6891.
FILLING
THE
SYSTEM
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