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SEALED
WATER
SYSTEM
The
Worcester
350
is
designed
to
operate
on
a sealed system
only.
To
ensure that the appliance operates
correctly
a
minimum
water operating pressure must
be
maintained.
The
minimum
pressure
required
for
your appliance
is
indicated
by
the
green
needle
on
the pressure
gauge,
which
is
located
on
the
facia
panel.
If the pressure
falls
below this
level
to the minimum the red
indicator
light
on
the
facia
panel
will
light.
In
the event that the
red
light
operates, the system must
be
re·
pressurised
using
the method described
by
your
installer.
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CLEARANCES
Your
Installer
will
have
provided
space around the appliance
for
safety
and
servicing.
It
is
important that
you
do
not restrict this
space.
The
minimum
clearances
are:
Left-hand
side
Right-hand
side
Top
Below
In
front
5mm.
5mm.
35mm.
200mm.
600mm.
If
the
flue
is
connected to the side
of
the appliance then a
clearance
of
25
mm
is
required
at that
side.
Fig. 1.
To
ensure
that
the boiler and system are
full
of
water and
pressurised, check the white pressure needle
on
the pressure
gauge. Contact your installer
or
maintenance engineer
if
the
system continues
to
lose
pressure
as
this
may
indicate
a
leak.
CENTRAL
HEATING
SYSTEM
During
the
first
operation
of
the heating system,
check
that
all
radiators
are
heated
evenly.
If
the
top
of
the radiator
is
at a
lower
temperature than the bottom, then vent
it
by
releasing air
through the vent
screw
at the top
of
each
radiator.
Please
refer
to
the
preceding
paragraph
as
excessive
venting
may
cause a
drop
in
system pressure.
FLUE
OPERATION
In
cold
weather,
vapour
may
be
emitted
from
the
flue.
This
is
a
normal operating characteristic and
no
remedial action
is
necessary.
VENTILATION
This
is
a room sealed appliance and ventilation openings
provided
by
the installer
in
a
wall
or
door
must not
be
blocked.
The
flue
terminal
in
the outside
wall
must not
be
obstructed
or
damaged.
Do
not place any combustible matP.rial
nn
nr arnund the
appliance.
CUPBOARD
INSTALLATION
If
the appliance
is
fitted
in
a cupboard
and
the cupboard
is
to
be
used
for
storage, as
in
an
airing
cupboard
for
clothes, the
airing
space must
be
separated
from
the boiler and
flue
so
that
no
combustible material
may
come
into
contact
with
the appliance
or
the
flue,
or
restrict
any
permanent
air
vent
which
may
have
been
installed.
Please
consult your
Gas
Region
or
Worcester
Heat
Systems
Ltd.
for
advice should you wish
to
fit
a compartment around the
appliance after installation.
tL-f---
Overheat
Thermostat
Reset
Button
Sightglass
(behind
front
panel)
J J
Indicator
Lights
,
....
\ ,
......
\
'-~' '-~'
Amber-
Standby
Green
-
Demand
1-----------:-ld
Red-
Low
System
Pressure
I
,.,,
, I
"r~·~~~
8
""""j"
1
Central
Heating
Temperature
Control
l
"'""":::
9_j
t·.0.'
01--
Central
Heating
System
Pressure
Gauge
~~!.,_-~==.t=~==~:}--
Operating
Switch
(or
programmer)
L__
Gas
Service
Cock
2


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