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11
engineer.
service
a
call
then
occur,
to
continues
has
supply
gas
the
that
Check
back.
and
anti-clockwise
temperature
boiler
the
turning
by
reset
be
LOCKOUT
TO LIGHT AND STOP THE
APPLIANCE
INDICATOR LIGHTS
Boiler demand :
Burner ON
Lock-out
TO LIGHT THE APPLIANCE
Check that the water valves to the central heating circuit are open.
Check that the needle on the pressure gauge is not below the
required pressure - sealed system only.
Switch on the mains electricity. Set the room thermostat, if
fitted, to maximum. Turn the boiler temperature control fully
clockwise to the maximum position. The burner will light. Set the
boiler temperature control and the room thermostat/cylinder
thermostat, if fitted, to the desired temperature.
TO STOP THE APPLIANCE
For Short Periods
Turn the boiler temperature control fully anti-clockwise to the
'O' position.
For Long Periods
Turn the boiler temperature control switch to the 'O' position.
Switch off the mains electricity.
Any programmer will require resetting if mains supply has been
disconnected.
ELECTRICITY SUPPLY
FAILURE
If the electricity supply fails the appliance will not operate.
Once the supply is restored the appliance will return to normal
operation.
Check that the settings of any programmer or time control
have been maintained.
10
condition
this
If
interrupted.
been
not
fully
control
can
appliance
The
APPLIANCE
System is calling for heat
:
Burner is firing
:
There is a fault condition
Steady light - Overheat
Flashing light - Flame failure
setting.
the
alter
not
Do
load.
installer
the
by
set
be
will
it
so
If
adjuster.
speed
which
pump
circulating
a
with
filled
be
will
system
PUMP
damaged.
to
wall
outside
the
on
fitted
terminal
flue
TERMINAL
BS5440.
with
accordance
in
ventilated
be
must
compartment
unvented
an
for
shown
than
less
6798:1987.
BS
in
non-combustible
perforated
a
by
space
boiler
is
space
airing
the
that
essential
is
It
6.
of
requirements
the
to
conforms
it
unless
for
compartment
the
use
not
do
compartment
the
If
appliance.
the
of
top
on
anything
place
damaged.
or
obstructed
become
to
wall
terminal
flue
the
allow
not
Do
obstructed.
be
in
openings
ventilation
cooling
Any
installed.
the
from
combustion
for
flow
air
require
not
do
APPLIANCES
FANNED
SEALED
ROOM
OF
valve.
a
by
controlled
be
must
sited
is
thermostat
room
in
located
radiator
The
BS2767.
of
requirements
they
then
system
the
to
fitted
are
valves
radiator
VALVES
RADIATOR
THERMOSTATIC
control.
the
with
supplied
instructions
manufacturer.
and
type
the
with
varies
the
system:
the
to
fitted
been
have
may
clock
PROGRAMMER/CLOCK
thermostat.
room
the
with
supplied
instructions
manufacture.
and
type
the
with
varies
thermostat
method
The
home.
the
of
room
one
in
located
heating
central
the
of
control
for
fitted
be
may
thermostat
THERMOSTAT
FROST PRECAUTIONS
If the appliance is not to be used for a long period of time and
there is a likelihood of freezing, then the appliance should be drained.
The Worcester Technical Helpline will advise you on suitable frost
precautions. The boiler has an in-built frost thermostat which will
protect the appliance should the temperature of the boiler drop below
approximately 10°C.
SERVICE
Annual servicing is important in order to ensure continuing
high efficiency and long life for your appliance. In the event of any
difficulty in making suitable servicing arrangements, Worcester
personnel or other competent persons will discuss regular servicing
arrangements and offer a comprehensive maintenance contract.
WARNING
If a gas leak exists, or is suspected, turn off the gas supply to the
appliance at the service cock on the meter and consult your local
service engineer.
Do not touch any electrical switches to turn them either on or off.
Open all windows and doors. Do not smoke. Extinguish all naked lights.
CLEANING
Do not use abrasive cleaners on the outer casing. Use a damp
cloth and a little detergent.
heating
the
suit
to
a
with
fitted
be
may
heating
The
CIRCULATING
or
obstructed
become
the
allow
not
Do
FLUE
compartment
the
then
are
clearances
the
If
described
as
partition
the
from
separated
Section
6798:1987:
BS
purposes
storage
a
in
fitted
is
appliance
not
Do
NOTE:
outside
the
on
fitted
not
must
door
or
wall
a
are
they
which
in
room
appliances
These
(RSF)
FLUE
VENTILATION
radiator
thermostatic
the
where
room
the
the
to
conform
must
thermostatic
If
the
to
Refer
setting
of
method
or
programmer
A
the
to
Refer
room
a
setting
of
be
will
It
temperature.
room
A
ROOM
6
7
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