IK-E322-001GB
7
_____________________________________________________________________________
7
MAINTENANCE
INSTRUCTIONS
In
case
of
dust
accumulation
inside
the
measuring
chamber,
which
may
be
a
result
of
a
long
‐
term
device,
the
detector
sensitivity
level
will
increase
up
to
evoking
false
alarms.
It
is
recommended
to
clean
the
optical
module
(i.e.
the
labyrinth
and
lenses
of
both
transmitting
diode
and
receiving
photodiode
which
are
placed
within
the
labyrinth)
every
year.
In
order
to
carry
the
cleaning
process
out,
it
is
necessary:
−
remove
the
detector
from
its
base
turning
it
counter
clockwise
and
taking
it
off;
−
disconnect
the
connector
(11);
−
remove
two
screws
(10)
fastening
the
bottom
(9)
to
the
casing
(6)
of
the
detector;
−
take
the
casing
off;
−
bend
softly
the
catches
that
hold
the
labyrinth
(5)
and
take
it
out;
−
using
soft
brush
clean
carefully
the
labyrinth,
the
hollows
where
the
diodes
are
placed
as
well
as
the
metal
cover
from
the
side
of
the
labyrinth;
−
in
case
such
cleaning
is
not
effective,
it
is
allowed
to
wash
the
labyrinth
with
warm
water
with
an
addition
of
washing
‐
up
liquid;
−
after
cleaning
and
drying
no
water
stain
may
be
left
on
the
labyrinth
internal
surfaces.
After
cleaning
reassemble
the
detector
in
the
following
order:
−
check
whether
the
metal
cover
does
not
conceal
the
acoustic
signalling
device
opening;
−
press
the
labyrinth
down
until
its
catches
snap;
in
this
position
the
printed
circuit
board
should
closely
adhere
the
bottom
edges,
the
labyrinth
should
be
tightly
fastened
in
upright
position
(with
no
bending);
−
place
the
module
into
the
casing
so
that
the
LED
and
the
testing
button
poke
out
above
the
casing
surface;
−
fasten
the
module
to
the
casing
with
two
screws;
−
connect
a
battery
and
check
the
detector
operation;
−
install
the
detector
inside
the
base.
8
NOTES
A
supplying
battery
is
not
included
in
a
standard
detector
package
–
it
should
be
ordered
separately.
The
ADR
‐
20N
detectors
do
not
contain
any
radioactive
material.
It
should
be
avoided
to
install
the
detectors
in
draughty
places.
They
should
not
be
mounted
above
stoves,
kettles
and
similar
places
where
smoke
or
water
vapour
may
occur.
IK
‐
E289
‐
003GB/10.2008/12.2011
