TDP074e.doc
Rev.
28.11.2016
Page
21
/
29
Perrot
REGNERBAU
CALW
GmbH
Industriestraße
19
‐
29
/
D
‐
75382
Althengstett
/
Germany
Tel.:
+49
‐
7051
‐
162
‐
0
/
Fax:
+49
‐
7051
‐
162
–
133
E
‐
mail:
/
Construction
team
e
‐
mail:
7.
Decommissioning
and
preparing
for
winter
For
decommissioning
please
turn
off
the
water
supply
and
electricity
supply
of
the
pump.
7.1
Preparing
for
winter
During
times
of
possible
frost
please
ensure
that
there
is
no
standing
water
in
the
sprinkler.
The
VP3
sprinkler
has
an
automatic
emptying
system.
The
sprinkler
has
a
discharge
valve
and
can
thus
be
emptied
by
gravity.
To
do
this,
the
water
is
let
out
at
the
deepest
point
of
the
main
pipe,
as
a
result
of
which
the
sprinkler
empties
itself.
(Deep
point
emptying)
The
remaining
water
in
the
piston
drive
causes
no
damage
in
the
event
of
freezing.
If
the
sprinkler
is
taken
back
into
use
despite
there
still
being
ice
in
the
piston
chamber,
then,
at
an
ice
temperature
of
approx.
–
20°C,
it
will
take
around
15
minutes
until
the
drive
is
thawed
out.
Electrically
activate
the
solenoid
several
times
so
that
any
residual
water
is
pushed
out
of
the
coil
cavity.
During
the
winter
we
recommend
activating
the
coil
for
approx.
1
minute
twice
a
week.
7.2
Springtime
commissioning
As
a
result
of
the
change
of
load
and
diverse
installation
conditions
(damp/dry),
the
head
of
the
piston
sprinkler
is
subjected
to
extreme
tensions.
These
circumstances
can
lead
to
the
piston
acquiring
some
axial
play.
In
order
to
avoid
any
operating
problems,
the
piston
drive
cover
should
be
tightened
as
described
below
during
spring
commissioning
in
the
first
and
second
year
of
operation.
Before
the
grey
cover
can
be
tightened,
the
lock
screw
needs
to
be
removed.
After
firmly
tightening
the
grey
cover,
twist
in
the
lock
screw
again.
The
lock
screw
prevents
the
grey
cover
from
working
itself
loose.