CALIDO
Sanitary
water
heat
pump
20
9.7
HYDRAULIC
CONNECTIONS
The
hydraulic
connections
have
to
be
done
in
accordance
with
national
and
local
regulations.
Pipes
can
be
made
up
of
multilayer
pipe,
polyethylene
or
stainless
steel
and
must
withstand
at
least
100°C
and
10
bar.
Pipes
have
to
be
designed
depending
on
the
desired
water
flow
and
on
the
hydraulic
pressure
drops
of
the
system.
All
pipes
have
to
be
insulated
with
closed
‐
cell
material
of
adequate
thickness.
Units
should
be
connected
to
piping
by
means
of
flexible
joints.
Piping
should
include:
Y
‐
shaped
metallic
filter
(to
be
mounted
on
the
inlet
pipe)
with
a
mesh
not
larger
than
1mm.
Automatic
charging
group
(3
bar
advised)
when
water
supply
pressure
is
higher
than
5,5
bar.
Hydraulic
safety
group
(8
bar).
Manual
gate
valves
to
separate
the
unit
from
the
hydraulic
circuit.
Manual
gate
valve
on
the
inlet
pipe
to
discharge
the
unit
if
necessary.
Thermometers
for
wells
to
monitor
the
system’s
temperature.
Expansion
tanks,
safety
valves
and
air
vents
where
indicated
in
the
following
installation
diagrams.
Perform
the
connections
making
sure
that
weight
of
the
pipes
do
not
overload
the
unit.
Check
the
water
hardness,
which
should
not
be
below
12°f.
With
particularly
hard
water,
it’s
recommended
the
use
of
a
water
softener
so
that
the
residual
hardness
is
no
more
than
20°f
and
no
less
than
15°f.
WARNING:
When
it’s
possible,
connect
the
pipes
to
the
hydraulic
connections
always
using
the
system
key
against
key.
WARNING:
Unit
water
inlet
pipe
have
to
be
in
correspondence
with
the
blue
connection,
otherwise
the
unit
malfunction
could
occur.
WARNING:
It
is
compulsory
to
install
on
the
WATER
INLET
connection
a
metallic
filter
with
a
mesh
not
larger
than
1
mm.
Should
the
filter
not
be
installed,
the
warranty
will
no
longer
be
valid.
The
filter
have
to
be
kept
clean,
so
make
sure
that
it
is
clean
after
the
unit
has
been
installed,
and
then
check
it
periodically.
Perform
the
drainage/piping
work
according
to
the
installation
instruction.
If
there
is
a
defect
in
the
drainage/piping
work,
water
could
leak
from
the
unit
and
household
goods
could
get
wet
and
be
damaged.
The
hot
water
needs
to
mix
with
cold
water
for
terminal
usage,
too
hot
water
(over
50°C)
in
the
heating
unit
may
cause
injury.
It’s
recommended
the
use
of
anti
‐
scald
valves.
The
diagrams
are
to
be
considered
only
for
indication
purpose.
It
is
always
required
the
study
of
the
specific
installation
context
and
the
approval
of
the
system
by
a
qualified
heating
engineer
designer.
9.7.1
Water
connections
Please
pay
attention
to
the
below
points
when
connecting
the
water
loop
pipe:
1)
Try
to
reduce
the
water
loop
resistance.
2)
Make
sure
that
there
is
nothing
in
the
pipe
and
the
water
loop
is
smooth,
check
the
pipe
carefully
to
see
if
there
is
any
leak,
and
then
pack
the
pipe
with
the
insulation.
3)
Install
the
hydraulic
safety
group
in
the
water
inlet.
4)
Install
also
an
expansion
tank
suitably
sized
to
absorbe
volume
variations.
5)
The
nominal
pipe
diametere
must
be
selected
on
the
basis
of
the
available
water
pressure
and
the
expected
pressure
drop
within
the
piping
system.
6)
The
water
pipes
may
be
of
the
flexible
type.
To
prevent
corrosion
damage,
make
sure
that
the
materials
used
in
the
piping
system
are
compatible.
7)
During
the
installation
of
the
pipes
in
situ,
any
contamination
of
the
piping
system
must
be
avoided.
9.7.2
Water
loading
If
the
unit
is
used
for
the
first
time
or
used
again
after
emptying
the
tank,
please
make
sure
that
the
tank
is
full
of
water
before
turning
on
the
power.
1)
Proceed
to
thoroughly
clean
the
system
2)
Open
the
cold
water
inlet
and
hot
water
outlet.
3)
Start
the
water
loading.
When
there
is
water
normally
flowing
out
from
the
hot
water
outlet,
the
tank
is
full.
4)
Turn
off
the
hot
water
outlet
valve
and
water
loading
is
finished.
ATTENTION:
Operation
without
water
in
water
tank
may
result
in
damage
of
auxiliary
E
‐
heater.
Summary of Contents for CALIDO 110
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