9
and
the
on
board
sensors
continuously
monitor
and
adapt
the
performance
of
the
inverter
compressor,
of
the
pump
and
of
the
conditions
requested
by
the
user.
All
internal
units
are
standard
supplied
with
the
following
monitoring
and
protection
devices:
return
water
temperature
sensor
installed
at
the
return
water
pipe
line
from
the
plant,
operating
and
antifreeze
sensor
installed
at
the
outlet
pipe
of
the
water
to
the
plant
and
on
water
side
a
water
flow
switch
is
installed
to
protect
the
evaporator.
All
internal
units
are
supplied
with
high
pressure
transducer,
low
pressure
transducer,
compressor’s
inlet
and
outlet
temperature
sensors,
compressors
thermal
protection
device,
fans
thermal
protection
device,
high
pressure
flow
switch.
4.10
HYDRAULIC
CIRCUIT
water
utilization
and
directly
run
by
the
microprocessor
that
controls
the
related
start
up
and
proper
running.
The
hydraulic
circuit
also
includes:
expansion
vessel,
safety
valve
(3
bar)
and
the
automatic
air
release
valve.
4.11
FAN
SPEED
CONTROLLER
This
device
is
required
with
the
unit
running
in
cooling
mode
when
the
outside
air
temperature
is
below
20°C,
thus
reducing
the
air
flow
rate
of
the
condensor
and
adapting
the
evaporating
pressure
in
order
to
allow
proper
running
of
the
unit.
This
device
can
also
be
used
to
reduce
the
noise
level
of
the
unit
when
the
outside
air
temperature
decreases
(e.g.
during
night
operation
period).
5
AVAILABLE
VERSIONS
pump,
flow
switch,
automatic
air
release
valve
load/unload
valve).
5.1
ACCESSORIES
AG
–
Anti
‐
vibration
rubber
pad
to
be
installed
in
the
chassis
of
the
unit
for
possible
shock
absorption.
KAS
‐
antifreezing
kit
(this
accessory
have
to
be
required
when
the
order
is
placed
and
have
to
be
factory
installed).
It
is
made
up
of
an
auto
‐
heating
cable
thermostated
at
5°C
and
wrapped
around
the
base
of
the
unit
near
the
condensing
coil.
6
INSTALLATION
WARNING:
All
the
operation
described
in
next
chapters
MUST
BE
DONE
BY
TRAINED
PEOPLE
ONLY.
Before
any
operation
on
the
unit,
be
sure
that
the
electric
supply
is
disconnected.
6.1
GENERALITY
When
installing
or
servicing
the
unit,
it
is
necessary
to
strictly
follow
the
rules
listed
in
this
manual,
to
conform
to
all
the
specifications
of
the
labels
on
the
unit,
and
to
take
any
possible
precautions.
Not
observing
the
rules
reported
on
this
manual
can
fan
(2
fans
as
for
the
PACK
DUE
16
models)
according
to
the
value
of
cooling
power
at
any
working
The
PACK DUE
INVERTER
system
firm
reduces
the
plant’s
water
content
to
the
minimum,
that
is
from
the
usual
value
of
cooling
12
‐
15
l/kW
to
10
liters
(as
for
the
PACK DUE
7
and
PACK DUE
9
model
types)
or
to
16
liters
(as
for
the
model
PACK DUE
12)
or
to
20
liters
(as
for
the
model
PACK DUE
16),
IN
ABSOLUTE,
as
for
the
PACK DUE
units.
Because
of
the
appliance’s
reduced
size,
the
installation
space,
heat
loss
and
installation
costs.
4.9
MONITORING
AND
PROTECTION
DEVICES
reduced
water
content,
the
PACK DUE
units
can
be
installed
in
plants
without
water
tank
with
advantages
in
terms
of
the
DUE
12
and
PACK
up
to
a
value
of
10
liters
(as
for
the
models
PACK DUE
7
and
PACK DUE
9),
or
of
16
liters
(as
for
the
model
absolute
value
and
not
to
any
kW
of
installed
power.
CAUTION:
Having
a
fixed
∆
T(°C),
the
INVERTER
control
system
is
able
to
manage
plant’s
minimum
water
contents
PACK DUE
12),
and
of
20
liters
(as
for
the
model
PACK DUE
16).
This
value
makes
reference
to
the
liters’
The
PACK DUE
chillers
units
are
supplied
with
an
integrated
hydraulic
circuit
including
the
circulating
pump,
suitable
for
chilled
PACK.DUE
‐
reversible
heat
pump
with
integrated
hydronic
system
(expansion
vessel,
safety
valve,
pressure
gauge,
circulating
any
eventual
damage
has
to
be
questioned
to
the
carrier
and
recorded
on
the
Delivery
Note
before
signing
it.
A2B ACCORRONI
severe
damage.
create
dangerous
situations.
After
receiving
the
unit,
immediately
check
its
integrity.
The
unit
left
the
factory
in
perfect
condition;
E.G. to
be
informed,
within
8
days,
of
the
extent
of
the
damage.
The
customer
should
prepare
a
written
statement
of
any
Summary of Contents for PACK DUE 12
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Page 40: ...39 22 2 2 Wiring diagram of PACK DUE 12...
Page 41: ...40 22 2 3 Wiring diagram of PACK DUE 16...
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