8
4
TECHNICAL
CHARACTERISTICS
units
are
extremely
versatile
and
can
operate
in
heat
pump
mode
with
the
ability
of
producing
hot
water
at
a
temperature
of
55°C
for
environmental
heating
and
sanitary
applications.
The
INVERTER
compressor
with
brushless
DC
motor
technology,
matched
with
electronic
expansion
valve,
pump
and
variable
speed
blower
are
generally
used
for
optimizing
the
power
consumption
and
efficient
operation
of
the
refrigerating
components.
4.1
FRAME
ensure
the
best
resistance
against
atmospheric
agents.
The
frame
is
self
‐
supporting
with
removable
panels.
All
screws
and
rivets
for
outdoor
installations
are
in
stainless
steel.
4.2
REFRIGERANT
CIRCUIT
The
refrigerant
gas
used
in
these
units
is
R410A.
The
refrigerant
circuit
has
been
manufactured
by
means
of
international
primary
brands
components
and
according
to
the
UNI
EN
13134
rule
concerning
welding
procedures.
The
refrigerant
circuit
includes:
Safety
device
on
the
gas
side,
4
way
reverse
cycle
valve,
electronic
expansion
valve,
liquid
receiver,
valves
for
maintenance
and
control,
pressure
safety
device
according
to
PED
regulation
(high
pressure
switch),
pressure
transducers
to
accurately
adjust
the
evaporating
and
condensing
pressures,
filters
for
throttling
valve
to
avoid
its
clogging.
4.3
COMPRESSORS
used
with
R410
refrigerant.
The
compressors
are
all
supplied
with
crankcase
heater
and
thermal
overload
protection.
They
are
mounted
on
a
rubber
material
acting
as
a
shock
absorbers.
The
compressors
are
mounted
in
a
separate
chamber
in
order
to
be
separated
from
the
air
stream
to
reduce
the
noise.
The
crankcase
heater
is
always
powered
when
the
compressor
is
in
stand
‐
by.
The
inspection
is
possible
through
the
frontal
panel
of
the
unit
that
allow
the
maintenance
of
the
compressors
even
if
the
unit
is
working.
4.4
AIR
SIDE
EXCHANGERS
The
air
side
exchangers
are
made
up
of
copper
pipes
and
aluminium
fins.
The
diameter
of
the
copper
pipes
is
3/8”
(except
for
the
tubes
are
mechanically
expanded
into
the
aluminium
fins
to
improve
the
heat
exchange
factor.
The
geometry
of
these
condensers
guarantee
a
low
air
side
pressure
drop
and
then
aerofoil
blades.
They
are
statically
and
dynamically
balanced
and
supplied
complete
of
the
safety
fan
guard
according
to
the
EN
60335
Rule.
They
are
mounted
on
the
unit
frame
by
interposition
of
rubber
vibration
dampers.
The
electric
motors
are
all
at
6
poles
(about
800/900
rpm).
The
motors
are
directly
driven
with
an
integrated
thermal
overload
protection.
The
protection
class
of
the
motors
is
IP
54.
4.5
FANS
The
fans
are
axial
type
with
aluminium
aerofoil
blades.
They
are
statically
and
dynamically
balanced
and
supplied
complete
of
the
safety
fan
guard
according
to
the
EN
60335
rule
(safety
for
electrical
apparatus
of
domestic
and
similar
use).
They
are
mounted
on
the
unit
frame
by
interposition
of
rubber
vibration
dampers.
The
electric
motors
are
all
at
6
poles
(about
800/900
rpm).
The
motors
are
directly
driven
with
an
integrated
thermal
overload
protection.
The
protection
class
of
the
motors
is
IP
54.
4.6
USER
HEAT
EXCHANGERS
The
user
heat
exchangers
are
made
up
of
AISI
316
stainless
steel
braze
‐
welded
plates
type.
The
use
of
these
kind
of
heat
exchangers
allows
a
massive
reduction
of
the
refrigerant
charge
of
the
unit
compared
to
the
traditional
shell
‐
in
‐
tube
evaporators
and
also
a
reduction
of
the
overall
dimensions
of
the
unit.
The
user
heat
exchangers
are
factory
insulated
with
flexible
close
cell
material.
Each
heat
exchanger
is
provided
with
a
temperature
sensor
working
as
antifreeze
protection.
4.7
ELECTRIC
BOX
The
electric
box
is
manufactured
according
to
current
European
Union
laws.
The
accessibility
to
the
board
is
possible
after
removing
the
front
panel
of
the
unit.
The
protection
degree
is
IP55.
The
outdoor
unit
terminal
board
is
supplied
with
voltage
free
contacts
for
general
alarm,
outdoor
temperature
sensor
(when
expected).
The
indoor
unit
terminal
board
is
supplied
with
sanitary
water
temperature
sensor
and
handling
of
3
‐
way
valve.
4.8
MICROPROCESSORS
electronic
expansion
valve
which
is
driven
by
the
pressure
transducers
signals.
The
microprocessor
is
also
capable
of
controlling
the
following
functions:
water
temperature
regulation,
antifreeze
protection,
compressor’s
time
setting,
compressor
automatic
starting
sequence,
alarm
reset,
alarm
management
and
operating
LED.
The
control
system
together
with
the
INVERTER
technology
The
PACK DUE
water
chillers
and
heat
pumps
series
are
designed
for
applications
in
residential
and
commercial
areas,
These
All
PACK DUE
units
are
made
up
of
hot
‐
galvanised
thick
sheet
metal,
painted
with
polyurethane
powder
enamels
at
180°C
to
The
used
DC
inverter
compressors
are
a
rotary
hermetic
single
‐
phase
type
(only
for
the
models
PACK DUE
7
and
PACK DUE
9)
and
twin
rotary
single
‐
phase
(for
the
model
PACK DUE
12),
and
scroll
3
‐
phases
type
(for
PACK DUE
16)
designed
to
be
model
PACK DUE
7
in
which
the
diameter
of
the
copper
pipes
is
5/16”)
and
the
thickness
of
the
aluminium
fins
is
0,1mm.
The
All
PACK DUE
units
are
standard
supplied
with
a
microprocessor
adopting
an
overheating
control
logic
program
through
the
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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