i
‐
SHWAK
V4
Inverter
air/water
chillers
and
heat
pumps
with
floor
‐
standing
and
remote
condensing
units
10
6.5
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
CE
EN
60335
‐
2
‐
80
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
brushless
DC
type
with
8
poles
(about
200/1000
rpm).
The
motors
are
directly
driven
with
an
integrated
thermal
overload
protection.
The
protection
class
of
the
motors
is
IP44.
6.6
USER
HEAT
EXCHANGERS
The
user
‐
exchangers
are
made
up
of
AISI
304
stainless
steel
braze
‐
welded
plates
type.
The
user
heat
exchangers
are
factory
insulated
with
flexible
close
cell
material.
Each
evaporator
is
provided
with
a
temperature
sensor
working
as
antifreeze
protection
that
activates
the
circulator,
even
in
the
case
when
the
unit
is
turned
off
when
the
condition
parameters
set
in
the
controller
have
been
occurred.
6.7
ELECTRIC
BOX
The
electric
box
is
manufactured
according
to
according
current
European
Union
laws.
The
accessibility
to
the
electric
board
is
possible
after
removing
the
side
and
top
panels
of
the
outdoor
unit
by
using
an
appropriate
tool,
and
by
removing
the
ABS
plastic
cover
for
the
indoor
units.
The
protection
degree
is
IP24.
The
outdoor
unit
terminal
board
is
supplied
with
voltage
free
contacts
for
general
alarm.
6.8
CONTROL
SYSTEM
The
i
‐
SHWAK
V4
units
are
all
equipped
with
a
microprocessor
adopting
an
overheating
control
logic
program
through
the
electronic
thermostatic
valve
managed
by
the
pressure
transducers
signals
and
temperature
sensor.
The
microprocessor
can
manage
also
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
and
the
on
board
sensors
continuously
monitor
and
adapt
the
performance
of
the
inverter
compressor,
and
of
the
fan
(2
fans
as
for
the
i
‐
SHWAK
V4
14,
14T,
16
and
i
‐
SHWAK
V4
16T
models).
6.9
MONITORING
AND
PROTECTION
DEVICES
The
internal
units
are
all
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.
The
internal
units
are
all
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
switch
HP.
6.10
HYDRAULIC
CIRCUIT
The
i
‐
SHWAK
V4
outdoor
units
are
supplied
with
an
integrated
hydraulic
circuit
including
a
high
efficiency
(EEI≤0,23
for
the
sizes
of
V4
14,
16,
10
and
12,
EEI≤0,21
for
V4
06,
08)
modulating
BRUSHLESS
circulator,
suitable
also
for
chilled
water
utilization
and
is
directly
managed
by
the
controller
on
board
the
unit,
Y
filter
Y
with
integrated
faucet,
plate
heat
exchanger,
flow
switch
for
protection,
3
‐
way
valve
for
commutation
between
plant
side
and
DHW
technical
side,
expansion
vessel
of
8
litres
plant
circuit
side
(standard
in
MARP/MARPS
models
and
optional
in
MAR/MARS
models
where
the
volume
is
depending
on
the
installed
optional
kits,
optional
for
MAR
model
without
electric
heater
kit
and/or
boiler),
expansion
vessel
on
plant
side,
the
automatic
air
release
valve
and
relief
valve
(3
bar)
to
be
connected
to
the
collecting
system.
6.11
FAN
SPEED
CONTROLLER
This
type
of
control
is
managed
by
the
microprocessor
and
is
necessary
for
optimizing
the
pressure
of
evaporation/condensation
during
summer/winter
operation
in
order
to
allow
proper
running
of
the
unit.
