Page
10
of
56
RG66006951
‐
Rev.01
1.1.4
Product
innovation
LEW
units
provide
excellent
thermodynamic
performance
and
maximum
flexibility
of
use
thanks
to
constant
product
research.
The
joint
application
of
scroll
compressors,
advanced
control
systems
and
R410A
refrigerant
gas
achieves
compact
circuits
and
high
COPs.
The
possibility
of
keeping
the
evaporator
on
the
inside
allows
you
not
to
add
glycol
to
the
water
in
the
system,
with
clear
advantages
in
terms
of
thermodynamic
performance,
preservation
from
corrosion
and
respect
for
the
environment.
It
also
makes
it
possible
for
all
the
components
requiring
maintenance
to
be
installed
in
an
easily
accessible
space.
Chiller
units
can
be
applied
even
when
no
dissipation
source
other
than
air
is
available:
a
water
Dry
‐
Cooler
provides
thermal
exchange
with
the
atmosphere
while
maintaining
a
compact
‐
sized
circuit.
For
large
buildings,
air
‐
conditioning
can
be
implemented
as
the
floors/zones
are
sold
or
rented
by
installing
a
LEW
unit
for
each
floor
in
a
small
size
technical
room,
thus
spreading
the
investment
over
time.
The
overall
dimensions
of
the
units
(less
than
90
cm
depth
in
the
higher
output
sizes)
make
them
easy
to
be
installed
since
they
fit
through
any
door.
The
main
innovations
which
this
product
presents
are
summarised
in
the
following
list:
Option
of
using
water
without
glycol
in
the
utility
circuit
Heat
pump
mode
with
chiller
side
cycle
inversion
Option
of
even
heat
pump
versions
using
condensation
control
Electronically
controlled
electric
expansion
valve
High
COP
(Coefficient
of
performance)
of
thermodynamic
cycle
Reduced
refrigerant
load
Option
of
applying
chiller
mode
even
when
air
is
used
as
dissipation
source
It
occupies
less
space
on
the
floor
‐
plan
(specific
powers
up
to
153
kW/m
2
)
Innovative
aesthetic
features
and
full
safety
since
units
are
completely
closed
No
noise
on
the
outside,
less
noise
on
the
inside
due
to
dual
‐
soundproofing
in
low
‐
noise
versions.
1.2 Structure
All
LEW
series
units
have
the
load
bearing
base
and
panelling
in
galvanised
sheet
metal
painted
with
polyester
powders
and
polymerised
in
the
oven
at
180°C.
The
unit
has
an
attractive
design
and
when
closed
all
the
components
are
inaccessible.
This,
along
with
the
extensive
use
of
soundproofing
material
inside
the
compartment
and
around
the
compressors
(available
for
the
low
‐
noise
version),
reduces
sound
to
exceptionally
low
levels
(Lp
<
67
dB
‐
A
@1
metre
for
bigger
sizes).
The
hydraulic/chiller
connections
are
envisioned
on
the
right
side,
when
looking
at
the
electrical
control
board,
to
reduce
the
technical
space
required
for
installation.
All
the
panels
are
removable
(except
for
the
one
on
the
right,
upon
which
all
the
hydraulic
connections
are
fitted)
making
the
unit
fully
accessible
even
though
routine
maintenance
only
needs
accessing
from
the
front.
1.3 Cooling
circuit
The
cooling
circuit
is
manufactured
in
our
factory,
with
top
brand
components
and
operators
trained,
according
to
Directive
97/23,
on
all
the
brazing
operations.
The
range
can
be
configured
in
the
cooling
circuit
mode
(
Efficiency
Pack
)
which,
depending
on
the
size,
can
be
a
dual
compressor
on
a
double
circuit
(
Efficiency
Pack
1
)
for
a
highly
redundant
system,
dual
compressor
(tandem)
on
single
circuit
(
Efficiency
Pack
2
)
for
greater
efficiency
in
partial
loads,
three
compressors
(trio)
on
single
circuit
(
Efficiency
Pack
3
)
combining
economical
implementation
and
partial
load
efficiency
and
four
compressors
(two
tandems)
on
a
double
circuit
(
Efficiency
Pack
4
)
for
a
system
which
is
both
redundant
and
efficient
with
the
reduced
load.
Summary of Contents for LEW CD
Page 1: ...GB Technical manual LEW Reversible Chillers and Heat Pumps LEW SERIES 40 420 kW ...
Page 2: ...Page 2 of 56 RG66006951 Rev 01 ...
Page 17: ...Page 17 of 56 RG66006951 Rev 01 Reference table for numbering used in layouts ...
Page 31: ...Page 31 of 56 RG66006951 Rev 01 HF64000614 overall drawing ...
Page 32: ...Page 32 of 56 RG66006951 Rev 01 HF64000592 overall drawing ...
Page 33: ...Page 33 of 56 RG66006951 Rev 01 HF64000608 overall drawing ...
Page 34: ...Page 34 of 56 RG66006951 Rev 01 HF64000581 overall drawing ...
Page 35: ...Page 35 of 56 RG66006951 Rev 01 HF64000609 overall drawing ...
Page 36: ...Page 36 of 56 RG66006951 Rev 01 HF64001344 overall drawing ...
Page 37: ...Page 37 of 56 RG66006951 Rev 01 HF64000803 overall drawing ...
Page 38: ...Page 38 of 56 RG66006951 Rev 01 HF64000627 overall drawing ...
Page 47: ...Page 47 of 56 RG66006951 Rev 01 HF64000906 overall drawing ...
Page 48: ...Page 48 of 56 RG66006951 Rev 01 HF64000908 overall drawing for LEW C units ...
Page 49: ...Page 49 of 56 RG66006951 Rev 01 HF64000908 overall drawing for LEW D W H units ...
