Page
53
of
56
RG66006951
‐
Rev.01
The
machines'
performance
can
be
calculated
with
the
selection
software.
5.1 Working
limits
‐
Heat
transfer
fluid:
water
or
mixture
of
water
and
max
30%
glycol
antifreeze
‐
Maximum
water
side
pressure:
=
3
bar
‐
Maximum
pressure
on
high
pressure
side
=
45
bar
‐
r
(**)
‐
Maximum
ambient
T
=
45
°C
‐
Minimum
ambient
T=
‐
10
°C
‐
Maximum
pressure
on
low
pressure
side
=
29
bar
‐
r
(*)
‐
Power
supply
voltage:
=
+/
‐
10%
compared
to
plate
voltage
‐
Maximum
storage
T
=
+
50
°C
‐
Minimum
storage
Temp
=
‐
20
°C
(limit
set
by
on
‐
board
electronics)
(*)
this
value
can
only
be
reached
during
storage
and
determines
the
saturation
pressure
of
30
bar
‐
r
of
the
refrigerant
on
the
low
pressure
side
of
the
circuit
(value
which
determines
its
limits).
(**)
for
units
with
power
outputs
higher
than
140
kW
per
circuit,
a
second
pressure
switch
sets
the
threshold
to
40.5
bar.
5.2
Water flow to evaporator
The
nominal
flow
rate
is
based
on
a
temperature
differential
of
5°
C
between
inlet
and
outlet
water,
in
relation
to
the
cooling
capacity
provided
at
the
nominal
water
(12/7
°C)
temperatures.
The
maximum
allowable
flow
rate
is
associated
with
a
temperature
differential
of
3
°C.
Higher
flow
rates
cause
unacceptable
drops
in
pressure.
The
minimum
allowable
flow
rate
is
achieved
with
a
temperature
differential
of
8
°C.
Lower
flow
rates
may
result
in
low
evaporation
temperatures,
which
could
trigger
the
safety
devices
and
stop
the
unit.
They
may
also
cause
an
incorrect
distribution
or
heat
transfer
in
a
non
‐
turbulent
or
not
fully
turbulent
flow.
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 ...
