i
‐
SHWAK
V4
Inverter
air/water
chillers
and
heat
pumps
with
floor
‐
standing
and
remote
condensing
units
49
21.3 Hot water production (winter operation)
Once
the
system
is
working
at
the
right
temperature,
the
inlet
hot
water
temperature
should
not
to
be
lower
than
25°C;
the
lowest
values
that
are
not
related
to
transitional
or
start
‐
up
stages
may
cause
incorrect
working
operation
to
the
system
with
the
possible
breakdown
of
the
compressor.
The
maximum
outlet
water
temperature
should
not
exceed
58°C.
At
this
temperature,
the
power
consumption
and
the
performances
in
terms
of
COP
are
enhanced
when
the
outdoor
temperature
is
higher
than
5°C,
even
if
the
unit
is
still
able
to
work
up
to
the
limit
reported
in
the
envelope.
For
higher
temperatures
than
those
pointed
out,
especially
if
have
a
concomitant
with
the
reduction
of
the
water
flow
rate,
it
may
cause
abnormalities
to
the
normal
operating
of
the
unit,
or
the
safety
devices
act
in
critical
cases.
21.4 Ambient air temperature
The
units
are
designed
and
manufactured
to
operate,
in
summer
operation,
with
the
condensate
control,
with
outdoor
air
temperatures
ranging
between
‐
10°C
and
46°C.
While
operating
as
a
heat
pump,
the
admitted
outdoor
air
temperatures
range
changes
from
‐
20°C
to
40°C
depending
on
the
water
outlet
temperature
as
indicated
in
the
below
table.
Operation
limits
Water
chiller
mode
Ambient
temperature
Minimum
‐
10°C
Maximum
+46°C
Water
outlet
temperature
Minimum
+5°C
Maximum
+25°C
Heat
pump
mode
Ambient
temperature
Minimum
‐
20°C
Maximum
+30°C
Water
outlet
temperature
Minimum
+25°C
Maximum
+58°C*/+63°C**
Heat
pump
mode
for
sanitary
hot
water
Ambient
temperature
with
maximum
water
temp.
38°C
Minimum
‐
20°C
Maximum
+40°C
Ambient
temperature
with
maximum
water
temp.
55°C
Minimum
‐
15°C
Maximum
+35°C
Water
outlet
temperature
Minimum
+20°C
Maximum
+58°C*/63°C**
(*)
The
setting
of
the
unit
is
57°C,
the
value
of
the
maximum
temperature
takes
into
account
the
hysteresis
of
1°C
present
on
the
parameter.
(**)
With
a
supplementary
electric
heater
(optional)
Herein
below
are
reported
the
graphics
operating
limits
during
the
air
conditioning
and
domestic
hot
water
production
modes.
CHILLER/HEAT
PUMP
MODE
