18
-15
-10
-5
0
5
10
15
20
25
30
35
40
42
-5
0
5
10
15
18
-15
-10
-5
0
5
10
15
20
25
30
35
40
42
38
-6
-4
-2
0
2
4
6
8
10
12
14 15
8. OPERATIONAL
LIMITS
8.1. COOLING MODE FUNCTIONING
8.3. MOTORCONDENSING FUNCTIONING
The units, in standard configuration,
are not suitable for installation in salty
environments. Maximum and minimum
limits for water flow rates at the ex-
changer are indicated by the curves in
the pressure drop diagrams.
For functioning limits, please refer
to the below diagrams, values for
∆
t = 5°C.
NOTE:
In the cooling mode the unit can be
started up with ambient air at 46°C
and inlet water at 35°C
In the heating mode the unit can be
started up with ambient air at -15°C
and inlet water at 20°C
The unit can operate at these condi-
tions only for the time which is neces-
sary to achieve the right temperature
in the plant. To reduce this time it is
recommended to install a 3-way valve
that allows to bypass the water flow in
the plant until the achievement of the
conditions that allow the unit to work
within the proper operating limits
Ext
er
nal air t
em
per
atur
e d. b. °C
Temperature of the water produced °C
15
20
25
30
35
40
45
50
-15
-10
-5
0
5
10
15
20
25
30
35
40
8.2. HEATING MODE FUNCTIONING
External air temperature d. b. °C
Tem
per
atur
e of t
he wat
er pr
oduced °C
Ext
er
nal air t
em
per
atur
e d. b. °C
Evaporation temperature °C
Standard functioning
Functioning with glycol
Functioning with glycol with
DCPX accessory
Standard functioning with
DCPX accessory
KEY:
NOTE: As for the versions with buffer tank (09-10) the operating limits in cooling
and heating mode are 3°C lower
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