21
NRL 028-075 60Hz
EN
9. OPERATION LIMIT
9.1. COOLING MODE
¹
9.2. HEATING MODE
¹
External air temperature b.s.
Temper
atur
e of the w
at
er
pr
oduced C
ONDENSER
The units, in standard configuration, are not suitable
for installation in salty environments. For functioning li-
mits, please refer to the diagrams below, valid for AHRI
standard conditions.
Wind breaks should be implemented if the unit is
installed in particularly windy areas, to prevent a
malfunction of the unit.
Ex
ternal air t
emper
atur
e b.s.
Temperature of the water produced EVAPORATOR
5
14
23
32
41
50
59
68
77
86
95
104
113
114,8 °F
46 °C
36 °C
96,8 °F
122
-15
-10
-5
0
5
10
15
20
25
30
35
40
45
50
°C
°C
°F
°F
-6
-7
-8
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
17,6
19,4
21,2
23,0
24,8
26,6
28,4
30,2
32,0
33,8
35,6
37,4
39,2
41,0
42,8
44,6
46,4
48,2
50,0 51,8
53,6
55,4
57,2
59,0
60,8
62,6
64,4
66,2
68,0
Thermostatic valve °
Thermostatic valve Y
Thermostatic valve X
STANDARD
STANDARD
functioning
functioning
Functioning only with "I" funs
Functioning only with "I" funs
Functioning with
Functioning with
glycoled water
glycoled water
Functioning only with "I"
Functioning only with "I"
funs
funs
+
+
water glycoled
water glycoled
25
20
15
30
35
40
45
50
55
60
-10
-15
-20
-5
0
5
10
15
20
25
30
35
40
45
50 °C
°C
°F
°F
14
5
-4
23
32
41
50
59
59
68
68
77
77
86
86
95
95
104
104
113
113
122
122
131
140
42 °C
107,6 °F
-15 °C
5 °F
55 °C 131 °F
STANDARD
STANDARD
functioning
functioning
Functioning
Functioning
only with "I"
only with "I"
funs
funs
REFRIGERANT SIDE
High pressure
side
Low pressure
side
Acceptable maximum pressure
bar/PSI
45/653
30/435
Acceptable maximum temperature
°C / °F
120 / 248
51 / 131
Acceptable minimum temperature
°C / °F
-30 / -22
-30 / -22
WATER SIDE
Acceptable maximum pressure
bar/PSI
6/87
9.3. PROJECT DATA
ATTENTION
Contact our technical sales depart-
ment if the unit needs to operated
outside the operating limits.
ATTENTION
If the unit is installed in particu-
larly windy areas, we recommend
providing for windbreak to avoid
malfunctioning of the DCPX
device.
Note:
1 - In summer mode the unit can be started
with external air 46°C/114,8°F and water inlet
35°C/95°F. In winter mode the unit can be started
with external air -15°C/5°F and water inlet
10°C/50°F. Operate in such conditions is permit
-
ted only for a short time and to bring the system
up to temperature. To reduce the time of this
operation, it is recommended to install a three-
way valve that allows bypassing water from the
system utilities, until the conditions that allow
the unit to work within the permitted operation
limits are achieved.
Hydarulic circuit safety valve
(only in version with storage tank or with pump)
Calibrated at 6/87 bar/PSI and with piped discharge, which intervents
by discharging overpressure if abnormal work pressure occur.