OPERATING AND MAINTENANCE MANUAL
Chapter 5 - Installation
iC 215 ÷ iC 780
24
The data in this manual are not binding and they can be modified by the manufacturer without notice.
Reproduction of this manual is strictly prohibited
ENGLISH
EN
5 . 3
F r e e z e p r o t e c t i o n
Even if the minimum operating temperature is higher than 0°C, during shutdown periods in the cold season the unit may be
subject to temperatures that are lower than 0°C.
In such cases if the water is not drained out of the unit ethylene or propylene glycol antifreeze should be added to the water
in the following percentages:
In accordance with the chilled water outlet temperature, to avoid the formation of ice ethylene or propylene glycol antifreeze
should be added to the water in the following percentages:
NOTE
The water flow rate must correspond to the value stated in the technical specifications or in the selection software.
The conditions specified in the table do not guarantee anti-freeze protection with the machine operating in bypass mode
between water delivery and return, and with the machine water inlet and outlet fittings shut off.
ATTENTION
The anti-freeze setting is 4°C. To reduce the anti-freeze setting edit parameter AL26.
5 . 3 . 1
O p e r a t i n g l i m i t s
The operating limits are decided at the time of sale. Refer to the data specified in the contract.
NOTE
For water outlet temperatures <= +5°C we recommend the use of anti-freeze solutions (compatible with the contact
materials);
(1) value referred to the unit chosen with the configurator option “-20°C ambient”. The unit is thus equipped with electronic
fans control and electrical cabinet heater.
If glycol is not used in the circuit it is advisable to equip the unit with anti-freeze heaters;
(2) reference value for the range with outlet water temperature of 15°C.
Ambient T up to
[°C]
Ethylene Glycol
[% by weight]
Propylene Glycol
[% by weight]
0
0
0
-5
15
18
-10
25
27
-15
30
33
-20
40
40
Water outlet T up to
[°C]
Ethylene Glycol
[% by weight]
Propylene Glycol
[% by weight]
Standard machine
7
0
0
3
20
2
0
0
20
2
5
-3
25
30
-5
30
30
-7
35
3
5
-10
35
40
Special machine
-15
45
45
-20
50
50
Ambient air temperature
Evaporator water
inlet temperature
Evaporator water
outlet temperature
Water temperature
gradient
Min
Max
Min
Max
Min
Max
Min
Max
Fans control type
°C
°C
°C
°C
-5
43
(2)
0
35
-5
30
4
10
ON/OFF
5
43
(2)
-5
35
-10
30
-5
43
(2)
-5
35
-10
30
4
10
ELECTRONIC
-20
(1)
43
(2)
-5
35
-10
30