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Idiomas disponibles
If the water inlet is inadvertently closed when the pump is running and the water outlet is open, air
will enter the tank with the probable intervention of the level sensor. It will be necessary to vent the
hydraulic circuit to eliminate the air.
Subsequent checks
1. Check that the tank and the circuit are completely full of water and that all the air has been expel-
led from the system.
2. The water circuit must always be kept full. For this reason, carry out periodic checks and top the
circuit up if necessary, or install an automatic fi lling kit.
3. water characteristics
If not provided in the supply, fi t a mesh fi lter on the water inlet
Y,
Water characteristics: :
Temperature
ΔT IN/OUT
Max % glycol
PH
Electrical conductivity
Langelier saturation index
SO
2-
4
NH
3
Please note that for special water types such as demineralized, deionized or distilled it is necessary
to contact the manufacturer to verify which kind of chiller should be used since the standard material
may not be suitable.
3.3.2 Water and ethylene glycol
If installed outdoors or in an unheated indoor area, it is possible that the water in the circuit may
freeze if the system is not in operation during the coldest times of the year.
To avoid this hazard:
Outlet water
• Equip the chiller with suitable
temperature [°C]
antifreeze protection devices,
available from the manufacturer
as optional accessories;
• Drain the system via the drain
valve if the chiller is to remain
idle for a prolonged period;
• Add an appropriate quantity of
antifreeze to the water in circula-
tion (see table).
Sometimes the temperature of the outlet water is so low as to require the addition of ethylene glycol
in the following percentages.
English
CL
-
≥50°F (10°C)
5-15°C
CaCO
70-150 ppm
3
40
O
<0.1 ppm
2
7.5-9
Fe
<0.2 ppm
10-500 μS/cm
NO
3
HCO
-
0-1
70-300 ppm
3
H
S
<50 ppm
<0.05 ppm
2
<1 ppm
CO
2
Al
<0.2 ppm
Ethylene glycol
Ambient
(% vol.)
temperature
4
5
2
10
0
15
-2
20
-4
25
-6
30
-10
40
3.3.3 Expansion tank
To avoid the possibility of an increase or decrease in the volume of the fl uid due to a signifi cant change
in its temperature causing damage to the machine or the water circuit, we recommend installing an
expansion tank of suitable capacity.
The expansion tank must be installed on intake to the pump on the rear connection of the tank.
The minimum volume of an expansion tank to be installed on a closed circuit can be calculated using
the following formula:
V=2 x Vtot x (Pt min - P t max)
where
Vtot= vol. circuit total (in litres)
P t min/max= specifi c weight at the minimum/maximum temperature reached by the water [kg/dm3].
The specifi c weight values at different temperatures for glycol percentage values are given in the
<50 ppm
table
%
glycol
-10
0%
1.0024
10%
1.0177
<2 ppm
20%
1.0330
30%
1.0483
40%
1.0636
<5 ppm
!
Caution: When fi lling the system, take into account the capacity of the expansion vessel as well.
If the ambient air temperature at the chiller is less than -10°C then you must move the expansion
tank to a protected ambient close on the water return side of the chiller. The safety valve and bleed
valve must remain at the chiller.
-2
-5
-7
-10
-12
-15
-20
ICEP080E-ICEP120E
Temperature [°C]
0
10
20
30
1.0008
0.9988
0.9964
0.9936
1.0155
1.0130
1.0101
1.0067
1.0303
1.0272
1.0237
1.0199
1.0450
1.0414
1.0374
1.0330
1.0594
1.0525
1.0511
1.0461
40
50
0.9905
0.9869
1.0030
0.9989
1.0156
1.0110
1.0282
1.0230
1.0408
1.0350
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