22.04 – 4139181_04
13
22.04 – 4139181_04
13
4
MAIN HYDRAULIC CIRCUITS
WITHOUT HYDRONIC KIT
Water filter: Installation in the immediate vicinity of the heat exchanger is man-
datory,.
Do not fill up the hydraulic system by glycol near the suction of the pump. High
concentration of glycol could stuck the pump. Do not use the pump to mix water
and glycol.
Components as standard
1
Plate heat exchanger
2
Antifreeze electric heater
3
Water temperature sensors (IN/OUT)
4
Water filter (as standard)
Components not provided and responsibility of the installer
5
Anti-vibration joints
6
Air drain valve
7
Flow switch (MANDATORY)
8
Pump
9
Drain valve
10 Pressure gauge
11 Flow shut-off valves
12 Expansion vessel
13 Pressure relief valve
14 Loading unit
15 Storage tank
4
2
1
1
3
3
6
6
7
9
9
5
5
1
1
1
1
1
1
8
5
1
6
1
4
1
2
0
1
3
1
Water characteristics
System: Chiller with plate heat exchanger
PH
7,5 - 9
Total hardness
4,5 - 8,5 °dH
Electric conductivity
10-500 μS /cm
Temperature
< 65 °C
Oxygen content
< 0,1 ppm
Max. glycol amount
50 %
Phosphates (PO₄)
< 2ppm
Manganese (Mn)
< 0,05 ppm
Iron (Fe)
< 0,2 ppm
Alkalinity (HCO₃)
70 - 300 ppm
Chloride ions (Cl-)
< 50 ppm
Free chlorine
< 0,5 ppm
Sulphate ions (SO₄)
< 50 ppm
Sulphide ion (S)
None
Ammonium ions (NH₄)
None
Silica (SiO₂)
< 30 ppm
It is of fundamental importance to keep the oxygen concentration in
the water under control, especially in open vessel systems. This type
of system, in fact, is very sensitive to the phenomenon of extra-oxy-
genation of the water (an event that can be encouraged by the incor-
rect positioning of some components). This phenomenon can trigger
corrosion processes and subsequent drilling of the heat exchanger
and pipes.
