10 23.05 6755517_09
INTERNAL AND EXTERNAL HYDRAULIC CIRCUIT WITH ANL HP
Water lter: Installation in the immediate vicinity of the heat exchanger
is mandatory,.
Components as standard
1 Plate heat exchanger
2 Water temperature sensors (IN/OUT)
3 Flow switch
4 Pump
5 Expansion vessel
6 Pressure relief valve
7 Water lter
8 Air drain valve
Components not provided and responsibility of the
installer
9 Anti-vibration joints
10 Flow shut-o valves
11 Air drain valve
12 Pressure gauge
13 Expansion vessel
14 Storage tank
15 Drain valve
1
2
2
4
5
13
7
6
8
11
11
9
9
10
10
12
12
14
15
3
Do not ll 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.
Water characteristics
System: Chiller with plate heat exchanger
PH 7,5 - 9
Total hardness 4,5 - 8,5 °dH
Electric conductivity 10-500 S /cm
Temperature < 65 °C
Oxygen content < 0,1 ppm
Max. glycol amount 50 %
Phosphates (PO) < 2ppm
Manganese (Mn) < 0,05 ppm
Iron (Fe) < 0,2 ppm
Alkalinity (HCO) 70 - 300 ppm
Chloride ions (Cl-) < 50 ppm
Free chlorine < 0,5 ppm
Sulphate ions (SO) < 50 ppm
Sulphide ion (S) None
Ammonium ions (NH) None
Silica (SiO) < 30 ppm
WARNING under no circumstances does the unit have to be operated
with water circulating on the heat exchanger whose characteristics
are dierent from those indicated in the table WATER CHARACTER-
ISTICS, under penalty of the warranty expiration. Aermec cannot be
held responsible for any malfunction of the units which are operated
with water whose characteristics are outside the limits in the table
WATER CHARACTERISTICS and for their consequences.
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.
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