i-32V5C MIDI
Inverter Air/Water chillers with axial fan
15
CAUTION: the expansion vessel, to be provided externally, must be suitably sized according to the type and volume of fluid,
the variation of temperatures and pressures in the system.
CAUTION: The return line from the system must be at the "WATER INPUT" label, otherwise the evaporator could freeze.
CAUTION: It is compulsory to install a metal filter (with a mesh size of no more than 1 mm) and a dirt separator on the return
pipe from the installation marked "WATER INPUT". If the flow switch is manipulated or altered, or if the metal filter and the
deflector are not present on the installation, the warranty will be immediately void. The filter and the dirt separator must be
kept clean, so make sure they are still clean after the unit is installed and check them periodically.
All units leave the factory with a flow switch (factory installed). If the flow switch is tampered with or removed, or if the wa
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ter filter and deflector are not present in the unit, the warranty will be void. Refer to the wiring diagram enclosed with the
unit for the connection of the flow switch. Never jumper the flow switch connections in the terminal block.
The heating system and safety valves must conform to the requirements of EN 12828.
4.1
SYSTEM WATER SPECIFICATIONS
To ensure that the unit functions properly, the water must be adequately filtered (see the beginning of this section) and the quantity of dissolved
substances must be minimal. The maximum permitted values are listed below.
MAXIMUM PERMITTED CHEMICAL AND PHYSICAL CHARACTERISTICS OF THE SYSTEM WATER
PH
7,5 - 9
Electrical conductivity
100 - 500 μS/cm
Total hardness
4,5 – 8,5 dH
Temperature
˂ 65°C
Oxygen content
˂ 0,1 ppm
Max. glycol quantity
40 %
Phosphates (PO4)
˂ 2ppm
Manganese (Mn)
< 0,05 ppm
Iron (Fe)
< 0,3 ppm
Alcalinity (HCO3)
70 – 300 ppm
Chlorine ions(Cl-)
< 50 ppm
Sulphate ions (SO4)
< 50 ppm
sulphide ion (S)
No one
Ammonium ions(NH4)
No one
Silica (SiO2)
< 30 ppm
4.1.1
Typical hydraulic scheme
The following is a recommended connection diagram
Summary of Contents for bi-32V5C MIDI 0128
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