i-32V5 Air/water inverter heat pumps with axial fansi
19
PLUMBING CONNECTIONS
The plumbing connecons must be made in accordance with naonal and/or local regulaons; pipes can be made of steel, galvanised steel or
PVC. Pipes must be accurately sized according to the nominal water ow rate of the unit and the pressure drops of the water circuit. All pipes
must be insulated with closed-cell material of adequate thickness. The chiller must be connected to the pipes using new exible joints, not re-
used ones. The water circuit should include the following components:
• Well thermometers to monitor the circuit’s temperature.
• Manual gate valves to isolate the chiller from the water circuit.
• Metal Y lter and dirt separator (installed on the return pipe) with metal mesh no larger than 1 mm.
• Loading group and exhaust valve where necessary.
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To guaratee correct operaon of the unit, the water must be appropriately ltered (see the instrucons at the start of this paragraph) and there
must be only a minimum amount of dissolved substances. The maximum allowed values are shown below
MAXIMUM CHEMICAL-PHYSICAL PROPERTIES ALLOWED FOR THE CIRCUIT WATER
PH 7,5 - 9
Electrical conducvity 100 - 500 μS/cm
Total hardness 4,5 – 8,5 dH
Temperature ˂ 65°C
Oxygen content ˂ 0,1 ppm
Max glycol quanty 40 %
Phosphates (PO4) ˂ 2ppm
Manganese (Mn) < 0,05 ppm
Iron (Fe) < 0,3 ppm
Alkalinity (HCO3) 70 – 300 ppm
Chloride ions (Cl-) < 50 ppm
Sulphate ions (SO4) < 50 ppm
Sulphide ions (S) No one
Ammonium ions (NH4) No one
Silica (SiO2) < 30 ppm
A recommended connecon diagram is shown bellow.
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