Water Connections; Connection Diagram; Position Of Connections; Hydraulic Data - Ferroli RCI 35-40 Installation, Maintenance And User Manual

4. Water
connections
4.1

Connection diagram

4.2

Position of connections

4.3

Hydraulic data

4.4 Connection to the system
4.5 System fill-up
4.1 Connection diagram
1 Unit
ANT Anti-vibration joint (recommended)
CV Check valve
FL Flow switch (mandatory)
FTR Mesh filter (mandatory)
MN Water gauge
MP Circulating pump
RI Shut-off ball valve
RIC Automatic water filling valve
SFA Automatic air vent (mandatory)
ST Inertial tank
VE Expansion vessel
VSI Safety valve (mandatory)
Some of the components in the diagram may already be included in the unit with the
hydronic kit. Those not included must be provided by the installer.
Connection pipes must have a suitable diameter and be supported so as not to impose
their weight on the unit.
4.2 Position of connections
The position of the water connections and the inlet and outlet direction is indicated by the labels
on the connections.
4.3 Hydraulic data
4.3.1 Water volume
The machine electronic control, to protect the electrical motor, limits hourly start up of the
compressor.
This operation creates oscillations of the water temperature in the draw-off point, affecting plant
efficiency.
For a proper operation it is necessary the water content complies with the following table:
Evaporator water flow
Pmin
Pmax
V
Pmin Evaporator minimum flow
14
Model
91 101 131 151
l/s 0.95 0.85 1.01 1.14
l/s 1.85 2.26 2.71 3.05
L 70 85 105 120
Pmax Evaporator maximum flow
V Water volume
If the water volume in the circuit (V) does not reach what is indicated, installing a new inertial
storage tanks shall be required.
4.3.2 Water features
Water features are important for the proper operation of the machine and for its lifetime.
Extreme water hardness leads to the formation of limestone in exchangers reducing their
performance.
The table shows some water parameters to be observed for proper operation of the machine.
Content
pH
Alkalinity HCO3
Sulphate SO42-
Alkalinity/Sulphate HCO3-/SO42-
Electrical conductivity μS/cm
Ammonium NH4
Free chlorine Cl2
Hydrogen Sulphide H2S
Free Carbon Dioxide CO2
Nitrate NO3
Iron Fe
Aluminium AL
Manganese MN
1 - Good corrosion resistance.
2 - If different factors of this type are present, corrosion can occur.
3 - Use not recommended.
4.3.3 Protection against freezing
If you do not wish to drain the system during periods where the machine is not used, the water
may freeze, or if the system must operate with temperatures less than 5°C, ethylene glycol must
be mixed with the water.
Material
Concentration mg/l or ppm
AISI 316L Copper
<6 2
6-7.5 2
7.5-9 1
>9 1
- <70 1
70-300 1
>300 1
<70 1
70-300 1
>300 1
>1 1
<1 1
<10 1
10-500 1
>500 1
<2 1
2-20 1
>20 1
<1 1
1-5 3
>5 3
<0.05 1
>0.05 1
<5 1
5-20 1
>20 1
<100 1
>100 1
<0.2 1
>0.2 1
<0.2 1
>0.2 1
<0.1 1
>0.1 1
2
2
1
2
2
1
2
1
3
3
1
3
2
1
2
1
2
3
1
1
3
1
3
1
2
3
1
2
1
2
1
2
1
2