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6.4.1
Source hydraulic circuit
Reference hydraulic diagram for connecting the unit to the source circuit.
02
Condenser
09
Water filter
91
Thermometer
EL
Motor-driven pump
FL
Flow switch (mandatory in "HP" versions)
GA
Flexible coupling
GR
System filling unit
MA
Water pressure gauge
RB
Valve
SA
Safety valve
SF
Air valve
VE
Expansion vessel
VR
Check valve
It is essential for the water to come in at the connection indicated in the dimensional diagram and with the
relevant plate on the unit.
Failing this, there would be a decline in the operating efficiency of the heat exchanger and, in "HP" units, there would be a
risk of it being frozen since control by the antifreeze probe would be thwarted.
The hydraulic circuit must be made so as to guarantee the water flow rate to the heat exchanger for correct operation within
the set limits (see the Technical Catalogue).
If the potential free contacts for controlling the source circuit pump are present, connect the pump as shown
in the wiring diagram.
34
Translation from original instructions
Fig. 7 Recommended hydraulic circuit
We reserve the right to make changes without any prior notice.
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