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We reserve the right to make changes without any prior notice.
Translation from original instructions
2.2.8 Hydraulic connection to the heat recuperator (DC option)
The heat recuperator must be connected to a closed hydraulic circuit.
Constant renewal of water causes limescale to build up in the exchanger, which reduces its efficiency in a
short time and makes it unserviceable.
All units equipped with heat recuperator have water temperature control probe on the return from the system.
The microprocessor controller enables the heat recovery unit when necessary, by disabling the condenser, and restores its
operation when the heat recovery unit water temperature has reached the required value.
If an anomaly occurs on the hydraulic heat recovery circuit, the controller will restart the condenser.
It is essential for the water to come in at the connection indicated in the dimensional diagram and with the
relevant label on the unit.
A modulating three-way valve that will ensure an incoming water temperature within the operating limits
stated in the Technical Catalogue must be installed for correct operation of the unit.
Fig. 5 3-way valve installation layout
02
Heat recuperator
EL
Motor-driven pump
V3
Thermostatic three-way valve
As an alternative to the 3-way modulating valve, it is possible to use a pressure switch valve for each refrigerant circuit that
will ensure an average condensing temperature of at least 40°C.
Fig. 6 Pressure switch valve installation layout
02
Heat recuperator
40
Pressure switch valve
