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2.16 EMPTYING THE D.H.W. CIRCUIT
To do this, always close the domestic cold water inlet upstream of the appliance.
Open any domestic hot water tap to discharge the pressure from the circuit.
2.17 ANTIFREEZE PROTECTION
The hybrid heat pump is equipped with an anti-freeze protection function that is active at different levels ("O.U. antifreeze function" pa-
rameter setting). If configured as "Level 2" or "Level 3", it consists of switching on the circulator according to the temperatures detected at
the outdoor unit and, if the system water temperature is not sufficient to prevent freezing, also the burner of the indoor unit.
If "Level 3" of the "O.U. antifreeze function" parameter is active, this function has priority over the domestic hot water produc-
tion function, so it may happen, in the case of prolonged domestic hot water withdrawals, that domestic hot water production is
interrupted.
All information relative to the antifreeze protection is stated in (Parag.1.4).
2.18 PROLONGED INACTIVITY
In case of prolonged inactivity (e.g. second home), we recommend:
1. close the gas;
2. to switch off the power supply;
3. completely empty the CH circuit (to be avoided if glycol is present in the system) and the appliance's DHW circuit. In systems that are
drained frequently, filling must be carried out with suitably treated water to eliminate hardness that can cause lime-scale.
2.19 CLEANING THE CASE
1. Use damp cloths and neutral detergent to clean the appliance casing.
Never use abrasive or powder detergents.
2.20 PERMANENT SHUTDOWN
In the event of permanent shutdown of the appliance, contact professional staff for the procedures and ensure that the electrical, water
and gas supply lines are shut off and disconnected.
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