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2.10 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.
2.11 ANTIFREEZE PROTECTION
The appliance has an antifreeze function that switches the burner on automatically when the temperature drops below 4°C (standard
protection to minimum temperature of -5°C).
In order to guarantee the integrity of the appliance and the domestic hot water heating system in areas where the temperature drops be-
low zero, we recommend protecting the central heating system using anti-freeze liquid and installing the Immergas Antifreeze Kit in the
appliance.
All information on antifreeze protection can be found in the Installer section at Parag. 1.4.
2.12 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.
2.13 CLEANING THE CASE
1. Use damp cloths and neutral detergent to clean the appliance casing.
Never use abrasive or powder detergents.
2.14 CLEANING THE KEYBOARD
1. Before cleaning the keyboard, it is recommended to lock it (See "Keyboard Locking" Parag. 2.4) and clean the polished surface using a
damp cloth and mild soap.
Never use abrasive or powder detergents.
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