Installation Installation in technical rooms The indoor unit can be installed in technical rooms (NOT inhabited) with ventilation openings directly to the outside. The technical room refers to a delimited area of the home, protected by a locked door and accessible only by authorised personnel and by the owner of the room. The room must be protected against frost. Check and refer always to technical room definition and requirements according to National Regulations. In this case there are no limitations regarding the minimum installation Area. When refrigerant mass (Mc) is higher than 1,84 kg, openings for natural ventilation shall be provided. The ANV min area can be obatained with the following formula: ANVmin (cm 2 ) = 0.05 x √Mc NOTE: Mc shall be evaluated in kg Two permanently open ventilation openings are required, one at the top and one at the bottom: – for inhabited environments, between A and B – for uninhabited environments, towards the outside Rules for natural ventilation openings in technical rooms – Bottom opening: The bottom opening must meet the minimum area requirements (ANVmin). If the ventilation opening starts from the floor, the height must be ≥20 mm. The bottom of the opening must be situated ≤100 mm from the floor. At least 50% of the required opening area must be situated

Installation NOTE: The requirement for the second opening can be met by drop ceilings, ventilation ducts, or similar arrangements that provide an airflow path between the connected rooms. ≥ANV min 300 mm ≥1500 mm ≥1500 mm ≥1500 mm 200 mm 100 mm 20 mm 0 mm ANV min ≥ANV min 300 mm ≥1500 mm 200 mm 100 mm 20 mm 0 mm ANV min Fig. 37 25 / EN

Installation Installation in technical rooms The indoor unit can be installed in technical rooms (NOT inhabited) with ventilation openings directly to the outside. The technical room refers to a delimited area of the home, protected by a locked door and accessible only by authorised personnel and by the owner of the room. The room must be protected against frost. Check and refer always to technical room definition and requirements according to National Regulations. In this case there are no limitations regarding the minimum installation Area. When refrigerant mass (Mc) is higher than 1,84 kg, openings for natural ventilation shall be provided. The ANV min area can be obatained with the following formula: ANVmin (cm 2 ) = 0.05 x √Mc NOTE: Mc shall be evaluated in kg Two permanently open ventilation openings are required, one at the top and one at the bottom: – for inhabited environments, between A and B – for uninhabited environments, towards the outside Rules for natural ventilation openings in technical rooms – Bottom opening: The bottom opening must meet the minimum area requirements (ANVmin). If the ventilation opening starts from the floor, the height must be ≥20 mm. The bottom of the opening must be situated ≤100 mm from the floor. At least 50% of the required opening area must be situated

Installation NOTE: The requirement for the second opening can be met by drop ceilings, ventilation ducts, or similar arrangements that provide an airflow path between the connected rooms. ≥ANV min 300 mm ≥1500 mm ≥1500 mm ≥1500 mm 200 mm 100 mm 20 mm 0 mm ANV min ≥ANV min 300 mm ≥1500 mm 200 mm 100 mm 20 mm 0 mm ANV min Fig. 37 25 / EN