Mounting The Indoor Unit; Guidelines When Installing The Indoor Unit - Daikin FXSN112A2VEB Installer And User Manual

15.2 Mounting the indoor unit

15.2.1 Guidelines when installing the indoor unit

FXSN50~112A2VEB
CO₂ Conveni-Pack: indoor unit
4P602817-1 – 2020.02
INFORMATION
Even if there is no refrigerating system on the lowest floor, the total refrigerant
charge in the building CANNOT exceed the value for QLMV. Provide mechanical
ventilation in accordance with EN 378-3:2016.
Space volume calculation
Take into account following requirements for the space volume calculation:
▪ The space considered is any space that contains refrigerant-containing parts or
into which refrigerant can be released.
▪ Use the room volume of the smallest, enclosed, occupied space to determine the
refrigerant quantity limits.
▪ Multiple spaces that have appropriate openings (which cannot be closed)
between the individual spaces or are connected with a common ventilation
supply, return or exhaust system not containing the evaporator or the condenser
shall be treated as a single space.
▪ Where the evaporator or condenser is located in an air supply duct system
serving multiple spaces, the volume of the smallest single space shall be used.
▪ If the airflow to a space cannot be reduced to less than 10% of the maximum
airflow using an airflow reducer, then that space shall be included in the volume
of the smallest human occupied space.
▪ For refrigerants of safety class A1, the total volume of all the rooms cooled or
heated by air from one system is used as the volume for calculation, if the air
supply to each room cannot be restricted below 25% of its full supply.
▪ For refrigerants of safety class A1, the effect of the air changes may be
considered in calculating the volume if the space has a mechanical ventilation
system which will be operating during the occupation of the space.
▪ Where the evaporator or condenser is located in an air supply duct system and
the system serves a non-partitioned multi-storey building, the occupied volume
of the smallest occupied storey of the building shall be used.
▪ Include the space above a false ceiling or partition in the volume calculation
unless the false ceiling is airtight.
▪ Where an indoor unit, or any related refrigerant-containing pipework, is located
in a space where the total charge exceeds the allowable charge, make special
provisions to ensure at least an equivalent level of safety.
INFORMATION
Optional equipment. When installing optional equipment, also read the installation
manual of the optional equipment. Depending on the field conditions, it might be
easier to install the optional equipment first.
Installation options
INFORMATION
The unit can be used with bottom suction by replacing the interchangeable plate by
the air filter holding plate.
15 Unit installation
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Installer and user reference guide
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