3
2.3.2 Room Area Limitations
The system uses R32 refrigerant, which is classified as
class A2 and is flammable under EN 60335-2-40. Follow
the requirements below to ensure that the system
complies with legislation.
The total amount of refrigerant in the system shall be less
than or equal to the maximum refrigerant charge. The
maximum refrigerant charge depends on the volume of
space in the rooms being served by the system.
The room area (A) shall be defined as the room area
enclosed by the projection to the base of the walls,
partitions and doors of the space in which the appliance
is installed.
● The space considered shall be any space
which contains refrigerant-containing parts or
into which refrigerant could be released.
● The room area (A) of the smallest, enclosed,
occupied space shall be used in the
determination of the refrigerant quantity limits.
WARNING
In addition, the maximum refrigerant charge is also related
to the installation height of the DHW kit and hydraulic
module of the IDU. The correspondence of the maximum
refrigerant charge with the minimum room area (Amin) is
shown in Figure 1 and Table 1. And different values are
used for different indoor installation heights:
● The VRF IDU installation height cannot be
less than 1.8 m. For more detailed instructions
on the installation height of the IDU, please
refer to the corresponding Installation Manual
and Owner’s Manual.
● If the installation height of the VRF IDU is
less than 1.8 m, please contact your installer
or dealer to receive more information and
professional advice.
CAUTION
■
Installation scheme flow chart
Check if the minimum
room area meets the
requirements
Determine the room size
and the refrigerant
system configuration
Decrease piping
length by changing
layout
Calculate the total refrigerant
charge (Mc) according to section
15.1
Determine the strategy of the
refrigerant charge and room area
limitations following section 2.3.2
Check the corresponding table
to get the maximum refrigerant
charge (Mmax)
1. Select the IDU with a
larger air flow
2. Decrease piping length
by changing layout
3. Increase the minimum
room area
4. Adopt additional
measures as described in
applicable legislation
Mc ≤ 7.7 kg?
Mc ≤ Mmax
OK
No
No
Yes
Yes
Содержание KMF-80 DVR5
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