14
The application also has a maximum design
refrigerant charge limit of 12 kg, which cannot be
exceeded in any circumstances.
If the system applies to case (d) in Figure
1-5 and Table 1-5, the minimum room area for
a 18 kW outdoor unit must not be less than 10
m
2
.
The maximum refrigerant limit described above
applies to unventilated areas. If adding
additional measures, such as areas with
mechanical ventilation, please refer to applicable
legislation for the maximum refrigerant limit.
The maximum refrigerant charge has to be
assessed for the room with the smallest room
area in both the lowest underground floor and
the other floors.
And in the lowest underground floor, the
maximum refrigerant charge is also related to
types of the indoor units, which have different
installation heights.
The lowest maximum allowable charge of all
shall be used.
If the unit is connected via an air duct system to
multiple rooms, the applicable maximum
refrigerant limits are different. Please contact
your installer or dealer for further information
and professional advice.
Determine the charge limit for the refrigerating system
as the smaller of:
1) The maximum refrigerant charge (Mmax) in the
system from the above room area limitations.
2) The maximum refrigerant charge (Mmax) with air
duct system or additional measures, such as areas with
mechanical ventilation.
3) 12 kg from the limit of the application.
The refrigerant leakage sensor can only use the
factory model or the specified model indicated
in the corresponding manual.
The R32 refrigerant leakage sensor must be
used to activate the refrigerant shut-off device,
the alarm device, incorporated circulation airflow
or other emergency controls, which shall give an
electrical signal at a predetermined alarm set
point in response to leaked refrigerant.
The location of leakage sensors shall be chosen
in relation to the refrigerant and they shall be
located where leaked refrigerant will
concentrate. Please refer to the indoor unit
installation manual for specific requirements.
The installation of the refrigerant leakage sensor
shall allow access for checking, repair or
replacement by an authorized person.
The refrigerant leakage sensor shall be installed
so its function can be verified easily.
The refrigerant leakage sensor shall be
protected to prevent tampering or unauthorized
resetting of the pre-set value.
To be effective, the refrigerant leakage sensor
must be electrically powered at all times after
installation, other than when servicing.
NOTE
NOTE
NOTE
CAUTION
CAUTION
