Fujitsu ASYG12LJCA - Checking Concentration Limit

6. SYSTEM DESIGN
CHECKING CONCENTRATION LIMIT11-2.
Check concentration limit following steps

, and take appropriate measures depending on
the situation.

Calculate amount of all replenished refrigerant (kg) per refrigerant system.
Amount of replenished
refrigerant per refrigerant
system
Amount of additional
replenished refrigerant
Total amount of replenished
refrigerant in refrigerant
system (kg)
+ =
Amount of replenished
refrigerant at factory
shipment
Amount of additionally
replenished refrigerant
depending on piping
length , piping diameter
and indoorunit model at
customer.
Note : When one refrigerant
system is divided into 2 or more
refrigerant systems and each
system is independent, total
amount of replenished refrigerant
of each system shall be adopted.

Smallest room volume.
Calculate room volume by regarding
portion as one room or the smallest room.
(a) Without partition
Outdoor unit
Branch box
Indoor unit
Outdoor unit
Indoor unit
Partition
Opening
(b) When there are partitions,
but there is an effective
opening for ventilation
between the rooms.
Branch box
Outdoor unit
Indoor unit
Small
est
room
(c) With partition and without
opening which serve as
passage of air to adjoining
room.
Branch box
Outdoor unit
(d) When a mechanical ventilation
device linked to a gas leak detection
warning device is mounted in the
smallest room. The room with the
second smallest area is the target.
Branch box

Calculate refrigerant concentration from the results of

and

Total amount of
replenished refrigerant in
refrigerant facility (kg)
When the result of calculation
exceeds the concentration limit,
perform the same calculations by
shifting to the second smallest,
and the third smallest rooms
unti the na resut is beow the
concentration limit .
erigerant concentration g
3
)
(R410A)
Capacity of smallest
room where indoor unit is
installed (m
3
)
- (06 - 149) -
SYSTEM DESIGN SYSTEM DESIGN