13
CAUTION
CAUTION
WARNING
1. This unit requires no additional refrig-
erant charge up to tubing length 30 m.
In case of more than 30 m, additional
refrigerant charge is required. Refer to
Tables 1-6 and 1-7.
2. In case of multi type installation,
indoor units should be installed within
the same room. If multi type indoor
units are installed in different rooms,
temperature control may develop prob-
lems because thermostat operation
must follow the thermostat condition
of 1 indoor unit only (the main unit).
Always check the gas density
for the room in which the unit is
installed.
Pay special attention to any
location, such as a basement
or recessed area, etc. where
leaked refrigerant can collect,
since refrigerant gas is heav-
ier than air.
10
13.5
27.0
40.5
54.0
67.5
81.0
94.5
108
121.5
135
5
10
15
20
25
30
35
40
45
50
m
3
m
2
Total amount of refrigerant
Min. indoor floor area
(when the ceiling is 2.7 m high)
Min. indoor volume
20
30
40 kg
Range below the
density limit of
0.3 kg/m
3
(Countermeasures
not needed)
Range above the
density limit of
0.3 kg/m
3
(Countermeasures
needed)
■
Check of limit density
When installing an air conditioner in a room, it is neces-
sary to ensure that even if the refrigerant gas acciden-
tally escapes, its density does not exceed the limit level.
If the density might exceed the limit level, it is neces-
sary to set up an opening between it and the adjacent
room, or to install mechanical ventilation which is inter-
locked with the leak detector.
(Total refrigerant charged amount : kg)
(Min indoor volume where the indoor unit is installed : m
3
)
≤
Limit density 0.3 (kg/m
3
)
The limit density of refrigerant which is used in this unit
is 0.3 kg/m
3
(ISO 5149).
The shipped outdoor unit comes charged with the
amount of refrigerant fixed for each type; so add it to
the amount that is charged at the field. (For the refriger-
ant charge amount at shipment, refer to the unit’s
nameplate.)
Minimum indoor volume & floor area relative to
the amount of refrigerant is roughly as given in
the following table.
04-393 DC INV Tech p a-44 12/15/04 3:04 PM Page 13
