EG
13
Always check the gas
density for the room in
which the unit is installed.
■
Check of limit density
When installing an air-conditioner in a room, it is necessary to
ensure that even if the refrigerant gas accidentally leaks outside,
its density does not exceed the limit level.
If the density might exceed the limit level, it is
necessary to set up an opening between it and the adjacent
room, or to install a mechanical ventilation which is interlocked
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 refrigerant charge amount at shipment, please refer
to the unit's nameplate.)
6-3.
Installing Distribution Joint
(1) Refer to “HOW TO ATTACH DISTRIBUTION JOINT”
enclosed with the optional distribution joint kit (DDV
1912, DQV 1910).
(2)
●
The T-joint (not provided) installation direction should
be either horizontal or vertical. The direction of the
connection port to each indoor must be slanted
slightly upward (15° to 30°) when the main tube is
horizontal and can be any direction but the branch
tube must be slightly upward when the tube is
vertical (L3 shows the length between the first T-joint and
the tube welded end (1 meter or less)).
●
Make sure that the end point is solidly welded shut
and that the connection tube, inside the T-joint, doesn’t
block the refrigerant flow.
●
Never diverge a branch tube again after the T-joint
(that is, there can only be 1 branch in a line)
WARNING
Minimum indoor volume & floor area as against the amount
of refrigerant is roughly as given in the following table.
Pay a special attention to
the place, such as a
basement, etc. where
refrigerant can stay, since
refrigerant is heavier than
air.
CAUTION
6-4.Optional Distribution Joint Kits
●
DDV 1912: Cooling capacity after distribution is 16.0 kW (54,600 BTU/h) or less
●
DQV 1910: Cooling capacity after distribution is 16.0 kW (54,600 BTU/h) or less
Distribution Branch Size (
ll
1,
ll
2,
ll
3,
ll
4)
Indoor unit type
9 type
12 type
18 type
25 type
36 type
48 type
Wide tube
Narrow tube
9.52 (3/8) *
12.7 (1/2)
15.88 (5/8)
19.05 (3/4)
NOTE
* In case of 25 type, use the “Tube connector” (accessory supplied with the indoor unit) for sizing up narrow tube from 6.35 to 9.52.
L3 1 m
<
–
Main tube
Outdoor
Solidly
welded shut
Indoor
Horizontal
Slant
15° to 30°
Indoor L3
≤
1m
Indoor
Indoor
Slant
15° to 30°
When in horizontal use
When in vertical use
Solidly welded shut
Can be at
any angle
Indoor
Indoor
Outdoor
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
1169_M_I
20
30
40 kg
Min. indoor floor area
(when the ceiling is 2,7 m high)
Range below the
density limit of
0,3 kg/m
3
(Contermeasures
not needed
Range above the
density limit of
0,3 kg/m
3
(Contermeasures
needed
Total amount of refrigerant
Min. indoor volume
