11
ENGLISH
17
Example:
LA
LD
LC
LB
3
1
2
4
5
Ɣ
Example of each tubing length
Main tubing
Distribution joint tubing
LA = 40 m
Indoor side
LB = 5 m
1 = 5 m
4 = 6 m
LC = 5 m
2 = 5 m
5 = 5 m
LD = 15 m
3 = 2 m
Ɣ
Obtain charge amount for each tubing size
Note that the charge amounts per 1 meter are different for
each liquid tubing size.
ø9.52
ĺ
LA + LB + LC + LD : 65 m × 0.056
kg
/m = 3.64
kg
ø6.35
ĺ
1+
2+
3+
4+
5
: 23 m × 0.026
kg
/m = 0.598
kg
Total 4.238
kg
Additional refrigerant charge amount is 4.238
kg
.
CAUTION
Be sure to check the limit density for the room in which the
indoor unit is installed.
Checking of limit density
Density limit is determined on the basis of the size of a room
using an indoor unit of minimum capacity. For instance,
when an indoor unit is used in a room (floor area 8.00 m
2
×
ceiling height 2.7 m = room volume 21.6 m
3
), the minimum
room volume should be 23.3 m
3
(10.238
kg
÷ 0.44
kg
/m
3
)
for refrigerant of 10.538
kg
(6.3
kg
+ 4.238
kg
). Accordingly,
openings such as louvers are required for this room.
<Determination by calculation>
Overall refrigerant charge amount for the air conditioner:
kg
(Minimum room volume for indoor unit: m
3
)
=
4.238 (
kg
) + 6.3 (
kg
)
= 0.49 (
kg
/m
3
) 0.44 (
kg
/m
3
)
21.6 (m
3
)
Therefore, openings such as louvers are required for this room.
20
10
0
304
0
607
08
0
90
10
0
50
m
2
m
3
40.5
54.0
27.0
13.5
0.0
67.5
81.0
94.5
108.0
121.5
135.0
148.5
162.0
175.5
189.0
202.5
216.0
15
10
5
0
20
25
30
35
40
45
50
55
60
65
70
75
80
229.5
85
kg
Total amount of refrigerant
Range below the density limit of 0.44
kg
/m³
(Countermeasures not needed)
Range above the density limit of 0.44
kg
/m³
(Countermeasures needed)
Min. indoor volume
Min. indoor floor area
(when the ceiling is 2.7 m high)
type
22
8 HP
type
28
type
36
type
45
type
56
00̲280220̲2WAY̲Eng.indb 17
2016/06/09 18:10:58
18
2.
SELECTING
THE
INSTALLATION
SITE
2-1. Outdoor Unit
AVOID:
●
heat sources, exhaust fans, etc.
●
damp, humid or uneven locations
●
indoors (no-ventilation location)
DO:
●
choose a place as cool as possible.
●
choose a place that is well ventilated and outside air
temperature does not exceed maximum 46°C constantly.
●
allow enough room around the unit for air intake/
exhaust and possible maintenance. For the details, see the
following installation examples (1) to (10).
●
provide a solid base (concrete block, 10 × 40 cm beams or
equal), a minimum of 15 cm above ground level to reduce
humidity and protect the unit against possible water damage
and decreased service life.
●
use lug bolts or equal to bolt down unit, reducing vibration
and noise.
Installation space for outdoor unit
Install the outdoor unit at a place where there is enough space
for ventilation. Otherwise the unit may not operate properly.
Required space for installation shows in the descriptions (1)
to (10). For other installation examples, refer to the Technical
Data.
It is possible to reduce the space between the air discharge
outlet and an obstacle by installing the field supplied air-
discharge chamber for top discharge. See the note in the figure.
When installing the air-discharge chamber for top discharge,
keep the unit above free from obstruction.
(1)
Obstructions on the rear side (Front side, left side, right
side and above the unit are opened).
(2)
Obstructions on the left side, right side and rear side (Front
side and above the unit are opened).
(3)
Obstructions on the front side (Rear side, left side, right
side and above the unit are opened).
(4)
Obstructions on the front side and rear side (Left side, right
side and above the unit are opened).
(5)
Obstructions on the rear side and above the unit (Left side,
right side and front side are opened).
The air-discharge chamber can not be used.
Exhaust fan
Heat source
Hot air
Out- door unit
Air intake
Air intake
Air discharge
A
ir
discharge
(4 pieces)
Anchor bolts
Min. 15cm
150 mm
or more
200 mm
or more
250 mm or more
150 mm or more
500 mm
or more
1000 mm
or more *
150 mm
or more
* When using the air-discharge chamber : 500 mm or more
300 mm
or more
150 mm or more
00̲280220̲2WAY̲Eng.indb 18
2016/06/09 18:10:59
00̲280434̲Mini̲VRF̲Mentsuke.indb 11
00̲280434̲Mini̲VRF̲Mentsuke.indb 11
2016/06/16 11:37:35
2016/06/16 11:37:35
