16
6-1. Installation Site Selection
Maximum Allowable Tubing Length(L) and
Elevation Difference(H).
The Multi-Split System outdoor unit should be installed as close to
the indoor units as possible. Maximum allowable length of the
refrigerant tubing and elevation difference between outdoor and
indoor units are shown in Fig.1 and Table 1.
Table.1
* If total tubing length becomes 7.5 to 20 m (max.), charge
additional refrigerant (R22) by 25 g/m.
No additional charge of compressor oil is necessary.
6-2. Place and Space for Installation
Avoid:
●
heat source, exhaust fans, etc. (Fig. 2)
●
direct sunlight
●
damp, humid, or uneven locations.
Do:
●
choose a place as cool as possible.
●
choose a place that is well ventilated.
●
allow enough room around the unit for air intake
/exhaust and possible maintenance. (Fig. 3)
●
provide a solid base (concrete block, 10 x 40 cm
beams or equal), a minimum of 10 cm above ground level to
reduce humidity and protect the unit against possible water
damage and decreased service life. (Fig. 4)
●
use lug (anchor) bolts or equal to bolt down the unit, reducing
vibration and noise. (Fig. 4)
IMPORTANT
6. INSTALLATION INSTRUCTIONS
Max allowable
tubing length
at shipment.(m)
Limit of
tubing length(L).
(m)
7.5
20
7
Limit of elevation
difference(H).
(m)
25
Required amount
of additional
refrigerant*(g/m).
INDOOR
UNIT
Tubing length (L)
OUTDOOR
UNIT
Less than elevation
difference (H) between
the 2 units
Fig.1
Outdoor unit
Hot air
Heat source
Exhaust fan
Fig. 3
Fig.2
Min. 10 cm
Air discharge
Min.
10 cm
Min.
50 cm
Valve
side
Min. 60 cm
Air intake
2 m
2 m
Ground
Obstacle
Obstacle above
Air discharge
Fig.3
Fig. 5 - B
Min. 10 cm
Anchor bolts
(4 pcs.)
Fig.4
