57
12.2 Outdoor Unit
12.2.1 Select the Best Location
If an awning is built over the unit to prevent direct sunlight or rain, be careful that heat radiation from the
condenser is not obstructed.
There should not be any animal or plant which could be affected by hot air discharged.
Keep the spaces indicated by arrows from wall, ceiling, fence or other obstacles.
Do not place any obstacles which may cause a short circuit of the discharged air.
If piping length is over the [piping length for additional gas], additional refrigerant should be added as shown in
the table.
Table A
Model
Horse
Power
(HP)
Piping size
Std.
Length
A
(m)
Max
Elevation
B
(m)
Min.
Piping
Length
(m)
Max.
Piping
Length
(m)
Additional
Refrigerant
(g/m)
Piping
Length for
add. gas
(m)
Max.
Refrigerant
Charge
(kg)
Indoor A
min
for
mini cassette
(m
2
)
Indoor A
min
for
ducted
(m
2
)
Indoor A
min
for
floor console
(m
2
)
Gas Liquid
Z25**** 1.0HP
9.52
mm
(3/8
")
6.35
mm
(1/4
")
5
15 3 20 10 7.5 1.05 Not applicable (*) Not applicable (*) Not applicable (*)
Z35**** 1.5HP 15 3 20 10 7.5 1.10 Not applicable (*) Not applicable (*) Not applicable (*)
Z50**** 2.0HP
12.7
mm
(1/2
")
20 3 30 15 7.5 1.44 Not applicable (*) Not applicable (*) Not applicable (*)
Z60**** 2.25HP 20 3 30 15 7.5 1.51 Not applicable (*) Not applicable (*) –––
(*) Systems with total refrigerant charge, m
c
, lower than 1.84kg are not subjected to any room area requirements.
Example: For Z25****
If the unit is installed at 10 m distance, the quantity of additional refrigerant should be 25 g .... (10-7.5) m × 10 g/m =
25 g.
A
min
= (m
c
/ (2.5 × (LFL)
(5/4)
× h
0
))
2
** not less than safety factor margin
A
min
= Required minimum room area, in m
2
m
= Refrigerant charge in appliance, in kg
LFL
= Lower flammability limit (0.307 kg/m
)
h
0
= Installation height of the appliance : (2.2m for mini cassette & ducted)
(0.6m for floor console)
SF
= Safety factor with a value of 0.75
** The required minimum room area, A
min
, shall also be governed by the safety factor margin formula below :
A
min
= m
c
/ (SF × LFL × h
0
)
The higher value shall be taken when determining the room area.
•
This illustration is for explanation purposes only.
It is advisable to avoid more
than 2 blockage directions.
For better ventilation &
multiple-outdoor installation,
please consult authorized
dealer/specialist.
Installation parts you
should purchase (
)
Power supply cable (
)
Connection cable (
)
1/4" Liquid side piping (
)
Gas side piping (
)
Additional drain hose (
)
100 mm
or more
300 mm
or more
300 mm
or more
1000 mm
or more
100 mm
or more
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