Installation and Maintenance
10.5 Electrical installation
●
Use an ELB (Electric Leakage Breaker). If not used, it might cause an electric shock or
a fire.
●
Do
not
operate
the
system
until
all
the
check
points
have
been
cleared
.
20
Model
Capacity(Btu/h)
Power
Supply
ELB
Power Source
Cable Size
Transmitting Cable
Size
Nominal
Current(A)
Nominal
Sensitive
Current (mA)
En60 335-1
En60 335-1
18K
220-240V ~,50Hz
20
30
3
2 5mm
2
× .
4
1 5mm
2
× .
24K
220-240V ~,50Hz
32
30
3
2 5mm
2
× .
4
1 5mm
2
× .
36K
220-240V ~,50Hz
40
30
3
4 0mm
2
× .
4
1 5mm
2
× .
42K/48K/55K
380-415V 3N~,50Hz
32
30
5
2 5mm
2
× .
4
1 5mm
2
× .
Max. Running Current(A):REFER TO NAMEPLATE
NOTES
:
1
)
Follow
local
codes
and regulations when selecting field wires, and all the above are the minimum size.
2
)
The wire sizes marked in the table are selected at the maximum current of the unit according to the
European Standard , EN60335-1. Use the wires which are not lighter than the ordinary polychloroprene
sheathed flexible cord (code designation H07RN-F) .
When
connecting
the terminal block using flexible cord, make sure to use the round crimp-style terminal
for connection to the power supply terminal block.
Place the round crimp-style terminals on the wires up to the covered
part and secure in place.
When
connecting
the terminal block using a single core
wire, be sure to perform curing.
3
)
When transmitting cable length is more than 15 meters, a larger wire size should be selected.
4
)
Use a shielded cable for the transmitting circuit and connect it to ground .
Flexible cord
covered part
Round crimp style terminal
-
Terminal
Single core wire
5
)
In
the
case
that
power
cables
are
connected
in
series
,
add
each
unit
maximum
current
and
select
wires
below
.
*
In
the
case
that
current
exceeds
63A
,
do
not
connect
cables
in
series
.
Current i(A)
2
Wire Size(mm)
i
6
≤
0 75
.
6
i
10
＜≤
1
10
i
16
＜≤
1 5
.
16
i
25
＜≤
2 5
.
25
i
32
＜≤
4
32
i
40
＜≤
6
40
i
63
＜≤
10
63
i
＜
*
Selection According to EN60335-1
(A) Check to ensure that the insulation resistance is more than 2 M
Ω
, by measuring the resistance
between ground and the terminal of the electrical parts. If not, do not operate the system until the
electrical leakage is found and repaired.
(B) Check to ensure that the stop valves of the outdoor unit are fully opened and then start the system.
