1
8. Electrical work
䠆
Power supply from Outdoor unit
Power supply
䠆
Supply power separately to branch box and outdoor unit
Power supply
L
N
Isolator (Switch)
L
N
Outdoor unit
L
N
B1
B2
L
N
Branch box
S1
S2
S3
S1
S2
S3
"A
-
control
Indoor unit"
3 pole isolator
(Switch)
2 pole isolator
(Switch)
L
N
Isolator (Switch)
L
N
Branch box
S1
S2
S3
S1
S2
S3
"A
-
control
Indoor unit"
3 pole isolator
(Switch)
L
N
Caution:
After using the isolator, be sure to turn off and on the main power supply to reset the system. Otherwise, the outdoor unit may not be able to detect the
branch box(es) or indoor units.
Warning:
In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power
line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals when the power
is energized. If isolator should be used between outdoor unit and branch box/indoor unit and branch box, please use 2-pole or 3-pole type, as shown in the
following figures.
Condition: Branch Box × + SEZ-M
•
DA × 5, C=8 (refer to right sample chart)
F = 5.1 × /8 + 19.8 × 5/8
= 13.65
*3 Current sensitivity is calculated using the following formula.
G1 = V + V3 × (Wire length[km])
G1
Current sensitivity
30 or less
30 mA 0.1sec or less
100 or less
100 mA 0.1sec or less
Wire thickness (mm
)
V3
1.5
48
.5
56
4.0
66
When connecting 3 units of the PLA-RP series respectively to the Branch Box
1.5mm
using 0m of wiring and connecting the Branch Box and PEFY-VMA to
a single breaker using wiring totaling 100m in length;
G1 = .4 × 3 + 3 + 1.6 + 48 × 0.0 × 3 + 56 × 0.1
= 0.8
→ 30 mA Current sensitivity
*5 When the ecodan is connected, the master controller (G-50A etc.) cannot be connected.
6000
600
60
10
Tripping Time [s]
1
0.1
0.01
1
2
Rated Tripping current (x)
3 4
6 8
C
10
20
SAMPLE
Sample chart
Total operating current of the indoor unit
Minimum wire thickness (mm²)
Capacity (A)
Fuse (A)
Breaker for wiring
(NFB)
Ground-fault interrupter *1
Main cable
Branch
Ground
F0 = 16A or less *
1.5
1.5
1.5
16
16
0
0A current sensitivity *3
F0 = 5A or less *
.5
.5
.5
5
5
30
30A current sensitivity *3
F0 = 3A or less *
4.0
4.0
4.0
3
3
40
40A current sensitivity *3
Apply to IEC61000-3-3 about max. permissive system impedance.
*1 The Ground-fault interrupter should support inverter circuit.
The Ground-fault interrupter should combine using of local switch or wiring breaker.
* Take the larger of F1 or F as the value for F0.
F1 = Total operating maximum current of the indoor units × 1.
F = (V1/C)
Connect to Branch box (PAC-MK•BC(B))
Indoor unit
V1
V
Type 1
SEZ-KD•VAQ(L), SEZ-M•DA(L), PCA-RP•KAQ, PCA-M•KA,
SLZ-KF•VA, SLZ-M•FA, PLA-RP•BA, PLA-RP•EA
19.8
.4
Type
PEAD-RP•JAQ(L), PEAD-M•JA(L)
6.9
Type 3
MLZ-KA•VA
9.9
Type 4
MSZ-FH•VE, MSZ-GF•VE, MSZ-SF•VE, MSZ-EF•VE,
MSZ-SF•VA, MSZ-AP•VF
6.8
Type 5
MFZ-KJ•VE, MSZ-LN•VG, MSZ-AP•VG, MLZ-KP•VF
7.4
Type 6
Branch box (PAC-MK•BC(B))
5.1
3.0
Type 7
ecodan C generation*5
5.1
5.0*
*This value may increase due to a locally connected actuator.
C : Multiple of tripping current at tripping time 0.01s
Please pick up "C" from the tripping characteristic of the breaker.
► As for types not listed in the left-side table for indoor units connected
to the branch box, refer to the attached sheet, “Criteria for selecting
breaker when branch box is fed from separate power source”.
► As to coefficient (V1, V2) of the LEV kit connected indoor unit and City
Multi indoor unit, refer to the outdoor unit INSTALLATION MANUAL.
