11
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
Indoorunit"
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 3-pole type.
8. Electrical work
Power supply wiring (Supply power separately to branch box
and outdoor unit)
• Install an earth line longer than other cables.
• Power supply cords of appliance shall not be lighter than design
45IEC57 or
7IEC57, 45 IEC 53 or 7 IEC 53.
• A switch with at least 3 mm, 1/8 inch contact separation in each pole shall be
provided by the air conditioner installation.
[Fig. 8-10]
A
Ground-fault interrupter
B
Local switch/Wiring breaker
C
Branch Box
D
Pull box
D
C
TB2B
TB5
S
M1
L N
M2
A
B
220/230/240 V
Fig. 8-10
Total operating current of the indoor unit
Minimum wire thickness (mm²/AWG)
Breaker for wiring
(NFB)
Ground-fault interrupter *1
Main cable
Branch
Ground
Capacity
Fuse
F0 = 15A
or less *
.1/14
.1/14
.1/14
15
15
15
15A current sensitivity *3
F0 = 0A or less *
3.3/1
3.3/1
3.3/1
0
0
0
0A
current sensitivity *3
F0 = 30A
or less *
5.3/10
5.3/10
5.3/10
30
30
30
30A 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.
* Please take the larger of F1 or F as the value for F0.
F1 = T
otal operating maximum current of the indoor units × 1.
F = (V1/C)
Connect to Branch box (PAC-MK•BC)
Indoor unit
V1
V
Type 1
SEZ-KD•VA, PCA-RP•KAQ, PLA-ZRP•BA(.UK)
19.8
.4
T
ype
PEAD-RP•JAQ(L).UK
6.9
Type 3
MLZ-KA•VA, SLZ-KA•VAQ(L)3
9.9
Type 4
MSZ-FH•VE, MSZ-SF•VE, MSZ-EF•VE, MSZ-SF•VA
6.8
Type 5
MFZ-KJ•VE
7.4
Type 6
Branch box (PAC-MK•BC)
5.1
3.0
C : Multiple of tripping current at tripping time 0.01s
Please pick up "C" from the tripping characteristic of the breaker.
*Condition Branch Box × + SEZ-KD•V
A × 5, C=8 (refer to right sample chart)
F = 5.1 × /8 + 19.8 × 5/8
= 14.9
→ 16A breaker (Tripping current = 8 × 16A at 0.01s)
*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
/AWG)
V3
V
.1/14
48
Indoor unit
.4
3.3/1
56
Branch Box
3.0
5.3/10
66
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
Connect to Connection kit (PAC-LV11M)
Indoor unit
V1
V
Type 1
MSY-EF•VE, MSY-GE•VA, MSY-GH, MSZ-GE•VA,
MSZ-SF•VA, MSZ-SF•VE,MSZ-EF•VE, MSZ-FH•VE
6.8
.4
T
ype
MFZ-KJ•VE
7.4
Type 3 Connection kit (PAC-LV11M)
3.5
Indoor unit
V1
V
Type 1
PMFY-VBM, PLFY-VBM, PEFY-VMS1, PCFY-VKM
PKFY-VHM, PKFY-VKM, PFFY-VLRMM, PFFY-VKM
19.8
.4
T
ype
PLFY-VCM
9.9
Type 4 PKFY-VBM
3.5
Type 5 PEFY-VMA
38.0 1.6
Type 6
PLFY-VLMD, PEFY-VMH,PEFY-VMR, PDFY-VM
PFFY-VLEM, PFFY-VLRM
0
0