43
This power circuit must be protected with the required safety devices according to local laws and regulations.
Select the power cable in accordance with relevant local laws and regulations. For the maximum running current of the backup
heater, refer to the table below.
Door 2: electrical parts of the hydraulic compartment, backup heater: XT5
（
3-phase
）
/XT4(1-phase)
LPS
FUSE
C
B
A
XT5
L1 L2 L3
L N
LPS
XT4
L
N
Wiring size(mm
2
)
Unit(kW)
Backup heater
nominal voltage
Minimum circuit
amps (MCA)
Maximum
overcurrent
protector(MOP)
4
3
220-240VAC
1-phase
2.5
4.5
380-415VAC
14.3
6.0
20
10
3-phase
Backup heater capacity
POWER SUPPLY FOR ELECTRIC HEATER
Be sure to use a dedicated power circuit for the backup heater. Never use a power circuit shared by another appliance.
Use the same dedicated power supply for the unit, backup heater and booster heater (domestic hot water tank).
CAUTION
The ground fault circuit interrupter must be a high-speed type breaker of 30 mA (<0.1 s).
NOTE
9.7.5 Connection of the backup heater power supply(This section is intended only for models
that contain backup heater.)
Power circuit and cable requirements
Stated values are maximum values (see electrical data for exact values).
OUTOOOR UNIT
POWER SUPPLY
OUTOOOR UNIT
POWER SUPPLY
1-phase
3-phase
L
N
L N
LPS
FUSE
XT1
LPS
FUSE
L1
N
L2 L3
C N
B
A
XT1
12~16
5/7/9
12~16
Unit(kW)
Maximum
overcurrent
protector(MOP)
20
30
15
Wiring size(mm
2
)
4
6
4
1-phase
3-phase
The ground fault circuit interrupter must be a high-speed type breaker of 30 mA (<0.1 s).
NOTE
V.1
Summary of Contents for ETH50VMR
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