Installation manual
Earth
leakage
breaker
Wiring
circuit
breaker
or
Isolating
switch
L1
L2
S1
S2
S3
Outdoor unit
S1
S2
S3
TB1
L2
L3
ECB1
Wiring
circuit
breaker
or
Isolating
switch
L
N
ECB2
Wiring
circuit
breaker
or
Isolating
switch
To control
board
ELB for
booster
heater
(Primary circuit)
ELB for
immersion
heater
(DHW tank)
Cylinder unit
N
L3
L1
L
N
Earth
leakage
breaker
Wiring
circuit
breaker
or
Isolating
switch
Power
supply
~/N
230V
50Hz
Power
supply
3N~
400V
50Hz
Power
supply
~/N
230V
50Hz
Power
supply
3~
400V
50Hz
19
Installation
4
<3 phase>
<Figure 4.6.5>
Electrical connections 3 phase
Description Power supply Capacity (Indoor unit Ref.) Breaker Wiring
Booster heater (Primary circuit) 3~ 400V 50Hz 9 kW 16 A *1 2.5 mm²
Immersion heater (DHW tank) ~/N 230 V 50 Hz 3kW (E******-VM*H*) 16 A *1 2.5 mm²
Cylinder unit power supply ~/N 230 V 50 Hz
Cylinder unit input capacity
Main switch (Breaker)
*1
16 A
Wiring
Wiring No.
× size (mm²)
Cylinder unit power supply 2 × Min. 1.5
Cylinder unit power supply earth 1 × Min. 1.5
Cylinder unit - Outdoor unit *2 2 × Min. 0.3
Cylinder unit - Outdoor unit earth —
Circuit
rating
Cylinder unit L - N *3 AC230V
Cylinder unit - Outdoor unit S1 - S2 *3 —
Cylinder unit - Outdoor unit S2 - S3 *3 DC24V
*1. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the supply.
*2. Max. 120 m
*3. The values given in the table above are not always measured against the ground value.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2. Indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed fl exible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed fl exible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
* Affi x label B that is included with the manuals near each wiring diagram for cylinder unit and outdoor units.