Installation manual

L1
L2
S1
S2
S3
S1
S2
S3
TB1
L2
L3
ECB1
L
N
ECB2
N
L3
L1
L
N
Power
supply
3N~
400 V
50 Hz
Earth
leakage
circuit
breaker
*1
Wiring
circuit
breaker
or
Isolating
switch
Wiring
circuit
breaker
or
Isolating
switch
Earth
leakage
circuit
breaker
*1
Power
supply
~/N
230 V
50 Hz
Power
supply
~/N
230 V
50 Hz
Outdoor unit
Cylinder unit
Wiring
circuit
breaker
or
Isolating
switch
Wiring
circuit
breaker
or
Isolating
switch
Power supply
3~ 400 V 50 Hz (EH*T20*-YM*B)
3~ 230 V 50 Hz (EH*T20*-TM*B)
20
Installation
4
GB
<3 phase>
<Figure 4.6.5>
Electrical connections 3 phase
Description Power supply Capacity (Indoor unit Ref.) Breaker Wiring
Booster heater (Primary circuit)
3~ 400 V 50 Hz 9 kW 16 A *1 2.5 mm²
3~ 230 V 50 Hz 9 kW 32 A *1 6.0 mm²
Immersion heater (DHW tank) ~/N 230 V 50 Hz 3 kW 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 *3 230 V AC
Cylinder unit - Outdoor unit S1 - S2 *3 —
Cylinder unit - Outdoor unit S2 - S3 *3 24 V DC
*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.
Note: 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 exible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed exible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. Please keep enough output capacity of power supply for each heater. The lack of the power supply capacity might cause
chattering.
For
booster
heater
(Primary circuit)
For
Immersion
heater
(DHW tank)
To control
board
*1 If the installed earth leakage circuit breaker does not have an over-current protection function, install a breaker with that function
along the same power line.
*2 Afx label B that is included with the manuals near each wiring diagram for cylinder unit and outdoor units.