Mitsubishi Electric Ecodan EHSC series Installation Manual page 28

4
Installation
<3 phase>
Power
supply
Earth
3N~
leakage
400V
circuit
50Hz
breaker
*1
*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 Affix label B that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Description
Booster heater (Primary circuit)
Hydrobox power supply
Hydrobox input capacity
Main switch (Breaker)
Hydrobox power supply
Hydrobox power supply earth
Hydrobox - Outdoor unit
Hydrobox - Outdoor unit earth
Hydrobox L - N
Hydrobox - Outdoor unit S1 - S2
Hydrobox - Outdoor unit S2 - S3
*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 flexible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed flexible 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.
27
Power
supply
Earth
~/N
leakage
230V
breaker or
circuit
50Hz
breaker
*1
Outdoor unit
L1
Wiring
L2
circuit
breaker or
L3
Isolating
switch
N
Power
supply
3~
400V
50Hz
<Figure 4.5.9>
Electrical connections 3 phase
Power supply Capacity
3~ 400V 50Hz 9 kW
~/N 230 V 50 Hz
*1
*2
*3
*3
*3
Hydrobox
TB1
Wiring L
circuit
N
Isolating
switch
To control
board
S1
S1
S2
S2
S3
S3
ECB1
For
booster
L1
Wiring heater
circuit (Primary circuit)
L2
breaker or
Isolating
L3
switch
Breaker Wiring
16 A *1 2.5 mm²
16 A
2 × Min. 1.5
1 × Min. 1.5
2 × Min. 0.3
—
230V AC
—
24V DC