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Mitsubishi Electric Hydrobox EHSC Series Installation Manual page 18

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4
Installation
Hydrobox powered via outdoor unit
(If you want to use independent source, go to the Mitsubishi website.)
<1 phase>
Affix label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Power supply
~/N 230 V 50 Hz
en
*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.
<3 phase>
Affix label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Power supply
3N~ 400 V 50 Hz
*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.
Hydrobox - Outdoor unit
Hydrobox - Outdoor unit earth
Hydrobox - Outdoor unit S1 - S2
Hydrobox - Outdoor unit S2 - S3
*2. 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.
*3. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*4. 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. Insufficient power supply capacity might cause chattering.
17
Earth
Wiring
leakage
circuit
circuit
breaker or
breaker
Isolating
switch
*1, *2
Power supply
~/N 230 V 50 Hz
<Figure 4.4.2>
Electrical connections 1 phase
Description
Power supply
Booster heater (Primary circuit)
~/N 230 V 50 Hz
Earth
Wiring
leakage
circuit
circuit
breaker or
breaker
Isolating
switch
*1, *2
Power supply
3~ 400 V 50 Hz
<Figure 4.4.3>
Electrical connections 3 phase
Description
Power supply
Booster heater (Primary circuit)
*3
3 × 1.5 (polar)
*3
1 × Min. 1.5
*4
230 V AC
*4
24 V DC
Outdoor unit
L
S1
N
S2
S3
Wiring
circuit
breaker or
Isolating
switch
Capacity
Breaker
2 kW
16 A *2
6 kW
32 A *2
Outdoor unit
L1
S1
L2
S2
L3
S3
N
Wiring
circuit
breaker or
Isolating
switch
Capacity
Breaker
3~ 400 V 50 Hz
9 kW
16 A *2
Hydrobox
TB1
L
N
To control
board
S1
S2
S3
ECB1
For
L
booster
heater
N
(Primary circuit)
Wiring
2.5 mm²
6.0 mm²
Hydrobox
TB1
L
N
To control
board
S1
S2
S3
ECB1
L1
For
L2
booster
heater
L3
(Primary circuit)
Wiring
2.5 mm²

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