Mitsubishi Electric EHSD-MED Service Manual page 18

Option2: Hydrobox powered by independent source
<1 phase>
Affix label B that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Power supply
~/N 230 V 50 Hz
<3 phase>
Affix label B that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Power supply
3N~ 400 V 50 Hz
Description
Booster heater (Primary circuit)
Hydrobox power supply
Hydrobox input capacity
Main switch (Breaker)
Hydrobox power supply
Hydrobox power supply earth
Wiring No.
× size (mm²) Hydrobox - Outdoor unit
Hydrobox - Outdoor unit earth
Hydrobox L - N
Circuit
Hydrobox - Outdoor unit S1 - S2
rating
Hydrobox - Outdoor unit S2 - S3
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 line longer than power cables.
4. Please keep enough output capacity of power supply for each heater. Insufficient power supply capacity might cause chattering.
OCH712C
Earth
leakage
Power supply
circuit
~/N 230 V 50 Hz
breaker
*1, *2
Earth
Wiring
leakage
circuit
circuit
breaker or
breaker
Isolating
switch
*1, *2
Power supply
~/N 230 V 50 Hz
<Figure 7.3>
Electrical connections 1 phase
Description Power supply
Booster heater ~/N 230 V 50 Hz
Earth
leakage
Power supply circuit
~/N 230 V 50 Hz
breaker
*1, *2
Earth
Wiring
leakage
circuit
circuit
breaker or
breaker
Isolating
switch
*1, *2
Power supply
3~ 400 V 50 Hz (E***-YM9*D)
3~ 230 V 50 Hz (EH**-TM9*D)
<Figure 7.4>
Electrical connections 3 phase
Power supply
3~ 400 V 50 Hz
3~ 230 V 50 Hz
~/N 230 V 50 Hz
16 A
*2
2 × Min. 1.5
1 × Min. 1.5
2 × Min. 0.3
*3
—
230 VAC
*4
—
*4
24 VDC
*4
Hydrobox
TB1
Wiring
circuit
L
breaker or
Isolating
N
switch
Outdoor unit
L S1
S1
To control
N S2
S2
board
S3
S3
ECB1
Wiring
For
circuit
L
booster
breaker or
heater
Isolating
N
switch
Capacity Breaker Wiring
2 kW 16 A 2.5 mm²
*2
6 kW 32 A 6.0 mm²
*2
Hydrobox
TB1
Wiring
circuit
L
breaker or
Isolating
N
switch
To control
Outdoor unit
board
L1 S1
S1
S2
L2
S2
L3 S3
S3
N
ECB1
Wiring
L1
circuit For
breaker or L2
booster
Isolating heater
L3
switch
Capacity Breaker
9 kW 16 A
*2
9 kW 32 A
*2
If the installed earth leakage circuit breaker does not have an
*1.
over-current protection function, install a breaker with that func-
tion along the same power line.
A breaker with at least 3.0 mm contact separation in each pole
*2.
shall be provided. Use earth leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all ac-
tive phase conductors of the supply.
Max. 120 m
*3.
The values given in the table above are not always measured
*4.
against the ground value.
18
Wiring
2.5 mm²
6.0 mm²