S1
S2
S3
L
N
L
N
CN01
CN01
CN01
CN01
S1
S2
S3
L
N
S1
S2
S3
S1
S2
S3
TB1
L
N
L1
L2
S1
S2
S3
S1
S2
S3
TB1
L2
L3
ECB1
N
L3
L1
L
N
17
To control
board
Outdoor unit
Wiring
circuit
breaker or
Isolating
switch
Earth
leakage
circuit
breaker
*
1,
*
2
Power
supply ~/
N
230 V
50 Hz
Power
supply ~/
N
230 V
50 Hz
Earth
leakage
circuit
breaker
*
1,
*
2
Wiring
circuit
breaker or
Isolating
switch
Hydrobox
Initial settings
(Power supplied
by outdoor unit)
Modified settings
(Separate power
supply to
the hydrobox)
BLACK
BLACK
YELLOW
BLACK
YELLOW
YELLOW
YELLOW
BLACK
Hydrobox
control board
White
White
Earth
leakage
circuit
breaker
*
1,
*
2
Outdoor unit
Power
supply
3N~
400 V
50 Hz
Wiring
circuit
breaker or
Isolating
switch
To control
board
For
booster
heater
(Primary circuit)
Hydrobox
Wiring
circuit
breaker or
Isolating
switch
Power
supply ~/
N
230 V
50 Hz
Earth
leakage
circuit
breaker
*
1,
*
2
Wiring
circuit
breaker or
Isolating
switch
Power supply
3~
400 V,
50 Hz (E*SE-
Y
M9EC)
Hydrobox
control board
Option2: Hydrobox powered by independent source
If the hydrobox and outdoor units have separate power supplies, the following requirements
MUST be carried out:
• Change connector connections in hydrobox control and electrical box (see Figure 7-3).
• Turn the outdoor unit DIP switch SW8-3 to ON.
• Turn on the outdoor unit BEFORE the hydrobox.
• Power by independent source is not available for particular models of outdoor unit
model.
For more detail, refer to the connecting outdoor unit installation manual.
<1 phase>
<Figure 7-4>
Electrical connections 1 phase
<Figure 7-3>
<3 phase>
<Figure 7-5>
Electrical connections 3 phase
Hydrobox power supply
~/N 230 V 50 Hz
Hydrobox input capacity
Main switch (Breaker)
*
2
16 A
Wiring
Wiring
No.
×
size
(mm²)
Hydrobox power supply
2 × Min. 1.5
Hydrobox power supply earth
1 × Min. 1.5
Hydrobox - Outdoor unit
*
3
2 × Min. 0.3
Hydrobox - Outdoor unit earth
—
Circuit
rating
Hydrobox L - N
*
4
230 V AC
Hydrobox - Outdoor unit S1 - S2
*
4
—
Hydrobox - Outdoor unit S2 - S3
*
4
24 V DC
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.
*
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
Maximum 120 m
*
4
The values given in the table above are not always measured
against the ground value.
Affix label B that is included with the manuals near
each wiring diagram for hydrobox and outdoor units.
Affix label B that is included with the manuals near
each wiring diagram for hydrobox and outdoor units.
Description
Power supply Capacity Breaker Wiring
Booster heater
(Primary circuit)
3~ 400 V
50 Hz
9 kW
16 A
*
2
2.5 mm²
*
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.
*
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.
OCH590B
