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
L2
L1
16
FIELD WIRING
7
Breaker abbreviation
Meaning
ECB1
Earth leakage circuit breaker for booster heater
TB1
Terminal block 1
Earth
leakage
circuit
breaker
*
1,
*
2
Outdoor unit
To control
board
Hydrobox
Wiring
circuit
breaker or
Isolating
switch
Power
supply
~/N
230 V
50 Hz
Earth
leakage
circuit
breaker
*
1,
*
2
Outdoor unit
Power supply
3~
400 V,
50 Hz (E*SE-
Y
M9EC
)
Wiring
circuit
breaker or
Isolating
switch
To control
board
For
booster
heater
(Primary circuit)
Hydrobox
Wiring
circuit
breaker or
Isolating
switch
Power
supply
3N~
400 V,
50 Hz
Option 1: Hydrobox powered via outdoor unit
<1 phase>
<Figure 7-1>
Electrical connections 1 phase
*
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>
<Figure 7-2>
Electrical connections 3 phase
Wiring
Wiring
No.
×
siz
e
(m
m
²)
Hydrobox - Outdoor unit
*
3
3 × 1.5 (polar)
Hydrobox - Outdoor unit earth
*
3
1 × Min. 1.5
Circuit
rating
Hydrobox - Outdoor unit S1 - S2
*
4
230 V AC
Hydrobox - Outdoor unit S2 - S3
*
4
24 V DC
*
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 45 m
If 2.5 mm² is used, maximum 50 m.
If 2.5 mm² is used and S3 is separated, maximum 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.
Affix label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Affix label A 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.
OCH590B