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<3 phase>
Affix label A that is included with the manuals near each
wiring diagram for cylinder unit and outdoor units.
Power supply
3N~ 400 V 50 Hz
Description
Booster heater (Primary circuit)
Immersion heater (DHW tank)
Cylinder unit - Outdoor unit
Cylinder unit - Outdoor unit earth
Cylinder unit - Outdoor unit S1 - S2
Cylinder unit - Outdoor unit S2 - S3
Max. 45 m
*3.
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
The values given in the table above are not always measured against the ground value.
*4.
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.
OCH714B
Wiring
Earth
circuit
leakage
breaker
circuit
or
breaker
Isolating
*1, *2
switch
Power supply
3~ 400 V 50 Hz (E**T***-YM9*D)
3~ 230 V 50 Hz (E**T***-TM9*D)
Power supply
~/N 230 V 50 Hz
Electrical connections 3 phase
Power supply
Capacity (Indoor unit Ref.) Breaker
3~ 400 V 50 Hz
3~ 230 V 50 Hz
~/N 230 V 50 Hz
*3
*3
*4
*4
Cylinder unit
TB1
L
Outdoor unit
N
To control
board
L1
S1
S1
L2
S2
S2
L3
S3
S3
N
ECB1
Wiring
L1
circuit
For
breaker
booster
L2
or
heater
Isolating
(Primary circuit)
L3
switch
ECB2
Wiring cir-
For
cuit breaker
L
Immersion
or
heater
Isolating
N
(DHW tank)
switch
<Figure 7.2>
*2
9 kW
16 A
9 kW
32 A
*2
*2
3 kW
16 A
3 × 1.5 (polar)
1 × Min. 1.5
230 VAC
24 VDC
22
If the installed earth leakage circuit
*1.
breaker does not have an over-
current protection function, install a
breaker with that function along the
same power line.
A breaker with at least 3.0 mm
*2.
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.
Wiring
2.5 mm²
6.0 mm²
2.5 mm²
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