4
5
L1
L2
S1
S2
S3
TB1
L2
L3
ECB1
L
N
ECB2
N
L3
L1
S1
S2
S3
L
N
Power
supply
N~
400V
50Hz
Earth
leakage
circuit
breaker
*1
Wiring
circuit
breaker
or
Isolating
switch
Power
supply
~
400V
50Hz
Power
supply
~/N
0V
50Hz
Wiring
circuit
breaker
or
Isolating
switch
Wiring
circuit
breaker
or
Isolating
switch
For
booster
heater
(Primary circuit)
For
Immersion
heater
(DHW tank)
To control
board
Outdoor unit
Cylinder unit
<3 phase>
<Figure 7-2>
Electrical connections phase
Description
Power supply
Capacity (Indoor unit Ref.) Breaker
Wiring
Booster heater (Primary circuit)
3~ 400V 50Hz
9 kW
16 A *1
.5 mm²
Immersion heater (DHW tank)
~/N 230 V 50 Hz
kW (EH*T0*-YM9H*)
16 A *1
.5 mm²
Wiring
Wiring No. × s
ize
(m
m
²)
Cylinder unit - Outdoor unit
*
× 1.5 (polar)
Cylinder unit - Outdoor unit earth
*
1 × Min. 1.5
Circuit
rating
Cylinder unit - Outdoor unit S1 - S
*
0V AC
Cylinder unit - Outdoor unit S - S
*
4V DC
*1. 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.
*2. Max. 45 m
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.
Note:
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.
*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.
*2 Affix label A which is included with the manuals near each wiring diagram for cylinder unit and outdoor
OCH531
Содержание ecodan EHPT20X- VM2HB
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