Mitsubishi Electric EHST20-Serie Installationshandbuch Seite 20

4
installation
<3 phase>
Power
supply
3N~
400V
50Hz
* Affix label A that is included with the manuals near each wiring diagram for cylinder unit and outdoor units.
description
Booster heater (Primary circuit)
Immersion heater (DHW tank)
Cylinder unit - Outdoor unit
Cylinder unit - Outdoor unit earth
Cylinder unit - Outdoor unit S - S2
Cylinder unit - Outdoor unit S2 - S3
*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
*3. 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.
9
Wiring
Earth
circuit
leakage
breaker
or
breaker
Isolating
switch
Power
Supply
3~
400V
50Hz
Power
Supply
~/N
230V
50Hz
<Figure 4.6.2>
Electrical connections 3 phase
Power supply Capacity (indoor unit ref.) Breaker
3~ 400V 50Hz
3kW (E******-VM*H*)
~/N 230 V 50 Hz
*2
*2
*3
*3
Cylinder unit
TB1
L
Outdoor unit
N
To control
board
L1
S1
S1
L2
S2
S2
L3
S3 S3
N
ECB1
ELB for
Wiring L1
booster
circuit
heater
L2
breaker
(Primary circuit)
or
L3
Isolating
switch
ECB2
ELB for
Wiring
L
immersion
circuit
heater
breaker
N
or (DHW tank)
Isolating
switch
Wiring
9 kW 6 A *
6 A *
3 × 1.5 (polar)
 × Min. .5
AC230V
DC24V
2.5 mm²
2.5 mm²