Mitsubishi Electric Ecodan EHST20 serie Para El Instalador página 25

4
installation
<3 phase>
Power
supply
3N~ Earth
400V
leakage
50Hz circuit
breaker
*1
*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 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 S1 - 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.
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. the lack of the power supply capacity might cause
chattering.
Outdoor unit
L1
S1
Wiring
L2
S2
circuit
breaker
L3
S3
or
Isolating
N
switch
Wiring
Power
circuit
supply
breaker
3~
or
400V
Isolating
50Hz
switch
Power Wiring
supply circuit
~/N breaker
230V or
50Hz Isolating
switch
<Figure 4.6.2>
Electrical connections 3 phase
Power supply Capacity (indoor unit ref.) Breaker
3~ 400V 50Hz 9 kW
~/N 230 V 50 Hz 3kW (EH*T20*-YM9H*)
*2 3 × 1.5 (polar)
*2 1 × Min. 1.5
*3 230V AC
*3
Cylinder unit
TB1
L
N
To control
board
S1
S2
S3
ECB1
For
L1
booster
heater
L2
(Primary circuit)
L3
ECB2
For
Immersion
L
heater
(DHW tank)
N
Wiring
16 A *1 2.5 mm²
16 A *1 2.5 mm²
24V DC
24