Mitsubishi Electric Ecodan EHSC series Installation Manual page 25

4
Installation
Option 1: Hydrobox powered via outdoor unit
<1 phase>
Power
supply
~/N
230V
50Hz
*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 hydrobox and outdoor units.
Description
Booster heater (Primary circuit)
Hydrobox - Outdoor unit
Hydrobox - Outdoor unit earth
Hydrobox - Outdoor unit S1 - S2
Hydrobox - 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.
4. Please keep enough output capacity of power supply for each heater. The lack of the power supply capacity might cause chattering.
Wiring
Earth
circuit
leakage
breaker or
circuit
Isolating
breaker
switch
*1
Power
supply
~/N
230V
50Hz
<Figure 4.5.5>
Electrical connections 1 phase
Power supply Capacity Breaker
~/N 230 V 50 Hz 2 kW
6 kW
*2 3 × 1.5 (polar)
*2 1 × Min. 1.5
*3 230V AC
*3 24V DC
Hydrobox
TB1
L
Outdoor unit
N
L
S1
S1
S2
N
S2
S3
S3
ECB1
L
Wiring
circuit
N
breaker or
Isolating
switch
Wiring
16 A *1 2.5 mm²
32 A *1 6.0 mm²
To control
board
For
booster
heater
(Primary circuit)
24