Mitsubishi Electric ecodan EHSC series Installationshandbuch Seite 21

4
Installation
Option2: Hydrobox powered by independent source
If the hydrobox and outdoor units have separate power supplies, the following
requirements MUST be carried out:
• Change connector connections in hydrobox control and electrical box
(see Figure 4.5.7).
• Turn the outdoor unit DIP switch SW8-3 to ON.
• Turn on the outdoor unit BEFORE the hydrobox.
<1 phase>
Power
supply
~/N
230 V
50 Hz
Power
Wiring
supply Earth
~/N leakage circuit
breaker or
230 V circuit
breaker Isolating
50 Hz
switch
*
<Figure 4.5.8>
Electrical connections  phase
<3 phase>
Power
supply
~/N
230 V
50 Hz
Power
supply
Earth
3N~
leakage
400 V
breaker or
circuit
50 Hz
breaker
*
Power supply
3~ 400 V 50 Hz (EH**-YM9(E)B)
3~ 230 V 50 Hz (EHSC-TM9B)
<Figure 4.5.9>
Electrical connections 3 phase
Hydrobox power supply
Hydrobox input capacity
Main switch (Breaker)
Hydrobox power supply
Hydrobox power supply earth
Hydrobox - Outdoor unit
Hydrobox - Outdoor unit earth
Hydrobox L - N
Hydrobox - Outdoor unit S - S2
Hydrobox - Outdoor unit S2 - S3
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.
Earth
Wiring
leakage circuit
circuit breaker or
breaker Isolating
* switch
Outdoor unit
L
S1
N
S2
S3
Power Wiring
circuit
supply
~/N breaker or
230V Isolating
50Hz switch
Wiring
Earth
leakage circuit
circuit breaker or
breaker Isolating
* switch
Outdoor unit
L1 S1
Wiring
L2 S2
circuit
L3 S3
Isolating
switch
N
Wiring
circuit
breaker or
Isolating
switch
~/N 230 V 50 Hz
* 6 A
2 × Min. .5
 × Min. .5
*2 2 × Min. 0.3
*3 230 V AC
*3
*3 24 V DC
(Power supplied
Hydrobox
TB1
L
N
S1
To control
S2
board
S3
ECB1
For
booster
L
heater
* If the installed earth leakage circuit breaker does not have
(Primary circuit)
N
an over-current protection function, install a breaker with that
function along the same power line.
*2 Affix label B that is included with the manuals near each wiring
diagram for hydrobox and outdoor units.
Description Power supply
Booster heater (Primary circuit)
Hydrobox
TB1
L
N
To control
board
S1
S2
S3
ECB1
For
booster
L1
heater
(Primary circuit) * If the installed earth leakage circuit breaker does not have
L2
an over-current protection function, install a breaker with that
L3
function along the same power line.
*2 Affix label B that is included with the manuals near each wiring
diagram for hydrobox and outdoor units.
Description
Booster heater (Primary circuit)
*. 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. 20 m
*3. The values given in the table above are not always measured against
the ground value.
—
L
N
Initial settings
S1
by outdoor unit)
S2
S3
L
N
Modified settings
(Separate power
supply to
the hydrobox)
S1
S2
S3
<Figure 4.5.7>
Capacity Breaker
2 kW
~/N 230 V 50 Hz
6 kW
Power supply Capacity Breaker
3~ 400 V 50 Hz 9 kW
3~ 230 V 50 Hz 9 kW
Black
CN01
Hydrobox
control board
Black
CN01
Hydrobox
control board
Wiring
6 A * 2.5 mm²
32 A * 6.0 mm²
Wiring
6 A * 2.5 mm²
32 A * 6.0 mm²
20