Field Wiring - Mitsubishi Electric EHSC-MEC Service Manual

7

FIELD WIRING

Breaker abbreviation Meaning
ECB1 Earth leakage circuit breaker for booster heater
TB1 Terminal block 1
Option 1: Hydrobox powered via outdoor unit
<1 phase>
Affix label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Power
Earth
supply
leakage
~/N
circuit breaker or
230 V
breaker
50 Hz
1, 2
* *
Electrical connections 1 phase
<3 phase>
Affix label A that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Earth
Power
leakage
supply
circuit
breaker or
3N~
breaker
400 V
* 1, * 2
50 Hz
Power supply
3~ 400 V 50 Hz (EH**-YM9(E)C)
3~ 230 V 50 Hz (EHSC-TM9C)
<Figure 7-2>
Electrical connections 3 phase
Hydrobox - Outdoor unit
Hydrobox - Outdoor unit earth
Hydrobox - Outdoor unit S1 - S2
Hydrobox - Outdoor unit S2 - S3
3 Maximum 45 m
*
If 2.5 mm² is used, maximum 50 m.
If 2.5 mm² is used and S3 is separated, maximum 80 m.
4 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. Insufficient power supply capacity might cause chattering.
OCH571D
Outdoor unit
Wiring
circuit
L
S1
Isolating
N
S2
switch
S3
Power
Wiring
supply
circuit
~/N
breaker or
230 V
Isolating
50 Hz
switch
<Figure 7-1>
Outdoor unit
L1
S1
Wiring
circuit
L2 S2
Isolating
L3
S3
switch
N
Wiring
circuit
breaker or
Isolating
switch
3 3 × 1.5 (polar)
*
3
*
* 4
4
*
Hydrobox
TB1
L
N
To control
board
S1
S2
S3
ECB1
For
L booster
heater
N
(Primary circuit)
Hydrobox
TB1
L1
L2
To control
board
S1
S2
S3
ECB1
L1
For
booster
L2
heater
(Primary circuit)
L3
1 × Min. 1.5
230 V AC
24 V DC
30
If the installed earth leakage circuit breaker does
* 1
not have an over-current protection function, install a
breaker with that function along the same power line.
A breaker with at least 3.0 mm contact separation in
* 2
each pole shall be provided. Use earth leakage break-
er (NV).
The breaker shall be provided to ensure disconnection
of all active phase conductors of the supply.
Description Power supply Capacity Breaker Wiring
2 kW
Booster heater ~/N 230 V
(Primary circuit) 50 Hz
6 kW
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.
A breaker with at least 3.0 mm contact separation in
2
*
each pole shall be provided. Use earth leakage break-
er (NV).
The breaker shall be provided to ensure disconnection
of all active phase conductors of the supply.
Description Power supply Capacity Breaker Wiring
3~ 400 V
9 kW
50 Hz
Booster heater
(Primary circuit)
3~ 230 V
9 kW
50 Hz
16 A 2.5 mm²
* 2
32 A 2 6.0 mm²
*
16 A 2 2.5 mm²
*
32 A 2 6.0 mm²
*