Mitsubishi Electric EHPT17X-VM2E Service Manual page 29

<3 phase>
Affix label B that is included with the manuals near each
wiring diagram for indoor unit and outdoor units.
Power supply
~/N 230 V 50 Hz
Earth
leakage
Power supply circuit
breaker
3N~ 400 V 50 Hz
*1, *2
Power supply
3~ 400 V 50 Hz (E**T***-YM9*D)
3~ 230 V 50 Hz (E**T***-TM9*D)
Description Power supply Capacity
Booster heater 3~ 400 V
(Primary circuit) 50 Hz
3~ 230 V
50 Hz
Immersion heater ~/N 230 V
(DHW tank) 50 Hz
Indoor unit power supply
Indoor unit input capacity
Main switch (Breaker)
Indoor unit power supply
Indoor unit power supply earth
Wiring No.× size (mm²)
Indoor unit - Outdoor unit
Indoor unit - Outdoor unit earth
Indoor unit L - N
Circuit rating Indoor unit - Outdoor unit S1 - S2
Indoor unit - Outdoor unit S2 - S3
*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. 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.
*3. Max. 120 m
*4. 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. Insufficient power supply capacity might cause chattering.
OCH814A
Wiring
Earth
circuit
leakage
breaker
circuit
or
breaker
Isolating
*1, *2
switch
Outdoor unit
Wiring
L1
S1
circuit
breaker
L2
S2
or
Isolating
L3
S3
switch
N
Wiring
circuit
breaker
or
Isolating
switch
Wiring
circuit
breaker
Power supply or
Isolating
~/N 230 V 50 Hz
switch
<Figure 7.5>
Electrical connections 3 phase
Breaker Wiring
(Indoor unit Ref.)
9 kW 16 A *2 2.5 mm²
9 kW 32 A *2 6.0 mm²
3 kW 16 A *2 2.5 mm²
*2
*3
*4
*4
*4
Cylinder unit
TB1
L
N
S1
S2 To control
board
S3
ECB1
L1
For
L2
booster
heater
L3
(Primary circuit)
ECB2
For
L
Immersion
heater
N
(DHW tank)
~/N 230 V 50 Hz
16 A
2 × min. 1.5
1 × min. 1.5
2 × min. 0.3
—
230 V AC
—
24 V DC
29