Field Wiring - Mitsubishi Electric EHST20C-VM6HA Service Manual

7

FIELD WIRING

Option 1: Cylinder unit powered via outdoor unit
<1 phase>
Power
supply
~/N
230V
50Hz
* Installer MUST affix label A that is included with the manuals near each wiring diagram for cylinder 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 - S
Cylinder unit - Outdoor unit S - 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. The power supply MUST have sufficient capacity for each heater and ALL electrical loads. Insufficient power supply may result in
chattering of load contactor(s).
Wiring
Earth circuit
breaker
leakage
or
breaker
Isolating
switch
Power
supply
~/N
230V
50Hz
Power
supply
~/N
230V
50Hz
<Figure 7-1>
Electrical connections 1 phase
Power supply Capacity (Indoor unit Ref.) Breaker
~/N 230 V 50 Hz 2 kW (E******-VM2**)
6 kW (E******-VM6**)
~/N 230 V 50 Hz 3 kW (E******-VM*H*)
*2
*2
*3
*3
1
TB1
Outdoor unit
L S1
S1
S2
N S2
S3
S3
ECB1
Wiring
circuit
breaker
or
Isolating
switch
ECB2
Wiring
circuit
breaker
or
Isolating
switch
Wiring
16 A *1
32 A *1
16 A *1
3 × 1.5 (polar)
1 × Min. 1.5
AC30V
DC4V
Cylinder unit
L
N
To control
board
ELB for
L
booster
heater
N
(Primary circuit)
ELB for
L
immersion
heater
N
(DHW tank)
.5 mm²
6.0 mm²
.5 mm²