Field Wiring - Mitsubishi Electric EHSC-VM6A Service Manual

7

FIELD WIRING

Option 1: Hydrobox powered via outdoor unit
<1 phase>
Power
supply
~/N
230V
50Hz
* Installer MUST affi x 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 fl exible cord. (Design 60245 IEC 57)
Indoor unit power supply cords shall not be lighter than polychloroprene sheathed fl exible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
4. The power supply MUST have suffi cient capacity for each heater and ALL electrical loads. Insuffi cient power supply may result in
chattering of load contactor(s).
Wiring
circuit
Earth
breaker
leakage
or
breaker
Isolating
switch
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 (EHPX-VM2A)
6 kW (EHSC-VM6A)
*2 3 × 1.5 (polar)
*2 1 × Min. 1.5
*3
*3
TB1
L
Outdoor unit
N
L S1
S1
S2
N S2
S3
S3
ECB1
Wiring
L
circuit
breaker
N
or
Isolating
switch
Wiring
16 A *1 2.5 mm²
32 A *1 6.0 mm²
AC230V
DC24V
16
Hydrobox
To control
board
ELB for
booster
heater
(Primary circuit)