Service manual

27
L1
L2
S1
S2
S3
S1
S2
S3
TB1
L2
L3
ECB1
N
L3
L1
L
N
Earth
leakage
circuit
breaker
*1
Outdoor unit
Power
supply
3N~
400V
50Hz
Wiring
circuit
breaker or
Isolating
switch
To control
board
For
booster
heater
(Primary circuit)
Hydrobox
Wiring
circuit
breaker or
Isolating
switch
Power
supply
~/N
230V
50Hz
Earth
leakage
circuit
breaker
*1
Wiring
circuit
breaker or
Isolating
switch
<3 phase>
<Figure 7-5>
Electrical connections 3 phase
Description Power supply Capacity Breaker Wiring
Booster heater (Primary circuit) 3~ 400 V 50 Hz 9 kW 16 A *1 2.5 mm²
3~ 230 V 50 Hz 9 kW 32 A *1 6.0 mm²
Hydrobox power supply ~/N 230 V 50 Hz
Hydrobox input capacity
Main switch (Breaker)
*1 16 A
Wiring
Wiring No.
× size (mm²)
Hydrobox power supply 2 × Min. 1.5
Hydrobox power supply earth 1 × Min. 1.5
Hydrobox - Outdoor unit *2 2 × Min. 0.3
Hydrobox - Outdoor unit earth —
Circuit
rating
Hydrobox L - N *3 230V AC
Hydrobox - Outdoor unit S1 - S2 *3 —
Hydrobox - Outdoor unit S2 - S3 *3 24V DC
*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. 120 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. Please keep enough output capacity of power supply for each heater. Insuffi cient power supply capacity might cause chattering.
*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 Affi x label B which is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Power supply
3~ 400 V 50 Hz (EH**-YM9(E)B)
3~ 230 V 50 Hz (EHSC-TM9B)
OCH532A