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Option2: Hydrobox powered by independent source.
If the hydrobox and outdoor units have separate power supplies, the following
requirements MUST be carried out:
• Hydrobox electrical box connector connections changed (see Figure
4.5.6)
• Outdoor unit DIP switch settings changed to SW8-3 ON.
• Turn on the outdoor unit BEFORE the hydrobox.
<1 phase>
Power
Earth
supply
leakage
~/N
breaker
230V
50Hz
* Installer MUST affi x label B that is included with the manuals near each wiring diagram for hydrobox and outdoor units.
Description
Booster heater (Primary circuit)
Hydrobox power supply
Hydrobox input capacity
Main switch (Breaker)
Hydrobox power supply
Hydrobox power supply earth
Hydrobox - Outdoor unit
Hydrobox - Outdoor unit earth
Hydrobox L - N
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. 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. 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).
Power
Earth
supply
leakage
~/N
breaker
230V
50Hz
Outdoor unit
Wiring
L
circuit
breaker
N
or
Isolating
switch
Power
supply
~/N
230V
50Hz
Electrical connections 1 phase
Power supply
Capacity (Indoor unit Ref.) Breaker
~/N 230 V 50 Hz
2 kW (EHPX-VM2A)
6 kW (EHSC-VM6A)
*1
*2
*3
*3
*3
Initial settings
(Power supplied
by outdoor unit)
Modified settings
(Separate power
supply to
the hydrobox)
Hydrobox
TB1
Wiring
L
circuit
breaker
N
or
Isolating
switch
S1
S1
To control
S2
S2
board
S3
S3
ECB1
ELB for
Wiring
L
booster
circuit
heater
breaker
N
(Primary circuit)
or
Isolating
switch
Wiring
16 A *1
32 A *1
~/N 230 V 50 Hz
16 A
2 × Min. 1.5
1 × Min. 1.5
2 × Min. 0.3
—
AC230V
—
DC24V
18
L
N
S1
S2
S3
L
N
S1
S2
S3
2.5 mm²
6.0 mm²
Black
CNO1
Hydrobox
control board
Black
CNO1
Hydrobox
control board
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