Johnson AURUM R290 M Serie Guide D'utilisation page 82

CAUTION
To ensure the unit is fully earthed, always
connect the backup heater power supply and
the earth cable.
This appliance which connect 1-phase 3
kW backup heater can be connected only to a
supply with system impedance no more than
0.465 Ω. In case necessary, please consult
your supply authority for system impedance
information.
6.5 Connection of other
components
The port provides the control signal to the load. Two
kinds of control signal ports:
Type 1: dry contactor without voltage.
Type 2: the port provides the signal with 220-240
V~ 50 Hz voltage.
NOTE
If the current of load is lower than 0.2 A,
the load can be connected to the port directly.
If the load current is higher than or equal to
0.2 A, it is necessary to connect the AC
contactor to the load.
Illustrations below are for 3-phase units.
The principle is the same for 1 -phase units.
Illustrations below are based on units with
a backup heater.
6.5.1 Wiring of additional heating source
control (AHS)
AHS1 AHS2
1 2
CN11
FUSE
L
Power supply
7 5 3 1
KM1
8 6 4 2
Additional heat source
A1
A2
N
25
The wiring between the switch box and the back plate
is shown in 6.4.1 Wiring of main power supply.
L-N Voltage
Maximum running current (A)
2
Minimum wire size (mm )
Control port signal type
NOTE
This part only applies to basic units (without a
backup heater). For customized units (with a
backup heater), the hydraulic module should
not be connected to any additional heat
source as there is an interval backup heater
in the unit.
6.5.2 Wiring of 3-way valves SV1,
SV2 and SV3
NOTE
Refer to the INSTALLATION, OPERATION
AND MAINTENANCE MANUAL for the
installation locations of SV1, SV2 and SV3.
The illustration below is for this type of SV:
o
C1
ON
~
OFF
SV1:
1ON 1OFF
3 4
17
CN11
C1
SV1
220-240 V AC
0.2
0.75
Type 1
Neutral
Phase (close )
Phase (open )
V.1