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39
Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 2
220-240VAC
0.2
0.75
6) For external backup heater kit (optional)
IBH1
N
14
16
IBH1
CONTROL SIGNAL
OUTPUT
Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 2
220-240VAC
0.2
0.75
7) For antifreeze e-heating tape (external)
HT
N
25
29
Heating
CONTROL SIGNAL
OUTPUT
Connection of the booster heater cable depends on the application. Only when the domestic hot water tank is installed will
this wiring be needed. The unit only sends a turn on/off signal to the booster heater. An additional circuit breaker is needed
and a dedicated terminal is needed to supply power to the booster heater.
See also "8 Typical application examples" and "10.7 Field settings/DHW control” for more information.
Procedure
Connect the cable to the appropriate terminals as shown in the picture.
Fix the cable with cable ties to the cable tie mountings to ensure stress relief.
5) For tank booster heater:
Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 2
220-240VAC
0.2
0.75
N
13
16
TBH
TANK BOOST HEATER
CONTROL SIGNAL OUTPUT
Procedure
Connect the cable to the appropriate terminals as
shown in the picture.
Fix the cable reliably.
Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 2
220-240VAC
0.2
0.75
9) For additional heat source control
:
AHS1 AHS2
27
28
ADDITIONAL HEAT SOURCE
CONTROL SIGNAL OUTPUT
Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 2
220-240VAC
0.2
0.75
Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 2
220-240VAC
0.2
0.75
R2
R1
26 30
Runnig state
CONTROL SIGNAL
OUTPUT
8) For unit running state output