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Procedure
1. Connect the cable to the appropriate terminals as shown on the
picture
2. Fix the cable with cable ties to the cable tie mountings to ensure
strain relief
For boiler and outside circulation pump P_o:
27
28
AHS1 AHS2
ADDITIONAL HEAT SOURCE
CONTROL SIGNAL OUTPUT
Voltage
Maximum running current
Wiring size
Control port signal type
CONTROL SIGNAL OUTPUT
Voltage
Maximum running current
Wiring size
Control port signal type
Procedure
1. Connect the cable to the appropriate terminals as shown on the
picture
2. Fix the cable with cable ties to the cable tie mountings to ensure
stress relief.
For feedback switch signal input（5/7/9 kW unit only，reserved）:
IBH1/2 FEEDBACK INPUT
(SWITCH SIGNAL INPUT)
35
HBK1 HBK2
Atco:auto reset thermal protector
It must be connected to thermal protector!
For external backup heater box(（5/7/9 kW unit only）)
31
39
H1
N
IBH1
CONTROL SIGNAL OUTPUT
IBH1
NOTE
For 5/7/9 kW unit，the
terminal number is 25
and 26.
220~240VAC
0.2A
0.75mm
2
Type 2
8
9
P_o
N
PUMP_O
220~240VAC
0.2A
0.75mm
2
Type 2
36
ATCO
32
39
H2
N
IBH2
CONTROL SIGNAL OUTPUT
IBH2(reserved)
For defrosting signal output:
33
34
Voltage
Maximum running current
Wiring size
FUSE
Control port signal type
DEFROSTING
PROMPT SIGNAL
For user interface:
COMMUNICATION
"PLEASE USE SHIELDED WIRE AND EARTH THE WIRE."
This equipment supports MODBUS RTU communication protocol.
Wire type
5 wire shielded cable
Wire section
AWG18-AWG16(0.75~1.25mm
Maximum wire length
50m
As described above, during wiring, port A in the unit terminal XT6
corresponds to port A in the user interface. Port B corresponds to
port B. Port X corresponds to port X. Port Y corresponds to port Y,
and port E corresponds to port E..
Procedure
1. Remove the rear part of the user interface.
2. Connect the cable to the appropriate terminals as shown in
the picture
3. Reattach the rear part of the user interface
35
220~240VAC
0.2A
0.75mm
2
Type 1
E
Y
X
B
A
1
2
3
4
A B X Y E
XT6
NOTE
2
)
V.2
5
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