40
Procedure
Remove the rear part of the user interface.
Connect the cable to the appropriate terminals as shown in the picture.
Reattach the rear part of the user interface.
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.
This equipment supports MODBUS RTU
communication protocol.
NOTE
Wire type
Wire section(mm
2
)
Maximum wire length(m)
5 wire shielded cable
0.75~1.25
50
10) For defrosting signal output:
DEFROSTING
PROMPT SIGNAL
FUSE
31
DFT2 DFT2
32
L N
Control port signal type
Voltage
Maximum running current(A)
Wiring size(mm
2
)
Type 1
220-240VAC
0.2
0.75
11) For wired controller:
E
“PLEASE USE SHIELDED WIRE AND
EARTH THE WIRE.”
A
B X Y
1
2
3 4
5
XT6
COMMUNICATION
A
B X Y
E
1
2
3 4
5
MODBUS
E
A+
B-
The unit has smart grid function, there are two ports on PCB to connect SG signal and EVU signal as following:
b. For smart grid:
a. For room thermostat (Low voltage): see 9.7.6 2) for room thermostat
12) For other functional ports
For room thermostat
(Low voltage)
For smart grid
30
29
32
25
26
27
28
31
7
12
11
10
9
18
8
7
5
23
22
24
1
2
13
3
4
6
20
14
15
17
19
16
21
6
8
9
10
5
4
3
2
1
CN4
CN22
CN5
S3
DIS1
CN24
CN1
CN2
CN6
CN8
CN13
CN15
CN16
CN18
CN28
S2
CN42
CN21
S1
S4
CN11
CN7
CN17
CN19
CN30
CN35
CN14
CN31
CN36
CN25
CN29
CN40
CN41
CN32
SW9
1. When EVU signal is on , and SG signal is on, as long as the DHW mode is set to be valid, heat pump will operate DHW mode
priority and the DHW mode setting temperature will be change to 70
℃
. T5
＜
69
℃，
the TBH is on,T5≥70
℃，
the TBH is off.
2. When EVU signal is on , and SG signal is off, as long as the DHW mode is set to be valid and the mode is on, heat pump will
operate DHW mode priority. T5
＜
T5S-2
，
the TBH is on,T5≥T5S+3
，
the TBH is off.
3. When EVU signal is off, and SG signal is on, the unit operates normally.
4. When EVU signal is off, and SG signal is off, the unit operates as below: The unit will not operate DHW mode, and the TBH
is invalid, disinfect function is invalid. The max running time for cooling/heating is ”SG RUNNING TIME”, then unit will be off.