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NOTE
This
equipment
supports
communication protocol.
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
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.
12) For other functional ports
CN21
CN29
CN42
CN40
CN41
CN22
CN1
CN2
1
2
13
a. For room thermostat (Low voltage): see 9.7.6 2) for room thermostat
b. For smart grid:
The unit has smart grid function, there are two ports on PCB to connect SG signal and EVU signal as following:
1. when EVU signal closed, the unit operate as below:
DHW mode turn on, the setting temperature will be changed to 70℃automatically, and the TBH operate as below:T5<69. the TBH
is on, T5 ≥ 70, the TBH is off. The unit operate in cooling/heating mode as the normal logic.
2. When EVU signal is open, and SG signal is closed, the unit operate normally.
3. When EVU signal is open, SG signal is open, the DHW mode is off, and the TBH is invalid, dis-infect function is invalid. The max
running time for cooling/heating is "SG RUNNIN TIME", then unit will be off.
MODBUS
RTU
CN5
CN28
CN25
DIS1
S3
S4
3
4
5
6
7
8
9
10
11
12
14
15
16
17
18
19
20
21
22
23
24
CN11
Wire type
Wire section(mm
)
2
Maximum wire length(m)
CN24
CN8
CN6
CN16
CN13
CN15
CN18
S1
S2
CN31
CN4
CN35
CN36
CN17
25
26
27
28
1
2
3
4
5
29
30
31
32
6
7
8
9
10
CN7
CN30
40
5 wire shielded cable
0.75~1.25
50
For room thermostat (Low voltage)
For smart grid
V.1
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