94
Terminal function control logic
Port
Description
Logic
Remark
CN3 Standard modbus/
Third party protocol /
CN4 HU and outdoor
communication
/
CN5 Sub controller power
supply
/
12V
CN6 Sub controller
/
CN13 Room thermostat 2 Zone2 Room thermostat
10K
CN14 Floor valve
Startup
:
a. Hydronic box heating model, heating or swimming pool
b.In defrosting, anti rusting, anti freezing operation
OFF:
Unit off or cooling mode
220V ~ output
SV1
Reserved
220V ~ output
CN15
Freeze Heater
Reserved
220V ~ output
Tank Heater
T_tank>0°C
,
tank heater is valid
1. Startup condition (and):
a. Hot Water Function ON by controller
b. T_tank
＜
T_tankset-1
c. Compressor stops for over 10min or Hot Water Function on for
more than 60min
2. OFF condition (or)
:
a. Controller off
b. T_tank≥T_tankset
c. Compressor runs within 0-60min when Hot Water Function on
Note: When in fast hot water operation, the tank electric heater will
be forced to open, without limit of outdoor ambient temperature and
compressor running time
220V ~ output
CN16 3-way valve
3-way valve on: hot water operation
3-way valve off: other mode opeartion
220V~ L/N/K
output
CN17 Mixing valve
Rule: Valve open when NL electrified. vlave close when KL
electrified; Maintain status when KL power down. KL cannot
electrified together. N is common port
Control as below after initial power on for 5min: (T is the operation
process of mixing valve, default is 60s)
A. Zone2 cooling:
When Twzone_2>Twzone_1, valve open 5%*T per min
When Twzone_2Target-1≤Twzone_2≤Twzone_1, maintain
When Twzone_2
＜
Twzone_2Target-1, valve close 5%*T per min
B. Zone2 heating:
When Twzone_2
＜
Twzone_2Target-1, valve open 5%*T per min
When Twzone_2Target-1≤Twzone_2≤Twzone_1, maintain
When Twzone_2>Twzone_1, valve close 5%*T per min
Note: water mixing valve will stop opening when reating max. and
stop closing when reaching min.
220V~ L/N/K
output
CN21 Error output
When unit output error, terminal close; otherwisw will open
ON/OFF
output
CN38 Room thermostat 1 Zone1 Room thermostat
10K
CN39/
CN40
Electric heater
overheat
>95°C overheat protection; ≤65°C reset
12V DC
output
