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Dry Contact
The dry contact should be short-circuited when not in use. Otherwise the controller will fail in heating/cooling mode.
When the dry contact is connected to a thermostat, in heating/cooling mode, the unit will stop or startup accor-
ding to the signal of the thermostat.
If the thermostat is a live device, installing a relay is required. Otherwise it will burn out the PCB.
Anti-legionella Function
1. When connect the E-heater in DHW water tank to the Anti-legionella signal port, installing an AC contactor is
required. Otherwise it will burn out the PCB.
2. The anti-legionella parameters setting (only for technician operating)
a. In main menu, press
ton to set parameters. Press
b. In parameter setting menu, if there is no operation for 30 seconds, will automatically exit
parameter setting and back to main menu. Or press
N°
Description
b27
Anti-legionella interval time
b28
Anti-legionella temp
a. when the relay starts for 144 (parameter b27, interval time, adjustable) hours, enter anti-legionella mode,
DHW e-heater starts;
b. when DHW water tank temperature ≥ 70°C (parameter b28, target temperature, adjustable), DHW e-heater
stops;
c. when DHW water tank temperature ≤ 68°C (70°C-2°C), DHW e-heater starts;
d. exit anti-legionella mode after worked for 30 minutes.
Dry contact - Athena C
1
2
3
4
N
L
Dry contact - Athena C
1
2
3
N
L
Anti-Legionella- Athena C
1
2
3
4
L
Anti-Legionella- Athena C
N
1
2
3
L
N
E-Heater - Athena C
1
2
3
4
E-Heater - Athena C
button for 3 seconds to enter parameter setting menu, press
1
2
3
button to save setting.
Default value
5
6
7
8
9
10
4
5
6
7
8
5
6
7
8
9
10
4
5
6
7
8
5
6
7
8
9
10
4
5
6
7
8
button to back to main menu.
Unit
Range
144
h
70
°C
11
12
9
10
11
12
11
12
9
10
11
12
11
12
or
9
10
11
12
When set to 0,
0~9999
this function is not
available
1~99
pbut-
Note
71
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