Terminal layout
Power connection
Outputs
– Heating circuit 1 pump as relay output
– Heating circuit 2 pump as relay output
– Burner as relay output
– Mixer closed (or 2nd burner stage) as relay output
– Mixer closed (or 2nd burner stage) as relay output
– Pump for domestic hot water feed as relay output
– Pump for domestic hot water circulation as relay output
N
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
N
N
N
N
N
N
N
L
L'
L'
L'
L'
L'
L'
L'
230 V~ 50 Hz
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18 19 20
20
19
18
SEL
V
5
GB
6
8
7
5
4
3
2
1
Inputs
– Input fault (see page 4)
– OpenTherm-Slave (Connection RAMSES 850 top2 OT)
– OpenTherm-Master (Connection of second OT-Box)
– Domestic hot water temperature sensor
– Feed temperature sensor (mixer circuit)
– Boiler temperature sensor
– External temperature sensor
– Domestic hot water return temperature sensor
(controls circulation pump)
The connected devices or sensors must be suitable for
SELV or marked with protection class III.
19
18
9 10
17
16
20
13
14
not used
11 12 15
