PREXTHERM RSW N
6.1.2 Diagram of the terminal block electrical connections
L
N
Control panel power supply
3
Burner power supply
4
5
1st burner stage thermostat
6
7
1st burner stage thermostat
8
9
Shutdown pilot
10
2nd burner stage operation
11
System pump power supply
12
6.1.3 Wiring diagram for burner and single-phase pump
Key to the symbols/components on the wiring diagram
B1
QG
Water outlet temperature
2
N1
QG
Boiler status/Water temperature instrument
2
P1
QG
System water circulator
2
S1
QG
Remote start enabling signal
2
S2
QG
External safety enabling signal
2
S3
QG
Room thermostat
2
SA1
QG
Boiler ON switch
2
A73020801
(*) Only LV panels
(**) Only 3-Stage LV panels
13
Remote boiler start
14
(jumper if not present)
15
Remote boiler safety
16
(jumper if not present)
17
Room thermostat
18
19
20
Signal for anti-condensation pump
21
22
23
3rd burner stage thermostat
24
SA2
QG
Burner switch
2
SA3
QG
Circulator switch
2
SB1
QG
Test button
2
TR1
QG
1st burner phase thermostat
2
TR2
QG
2nd/3rd burner phase thermostat
2
TS1
QG
Boiler safety thermostat
2
47
EN