Ferroli PREXTHERM RSW Serie Instrucciones Para El Uso, La Instalación Y El Montaje página 56

Connection diagram for the base control unit (part 1)
EN
56
PREXTHERM RSW 92N ÷ 600N
cod. 3541P130 - Rev. 00 - 02/2018
1 - (3P2) Boiler anti-condensation bypass pump
Max. 2 A
If necessary, use as an enabling signal
2 - (3P1) Water circulation pump
Max. 2 A
If necessary, use as an enabling signal
3 - (3B1) Boiler water return temperature sensor
OPTIONAL
Use NTC 10K probe
4 - (3B1) External ambient temperature sensor
OPTIONAL
Use NTC 10K probe