Ferroli OPERA 70 Instrucciones De Uso, Instalación Y Mantenimiento página 168

Accessing the electrical terminal block
The electrical terminal block is located in the back of the boiler. Make the electrical connections as shown in the wiring
diagram on fig. 91 and run the cables through the special cable glands.
B
Maximum applicable loads:
• Heating circulating pump: 230Vac 0.8A max,
• 3-way valve: 230 Vac, 0.8 A max,
• Alarm: 230 Vac, 0.8 A max,
For connection in cascade
NOTE: The boiler electronics can manage up to a maximum of 6 modules.
1. Connect the modules as shown in fig. 56 (example with 3 modules)
A
36 35 34 33 32 31
A 1st Module
B 2nd Module
2. Carry out all the electrical connections (terminals 1 to 30) on module no.1
3. On the remaining modules, connect only the power supply and, if necessary, the contacts relevant to: burner on
(300), fault contact (301) and remote reset input (302).
Remove the jumper relevant to: Room Thermostat (72)/Remote Timer Control (139).
4. Switch on the power to the entire cascade
5. After the "FH" procedure, check correct operation of the cascade:
• Module 1: MASTER icon
• Module 2: SLAVE icon
• Module 3: SLAVE icon
If this does not occur, disconnect the power and check the wiring in fig. 56. .
168
fig. 55- Electrical terminal block
= 0.6 for max 1 minute, 0.4 A continuous
= 0.6
B
36 35 34 33 32 31
fig. 56- Cascade connection
cod. 3541R963 - Rev. 00 - 09/2021
= 0.6
36 35 34 33 32 31
C 3rd Module
OPERA
C
EN