Electrical Connections; Important - Ferroli FORCE B Instrucciones De Uso, Instalación Y Mantenimiento

FORCE B

2.5 Electrical connections

IMPORTANT

B
BEFORE CARRYING OUT ANY OPERATION THAT REQUIRES REMOVING
THE CASING, DISCONNECT THE BOILER FROM THE ELECTRIC MAINS
WITH THE MAIN SWITCH.
NEVER TOUCH THE ELECTRICAL COMPONENTS OR CONTACTS WITH THE
MAIN SWITCH TURNED ON! DANGER OF ELECTRIC SHOCK WITH RISK OF
INJURY OR DEATH!
B
The unit must be connected to an efficient grounding system in accordance with
applicable safety regulations. Have the efficiency and suitability of the grounding
system checked by professionally qualified personnel; the Manufacturer declines
any liability for damage caused by failure to earth the system.
The boiler is prewired and provided with a three-pole cable, without a plug, for con-
nection to the electric line. The connections to the grid must be made with a perma-
nent connection and equipped with a bipolar switch whose contacts have a minimum
opening of at least 3 mm, interposing fuses of max. 3A between the boiler and the
line. Make sure to respect the polarities (LINE: brown wire / NEUTRAL: blue wire /
GROUND: yellow-green wire) in the connections to the electric line.
B
The unit's supply cable MUST NOT BE REPLACED BY THE USER. If the cable
gets damaged, turn the unit off and have the cable replaced only by profes-
sionally qualified personnel. In case of replacement, only use cable "HAR H05
VV-F" 3x0.75 mm2 with max. external diameter of 8 mm.
For cascade connection
NOTE: The boiler's electronics can manage up to a maximum of 6 modules.
1. Connect the modules as shown in fig. 53 (example with 3 modules)
A 1st Module
B 2nd Module
2. Make all electrical connections (terminals 1 to 30) on Module 1
3. On the remaining modules, only connect the power supply and possibly the contacts relevant to: burner lit (300),
fault contact (301) and remote reset input (302).
Remove the jumper relevant to: Room Thermostat (72)/Remote Timer Control (139).
4. Supply electric 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 supply and check the wiring in fig. 53.
EN
A
31 32 33 34 35 36 31 32 33 34 35 36
fig. 53 - Connection in cascade
cod. 3541T170 - Rev. 00 - 09/2019
B C
31 32 33 34 35 36
C 3rd Module
149