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84
AST 14 C 255/00
SECT. 6
ELECTRICAL SYSTEM
6.1 ELECTRONIC BOARD
Boiler is managed by means of two electronic boards, a main board and an interface
board. The former is the boiler hardware in which also the ignition transformer is
integrated. The latter enables the user to control the boiler through a touch screen
interface and an LCD display. Besides, it allows for controlling the filling solenoid valve and
the ambient probes for the management of the heating zones.
The communication between the two boards is made through a cable with a RS485
connection and 24V power supply.
Main board
characteristics
Operating voltage:
from 170Vac to 300 Vac
Power supply frequency:
45 – 66 Hz
Operation ambient temp.:
-20°C ÷ +60°C
Protection class:
IP00
Max absorpt. in stand-by:
1.2 W
Protection fuse:
5x20 2AF
Ionisation current:
2
µ
A
Max. multifunct. relay charge:
230VAC 100VA power
factor 0.7
Flame detection method:
ionisation
Type of detection:
non-polarised
Interface board characteristics
Operating voltage:
24 Vdc
Operation ambient temp.:
-20°C ÷ +60°C
Type of communication:
RS485
Protection class:
IP00
No. of LCD digits:
9 (4 + 3 + 2)
Back-lighting:
yes
Background:
white
Alimentazione
Elettrovalvola
Ingresso RS485
Uscita RS485
Sonde ambiente
