15
2.12
ELECTRICAL CONNECTION
The boiler is supplied with an electric cable. Should this
require replacement, it must be purchased exclusively
from SIME. The electric power supply to the boiler must
be 230 V - 50 Hz single-phase through a fused main swit-
ch, with at least 3-mm spacing between contacts. You
are recommended to install a room temperature thermo-
stat to ensure better regulation of temperature and
comfort of indoor ambience.
This thermostat must be Class II, in compliance with the
Standard EN 60730.1.
NOTE: SIME declines all responsibility for injury or
damage to persons, animals or things, resulting from
the failure to provide for proper earthing of the
appliance.
2.12.1 Electric switchboard
To gain access to the switchboard inside the appliance,
unscrew the two screws that fasten it to the rear panel (2,
Fig. 27). The switchboard will tilt downwards at an ade-
quate angle to enable easy access to the components.
KEY
1 Room stat socket
2 Smoke safety stat
(except
“20 TX-BF”
versions)
3 Wired connector J3
4 Wired connector J4
5 Wired connector J5
6 FM 11 programmer (
“IONO”
versions)
7 Water failure warning light
8 Equipment lock out reset
(
“IONO”
versions)
9 Wired connector J6
10 Wired connector J2
11 Wired connector J1
12 “Summer/Winter switch
(except
“20R-BFR”
versions)
13 Main switch
14 Capacitor 1,5 µF (
“20 BF CE”
version)
15 Electric ignition (
“20 BF CE”
versions)
16 EMC filter (
“IONO”
versions)
“Murelle” series
“Murelle BF” series
Fig. 18
