KEY
1 Ignition electrode
2 M5 x 15 stud bolt
3 Washer ø 5.3
4 Nut M5 OT
5 Right head
6 Intermediate element
with nib
NOTE: When assembling the two
electrodes, be very careful not to
break their ceramic coating; they
must be replaced immediately if it
i s b r o ke n . A l l g a s c o n n e c t i o n s
KEY
SB
Boiler shutdown indicator light
PG
Gas pressure switch
EVG Main gas valve
F
T 4 fuse
ER
Detection electrode
E
Ignition electrode
TC
Step control thermostat
IG
Main switch
SG
Gas pressure indicator light
TS
Safety thermostat
A
SM 191. 1 device
P
Water pressure switch (not supplied)
B
Coil
EVS Second gas solenoid valve
F
Interference filter
TF
Flue gas thermometer (Poland only)
m u s t b e t e s t e d f o r s e a l a f t e r
assembly using soapy wat er or
products manufactured specifical-
ly for the purpose, without using
open flame.
UA
Type Q 70 room thermometer (optional)
SE
Outdoor temperature probe (optional)
SC
Type Q Z21 boiler immersion probe (optional)
SS
Type Q Z21 boiler immersion probe (optional)
PI
Heating system pump (not supplied)
PB
Boiler pump (not supplied)
C
Control unit connectors (black - red - brown)
T
Climate control
TI
Insulation transformer (Belgium only)
F1
Fuse F800 mA (Belgium only)
SF
Flue gas gate (not supplied)
NOTE: When connecting up the RVA 43.222 unit,
remove jumpers 12 - 13 and 15 - 16. When connec-
ting up the flue gas gate (SF) remove the jumper
between terminals 22 - 23.
2. 1 5
ELECTRICAL CONNECTION
The electrical power supply must be
connected to terminals L and N and
to the panel complying with all phase
and neutral positions as shown in
the diagram. If they are not connec-
ted properly, the flame detection cir-
cuit will not work and the boiler will
be shut down. The boiler must be con-
nected up to a single phase 230V-
50Hz power supply through a main
switch protected by fuses with at least
3 mm between contacts (fig. 13).
Fig. 12/c
NOTE: The device must be connec-
t ed t o an ef f icient gr ounding
system. SIME shall not accept any
liability for damage or injury resul-
ting from failure to ground the boi-
ler. Turn off the power supply before
performing any operations on the
electrical panel.
Fig. 13
65