A1
EQUIPMENT
A3
VALVES TIGHTNESS CONTROL
B1
PHOTORESISTANCE / IONISATION ELECTRODE
F1
THERMAL RELAY
FU1
FUSES
HO
EXTERNAL SHUT-DOWN WARNING LIGHT /
H1
OPERATION INDICATOR LIGHT
H17
VENTILATOR LAMP
H18
2
STAGE OPERATION LIGHT
ND
H19
MAIN VALVE OPERATION LIGHT
H2
LOCK INDICATOR LIGHT
H23
TRANSFORMER LAMP
K1
MOTOR RELAY
KE
EXTERNAL CONTACTOR
MV
FAN MOTOR
P M
MAXIMUM PRESSURE SWITCH
P1
HOUR METER
PA
AIR PRESSURE SWITCH
Pm
GAS MIN. PRESSURE SWITCH
S1
START/STOP SWITCH
S2
RELEASE BUTTON
S8
1ST – 2ND STAGE SWITCH
SG
MAIN SWITCH
T2
2
STAGE THERMOSTAT
ND
TA
IGNITION TRANSFORMER
TC
BOILER THERMOSTAT
TS
SAFETY THERMOSTAT
X1
BURNER TERMINAL
X1B/S
POWER SUPPLY CONNECTOR
X2B/S
2
STAGE CONNECTOR
ND
X3
Pm CONNECTOR
X4
YP CONNECTOR
X8B/S
VPS 504 CONNECTOR
X9
TRANSFORMER CONNECTOR
X18
SYNOPTIC CONNECTOR
Y1/Y2
SOLENOID VALVE
EN
23 / 24
0006081041_201401
Y10
AIR SERVOMOTOR
YP
MAIN SOLENOID VALVE
Z1
FILTER
DIN / IEC
EN
GNYE
GREEN / YELLOW
BU
BLUE
BN
BROWN
BK
BLACK
BK*
BLACK CONNECTOR WITH OVERPRINT
MINIMUM IONISATION CURRENT 3 μA
**
OPTIONAL