
A1
CONTROL BOX
B1
Flame sensor
Y1/Y2 1st / 2nd STAGE SOLENOID VALVES
H0
EXTERNAL LOCK INDICATOR LIGHT/ AUXILIARY HEATING
ELEMENT OPERATION LAMP
H1
OPERATION INDICATOR LIGHT
P1
“HOUR METER“
PA
AIR PRESSURE SWITCH
Pm
MINIMUM PRESSURE SWITCH
MV
FAN MOTOR
S2
RELEASE BUTTON
TC
BOILER THERMOSTAT
TS
SAFETY THERMOSTAT
X1B/S POWER SUPPLY CONNECTOR
L1 - L2- L3 Phases
N - Neutral
Ground
Minimum ionisation current 1.5 μA
ENGLISH
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