baltur TBG 45 MC Instruction Manual For Installation, Use And Maintenance page 66

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A1 CONTROL BOX
A3 VALVE SEAL CONTROL
B1 Flame sensor
F1 THERMAL RELAY
FU1÷4 FUSES
H0 EXTERNAL LOCK INDICATOR LIGHT/ AUXILIARY HEATING
ELEMENT OPERATION LAMP
H1 OPERATION INDICATOR LIGHT
H2 LOCK-OUT WARNING LIGHT
K1 FAN MOTOR CONTACTOR
K7 INVERTER START RELAY
KE EXTERNAL CONTACTOR
MV FAN MOTOR
N1 "ELECTRONIC REGULATOR
P1 HOUR METER
PA AIR PRESSURE SWITCH
Pm MINIMUM PRESSURE SWITCH
P M "MAXIMUM PRESSURE SWITCH"
S1 START/STOP SWITCH
S2 RELEASE BUTTON
S5 MIN-O-MAX MODULATION SWITCH
SG MAIN SWITCH
T2 2ND STAGE THERMOSTAT
TA IGNITION TRANSFORMER
TC BOILER THERMOSTAT
TS SAFETY THERMOSTAT
X1 BURNER TERMINAL BOARD
X1B/S POWER SUPPLY CONNECTOR
X2B/S 2nd STAGE CONNECTOR
X3 Pm CONNECTOR
X4 YP CONNECTOR
X9 TRANSFORMER CONNECTOR
YP MAIN SOLENOID VALVE
Y10 AIR SERVOMOTOR
GNYE GREEN / YELLOW
BU BLUE
BN BROWN
BK BLACK
BK* BLACK CONNECTOR WITH OVERPRINT
*** For calibration only
** Upon request
L1 - L2- L3 Phases
N - Neutral
Minimum ionisation current 3 μA
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Ground