A1
CONTROL BOX
B1
PHOTORESISTANCE
F1
THERMAL RELAY
FU1
FUSES
HO
EXTERNAL BLOCK LAMP
H1
OPERATION LIGHT
H17
VENTILATOR LAMP
H18
2ND STAGE LAMP
H19
MAIN VALVES ON LIGHT
H2
LOCK-OUT SIGNAL LAMP
H23
TRANSFORMER LAMP
K1
MOTOR RELAY
KE
EXTERNAL CONTACTOR
MV
MOTOR
P1
HOUR METER
S1
ON-OFF SWITCH
S2
RE-SET PUSH BUTTON
S8
1ST – 2ND STAGE SWITCH
SG
GENERAL SWITCH
T2
2ND STAGE THERMOSTAT
TA
IGNITION TRANSFORMER
TC
BOILER THERMOSTAT
TS
SAFETY THERMOSTAT
X1
BURNER TERMINAL
X1B/S
POWER SUPPLY CONNECTOR
X2B/S
2ND STAGE CONNECTOR
X9
TRASFORMER CONNECTOR
X18
SYNOPTIC CONNECTOR
Y1/Y2
1st / 2nd STAGE SOLENOID VALVE
Y10
AIR SERVOMOTOR
YS
SAFETY VALVE
Z1
FILTER
DIN / IEC
GB
GNYE
GREEN / YELLOW
BU
BLUE
BN
BROWN
BK
BLACK
BK*
BLACK CONNECTOR WITH OVERPRINT
EN
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