WIRING DIAGRAM KEY
A
-
Electrical control box
BB
-
Components on burners
BC
-
Components on boiler
C1
-
Capacitor
FR
-
Photocell
H
-
Remote lockout signalling
h1
-
Hour counter
IN
-
Manual burner arrest switch
MV
-
Fan motor
Q2
-
Single phase knife switch
RS
-
Remote burner reset button (accessory)
TA
-
Ignition transformer
TL
-
Limit thermostat/pressure switch
TS
-
Safety thermostat/pressure switch
V1
-
Ignition solenoid
V2
-
Operating solenoid
WC
-
Capacitor connection
X7
-
7 pin plug
XP7
-
7 pole socket
XTB
-
Shelf earth
20