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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