Glow-worm BBU 45/4 - Manual (Page 17)

17 2000225023C
5 Electrical Wiring
Diagram 5.8
9490
MAINS IN
BOILER
USER
CONTROL
THERMISTOR
EARTH
POST
GAS VALVE
FLUE BLOCKAGE
SAFETY DEVICE
AND PILOT
b
br
g/y
g/y
g/y
b
br
bk
r b wh bk y g
bk wh
bk bk
or
KEY
Black bk
Blue b
Brown br
Green g
Yellow y
Green/Yellow g/y
White
wh
Orange or
br
b
OVERHEAT CUT-OFF DEVICE
(SEALED SYSTEM ONLY)