Bosch Worcester GREENSTAR CDi Series - CENTRAL HEATING FUNCTION

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POWER
SWITCH
ON
~
BLUE
LIGHT
ON
~
Room
thermostat and/ or
mains
programmer
ON
(or link fitted at
ST10)
AND
Facia mounted
programmer (if
fitted) ON
AND
CH control knob
ON
~
3 minute wait
CENTRAL II ~
HEATING rr-
DEMAND
Diverter valve
in CH position
Pump
ON.
LOCKOUT
Fan to
start
speed.
Gas
valve
OFF.
Fan overrun
30 seconds
IGNITION
~SEQUENCE~
(see detail)
GREEN
FLAME
LIGHT
ON
1
IGNITION SEQUENCE
I
Spark
BURNER
ignition
LIT?
4 seconds
NO
I
NO
I
Stop spark.
5th
Wait
attempt?
10 seconds
1
....
10 second
stabilisation
period.
YES
Over temperature
shut-down if water
temperature is
5•c
above set value.
f--.
Fan (&gas)
modulation
to achieve
f-...,
set
temperature
(35-aa•c)
END OF
BOILER
DEMAND
Gas valve
OFF
Pump
run 3
minutes
Fan run 30
seconds
()
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