Bosch Worcester Greenstar CDi Conventional Series - Heating Function

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