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Manuals
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Worcester Manuals
Boiler
GREENSTAR 25Si
Instruction manual
Central Heating Function; Ignition Sequence - Worcester GREENSTAR 25Si Instruction Manual
Wall hung rsf gas fired condensing combination boiler
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Also See for GREENSTAR 25Si
:
Installation, commissioning and servicing instructions
(76 pages)
,
Installation and servicing instructions
(40 pages)
,
User instructions
(21 pages)
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Room
thermostat and/or
mains
programmer ON
(or link fitted at
ST10)
POWER
BLUE
AND
SWITCH
LIGHT
Facia mounted
ON
ON
programmer (if
fitted) ON
AND
CH control knob
ON
FAULT FINDING
& DIAGRAMS
3 minute wait
Fan to
IGNITION
CENTRAL
start
SEQUENCE
HEATING
DEMAND
speed.
(see detail)
Diverter valve
in CH position
IGNITION SEQUENCE
Pump ON.
Spark
ignition
4 seconds
NO
YES
5th
LOCKOUT
attempt?
Over temperature shut-
Gas valve OFF.
down if water tempera-
Fan overrun
ture is 5°C above set
30 seconds
Fan (& gas)
GREEN
10 second
FLAME
stabilisation
LIGHT
period.
temperature
ON
YES
BURNER
LIT?
NO
Stop spark.
Wait
10 seconds
value.
modulation
END OF
to achieve
BOILER
set
DEMAND
(40-82°C)
Gas valve
OFF
Pump run 3
minutes
Fan run 30
seconds
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This manual is also suitable for:
Greenstar 30si
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