Bosch GREENSTAR 24i junior - Manual (Page 57)

CENTRAL HEATING FUNCTION
NO
YE
S
PO
WE
R
SW
IT
CH
ON
CE
NTRAL
HE
A
T
IN
G
DE
MAN
D
F
an to start
speed.
Diverter valve in C
H
position
P
ump O
N
.
IG
N
ITI
O
N
SE
QU
E
N
CE
(see detail)
BL
UE
LI
G
H
T
ON
BURNER
L
IT? GREEN F
LAM
E
LI
G
H
T
ON
Stop spark.
W
ait
10 seconds
5th
attempt?
L
O
CK
OUT
10 second stabilisation
period.
F
an (& gas)
modulation to ac
hieve
set
temperature
(4
0-82°
C)
E
N
D OF
BOI
L
E
R
DE
MAN
D
Gas valve
OFF
P
ump run 3 minutes
F
an run 3
0
seconds
Over temperature shut- down if water tempera-
ture is 5°
C ab
ove set
value.
Gas valve O
F
F.
F
an overrun
3
0
seconds
3 minute wait
Spark
ignition
4 seconds
NO
YE
S
Room
thermostat and/or
mains
programmer O
N
(or link fitted at
S
T10)
AND
F
acia mounted
programmer (if fit-
ted) O
N
AND
C
H
control knob
ON
IG
N
IT
ION
SEQU
E
N
C
E
CENTRAL HEATING FUNCTION INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 24 i junior/28 i junior
8 716 107 336b (11/05)
56
F
A
UL
T
F
IND
IN
G
& D
IA
G
R
A
M
S