Bosch GREENSTAR 24i junior - Manual (Page 58)

W
ait
5 seconds
IG
N
ITI
O
N
SE
QU
E
N
CE
(see detail)
PREHEAT AND DHW FUNCTION
NO
YE
S
PO
WE
R
SW
IT
CH
ON
Tap open
(recognised
by flow turbine)
Diverter valve
in D
H
W
position
P
ump O
N
.
BL
UE
LI
G
H
T
ON
BURNER
L
IT?
F
an to start
speed.
Stop spark.
W
ait
10 seconds
5th
attempt?
L
O
CK
OUT
F
an (& gas)
modulation to ac
hieve
set
temperature
(4
0-6
0
°C)
DE
MAN
D
END
Gas valve
OFF
P
ump run 3 minutes
F
an run 3
0
seconds
Over temperature shut- down if water tempera-
ture is 8°
C ab
ove set
value.
Gas valve O
F
F.
Spark ignition
4 seconds
NO
YE
S
EC
O button
not
illuminated * (ie preheat requested)
AN
D
20 minutes
since last pre- heat demand
AN
D
temperature at least 10°
below set
point.
P
REHE
A
T
DE
MAN
D
D
O
M
E
STIC
HO
T
WA
T
E
R
DE
MAN
D
(priority over
all other
demands)
GREEN F
LAM
E
LI
G
H
T
ON Burner shut down if primary temperature
94°
C
(until 84°
C
)
F
an (& gas)
modulation to ac
hieve
(55°
C)
DE
MAN
D
END
Gas valve
OFF
Stop pump
Stop fan
IG
N
IT
ION
SEQU
E
N
C
E
*Set by
pressing EC
O button. If pro-
grammer is fitted this is set by a combination of programmer
(D
HW) demand and EC
O
button.
PREHEAT AND DHW FUNCTION INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR 24 i junior/28 i junior
8 716 107 336b (11/05)
57
FA
U
LT
F
IN
D
IN
G
& D
IA
G
R
A
M
S