DHW FUNCTION
DHW FUNCTION
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER BOSCH GREENSTAR 12i System/24i System
8 716 107 375a (02/05)
56
F
A
UL
T
F
IND
IN
G
& D
IA
G
R
A
M
S
W
ait
5 seconds
IGNI
T
IO
N
SE
QU
E
N
CE
(see detail)
NO
YE
S
PO
WE
R
SW
IT
CH
ON
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
(7
5°
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
Cylinder stat
calling
AN
D
F
acia
mounted
programmer
ON
D
O
M
E
STIC
HO
T
WA
T
E
R
DE
MAN
D
GREEN
F
LAM
E
LI
G
H
T
ON
Burner shut down if
primary temperature
94°
C
(until 84°
C
)
IG
N
IT
ION
SEQU
E
N
C
E
R ETU R N TO TH E MAI N
INSTRUCTIONS PAGE 57 FOR
PROTECTION FUNCTION.
