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2.4 External wiring
The appliance comes with a factory fitted cable that should be connected to a suitable fused isolator or plug. If this is unsuitable and a direct con-
nection to the appliance is required, it must be connected to the appliance as shown in the following diagram. For further advice on the electrical
connection, please contact Vokera technical on 0844 391 0999.
X3
X6
X4
MOD
14
Control oard
IWH02
CN1-X1-X9 Connectors
Transformer
TR1
Ignition transformer
TR2
F
External fuse 3.15A
Fuse 2A
F1
Detection/ignition electrode
E.A./R.
M5
Terminal board for external connections: 230V
Fan
V
Gas valve
VG
OPE
Gas valve operator
Modulator
MOD
Burner thermostat
T.B.
T.L.
High limit thermostat
NOTE: L-N CONNECTION IS ADVISABLE
IWH02
X9 X8
TR1
CN1
X7
F1=2A
X5
X1
PAD
1
3
T.B.
T.L.
S.S.
-t°
X4
E.A./R.
TR2
X2
F.L.
230 V
aux
1
Analogue differential pressure switch
PAD
S.S.
Domestic hot water circuit temperature sensor (NTC)
Domestic hot water flow switch
F.L.
pu
violet
red
r
black
bk
gy
grey
pink
pk
blue
bl
br
brown
white
w
orange
or
6
VG
OPE OPE
1
2
3 4
MOD
V
1 2
3
4 5
pk
3
2 1
4
X2
230 V
N
L
M5
F= 3.15A
2 1
X1
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