3387
10
GB
3.7.2 ELECTRICAL WIRING WITH GAS LEAK CONTROL DEVICE (DUNGS VPS 504)
KEY TO LAY-OUT
B5
– 2
nd
stage lock-out signal
h1
– 1
st
stage Hour counter
h2
– 2
nd
stage Hour counter
PG
– Min. gas pressure switch
S3
– Remote lock-out signal
(230V - 0.5 A max.)
T6A
– Fuse
TL
– Limit thermostat
TR
– 2
st
stage thermostat
TS
– Safety thermostat
V10
– Safety valve
V11
– 1
st
stage valve
V12
– 2
st
stage valve
X4
– 4 pin plug
X6
– 6 pin plug
X7
– 7 pin plug
Connect the 2nd stage thermostat (TR) to terminals
T6
-
T8
and
remove the bridge.
220/230V
~
50/60Hz
D4371
TO BE DONE BY
THE INSTALLER
CONTROL BOX,
(see Fig. 8)
To remove the control box from the burner it is necessary to:
disconnect all the connectors, the 7-pin plug, the high voltage cables and
the earth wire (
TB
);
unscrew the bolt (
A
, Fig. 8) and pull the control box in the direction of the
arrow.
To install the control box it is necessary to:
screw the bolt (
A
) in at a torque of 1 - 1.2 Nm;
reconnect all the connectors previously disconnected.
A
Fig. 8
E9250
IONIZATION CURRENT
The minimum current necessary for the control box
operation is 5
μ
A.
The burner normally supplies a higher current value,
so that no check is needed. Anyway, if you want to
measure the ionization current, you have to open the
connector
(CN1)
(see electrical scheme page 9) fit-
ted on the wire and insert a microammeter.
D4631
+
_
SO
CN1
Fig. 9
