5.11.3 Electrical wiring with valve seal control
(DUNGS VPS 504)
Key (Fig. 18)
B4
Operating signal
h1
Hour counter
ID
Differential circuit breaker
PG
Min. gas pressure switch
S3
Remote lock-out signal (230V - 0.5A max.)
T6A
Fuse
TL
Limit thermostat
TS
Safety thermostat
VPS
Valve leak detection control
V10
Safety valve
V11
Adjustment valve
X6
6 pin plug
X7
7 pin plug
D4239
Installation
5.11.4 Ionisation current
The minimum current necessary for the control box operation is
3 µA. The burner normally supplies a higher current value, so that
no control is needed. Anyway, if you want to measure the ionisa-
tion current, you need to open the connector (CN1)(Fig. 17) on
the red wire and insert a microammeter as shown in Fig. 19.
Control box
D5006
21
GB
Fig. 18
Connector
Probe
Fig. 19
20064609