Electrical Wiring With Valve Seal Control (Dungs Vps 504); 5.11.4 Ionisation Current - Riello 556T40 Installation, Use And Maintenance Instructions

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
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