WRDB - GB
Information about the heater
7
1.8 Electrical diagram
Fig. 3 Electrical diagram
2 Spark plug
3 Ionisation probe
15 Micro-switch
23 Ignition unit
24 Battery compartment
25 Servo valve (normally open)
28 Pilot valve (normally closed)
31 Temperature limiter
32 Monitoring of combustion gases
33 Diaphragm valve
34 LED - Burner status check
35 Switch / LED - Battery status check
41 Temperature sensor
42 Digital display
1.9 Function
This gas heater is equipped with automatic electronic
ignition which simplifies its operation.
B To do so, just turn on the switch (Fig. 9).
After this procedure, automatic ignition occurs
whenever a hot water tap is opened. First, the pilot
burner is lit and approximately four seconds afterwards
the main burner. The pilot burner flame is then
extinguished after a short period of time.
This is a way of saving a great amount of energy as the
pilot burner only operates for the minimum necessary
time to ignite the main burner, in contrast to
conventional systems which operate permanently.
If thishappens:
B Close and open the hot water tap to repeat the igni-
tion process until all the air has been purged.
Air in the gas supply pipe when the heater
is started up may cause ignition to fail.
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