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.
i
Air in the gas supply pipe when the heater
is started up may cause ignition to fail.
