6720648592 (2014/05)
Technical Characteristics and Dimensions | 7
2.8
Electrical diagram
Fig. 2
Electrical diagram
[1] Servo valve (normally open)
[2] Diaphragm valve
[3] Main valve (normally closed)
[4] Ionisation detector
[5] Igniter electrode
[6] Flue gas safety device
[7] Temperature limiter
[8] Igniter unit
[9] LED indicator for battery charge level
[10] LED indicator for burner status
[11] ON/OFF switch
[12] Batteries, 1.5V
[13] Microswitch
2.9
Function
This gas heater is equipped with
automatic electr
onic ignition
which simplifies its operation.
To do so, just turn on the switch (
Fig. 5).
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 exting
uished 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 mi
nimum necessary time to ignite
the main burner, in contrast
to conventional systems which
operate permanently.
If this happens:
Close and open the hot water
tap to repeat the ignition
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.
