Gas fired igniter ZA0 / ZDA0
Functional characteristics and structure
Status: 11-2018
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5
Functional characteristics and structure
5.1
Functional characteristics
The gas fired igniter is a device whose flame is designed to ignite
and support a main burner. A high voltage is generated from an
input voltage (mains voltage), which generates an ignition spark at
the gas nozzle. The resulting flame generates a flame signal via
the flame rod. This flame signal is amplified in the ionisation flame
monitor and enables the main burner.
5.2
Structure
Fig. 6: Gas fired igniter (sectional drawing)
1
Power head
1.1 Ionisation flame monitor
1.2 Spark transformer
1.3 Electrical plug
1.4 Allen screw
1.5 Contact spring
3
Gas pressure test nipple (opposite gas port)
4
Allen screw
5
Air pressure test nipple
6
Outer tube
7
Intermediate support ring with two ceramic
insulators
8
Connecting rods
9
Gas tube
10 Final electrode support ring
11 Gas nozzle
12 Ignition electrode
13 Flame rod
14 Air port
15 Mixing chamber
16 Mounting flange
17 Earth rod
18 Ceramic insulator
The gas fired igniter comprises the following main components:
the power head (1), in which the spark transformer (1.2) and the
ionisation flame monitor (1.1) are mounted,
the complete outer tube (6), incl. mixing chamber (15) and
mounting flange (16) with air port (14),
the gas tube (9) and the gas nozzle (11),
the final electrode support ring (10) with two ceramic insulators
(18), ignition electrode (12), flame rod (13) and earth rod (17).
