Gas fired igniter ZA0 / ZDA0
Installation and initial commissioning
Status: 11-2018
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Fig. 12: Installation of the gas fired igniter
Thread size
Tightening
torque
M 4
2.5 Nm
M 5
5 Nm
M 6
7 Nm
M 8
15 Nm
1/8“
5 Nm
1/4“
7 Nm
1/2“
10 Nm
3/4“
15 Nm
1“
15 Nm
1 ½“
20 Nm
2“
25 Nm
2.
Push the gas fired igniter into the installation opening.
3.
Tighten the mounting flange (1) using two or four suitable
screws. (Observe the max. torque specified in the table, use a
suitable tool). Select the screw lengths in line with the wall
thickness.
4.
At the air port (2), connect a air regulating sleeve for air
volume setting.
5.
Connect the combustion air at the air regulating sleeve.
NOTE!
Excessive temperature can cause damage!
In igniters which are designed to permit division or
swivel action, the temperature at the dividing or
swivel joints can cause damage to the gas fired
igniter.
– The temperature at the dividing / moving point
must not exceed 180 °C.
REMARK!
Permanent cooling must be provided. At an
ambient temperature of the outer tube between
300
– 500 °C, the combustion air shall be partly
(> 20 %) switched as cooling air.
At an ambient temperature between 500
– 700 °C,
proceed as follows:
- Switch combustion air completely as cooling air
- Use stainless steel outer tube
- Provide additional cooling air in the annular gap
between the guide and the outer tube
In the case of an ambient temperature > 700 °C,
contact Hegwein.
WARNING!
Danger of burns due to wrong type of gas!
Using an incorrect gas type can cause too large an
ignition flame to emerge from the gas fired igniter.
This entails a risk of fatal injury due to serious
burns and danger of fire.
– Only connect the gas fired igniter to the gas
type indicated on the rating plate.
6.
At the gas port, connect a Ballofix ball valve for gas volume
setting.
7.
Connect the gas line at the Ballofix ball valve.
