Gas fired igniter ZA0 / ZDA0
Installation and initial commissioning
Status: 11-2018
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6.5
Setting the required gas volume
This may only be performed by trained personnel.
Additionally required safety equipment:
Face protection
Protective gloves
Required special tools:
Customarily available pressure gauge with a measurement
range of 0
– 200 mbar
DANGER!
Risk of explosion due to gas leaks!
An accidental gas leak can cause an explosion or
serious burns!
– Only unscrew the Allen screw of the gas
pressure test nipple for the duration of the test.
– Never allow any naked flame or ignition source
to enter the danger area.
1.
Define the required gas volume on the basis of the relevant
characteristic curve in the gas volume diagram.
As a rule, the gas operating pressure is 100 mbar above
combustion chamber back pressure.
REMARK!
If a higher gas inlet pressure was specified in the
order, then pressure reducing orifices have already
been screwed into the two gas inlet threads in the
factory. The igniter is consequently adapted for gas
inlet pressures above 150 mbar.
Precision setting is performed using the Ballofix
ball valve.
In case of gas inlet pressures above 500 mbar, this
setting is extremely difficult. In these cases, the
pressure reducing orifices must be retrofitted.
When ordering pressure reducing orifices, specify
the gas inlet pressure.
REMARK!
The illustrated diagram is based on average values
in respect of gas density, gas composition, calorific
value, igniter version, igniter tube length and
optimum ambient conditions, such as free burn-out
and pressureless combustion chamber. The gas
operating pressure values determined from the
diagram must consequently be viewed as guideline
values. Depending on the plant conditions, the
actually required values may deviate from this.
