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12. Primary air adjustment
The primary air is fixed and sealed by the producer according to the country of use
and the gas type required. The adjustment is mentioned on the packing and the
type shield.
If a gas change must be undertaken, the primary gas adjustment must follow the
table below:
Gas type
Pressure
mbar
Primary air opening
in the nut
mother (B)
on the
injector (A)
Earthgas H, E
G20
20
fully open
closed
Earthgas L, LL G25 20/25
17 mm open
closed
Liquid gas
G30 50
15 mm open
closed
Liquid gas
G30 28 - 30/37 fully opened
fully open
If required only miner adjustment may be undertaken.
After fixing the primary adjustment, the nut mother and the fixing screw on the injector must be sealed with
lacquer.
13. Tests
After a conversion the following requirements must be fulfilled:
Nozzle diameter and pressure must be identical to the indication of the producer
The tightness of all gas pipes and parts must be secure
Ignition, through ignition, over ignition must be guaranteed for full combustion and small
combustion operation
The flame may not lift off nor beat back to the nozzles
All burners, ignition and control arrangements must be checked for dirt, secureness and function
The closing time of the thermo electric ignition control may not exceed 60 seconds
14. Sticker
Ater a conversion of a gas type has been carried out a new sticker must be placed on the appliance which
shows clearly the new gas type and gas pressure.
