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OPERATING INSTRUCTIONS
Page 10 62.9534.01_UL
3.1 GAS BURNER
So far as is necessary, the pilot burner and main burner are
cleaned by after-sales service.
3.2 FLAME
In a visual check, the flames must be dark blue without any
upper yellow or orange tips; they must be stable and soot-free
and adhere firmly to the outlets.
If there is a lack of primary air, the flame has yellow streaks
and tips; if there is too much primary air, the flame is short,
transparent and tends to lift off the burner.
When the flame is correctly adjusted, it must not lift off or back-
fire when the burner is cold as well as warm.
The flame will backfire into the inside of the burner when the
speed of the gas-air mixture through the burner outlets is too
low, particularly when the air passages are dirty.
The different ignition processes must also take place without
any delays. This concerns: ignition, arc-through and. extending
the flame over the whole burner area.
If the flame fails to meet all the requirements, cleaning or
maintenance is necessary.
4. MALFUNCTION
The burners are not accessible to operating personnel.
Therefore, in the case of a fault, specialist staff must be reque-
sted.
5. STORAGE SPACE
The storage space (Fig.10) is incorporated into the base unit.
Recommended accessories:
- Shelf holder (1) 2 off.
- Shelves (2) 1 off.
Malfunction Possible cause Remedy
Flame smokes. • Gas mix too rich.
• Partially blocked burner
gaps.
- Inform Customer Ser-
vice.
Long yellow flame tips. • Mixing tube narrowed by
dirt.
- Inform Customer Ser-
vice.
Flame lifts off. • Exit velocity too high due
to blocked burner gaps.
• Deformed burner cover.
• Pressure regulator on
gas cylinder not opera-
ting correctly.
- Inform Customer Ser-
vice.
Flame flashes back. • Mixture too lean.
• Insufficient exit velocity
at burner gaps.
• Soiled airways
• Blocked nozzle.
• Deformed or burnt-out
burner cover
- Inform Customer Ser-
vice.
No flame or flame too
small.
• Blocked nozzle or mixer
tube.
• Blocked gas tap.
• No gas.
• Insufficient gas pres-
sure.
- Inform Customer Ser-
vice.
- Check gas tap setting.
No flame at low setting. • Blocked low setting
nozzle.
- Inform Customer Ser-
vice.
Pilot burner
No flame. • Blocked burner gaps.
• Blocked nozzle.
- Clean pilot burner cap.
Flame goes out after con-
trol valve release.
• Thermo-element insuf-
ficiently heated (dirty?)
• Defective thermo-ele-
ment
- Inform Customer Ser-
vice.
Flame too small or too
large.
• Primary air ratio adju-
sted.
• Nozzle blocked.
- Inform Customer Ser-
vice.
1 Shelf holder
2 Shelves
Fig.10 Storage space