andrews R18 Series, Техническая документация инструкция

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18IP22B
51
Fig. 32 Burner assembly
1 Burner location tabs
2 Burner assembly frame
3 Withdrawal direction from holder & injector
4 Lift burner out of notch at end
5 Ignition electrode
6 Sensing electrode
Each burner bar can be withdrawn from its injector.
With the burners removed check the injectors for any blockage
and if necessary clean in spirit. Remove the air guides located
beneath the burners and clean. Check the setting of the
modulating combustion air damper. See fig. 26, there should be
a gap of 8 mm with the damper in the fully closed position
against the stops (Natural gas) (see table 15a and 15b).
(11 mm LPG)
Check the condition of the ignition and sensing electrode at the
right hand end of the burner assembly. There should be no
burning of the metal tip and the ceramic should not be cracked.
Replace the burners starting with the pilot burner. Ensure that
the shaped venturi end at each burner locates properly over the
injector and that the tab at the end of the burner bar locates
fully in its notch.
Ensure that the insulation covered stainless steel channels are
correctly positioned as they guarantee the correct location of
the burners. The front tip of the channels locates over the
burner location tabs, see fig. 32.
Ensure that the ignition and sensing electrodes are correctly
positioned as shown in fig. 33. If the position or gaps are not
correct the electrodes must not be bent. In that case the elec-
trodes have to be replaced.