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RP-HRPD-IOM (07-22) 132210-B
MAINTENANCE—CONTINUED
Maintenance Procedures—Continued
Cleaning Pilot and Burners
⚠ WARNING ⚠
To prevent injury when cleaning pilot and burners, wearing eye protection is recommended.
⚠ CAUTION ⚠
To prevent damage to pilot orifice, do not ream the orifice.
If the pilot flame appears short and/or yellow, check the pilot orifice for blockage caused by lint or dust accumulation .
1 . Remove the pilot orifice and clean it using compressed air .
2 . Check and clean the aeration slot in the pilot burner .
3 . Clean the metal sensing probe and the pilot hood with an emery cloth and wipe off the ceramic insulator .
4 . Check the spark gap (see
), which should be maintained to 7/64 inch .
Figure 20. Pilot Assembly Spark Gap
5 . After the pilot is cleaned, blow away any dirt using compressed air .
6 . Clean the main burners and burner orifices using compressed air .
⚠ CAUTION ⚠
When cleaning burner ports, do not use anything that might change the port size.
7 . Use an air nozzle to blow out scale and dust accumulation from the burner ports . Alternate blowing compressed
air through the burner ports and then through the venturi . Use a fine wire to dislodge any stubborn particles from
the burner ports .
8 . Clean the burner rack carryover systems using compressed air .
