43
I-SCE (09-18) PN207697R9
b. Disassemble burner rack
NOTE: Natural gas burner racks manufactured before Series 6 may have a lighter tube carryover
system. Break the lighter tube connection at the orifice and remove the supply tubing, the drip
shield, and the lighter tube.
(1) For natural gas burner rack, remove flash carryover system from manifold end of burner rack.
(2) For propane gas burner rack, break lighter tube connection at regulator and remove lighter tube orifice
supply tubing; remove retaining screws in drip shield and remove shield; remove retaining screws and
slide out lighter tube
(3) Pull main burners horizontally away from injection opening and lift out
(4) Remove manifold bracket screws and remove manifold
(5) Remove burner orifices
(6) Remove screws and lift out pilot burner
c. Clean burner rack in accordance with instructions in Cleaning Pilot and Burners
d. Re-assemble and re-install burner rack by reversing above steps, being careful not to create any unsafe
conditions
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.
• Remove the pilot orifice and clean it using compressed air.
• Check and clean the aeration slot in the pilot burner.
• Clean the metal sensing probe and the pilot hood with an emery cloth and wipe off the ceramic insulator.
• Check the spark gap (see Figure 37), which should be maintained to 0.100 inch (2.5 mm).
Figure 37. Pilot Assembly Spark Gap
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