Service Manual for the Thermador Pro Grand Next Generation 48-Inch Natural Gas and LP Gas Ranges, Models:
PRG486JDG/01, PRL486JDG/01
58300000159722_ARA_EN_D
Page 13 of 92
3.3 Rangetop Flame Characteristics
Natural gas:
The rangetop burner flame color should be blue with no
yellow on the tips (see Figure 5). It is not uncommon to see orange in
the flame color; this indicates the burning of airborne impurities in the
gas, and will disappear with use. See Figure 6 for additional flame
characteristics.
LP gas:
Slight yellow tips on the primary flame cone are normal and
may appear after a few minutes. The flame should be stable with no
excessive noise or fluttering. Orange colored streaks in the flame are
produced from burning airborne debris, which is normal at startup,
and should dissipate in a few minutes (see Figure 6).
When the flame is properly adjusted, it should burn completely around
the burner cap, at each burner port (see Figure 4, page 12).
Figure 5: Correct Flame Color and Characteristics
1
Dark blue
2
Secondary cone
3
Light blue
4
Primary cone
Figure 6: Additional Flame Characteristics
NOTE:
If rangetop burner/flame characteristics are not adequate, see
Troubleshooting Burners, Flame, and Ignition,
page