New Buck Corporation FP-BR-10-ZC - Manual (Page 26)

FLAME CHECK
A periodic check of the flames should be made. The pilot flame should always be present when
the gas logs are in operation.
FLAME: Propane (LP) should produce a flame that is 3"-4" above rear log. This flame should
be yellow.
Natural gas should produce a flame that is 3"-4" above rear log. This flame should
be mostly blue except for the top 1/2" which should be yellow.
FLAME
NATURAL
PROPANE
Page 24