Dyna-Glo BF20DTL-4 - Page 22

21
OPERATION
BURNER FLAME PATTERN
Fig. 28 shows a correct burner ame pattern. Fig. 29 shows an incorrect burner ame pattern with
lifting, and excessive ame height.
If burner ame is incorrect:
• turn heater off (see “To Turn Off Gas to Appliance”, page 19).
• see Troubleshooting, pages 23 through 26.
Fig. 28 - Correct/Normal Flame Pattern
with short ames with Control Knob Set
to High Flame (5)
Fig. 29 - Incorrect/Abnormal Flame Pat-
tern with tall ames with Control Knob
Set to High Flame (5)
NOTE: Ambient ame burners produce both a blue and yellow ame. An excessively high yellow
colored ame may be caused by airborne dust, dander, pet hair, etc. Additionally, an excess
amount of Mercaptane in the fuel can result in an orange or yellow colored ame.
The upper third of ame
may be bright yellow when
operated on propane.
When this heater is set for use on propane gas, the upper one third of the ame may be bright yellow.
When this heater is set for use on natural gas, a slight yellow tipping of the ame may occur.
1/2 Height of Rear
wall of the Reector
1/2 Height of Rear
wall of the Reector