Vanguard Heating VMH10TNB - Manual (Page 19)

19 107031
OWNER’S MANUAL
BURNER FLAME PATTERN
Figure 33 shows a correct burner flame
pattern. Figure 34 shows an incorrect burner
flame pattern. The incorrect burner flame
pattern shows the flame consistently higher
than one inch above the log.
If burner flame pattern is incorrect, as shown
in Figure 34
• turn fireplace off (see To Turn Off Gas to
Appliance, page 18)
• see Troubleshooting, pages 20 through 22
Figure 33 - Correct Burner Flame Pattern
Figure 34 - Incorrect Burner Flame Pattern
Top of Flame Consistently About
One Inch Higher Than Logs
Top of Flame About
One Inch Below Logs
INSPECTING
BURNER
Figure 31 - Correct Pilot Flame Pattern
(Actual Pilot May Vary From Illustration)
Figure 32 - Incorrect Pilot Flame Pattern
(Actual Pilot May Vary From Illustration)
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure 31 shows a correct pilot flame pattern.
Figure 32 shows an incorrect pilot flame
pattern. The incorrect pilot flame is not prop-
erly heating the thermocouple. This will cause
the thermocouple to cool. When the thermo-
couple cools, the fireplace will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 32
• turn fireplace off (see To Turn Off Gas to
Appliance, page 18)
• see Troubleshooting, pages 20 through 22
Thermocouple Pilot Burner
Pilot Burner Thermocouple