Installation Guide
www.usaprocom.com
23200199-01B
INSPECTING BURNERS
IMPORTANT: Owner’s should check pilot ame pattern and burner ame pattern often. 
Incorrect  ame  patterns  indicate  the need  for  cleaning  (see  Care and Maintenance, 
page 24 or service.
 WARNING: Only a qualied service person should service and 
repair heater. This includes maintenance requiring replacement or 
alteration of components.
PILOT FLAME PATTERN
Figure 26 shows a correct pilot ame pattern. 
Figure 27 shows an incorrect pilot ame pat-
tern. The incorrect pilot ame is not touching 
the  thermocouple. This  will  cause  the  ther-
mocouple to cool, which shuts the heater off.
If  pilot  ame  pattern  is  incorrect,  as  shown 
in Figure 27
•  turn heater off (see To Turn Off Gas to Ap-
pliance, page 19 or 20)
•  see Troubleshooting pages 25 through 29.
 WARNING: If yellow tipping 
occurs, your heater could pro-
duce increased levels of carbon 
monoxide.  If  the  burner  ame 
pattern shows yellow tipping, 
follow instructions at bottom of 
this page.
Notice: Do not mistake orange ames with 
yellow tipping. Dirt or other ne particles enter 
the heater and burn causing brief patches of 
orange ame.
Figure 26 - Correct Pilot Flame Pattern 
(Natural Gas shown)
Figure 27 - Incorrect Pilot Flame Pattern 
(Natural Gas shown)
NG
3-3.5" WC
Natural Gas
Shown
LP
8-11" WC
NG
3-3.5" WC
Natural Gas
Shown
LP
8-11" WC
Approx. 3"-6" Above Top of Logs
More Than 8" Above Top of Logs
Approx. 3"-6" Above Top of Logs
More Than 8" Above Top of Logs
Figure 28 - Correct Burner Flame Pattern
Figure 29 - Incorrect Burner Flame 
Pattern
BURNER FLAME PATTERN
Figure 28 shows a correct burner ame pattern. Figure 29 shows an incorrect burner ame 
pattern. If burner ame pattern is incorrect as shown in Figure 29:
•  turn heater off (see To Turn Off Gas to Appliance, page 19 or 20).
•  see Troubleshooting pages 25 through 29.
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in the tting at the entrance to the burner. These 
holes may become blocked with dust or lint. Periodically inspect these holes for any blockage 
and clean as necessary. Blocked air holes will create soot.










