Inspecting Burners - Procom WZN18HLA Manual

IMPORTANT: Owner's should check pilot flame pattern and burner flame pattern often.
Incorrect flame patterns indicate the need for cleaning (see Care and Maintenance,
page 24) or service.
WARNING: Only a qualified service person should service and
repair heater. This includes maintenance requiring replacement or
alteration of components.
Figure 31 shows a correct pilot flame pattern.
Figure 32 shows an incorrect pilot flame pat-
tern. The incorrect pilot flame is not touching
the thermocouple. This will cause the ther-
mocouple to cool, which shuts the heater off.
If pilot flame pattern is incorrect, as shown
in Figure 32
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 21 or 22)
• see Troubleshooting pages 25 through 28.
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If the burner flame
pattern shows yellow tipping,
follow instructions at bottom of
this page.
Figure 33 shows a correct burner flame pattern. Figure 34 shows an incorrect burner flame
pattern. If burner flame pattern is incorrect then:
• turn heater off (see To Turn Off Gas to Appliance, page 21 or 22).
• see Troubleshooting pages 25 through 28.
Approx. 3"-6" Above Top of Logs
Figure 33 - Correct Burner Flame Pattern
More Than 8" Above Top of Logs
Air is drawn into the burner through the holes in the fitting 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.
200068-01A

INSPECTING BURNERS

PILOT FLAME PATTERN
BURNER FLAME PATTERN
BURNER PRIMARY AIR HOLES
www.usaprocom.com
Notice: Do not mistake orange flames with
yellow tipping. Dirt or other fine particles enter
the heater and burn causing brief patches of
orange flame.
HLA Model Shown
Thermocouple
Figure 31 - Correct Pilot Flame Pattern
Thermocouple
Approx. 3"-6" Above Top of Logs
Figure 32 - Incorrect Pilot Flame Pattern
More Than 8" Above Top of Logs
Figure 34 - Incorrect Burner Flame
Pattern
Pilot Burner
23