14
901049
VENTED NATURAL GAS LOGS
TROUBLESHOOTING
WARNING: Turn off log set
and let cool before servicing. Only
a qualified service person should
service and repair log set.
POSSIBLE CAUSE
REMEDY
OBSERVED PROBLEM
Note:
For additional help, visit DESA
International’s technical service web site
at
www.desatech.com
.
Note:
All troubleshooting items are listed in
order of operation.
1. Poor fuel quality
2. Fireplace venting system not drafting
properly
3. Excessive flame impingement or
blockage
4. Improper fuel/air mixture
5. Excessive gas supply/pressure
1. Passage of air/gas across irregular sur-
faces
1. Incorrect gas supply or pressure
2. Blocked burner orifice or burner mani-
fold ports
3. Improper burner orifice size
Log set is smoking/sooting excessively
(
Note:
It is natural and unavoidable for
vented gas log sets to produce moderate
levels of carbon (soot) where flames
contact the logs. This is especially true
with propane/LP gas.)
Burner is excessively noisy
(
Note:
The movement and combustion of gas
will create low, unavoidable levels of noise.)
Burner flame is too low or too high
1. Contact local natural or propane/LP gas
company
2. Adjust damper wide open and/or have
fireplace and venting professionally
cleaned and checked
3. Separate the logs to allow more flame
passage
4. Remove any foreign items from the
flame pattern and/or check for proper
orifice sizing
5. Preheat flue in very cold weather
1. Relieve any tight bends or kinks in gas
supply line
1. Check for proper gas supply pressure
2. Free burner orifice and manifold ports
of any burrs, paint, or other blockage
3. Verify proper burner orifice sizing (see
Figure 4, page 7)
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