Desa SMS24 - Manual (Page 11)

www.desatech.com 117536-01B 11
TROUBLESHOOTING
WARNING: Turn off log set and let cool before servicing. Only a
qualified service person should service and repair log set.
Note: All troubleshooting items are listed in order of operation.
POSSIBLE CAUSE
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 ir-
regular surfaces
1. Incorrect gas supply or
pressure
2. Blocked burner orifice or
burner manifold ports
3. Improper burner orifice size
REMEDY
1. Contact local natural gas
company
2. Adjust damper wide open
and/or have fireplace and vent-
ing 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 mani-
fold ports of any burrs, paint,
or other blockage
3. Verify proper burner orifice
sizing (see Figure 2, page 5)
OBSERVED PROBLEM
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.)
Burner is excessively noisy
(Note: The movement and com-
bustion of gas will create low,
unavoidable levels of noise.)
Burner flame is too low or too
high