Design Dynamics VTD-18N-JHB Gas Heater User Manual


 
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114370-01E 11
TROUBLESHOOTING


Note: All troubleshooting items are listed in order of operation.
POSSIBLE CAUSE REMEDY
OBSERVED PROBLEM
1. Poor fuel quality
2. Fireplace venting system
not drafting properly
3. Improper fuel/air mix
4. Excessive gas supply or
pressure
1. Passage of air or gas
across irregular surfaces
1. Incorrect gas supply or
pressure
2. Blocked burner orice or
burner manifold
3. Improper burner orifice
size
Log set is smoking/sooting
excessively
(Note: It is natural and un-
avoidable for vented gas log
sets to produce moderate
levels of carbon (soot) where
ames contact logs.
Burner is excessively noisy
(Note: The movement and
combustion of gas will cre-
ate low, unavoidable levels
of noise.)
Burner ame is too low or
too high
1. Contact local gas supplier
2. Adjust damper wide open
and/or have replace and
venting professionally
cleaned and checked
3. Remove any foreign items
from ame pattern and/or
check for proper orifice
sizing
4. Preheat ue in very cold
weather.
1. Relieve any tight bends or
kinks in gas supply line
1. Check for proper gas sup-
ply pressure
2. Free burner orifice and
manifold ports of any burrs,
paint or other blockage
3. Verify proper burner ori-
fice sizing (see Figure 2,
page 6)