Design Dynamics VTD-24N-JHB - Manual (Page 11)

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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 REMEDY OBSERVED PROBLEM
1..Poor.fuel.quality
..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 orifice 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
flames contact logs..
Burner. is. excessively. noisy.
(Note: The movement and
combustion of gas will cre-
ate low, unavoidable levels
of noise.)
Burner flame is too low or
too.high
1..Contact.local.gas.supplier
2. Adjust damper wide open
and/or have fireplace and
venting. professionally.
cleaned.and.checked
3..Remove.any.foreign.items.
from flame pattern and/or
check. for. proper. orifice.
sizing
4. Preheat flue in very cold
weather.
1..Relieve.any.tight.bends.or.
kinks.in.gas.supply.line
1..Check.for.proper.gas.sup-
ply.pressure
..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)