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Vermont Castings • Encore Model 2040-CAT-C Owner’s Manual_R14 • 2019 - ___ • 12/23 208390-204C
When to Suspect a Combustor Problem
The best way to evaluate the performance of your appliance’s
combustor is to observe the amount of smoke leaving the
chimney—bothwhenthecombustorhas“lighted-o󰀨”and
whenithasnot.Followthesesteps:
• Witharegoingandthecombustorproperlyactivated,with
the damper closed to route smoke through it as described
in the Operation Section, go outside and observe the
smoke leaving the chimney.
Then, open the stove damper and once again check the
smoke leaving the chimney.
You should see signicantly more smoke when thestove
damperis open and exhaust does not pass through the
combustor.However,becarefulnottoconfusesmokewith
steamfromwetwood.Steamdissipatesintheairquickly;
smoke does not.
Ifthistestindicatesaproblem,considerotherpossiblefactors
as well, such as the weather or a change in the quality of
yourfuel.Inwarmweather,draftisweakerthanitisincolder
winterweather,andrescanburnsluggishly.Small,hotres
are a good solution under these conditions.
Burning“green”(insu󰀩cientlyseasoned)woodwillresultin
poorer performance than burning properly seasoned fuel.
Reloadingwith green wood can also thermal shock the
catalyst, resulting in cracking, or the eventual fallout, of the
ceramichoneycombsubstrate.Youmayhavetorunyour
stovehotter(moreair)toachieveacceptableperformance
using green or wet wood.
Also, consider any changes in your operating routine.
Onceyouhaveruledoutanyotherpossiblecausesfora
decline in performance, inspect and clean the combustor if
necessary.Besuretoprotectanysurfaceyouuseforsetting
the stove parts aside.
Also, consider any changes in your operating routine.
Onceyouhaveruledoutanyotherpossiblecausesfora
decline in performance, inspect and clean the combustor if
necessary.Besuretoprotectanysurfaceyouuseforsetting
the stove parts aside.
Inspecting the Combustor
Removeaccessdoorandinnerrebrick.Removethecatalytic
combustorbyliftingupandpullingtowardsyou,Figure3.7.
NOTE
Burning“green”(insu󰀩cientlyseasoned)woodwillresult
in poorer performance than burning properly seasoned
fuel.Reloadingwithgreenwoodcanalsothermalshock
the catalyst, resulting in cracking, or the eventual fallout, of
themetalhoneycombsubstrate.Youmayhavetorunyour
stovehotter(moreair)toachieveacceptableperformance
using green or wet wood.
ST1180
catalyst access
Catalyst
Access Door
InnerFireback
Figure 3.7-Inspectthecatalyticcombustor.
To assure a long life for the combustor, it is recommended
to service the combustor on a regular basis based on the
amountofuse.Thisproceduretakesaboutve(5)minutes
andrequiresno tools except for a vacuum if cleaning is
necessary.
Cleaning the Combustor
1. Check the combustors honeycomb-like element for a
buildupofyash.Ifanyisevident,takethecombustor
outside and clean it by blowing air gently through it. Do
notpushanythingthroughthehoneycomb;donotuse
compressedairtoclearthepassages.Suchabrasioncan
scrapethethincoatingofplatinum(thecatalyst)o󰀨the
ceramic base, shortening the catalyst’s life and reducing
itse󰀨ectiveness.
2.Inspecttheelementfordamageordegradation.Although
small hairline cracks will not a󰀨ect performance, the
element should be essentially intact. If the element is
broken in pieces or has sections missing, it should be
replaced. Call your local Vermont CastingsAuthorized
Dealer for a replacement element.
3.Iftheelementisingoodconditionandclean,re-installit
inthestoveandreplacetherefractoryinnerrebackand
access door.
Operate the stove in your usual manner for two weeks,
inspecting the chimney and the chimney connector frequently
during this period.
If creosote does not build up as fast, it is likely that the
performance change was caused by y ash deposits on
thecatalyticelement.However,continuetheinspectionsof
the chimney system for a few weeks to ensure that proper
performance continues.
Ifyoucontinuetonda signicantcreosotebuildup or if
you continue to see excessive smoke from the chimney,
the catalytic element will need to be replaced. Contact your
nearestVermontCastings’AuthorizedDealerforinformation
about a replacement element.
NOTE: Use only the replacement catalyst supplied by a
VermontCastingsdealer.
20


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