Manual Vermont Castings Dauntless FlexBurn (page 10 of 28) (English)

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Vermont Castings • Dauntless FlexBurn Owner’s Manual_R17 • 2020 - ___ • 09/2310 3-90-586000C

The catalyst will initiate combustion of smoke and particulates

at500°-600°F(260°-315°C),halfthetemperaturenormally

requiredforunaidedsecondarycombustion.Ifyoufollowed

the startup operation steps in the previous section the stove

willbesu󰀩cientlyhottoallowthecombustortowork.Once

the combustor starts working, heat generated by burning

the smoke will keep it working.

To determine whether the combustor is operating, refer to

the temperature probe which shows the operating range of

the catalytic combustor. This is located on the back of the

stove and is viewed from the top.

NOTE:Itwilltakeseveralminutesafterclosingthebypass

damper for the temperature probe to fully adjust to the new

temperature. If the probe indicator is below the operate

catalyst range, add fuel or open the bypass damper to allow

theretofurtherbuildbeforeengagingthecatalystagain.

Ifthe probeindicatorisabovetheoperatecatalystrange,

the catalytic combustor is running too hot and may be

damaged.In many cases, decreasing the primaryair can

reduce the catalyst temperature and adding less wood with

each loading can also help if overheating is persistent. Do

not add wood to the stove if the probe reads above the

operate catalyst range.

Avoidusingafullloadofverydrywoodintherebox,such

as dry slab wood or wood with below 14% moisture content.

This may result in continuous very high temperatures in the

secondary combustion area and damage the combustor.

Never burn treated wood, garbage, solvents or trash. All of

these may poison the catalyst and prevent it from operating

properly. Never burn cardboard or loose paper except for

kindling purposes. Never burn coal; doing so can produce

soot or large akes of char or y ash that can coat the

combustor and cause smoke to spill into the room. Coal

smoke can also poison the catalyst so that it won’t operate

properly.

NOTE: The catalytic combustor is fragile and will crack if

subjected to thermal shock. Thermal shock can occur when

refueling with wet wood or closing the bypass damper too

early after refueling.

For best results when refueling, wear long-cu󰀨ed stove

gloves to protect your hands and forearms.

Reloading a hot stove:

Whenawoodloadisaddedtoahotbedofcoals(continuous

use),openthebypassdamperandeitherthe top or front

loading doors. Stir the hot coals to allow ash to fall through

thegrate.Hotcoalsshouldthenbepushedagainsttherear

wall and leveled depending on the amount of coals. Add

fresh wood and close the loading door and bypass damper.

Ifthecoalsareglowingandhot,itispossibletosettheair

control to any setting immediately after loading the stove.

Reloading a warm stove:

If the stove is relatively cold (for instance after a long

overnightburn),thecoalbedmayneedtobere-energized

priortoaddingalargeloadofwood.Openthebypassdamper

and either the top or front loading door. Stir the coals to

allow ash to fall through the grate. Push the remaining coals

towardtherearwall.Closethedoor(s)andbypassdamper

and set the primary air to the highest position. Allow the

coalstore-igniteandheatthesystemfor10to15minutes.

Oncethecoalsareglowing,afreshbatchofwoodmaybe

addedfollowingthe“hotstove”procedureabove.

A proper bed of coals is critical to the performance of the

Dauntless stove. The rear refractory wall of the stove should

be almost entirely white in color with proper operation. This

indicates the combustion system is running at a proper

elevatedtemperature.Iftherearwallisblackwithcreosote

or develops a dark brown color, it is likely that the coal bed

isnotsu󰀩ciencylargeenoughorhotenough.Revisitthe

above instructions and adjust the amount of kindling or time

at high air settings to get the system hotter. Wood size or

excessive moisture may also cause lower than desirable

stove temperatures.

While not required, operating your stove with the catalytic

combustor installed creates optimum conditions for

secondarycombustionandwillincreaseyoure󰀩ciencyup

to 15% on low burn, making sure you get the most heat out

of each load of wood.

The catalytic element is a “honeycomb” coated with

the catalytic material. The element sits at the bottom

of the secondary combustion chamber. Smoke, gases

and particulates that are not fully combusted during the

secondary combustion process pass through the catalyst,

creatingatertiaryburn.Thisresultsinhighere󰀩ciencyand

lower emissions.

WARNING

DO NOT OPERATE THE STOVE WITH THE ASH

DOOR OPEN. OPERATION WITH THE ASH DOOR

OPEN CAN CAUSE AN OVER-FIRING CONDITION TO

OCCUR. OVER-FIRING THE STOVE IS DANGEROUS

AND CAN RESULT IN PROPERTY DAMAGE, INJURY

OR LOSS OF LIFE.

ClockwisetoOpen

Counterclockwise

to Close

Figure 2.6-Toopenthefrontdoors,turnthehandleclockwise.

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Vermont Castings Dauntless FlexBurn Manual

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