HearthStone Outdoor Wood Fired Cooking Oven 4.0 User manual

Page | 1 Outdoor Cooking Oven 4.0
Manual: 6400-41429
R: 7/21/2021
Outdoor Wood
Fired Cooking
Oven 4.0
(Model 800-40WO15)
OWNER'S MANUAL
Installation And
Operating Instructions
SAVE THIS OWNER’S MANUAL
FOR FUTURE REFERENCE
PLEASE READ THIS ENTIRE OWNER’S MANUAL BEFORE YOU INSTALL AND USE YOUR NEW
COOKING OVEN.
If this oven is not properly installed, a house fire may result.
To reduce the risk of fire, follow the installation instructions.
FOR MORE INFORMATION AND ACCESSORIES,
VISIT WWW.HEARTHSTONESTOVES.COM
CONTACT LOCAL AUTHORITIES WITH JURISDICTION (BUILDING DEPARTMENT or FIRE
OFFICIALS), ABOUT PERMITS REQUIRED, RESTRICTIONS AND INSTALLATION
INSPECTION IN YOUR AREA.
WARNING: This product can expose you to
chemicals including glass wool fiber and carbon
monoxide which are known to the State of California to
cause cancer, birth defects or other reproductive harm.
For more information go to www.P65Warnings.ca.gov
California Prop 65

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Manual: 6400-41429
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TABLE OF CONTENTS
SAFETY INFORMATION.........................................................................................................3
SPECIFICATIONS...................................................................................................................4
INSTALLATION.......................................................................................................................5
OPERATION...........................................................................................................................X
MAINTENANCE .....................................................................................................................X
TROUBLESHOOTING ...........................................................................................................X
SAFETY LABEL.....................................................................................................................X
LIMITED WARRANTY.............................................. ERROR! BOOKMARK NOT DEFINED.X

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SAFETY INFORMATION
Read and understand this Owner's Manual thoroughly before installing and using this oven.
Make sure to install your oven:
•According to the manufacturer's recommendations
•In accordance with all applicable codes
When using your oven, follow these safety precautions:
•Never modify this oven in any way.
•Do not move the oven during use or while it is hot.
•Never burn painted or treated wood in this stove.
•DO NOT BURN GARBAGE. Never burn garbage or trash, solvents, plywood, artificial logs, cardboard, or driftwood, in
this oven.
•Never burn coal in this stove.
•DO NOT BURN OR STORE FLAMMABLE FLUIDS NEAR THE OVEN.
•DO NOT USE CHEMICALS OR FLUIDS TO START THE FIRE. Never use gasoline, kerosene, charcoal lighter fluid,
or other flammable fluids to start or invigorate the fire. These fuels will cause dangerous burning conditions in the stove.
Keep all such materials away from the stove.
•Never use plastic dishes, containers, or utensils in the oven.
•Never put articles of clothing, pot holders/hot-mitts, or other fabric on a hot stove.
•Never connect the stove to a flue used by another appliance.
•Keep all combustible items such as furniture, drapes, clothing, and other items, at least 36" (0.92 m) from the oven
•Keep a fire extinguisher handy. We recommend the type rated "A B C."
•Never extinguish the flames using water. When cooking is completed, close the door on the unit and let the fire die out
naturally.
•Do not touch the metal door or flue pipe while in operation. They are not insulated and will get hot. Only handle the
door by the wooden door handle.
•Dispose of ashes properly.
•Keep children and pets away from the stove when it is burning; they could be seriously injured by touching a hot stove.
•Clean your chimney system as needed.
EMERGENCY PROCEDURES
If you have a chimney fire or an out-of-control fire, follow these instructions:
1. If the fire is too threatening, leave the area and call the fire department immediately! If not, perform the next
three steps.
2. Close the door on the oven, let the fire burn down in the firebox.
3. Once the fire in the oven has died out completely. Inspect the oven and chimney thoroughly for any sign of
damage before firing the oven again. You must correct any damage before using your oven again.
•WARNING: DO NOT ATTEMPT TO PUT OUT A CHIMNEY FIRE BY THROWING WATER ONTO THE OVEN, OR
CHIMNEY. THE EXTREMELY HIGH TEMPERATURE OF SUCH FIRES CAN CAUSE INSTANTANEOUS STEAM AND
SERIOUS BODILY HARM.

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Manual: 6400-41429
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SPECIFICATIONS
Firebox Capacity: 4.0 cubic feet of cooking space
Pizza Capacity: 2 - 12” Pizzas
Maximum Log Length:Up to 22” (56cm)
Oven Weight: 175lbs (80kg)
Packaging Dimensions: 41”x41”x23” (104x104x59cm)
Maximum Oven Temperature: 1000°F (500°C)
Baking Stones: 1-1/4” Soapstone
Oven Body Material: Stainless Steel
Recommended Log Diameter: 2” (5cm)
Chimney Diameter: 5” (13 cm)
Dimensions in inches [millimeters]

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INSTALLATION REQUIREMENTS
Choose a place to install your Outdoor Cooking Oven.
Inspect this location to make sure that the oven and chimney pipe will have the required clearance from combustible
materials that are near the oven (see page 6). Combustibles include walls, floor, ceiling, fences, sun shades, curtains, and
furniture. You must carefully consider the clearances to all of these combustibles before actually connecting your oven.
Only install the oven on a flat, stable surface. If needed, the feet of the oven are adjustable to level the unit.
If a wheeled cart or table is used, the wheels must be locked or chocked when in use and permanently fixed if a through
the roof venting system is installed.
If the floor or table where the unit will be installed is made of combustible material, then a non-combustible floor protector
is required between the floor/table and the oven. An example of a non-combustible floor or table protector is a surface
constructed with a continuous layer of tile, brick, slate, glass, steel or another non-combustible facing. There is no R-value
requirement under the appliance.
Clearances to NFPA Code 211 Protected Surfaces
You can reduce the clearances to combustible surfaces by using any National Fire Protection Agency (NFPA) approved
wall protection system with additional approval of the regulatory authority having jurisdiction in your area. Please refer to
NFPA Code 211 for specifications and complete details. You can obtain this information directly from the NFPA.
National Fire Protection Agency
Batterymarch Park
Quincy, MA 02269
1-800-344-3555
1-617-770-3000
www.nfpa.org
FLUE REQUIREMENTS
Your cooking oven is supplied with a 20”section of 5”diameter flue pipe and a flue cap. These must be installed for
safe operation of your oven.
Your oven must be installed without any obstructions or combustible objects over the flue cap, such as an open patio
without a roof covering.
It is possible to use an alternative flue pipe if a longer section of chimney or a through roof installation is needed. We
recommend using Duravent 5”chimney system products, though other UL listed chimney products are available through
other manufacturers.
DO NOT INSTALL YOUR OUTDOOR COOKING OVEN UNDER A ROOF OR IN A CLOSED PATIO ROOM WITHOUT
A UL LISTED THROUGH-THE-ROOF CHIMENY SYSTEM INSTALLED. CHECK WITH YOUR LOCAL BUILDING
CODES BEFORE INSTALLING IN A CLOSED IN PATIO TYPE ROOM.

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Clearances to combustibles:
Dimensions in inches [millimeters]
UNPACKING THE OVEN

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OPERATION
Start small with your first fire, the soapstone baking stones need a slow initial heat up to cure the stones and drive the
moisture from the stones.
We recommend only using dry, split cordwood for fueling your cooking oven. Do not use treated woods, artificial
(compressed wood) logs, construction lumber (2x4’s) or yard debris.
Soft woods like Pine, Douglas fir, Spruce, or Tamarac are strongly discouraged. They contain a great deal of pitch and
resin which will result in excessive smoking and will cause strange flavors in the cooked food.
Properly dried hardwood fuel works much better, produces more heat, and can add additional flavors to the food
depending on species selected.
Ensure all flue pipe and flue cap are in place and secured before starting a fire
LIGHTING A FIRE
1. Begin with filling the wood rack with kindling. Kindling is typically no larger than 3/4”thick
pieces of wood. Bury two or three pieces of crumpled paper in the kindling pile. Stack the
kindling in a crisscross orientation over the paper and allow for air gaps between pieces.
2. Put the wood tray into the oven, all the way to the left of the oven cavity. Center the wood
tray front to back in the oven cavity. All wood burning should happen in the wood tray, with
the tray pushed all the way to the left of the oven cavity. This will guarantee the most
accurate reading of the cavity thermometer.
3. Light the paper. Put the door on the unit, but leave the door spaced out 2”from the front of
the unit while the fire gets started. This will allow for oxygen to feed the fire, and will prevent
smoke from coming out of the door while the flame is established.
4. As the kindling burns down, open the door and begin to add larger pieces to the
wood rack. Always use a heavy, insulated, fireproof glove when adding wood.
We recommend adding two to three pieces 1-1/2”to 2”thick when getting the fire
started. Any more than that will not burn quickly and will slow the heat up time of
the unit. Replace the door, like in step 3, each time you add wood to keep the heat
in the unit. Continue this process until the cavity thermometer reads at least 750°F.
5. We recommend using a laser thermometer to check the temperature of the
soapstone cooking surface. The cavity temperature can be much hotter than the
soapstone cooking surface. The stones perform best for cooking in the 650°-750°F
range. The stones will stay hot and in the cooking range for a long while after the
wood has burned down to coals. Visible flame is not necessary to get the perfect
slow cook on a thicker crust pizza or vegetables!
1
2
3
4

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Manual: 6400-41429
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MAINTENANCE
Your new outdoor cooking oven is a very low maintenance appliance. With a minimal amount of care, the unit will last for
many years of enjoyment.
BEFORE EACH USE:
1. Ensure all flue pipe and flue cap are in place and secured before starting a fire. Check the flue pipe before each
firing for any obstructions like bird’s nests or other foreign objects.
2. Remove any ash from previous fires. Dispose of ash properly in a noncombustible metal container with a tight-
fitting lid. Do not store the ashes on or around any combustible materials or flammable liquids.
3. Use a brass bristled brush to brush any fine ash to the left of the oven cavity before lighting a fire.
AFTER EACH USE:
1. Use a brass bristled brush to brush any debris left over from cooking into the coal bed to be burned off. The
baking stones are much easier to clean while hot.
2. Put the door on the unit and allow the unit to cool completely. This may take many hours as the soapstone baking
surface will hold heat for a long time.
3. Wipe down the ash lip, stainless steel dome, and the work surface around the unit. Do not use any harsh
chemical cleaners (like bleach, ammonia or peroxide based) on the stainless-steel parts as it can damage the
finish. We recommend a mild, grease cutting cleaner such as any stainless-steel cleaner, dish soap & water, or
ammonia free glass cleaner.
4. Occasionally, but especially in the fall before putting the oven away for the winter, wipe the stainless-steel parts
down with a mineral oil to preserve the finish on the stainless steel. Do not use vegetable or olive oils.
5. Once the unit is fully cold, we recommend covering the unit with a Hearthstone All-Season cover, available
through your local Hearthstone Authorized Dealer.
OPTIONAL ACCESSORIES
PART NUMBER
DESCRIPTION
902-0013
TOOL KIT (PIZZA PEEL,PIZZA TURNER,BRASS BRUSH)
902-0023
TOOL RACK
3702-101
INDIVIDUAL TOOL:BRASS BRISTLE STONE BRUSH
3702-102
INDIVIDUAL TOOL:PIZZA PEEL
3702-103
INDIVIDUAL TOOL:PIZZA TURNER
901-4010
OVEN BASE
902-0020
OVEN BASE/WORK TABLE
90-99031
LEATHER SAFETY GLOVES
7200-540
INFRARED THERMOMETER
902-0030
GRILL PAN KIT
902-0032
RIB RACK
902-0033
WOOD CHIP SMOKER BOX
CL-APRON-BLK
HEARTHSTONE BLACK APRON
904-3213
ALL SEASON WEATHER COVER

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Manual: 6400-41429
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