HearthStone 800-40WO15 User manual
Outdoor Cooking Oven 4.0
Manual: 6400-41429
R: 6/15/2022
Genio
Pizza Oven
(Patio 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.hearthstoneoutdoor.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
Genio Pizza Oven (Model 800-40WO15) 3
Table of Contents
Table of Contents.........................................................................................................................................3
Safety Information........................................................................................................................................4
Emergency Procedures ...............................................................................................................................4
Specifications...............................................................................................................................................5
Installation Requirements ............................................................................................................................6
Flue Requirements.......................................................................................................................................6
Clearances to combustibles.........................................................................................................................7
Unpacking the Oven ....................................................................................................................................7
Operation .....................................................................................................................................................8
Tips ............................................................................................................................................................10
Maintenance...............................................................................................................................................10
Optional Accessories .................................................................................................................................11
Limited Warranty........................................................................................................................................11
4 HearthStone Quality Home Heating Products, Inc. ®
Safety Information
Read and understand this Owner's Manual thoroughly before installing and using your oven.
Make sure to install your oven:
•Outdoors, in an open, well-ventilated area
•In accordance with all applicable codes
•According to the manufacturer's recommendations
oDO NOT MODIFY THIS OVEN IN ANY WAY
When using your oven, follow these safety precautions:
•Do not move the oven during use or while it is hot.
•Burn ONLY clean, split small (uder2” diameter) clean firewood
oNever burn painted or treated wood, drift wood, cardboard, artificial logs, garbage, coal, briquettes, or
charcoal in your oven.
oUse of any other fuel will void your warranty.
•DO NOT BURN OR STORE FLAMMABLE FLUIDS NEAR THE OVEN.
•Use paper or a small Firestarter to light your 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 oven. Keep all such
materials away from the oven.
•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 oven.
•Never connect the oven 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 oven when it is burning; they could be seriously injured by touching a hot oven.
•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.
Genio Pizza Oven (Model 800-40WO15) 5
Specifications
Firebox Capacity: 4.0 cubic feet of cooking space
Pizza Capacity: 2 - 12” Pizzas
Maximum Log Length:Up to 22” (56cm)
Oven Weight: 260lbs (117kg)
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]
6 HearthStone Quality Home Heating Products, Inc. ®
Installation Requirements
Choose a place to install your Pizza Oven, outdoors, in an open, well-ventilated area.
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. Any exposed surface, including the floor in front of the oven must also be protected to 18”
from the front of the door, and 2” either side of the oven to protect against falling coals or embers.
For any installation that will cause any part of the oven or the flue (chimney) or any component of the flue to be
within 36” of wood or any other combustible, follow NFPA Code 211 Protected Surfaces guidelines.
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 www.nfpa.org
Flue Requirements
Flue requirements for a free-standing or permanent installation.
Your pizza 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,
as in an open patio without a roof covering.
If you wish to install your oven permanently under a roof overhand, or in a semi-enclosed patio; you must first check all
local building codes for restrictions.
Extending the flue through a roof penetration is possible, if permitted by local laws. You will need to use an alternative flue
pipe manufacturer for a through-the-roof installation. Your dealer can help you with this or redirect you to a chimney
professional.
If extending the flue beyond the flue pipe supplied with the unit, UL (US) and/or CSA (Canada) certified venting system;
referring to the UL/CSA certified pipe manufacturer’s instructions. In the absence of a certified system, follow NFPA 211
installation standards to properly guide your installation. We recommend using Duravent 5” chimney system products,
though other UL/CSA listed chimney products are available through other manufacturers.
Extending the flue may add the necessity of adding a flue damper to maintain good oven temperatures.
DO NOT INSTALL YOUR PIZZA 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.
Genio Pizza Oven (Model 800-40WO15) 7
Clearances to combustibles
Dimensions in inches [millimeters]
WARNING: failure to maintain proper clearances to combustibles at all times may cause a fire to occur!
Unpacking the Oven
Remove the oven from the packaging. The oven is shipped with
components in the firebox which will need to be assembled before
the oven can be used.
•Unpack the chimney pipe and flue cap. Attach the flue cap
to the chimney pipe using the screw provided in the
hardware kit. Install the chimney pipe to the top of the unit
using the screws provided in the hardware kit.
•Unpack the door. Remove the protective film from the
door.
•Unpack the log rack.
•Unpack the door storage bracket, this is installed between
the feet and the body on either side of the unit if desired.
•Unpack the set of feet. Thread them into the thread holes
in the corners of the bottom face of the oven. Adjust as
needed to level the unit. Do not use the oven without the
feet installed.
•Unpack the four baking stones. Install the baking stones
inside of the oven.
•Remove the protective film the oven body and parts. Do
not burn the oven with the film on the body.
8 HearthStone Quality Home Heating Products, Inc. ®
Operation
Prepare ahead with a bundle of wood consisting of small pieces split with approximately a 1” cross section. These pieces
will give you the most conssitent temperatures. It is better to feed a single small piece of wood at a time to maintain the
desired temperature, rather than loading in large pieces. Large pieces take longer to heat up the oven and will not provide
consistent burn rates while cooking.
Start small with your first fire and when warming the oven up, the soapstone baking stones need a slow initial heat up to
cure the stones and drive the moisture from the stones. Once a desired cooking temperature is reached, add a small
piece of wood every pizza or two. You will quickly get used to what is required to keep the oven at a steady temperature
for the food you are cooking.
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 of unknown species. 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.
Genio Pizza Oven (Model 800-40WO15) 9
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!
10 HearthStone Quality Home Heating Products, Inc. ®
Tips
•For continuous, consistent cooking temperatures, add a length of wood every 5 - 7 minutes versus loading it up
when the heat has gone down. You will get the "feel " for it and enjoy amazing pizza, veggies, meats, fish or
whatever you choose to cook.
•For thin crust pizza, use higher 650°-750°(F) temperatures. For thick crusts, aim for 500°-550°(F) to assure it is
cooked through.
•For meats or vegetables, always use a tray or cook pan to contain oil or grease.
•We offer a weather cover (904-3213) and other useful accessories.
•If you exceed 850°(F) on the oven thermometer, you may cause structural damage or crack the cooking stones.
This will not be covered under warranty.
Maintenance
Your pizza 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 weather cover, available through
your local Hearthstone Authorized Dealer.
Genio Pizza Oven (Model 800-40WO15) 11
Optional Accessories
Part Number
Description
902-0013
Tool Set (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
Rolling Base
5140-1260
Side Shelf for the Rolling Base
90-99031
Leather Safety Gloves
7200-540
Infrared Thermometer
CL-APRON-BLK
Hearthstone Apron
904-3213
All season weather cover
Replacement Parts
1-0040-100
Baking stone (4 required)
7200-533
Cavity thermometer
5700-181
Chimney cap
5770-751
Chimney pipe
903-40902
Ash lip
903-00715
Door assembly
Limited Warranty
Your oven carries a three year warranty, from the date of purchase, against structural failure or defects in workmanship
for the original purchaser of the appliance.
This warranty includes failures to the oven liner, body components, and flue parts.
This warranty does not cover rusting, discolored stainless caused by heat, scratches, dents, dings which were not
reported to Hearthstone during initial unpacking of the appliance; hair line cracks in stones, damage caused by misuse,
damage caused by over heating, use of accelerants, use of disapproved fuel sources as detailed in this manual.
This warranty does not cover damage caused by incorrect assembly or installation by the customer; or damaged casued
by modification of the oven; nor damage caused by neglegance or poor maintenance.
This warranty does not cover this appliance for commercial use.
For any and all claims, please contact your dealer with your original receipt.
Table of contents
