US Stove Company 4840 User manual

OWNER’S OPERATION AND INSTRUCTION MANUAL
SAFETY NOTICE:
If this heater is not properly installed, a house fire may result.
For your safety, follow the installation instructions. Contact your
local building or fire officials about obtaining a permit, restrictions
and installation requirements in your area.
CAUTION!
Read All Instructions Carefully Before Starting
The Installation or Operating This Heater.
Improper Installation Could Void Your Warranty!
SAFETY TESTED TO ASTM 1509-04 & ULC S-627-00
UNITED STATES STOVE COMPANY
227 Industrial Park Road
P.O. Box 151
South Pittsburg, TN 37380
SAVE THIS MANUAL FOR FUTURE REFERENCE
THIS MANUAL WILL HELP YOU TO OBTAIN EFFICIENT, DEPENDABLE SERVICE FROM THE HEATER, AND
ENABLE YOU TO ORDER REPAIR PARTS CORRECTLY. KEEP IN A SAFE PLACE FOR FUTURE REFERENCE.
NOT RECOMMENDED AS PRIMARY HEAT SOURCE
852078G-1903E
WALL MOUNTED PELLET UNIT
MODEL 4840
PATENT PENDING
French version is available for download from the United States Stove Company website: http://www.usstove.com/
La version française est disponible pour téléchargement à partir du site United States Stove Company: http://www.usstove.com/
U.S. Environmental Protection Agency
Certified to comply with 2015 particulate emissions standards.

2
This manual describes the installation and operation of the U. S. Stove, 4840 wood heater. This heater meets the 2015 U.S.
Environmental protection agency’s crib wood emission limits for wood heaters sold after may 15, 2015. Under specific test conditions
this heater has been shown to deliver heat at rates ranging from 6,270 to 10,749 btu/hr.
IMPORTANT: Read this entire manual before installing and
operating this product. Failure to do so may result in property
damage, bodily injury, or even death. Proper installation of
this heater is crucial for safe and efficient operation. Never
use make-shift compromises during the installation.
Before installing your heater, you must perform an initial burn
in an OUTSIDE environment. Follow the Start-Up Procedure
in the Operation section of this manual.
This heater must be installed on an exterior wall to the outside.
Contact your local building officials to obtain a permit and
information on any additional installation restrictions or
inspection requirements in your area.
Save these instructions.. This manual has important operating
and maintenance instructions that you will need at a later time.
Always follow the instructions in this manual.
This heater is designed and approved for premium hardwood
pellet fuel only. Any other type of fuel burned in this heater
will void the warranty and safety listing.
Never use gasoline, gasoline-type lantern fuel, kerosene,
charcoal lighter fluid, or similar flammable liquids to start or
“freshen up” a fire in this heater. Keep all such liquids well
away from the heater while it is in use.
A working smoke detector must be installed in the same room
as this product.
Do not unplug the heater if you suspect a malfunction. Turn
the ON/OFF SWITCH to ”OFF’ and contact your dealer.
Do not operate your heater with the viewing or combustion
door open. The auger will not feed pellets under these
circumstances and a safety concern may arise from sparks or
fumes entering the room.
Never disable or bypass the safety devices in this unit. Doing
so could result in damage to the unit or endanger yourself or
someone else.
For noncatalytic models, the following statement— ‘‘This
wood heater needs periodic inspection and repair for proper
operation. It is against federal regulations to operate this wood
heater in a manner inconsistent with operating instructions in
this manual.
Never try to repair or replace any part of the heater unless
instructions for doing so are given in this manual. All other
work should be done by a trained technician.
Turn the heater OFF and allow to completely cool before
performing any maintenance.
Disconnect the power cord before performing any maintenance!
NOTE: Turning the ON/OFF Switch to ”OFF” does not
disconnect all power to the electrical components of the heater.
Ashes must be disposed in a metal container with a tight fitting
lid. The closed container of ashes should be placed on a non-
combustible surface or on the ground, well away from all
combustible materials, pending final disposal.
The exhaust system should be checked bi- monthly during the
burning season for any build-up of flyash, soot or creosote.
HOT WHILE IN OPERATION. KEEP CHILDREN
CLOTHING AND FURNITURE AWAY. CONTACT MAY
CAUSE SKIN BURNS. Do not touch the hot surfaces of
the heater. Educate all children on the dangers of a high-
temperature heater. Young children should be supervised when
they are in the same room as the heater.
A power surge protector is required. This unit must be plugged
into a 110 - 120V, 60 Hz grounded electrical outlet. Do not use
an adapter plug or sever the grounding plug. Do not route the
electrical cord over the heater. Do not route the cord in foot
traffic areas or pinch the cord under furniture.
The heater will not operate during a power outage. If a power
outage does occur, check the heater for smoke spillage and
open a window if any smoke spills into the room.
Never block free airflow through the open vents of the unit.
Keep foreign objects out of the hopper.
The moving parts of this heater are propelled by high torque
electric motors. Keep all body parts away from the auger
while the heater is plugged into an electrical outlet. These
moving parts may begin to move at any time while the heater
is plugged in.
Do not place clothing or other flammable items on or near
this heater.
WARNING—DO NOT INSTALL THIS UNIT IN A
SLEEPING ROOM. CAUTION—The structural integrity
of the mobile home floor, wall, and ceiling/roof must be
maintained.
This appliance is not intended for commercial use.
DO NOT INSTALL A FLUE DAMPER IN THE EXHAUST
VENTING SYSTEM OF THIS UNIT.
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE
SERVING ANOTHER APPLIANCE.
DO NOT USE CHEMICALS OR FLUIDS TO START THE
FIRE; DO NOT BURN GARBAGE OR FLAMMABLE
FLUIDS SUCH AS GASOLINE, NAPHTHA OR ENGINE
OIL.
DO NOT CONNECT TO OR USE IN CONJUNCTION
WITH ANY AIR DISTRIBUTION DUCTWORK
UNLESS SPECIFICALLY APPROVED FOR SUCH
INSTALLATIONS.
The chimney connector shall not pass through an attic or roof
space, closet or similar concealed space, or a floor, or ceiling.
Where passage through a wall, or partition of combustible
construction is desired, the installation shall conform to
CAN/CSA-B365, Installation Code for Solid-Fuel-Burning
Appliances and Equipment.
SAFETY PRECAUTIONS

3
HEATING SPECIFICATIONS
DIMENSIONS
1BTU output will vary depending on the quality of fuel. Use PFI listed
fuels for the best results.
2Heating capacity will vary depending on floor plan layout of your
home, degree of insulation, and the outside temperature.
3Pellet size may effect the actual rate of fuel feed and burn times. Fuel
feed rates may vary by as much as 20%. Use PFI listed fuel for best results.
SPECIFICATIONS
Heat Output116,400 BTU/hr.
Heating Capacity2500 - 1,000 sq. ft.
Fuel Burn Rate33/4 - 2 1/2 lbs./hr.
Burn Time (lowest setting) 35 hours
Hopper Capacity 28lbs
INTAKE/EXHAUST APPROXIMATE LOCATION DIMENSIONS
FRONT VIEW
TOP VIEW
SIDE VIEW
22.50 [571.5]
4.50 [114.2]
36.00 [914.4]
22.25 [565.2]
12.43 [315.7]
1.84 [46.7]
APPROX.
16.92
APPROX.
35.87 [911]
Height 27” [685.7 mm]
Width 36” [914.4 mm]
Depth of Unit 12.43” [315.77 mm]
Depth with Mounting Wall Bracket Approx. 14.27”
[362.4 mm]
Product Weight 185 lbs
Back Side Left Edge to Center 29.34” [745.1 mm]
Back Side Top Edge to Center 10.97” [278.7 mm]
Diameter of Intake\Exhaust 5.25” [133.35 mm]
Diameter of Cut Out in Exterior Wall Refer for to Template

4
FUEL CONSIDERATIONS
Your Pellet heater is designed to burn certified Premium
Hardwood pellets that comply with Association of Pellet Fuel
Industries standards. Pellets that are soft, contain excessive
amounts of loose sawdust, have been, or are wet, will result in
reduced performance. Failure to use proper fuel can affect the
longevity of the appliance. Smaller pellets could affect feed
rates. Store your pellets in a dry area and well away from the
heater.
Pellet Fuel Institute (PFI) Premium Standards
Min. Density 40 lbs. per cubic ft.
Size ¼” to 5/16” diameter, length
no greater than 1½”
Heat Output 8,200 BTU/lb
Moisture
Content
8% by weight or less
Ash Content 1% by weight
Salt Content 300 parts per million or less
Do not use grates or other methods of supporting the fuel. Burn fuel in burnpot without modification.
SAFETY AND COMPLIANCE
Your Pellet heater has been safety tested and listed to ASTM E 1509-04, UM-84 and ULC S627-00, by Intertek Testing Services
in Portland, Oregon, USA.
Electrical Rating 110-120 volt, 60Hz, 3.0Amp
Watts (operational) 175 approximately
Watts (igniter running) 425 approximately
ELECTRICAL SPECIFICATIONS
WARNING! - DO NOT INSTALL IN A SLEEPING ROOM
CAUTION! - THE STRUCTURAL INTEGRITY OF THE MOBILE HOME FLOOR, WALL, AND CEILING/ROOF MUST
BE MAINTAINED.
• The heater must be permanently attached to the wall.
• The heater must be electrically grounded to the steel chassis of the mobile home with 8 GA copper wire using a serrated
or star washer to penetrate paint or protective coating to ensure grounding.
• When moving your mobile home, the heater must be removed while the mobile home is being relocated. After relocation,
heater may be reinstalled and securely fastened.
• Check with your local building officials as other codes may apply.
Insure that the flame impingement baffle is installed properly.
If the baffle is not installed properly, push the plate up in the
void at an angle, rotate it to horizontal and place it on the
metal stops.
MOBILE HOME INSTALLATION REQUIREMENTS
ASSEMBLY INSTRUCTIONS
I
v
m
Flame Impingement Baffle

5
FLOOR PROTECTION
This heater must have a non-combustible floor protector (ember
protection) installed beneath it if the floor is of combustible material.
If a floor pad is used, it should be UL listed or equal. The floor pad or
non-combustible surface should be large enough to extend a minimum of
6-inches [152mm] in front and 2-inches [51mm] on each side of the heater.
Canadian Installations require a minimum of 450 mm [18”] beyond the
front of the unit and 200mm [8”] beyond each side of the unit
A Floor Protector of 1/4 inch thick is recommended for this installation
CLEARANCES TO COMBUSTIBLES
Combustible Clearance
Floor (Allow for brace) 8 inches [203mm]
Vent must meat
minimum ground
clearances
Left / Right 6 inches [152mm]
Ceiling (Allow for
fuel loading)
18 inches [457mm]
Mantle / Sill 11 inches [279mm]
Front 60 inches [1.5M]
STANDARD INSTALLATION
6
[152]
39.
2 [51]
87 [91012]
2 [51]
Floor Protector
6” [152mm]
18”
[457mm]
60”
[1.5M]
Floor Protector
Back Wall
Ceiling
Read this entire manual before you install and use your pellet heater. Failure to follow instructions may result in property damage,
bodily injury, or even death!
Before installing your heater, you must perform an initial burn in an OUTSIDE environment. Follow the Start-Up Procedure in
the Operation section of this manual.
Your pellet heater may be installed to code in either a conventional or mobile home (see SPECIAL MOBILE HOME REQUIREMENTS).
It is recommended that only a authorized technician install your heater, preferably a National Fireplace Institute (NFI) certified
specialist. This heater must be installed on an exterior wall to allow exhaust venting to meet the minimum required clearances. Once
the desired location is selected, and before cutting a hole, check the outside of the structure for anything obstructing clearances to
the exhaust vent. Also clear away leaves, shrubs/bushes, or trees that may be around the exhaust outlet.
Required Tools for installation:
GENERAL INSTALLATION NOTES
• Do not install heater where the exhaust will terminate in a window well or any opening below ground level.
• Special precautions may be required to prevent snow build-up within 12 inches of the air intake.
• Clearances around heater must provide adequate room for service, cleaning, and air circulation.
• Residential Garage Installation: The heater shall be located or protected so it is not subject to damage by a moving
vehicle. Use care when selecting a good location within the garage. DO NOT locate the heater where the discharge air
will be directed onto a nearby parked vehicle. DO NOT store containers of paint, gasoline, or other flammable liquids in
the same area as the heater, inside or outside the home or structure.
1. Venting Kit
2. Power Drill
3. 7/32” drill bit to drill pilot holes
4. Wrench / Socket.
5. Hammer
6. Knife
7. Pen
8. Noncombustible floor protector
9. Level
10. Stud Finder
11. Jig Saw / Hole Saw

6
• Select a wall to the exterior of the building. This wall should have the required clearance to combustibles inside and out
as mentioned in this manual. Make certain that electrical wires, conduit, water or gas pipes do not pass through the area
you have selected.
STEP: 1 MOUNT THE WALL PLATE
Note:Any material covering the wall (such as sheetrock) must not exceed 5/8” 16 mm).
Option 1: Mounting on a wood-stud wall
1. Locate the studs in exterior wall. Verify the center of the stud with an
edge-to-edge stud finder. Mark center point at predetermined height
which meets all clearance requirements of the appliance.
Note: Make sure that the opening for the exhaust thimble is
not to close to a stud in the wall before the hole is cut.
2. At the wall height that was determined in the previous step, place
a mid-sized nail through the center triangular shaped hole of the
mounting plate to hold it while the locations of the mounting holes
and the exhaust/intake through hole are marked. Make sure that the
wall mounting plate is flush against the wall, then level the mounting
plate and verify that pilot holes are centered properly on the studs. Use
a pencil to mark the pilot hole locations, and intake/ exhaust through
hole, then remove the mounting plate from the wall.
3. Drill the four pilot holes to a depth of 2” (75 mm) using a 5/32” (3.96 mm) diameter drill bit.
4. Find the center of the through hole for the wall thimble and drill a pilot hole all the way through the wall to the exterior with
an installer bit. Use this hole as a center point to cut your hole through the exterior wall.
5. Carefully cut exhaust/intake through hole in exterior wall completely through to the outside. (SEE VENT CLEARANCES
SECTION TO INSURE PROPER INSTALLATION)
6. Install the wall thimble included with the vent kit to the manufactures instructions.
7. Realign the wall mount with the pilot holes and exhaust/intake through hole. Insert the four 1/4” x 2” lag bolts with washers,
and tighten the lag bolts until the wall mounting bracket is pulled firmly against the exterior wall.
WARNING: AVOID POTENTIAL INJURIES OR PROPERTY DAMAGE! DO NOT OVER-TIGHTEN THE LAG BOLTS.
THIS COULD POTENTIALLY STRIP THE MOUNTING HOLES AND CAUSE THE BOLTS NOT TO HOLD CORRECTLY.
Option 2: Mounting on a solid concrete or concrete block wall
1. Level the wall plate and mark the hole locations.
2. At the wall height you determined in the previous step, place a small nail thru center triangle hole of bracket and align the
wall mount against the wall. Level bracket and verify that pilot holes are not located in the mortar of the cinder blocks. Use
a pencil to mark the pilot hole locations, and intake/exhaust thru hole then remove the wall plate.
3. Drill pilot holes to a depth of 2” (75 mm) using a 5/32” (3.96 mm) diameter masonry drill bit.
4. Carefully cut intake/exhaust thru hole in exterior wall thru to the outside. (SEE VENT CLEARANCES SECTION TO INSURE
PROPER INSTALLATION)
5. Insert 1/4” concrete wall anchors into the pilot holes and make sure that the anchors are seated flush with the concrete surface.
6. Align the wall plate with the anchors. Place washers over the screw holes in the wall plate, insert 1/4” x 2” lag bolts through
the washers, and then tighten the lag bolts until the washers are pulled firmly against the wall plate and the wall mount is
pulled firmly against the exterior wall.
STEP: 2 MOUNTING THE HEATING UNIT TO THE WALL PLATE
Note: The Heating Unit is heavy. You will need assistance with this step.
1. Before hanging the unit on the wall bracket the exhaust/intake transition piece needs to be mounted on the back of the unit.
On the exhaust side of the unit there is a ring that is held on with four screws, it needs to be removed so the transition piece
can be mounted. Use the supplied Phillips head self-tapping screws to attach the transition piece. Once the transition piece is
mounted the ring on the outside of the unit can be put back on.
2. After you have your hole cut and mounting bracket secured to the wall, the heating unit can hung on the bracket.
3. Align /intake with the hole in the wall mounting bracket and thimble, and carefully insert heating unit. Tilt the top of the
heating unit towards the wall and lower onto the wall mounting bracket making sure that the right and left bracket mounted
to the unit hooks over the top of the wall mounting bracket. Allow the Heating Unit to pivot downward becoming parallel to
the wall mounting bracket. Lift the unit up and the lower hooks will engage with the mounting bracket.
4. Once the unit is securely hanging on the wall mounting bracket there are two 7/16” head bolt on the bottom of the bracket
that need to be tightened down to lock the unit to the bracket.
5. Once the unit is locked down the exhaust/ intake pipe can be attached to the unit on the outside of the house.
5/8”
[16mm]
16”
[406mm]
3”
[75mm]
WALL INSTALLATION

7
IMPROPER INSTALLATION: The manufacturer will not be held responsible for damage caused by the
malfunction of a heater due to improper venting or installation. Call [phone] and/or consult a professional
installer if you have any questions.
VENT TERMINATION CLEARANCES:
A. Minimum 4-foot [1.2m] clearance below or
beside any door or window that opens.
B. Minimum 1-foot [0.3m]clearance above
any door or window that opens.
C. Minimum 2-foot [0.6m] clearance
from any adjacent building.
D. Minimum 7-foot [2.1m] clearance from any
grade when adjacent to public walkways.
E. Minimum 2-foot [0.6m] clearance above any
grass, plants, or other combustible materials.
F. Minimum 4-foot [1.2m] clearance from
an forced air intake of any appliance.
G. Minimum 2-foot [0.6m] clearance
below eves or overhang.
H. Minimum 1-foot [0.3m] clearance
horizontally from combustible wall.
NOTICE: This unit shall be installed in such a way that the exhaust gases are directed so they do not jeopardize people,
overheat combustible structures, or enter buildings.
The chimney connector shall not pass through an attic or roof space, closet or similar concealed space, or a floor, or ceiling.
Where passage through a wall, or partition of combustible construction is desired, the installation shall conform to CAN/
CSA-B365, Installation Code for Solid-Fuel-Burning Appliances and Equipment.
VENTING -INSTALLATION
6”
(152 mm)
24”
(609mm)

8
VENT INSTALLATION/ASSEMBLY PROCEDURE
Step 1) DirectVent Pro pipe and fittings are designed with special twistlock connections. To connect the venting system to the
appliance flue outlet, a twist-lock Appliance Adaptor is required. The adaptor will be supplied for installation in the field.
Assemble the desired combination of Pipe Sections and Elbows to the Appliance Adaptor.
Notes:
1. Twist-lock procedure: Line up locking lugs on male and female ends of pipe sections. Insert the male end of pipe into the female
end until the locking lugs are covered. Twist the female end clockwise an eighth of a turn to lock sections together. Three screws
are required to secure the joint, ensure they do not penetrate the inner wall of the vent pipe.
2. Horizontal runs of vent pipe must be supported to prevent any downward sags. Horizontal pipe sections should be supported at
least every 4-feet. Wall Straps can be used for this purpose.
3. Seal all joints with high temperature silicone.
Step 2) With the appliance adaptor and pipe section attached to the appliance, slide the appliance into its correct location, and mark
the wall for a hole of the appropriate size. The center line of the pipe should line up with the center of the hole. Cut and
frame the hole in the exterior wall where the vent will be terminated. A Wall Thimble is required.
Notes:
1. The horizontal run of venting must be level, or have a 1/4-inch rise for every 1-foot of run towards the termination. Never
allow the vent to run downward. A downward slope can trap heat and become a possible fire hazard.
2. The location of the Horizontal Vent Termination on an exterior wall must meet all local and national building codes, and must
not be easily blocked or obstructed. Termination clearances as shown in the VENT TERMINATION CLEARANCES section.
MALE
END
FEMALE
END
SCREWS
You must use the Duravent FasNSeal Concentric Vent System designed to work with this appliance from United States Stove
Company. DO NOT substitute other venting systems.
The 3” x 5” horizontal square termination kit (35CVS-KUS) includes:
1. 3” x 5” stove adapter
2. Adjustable Horizontal Square Cap 35CVS-HZSQ
3. Wall Thimble 35CVS-WT
A source of fresh air shall be provided when required. To ensure this make sure that the intake to the concentric vent system is
clear of all obstructions during use.
 


Exterior Wall Thimble
Duravent Fasnseal Concentric Vent System
Twistlock Procedure
Concentric Vent Attachment
Adjustable Horizontal Square Cap

9
HOW YOUR HEATER WORKS
Your pellet heater operates on a timer based auger fuel feed system, that is controlled by a digital circuit board. The fuel is delivered
from the auger into a burn pot, which is the vessel where the combustion process takes place. Based upon the heat ranges (1-5), the
heater will feed the appropriate amount of fuel to reach a set temperature range. Note that the amount of heat produced by the heater
is proportional to the rate of the fuel that is burned. Your heater is equipped with an automatic ignition system that should ignite the
fuel within 5-10 minutes from pressing the ON button. As pellets fall into the burn pot and ignite, outside air is drawn in to feed
the fire by a combustion blower. The post combustion gases are then pulled through the heat exchanger as they are traveling out
the exhaust. As the heater warms up, room air is circulated around the heat exchanger by means of a room air blower, distributing
warm air into the room.
Because a forced draft pressure is required for the combustion process inside your heater, it is extremely important that the exhaust
system be properly maintained. And, that when operating your heater, you make sure that the viewing and combustion doors are
properly closed and/or sealed.
Turning the heater ON/OFF, as well as adjustments for the fuel feed rate is performed by pressing the appropriate button(s) on the
control panel which is located on the front, lower left-hand corner of your heater.
ON/OFF
• Pressing the “ON” button on the control panel will begin the start-up sequence for the heater. Fuel will begin to feed through
the auger feed system then ignite after approx. 5 minutes.
• Pressing the “OFF” button on the control panel will cause the heater to enter its shut-down sequence. The fuel feed system
will stop pulling fuel from the hopper and, once the fire goes out and the heater cools down, the fans will stop running.
HEAT RANGE
• Pressing the “Heat Range” arrows, up or down, will adjust the amount of fuel being delivered to the burn pot.
• The exhaust blower will start. Note that this appliance pulses the exhaust blower in order to achieve the proper air to fuel
ratio, and to also aid in the cleaning of the burn pot.
• Once the heater reaches a set temperature, the room fan will come on.
LIGHT (LED) INDICATORS
• Heat Range LED - displays the selected heat
setting. Number “1” LED lights to display
that there is power to unit even if the heater
is off.
• Door Sw LED - lights when front viewing
door is opened or if the hopper lid is raised.
• Press Sw LED - lights if pressure is lost inside
the combustion chamber. (See “Errors”)
• E LED - Operational Error (See “Errors”)
• ON LED - Flashes in start-up mode. On solid
during Run mode
• OFF LED - Flashes during shut down mode
CONTROL PANEL OVERVIEW
UNDERSTANDING YOUR HEATER

10
This heater is designed to burn only PFI Premium grade pellets. This appliance can also burn pellets rated as standard after May
16, 2015
DO NOT BURN:
Burning these materials may result in release of toxic fumes or render the heater ineffective and cause smoke.
UNIT PREPARATION
After properly installing your heater, you will need to attach the electrical cord to the right side blower housing first; then plug it
into a 110-volt outlet (an outlet surge protector is highly recommended).
PERFORMING AN INITIAL BURN
You must perform an initial burn in this appliance before installing it in your home or garage. This process is to ensure that the
appliances is functioning correctly, to cure the high temperature paint and burn off any oil that is present in the sheetmetal components
of the combustion chamber. For the initial burn, only add a small amount of fuel, approximately 4-5 lbs. or about the amount to fill
a 2 lb. coffee can. Operate the appliance on the 3 or 4 heat setting for approximately 30 minutes to an hour. There will probably be
a small amount of smoke or fumes irradiating from the appliance during this process. Follow the Start-Up procedure below to begin
your burn.
START-UP PROCEDURE
Never use gasoline, gasoline-type lantern fuel, kerosene, charcoal lighter uid, or similar liquids to start or “freshen up” a re in
this heater. Keep all such liquids well away from the heater while it is in use.
1. Verify that the hopper is clean and free of foreign matter.
2. Fill the hopper with wood pellets; do not allow any part of the bag or any other foreign material into the hopper, as this may
jam the auger.
3. Ensure that all pellet matter is cleared from the hopper seating surface.
4. Close the hopper lid. The unit WILL NOT feed fuel with the hopper lid open.
5. Verify that there is no pellet fuel, ash, or foreign matter in the burn-pot before starting the appliance.
6. Make sure that the viewing door and combustion door is securely closed (the safety switch will not allow the heater to feed
fuel if they are left open.
7. Press the “ON” button on the control pad and set the “heat RANGE” to your desired setting. The ON light will be flashing
and the light corresponding with the heat setting will be light.
What will happen next....
The heater will begin to feed fuel and the exhaust (draft) blower is running. Note that the exhaust blower is pulsing. The auto-start
ignitor will ignite the fuel in approximately 5-10 minutes. In the start-up mode, the “ON” LED will flash until it reaches a factory
preset temperature. At that point, the “ON” LED will come on solid and the heater will begin to ramp up to your selected heat range.
The Room Air Blower will not function until the heater reaches a factory preset temperature.
Attempts to achieve heat output rates that exceed heater design specifications can result in permanent damage to the heater.
SHUT DOWN PROCEDURE
Press the “OFF” button on the control pad to put the stove in shut down mode.
At this time, the red light above the OFF will blink and the “ON” light will go off.
The auger will stop feeding pellets, but the distribution blower and exhaust blower
will continue to operate. When the internal temperature of the unit drops below
the factory preset temperature, the distribution blower and exhaust blower will
cease to operate. The red light will then shut off and the unit will be completely
shut down.The hotter the unit is during its operation, the longer it will take for the
stove to complete the shut down cycle. If the stove stays on for more than 1 hour after pressing the “OFF” button and you are sure
that the fire is out, the stove can be unplugged from the outlet. After approximately 10 seconds, the unit can be re-connected to the
power source and the control board will be reset.
WARNING: Never shut down this
unit by unplugging it from the power
source.
OPERATION
1. Garbage;
2. Lawn clippings or yard waste;
3. Materials containing rubber, including tires;
4. Materials containing plastic;
5. Waste petroleum products, paints or paint thinners, or
asphalt products;
6. Materials containing asbestos;
7. Construction or demolition debris;
8. Railroad ties or pressure-treated wood;
9. Manure or animal remains;
10. Salt water driftwood or other previously salt water saturated
materials;
11. Unseasoned wood; or
12. Paper products, cardboard, plywood, or particleboard.
The prohibition against burning these materials does not
prohibit the use of fire starters made from paper, cardboard,
saw dust, wax and similar substances for the purpose of
starting a fire in an affected wood heater.

11
DAILY OPERATION
• Never place your hand near the auger while the heater is in operation.
• This unit should be filled when the hopper level drops below 3-inches.
• In the event of a power outage, the heater will not function. If the unit was “ON” when the power outage occurred, one
of the following will take place:
1. If the heater is still warm, it will resume feeding fuel and continue to operate normally. If the fire has gone out, you will have
to press the “OFF” button and then the “ON” button again to begin a new start-up sequence.
2. If the heater has cooled-off, it will reset to its “OFF” condition. At this point, you may press the “ON” button and the unit
will begin a new start-up sequence. Make it a habit to empty the burn pot in these situations.
NOTE: The unit will also shut down in the event of an exhaust blower failure; if this is the case, the unit will not re-start and you
must contact Customer Service at [phone].
The amount of visible smoke being produced can be an effective method of determining how efficiently the combustion process
is taking place at the given settings. Visible smoke consist of unburned fuel and moisture leaving your stove. Learn to adjust the air
settings of your specific unit to produce the smallest amount of visible smoke. Wood that has not been seasoned properly and has a
high wood moisture content will produce excess visible smoke and burn poorly.
SAFETY AND CONVENIENCE FEATURES
Your heater incorporates safety switches that helps ensure that everything is in proper working order before feeding fuel to the
burn pot. The heater will not operate if the viewing or combustion door is left open; or if the exhaust blower fails or the exhaust
system is blocked.
The RTD, Resistance Temperature Device, will prevent your heater from operating at abnormally high temperatures. The heater
has two over temperature limits. If the unit reaches the first limit, it will reduce fuel consumption in order to reduce temperatures.
If the unit reaches the second limit, it will shut down and will need to be restarted.
Your heater also includes an auto-start igniter as a standard feature. The use of other fire starter materials (wood chips, starter
gel, etc.) is not necessary. By simply pressing the “ON” button on the digital control panel, your heater will begin to feed fuel and
automatically start within 5 minutes.
This wood heater has a manufacturer-set minimum burn rate that must not be altered. It is against federal regulations to alter this
setting or otherwise operate this wood heater in a manner inconsistent with operating instructions in this manual.
Failure to clean and maintain this unit as indicated can result in poor performance, safety hazards and void your warranty.
Unplug your heater’s electrical cord prior to removing the back panel or opening the exhaust system for any inspection, cleaning,
or maintenance work.
Never perform any inspections, cleaning, or maintenance on a hot heater.
Do not operate heater with broken glass , leakage of flue gas may result.
EXHAUST SYSTEM
The by products of combustion contain small particles of fly ash. Fly ash will collect in the exhaust venting system and restrict
the flow of flue gases. Incomplete combustion, such as during startup, shutdown, or incorrect operation of the heater will lead to
soot or creosote formation which will collect in the exhaust system and if ignited, an extremely hot fire could result. Therefore,
it is important that the exhaust system be inspected and cleaned at least bi-monthly during the burning season. Contact your local
municipal or provincial fire authority for information on how to handle a fire. Have a clearly understood plan to handle a fire if one
should ever occur. Cleaning or monitoring the areas behind the front cleanout door should be done frequently to ensure minimum
fly ash or soot/creosote build-up.
INTERIOR CHAMBERS
Periodically remove and clean the burn pot, flame impingement plate and the areas behind the cleanout door. In particular, it is
advisable to clean out the holes in the burn pot to remove any build up that may prevent air from moving through the burn pot freely.
As good practice, you should remove and clean the burn pot each time you restart the heater, weekly or as needed as this ensures
that the best efficiency is achieved.
If a vacuum is used to clean your heater, we suggest using a vacuum designed for ash removal. Some regular vacuum cleaner (i.e.
shop vacs) may leak ash into the room.
OPERATION
MAINTENANCE

12
ASH DISPOSAL
Ashes should be placed in a metal container with a tight fitting lid. The closed container of ashes should be placed on a noncombustible
floor or on the ground, well away from all combustible materials, pending final disposal. If the ashes are disposed of by burial in soil
or otherwise locally dispersed, they should be retained in the closed container until all cinders have been thoroughly cooled. Do not
place other waste in the same container.
SMOKE AND CO MONITORS
Burning wood naturally produces smoke and carbon monoxide(CO) emissions. CO is a poisonous gas when exposed to elevated
concentrations for extended periods of time. While the modern combustion systems in heaters drastically reduce the amount of CO
emitted out the chimney, exposure to the gases in closed or confined areas can be dangerous. Make sure your stove gaskets and
chimney joints are in good working order and sealing properly to ensure unintended exposure. It is recommended that you use both
smoke and CO monitors in areas having the potential to generate CO.
CHECK AND CLEAN THE HOPPER
Check the hopper periodically to determine if there is any sawdust or pellets that are sticking to the hopper surface. Clean as needed.
DOOR AND GLASS GASKETS
Inspect the door’s and ash pan’s gaskets periodically. These may need to be removed to have frayed, broken, or compacted gaskets
replaced. Keep door, glass, and ash pan seals in good condition. This unit’s door uses a 3/8” diameter rope gasket.
BLOWER MOTORS
Clean the air holes on the motors of both the exhaust and distribution blowers annually. Remove the exhaust blower from the
exhaust duct and clean out the internal fan blades as part of your fall start-up.
PAINTED SURFACES
Painted surfaces may be wiped down with a damp cloth. If scratches appear, or you wish to renew your paint, contact your
Authorized pellet heater Dealer to obtain a can of suitable high-temperature paint.
GLASS
Cleaning - We recommend using a high quality glass cleaner. Should a build up of creosote or carbon accumulate, you may wish
to use 000 steel wool and water to clean the glass. DO NOT use abrasive cleaners. DO NOT perform the cleaning while the glass
is HOT. ,
In the event you need to replace the glass, follow these instructions. Wear leather gloves or any other gloves suitable for handling
broken glass. Dispose of all broken glass properly. Use ONLY high temperature ceramic glass of the correct size and thickness. DO
NOT substitute alternative materials for the glass. Contact your authorized dealer to obtain this glass. The firebox glass is replaced
as follows: remove the retainers and any broken glass or gasketing from the sealing face of the door. Install a new glass gasket.
Re-install the retainers to hold the glass. Be careful not to overtighten the screws for this could damage the glass. To replace the
viewing door glass remove the back of the door and the insulation, then proceed as described for the firebox door glass replacement.
DO NOT abuse the door glass by striking, slamming or similar trauma. Do not operate the stove with the glass removed, cracked
or broken.
FALL START UP
Prior to starting the first fire of the heating season, check the outside area around the exhaust and air intake systems for obstructions
including leaves, bushes/shrubs, and/or trees. Clean and remove any fly ash from the exhaust venting system. Clean any screens
on the exhaust system and on the outside air intake pipe. Turn all of the controls on and make sure that they are working properly.
This is also a good time to give the entire heater a good cleaning throughout.
SPRING SHUTDOWN
After the last burn in the spring, remove any remaining pellets from the hopper and the auger feed system. Scoop out the pellets
and then run the auger until the hopper is empty and pellets stop flowing. Vacuum out the hopper. Thoroughly clean the burn pot,
and firebox. The exhaust system should be thoroughly cleaned. If removing the unit for storage, store the heater in a dry location.
YEARLY SERVICING
A yearly servicing and cleaning by your Authorized pellet heater dealer is recommended. A fee may be charged for this service.
MAINTENANCE

13
Disconnect the power cord before performing any maintenance! NOTE: Switching the appliance to ”OFF” does not disconnect
all power to the electrical components of the heater.
Never try to repair or replace any part of the heater unless instructions for doing so are given in this manual or supplied from the
factory. All other work should be done by a trained technician.
TROUBLE SHOOTING ERRORS
PROBLEM CAUSE: To rich air/fuel mixture
Orange, lazy flame, excessive
fuel build-up in the burn pot
• Clean out the burn pot and behind the cleanout door.
• Make sure that the combustion door is closed and sealed properly.
If not, adjust door catch and/or replace door gaskets.
• Check that the exhaust is clear of any obstructions. Clean as needed
• Check for proper seating of the burn pot.
PROBLEM CAUSE: Burn pot burns out of fuel
Fire goes out or heater shuts down. • Hopper is empty, refill the hopper.
• Loss of draft pressure. Make sure that the combustion door is closed and
sealed properly. If not, adjust door catch and/or replace door gaskets.
Check that the exhaust is clear of any obstructions. Clean as needed.
• Make sure the viewing door and hopper lid is closed completely.
• Auger system is jammed or there is a “bridging” of the fuel in the
hopper, preventing fuel from flowing into the auger feed system.
PROBLEM CAUSE: Auto-Start Igniter fails to ignite the fuel in the burn pot.
Heater does not start a fire when
the “ON” button is pushed
• Turn the heater “OFF”. Clear the unburnt fuel from the burn pot and try again.
• Check the pellet quality. Replace if moist, wet, or dirty.
• Loss of draft pressure. Make sure that the combustion door is closed and
sealed properly. If not, adjust door catch and/or replace door gaskets.
Check that the exhaust is clear of any obstructions. Clean as needed.
• Check that the auto-start igniter is not blocked with ash or soot. (The igniter
is located behind the burn pot on the back wall of the combustion chamber.)
• The auto-start igniter gets “red hot” during start-up. If you can not visibly
see the igniter glowing during start-up, then the igniter may need to be
replaced or there is a problem with the electrical control system.
• Check for proper alignment between the burn pot and the igniter tube.
PROBLEM CAUSE: Heater has reached the 2nd over temperature limit.
Heater enters shut-down mode • To much fuel in the burn pot. Restart heater after heater has cooled.
• RTD sensor in the room discharge air may be faulty causing
the room fan not to come on. Contact your dealer.

14
Disconnect the power cord before performing any maintenance! NOTE: Switching the appliance to ”OFF” does not disconnect
all power to the electrical components of the heater.
Never try to repair or replace any part of the heater unless instructions for doing so are given in this manual or supplied from the
factory. All other work should be done by a trained technician.
TROUBLE SHOOTING ERRORS
PROBLEM CAUSE:
The air inlet, burnpot, interior
combustion air chambers, combustion
blower, or exhaust pipe are blocked
with ash or foreign material.
Follow all cleaning procedures in the maintenance section of the owner’s manual.
Pressure switch hose or stove
attachment pipes for hose
are blocked.
Unhook air hose from the pressure switch and blow through it. If air
flows freely, the hose and tube are fine. If air will not flow through
the hose, use a wire coat hanger to clear the blockage.
The firebox is not properly sealed. Make sure the door is closed and that the gasket is in good shape.
Vent pipe is incorrectly installed Check to make sure vent pipe installation meets criteria in owner’s manual.
The pressure switch wire
connections are bad.
Check the connectors that attach the wires to the pressure switch.
Combustion blower failure. With the stove on, check to see if the combustion blower is running. If it
is not, you will need to check for power going to the combustion blower.
It should be a full current. If there is power, the blower is bad.
Control board not sending power
to combustion blower.
If there is no current going to the combustion blower, check all wire connections
and fuse. If all wires are properly connected, you have a bad control board.
Control board not sending
power to pressure switch.
There should be a 5-volt current (approximately) going to the
air switch after the stove has been on for 30 seconds.
Pressure switch has failed. To test the pressure switch, you will need to disconnect the air hose from the body
of the stove. With the other end still attached to the pressure switch, very gently
suck on the loose end of the hose (you may want to remove the hose entirely
off the stove and the pressure switch first and make sure it is
clear). If you hear a click, the air switch is working.
BE CAREFUL TOO MUCH VACUUM CAN DAMAGE THE AIR SWITCH!

15
41
51 12
8
1
60
39
40
32
10 11
9
27
26
28
19
18
21
20
23
17
22
62
63
61
64
30
38
34
33
66
31
6
4
2
3
5
7
14
13
24
59
56
29
15
16
25
65
35
36
PARTS DIAGRAM
48
49
50
42 46
45
44
43
57 56
53
52
55
58
54
47
IN ORDER TO MAINTAIN WARRANTY, COMPONENTS MUST BE REPLACED USING ORIGINAL MANUFACTURERS PARTS PURCHASED THROUGH YOUR DEALER OR DIRECTLY FROM THE
APPLIANCE MANUFACTURER.
USE OF THIRD PARTY COMPONENTS WILL VOID THE WARRANTY.

16
Item Part No. Title Qty.
1 69800 Burn Chamber Enclosure Assembly 1 2 26195 Ignitor Cover 1 3 26196 Feed Tube Cover 2 4 80531 Rtd, Platinum 1 5 892004 Magnet 1 6 88180 Insulation, Right Sde- Chamber 1 7 26231 Rtd Mounting Bracket 1 8 891748 Burnpot Weldment 1 9 80619 Ignitor Cartridge 1 10 88118 Gasket, Ignitor Flange 1 11 69820 Ignitor Tube 1 12 892397 Burn Chamber Door 1 13 26175 Clean Door, Burn Chamber 1 14 89586 Auger Nipple 1 15 88184 Gasket Clean Door, Burn Chamber 1 16 88118 Gasket, Ignitor Flange 1 17 83529 Hairpin 1 18 891169 Hose, Heater 2 19 80529 Auger Motor 1 20 891132 Agitator Bushing 1 21 83534 Retaining Ring 1 22 892393 Auger 1 23 26237 Retaining Bracket, Auger Bushing 1 24 88033 Gasket - Combustion Chamber 1 25 69814 Door Switch Assembly 1 26 26204 Enclosure, Distribution Fan 1 27 80542 3" Double Centrifugal Blower - 125Cfm 1 28 26205 Enclosure Panel, Distribution Fan 1 29 26210 Exteners, Room Fans 2 30 26200 Panel, Main Cabinet Top And Side 1 31 88178 Insulation, Wrapped- Chamber 1 32 88179 Insulation, Left Side - Chamber 1 33 891148 Handle, Plastic 1 34 26217 Lid, Hopper 1 35 80462 Receptacle, 3 Prong 1 36 26229 Cover, Auger Access 1 37 69811 Door Switch Assembly 1 38 69808 Wall Mount Bracket Assembly 1 39 80573 Blower, Exhaust - 70 Cfm 1
PARTS LIST
Item Part No. Title Qty.
40 88182 Main Gasket - Exhaust Blower 1 41 892395 Right Door Assembly 1 42 26208 Left Front Door, Main 1 43 26199 Back Panel, Main Door 1 44 88181 Insulation, Left Front Door 1 45 26218 Door Spacer 2 46 892396 Weldment, Exhaust Louver 1 47 892174 Door Plunger 1 48 26216 Frame, Viewing Window 1 49 892215 Door Viewing Glass 1 50 88087
(4880)
Gasket, Window, .125 X 1 W/Psa 1
51 892394 Left Door Assembly 1 52 26209 Front Door, Right 1 53 26214 Back Panel, Left Door 1 54 80555 Pwa, Display Board 1 55 69812 Assembly, Frame 01 1 56 89390A Rubber Grommet (3/8 Id) 1 57 26230 Pc Board Cover Plate 1 58 80550 Assy, Keypad 1 59 26185 Exhaust Panel, Top, Bottom, And Back Side 1 60 26187 Exhaust Panel, Right Side 1 61 891121 Vaccum Hose 1
69809 Contol Board Assembly 1
62 26211 Bracket, Pressure Switch/Pc Board Mounting 1 63 80545 Assy, Controller Board 1 64 80549 Pressure Switch 1 65 26360 Exhaust/Intake Beautyring 1 66 892208 Duravent Direct Vent (35Cvs-Ad) 1
892392 Flame Suppressor Plate 80650 Wire Harness Main

17
WIRING DIAGRAM

This manual will help you obtain efficient, dependable service from your Pellet heater, and enable you to order repair
parts correctly.
Keep this manual in a safe place for future reference.
When writing, always give the full model number which is on the nameplate attached to the heater.
When ordering repair parts, always give the following information as shown in this list:
1. The part number
2. The part description
3. The model number: 4840
4. The serial number:____________________
HOW TO ORDER REPAIR PARTS
UNITED STATES STOVE COMPANY
227 Industrial Park Road
P.O. Box 151
South Pittsburg, TN 37380
[phone]
WWW.USSTOVE.COM

Warranty Registration Form
Please take a moment and properly register your new stove
within 10 days of purchase by completing this form.
You can also complete this form by visiting us at usstove.com
O wner: ____________________________________________________________________
Address: __________________________________________________________________
City: ____________________________ State: __________ Zip: ______________________
Email Address: ______________________________________________________________
Phone: ____________________________________________________________________
Dealer/ Store: ________________________________________________________________
City: ____________________________ State: __________ Zip: ______________________
Stove Model: ________________________________________________________________
Serial N umber: ______________________________________________________________
Date Purchased: ____________________________________________________________
Date Installed: ______________________________________________________________
PLEASE COMPLETE THE SURVEY BELOW:
How do you currently heat your home?
Electric Natural Gas Propane Heating Oil Wood Pellet
How did you hear aboutUnited States Stove Company?
Internet Local Store Dealer Friends/ Relatives Tr a d e S how
O ther: ________________________________________________________________
W hat were your reasons for selecting one of our products? (check all that apply)
Convenience Salesperson Appearance Price Heating Bill Savings
Performance Add On Quality
W here is your hearth appliance installed?
Living Room Family Room Den/ Office Bedroom Sun Room
Outdoor Kitchen Bath Masonry Fireplace
W ere you sa tisfied with the ser vice of the dea ler/ stor e? YES NO
Did you find the unit you were looking for? YES NO
May we contact you regarding your dealer, your purchase or your unit? YES NO
Plea se ra te your dea ler/ store on the followi ng:
Product Knowledge Excellent G ood Fair Poor
G ener a l A tti tude Excellent G ood Fair Poor
O verall Service Excellent G ood Fair Poor
PLEASE SEAL W ITH CLEAR TAPE BEFORE MAILING

______________________
______________________
______________________
United States Stove Company
227 Industrial Park Road
South Pittsburg, TN 37380
Attn: Registration Form
PLACE
STAMP
HERE
PLEASE SEAL WITH CLEAR TAPE BEFORE MAILING 851997