Osburn HYBRID-45 MF User manual

PROFESSIONAL INSTALLATION IS HIGHLY RECOMMENDED
Manufactured by:
Stove Builder International Inc.
Quebec City (Quebec)
CANADA
45165
• Warning: If your appliance is not properly installed a house fire may result. For your safety, follow
the installation directions. Contact local building or fire officials about restrictions and installation
inspection requirements in your area.
• PLEASE read this entire manual before installation and use of this pellet fuel-burning room heater.
Failure to follow these instructions could result in property damage, bodily injury, or even death.
• Save these instructions.
• Some surfaces become hot at higher feeding rates. To prevent potential burns, avoid contact with
those areas.
OWNER’S MANUAL
MODEL HYBRID-45 MF

Thank you for purchasing the HYBRID-45 MF pellet stove. You are now prepared to burn
wood in the most efficient, convenient way possible. To achieve the safest, most efficient and
most enjoyable performance from your stove, you must do three things: 1) Install it properly;
2) Operate it correctly; and 3) Maintain it regularly. The purpose of this manual is to help you
do all three.
PLEASE read this entire manual before installation and use of this pellet fuel-burning
room heater. Failure to follow these instructions could result in property damage,
bodily injury or even death.
Keep this manual handy for future reference.
You Osburn Hydbrid-45MF has been independently tested to ASTM E1509-95 Standard
Specification for Room Heaters, Pellet Fuel Burning Type 1, UL 1482-1998 Standard for Solid
Fuel Room Heaters, Oregon Administrative Rules for Mobile Homes (814-23-900 through
814-23-909) and Installation as a Stove Heater.
This pellet stove, when installed, must be electrically grounded in accordance with local
codes, or in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70
and CSA-C22.1.
This appliance is designed specifically for use only with pelletized wood. It is designed for
residential installation according to current national and local building codes as a freestanding
room heater. It is also approved as a mobile home heater which is designed for connection to
an outside combustion air source.
The stove will not operate using natural draft or without a power source for the blower
systems and fuel feed system and must not be burned with any type of coal.
This stove is designed to provide the optimum proportions of fuel and air to the fire in order to
burn free of smoke and soot. Any blockage of the air supply to or from the stove will seriously
degrade its performance and will be evidenced by a smoking exhaust and a sooting window.
For best operation, the ash content of the pellet fuel should be less than 1% and the calorific
value approximately 8,200 BTU/LB. Avoid high ash content fuels because this will rapidly fill
up the burn pot and eventually cut off the combustion air supply.
Commercial and industrial installations of the Osburn Hybrid-45 MF should not be used since
operational control is often not well managed in these settings.
INTR
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REGISTER YOU WARRANTY ONLINE
To receive full warranty coverage, you will
need to show evidence of the date you
purchased your stove. Keep your sales
invoice. We also recommend that you
register your warranty online at
www.osburn-mfg.com Registering your
warranty online will help us track rapidly
the information we need on your stove.

• Do not operate your stove if you
smell smoke coming from it. Turn it off,
monitor it, and call your dealer.
• Keep foreign objects out of the
hopper.
• Never use gasoline, gasoline-
type lantern fuel, kerosene, charcoal lighter
fluid, or similar liquids to start or “freshen
up” a fire in this stove. Keep all such liquids
well away from the stove while in use.
• Do not throw this manual away.
This manual has important operating and
maintenance instructions that you will need at
a later time. Always follow the instructions in
this manual.
• Never block free airflow through
the open vents of the stove.
• Do not place clothing or other
flammable items on or near the stove.
• Never try to repair or replace any
part of the stove unless instructions are
given in this manual. All other work should
be done by a trained technician.
• The viewing door must be closed
and latched during operation.
• The stove will not operate during
a power outage. If an outage does occur,
check the stove for smoke spillage and
open a window if any smoke spills into the
room.
• Do not operate the stove if the
flame becomes dark and sooty or if the
burnpot overfills with pellets. Turn the stove
off, periodically inspect it, and call your
dealer.
• Disconnect the power cord
before performing any maintenance or
repairs on the stove.
NOTE: Turning the stove “off” does not
disconnect all power from the stove.
• Do not touch the hot surfaces of the
heater. Educate all children of the danger of a
high temperature stove. Young children
should be supervised when they are in the
same room as the stove.
• Do not unplug the stove if you
suspect a malfunction. Turn the stove off,
periodically inspect it, and call your dealer.
• If the stove is installed in a room
without air conditioning, or in an area where
direct sunlight can shine on the unit, it is
possible this can cause the temperature of
the stove to rise to operational levels; one of
the sensors could then make the stove start
on its own. It is recommended that the stove
be unplugged when not in use for extended
amounts of time (i.e. during the summer
months).
• Contact your local building
officials to obtain a permit and information
on any installation restrictions or inspection
requirements in your area. Notify your
insurance company of this stove as well.
• The exhaust system must be
completely airtight and properly installed. The
pellet vent joints must be sealed with RTV
500°F. (260°C.) silicone sealant, and with UL-
181-AP foil tape.
• This unit must be properly
installed to prevent the possibility of a
house fire. The instructions must be strictly
adhered to. Do not use makeshift methods
or compromise in the installation.
• Your stove requires periodic
maintenance and cleaning. Failure to
maintain your stove may lead to smoke
spillage in your home.
• Allow the stove to cool before
carrying out any maintenance or cleaning.
Ashes must be disposed in a metal
container with a tight lid and placed on a
non combustible surface well away from
the home structure.
• This stove is designed and
approved for pelletized wood fuel only. Any
other type of fuel burned in this heater will
void the warranty and safety listing.
• This stove must be connected to
a standard 120 V., 60 Hz grounded
electrical outlet. Do not use an adapter
plug or sever the grounding plug. Do not
route the electrical cord underneath, in
front of, or over the stove.
• When installed in a mobile home,
the stove must be bolted to the floor, have
outside air, and NOT BE INSTALLED IN A
BEDROOM (Per H.U.D. requirements).
Check with local building officials.
• The exhaust system should be
checked, at a minimum, at least twice a
year for any build up of soot or creosote.
• Stove Builder International Inc.
grants no warranty, implied or stated, for
the installation or maintenance of your
stove, and assumes no responsibility of
any consequential damage(s).
S
AFETY PRE
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3

INTRODUCTION --------------------------------------------------------------------------------------------- 2
SAFETY PRECAUTIONS ---------------------------------------------------------------------------------- 3
SPECIFICATIONS ------------------------------------------------------------------------------------------- 5
INSTALLATION --------------------------------------------------------------------------------------------- 5
Preparation ----------------------------------------------------------------------------------------- 5
Clearances ----------------------------------------------------------------------------------------- 5
Combustion Air Supply -------------------------------------------------------------------------- 6
When Outside Air Is Not Used ----------------------------------------------------------------- 6
Venting ----------------------------------------------------------------------------------------------- 6
Freestanding Installations ---------------------------------------------------------------------- 7
Log set installation --------------------------------------------------------------------------- 10
OPERATION --------------------------------------------------------------------------------------------------- 11
Proper Fuel ----------------------------------------------------------------------------------------- 11
Pre-Start-Up Check ------------------------------------------------------------------------------- 11
Building a Fire ------------------------------------------------------------------------------------- 11
Lighting procedure ----------------------------------------------------------------------------------- 11
Unit Controls ------------------------------------------------------------------------------------- 11
Opening Door -------------------------------------------------------------------------------------- 12
Convection blower -------------------------------------------------------------------------------------- 12
If Stove Runs Out Of Pellets -------------------------------------------------------------------- 13
Damper Control ------------------------------------------------------------------------------------ 13
Refueling --------------------------------------------------------------------------------------------- 13
Shutdown Procedure ----------------------------------------------------------------------------- 13
Safety Features ------------------------------------------------------------------------------------ 13
Optional Thermostat ------------------------------------------------------------------------------ 14
Thermostat Installation -------------------------------------------------------------------------- 14
(Please Read This) Operating Safety Precautions -------------------------------------- 15
MAINTENANCE ---------------------------------------------------------------------------------------------- 16
Ash Removal ---------------------------------------------------------------------------------------- 16
Ash Disposal ---------------------------------------------------------------------------------- 16
Vacuum Use ---------------------------------------------------------------------------------------- 17
Cleaning ---------------------------------------------------------------------------------------------- 17
Blowers ---------------------------------------------------------------------------------------------- 17
Chimney Cleaning -------------------------------------------------------------------------------- 18
Recommended Maintenance Schedule ----------------------------------------------------- 18
Removal & Replacement of Broken Door Glass ------------------------------------------ 18
TROUBLE SHOOTING GUIDE -------------------------------------------------------------------------- 19
ELECTRICAL DIAGRAM --------------------------------------------------------------------------------- 25
REPLACEMENT PARTS LIST -------------------------------------------------------------------------- 26
WARRANTY ----------------------------------------------------------------------------------------------- 27
TABLE
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OSBURN HYBRID-45 MF FREESTANDING PELLET STOVE
Width: 27”
Height: 30 1/2”
Depth: 24 5”
Weight: 230 lbs.
Flue size: 3” or 4”
Hopper Capacity: Up to 70 lbs.
(This can vary widely depending on pellet size, length, and diameter)
EPA status: exempt
Burn rate: 1 lb. to 5.5 lbs. per hour
BTU range: 8,200 to 45,000
Electrical consumption: 3.5 Amps lighting cycle
2.5 Amps. continuous duty
Control board fuses: Main: 7.5A-250V fastblow
Igniter: 5A-250V fastblow
Electrical requirement: 120VAC 15A
Approved installations: mobile home, conventional
PREPARATION
Factory packaging must be removed, and some minor assembly work is required
prior to installation:
• The door overlay must be installed on the door frame;
• The louver kit must be installed in front of the heat exchanger.
NOTE: Normally, your dealer will perform these functions.
CLEARANCES
The Osburn Hybrid-45 MF has been tested and listed for installation in residential,
mobile home.(refer figure 1 & 2)
FLOOR PROTECTION: minimum 6” in the front and 6” on each side. The stove
must be placed on a continuous (grouted joints) noncombustible material such as
ceramic tile, cement board, brick, 3/8” millboard or equivalent, or other approved or
listed material suited for floor protection. NOTE: ceramic tile, or any tile, requires a
continuous sheet beneath to prevent the possibility of embers falling through to the
combustible floor if cracks or separation should occur in the finished surface, this
would include floor protection for Built-in raised hearths. Check local codes for
approved alternatives.
Clearances are measured from the sides, back and face (door opening) or stove
body (refer to fig. 3).
DO NOT USE MAKESHIFT MATERIALS OR COMPROMISES IN THE
INSTALLATION OF THIS UNIT.
INSTALL VENT WITH CLEARANCES SPECIFIED BY THE VENT
MANUFACTURER.
3"
2" *
6"
SIDE WALL
BACK WALL
2" 3"
3"
2"
ADJACENT WALL
ADJACENT WALL
6"
6"
6"
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FIGURE 1
Back wall installation
FIGURE 2
Corner installation
FIGURE 3
Floor protection

COMBUSTION AIR SUPPLY
For a mobile home installation the stove must be connected to an
outside source of combustion air. A 3” inside diameter metallic pipe,
either flexible or rigid, may be attached to the inlet at the stove’s rear
(refer to figures 4, 5 & 6). A rodent guard (minimum ¼” wire mesh)
must be used at the terminus (refer to figure 5). All connections must
be secured and airtight by either using the appropriately sized hose
clamp and/or UL-181-AP foil tape.
For mobile home installations only: No combustion air supply
may exceed 10 feet.
Sources of Outside Combustion Air
• A hole in floor near stove rear terminating only in a
ventilated crawl space.
• A hole in the wall behind the stove.
WHEN OUTSIDE AIR IS NOT USED
If outside air is not used, it is important that combustion air be easily
available to the air inlet. A closeable outside air register can be used
in tightly insulated homes.
VENTING
The Osburn Hybrid-45 MF is certified for use with Vent type UL-103
or ULC S629M and Chimney type UL-641 or ULC S609, 3” or 4”
diameter in size. This unit can be installed in an existing chimney
with the addition of a liner if it’s more than 4” in diameter. Class “A”
chimney is not required. Refer to the instructions provided by the
vent or chimney manufacturer, especially when passing through a
wall, ceiling or roof.
This is a pressurized exhaust system. All vent connector joints must
be sealed with 500°F (260°C) RTV silicone sealant to ensure
consistent performance and avoid smoke spillage. All horizontal
connector joints must be sealed with UL-181-AP foil tape. We
recommend that all vertical vent connector joints be secured with a
minimum of 3 screws.
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING
ANOTHER APPLIANCE.
DO NOT INSTALL A FLUE DAMPER IN THE EXHAUST VENTING
SYSTEM OF THIS UNIT.
INSTALL VENT AT CLEARANCES SPECIFIED BY THE VENT
MANUFACTURER.
WARNING DO NOT INSTALL IN SLEEPING ROOM
CAUTION THE STRUCTURAL INTEGRITY OF THE
MANUFACTURED HOME FLOOR, WALL, AND CEILING/ROOF
MUST BE MAINTAINED
AIR INLET EXHAUST
TRIM
COLLAR
RODENT
GUARD
VENTILATED
CRAWL SPACE
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FIGURE 4
Rear view
FIGURE 5
Fresh air supply
FIGURE 6
Fresh air supply

Equivalent Vent Length (EVL)
The longer the run of pipe in your installation, the more restriction
there is in the system. Therefore, larger diameter pipe should be
used.
• Use 4” pipe if you have more than 15 feet of Equivalent Vent
Length (EVL).
• Horizontal runs shall not exceed 10 feet of EVL.
• To calculate EVL, use the following conversions table:
Qty Type of pipe EVL equivalent(ft)
1 90° elbow or “T” 5
1 45° elbow 3
1 ft Horizontal pipe run 1
1 ft Vertical pipe run 0.5
NOTE: At altitudes above 3,000 feet, we suggest the use of 4”
diameter vent at an EVL of 7 feet or more.
Here is an exemple on how to calculate the EVL of your installation.
(See Figure 8)
(3 x 4’ of vertical length = 12’ x 0.5 = 6 EVL) + (1 x elbow or "T" = 5
EVL) + (2 x 1’ of horizontal length = 2 EVL)
Total EVL = (6 + 5 +2) = 13. So 3” diameter vent is allowed
INSTALLATION CONFIGURATIONS
A. HORIZONTALLY THROUGH WALL (refer to Figure 7 & 8)
NOTE: Follow L-Vent chimney manufacturer’s instructions.
1. Position stove, adhering to clearances shown in Figures 1 & 2.
2. Locate position of hole in wall; directly behind stove exhaust
vent (refer to figure 4).
3. Always maintain 3” clearance from combustible materials.
4. Install L-Vent wall thimble per L-Vent manufacturer’s
instructions.
5. Attach enough piping to penetrate and extend at least 6”
beyond exterior walls. An 8-foot vertical pipe run is suggested
where possible to reduce the possibility of smoke spillage in
the event of a loss of negative pressure.
6. Attach cap and seal outside wall thimbles with non-hardening
waterproof mastic.
Termination should not be located so that hot exhaust gases can
ignite trees, shrubs, or grasses or be a hazard to children. Exhaust
gases can reach temperatures of 500ºF and cause serious burns if
touched.
90 DEGREE ELBOW
45 DEGREE ELBOW
TERMINATION
COLLAR
WALL
STRAP
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
WALL
THIMBLE
CLEAN OUT
TEE
WALL
STRAP
CLEAN OUT
TEE
VERTICAL ROOF VENT
1' HORIZONTAL RUN EVL = 1'
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
1' HORIZONTAL RUN EVL = 1'
90° ELBOW "T" LEE = 5'
VERTICAL LENGTH 4' EVL = 4 X 0.5' = 2'
VERTICAL LENGTH 4' EVL = 4 X 0.5' = 2'
VERTICAL LENGTH4' EVL = 4 X 0.5' = 2'
COUPE-FEU
MURAL
Locate terminations: a) not less than 3 feet above any forced
air inlet located within 10 feet; b) not less than 4 feet below or
horizontally from, or one foot above, any door, window or
gravity air inlet into any building; c) not less than two feet from
an adjacent building and not less than 7 feet above grade
when located adjacent to a public walkway. Mobile home
installations must use a spark arrester.
7
FIGURE 7
Ventin
g
throu
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h wall
FIGURE 8
Venting through wall
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A. VERTICALLY WITH NEW CHIMNEY SYSTEM (Refer to Figure 9
& 10 for basement installation)
NOTE: Follow L-Vent chimney manufacturer’s instructions.
OPTION: To achieve a center vertical installation, a 45º elbow and a
clean-out tee can be used to offset the pipe from the exhaust outlet to
the rear center of the stove.
OPTION: Install L-Vent elbow in place of clean-out tee. Locate stove.
Drop plumb bob to center of tee outlet, mark point on ceiling. Install
ceiling support and L-Vent pipe per L-Vent manufacturer’s instructions.
1. Always maintain 3” clearance from combustible materials. When
passing through additional floors or ceilings, always install firestop
spacer.
2. After lining up for hole in roof, cut either around or square hole in
roof, always 3” larger all the way around pipe. Install upper edge
and sides of flashing under roofing materials, nail to the roof along
upper edge. Do not nail lower edge. Seal nail heads with non-
hardening waterproof mastic.
3. Apply non-hardening, waterproof mastic where the storm collar will
meet the vent. Slide storm collar down until it sits on the flashing.
Seal and install cap. Mobile home installations must use a spark
arrester.
B. VERTICALLY INTO EXISTING CHIMNEY SYSTEM
As an alternative, 3” or 4” L-Vent can be run inside existing chimney to
termination(Figure 11). This is the preferred method.
Follow guidelines for equivalent vent length.
BASEMENT INSTALLATION
FOR BASEMENT INSTALLATION
A 4" PIPE IS RECOMMANDED
WALL
STRAP
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
CLEAN OUT
TEE
CLEAN OUT
TEE
VERTICAL ROOF VENT
12" MINIMUM
CLEARANCE
TO ROOF
CLEAN OUT
TEE
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
ATTIC
INSULATIO
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SHIELD
FIGURE 9
Venting through roof
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FIGURE 11
Venting through
existin
g
chimne
y
FIGURE 10
Basement installation

C. VERTICALLY INTO EXISTING MASONRY
FIREPLACE
NOTE: Follow L-Vent chimney manufacturer’s instructions.
1. Have the masonry chimney inspected by a qualified
chimney sweep or installer to determine its structural
condition.
2. You will need a pipe length equal to the chimney height
from the hearth. If outside combustion air is to be used, you
will need a pipe length equal to the chimney height plus 18
inches.
3. Install a blanking plate and the chimney pipe, and if used
the outside air pipe, as shown in Figure 12.
4. Attach the DuraVent adapter, a section of pipe and clean
out tee, making sure the clean out tee is centered in the
chimney flue area. Use RTV, metallic tape, and a minimum
of three self-taping screws at all joint connections to ensure
a tight seal.
5. Position the stove, adhering to the clearances in Figures 1
& 2.
6. Measure and build chimney top plate. Cut out holes for
chimney pipe, and if used the outside air pipe. Install and
seal with non-hardening mastic to prevent water leakage.
Install vent cap.
TOP PLATE
BLANKING PLATE
OPTIONAL
OUTSIDE AIR
CLEAN OUT
TEE
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
6"
3"
VERTICAL ROOF VENT
D. INSTALLATION THROUGH SIDE OF MASONRY
CHIMNEY
NOTE: Follow L-Vent chimney manufacturer’s instructions.
1. Position the stove, adhering to the clearances in Figures 1
& 2. Mark the center of the hole where the pipe is to pierce
the masonry chimney.
2. It will be necessary to break out the masonry around the
location of the pipe center mark. Use a 4-inch diameter
hole for 3-inch pipe and 5-inch diameter hole for 4-inch
pipe.
3. Measure and build chimney top plate. Cut out holes for
chimney pipe, and if used the outside air pipe.
4. Install the tee on the bottom of the vertical pipe system and
lower it down the chimney until the center branch of the tee
is level with the center of the hole in the masonry, as
shown in Figure 13.
5. Install and seal the top plate from step 3 with non-
hardening mastic. Slip the storm collar over the pipe, and
while holding the pipe at the proper elevation, affix the
collar with a minimum of three ¼” stainless steel sheet
metal screws. Seal all joints and seams around the collar.
6. Connect the horizontal pipe by pushing it through the hole
in the masonry and lining it up with the branch in the tee.
Push the pipe into the tee while twisting it to lock it into the
tee.
7. If desired, once the horizontal pipe is in place, the space
between the pipe and masonry may be filled with high-
temperature grout.
Install the trim collar. An adjustable pipe length and adapter may
be needed to finish the connection to the stove.
VERTICAL ROOF VENT
TOP PLATE
WALL
THIMBLE
CLEAN OUT
TEE
OPTIONAL
OUTSIDE AIR
FOLLOW CHIMNEY OR
VENT MANUFACTURER'S
INSTRUCTIONS
6"
3"
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Figure 12
Venting through
masonry chimney
Figure 13
Venting through side
of masonry chimney
9

OPTIONAL LOG SET INSTALLATION
To install the optional log set, you first need to remove the four screws
indicated on figure 14a. Keep the screws. Locate the two fixation
brackets figure 14b that came with your owner’s manual. Fix the two
brackets using the same screws you have removed. Lay the log set
inside the firebox as shown on figure 14d & 14e
SCREWS SCREWS
LOG SUPPORTLOG SUPPORT
LOG SUPPORT
LOG SET
Figure 14c
Location of supports
Figure 14d
Log set positioning
Figure 14e
Log set positioning
Figure 14b
Log set supports
Figure 14a
Fixation of supports
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PROPER FUEL
THIS STOVE IS APPROVED FOR BURNING PELLETIZED WOOD
FUEL ONLY! Factory-approved pellets are those ¼” or 5/16” in
diameter and not over 1” long. Longer or thicker pellets sometimes
bridge the auger flights, which prevents proper pellet feed. Burning
wood in forms other than pellets is not permitted. It will violate
the building codes for which the stove has been approved and
will void all warranties. The design incorporates automatic feed of
the pellet fuel into the fire at a carefully prescribed rate. Any
additional fuel introduced by hand will not increase heat output but
may seriously impair the stoves performance by generating
considerable smoke. Do not burn wet pellets. The stove’s
performance depends heavily on the quality of your pellet fuel.
Avoid pellet brands that display these characteristics:
a. Excess Fines – “Fines” is a term describing crushed pellets or
loose material that looks like sawdust or sand. Pellets can be
screened before being placed in hopper to remove most fines.
b. Binders – Some pellets are produced with materials to hold
them together, or “bind” them.
c. High ash content – Poor quality pellets will often create smoke
and dirty glass. They will create a need for more frequent
maintenance. You will have to empty the burn pot plus vacuum
the entire system more often. Poor quality pellets could
damage the auger. Osburn cannot accept responsibility for
damage due to poor quality pellets. Your dealer can
recommend a good quality pellet dealer in your area.
PRE-START-UP CHECK
Remove burn pot, making sure it is clean and none of the air holes
are plugged. Clean the firebox, and then reinstall burn pot. Clean
door glass if necessary (a dry cloth or paper towel is usually
sufficient). Never use abrasive cleaners on the glass or door. Check
fuel in the hopper, and refill if necessary.
NOTE: The Osburn Hybrid-45 MF Hopper can hold up to 70 lbs. of
pellets.
BUILDING A FIRE
Never use a grate or other means of supporting the fuel. Use only
the Osburn approved burn pot.
NOTE: During the first few fires, your stove will emit an odor and a
small amount of fumes as the high temperature paint cures or
becomes seasoned to the metal. Maintaining smaller fires will
minimize this. Avoid placing items on stovetop during this period
because paint could be affected. Make sure the room is well-
ventilated. Open windows. Odors and fumes released during
this process are unpleasant but they are not toxic.
LIGHTING PROCEDURE
a. Fill hopper and clean burn pot.
b. Press “MODE” button to select the desired setting “MANUAL”
or ‘THERMOSTAT”
c. If the flame is too low in burn pot or the unit has difficulty to
light, reduce the air supply by turning the air supply control
knob toward the minimum setting. The knob is located on the
side of the unit. Once the fire is established, adjust the air
supply knob to the desired flame height.
d. Adjust feed rate to desired setting by pressing “-” or “+” button.
If fire doesn’t start in 30 minutes, refer to troubleshooting section.
UNIT CONTROLS (See Figure 15)
The blowers and automatic fuel supply are controlled from a panel
on the right-hand side of the Hybrid-45 MF. The control panel
functions are as follows.
FIGURE 15
PC board
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a. MODE SWITCH
• When the mode switch is pressed, the stove will automatically ignite. If the manual mode is selected, the heat level must be selected
manually to adjust the stove’s heat output to the desired level. If the thermostat mode is selected, the stove will automatically modulate
between the lowest heat level and the heat level selected to keep the room temperature at the thermostat’s setting. If the set room
temperature is achieved while the stove has been running at the lowest heat level for more than 45 minutes, the unit will automatically
shut off and will start another ignition cycle only when the thermostat calls for heat again. No fire starter is necessary to ignite the unit.
The auger will feed fuel for 4 minutes and the electronic igniter will stay on for 10 minutes. If the unit doesn’t ignite within 15 minutes,
the stove will wait for 5 minutes and will start a second ignition cycle. If ignition fails a second time, an error message will appear on
control panel.
• The Heat Level may be selected during the ignition cycle. However, the unit will only feed fuel at the desired heat level setting when the
heat sensor located into the stove will receive a signal indicating that the unit has been fully ignited. This may take anywhere between
10 and 15 minutes.
b. FUEL FEED SWITCH
• When the “Fuel Feed” button is pushed and held down the stove will feed pellets continuously into the burn pot.
CAUTION: THIS FUNCTION CAN ONLY BE OPERATED WHEN THE STOVE IS IN “OFF” POSITION. THE FUEL FEED SWITCH IS
USED TO PRIME THE AUGER WHEN AUGER IS EMPTY.
c. NOISE REDUCER
• The convection blower speed varies directly with the fuel feed rate.
• When the “NOISE REDUCER” button is pushed, the convection blower will switch to its lowest speed. The convection blower will
remain at its lowest speed unless the stove reaches a certain temperature. If this occurs, the convection blower will go back to its
highest setting to cool down the stove. The low noise button will have to be pressed again for the convection blower to go back to its
lowest speed.
d. HEAT LEVEL
• By pressing “+” or “-“, you can set the pellet feed rate and hence the heat output of your stove. The levels of heat output will
incrementally change and each LED indicate the level from 1 to 6.
e. RESET
Reset button has to be used to clear any error on the control and restart your stove.
OPENING DOOR
The door should be open only for maintenance purposes.
CONVECTION BLOWER (ROOM AIR FAN)
Upon starting your stove, the convection blower will not come on until the stove’s heat exchanger warms up. This usually takes about 10 to
15 minutes from start-up. Speed will vary with the selected feed rate, except if the noise reducer mode has been activated.
COMBEXtm
Your stove uses a unique patented technology called COMBEX. As opposed to most other pellet stoves, which use
only an exhaust blower, your Osburn Hybrid-45MF uses a motor on which are mounted two housings with impeller
blades. One housing serves for combustion, and the other for exhaust. This is why we refer to the
combustion/exhaust blower throughout this manual. The COMBEX system balances combustion air and uptake to
provide clean, worry-free combustion which is less dependent on the leak-tightness of the device and the quality of
the combustible.
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IF THE STOVE RUNS OUT OF PELLETS
The fire goes out and the auger motor and blowers will run until the stove cools down. This will take a few minutes.
After the stove’s components stop running, an error message will appear .
To restart, press the “RESET” button, refill the hopper , and press the “FUEL FEED” button until pellets begin to fall into the burn pot.
Press the “MODE” button to start the unit on Manual or Thermostatic mode.
DAMPER CONTROL
The damper control rod on the stove’s lower right side adjusts the combustion air. This control is necessary due to the varied burn
characteristics of individual installations and different pellet brands. It allows you to improve the efficiency of your stove. Providing correct
combustion air will reduce the frequency of cleaning your glass door and prevent the rapid buildup of creosote inside your stove and
chimney.
You should adjust the damper based on the fire’s appearance. A low, reddish, dirty fire can be improved by increasing the air supply using
the control knob located on the side of the unit. A “blow torch” fire can be improved by reducing the air supply.
Through trial and error, you will find the best setting. Consult your dealer if you need help.
REFUELING
We recommend that you not let the hopper drop below ¼ full. If the reload lid stays for open more than 3 minutes, an error will appear.
To restart, press the “RESET” button, and then press the “MODE” button to start the unit on Manual or Thermostatic mode.
KEEP HOPPER LID CLOSED AT ALL TIMES EXCEPT WHEN REFILLING. THE HOPPER MAY BE FILLED WHILE THE STOVE IS
OPERATING. DO NOT OVERFILL HOPPER.
SHUTDOWN PROCEDURE
Turning your Osburn stove off is a matter of pressing the “MODE” control panel switch, until the “OFF” led goes on. The blowers will
continue to operate until internal firebox temperatures have fallen to a preset level.
SAFETY FEATURES
a. Your stove is equipped with a re-settable high temperature switch (also called heat sensor or heat switch). The switch has a reset
button on its backside. Like a circuit breaker, once tripped, the reset button will have to be pushed before you can restart the
stove. The high temperature switch is there to protect the stove from overheating in case of an evacuation problem, a control
board problem, a blower problem, or any other problem causing the unit to overheat. The manufacturer recommends that you call
your dealer if this occurs as it may indicate a more serious problem. A service call may be required.
NOTE: If an overheating situation occurs, the high temperature switch (called the L-250 manual reset) will automatically shut
down the auger (fuel feed system) and an error code will appear.
b. If the combustion blower fails, an air pressure switch will automatically shut down the auger and an error message will
appear. This safety feature is to prevent the unit from burning fuel when the combustion/exhaust blower has failed, therefore
preventing combustion fumes from spilling into the room.
c. If the temperature in the auger rises beyond a certain acceptable level, a second high temperature switch located on the auger
housing will stop the fuel feed system and an error will appear.
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OPERATING THE STOVE USING A THERMOSTAT
A thermostat may help you maintain a constant house
temperature automatically. A millivolt thermostat or 24 Volt
thermostat is required. A fixed wall mount or hand held model can
be used. The control panel can be set up two ways to operate
your stove in thermostatic mode.
THERMOSTAT INSTALLATION
• Unplug the stove from the power outlet.
• Connect two thermostat wires to the terminal block located
on the lower right side of the back of the stove. To do so,
loosen the two screws and insert the wires in the terminals.
Tighten the two screws. (See figure 16)
• If you are using a wireless wall thermostat or a hand held
thermostatic remote control, you can locate the receiver
behind the stove’s back panel, on the right end side, just
below the terminal block. Most receivers are already
equipped with quick-connect terminals. Simply unplug the
PC board wires connected to the back of the terminal block
and connect them directly with the receiver’s terminals.
Location of the thermostat is very important to obtain the
best comfort and efficiency from you Hybrid-45 MF. The
thermostat should be mounted 50 inch from the floor on a
wall located 15 to 20 feet from the stove. You should avoid
an installation directly in front of the stove to avoid
cycling.(See figure 17)
MODES
THERMOSTATIC MODE
• To use this mode, the “MODE” button must be pushed to
“Thermostat” upon starting the stove. The heat setting is then
selected using the “Heat Level” selector “+ or –“. When set in
thermostatic mode, the stove will automatically run a the heat
level selected until the set room temperature is reached.
When that occurs, the stove will switch to heat setting #1
(lowest) until the thermostat calls for heat again. The
convection blower will also slow to its lowest speed. When
the thermostat calls for heat again, the stove will increase its
feed rate to match the heat setting selected.
• N.B.: If the room temperature remains stable and the
thermostat does not call for heat during at least 45 minutes,
the stove will shut down. When the thermostat calls for heat
again, the stove will start an ignition cycle. Once the ignition
cycle is completed, the stove will increase its feed rate to
match the heat setting selected.
NOTE: When in thermostatic mode:
• You should not operate the manual control or play with the
temperature setting.
• YOUR THERMOSTAT SHOULD BE INSTALLED BY AN
AUTHORIZED DEALER OR SERVICE PERSON.
The size of wires will vary with the distance:
DISTANCE DIAMETRE
20 pi 18GA
30 pi 16GA
40 pi 14GA
50 pi 12GA
THERMOSTAT WIRES
TERMINAL
D = MINIMUM DISTANCE 15 FEET
SHOULD BE AVOIDED
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FIGURE 16
Rear view
FIGURE 17
Thermostat location

OPERATING SAFETY PRECAUTIONS
PLEASE READ THIS!
a. If you notice a smoldering fire (burnpot full but no visible flame) AND a heavy smoke buildup in firebox,
immediately TURN OFF the stove, but DO NOT unplug it. Do not open the door, change the damper
setting or tamper with any controls on the stove. Wait until smoke inside the firebox clears and blowers
shut down. Do as instructed in “PRE-START-UP CHECK” and “LIGHTHING PROCEDURE”, then attempt
to restart the fire. If the problem persists, contact your dealer. Please note that smoke build-up during
ignition may occur. Smoke can accumulate in the firebox for a few seconds just before the igniter is hot
enough to fire-up the pellets in the burn pot. This is normal. As soon there is fire in the burn pot, smoke will
disappear.
b. DO NOT STORE OR USE FLAMMABLE LIQUIDS, ESPECIALLY GASOLINE, IN THE VICINITY OF
YOUR OSBURN STOVE. NEVER USE A GAS OR PROPANE TORCH, GASOLINE, GASOLINE-TYPE
LANTERN FUEL, KEROSENE, CHARCOAL LIGHTER FLUID OR SIMILAR FLUIDS TO START OR
“FRESHEN UP” A FIRE IN THIS HEATER.
c. WARNING: DO NOT OVERFIRE THIS STOVE. This may cause serious damage to your stove and void
your warranty. It also may create a fire hazard in your home. IF ANY EXTERNAL PART OF THE UNIT
BEGINS TO GLOW, YOU ARE OVERFIRING. Immediately press the “MODE” switch on the control panel,
until reaching the ‘OFF’ position. DO NOT UNPLUG YOUR STOVE. If you leave your house and your
stove is not connected to a thermostat or a fresh air supply, do not leave it at the maximum setting. If the
ambient air in a confined room becomes to hot, the stove may overheat and the thermal protection
on the combustion/exhaust motor may be activated, causing the motor to stop.
d. KEEP ALL LOOSE OR MOVEABLE HOUSEHOLD COMBUSTIBLES, SUCH AS FURNITURE, DRAPES,
TOYS, ETC. AT LEAST THREE FEET FROM THE OPERATING STOVE.
e. Maintain proper ventilation. It is important that adequate oxygen be supplied to the fire for the combustion
process. Modern houses are often so well insulated that it may become necessary to open a window
slightly or install an outside air vent to provide sufficient combustion air.
f. Since heating with solid fuel is potentially hazardous, even with a well made and thoroughly tested stove, it
would be wise to install strategically placed smoke detectors and have a fire extinguisher in a convenient
location, near an exit.
g. Do not open the stove door when operating unless necessary. This will create a dirty, inefficient burn and
could allow smoke spillage or sparks to escape.
h. Do not permit operation by young children or those unfamiliar with stove’s operation.
i. Do not service or clean this appliance without disconnecting the power cord.
j. Do not abuse the door glass by striking, slamming or similar trauma. Do not operate the stove with the glass
removed, cracked or broken.
k. If the stove is installed in a room without air conditioning, or in an area where direct sunlight can shine on
the unit, it is possible this can cause the temperature of the stove to rise to operational levels; one of the
sensors could then make the blowers start on their own. It is recommended that the stove be unplugged
when not in use for extended periods of time (i.e. during the summer months).
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FAILURE TO CLEAN AND MAINTAIN THIS UNIT AS
INDICATED CAN RESULT IN POOR PERFORMANCE AND
SAFETY HAZARDS. NEVER CLEAN WHEN HOT.
NOTE: Inspect burn pot periodically to see that holes have not
become plugged. If so, clean thoroughly.
ASH REMOVAL
Ashes should be placed in a metal container with a tight-fitting lid.
The closed container or ashes should be placed on a
noncombustible surface or on the ground, well away from all
combustible materials pending final disposal. If ashes are
disposed of by soil burial or otherwise locally dispersed, they
should be retained in the closed container until all cinders have
thoroughly cooled.
ASH DISPOSAL
The Osburn Hybrid-45 MF has an ash bin located below the
firebox. To remove ashes:
a. Make sure fire is out and the firebox is cool.
b. Open the door and remove the baffle from the firebox. Close
the door.
c. With the door closed, clean heat exchanger tubes by
activating the cleaning rod back and forth from front to back.
(see Cleaning section and Figure 18 & 19) .
d. Open the door and remove the burn pot by grasping it and
pulling straight out. Scrape the burn pot with a scraper if
necessary. Make sure that the burn pot holes are not
plugged. Empty ashes from the burn pot into the pedestal
ash bin through the opening at the bottom of the firebox. Put
the burn pot back in place. Make sure it is level and pushed
all the way in.
e. Scrape the ashes in the firebox into the pedestal ash bin
through the opening or the bottom of the firebox or vacuum
to remove ashes.
WARNING: Make sure ashes are cool to the touch
before using a vacuum. See “VACUUM USE”.
f. Periodically remove and empty the ash bin (see Figure 20)
by opening the front lid of the pedestal below the ash lip.
Dispose of ashes properly.
(See “ASH REMOVAL” above)
g. Put the ash bin back into place, making sure that you
tighten the knob and maintain a good seal. Inspect gasket
at the same time to make sure it is in good condition.
CONVECTION
BLOWER
AIR SUPPLY
KNOB
HIGH TEMPERATURE
SWITCH F-160
HIGH TEMPERATURE
SWITCH L-250
A
FIGURE 21
Side view
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FIGURE 18
Baffle removal
FIGURE 19
Cleaning rod
FIGURE 20
Ash drawer

VACCUM USE
If a vacuum is used to clean your stove, we suggest using a
vacuum designed for ashes.
Some regular vacuums and shop vacs leak ash into the room.
Your vacuum or shop vac may have a special filter or bag
available to eliminate this leakage.
CLEANING
a. Heat Exchange Tubes – Your Osburn Hybrid-45 MF
stove is designed with a built-in heat exchanger tube
cleaner. This should be used weekly to remove
accumulated ash on the tubes. To clean the heat
exchanger, open the door and grab the cleaning rod
located behind the louvers (just above the stove’s
door) and push it forward. Close the door. Slide the
cleaning rod back and forth two or three times from
front to back (refer to figure 19). When finished, push
the cleaning rod back in, behind the louvers.
b. Baffle: Remove the baffle and scrape off ashes. Use
a vaccum is necessary. In some cases, you will need
to remove creosote on the baffle, which can
accumulate rapidly under certain conditions. A small
wire brush can be used. It is important to remove this
creosote because it is highly combustible and could
cause premature corrosion.
c. Chamber walls: Periodically, you must vacuum the
ashes that may have accumulated on the main walls
of the combustion chamber. START BY REMOVING
THE DECORATIVE MASONRY-LIKE PANELS,
WHICH ARE SIMPLY HELD BY SCREWS. Scrape off
ashes. Use a vacuum is necessary. There is also a
cleaning outlet located behind the left side panel of the
combustion chamber. Remove this panel using a
screw driver. You will notice a small rectangular
cleaning outlet. Inspect behind this outlet (see figure
22) Insert the vacuum tip through the cleaning outlet
and clean thoroughly. REPEAT THIS OPERATION AT
LEAST ONCE PER TON OF PELLETS BURNED
UNTIL YOU ARE FAMILIAR WITH HOW ASHES
ACCUMULATE WITH YOUR OPERATING
PRACTICES.
BLOWERS
DANGER: RISK OF ELECTRIC SHOCK. DISCONNECT
POWER BEFORE SERVICING UNIT.
• Cleaning – Over a period of time, ashes or dust may
collect on the blades of both the combustion/exhaust
blower and convection blower. Periodically, the
blowers should be cleaned as the ash and dust can
impede performance. The convection blower is
accessed by opening the stove’s right side panel. The
combustion/exhaust blower can be accessed by
opening the left, right, and back panels located on the
pedestal. To clean the blades in the combustion
housing, insert the vacuum tip through the air inlet
damper opening located on the side of the combustion
housing. Clean thoroughly. To clean the blades in the
exhaust housing, use a screw driver to remove the
cleaning access panel located on the side of the metal
box covering the housing. Insert the vacuum tip
through the cleaning outlet and clean the blades
thoroughly.
NOTE: When cleaning, be careful not to bend fan blades.
Some stove owners lightly spray an anti-creosote chemical on
the fire to help reduce creosote formation within the stove.
LEFT SIDE PANEL
OF COMBUSTION
CHAMBER
BAFFLE
ACCESS TO
CLEANING OUTLET
SIDE DOOR
BOTTOM LEFT
SIDE PANEL
ACCESS PANEL TO
EXHAUST BLOWER
ACCESS PANEL GASKET
HIGH TEMPERATURE
L-250 MANUAL RESET
CONVECTION
BLOWER
THERMOSTAT
TERMINAL
POWER
CORD
AIR SUPPLY
KNOB
COMBUSTION
HOUSING
EXHAUST
HOUSING
HIGH TEMPERATURE
SWITCH F-140
CLEANING
ACCESS PANEL
COMBUSTION/EXHAUST
BLOWER MOTOR
EXHAUST
IGNITER
PRESSURE
SWITCH
AUGER
MOTOR
Oiling – both the convection and combustion/exhaust blowers have sleeve
bearings that are permanently sealed. No oiling is required.
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FIGURE 22
Access to cleaning outlet #1
FIGURE 23
Access to cleaning outlet #2
FIGURE 24
Rear view

CHIMNEY CLEANING
a. Creosote Formation – When any wood is burned slowly, it produces tar and other organic vapors, which combine with expelled
moisture to form creosote. The creosote vapors condense in the relatively cool chimney flue or a newly started fire or from a slow-
burning fire. As a result, creosote residue accumulates on the flue lining. When ignited, this creosote makes an extremely hot fire,
which may damage the chimney or even destroy the house. Despite their high efficiency, pellet stoves can accumulate creosote under
certain conditions.
b. Fly Ash – This accumulates in the horizontal portion of an exhaust run. Though noncombustible, it may impede the normal exhaust
flow. It should therefore be periodically removed.
c. Inspection and Removal – The chimney connector and chimney should be inspected annually or per ton to determine if a creosote or
fly ash build-up has occurred. If creosote has accumulated, it should be removed to reduce the risk of a chimney fire. Inspect the
system at the stove connection and at the chimney top. Cooler surfaces tend to build creosote deposits quicker, so it is important to
check the chimney from the top as well as from the bottom.
The creosote should be removed with a brush specifically designed for the type of chimney in use. A qualified chimney sweep can perform
this service. It is also recommended that before each heating season the entire system be professionally inspected, cleaned and, if
necessary, repaired.
To clean the chimney, detach the vent at the combustion blower transition where it is attached to the blower.
RECOMMENDED MAINTENANCE SCHEDULE
Use this as a guide under average-use conditions.
Daily Weekly/as needed Bi-Annually Annually or per Ton
Burn Pot Stirred Emptied/brushed
Glass Wiped Cleaned
Combustion Chamber Vacuumed Brushed
Ashes Emptied
Interior Chambers Vacuumed
Heat Exchange Tubes Cleaned (with rod)
Combustion/Exhaust
Blower Blades Vacuumed/Brushed
Convection Blower Blades Vacuumed
Vent System Cleaned/brushed
Gaskets Inspected
Hopper (end of season) Emptied and vacuumed
Gasket around door and door glass should be inspected and repaired or replaced when necessary (see “REPLACEMENT PARTS”).
REMOVAL AND REPLACEMENT OF BROKEN DOOR GLASS
While wearing leather gloves (or any other gloves suitable for handling broken glass), carefully remove any loose pieces of glass from the
doorframe. Dispose of all broken glass properly. Return the damaged door to your Osburn Dealer for repair or replacement. Neither the
appliance owner nor any other unauthorized person(s) should replace the door glass. An authorized Osburn dealer must perform all repairs
involving door glass.
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When your stove acts out of the ordinary, the first reaction is to call for help. This guide may save time and money by enabling you to solve
simple problems yourself. Problems can be caused by to only five factors: 1) poor fuel; 2) poor operation or maintenance; 3) poor
installation; 4) component failure; 5) factory defect. You can usually solve those problems related to 1 and 2. Your dealer can solve
problems relating to 3, 4 and 5. Refer to figures 26 - 29 to help locate indicated parts.
STOVE SHUTS OFF AND APPEARS ON CONTROL BOARD
Possible Causes: Possible Remedies: (Unplug stove first when possible)
1. Airflow pressure switch hose or pressure tab for hose are
blocked.
Unhook air hose from the airflow switch and blow through it. If air
flows freely, the hose and tube are fine. If air will not flow throw the
hose, use a thin wire to clear the blockage.
2. The air inlet, burn pot, 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.
3. Vent pipe is incorrectly installed. Check to make sure vent pipe installation meets criteria in owner’s
manual and pipe manufacturer.
4. The airflow pressure switch wire connections are faulty. Check the connectors that attach to the airflow pressure switch.
5. The airflow pressure switch wires are pulled loose at the
connector on the wiring harness.
Check to see if the wires are loose at the connector.
6. Combustion/exhaust blower failure. With the stove on, check to see if the combustion/exhaust blower is
running. If it is not, you will need to check for power going to the
combustion/exhaust blower. Current reading may vary. If there is
power, the blower is bad. If there is not, see #7.
7. Control board not sending power to combustion/exhaust
blower.
If there is no current going to the combustion blower, check all wire
connections. If all wires are properly connected, you have a bad
control board.
8. Control board not sending power to airflow pressure switch. There should be a 120-volt current going to the air switch after the
stove has been on. You will need a technician to perform this test.
9. Airflow pressure switch has failed (very rare). To test the airflow pressure switch, you will need to disconnect the
air hose from the body of the stove. With the other end still attached
to the switch, very gently suck on the loose end of the hose (you
may want to remove the hose entirely off the stove and the switch
first and make sure it is clear). If you hear a click, the switch is
working. BE CAREFUL TOO MUCH VACUUM CAN DAMAGE THE
SWITCH.
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STOVE SHUTS OFF AND APPEARS ON THE CONTROL BOARD
Possible Causes: Possible Remedies: (Unplug stove first when possible)
1. The hopper is out of pellets.
Refill the hopper.
2. The air damper is too far open for a low feed setting. If burning on the low setting, you may need to close the damper all
the way blowers have sleeve bearings that are permanently sealed.
3. The burn pot holes are blocked. Remove the burn pot and clean it thoroughly.
4. The air inlet, the interior chambers, or exhaust system has a
partial blockage.
Follow all cleaning procedures in the maintenance section of the
owner’s manual.
5. The auger motor has failed. Remove the auger motor from the auger shaft and try to run the
motor separately by pressing the fuel feed button on the control
board. If the motor turns, the shaft is jammed on something. If the
motor does not turn, the motor is bad or a connection with the
control board is faulty. To remove the auger motor, take off the top
and bottom panels at the back of the stove’s body. Loosen the two
screws holding the motor to the auger shaft. Then, remove the plate
located on the stove body, at the bottom of the gear motor, to allow
the motor to slide out of the stove body.
6. The auger shaft is jammed. Remove that auger shaft from the auger housing. Start by emptying
the hopper. Take off the top and bottom panels at the back of the
stove’s body. Then, remove the auger motor by removing the
screws holding the motor to the auger shaft. Remove the plate
located on the stove body, at the bottom of the gear motor, to allow
the motor to slide out of the stove body. Once, the motor is out,
remove the four screws on the steel plate holding the auger shaft to
the auger housing. Then, rotate the bottom end of the auger shaft
down towards you until you can pull the shaft down out of the stove.
After you have removed the shaft, inspect it for bent flights, burrs, or
broken welds. Remove any foreign material that might have caused
the jam. Also, check the auger housing for signs of damage such as
burrs, rough spots, or grooves cut into the metal that could have
caused a jam. Clean the auger housing thoroughly to remove all
pellet dust.
7. A fuse on the control board has blown. Remove the control board. Check if the F2 fuse on the back of it
appears to be bad. Replace it with a 7.5 Amp 250 Volt fuse. Plug
the stove back in and try to run the unit.
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