Nature's Comfort NC-40 User manual

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NC-40 Pellet Stove
Installation and Operation Manual
SAVE THESE INSTRUCTIONS
CAREFULLY READ THIS ENTIRE MANUAL BEFORE BEGINNING INSTALLATION OR OPERATION TO FULLY
UNDERSTAND THE REQUIREMENTS AND RESPONSIBILITIES OF OWNING THIS PELLET STOVE
Mobile Home Use:
This freestanding pellet unit is approved for mobile home installation with outside combustion air hook-up.
Please contact your dealer if you have any questions or warranty issues.
www.wood-heating-solutions.com
Revision 2013 - 2.1
Tested to ASTME1509-04 and ULC S627-00

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Table of Contents
Part I –Safety & General Information
Important Safety Information 3
Safety Warnings and Recommendations 3-4
Product Information and Specs 5
Pellet Quality 6
Part II –Installation
Floor Protection, Clearance To Combustibles, Alcove Clearances 6-7
Vent Termination Locations 7-8
Horizontal Vent Installation 8
Freestanding Interior Vertical Vent Installation 9
Freestanding Exterior Vertical Vent Installation 10
Existing Flue Options 12
Determining Equivalent Pipe Lengths 13
Fresh Air Intake Installation 13
Mobile Home Requirements 14
Electrical 15
Part III –Operation
Automatic Control Safety Features 16
Start Up Procedure, Controller Operation 16
Advance Controller Operation 17
Refueling The Unit 18
Adjusting Airflow, Power Outage, Smoke Or Fire 19
Part IV –Maintenance
Ash Removal 19
Disposal Of Ashes, Clinker Cleaning 20
Daily, Monthly and Weekly Cleaning 20
Glass, Gaskets, Carbon Removal 21
Annual Cleaning 21
Part List, Diagram 22-24
Troubleshooting 25
Warranty 26-27

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Part I - Safety Warnings
CAREFULLY READ AND UNDERSTAND THIS ENTIRE MANUAL
PLEASE READ THIS ENTIRE MANUAL BEFORE OPERATING THIS PELLET BURNING HEATER. FAILURE TO
FOLLOW THESE INSTRUCTIONS COULD RESULT IN PROPERTY DAMAGE, BODILY INJURY OR EVEN DEATH.
DO NOT USE ANY MAKESHIFT COMPROMISES DURING INSTALLATION. ALWAYS KEEP A FIRE
EXTINGUISHER NEARBY.
1. This appliance must be installed according to current national and local building codes.
2. Contact your local building or fire official to determine if a permit is needed and for any information on
installation restrictions and inspection requirements for your area.
3. To prevent the possibility of a fire, ensure that the appliance is properly installed by adhering to the installation
instructions. Ask your dealer to assist you in obtaining information with regards to your local building codes and
installation restrictions.
4. The stove’s exhaust system works with negative combustion chamber pressure and a slightly positive chimney
pressure. It is very important to ensure that the exhaust system be sealed and airtight.
5. Do not operate unit with hopper open. Lit must beshut and tightly secured.
6. Do not burn with insufficient combustion air. A periodic check is recommended to ensure proper combustion air is
getting to the combustion chamber. Setting the proper combustion air is achieved by adjusting the slider damper
located on the lower left side of the stove. The adjustment range of the damper must not be altered for any
reason. See also “Adjusting Airflow” later in this manual.
7. The ash pan and viewing door must be locked securely for proper and safe operation of the pellet stove. Do not
operate with front cover open. This will prevent smoke, fire, and fly ash from escaping. Maintain gaskets and
seals in good condition.
8. This appliance will not operate using natural draft or without power for the blowers.
9. Do not abuse the glass by striking or slamming the door. Do not attempt to operate the unit with broken glass. Do
not attempt to clean the glass while unit is hot. To clean the glass, follow the instructions in the maintenance
section.
10. Do not operate your stove if you smell smoke coming from it. Shut off the stove per the operation instructions
found later in this manual, monitor the stove, call your dealer and standby with a fire extinguisher. DO NOT
UNPLUG THE UNIT.
11. Do not keep any combustible or explosive items around the stove when it is operating.
12. Repair and servicing of your stove may only be done by a qualified technician. Disconnect the power cord before
performing any maintenance or repair only after properly shutting down stove and allowing to cool.
13. Turning the stove to "off" does not disconnect all power from the unit.
14. The stove will not operate during a power outage. If this occurs, check for smoke spillage and open a house
window if necessary. When power returns, turn the stove back on.
15. Notify your insurance company of your new stove.
16. Do not touch the surface of the unit while the stove is operating. The high temperature of the stove glass door
and venting pipe will cause burns.
17. The use of smoke and carbon monoxide detectors is highly recommended with any hearth product, including this
unit. If possible, install the smoke detector in a hallway adjacent to the room (to reduce the possibility of
occasional false activation from the heat produced by the stove). If your local codes require the smoke detectors
to be in the same room, you must follow those requirements. Check with your local building department for
requirements in your area.
18. The exhaust venting must be cleaned bi-annually or after every two tons of pellets. Venting pipe and air input
pipe must remain unblocked. Perform regular maintenance checks. (See maintenance section.)
If you have any questions with regard to your stove or any information in this manual, contact your dealer.

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Stove Specifications
The NC-40 Pellet stove is an advanced design that utilizes individual fresh air intake and venting pipes. Negative
pressure burning technology creates high efficiency burning with very little ash in the exhaust. The advanced smart
controller shuts off the unit automatically if operated incorrectly or if out of pellets.
Model
NC-40
Rated input BTU/h
43,500
Rating fuel consumption Lb/h
1.0 - 4.84 lb/h +/-5%
Heating area Feet²
~2000 (or more depending on insulation)
Rating voltage Volts
115
Rating frequency Hz
60
Rating power Watts/Amps
<＝150/4.5
Hopper Capacity pounds
55
Venting pipe diameter Inch
3
Air input pipe diameter Inch
2
Unit size (wide x depth x height) Inch
26.75 x 25.5 x 39
Stove Dimensions
Part II - INSTALLATION
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.
CAUTION: DO NOT CONNECT TO ANY AIR DISTRIBUTION DUCT OR SYSTEM.
WARNING: DO NOT INSTALL IN SLEEPING ROOM
NATURE’S COMFORT HAS NO CONTROL OVER THE INSTALLATION A STOVE AND GRANTS NO
WARRANTY IMPLIED OR STATED FOR THE INSTALLATION, MAINTENANCE OR PERFORMANCE A STOVE
AND THEREFORE ASSUMES NO RESPONSIBILITY FOR ANY CONSEQUENTIAL DAMAGE(S).

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It is recommended that the unit be secured into its position in order to avoid any displacement. Do not use makeshift
compromises during installation.
Floor Protection
This unit must be installed with floor protection of a non-combustible protective floor pad of a minimum 3/8” (10mm)
thickness material or a masonry hearth. Follow the next diagram for sizing.
Minimum Installation Clearance to Combustibles
Minimum clearances to combustible surfaces must be maintained. See diagrams below and on pages 11-16. Keep all
combustibles outside of these clearance areas. INSTALL VENTING AT CLEARANCES SPECIFIED BY THE VENT
MANUFACTURER. Clearances may only be reduced by means approved by the regulatory authority.
Alcove Clearances
Maximum Alcove depth: 36”. Minimum Alcove height: 57.5”Minimum Alcove Width: 41”
Vent Termination Locations

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NOTE: WHERE PASSAGE THROUGH A WALL OR PARTITION OF COMBUSTIBLE CONSTRUCTION IS DESIRED
THE INSTALLATION SHALL CONFORM TO CANADA /CSA-B365.
Be sure to maintain the structural integrity of your home when passing a vent through walls, ceilings, or roofs and use only
minimum 3” (or 4”, requires reducer) listed type “L” or “PL” pipe and fittings that must be in good condition and kept clean.
Horizontal Exhaust Vent Installation (See following figure)
NOTE! Venting joints may NOT be located in an attic, roof space, closet or similar concealed space, or floor or
ceiling.
1. Place your appliance in a location which meets the requirements of this manual and where it does not interfere with
the house framing, wiring, etc. Note: The stove cannot be used without foot screws installed for maintaining a 1” gap from
the floor to the bottom of the stove base. This is required to keep temperatures cool enough underneath the unit.
2. Install the non-combustible hearth pad. Temporarily place the stove approximately 15” (381 mm) away from the
interior wall.
3. Locate the center of the exhaust pipe of your unit. This point should then be extended to the interior wall of your
house. Once you have located the center point on the interior wall, cut the appropriate sized hole through the wall for
thimble being used.
4. Install wall thimble. Refer to manufacturer instructions that should come with the wall thimble purchased.
5. Install the appropriate length of exhaust vent pipe into the wall thimble. Consider step 11 when determining the
correct length of exhaust vent to purchase.
6. Install combustion air intake pipe. Be sure that the outside air intake vent has a proper cap on it to prevent rodents
from entering; also be sure it is installed where it won’t become blocked with snow, etc.
7. Connect the exhaust vent pipe to the exhaust outlet of your appliance.
8. Secure all vent joint connections with 3 screws. Seal the exhaust vent joint connections with high temperature
silicone sealant.
9. Push the unit straight back to the interior wall but make sure to maintain the minimum clearances to combustibles –7.5”
(152 mm) to the back of the unit. Seal the annular space of the wall thimble and around the vent pipe with high
temperature silicone sealant.
10. The exhaust vent pipe must extend at least 12” (300 mm) out past the exterior wall and the vent exit also be a
minimum of 12” higher than the top of the stove for a draft to be created if power is lost while burning to reduce the
chance of smoke exiting the stove in the home. Seal the annular space of the wall thimble and around the vent pipe with

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high temperature silicone sealant.
11. Install a T with cleanout and appropriate length of vertical venting with supports. A listed vertical vent cap is
recommended however (if local codes allow) when the vent terminates several feet above ground level and there are no
trees, plants, etc. within several feet, a 90° and 45° elbow can be used as a termination. The 45° elbow must be turned
down to prevent rain from entering and also have a screen with ¼” holes.
Freestanding Interior Vertical Installation (See following figure)
NOTE! Venting joints may not be located in an attic, roof space, closet or similar concealed space, or floor or
ceiling.
1. Choose the location for your pellet stove, see item 1 of the Horizontal Exhaust Vent Installation (previous page) for
help in determining the correct location.
2. Note: The stove cannot be used without foot screws installed for maintaining a 1” gap from the floor to the bottom of
the stove base. This is required to keep temperatures cool enough underneath the unit.
3. Install the non-combustible hearth pad in a location so when the stove is placed it will leave the exhaust vent with a
minimum of 3” (75 mm) clearance to any combustible wall.
4. For installing the air intake, locate the center of the combustion air intake pipe at the back of your unit. Line up the
center with the same spot on your exterior wall and cut the appropriate sized hole through the wall for pipe size being
used.
5. Secure all vent joint connections with 3 screws. Seal the exhaust vent joint connections with high temperature
silicone sealant.
6. Install the combustion air intake pipe.
7. Install a tee with a cleanout on the exhaust pipe found at the rear of your unit.
8. Install vent (use listed type only) upward through the ceiling. When you pass through the combustible framing ensure
that the appropriate ceiling firestop is used. You must maintain a minimum 3” (75 mm) clearance to combustibles and
keep any insulation away from the exhaust vent.
9. Extend the exhaust vent through the roof flashing and ensure that the vertical cap is at least 36” (900 mm) above the
roof.

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Freestanding Exterior Vertical Installation (See following figure)
NOTE! Venting joints may not be located in an attic, roof space, closet or similar concealed space, or floor or
ceiling.
1. Follow steps 1 –5 from previous page.
2. Locate the center of the exhaust pipe, at the back of the unit. Line up the center with the same spot on the exterior
wall and cut the appropriate sized hole through the wall for thimble being used.
3. Install the wall thimble (refer to the instructions which come with the wall thimble for this step).
4. Install a listed exhaust vent through the wall; make sure that 3” (75mm) clearances to combustibles are maintained.
5. For installing the air intake, locate the center of the combustion air intake pipe at the back of your unit. Line up the
center with the same spot on your exterior wall and cut the appropriate sized hole through the wall for pipe size being
used.
6. Secure all vent joint connections with 3 screws. Seal the exhaust vent joint connections with high temperature
silicone sealant.
7. Install a “T” with a cleanout on the end of the exhaust pipe, then install listed venting upward. Be sure to install
support brackets every 5’ (1500 mm) to keep the venting straight and secure.
8. Extend the exhaust vent through the roof flashing and ensure that the vertical cap is at least 36” (900 mm) above the
roof.

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Typical Exhaust Termination Configurations
A- 90 Deg. Elbow
B- 12” Pipe
C- 45 Degree Elbow
D- Standoff Braces
E- 36” Pipe
F- 18” Pipe
G- 90 Degree Tee
H- Wall Thimble

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MAKE SURE TO INSTALL VENT PIPING AT CLEARANCES SPECIFIED BY THE VENT MANUFACTURER.
Existing Flue Exhaust Options (See following figures)
The pellet stove may also be connected to an existing unused flue. Wherever new vent pipe enters or exits an existing
chimney or flue it should be secured with a connector or steel plate and sealed with high temperature silicone sealant.
Start a vertical run with a tee at the back of the stove. Other options are illustrated below.

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Determining Equivalent Pipe Lengths
Below is a chart for determining equivalent feet to stay within a maximum limit of 15 equivalent feet that must be
observed for an installation.
Type of Pipe
# of Elbows or
Feet of pipe
Equivalent Feet
Total Equivalent
Feet
90
Elbows
5(1.5m)
45
Elbows
3(1m)
Horizontal
Pipe
1(.3m)
Vertical
Pipe
1(.3m)
Fresh Air Intake Installation (required for all installations)
An outside fresh intake air supply must be installed for safety and optimal performance. A listed and approved fresh air
intake kit must be used for the outside air intake installation. Canadian Users: A damper must also be installed in line
with the fresh air intake kit.
PVC pipe is not approved and may never be used.
Items required for a fresh air intake kit:
-A screen with holes no smaller than ¼” must cover the intake to prevent debris and critters from entering and damaging
the unit.
-A wind hood (rain shield) over the termination of the outside air intake pipe or a 90-degree elbow or a bend away from
the prevailing winds to prevent wind from blowing in and increasing airflow.
-The outside air termination MUST be at least 1-foot away from the exhaust system termination.
-The outside air intake port on your NC-30 stove is 1-7/8” OD. The connecting pipe must fit over this.
-The outside air connection used MUST NOT restrict the amount of air flow available to your stove.
-The outside air connecting pipe must be as short and free of bends as possible and it must be 1-7/8” I.D. to fit over the
outside air port on the stove.

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Mobile Home Requirements
WARNING: USE OF OUTSIDE AIR IS MANDATORY WHEN INSTALLING THIS UNIT IN AN AIR TIGHT OR
MANUFACTURED/MOBILE HOME.
CAUTION: THE STRUCTURAL INTEGRITY OF THE MANUFACTURED HOME FLOOR, WALL, AND CEILING/ROOF
MUST BE MAINTIANED.
In addition to the details above, mobile home installations must meet the following requirements:
- The stove must be permanently attached to the floor. Remove the back cover, drill 2 holes through the rear of the
base and secure with bolts or screws. Keep foot screws installed.
- The stove must be electrically grounded to the steel chassis of the mobile home with 8 AWG copper wire using an
appropriate termination and a serrated or star washer to penetrate paint or protective coating to ensure proper
grounding.
- The vent must be a factory-built 3 or 4 inch listed type “L” or “PL” vent conforming to “CAN/ULC-S629, Standard For
650C Factory-Built Chimneys” and must extend a minimum of 36” above the roofline of the mobile home and must
be installed using a listed ceiling fire stop and rain cap.
- When moving your mobile home, all exterior venting must be removed while the home is being relocated. After
relocation, all venting must be reinstalled and securely fastened.
- All joints for connector pipe are required to be fastened with at least three screws and sealed with high temperature
silicone sealant. An effective vapor barrier must be maintained wherever a chimney or other component (e.g.
thimble) penetrates to the exterior of the home.
- CAUTION: OUTSIDE AIR IS MANDATORY FOR MOBILE HOME USE. ADEQUATE VENTILATION IS REQUIRED.
FAILURE TO KEEP STOVE VIEWING DOOR AND ASH PAN SECURELY CLOSED OR EXCESSIVE HOME
EXHAUST FAN OPERATION MAY CAUSE ROOM AIR STARVATION LEADING TO POSSIBLE AFFIXIATION.
ENSURE OUTSIDE AIR INTAKE STAYS FREE FROM BLOCKAGE SUCH AS ICE, LEAVES, ETC.
- Only specified components may be used with this stove. Do not use any components that are not specified for use
with this stove.
- Check with your local building officials as other codes may apply.

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Electrical
The use of a surge protector is recommended and thestove must be properly grounded. The electrical cord must plug
into a standard 115V, 15 or 20 amp, 60Hz electrical outlet. Do not run cord under the appliance, keep accessible and
clear of any hot surfaces or sharp edges. If the power cord should become damaged, a replacement power cord must be
purchased from the manufacturer or a qualified dealer. The stove’s maximum power requirement is 520 watts (4.5
amps).
Electrical figure of the power distribution box and components:

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Part III - Operation
Pellet Quality
This unit is designed to burn pellet wood fuel only. Do not use any other type of fuel as this will void any warranties stated
in this manual. THE USE OF CORDWOOD IS PROHIBTED BY LAW.
Pellet quality is important! The NC-40 pellet stove has been designed to burn wood pellets only which are usually 0.2-0.3
inches in diameter with a length of 0.5-1.5 inches. The moisture content must be 10% or lower and the ash content no
more than 2% (lower quality requires more frequent cleaning of the stove and should not be used for “weekly” mode on
the controller). Use proper care with pellet fuel. Do not moisten or crush the pellets as this will affect the efficiency and
dust will collect on the door glass. Store pellets outside of clearance to combustible requirements and space required for
re-fueling and ash removal and in a dry place.
Do not use any other type of fuel, as this will void any warranties stated in this manual. The performance of your pellet
stove is greatly affected by the type and quality of wood pellets being burned. As the heat output of various quality wood
pellets differs, so will the performance and heat output of the pellet stove.
CAUTION: It is important to select and use only pellets that are dry, stored in a dry, climate controlled environment and
free of dirt or any impurities such as high salt content. Dirty fuel will adversely affect the operation and performance of the
unit and will void the warranty.
The Pellet Fuel Institute (P.F.I.) has established standards for wood pellet manufacturers. We recommend the use of
pellets that meet or exceed these standards. Please use a recommended pellet type.
P.F.I. PELLET STANDARDS:
Fines (fine particles)......by weight: no more than 0.5% maximum through a 1/8” screen
Bulk Density..................40 pound per cubic foot minimum Siz e: 1⁄4” to 5/16” diameter 1⁄2 to 11⁄2” long maximum
Ash Content.................0.5% maximum (True premium grade)..................3% maximum (Standard grade)
Moisture Content..........8% maximum
Heat Content................approximately 7,500-9,000 BTU per pound
Automatic Control Safety Features
TheNC-40 has the following safety features:
A.Theexhaust blower will shut down once exhaust temperatures drop below 125°F (52°C).
B.The stove has a high temperature safety switch near the hopper. If the temperature reaches 200°F (92°C), the
controller will alarm and the auger will automatically stop. Once the blowers shut down, toggle the rear power switch to
reset after determining the reason for the alarm.
C. The auger motor will automatically stop if the hopper lid is opened (limit switch) or the combustion door or ash pan is
opened (vacuum switch will open) when the unit is running.
D. If the power goes out, the unit will stop running. When the power comes back on the stove will automatically run the
exhaust blower if the unit is still hot until it drops below 125°F (52 °C).
Start-Up Procedure
Please adhere to the following instructions carefully. Be sure the hopper is clean and free from foreign materials before
filling and that there is power at the electrical outlet that will be used (a surge protector is recommended).
Make sure the ash pan and glass door are properly tight (do not over-tighten) and that the burn pot and fireboard is in
place. Adjust to proper position if needed. Fill the hopper with pellets. Maximum capacity is 55lbs. If empty, place a small
amount of pellets into the burn pot by hand, making sure the pellets cover the igniter hole. Never attempt to support
pellets by use of a grate or any other method. DO NOT PLACE UNBURNED OR NEW PELLET FUEL IN ASH PAN. A

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fire in the ash pan may occur.
NEVER USE GASOLINE, GASOLINE TYPE LANTERN FUEL, KEROSENE, CHARCOAL LIGHTER FLUID, OR
SIMILAR LIQUIDS TO START OR FRESHEN UP A FIRE IN THE HEATER. KEEP ALL SUCH LIQUIDS WELL
AWAY FROM THE HEATER WHILE IT IS IN USE. DO NOT BURN GARBAGE OR FLAMMABLE LIQUIDS SUCH AS
GASOLINE, NAPHTHA OR ENGINE OIL.
HOT WHILE IN OPERATION! KEEP CHILDREN, CLOTHING AND FURNITURE AWAY FROM THE HEATER.
CONTACT MAY CAUSE SKIN BURNS. YOUNG CHILDREN SHOULD BE SUPERVISED WHEN THEY ARE IN THE
SAME ROOM AS THE STOVE.
Controller Operation
1. Plug in the electrical cord to a properly grounded 15A, 110VAC outlet.
2. Turn the rear switch on. The controller will display the welcome screen, then the default display.
3. Press and hold “set” to set the time & date
4. Press “Control Mode” to cycle to the mode desired:
a. “Manual” (constant heat output, adjustable level 1-5)
b. “Temperature” (maintain an adjustable temperature set point, idles @ level 1 and heats @ 5)
c. “Weekly” (4 programmable set points for each day of the week, idles @ level 1 and heats @ 5)
5. Pressing “On/Off” will start the “Ignite” phase. The exhaust blower will turn on which causes the vacuum switch to
close and the igniter also turns on. Pellets will fall into the burn pot shortly and ignite in 3-5 minutes.
6. Once the units gets up to temperature and the exhaust blower temperature sensor closes, the stove will switch to
“Heating” phase. The igniter will turn off and the room blower will turn on.
Bottom Status Icon Legend (in order of left-to-right):
Igniter On: Exhaust Blower Running: Auger Motor Running:
Room Blower Running: Vacuum Switch Closed: Hopper Lid Closed:
Advanced Controller Operation
Manual Mode
Adjust heat output level from 1-5 stalls (bars) by pressing the up and down arrows while on or off.
Temperature Mode
Adjust the temperature set point from 45 to 90 degrees by pressing the up and down arrows while on or off.
Weekly Mode
There are 4 different time sections for each day of the week with each section able to run the stove with variable
temperature set points or turn the stove off automatically. There is a minimum of 30 minutes allowed between all time
sections. For a set point change while running, the stove will shut down and re-start automatically 30 minutes later at the

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new programmed set point.
1. Press and hold “Set” to enter the programming menu, scroll to “weekly” and press “Set”. Programming will start
with Sunday.
2. Press “Set” and scroll up or down to adjust the start and end time, then the set point and “Yes” or “No” for
whether you want the stove to run during that time period (must begin with yes).
3. Press set to advance to the next time section and repeat the programming process.
4. Settings for one day may be copied to all other days of the week (scroll to the bottom, press “Set”, scroll to “All”
and press “Set”) or program each day individually for all 4 time slots for all 7 days.
In the default screen, press “Back” to see the current 4 “weekly” set points for the day.
Hold Temp
Pressing “Hold Temp” while in the “Heating”phase in “Weekly” mode will hold the current temperature set point and
ignore the weekly programming until pressed again or “On/Off” is pressed to shut the stove down.
Temporarily Override A Weekly Programmed Set point
You can override a programmed set point by pressing the up or down arrows to obtain a set point that the stove will run at
until the next programmed set point.
Fireoff (Shutdown)
If there is ever a problem with the stove, “ON/OFF is pressed to shutdown the stove or you cycle through the controls
modes and stay on “Weekly” for more than 5 seconds at a time of day where the stove is at a programmed time section
that is set for the stove to be off (all 28 program points by default are this way), the stove will enter a “fireoff” phase. This
will start a 30 minute shutdown in which the blower and exhaust fan will continue to run on high and the stove will cease
to feed pellets until the exhaust temperature has dropped below 125F to ensure there are no burning pellets left. The 30
minutes (time left is displayed) must expire before being allowed to run again in any mode.
You can override the “fireoff” phase by pressing “Hold” for 3 seconds. WARNING! Only perform this if the fire has
gone completely out (controller should read “OFF”). Doing so while there is still pellets burning or smoldering
will create smoke that may fill your home and possibly cause a fire.
If the fireoff phase was started by accident and you wish to keep the stove running and the pellets have not smoldered
out, press “ON/OFF” for the controller to be “ON”, then press “Hold” for 3 seconds to continue in “heating” mode.
Shutdown Timer

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Only available in Manual or Temperature mode, press “Shutdown Timer” repeatedly to adjust between a 1-7 hour delay
(pressing again after “7HR” will cancel the shutdown timer). The stove will automatically go into “Fireoff” mode and
shutdown after the time has expired.
Child Lock
Press the up & down arrows together for 3 seconds to lock and unlock the controller.
Diagnostic Mode (only when not running)
Press and hold “set” and scroll down to “Diagnostic” and press set and the diagnostic screen will be displayed. This will
allow each component (Igniter, Room Blower, Exhaust Blower, Auger Motor) to be run manually and show whether the
hopper lid and the vacuum switch are closed. Move the arrow to the component desired and press “set” to highlight it.
Press “Up” or “Down” to toggle the component on or off (a filled-in circle means on or closed). Adjusting the “Stalls” from
1-5 will cause a component to run at its programmed rate as if it were in heating mode.
NEVER TURN ON THE IGNITER (FIRE) WITHOUT THE EXHAUST BLOWER RUNNING AND THE DOOR AND ASH
PAN CLOSED OR IT CAN OVERHEAT. NEVER LEAVE THE CONTROLLER IN DIAGNOSTIC MODE.
NTC1 is the Exhaust Temperature Sensor, NTC2 is the High Temperature Sensor (80C is normal, 99C is alarm condition)
WARNING: TURNING THE STOVE OFF DOES NOT DISCONNECT ALL POWER FROM THE UNIT.
DO NOT TURN OFF THE UNIT BY DISCONNECTING THE ELECTRICAL POWER TO THE UNIT. THIS WILL
CAUSE THE UNIT TO MISS THE PROPER SHUTDOWN CYCLE, CAUSING THE RELEASE OF SMOKE INTO THE
HOUSE AND OVERHEATING OF THE STOVE.
Refueling the Unit
To refuel, open the hopper and add desired amount of pellets. The auger motor will automatically stop when the hopper
is opened. WARNING: The hopper lid and other surfaces may be hot. Be careful and wear hand protection. NEVER
place your hand near the auger while the stove is operating. Do not overload.
Adjusting Airflow
Due to different fuel densities and sizes, pellet feed rates may vary. This may require the air intake damper setting
(located where the intake air pipe meets the combustion chamber) to be adjusted. To increase airflow, pull on the tab
located on the left hinged panel and push in to decrease airflow. Increase airflow if the flame is orange and lazy, and
decrease airflow if pellet coals are “jumping” around or out of the burn pot. The adjustment range of the damper must
not be altered for any reason. Since Nature’s Comfort has no control over the quality of pellets that are used or
installation and heating demands, we assume no liability for your choice in wood pellets or the stove’s performance.
Store pellets at least 36” (1 m) away from the pellet stove in a dry place.
WARNING: DO NOT OVERFIRE THE STOVE. THIS MAY CAUSE SERIOUS DAMAGE TO YOUR STOVE AND VOID
YOUR WARRANTY. IT MAY ALSO CREATE A FIRE HAZARD IN YOUR HOME.

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IF ANY EXTERNAL PART OF THE UNIT BEGINS TO GLOW, YOU ARE OVERFIRING. IMMEDIATELY PRESS THE
POWER BUTON. DO NOT UNPLUG THE STOVE OR TURN OFF THE REAR POWER SWITCH. THE EXHAUST
BLOWER MUST CONTINUE TO RUN TO COOL THE UNIT DOWN.
Power Outage
-In the event of a power outage, the stove will have to be restarted.
-Important! Do not open the hopper lid or the door to the unit during power outage. If needed, open the closest outside
door and a window to eliminate the home’s natural draft.
-The use of a surge protector with your unit is highly recommended as power surges and failures can affect the operation
of any electrical appliance.
Smoke or fire outside of stove
If you see smoke coming out of your unit into the room, the stove is running and the power has not failed,
DO NOT UNPLUG THE CORD. DO NOT TURN OFF THE REAR SWITCH. DO NOT OPEN THE HOPPER OR DOOR
TO YOUR UNIT. Immediately press the on/off button to initiate the off cycle, open the nearest outside door and windows
and wait for all signs of smoke to clear (at least one hour, although the smoke should dissipate quickly once the door and
windows are opened). Stand by with a fire extinguisher just in case. If there is a soot or creosote fire, follow the above
instructions for shutting down the unit and extinguish fire if possible or call the fire department and get all persons out of
the house.
Part IV - Maintenance
MAINTENANCE MUST ONLY BE DONE WHEN THE STOVE IS COLD AND THE POWER IS OFF AND UNPLUGGED.
WARNING! Failure to keep the unit properly cleaned causes reduced airflow and may result in excessive gases
during the ignition phase which can suddenly explode.
Ash Removal
IMPORTANT: While the amount of ash generated by this unit is very small compared to log-burning woodstoves,
keeping the unit clean and free of ash is essential for safety and peak performance. Too much ash build-up can hamper
airflow and reduce the unit’s efficiency, also causing accelerated ash buildup and/or creosote. If the intake air damper
has to be opened all the way to get a good, clean burn in the burn pot, this indicates ash buildup must be cleaned as
noted below to restore proper airflow.
The rear side covers must be removed to access the exhaust blower box cleaning/inspection ports on either side for
cleaning out ash. Remove the side covers by removing the wing screws inside the pellet hopper.
Specific attention must also be given to cleaning ash buildup in the combustion chamber exit ports on the top-right and
top-left corners of the combustion chamber behind and on either side of the heat exchanger tubes.
Tools typically used for cleaning are brushes and a vacuum. You will need to use a long, narrow, flexible furnace brush
for cleaning hard-to-reach areas (available from Nature’s Comfort).
Ash buildup in the burn pot or the areas of the unit listed above can also cause an ignition cycle to time out if the
exhaust temperature sensor doesn’t close within 15 minutes after turning the unit “ON”. The control panel will
sound an alarm and the exhaust blower will shut off. If pellets had begun to smolder, they will continue to create
smoke that will fill the unit and possibly exit into the home.

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Disposal Of Ashes
Ashes should be placed in a metal container with a tight fitting lid and moved outdoors immediately. Other waste shall not
be placed in this container. The closed container of ashes should be placed on a non-combustible 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 dispensed, they should be retained in the closed container until all cinders have been thoroughly cooled.
The ash content of the fuel and operation of your stove will directly determine the frequency of cleaning. The use of high
ash fuels may result in the stove needing to be cleaned daily. A low ash fuel may allow longer intervals between cleaning.
Clinker Cleaning
Clinkers are silica (sand) or other impurities in the fuel that will form a hard mass during the burning process. This hard
mass will block the airflow through the burn pot and affect the performance of the stove. Any fuel, even approved types,
may tend to clinker. Check the burn pot daily to ensure that the holes are not blocked with clinkers, especially if using
“weekly” mode on the controller. If they become blocked, remove the burn pot (when the unit is cold) and clean/scrape
the clinkers out. Clean the holes with a small pointed object if required.
Soot and Creosote
Soot or creosote may accumulate when the stove is operated under incorrect conditions such as an extremely rich burn
(black tipped lazy orange flames). Do not operate the stove if the flame becomes dark or sooty or if the burn pot overfills
with pellets. Use a better quality pellet and/or clean the stove if soot or creosote develops or becomes a problem. Turn
the stove off and call your dealer to discuss your installation and the fuel you are using if needed. Check the venting
system at least twice a year for creosote buildup and clean to reduce the risk of a chimney fire if a layer of 3mm or more
is present.
Daily Cleaning
Remove material that has accumulated in the burn pot using a metal scraper and a poker for material that is clogging the
burn pot’s holes. Dispose of the scraped ashes from the burn pot and from inside the frame the burn pot sits on into the
ash pan to ensure proper air flow through the burn pot.
Clean the heat exchanger tubes. Operate the heat exchanger wiper rod back and forth 2-4 times (6” of travel) in order to
clean away any fly ash that may have collected on the heat exchanger tubes. To understand how this works, open the
viewing door and look up at the heat exchanger while operating the wiper bracket. (The air deflector plate can be easily
removed for better viewing and/or a more thorough cleaning with a brush.)
Weekly Cleaning
Clean the burn pot weekly. Shut the unit down and allow it to completely cool. Take out burn pot, remove ashes and clean
holes. Vacuum any ashes that have accumulated in box underneath burn pot. Empty the ash drawer. Anytime ashes are
removed from the stove they should be placed in a non-combustible container with an airtight lid and should always be
placed on a non-combustible surface or on the ground until completely cooled and free of hot cinders before being
disposed of.
Monthly Cleaning
Shut the unit down and allow it to completely cool down. Perform daily and weekly cleaning procedures. Thoroughly
clean all ash from all areas including but not limited to the combustion chamber, combustion gas exit ports on either side
of the heat exchanger tubes, the heat exchanger tube area, the air channel behind the combustion chamber, the exhaust
blower collection box and all venting.
Glass
Keep glass clean for better viewing and heat radiation. Once cool, clean the door glass and doorframe with a soft, wet
cloth and mild cleanser daily. Do not use abrasive cleaners or attempt to open the door and clean the glass while the
unit is in operation or if glass is hot. Use a soft cotton cloth and mild window cleaner, wood stove glass cleaner, or take a
damp paper towel and dip into the fly ash. This is a very mild abrasive and will not damage the glass. Surface scratches

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are acceptable and normal.
Do not abuse the glass by striking or slamming the door. If the glass becomes cracked in any area, the unit must be shut
down and the glass replaced. Do not attempt to operate the stove with broken glass. Replacement parts must be
purchased from your dealer or Nature’s Comfort. Nature’s Comfort is not liable for glass purchased independently.
To replace glass, refer to the viewing door parts list and diagram later in this manual for the following procedure:
1. Wear leather gloves (or any other gloves suitable for handling broken glass) and safety glasses. Carefully
remove any loose pieces of glass from the door frame. Open door and remove gasket by pulling firmly with
pliers.
2. Remove all fasteners that are under the gasket, take off gasket frame and glass retainers and remove remaining
glass pieces. Dispose of all broken glass properly.
3. Inspect door gasket and glass gaskets that are between door frame and glass. Replace if necessary.
4. Glass dimensions are: (1) 11” x 14” (280mm x 350mm) & (2) 5” x 14” (127mm x 350mm) high temperature
ceramic glass that is 0.177” (4.5mm) thick. Glass part numbers are: 5822-06-01 and 5822-06-02. DO NOT USE
SUBSTITUE MATERIALS FOR ANY PART OF THIS STOVE.
5. In the following order, install glass gaskets, glass, retainers and gasket frame. Secure with fasteners previously
removed. Do not over tighten as too much stress can crack glass.
6. Install door gasket with high temperature silicone sealant. Adjust hooks on door latches to ensure proper
sealing.
See viewing door detail later in this manual for the order in which the parts are to be re-installed after removing.
Gaskets
Check that the gasket is complete and in the correct position to seal properly. The rope gasket around the front door may
require replacing every two years. Install new rope gasket with high temperature silicone caulk/sealant.
IMPORTANT: IMPROPER GASKET MAINTENANCE, INCLUDING FAILURE TO REPLACE DAMAGED OR WORN
GASKETS CAN CAUSE AIR LEAKS RESULTING IN SMOKE LEAKAGE.
Carbon Removal
During normal operation carbon from the combustion of pellet fuel will tend to build up on the tip of the auger, on the wear
plate and sides of the burn pot, and at the end of the mouth of the feed tube. It is essential that this residue be removed to
ensure trouble free operation of the unit. To remove this carbon, simply scrape it off using the blade of a flat tipped
screwdriver or similar instrument.
Annual Cleaning
When not using the unit for a long period of time, it should be cleaned completely. Shut down stove and allow to cool.
Perform daily, weekly and monthly cleaning procedures. It is especially important to clean the convection blower, exhaust
blower, intake pipe, venting pipe and underneath the stove.
Vermiculite Board: Remove the side vermiculite fire boards first by lifting the clips off the top, lift slightly and pull the
bottom out of the holder and then slide down. The back piece can now also be removed. Clean with a brush and
re-install.
Blowers: Remove the convection and exhaust blowers and clean thoroughly with a brush. Place a few drops of bearing
oil on both ends of the blower bearings.
Auger: Empty the hopper of pellets and remove the bracket that holds the auger assembly in place. Clean the auger and
auger channel and drop chute.