INSTALLATION AND OPERATION
FREESTANDING
PELLET FIRED
STOVES
RETAIN THESE
INSTRUCTIONS
FOR FUTURE
REFERENCE
These appliances must be properly installed and operated in order to
prevent the possibility of a house fire. Please read this entire owner's
manual before installing and using your pellet stove. Failure to follow
these instructions could result in property damage, bodily injury or even
death. Contact your local building or fire officials to obtain a permit and
information on any installation requirements and inspection requirements in your area.
MANUAL
Freestanding Model
T300P Series
P/N 775025M, Rev. E, 12/03
IMPORTANT WARNINGS
CAUTION: Read this manual thoroughly before starting installation. For your safety, follow the installation, operation and maintenance instructions exactly without deviation. Failure to follow these instructions may result
in a possible fire hazard and will void the warranty. If this appliance is not properly installed, a house fire may
result. Contact local building or fire officials about restrictions and installation inspection in your area.
1. DO NOT CONNECT THIS UNIT TO A CHIMNEY
FLUE CONNECTED TO ANOTHER APPLIANCE.
2. Do not connect this appliance to air ducts or any air
distribution system.
3. Do not install a flue damper in the exhaust venting
system of this appliance.
4. Do not use class B venting intended for gas appliances as a chimney or connector pipe on a pelletfired appliance.
5. The minimum clearances must be maintained for all
combustible surfaces and materials including; furniture, carpet, drapes, clothing, wood, papers, etc.
Do not store firewood within this clearance space.
6. INSTALLATION DISCLAIMER - This stoves exhaust
system works with negative combustion chamber
pressure and a slightly positive chimney pressure.
Therefore, it is imperative that the exhaust system
is gas tight and installed correctly. Since Lennox
Hearth Products has no control over the installation of your stove, Lennox Hearth Products grants
no warranty, implied or stated for the installation or
maintenance of your stove, and assumes no responsibility for any consequential damage(s).
7. Burning any kind of fuel consumes oxygen. If outside air is not ducted to the appliance, ensure that
there is an adequate source of fresh air available to
the room where the appliance is installed.
8. This stove is not intended for use in commercial
installations other than where the stove is being
sold without prior approval from Lennox Hearth
Products.
9. The stove will not operate using natural draft, nor
without a power source for the blower and fuel
feeding systems.
10. Never use gasoline, gasoline-type lantern fuel,
kerosene, charcoal lighter fluid, or similar liquids to
start or "freshen up" a fire in this heater. Keep all
such liquids well away from the heater while it is in
use.
11. CONTINUOUS OPERATION: When operated correctly, this appliance cannot be overfired. Continuous operation at a maximum burn can, however,
shorten the life of the electrical components (blowers, motors, and electronic controls), and is not
recommended. Typical approved operation would
include running at the low to mid range setting with
occasional running on the maximum setting during
the coldest periods of the winter. The blower speed
control should be turned to high when operating
the stove on the high heat setting.
12. CAUTION: NEVER PUT FINGERS NEAR AUGER.
Pellet fuel is fed to the UltraGrate by a screw auger. This auger is driven by a high torque motor.
The auger is capable of doing serious harm to fin-
Page 2
gers. Keep pellets in the hopper at all times and
keep fingers away from auger. The auger can start
and stop automatically at any time while the stove
is running.
13. CAUTION: HOT WHILE IN OPERATION. An appliance hot enough to warm your home can severely
burn anyone touching it. Keep children, clothing
and furniture away. Contact may cause skin burns.
Do not let children touch the appliance. Train them
to stay a safe distance from the unit.
14. APPROVED FUEL: This appliance is designed specifically for use only with pelletized wood fuels
only. With its advanced UltraGrate technology,
this appliance is designed and approved for the
burning of wood residue pellets with up to 3% ash
content. This appliance is NOT approved to burn
cardboard, nut hulls, cherry pits, corn, etc. regardless if it is in pellet form. Failure to comply with this
restriction will void all warranties and the safety
listing of the stove. Consult with your authorized
Lennox Hearth Products dealer for more information on approved pellet fuels.
15. FLY ASH BUILD-UP: For all wood pellet fuelburning heaters, the combustion gases will contain
small particles of fly ash. This will vary due to the
ash content of the fuel being burned. Over time, the
fly ash will collect in the exhaust venting system
and restrict the flow of the flue gases. The exhaust
venting system should be inspected regularly and
cleaned as necessary.
16. SOOT FORMATION Incomplete combustion, such
as occurs during startup, shutdown, or incorrect
operation of the room heater will lead to some soot
formation which will collect in the exhaust venting
system. A precautionary inspection on a regular
basis is advisable to determine the necessity of
cleaning. The exhaust venting system should be
inspected regularly and cleaned as necessary.
17. DISPOSING OF ASHES: Any ashes removed from
the pellet stove must be deposited in a metal container with a tight-fitting lid. The closed container of
ashes should be placed on a noncombustible floor
or on the ground, well away from all combustible
materials, outside of the dwelling pending final disposal. If the ashes are disposed of by burial in soil
or otherwise locally dispersed, they should be retained in the closed container until all cinders have
been thoroughly cooled.
18. SAVE THESE INSTRUCTIONS.
19. See the listing label on the stove body (or see
Safety / Listing Label, page 38).
TABLE OF CONTENTS
Important Warnings ................................................ 2
Testing / Listing, EPA, Using this Manual................ 3
Planning Your Installation ..................................... 4-6
Manufactured (Mobile) Home Installation ................7
Installation .......................................................... 7-15
Care and Operation .......................................... 16-21
Routine Maintenance........................................ 22-25
Specifications..........................................................26
Definitions ...............................................................27
Wiring Diagram .......................................................28
Troubleshooting ................................................ 29-30
Replacement Parts List / Diagrams .................. 31-34
Optional Accessories ..............................................35
Installation Tips .......................................................36
Simple Operating Instructions.................................37
Safety / Listing Label...............................................38
Ownership Records ................................................39
LISTING / TESTING
Listing: The listing laboratory is ITS (Intertek Testing Services) and the listing mark is Warnock Hersey.
Testing: In accordance with the specifications and procedures listed in UL 1482 & ASTM E1509 for solid fuel room
heater, this appliance has been independently tested to UL,
ULC and CSA standards. UL 1482 states requirements for
installations as a freestanding room heater. The safety listing label is located on an inside hopper surface of the pellet
stove. Please read this safety label carefully. It contains
important information about installation and operation of
this appliance. This appliance is tested and listed for residential installation according to current national and local
building codes as:
• A Freestanding Room Heater
• A Manufactured (Mobile) Home Heater
EPA (Environmental Protection Agency)
Status: EPA Exempt - Pellet appliances that are designed with the combustion air supply exceeding the 35
to 1 (by weight) ratio are exempt from EPA regulations
and are “non-affected facilities.”
PRODUCT IS SUBJECT TO CHANGE WITHOUT NOTICE.
CONGRATULATIONS ON THE PURCHASE OF YOUR
NEW PELLET STOVE MANUFACTURED BY LENNOX
HEARTH PRODUCTS.
When you purchased your new pellet stove, you
joined the ranks of thousands of concerned individuals whose answer to their home heating needs
reflects their concern for aesthetics, efficiency and
our environment. We extend our continued support
to help you achieve the maximum benefit and enjoyment available from your new pellet stove.
It is our goal at Lennox Hearth Products to provide
you, our valued customer, with an appliance that will
ensure you years of trouble free warmth and pleasure.
Thank you for selecting a Lennox Hearth Products
stove as the answer to your home heating needs.
Sincerely,
All of us at Lennox Hearth Products
PACKAGING LIST
The assembled pellet stove models T300P SERIES, are
packaged with an accessory package which contains the
following:
One - Installation and Operation Instructions Manual
One - Warranty
One - Power cord
One - Grate scraper
One - Wall thermostat
One - 20’ roll of 18 gage thermostat wire
One - Trivet, black decorative (for stove top)
One - Damper rod
Four - Levelers, leg, ¼-20x 1”
USING THIS MANUAL
Please read and carefully follow all of the instructions
found in this manual. Please pay special attention to the
safety instructions provided in this manual. The homeowner’s Care and Operation Instructions included here
will assure you have many years of dependable and enjoyable service from your appliance.
Page 3
PLANNING YOUR INSTALLATION
QUESTIONS TO ASK LOCAL BUILDING OFFICIAL
A correct installation is critical and imperative for reducing fire hazards and perilous conditions that can arise
when wood pellet burning appliances are improperly
installed. The installer must follow all of the manufacturers’ instructions.
The installation of this appliance must conform to local
codes and applicable state and federal requirements.
Familiarity with these requirements before installation is
essential. Important considerations to discuss with local
building officials include:
1. Applicable codes (i.e. Uniform Mechanical Code,
State or Regional Codes)?
Electrical codes:
In USA, NEC, ANSI / NFPA 70-1987.
In Canada, CSA C22.1
Power Supply Requirements
must be plugged into a standard, 115 volt, 60 Hz
grounded electrical outlet. The approximate
power requirement is 200 watts, and will peak up
to 700 watts for approximately 6 minutes when
the self-igniter is operating (it will turn off 2 minutes after flame detection). The power supply
cord must be routed to avoid contact with any of
the hot or sharp exterior surface areas of the
stove. When installed in a manufactured (mobile)
home appliance must be electrically grounded to
the steel chassis (see page 7, Manufactured
(Mobile) Home Requirements for additional requirements). These requirements must be met
unless otherwise specified by state or local authorities.
WARNING - Electrical Grounding Instructions:
This appliance is equipped with a three-prong
(grounding) plug for your protection against
shock hazard and should be plugged directly
into a properly grounded three-prong receptacle. Do not cut or remove the grounding
prong from this plug.
2. Local amendments?
3. Is a permit required - cost?
You may wish to contact your insurance company
to ask if they require this.
4. Is outside combustion air required?
5. Rooms where the installation is not allowed?
– The power cord
INSTALLATION / MAINTENANCE STANDARDS
National Fire Protection Association – The primary
NFPA standard that refers to installation and maintenance of pellet appliances and venting is NFPA 211:
Chimneys, Fireplaces, Vents, and Solid Fuel appliances, Jan. 2000.
SELECTING A LOCATION
The design of your home and where you place your
stove will determine its value as a source of heat. A
wood stove depends primarily on air circulation (convection) to disperse its heat, and therefore, a central
location is often best. There are other practical considerations, which must be considered before a final selection of locations is made.
♦ Existing Chimneys
♦ Pellet Fuel Storage
♦ Aesthetic Considerations
♦ Roof Design (rafter locations & roof pitch)
♦ Room Traffic
♦ Proximity to Combustibles
♦ Electrical Wiring
The installation of this stove will require some research.
Once your options are determined, consult with your
local building department who will be able to give you
the necessary installation requirements for your area (Is
a building permit required, rooms where installation may
not be allowed, etc.).
WARNING: Check all local building and safety
codes before installation. The installation instructions and appropriate code requirements must be
followed exactly and without compromise. Alterations to the stove are not allowed. Do not connect
the stove to a chimney system serving another
stove, appliance, or any air distribution duct. Failure
to follow these instructions will void the manufacturers warranty.
SMOKE DETECTORS
Since there are always several potential sources of fire
in any home, we recommend installing smoke detectors. 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 code requires a smoke detector be
installed within the same room, you must follow the requirements of your local code. Check with your local
building department for requirements in your area.
Page 4
PLANNING YOUR INSTALLATION
FLOOR PROTECTION
This appliance requires noncombustible floor protection. If the floor protection is to be stone, tile, brick, etc., it must be mortared or grouted to form a continuous non-combustible surface. If a chimney connector extends horizontally over the floor,
the protection must cover the floor under the connector and at least 2" to either side.
A noncombustible floor protector must fully cover the area beneath the appliance and extend 6” to the front, 6” to the
sides, and up to 6" from the back as illustrated below.
*Note: When installed at clearances less than 6”, floor protection is only required to extend to the wall.
T300P SERIES
6"
(153mm}
* Up to 6"/153mm
minimum
6"
6"
(153mm}
(153mm}
Page 5
PLANNING YOUR INSTALLATION
Clearances to combustibles are determined from testing to applicable standards for allowable heat transfer.
The clearances allowed as shown here, do not take into account operation or serviceability requirements.
CLEARANCES
Standard residential or manufactured (mobile) home installation. These appliances require the following minimum
clearances to combustibles:
MINIMUM CLEARANCES TO COMBUSTIBLES
Model: T300P
Series
Clearance to
Combustibles
A - Sidewall to unit
B - Backwall to
unit
C - Sidewall to unit
Corner
D - Max. Depth of
Alcove
E - Flue to Wall 3” / 77 mm 3” / 77 mm
♦ Measured to outside projection of cast stove top
• Minimum Alcove Measurements: Height 48” / 1220 mm
Width 41” / 1042 mm
Minimum clearances specified may not allow for ease
of operation and maintenance (please take this into
account when planning the installation). If installed to
the minimum clearances, removal of the appliance may
be necessary for servicing.
Manufactured (Mobile) Home
or Residential Installation
Horizontal Flue –
Directly Through
Wall
inch / millimeter inch / millimeter
♦6” / 153 mm ♦6” / 153 mm
2” / 51 mm 9” / 229 mm
2” / 51 mm 2” / 51 mm
•18” / 458 mm •18” / 458 mm
Interior Vertical
Flue
Rear Wall or Alcove
Corner
Page 6
INSTALLATION
MANUFACTURED (MOBILE) HOME INSTALLATION
Model –T300P Series
In addition to the standard installation instructions, the
following instructions may be required by local, state or
federal building codes:
• Stove must be permanently bolted to the floor.
• An outside air inlet must be provided for combustion
and be unrestricted while unit is in use.
• Stove must be permanently electrically grounded to
the steel chassis of the home. The location selected
for ground attachment to the stove must be dedicated
for this purpose.
• See pages 10 through 15 for additional information on
venting requirements.
• Do not install appliance in a sleeping room.
• The structural integrity of the manufactured home
floor, walls, ceiling and roof must be maintained.
NOTE: The grounding of this product, at installation,
must comply with NFPA-70 standards, CSA C22.1 in
Canada, as well as any local codes.
Model - T300P SERIES
Floor
Bolt
MANUFACTURED (MOBILE) HOME EXHAUST VENT
PIPE INSTALLATION GUIDELINES
Use only listed type “PL” pellet vent pipe. Pipe should
extend at least 3 feet above the part of the roof through
which it passes. The top of the pipe should be at least 2
feet above the highest required elevation of any part of
the manufactured (mobile) home within 10 feet of the
pipe.
If the exhaust vent exits the manufactured (mobile)
home at a location other than the roof, and exits at a
point 7 feet or less above the ground level on which the
manufactured (mobile) home is position a guard or
method of enclosing the pipe shall be provided at the
point of exit for a height of up to 7 feet. The openings, if
any, in this guard shall not allow a 3/4” rod to pass
through. A 1/2” rod could pass through but should not
be able to touch the pipe when inserted through the
opening a distance of 4 inches.
Floor
Protector
Page 7
REMOVING APPLIANCE FROM PALLET
1. After removing the packaging from the stove, lift the
hopper lid, and remove all pre-packaged items that
were shipped in the hopper. Next, open the stove
door and remove all pre-packaged items.
2. Remove screws which secure legs to pallet.
INSTALLING LEG LEVELING BOLTS
The four leg leveling bolts (included in accessory package), are provided for leveling the stove if necessary.
To install, thread the bolts into the existing holes in the
bottom of each leg. Turn the leveling bolts to adjust for
correct height.
INSTALLATION CHECK LIST
It is strongly recommended that you have an authorized
Lennox Hearth Products dealer install your stove. If you
install your stove yourself, you should review your installation plan with your authorized Lennox Hearth
Products dealer.
Check list:
Check off each item as you proceed with the installation
process.
Read the ENTIRE stove installation section first.
Determine the appropriate measurements and loca-
tions for your installation.
Follow the general installation directions under
Stove Installation and the installation section appropriate to your stove.
Be sure to pre-fit all items before you install, fasten,
or set up the stove permanently.
Prior to lighting your stove:
Review the safety precaution section.
Review the pellet fuels section.
Review and follow the Operating Instructions.
Plug power cord connector into corresponding con-
nector on the back of appliance (see illustration on
page 9 showing connector locations).
After you have begun operation of your stove:
Review the routine cleaning / maintenance informa-
tion.
Enjoy the warmth from your new Lennox Hearth
Products pellet stove!
INSTALLATION
DAMPER ROD INSTALLATION
1. Locate rectangular cutout on bottom stove panel
behind ash pan.
2. Screw damper rod into threaded hole.
DAMPER ADJUSTMENT
The damper rod is located under the bottom plate, on
the right hand side of the stove, just behind the ash
pan. It is very important to preset your damper prior to
burning your pellet stove.
The damper plate contains nine notches spaced in 1/4”
increments that aid in positioning (see Fig. A).
Fig. A
For initial setup, push the damper all the way in (when
facing the front of the stove, “in” is to the left, and “out”
is to the right) and slowly pull back three notches (see
Fig. B).
Pulled Back
3 Notches
Fig. B
This setting should provide an adequate air to fuel ratio
for most installations.
Page 8
INSTALLATION
THERMOSTAT INSTALLATION:
NOTE: Always Disconnect Power Before Performing The Thermostat Installation.
A 24-volt wall thermostat and 20 feet of 18-gage thermostat wire is included in your stoves accessory package. It is recommended that the thermostat and thermostat wire be installed by an authorized Lennox
Hearth Products dealer.
Installation Steps:
1. Unplug stove power cord from the wall outlet.
2. Locate the thermostat terminal block (see illustration).
3. Loosen the two terminal screws on the terminal
block and remove the jumper.
4. Connect the two wires from your thermostat to the
terminals (one per terminal). Ensure that the purple
wires from the harness remain connected to the terminal block and tighten the terminal screws. Make
sure the wires are firmly connected to the thermostat.
5. Plug in the stove and you are ready to operate with
your thermostat!
IMPORTANT: IF THE WALL THERMOSTAT PROVIDED IS NOT USED, THE JUMPER IS REQUIRED
FOR THE STOVE TO OPERATE.
Terminal Block for Thermostat
Leave Jumper on, If Thermostat Is Not
Used
Model T300P Series
(viewed from stove back)
Remove Jumper if Thermostat Is
Jumper
To Be Used
Page 9
INSTALLATION
VENTING REQUIREMENTS
It is recommended that only an authorized dealer install
your pellet stove. The specified installation requirements
must be followed to ensure conformity with both the
safety listing of the appliance and local building codes. All
clearances, installation instructions and precautions
specified by the vent manufacturer must be followed.
Selecting a Location - Review the appliance clearance
requirements before installing the venting system (see
Clearances, page 6). Position the appliance far enough
away from walls to allow adequate room for servicing.
Choose the appliance location with the least amount of
interference with the house framing, plumbing, wiring,
etc.
Preferred Vent Configuration – For the best performance, we recommend a vent run design which runs vertically and terminates above the roofline. This design will
allow natural draft to improve the flow of flue gases and
will aid in combustion and stove performance.
Type of Pipe – This stove requires type “PL” (pellet vent
pipe, sometimes referred to as “L-Vent pellet vent”),
which conforms to UL standard 641. Connect the pellet
vent pipe or the “tee” to the flue collar using a minimum of
three screws and seal as specified in “Pipe Joint Requirements” on this page. Do not use class B gas chimney
or single wall chimney as a substitute.
Size of Pipe -These pellet appliances are approved for
use with the following vent sizes: 3” (75mm) standard, or
4” (100mm). See page 12 for determining correct size
vent to use. Use a 3” (75mm) to 4” (100mm) adapter
(Cat. No. 14M81) or a 3” (75mm) to 4” (100mm) “tee” in
order to run 4” (100mm) pipe.
Offsets - In every installation, a single or double cleanout “tee” is recommended for every ninety-degree offset
(this tee will help collect ash residue and will allow for
routine cleaning without the need to disconnect sections
of pipe).
Note: Offsets and horizontal runs accumulate fly ash and
soot which reduces the exhaust flow and performance of
the stove.
Total Offsets in venting system should not exceed 270°
total in direction change.
Horizontal Runs - The maximum total horizontal run
must not exceed 10 feet (3.1 meters).
Horizontal run of pipe requires 1/4” / 7 mm rise per foot.
Pipe Clearances / Requirements – See pipe manufacturers instructions for installation of venting components
and clearances. Follow pipe manufacturers installation
precautions for passing pipe through a combustible wall
or ceiling (i.e. use an approved thimble).
Notes:
All pellet vent pipe requires 3” (75mm) clearance from
outside of pipe unless otherwise specified by vent manufacturer.
A support bracket should be installed every 4’ (1.2m) of
pellet vent pipe on the exterior wall of the house unless
otherwise specified by vent manufacturer.
Pipe / Liner Joint Requirements - All pipe joints must
be secured with a minimum of 3 screws. ALL horizontal
joints must be sealed gas tight. Use RTV silicone with a
rating of at least 570° F (969° C), or Interam to provide a
complete seal at the flue collar and on all joints.
Connection to Masonry Chimney through a Wall - Be
sure to verify the construction of a masonry chimney, as it
may have combustible framing.
The use of single wall flex or rigid 24 gage stainless steel
pipe as a liner is approved.
Connection to an Existing Class A Chimney - A chimney adapter can be used to make the connection from 3”
/ 75mm or 4” / 100mm pellet vent pipe to existing UL
chimney system. Verify with the pipe manufacturer that
your pipe brands will interconnect. The use of single wall
flex or rigid pipe (24 gage stainless steel) as a liner is
approved.
Direct-Vent Installations (Horizontal): On all direct-vent
installations (short, horizontal runs with no vertical pipe);
care should be taken when choosing a location for terminating the vent. It is not recommended to directly vent the
exhaust on the prevailing wind side of the house. It is
recommended that when an appliance is vented directly
through a wall, a minimum of 8’ (2.5M) of vertical pipe
should be installed to create some natural draft. This will
reduce the possibility of smoke or odor entering the
dwelling during appliance shutdown or loss of power.
PAGE 10
INSTALLATION
A
A
VENT TERMINATION
Do not terminate vent in an enclosed or semi-enclosed
area such as: carports, garage, attic, crawl space, under
a deck, porch, narrow walkway, closely fenced area, or
any location that can build up a concentration of fumes
such as a stairwell, covered breezeway, etc.
Vent surfaces can get hot enough to cause burns if
touched. Adults should supervise children when they are
in the area of a hot stove. Non-combustible shielding or
guards may be required.
Termination Cap: The termination of the outside chimney of the pellet stove shall be located in accordance with
the following:
A. Higher than 3’ (.92M) above any forced air inlet (air
conditioner, etc.) located within 10’ (3M).
B. Not less than 4’ (1.2M) below, 4’ (1.2M) horizontally
from or 1’ (3.1M) above any gravity air inlet (door,
window, etc.) which flue gases could re-enter the
dwelling.
C. Not less than 2’ (.6M) from combustible materials
such as an adjacent buildings, fences, protruding
parts of the structure, roof overhang, plants and
shrubs, etc. and not less than 7’ (2.1M) above grade
when located adjacent to the public sidewalks (access). The final termination of the exhaust system
must be configured so that flue gases do not jeopardize the safety of people passing by, overheat combustible portions of nearby structures or enter the
dwelling.
D. Not less than 3’ (.92M) below an eave (maximum
overhang of 3’ (.92M) or any construction that projects more than 2” (51mm) from the plane of the wall.
E. The distance from the bottom of termination to grade
is 12” (305mm) minimum. This is conditional upon
plants and nature of grade surface: Be careful to
choose a location for the vent termination which does
not expose people or shrubs to high heat from the
exhaust gases. The exhaust gases are not hot
enough to ignite grass, plants and shrubs located in
the vicinity of the termination although they should be
a minimum of 3’ (.92M) away. The grade surface under the termination must not be a lawn.
F. Since sparks may escape from the exhaust pipe of
any stove, use caution when positioning the vent
pipe. Refer to pipe manufacturer’s instructions when
installing and terminating the exhaust. The vent pipe
should be horizontal and never run the pipe in a
downward direction (recommend a ¼” (7mm) rise
per foot horizontal).
Note: It is not recommended to terminate exhaust vent
on the prevailing wind side of the house.
Chimney Height Requirements
The vent termination height required is 12” minimum
above the roof penetration point as illustrated below (Ref.
National Standard, NFPA 7-4.1). Check with your local
building official for additional requirements for your area.
REQUIRES A
LISTED
TERMINATION
✸
CAP
12” MIN
TERMINATION MUST BE
T LEAST 12” (305mm)
BOVE THE HIGHEST
POINT WHERE IT PASSES THROUGH THE ROOF
SURFACE.
Manufactured (Mobile) Home
Chimney Height Requirements
The chimney must extend 3’ (.92M) above the level of
roof penetration and a minimum of 2’ (.61M) higher than
any roof surface within 10’ (3M) (see below). Check with
your local building officials for additional requirements for
your area.
REQUIRES A LISTED
TERMINATION CAP
✸
TOP OF FLUE MUST BE 2’
HIGHER THAN ANY PART OF
ROOF WITHIN 10’ HORIZONTAL
TOP OF FLUE MUST BE 3’
HIGHER THAN HIGHEST POINT
OF ROOF PENETRATION
To pass inspection in nearly any jurisdiction, the chimney
must meet both safety and exhaust flow requirements.
The (3’ by) 2’ by 10’ rule applies to both masonry and
factory built chimneys.
✸
Ref. NFPA 7 – 4.1.2, Vents installed with a listed cap
shall terminate in accordance with the terms of the cap’s
listings.
PAGE 11
INSTALLATION
r
DETERMINING SIZE OF PIPE TO INSTALL
To determine what diameter pipe to use in an installation (3” or 4”), first find the “equivalent pipe length” using the following guidelines, then plot this figure and the altitude on the chart.
Fill out the installation chart, and calculate your total equivalent pipe length. After you have the total equivalent pipe
length, use the Pipe Selection Chart below to determine if your installation requires 3” or 4” exhaust pipe
INSTALLATION CHART
Type of
Pipe
# of Elbows
or Feet of
pipe
Equivalent
Feet
Total
Equivalent
Feet
SAMPLE INSTALLATION CHART
Type of
Pipe
# of Elbows or
Equivalent
Feet
Feet of
pipe
90o Elbows x 5 Ft. (1.5M)
45o Elbows x 3 Ft. (1M)
Horizontal
Pipe
Vertical Pipe x .5 Ft.
x 1 Ft. (.3M)
(.15M)
A- 90 Degree Elbow E- 8’ Vertical Pipe
B- 1’ Horizontal Pipe F- 2’ Horizontal Pipe
C- 45 Degree Elbow G- 90 Degree Tee
D- Standoff Braces
H- Wall Thimble
90o Elbows /
Tee (A & G)
45 o
Elbows (C)
Horizontal
pipe (B & F)
Vertical pipe
(E)
Total = 20
PIPE SELECTION CHART
30
2 x 5 Ft. (1.5M) 10 (3M)
1 x 3 Ft. (1M) 3 (1M)
3 x 1 Ft. (.3M) 3 (1M)
8 x .5 Ft. (.15M) 4 (1.2M)
NOTE: All equivalent pipe styles shown to the right are
standard for all freestanding models.
20
4 “ Diameter Only
3 or 4”
10
Diamete
.
Total
Equivalent Feet
0
0 1 2 3 4 5 6 7 8 9 10
Equivalent Pipe Length (Feet)
Altitude x 1000 Feet
Page 12
INSTALLATION
INSTALLING YOUR PELLET STOVE
Standard Horizontal Exhaust Installation (Direct
Vent)
1. Locate the proper position for the listed type “PL”
wall thimble. Avoid cutting wall studs when installing
your pipe. Use a saber saw or keyhole saw to cut
the proper diameter hole through the wall to accommodate the wall thimble. Use extreme caution to
avoid cutting into power lines within the wall of the
home. The hole size will depend on the brand of
pellet vent that you are using. Install the wall thimble
in the hole.
ALL INTERLOCKING PIPE CONNECTIONS WITHIN THE ROOM MUST BE SEALED WITH RTV AND
SECURED WITH A MINIMUM OF 3 FASTENERS
PER CONNECTION.
2. Position the stove approximately 12” (.3M) from the
wall on the floor pad. Push listed type “PL” pipe
through wall thimble. Squeeze a bead of high temperature silicone (RTV) sealer around the end of the
machined portion of the 3” (75mm) pipe connector
on the back of the stove. Firmly push on a section of
listed type “PL” pipe until inner pipe liner pushes into
the bead of RTV sealer
3. Push the stove (with pipe attached) towards wall.
Pipe will go through the wall thimble. Do not position
the back of the stove closer than 1” (25mm) from the
wall.
NOTE: Greater back clearance will improve the serviceability of the stove.
4. Install listed type “PL” 45-degree elbow with rodent
screen or cap (optional) on outside end of pipe. The
rodent screen should be no less than 1/2” (13mm)
mesh and may clog with soot and ash if left unattended during the burn season.
NOTE: The end of the exhaust pipe must extend a
minimum of 12” (.3M) from the outside of the building.
5. If the installation includes a source of outside combustion air; cut a separate hole through the wall for
the fresh air tube. This tube should be 1-5/8” (42mm)
[min.] diameter, steel only. Connect outside air pipe
to air inlet on stove. This tube must be terminated
with a 90 degree elbow or hood.
NOTE: Combustion air may also be drawn from a
vented crawl space under the home. All joints for connector pipe are required to be fastened with at least
three screws. If vented horizontally, joints shall be made
gas-tight in a manner as specified above. Install vent at
clearances specified by the vent manufacturer.
Page 13
INSTALLATION
INSTALLATION CONFIGURATIONS – Standard Horizontal Installations
If you vent to the furthest wall, the vent pipe
must maintain a 3”
clearance parallel to the
other wall.
Note: Horizontal run of pipe requires 1/4” / 7 mm rise per foot.
Page 14
INSTALLATION
Installation Configurations / Standard Venting Options
This appliance may be connected to an existing flue or
by installing listed type “PL” vent pipe. If a liner is run all
the way to the top of the existing chimney, the existing
flue should be sealed with a steel plate. Start a vertical
run with a Tee at the back of the stove. Other options
are illustrated below. Note: See page 11 for Vent Termination Requirements.
Preferred Installation – Vertical Vent Through the Roof.
This venting configuration allows for the best stove
performance. The vertical pipe promotes natural draft
and with the chimney inside the dwelling, the flue
gases stay warm, thus rising at a consistent rate.
PAGE 15
CARE AND OPERATION
CONTROL BOARD OPERATION
Stove On / Off Button – This button will turn your
stove on or off while in Manual or Automatic mode (see
page 19 for details). The green on / off light at the top
of control board will indicate the on / off status.
Heat Output Button – The heat output button has
three selection settings, Low, Medium and High.
Pressing the button will scroll the red indicator lights
from Low to High. The button controls the pellet feed
and combustion airflow simultaneously. The control
board is preset to provide the optimum ratio of fuel and
air at each setting. Settings can be changed at any
time but will only take affect after the start-up cycle is
complete. Each press of the Heat Button will increase
the heat output, and will scroll to the lowest setting after reaching the maximum setting.
Blower – The blower button operates the room air
blower. This will change the flow of hot air into the
room. Three choices are available Low, Medium, and
High. When the Blower Button is pressed the yellow
indicator light will scroll to Low, Medium, or High.
NOTE: When running your stove on high heat output,
the control board will not allow you to select the low
blower speed. This is a safety precaution to protect
against overheating. Blower settings can be changed
at any time, but will only take affect after the start-up
cycle is complete.
Fault Mode – The control system automatically monitors the flame using a photoeye. If the stove runs out of
pellets the control board automatically goes into a
“fault” status. The control board will initiate the shut
down cycle and safely shut down the stove leaving it in
the “fault” mode. The on / off indicator light near the top
of the control board will flash rapidly when in this
mode. After refilling the hopper with pellets, press the
Start Button. If a thermostat is not being used the
stove will go into the start-up cycle. If a thermostat is
being used the stove will go into the start-up cycle if
the thermostat is in the demand mode. If the thermo-
stat is in the stand-by mode when the fault is cleared, the
stove will remain in the stand-by mode until it closes again.
NOTE – If the fuel feed trim or combustion air trim
needs to be adjusted, contact an authorized Lennox
Hearth Products Technician to calibrate internal software. It is recommended that the damper be used to
fine-tune your stove to your particular fuel and installation configuration (see Damper Adjustment on page 8
and Damper Adjustment Guideline on page 20).
POWER LED
(fault when
flashing)
HEAT LED
ON / OFF
START
HEAT SELECT
BUTTON
BLOWER
LED
BLOWER
SELECT
BUTTON
PAGE 16
CARE AND OPERATION
A
Note: The control board is equipped with an internal
memory which will recall the last setting and mode
the stove was in prior to loss of power. Because we
individually check each stove prior to packaging, one
of the two scenarios will appear when you first plug in
your stove.
1). The Green LED at the top of the control board will illuminate and the blowers will be running. This is a standard cool down mode and will last no longer than five
minutes. This happens during testing when the stove is
turned off (which initiates cool down mode) and then is
unplugged.
2). The Green LED at the top will illuminate and the red
and yellow LED’s will illuminate on the control board,
indicating that the stove is in the run mode. This happens during testing if the stove is unplugged without
first turning the control board off (the control board remembers its last setting, which was the run mode).
If your stove follows that described in number 2 above,
simply press the ON / OFF button once to turn the stove
off, this will initiate the cool down mode. The stove can be
restarted at any time during the cool down mode by pressing the ON / OFF button once.
Start-up Sequence of Events
1. Fault time delay is initiated (14 minutes 15 seconds).
2. Fuel feed rate of 100% for 1 minute 50 seconds (when
trim left at factory setting of 0) auger trim setting ranges
from 1:26 to 2:14 depending on -4 to +4 respectively.
3. Exhaust blower operation starts (medium range voltage).
4. Room air blower operation starts (medium range voltage).Power LED is activated (steady green).
6. Igniter operation activated (line voltage).
7. Photoeye looks for flame (flame dominance scheme).
8. * If needed second & third fuel dumps are available at
predetermined time deliveries (4 minutes & 6 minutes
after initial).
Flame Detection Sequence of Events - This is what
happens after flame has been detected.
Happens within the Start-up Time Delay sequence.
0 to 1 minute no fuel feed.
Flame settles.
Bed of embers built.
1 minute mark: Fuel Feed rate 20% for 4 minutes
15 seconds (1 second on / 4 seconds off).
2 minute mark: igniter turns OFF / room air blower =
panel setting.
5 minute 15 seconds mark: exhaust blower = panel
setting / LED indicator still active.
Start-up Time delay ends 14 minutes 15 seconds
after pushing the start button!
PHOTOEYE
PN LABEL
LOCATION
POWER
SELECT
MAIN
RNESS
H
FUSE
Page 17
CARE AND OPERATION
Combustion Voltage Trim Steps:
1. Push button “twice” for access voltage calibration
mode.
2. Identify the current calibration setting indicated by one
YELLOW LED bar.
3. Push the “HEAT” control button to adjust setting UP.
Each push raises the YELLOW LED bar & increases
voltage 5%.
4. Push the “BLOWER” control button to adjust setting
DOWN. Each push lowers YELLOW LED bar decreasing voltage 5%.
5. Push the calibration button once to lock in selected
results.
Fuel Delivery Rate
The feed rate switch manages the fuel delivery rate by
controlling the amount of time the auger motor will run as
follows:
Feed
Rate
Setting
Low = 1 on / 5.00
Med.= 1 on / 3.30
High = 1 on / 1.60
Auger Motor
ON / OFF
Time (seconds)
off
off
off
* Lb.’s per
hour fuel
delivery
1.5 Lb.’s /
hr.
2.5 Lb.’s /
hr.
3.8 Lb.’s /
hr.
♦ Approxi-
mate
BTU per
hour
fuel de-
livery
13,000
BTU / hr
21,000
BTU / hr
32,000
BTU / hr
* Feed rates are approximations only. Actual feed rate
will vary depending on size, quality and length of fuel
used and variations in line voltage.
♦ Estimated heat input based on fuel value of 8400 BTU
per lb. of fuel.
Burn
Time
(hours)
34
20
14
Your pellet stove can be operated in either manual or
automatic mode. The manual mode is used when operating without a thermostat. The automatic mode is
used when utilizing a wall thermostat. When utilizing
the thermostat capability the burn time can be extended
dramatically depending on thermostat setting. Note: It is
normal for some ash to build up on the inner glass surface at the lower burn settings.
Initial Start-Up / Empty Hopper or Feed Tube:
During an initial start-up, or in the case where the hopper has run out of fuel, it will be necessary to prime the
auger feed system. The control board is set to deliver
fuel for approximately 2 1/2 minutes during start-up,
which, with a fully primed auger tube, will provide the
appropriate amount of fuel for ignition.
When first starting your pellet stove, it will be necessary
to prime the auger tube. To prime the auger tube you
need to first fill the hopper with pellets, and press the
ON button on the control board. Wait approximately 2
1/2 minutes and turn the control OFF and then back ON
again. Wait an additional 2 1/2 minutes (if necessary)
and continue this process until fuel begins to fall into the
UltraGrate. Remember, different brand fuels feed at
different rates.
Once fuel starts to enter the UltraGrate, turn the stove
OFF and then back ON. The auger tube should now be
primed and the stove should deliver enough fuel for
proper ignition. It may be necessary to follow these procedures in the event that the hopper runs completely
out of fuel.
Page 18
CARE AND OPERATION
Manual Operation:
Pressing the stove ON / OFF switch initiates the start-up
cycle. The green ON / OFF light, near the top of the control board, will light up to indicate the “on” status. The fan
speeds and pellet feeds are fixed during this time to provide appropriate ignition. The Fast-Fire igniter system will
light the pellets feeding to the UltraGrate, after about 3
minutes. The start-up cycle is in effect for approximately 2
minutes after flame is detected in the UltraGrate. A
photoeye monitors the existence of flame. After the startup cycle your stove will be in the run mode. At this point
the stove will operate in the heat output and blower settings selected. These settings can be selected either during or after the start-up cycle. Pressing the stove ON /
OFF switch during the run mode will initiate the shut down
cycle. The ON / OFF indicator light will turn off. The pellets will stop feeding and the blowers will run at a fixed
speed for approximately 10 minutes. At this point your
stove is safely shut down and can ONLY be re-started by
pressing the stove ON / OFF switch again.
Automatic Operation:
Your stove is capable of running in an automatic mode
with the use of a wall thermostat. NOTE: For the thermostat to control the operation of the stove, the “on” status
must be active on the stove’s on / off switch. The thermostat will establish either a demand mode or a stand-by
mode. The thermostat should be set for the desired room
temperature. If the room temperature drops below the
level on the thermostat the stove will automatically begin
the start-up cycle, as explained above in the Manual Operation section. Once the start-up cycle is completed the
stove will operate in whatever heat and blower setting you
have selected. For best operation under thermostat control, the Medium or High settings recommended. When
the desired room temperature is reached, the stove will
automatically go into the shut down cycle. The pellet feed
will stop and the blowers will continue for a controlled time
allowing safe shut down of your stove. All lights will remain on when the thermostat is open. The heat and
blower settings can be changed at any time, but only take
affect during the run mode. When the temperature in the
room drops to the level set at the thermostat, the stove will
again begin the start-up cycle and resume automatic operation in the demand mode.
NOTE: If the stove on / off switch is pressed while the
thermostat is in the standby mode the stove will not restart
until the thermostat closes.
Lighting Procedure Without Igniter
Your pellet stove can be lit manually without using the
automatic igniter by following the procedure below. If
your stove is set up to run on a thermostat, the thermostat circuit needs to be closed (as if permanently in the
demand mode). The thermostat wires should be removed from the rear of the stove and replaced with the
jumper originally supplied with your stove. If a jumper is
not available the thermostat should be set to the highest
setting. This will keep the stove in the demand mode. If
your automatic ignition system should ever need troubleshooting, repair or replacement, please contact your
authorized Lennox Hearth Products dealer.
1. Press the ON switch on the control board.
2. Wait approximately 2 1/2 minutes while the pellets
prime the grate (the pellets will stop feeding automatically).
3. Place a small amount of an approved (non-volatile)
fire starter on top of the pellets in the grate, (see
your authorized Lennox Hearth Products dealer for
appropriate fire starting products). DO NOT USE
FLAMMABLE LIQUIDS TO START YOUR STOVE!
4. Light the “fire starter” with a match and close the
door.
5. The photoeye will detect that a flame is present and
will begin feeding pellets in approximately 2 minutes.
6. The control board will continue to go through the
normal start-up cycle and the flame should be well
established within 10 minutes from the time the ON
button was initially pressed. Remember – you are
now in manual mode and heat settings should be
selected to the desired room heat level.
Turning Off Your Stove
Press the stove on / off switch to initiate the shut down
cycle. The pellets will stop feeding and the blowers will
continue to run on a timed cycle. The stove will shut
down safely upon completion of the shut down cycle.
Page 19
CARE AND OPERATION
DAMPER OPERATION
The damper is a plate that helps control the amount of
airflow supplied for combustion. With the damper pushed
in all the way, the airflow is at its minimum. As the
damper is pulled out, more air is allowed to flow.
It will be necessary to monitor the appearance of the
flame during the first 4-8 bags of pellets. If your flame is
smoky red / orange with evidence of soot at the top of
the flame, you need more combustion air; pull the
damper out one notch and re-evaluate the appearance of
the flame. It may be necessary to continue this process,
moving the damper one notch at a time until proper combustion is attained (the flame should become yellow and
begin to “dance”). If the flame is “short” at the higher
burn rates, or if the pellets are burning up in the grate
before new pellets are fed into the fire, push the damper
in one notch and monitor the flame. Continue the process of moving the damper one notch at a time and evaluating the flame until proper flame appearance is
achieved.
Once the damper has been properly set, it should not
need adjusting unless you are changing the grade of pellet fuel, in which case the damper may need to adjusted.
DAMPER ADJUSTMENT GUIDELINE
Lack of Combustion Air: By opening the damper, this
will increase combustion air delivery. Symptoms of insufficient combustion air include; unburned fuel, lazy smoky
or red / orange flame, excessive ash or soot, excessive
buildup on glass.
Contributing factors:
• High Altitude – Lack of oxygen
• Restrictive Venting (elbows, horizontal runs,
cold external chimneys, etc.).
Note: Excessive amounts of fly ash built-up in the grate,
clinkers in the grate or leakage of air (if the grate is not
properly seated) will starve the fire for air. See Routine
Maintenance, pages 22-25 for information on cleaning
the stove.
• Dirty / Poor Quality Fuel.
Excessive Combustion Air: By closing the damper, this
will reduce combustion air delivery. Symptoms of excessive
air include; fuel burns too quickly (results in smoking or
smoldering pellets), white to yellow flame, etc. If the
damper is open too much, the burning pellets will lift off
the grate and fly up into the air much like popping corn
does.
Contributing factor:
Correct Combustion Air / Proper Burn Characteris-
tics: When the damper is correctly set, the burning pel-
lets should move (wiggle) around slightly and the flame
should be bright yellow.
AUTOMATIC SAFETY FEATURES
Power Outage:
During a power outage, the stove will shut down safely.
The stove will automatically restart when power is resumed. The solid state control board has an internal
memory that will retain heat output and blower speed
settings through voltage interruptions.
A small amount of smoke may leak from the top of
the window glass, the hopper and from the combustion air intake, if the stove is vented horizontally with
no vertical pipe. This will not persist for more than 3 to 5
minutes and will not be safety hazard. It may set off your
smoke alarm.
Note: If the area in which you live is prone to frequent
power outages, it is recommended that a minimum of 8
feet (2 ½ meters) of vertical vent pipe be included in a
freestanding installation to induce a natural draft in the
event of a power failure.
Overheating:
A high temperature disc (thermal switch) will automatically shut down the stove if it overheats. Allow up to 45
minutes cooling time before re-lighting. Keep enough
convection air going through stove to keep it cooling
properly, this will ensure long life of the stove. If the overheating continues, contact your authorized Lennox
Hearth Products dealer for more information.
• Venting system providing excessive draft.
Page 20
CARE AND OPERATION
FUEL REQUIREMENTS
Using the UltraGrate burn system, this appliance has
been designed to burn wood residue pellets with up to
3% ash content. Agricultural pellets (i.e…corn, alfalfa
etc.) are not permitted to be burned in the stove. Dirty
fuel will adversely affect the performance of the stove.
Caution: The use of unapproved, dirty, wet and / or high
salt content fuel will void the warranty!
Wood pellets manufactured to the Pellet Fuels Institute
(P.F.I.) certification standard are available in two grades,
standard and premium. The primary difference between
the two is the ash content of the pellets.
The P.F.I., specification for standard grade & premium
grade residential pellet fuel is as follows:
• CHLORIDES (Salt): Less than 300 p.p.m..
• BULK DENSITY: 40 lb. / cu. ft. minimum
• MOISTURE CONTENT: 8% maximum
• ASH CONTENT: < 3% maximum (standard
grade) < 1% maximum (premium grade)
• FINES: 0.5% maximum through a 1/8” screen
Pellet Feed / Pellet Size:
The pellet feed system is designed to handle a wide
range of pellet sizes up to a maximum of 5/16" diameter.
Different pellets may feed at considerably different rates.
You may notice a difference in the burn if you change
pellet fuel sizes. The longer the pellet, the slower it will
feed and vice versa. If the stove will not stay burning at
the minimum fuel feed setting, those particular pellets
may not be feeding fast enough. If this happens, reduce
the amount of combustion air by adjusting the damper.
See page 8 before adjusting the damper.
Long Burn Time:
When operated correctly, this appliance cannot be overfired. Continuous operation at a maximum burn can,
however, shorten the life of the electrical components
(blowers, motors, and electronic controls), and is not recommended. Typical approved operation would include
running at the low to mid range setting with occasional
running on the maximum setting during the coldest periods of the winter. The blower speed control should be
turned to high when operating the stove on the high heat
setting. A lower heat setting is recommended for overnight operation or when the room is vacated for long periods of time.
Note: See Fuel Delivery Rate on page 18 for burn times.
CLINKERING
Silica (or sand) in the fuel, along with other impurities,
can cause clinkering. A clinker is a hard mass of silica
formed in the burning process. Clinkering is a function of
the fuel, (not the stove), but adversely affects the performance of the stove by blocking off the air passages in
the grate. Even P.F.I. approved pellet fuel may tend to
clinker. A clinker can be removed from the UltraGrate
and placed in the ash pan with the use of the grate
scraper / ash pan tool furnished with your stove. See
Routine Maintenance, pages 22-25 for more information
on cleaning.
ASH
The frequency of removal of the ash and maintenance
performed on the stove is directly proportional to the ash
content of the fuel and the operation duration of your pellet stove. Low ash fuel may allow longer intervals between cleaning, however, a stove burning high ash fuel
may need to be cleaned as often as everyday.
PLEASE NOTE: Lennox Hearth Products has no control
over the manufacturing of pellet fuel and will not be held
responsible for poor stove performance or any damage
caused by inferior pellet fuels.
FUEL FEED RATES
Different brands of pellets will feed at varying rates due
to their size and density (length and diameter). This may
require a slight adjustment in the damper control (see
page 8) or the fuel feed trim to compensate (see Note on
page 16).
UltraGrate
Page 21
ROUTINE MAINTENANCE
* Inspect your stove or insert at minimum frequency stated until you establish a minimum frequency required for
your installation (frequency will vary depending upon fuel BTU value / ash content, usage, and misc. installation
variables).
ROUTINE CLEANING
Note: Stove will need to be shut off and cooled enough to
handle before routine cleaning is performed.
Always disconnect power before doing any routine cleaning.
The following areas need to be inspected and cleaned
during routine cleaning:
• UltraGrate (burn grate)
• Ash Slide Plate
• Ash Pan
• Heat Exchange Tubes
• Photoeye
• Exhaust Passages and Vent Pipe
• Gaskets
• Window Wash
• Rear Stove Compartment
UltraGrate (BURN GRATE)
The UltraGrate should be inspected periodically to assure that the air holes have not become clogged with ash
or clinkers. The UltraGrate can easily be cleaned with
the grate scraper / ash pan tool, or it can be removed for
cleaning. It is very important to monitor the ash build up
under the UltraGrate, as excessive amounts of ash will
block combustion air from entering the grate, causing
pellets to pile-up in the grate. The ash build-up under the
grate is easily dumped into the ash pan by pulling out the
ash slide weekly as shown below. The grate cleaning
procedure is the same for all models.
UltraGrate
ASH PAN
The ash pan will have to be emptied periodically, depending on amount of fuel consumed. The T300P Series
ash pan is pulled straight out using the black pull knob
located on the front of the ash pan (see following picture).
Ash Pan
* (Recommended Frequency of 2 days – 2 weeks)
ASH SLIDE PLATE
Ash that accumulates around the grate can be “dropped”
into the ash pan without opening the firebox door. Simply
pull open the ash release slide plate as shown in photo
using the grate scraper tool provided. Remove the ash
pan as shown. Note: Make sure to fully close the plates
when finished. Failure to close the ash release slide
plates completely may cause the fuel to burn poorly (due
to reduced airflow through the grate), which may then
cause pellets to “pile up” in the grate.
Ash Slide Plate
* (Recommended Frequency of 1 day – 2 weeks)
*(Recommended Frequency of 1 day – 2 weeks.)
Page 22
ROUTINE MAINTENANCE
e
-
r
PHOTOEYE
The photoeye is positioned to view the flame from the top
of the auger feed tube. It is located below the auger
cover and can be accessed from inside the hopper for
annual maintenance or replacement (if necessary).
Photoeye Access Inside Hopper
Using a 11/32"
nut driver remov
the 3 nuts to ac
cess photoeye
and filter.
Photoeye Cove
Plate.
* (Minimum frequency of 6 months to 1 year)
Annual Maintenance Procedure:
Clean Photoeye Lens:
1. To access photoeye, remove cast top by lifting off, then
remove the 3 nuts on the cover plate (see picture
above).
2. Lift off cover plate and turn over (the photoeye is attached to the inside surface of cover). Wipe away
any dust or debris from the photoeye lens (see following picture).
Clean Filter Lens:
1. With the photoeye cover plate removed, look inside
the opening. You will see an amber colored square
glass filter secured in place by a bracket and 2 nuts
(it is on the left when viewed while facing the front of
the stove). Using a 11/32" nut driver, remove the 2
nuts and lift off the bracket. Using your finger slide filter up and out.
2. Wipe away any dust or debris from filter, then reinstall filter, filter bracket and cover plate with photoeye.
IMPORTANT: When reinstalling photoeye and cover,
be careful not to bend bracket or damage wires. Pay
special attention in positioning wires away from photoeye (which could obstruct it from sensing light).
* (Minimum frequency of 4 weeks - 6 months)
EXHAUST PASSAGES AND VENT PIPE
Inspect frequently and clean when necessary. Fly ash
will accumulate at all bends in the exhaust system.
Note: Large amounts of fly ash build-up will create a lack
of combustion air. Removing the Tee cap on vertical installations will allow an inspection of the ash build-up in
the exhaust Tee and will help you to decide how frequently more extensive cleaning must be performed.
Rain Cap
Clean
Lens
Remove Filter and Wipe Clean
Filter
CAUTION: If the filter is not reinstalled, refractive
light in the room may result in a fault, thus shutting
down of the unit.
Page 23
Clean-Out Tee
ROUTINE MAINTENANCE
Clean-Out Tee w/ Cover Removed
Remove cover, then
remove ash
Tube Scraper
Use the hole in the handle of the grate scraper tool to
“grab” onto the rod
* (Minimum Frequency of 1-2 months)
HEAT EXCHANGER TUBES
ONLY CLEAN HEAT EXCHANGER TUBES AFTER
STOVE HAS COOLED DOWN. A rod is located above
the heat exchange baffle (inside of firebox) is used for
cleaning the tubes. After opening the firebox door, use
the hole in the handle of the grate scraper tool to “grab”
onto the rod (see pictures on this page). Using the grate
scraper tool, pull the rod up and out towards the opening
of the firebox. Continue pulling until the tube scraper
reaches the top of the firebox.
It may be easier to clean the tubes by first removing the
heat exchanger baffle. Loosen the two screws holding
the baffle in place (do not fully remove). The baffle contains keyhole slots allowing the screws to remain in place
while removing the baffle. The scraper can now be
pulled in a more horizontal manner, which allows the
scraper to move more freely.
Pull the rod up and out towards the opening of the firebox
* (Recommended Frequency of 2 days – 2 weeks)
Page 24
ROUTINE MAINTENANCE
DOOR ROPE GASKET
The condition of the rope gasket around the door and
windows should be checked periodically and replaced or
repaired if necessary. A one-inch strip of paper may be
used to perform a test of the integrity of the door seal.
Close the door on the paper in several different locations
and pull. It is normal to feel only a slight amount of friction. The door gasket does not need to be “tight” in all
areas, since a small amount of leakage is not hazardous
or detrimental to the performance of your stove.
Door Rope Gasket
(check seal at points indicated)
WINDOW WASH
Periodically insert a small piece of cardboard (a business card) between the window trim and the window.
Slide the card back & forth a few times to clear any dust
or fibers from the window wash gap. Open the door and
repeat from the other side of the glass.
Window Wash
* (Recommended Frequency of 1 year)
Checking Door Seal
Important Note: Paper should be no longer than a
dollar bill.
* (Recommended Frequency of 1 year)
* (Recommended Frequency of 1 year)
REAR STOVE COMPARTMENT
The rear stove compartment should be cleaned periodically (a minimum of once a year). DISCONNECT ELECTRICAL CORD PRIOR TO CLEANING STOVE. Any
household dust, pet hair or sawdust should be vacuumed or wiped out of the rear compartment of the
stove, room air blower, and Exhaust Blower (paying
special attention to vacuuming out the intakes of both
blowers). The electrical components should be wiped
clean.
MOTOR LUBRICATION
The blowers are permanently lubricated by the
manufacturer. Do not apply oil to any part of the
blower. Doing so may cause damage.
SMALL AREA PAINT TOUCH-UP (Model T300P only)
Using one small piece of 320 grit sand paper and lightly
sand the blemish so that the edges are “feathered” or
smooth to the touch between the painted and bare surfaces. Do not let the sand paper gum up with paint, as
this will cause scratches on the metal surface. If there
are any scratches, use 600 grit sandpaper instead. Mask
off surfaces you do not want painted. Paint lightly over
the bare surface first as this will act as an undercoat.
Then paint over a larger area in smooth even strokes to
blend.
Page 25
SPECIFICATIONS - Model T300P Series
Flue Size 3” / 76mm Rear
Width, Overall 28 3/4” / 730 mm
Depth, Overall 26 1/2” / 660 mm
Height 28 3/4” / 730 mm
Floor to Rear
Flue Center 8 3/4” / 222 mm
Facing Back of Unit,
Outside Edge of Left Leg
To Center of Rear
Flue Outlet 10 1/2” / 267 mm
Floor to Rear
Outside Air Inlet 10” / 254 mm
Facing Back of Unit
Outside Edge of Left Leg
To Center of Air Inlet 17 1/2” / 445 mm
Floor Protection + Front and Sides: 6”/152mm
Requirements Back: Up to 6” / 152mm
Standard Features Fastfire Self Igniter
Wall Thermostat
(wire included)
Hopper Capacity 50 lbs.
Burn time ♦ 14-34 hours
Fuse, Control Board 5 amp, 25 volt, 3AG*
Fuse, Igniter 6 amp, 125 volt*
Heat Input (Max.) ♦ 13,000-32,000 BTU / hr
Overall Efficiency 85%
Emissions ♦ 0.43 gram / hr (varies w/
size and type of fuel)
EPA exempt
Ship Weight 363 lbs.
Room Air Blower 150 CFM; 1.5 amps,
2175 rpm
Auger Motor 1 RPM; .4 amps
Exhaust Blower 95 CFM: 1.0 amps,
2880 rpm
Note: Dimensions shown are approximations only (+/- ¼”)
+ Non-combustible thermal rated floor protection must
be used when installed on carpet (see Floor Protection, page 5). When installed at clearances less
than 6”, the floor protector is only required to extend to the wall.
♦ Fuel delivery and burn times will vary depending
on size and type of fuel used. Estimated heat input based on fuel value of 8400 BTU per lb.
* Fuses are rated as fast blow.
Page 26
8 3/4”
10 1/2”
17 1/2”
BACK VIEW
28 3/4”
SIDE VIEW
26 1/2”
Face of door
opening to
23”
10 “
28 3/4”
DEFINITIONS
AIR WASH
To inhibit buildup of soot on the door glass, air is delivered to the glass through an air wash system located in
the doorframe surrounding the glass.
AUGER
It transfers the fuel down the burner tube into the burn
grate.
AUGER MOTOR
Drives the Auger. Motor specifications are: .4 Amp, 1 rpm
(revolutions per minute).
BLOWER, ROOM AIR (CONVECTION)
The blower function is to transfer the heat from the appliance to heat the room air.
BLOWER, EXHAUST (DRAFT INDUCER/COMBUSTION)
It has a radial impeller to deliver more air to the burn
grate. It pulls air into the burn grate by creating a negative pressure. This is done by extracting the exhaust
gases out of the firebox and pushing the exhaust downstream to the flue exit.
DISC, HIGH LIMIT (L250-30F, N / C)
There are 2 of these high limit discs on this model. If a
temperature reaches 250° F., the high limit auto reset will
“trip” and stop the flow of electricity to the auger motor.
The discs will not automatically reset until it has cooled
below 220° F).
Disc for Room Air Blower – This disc is located on
the Room Air Blower jacket and is designed to detect an overfire condition.
Disc for Combustion Air Inlet – This disc is located on the combustion air inlet and is designed to
detect reversed flow. If negative pressure in the
dwelling (i.e. An extremely tight house which may
not supply adequate combustion and ventilation air)
causes the exhaust to pull back from the combustion air inlet, the heat from the exhaust will result in
heat activation of this disc.
HOPPER
The hopper is where the pellets are stored.
HEAT OUTPUT BUTTON
This is the main power button, which controls power to
the feed system auger motor and exhaust blower. It has 3
feed rate settings, which controls the burn rate.
PHOTOEYE
The photoelectric eye that senses the flame, or lack of. It
is designed to signal the control board to discontinue
power to the auger motor if it flame is not sensed in the
UltraGrate.
PRESSURE SWITCH
A safety device used to shut off the feed system (auger
motor) if there is too much back pressure in venting system. Some possible causes are as follows:
♦ The venting system is obstructed.
♦ High altitude or other misc. environmental conditions
affecting exhaust flow.
♦ Improper venting system.
ULTRAGRATE (BURN GRATE)
This is where combustion occurs and may be referred to
as the "burn grate".
Page 27
WIRING DIAGRAM
Page 28
TROUBLESHOOTING (Qualified Technicians Only)
Unplug Appliance Before Performing Any Troubleshooting or Maintenance
PROBLEM CAUSE(S) SOLUTIONS
1. Fire burns with
a lazy orange
flame. Pellets
build up in the
grate and the
window gets
sooted up.
2. Fire goes out
or stove shuts
down automatically
3. Pellets will not
feed.
There is insufficient combustion air. Remove any clinkers or ash from the bottom of the grate that
might be obstructing the primary air holes.
Change to a better grade of fuel if necessary.
Check that the damper has been opened enough for the
amount of fuel feed.
Check that the heat exchange tubes are not coated with ash.
Clean internal exhaust ducts.
Check gasket seal around the door. Use a thin strip of paper,
1 in. wide. Open the door and close it on the paper strip. A
slight friction should be felt when the paper strip is pulled.
Repeat this process at various locations around the door
gasket. Replace the door gasket if necessary.
Check for blockage in the air inlet tube or exhaust pipe.
Clean as necessary.
Close ash slide plates.
Have your authorized Lennox Hearth Products dealer check
your Exhaust Blower.
The hopper is empty
Pellets are not feeding.
The high limit temperature switch
has tripped.
There is too much combustion air
for the amount of fuel.
Stove has run out of fuel.
The auger motor or circuit board
may be defective. The pressure
switch tap or hose may be blocked.
Back pressure in venting tripping
pressure switch.
Thermostat is in stand-by mode.
Thermostat wires disconnect.
High limit switch may have been
tripped.
Self-aligning bearing in auger motor
may be mis-aligned.
Refill hopper.
See Pellets will not feed (#3) below.
Allow stove to cool for 1 hour and re-light. If the stove has
been operating at a medium to high burn rate and the room
air blower has been turned down low then the fan should be
turned up higher. If this problem persists (particularly at
lower burn rates) then the high limit disc should be replaced
by your authorized Lennox Hearth Products dealer.
Adjust the damper to reduce combustion airflow.
Refill hopper.
Check to be sure that there is no blockage in the pressure
tap or hose. Have your authorized Lennox Hearth Products
dealer diagnose the problem and clean or replace any necessary parts.
If new installation check for excessive 90˚ bends, long horizontal runs or excessive vertical run of 3” pipe. Possibly
change to 4” pipe. If older installation check for excessive
ash accumulation in pipe or other obstructions. Clean out
pipe.
Check to see if thermostat is set to low or if sun is shining
directly on thermostat.
Re-install wires.
Allow stove to cool. Increase room air blower setting.
Gently tap the auger motor.
Page 29
TROUBLESHOOTING (Qualified Technicians Only)
Unplug Appliance Before Performing Any Troubleshooting or Maintenance
PROBLEM CAUSE(S) SOLUTIONS
4. Blowers will
not operate
when the start
switch is depressed.
5. There is soot
or fly ash in the
house.
6. Stove acts as if
a fire is present
when there is
not a fire in the
grate.
7. Stove will not
light.
8. Fault Photoeye not detecting flame.
There is no power to the stove.
There is no power to the control
board.
The window is being cleaned when
the stove is operating.
There is leakage at the joints between the exhaust blower, connection or exhaust pipe connections.
This will be evidenced by dust on
the impeller of the room air blower,
and in the heat exchanger area.
The vacuum cleaner is leaking.
Excessive sun light may be shining
directly into firebox from window.
The igniter element may have
failed.
There are not enough pellets in the
UltraGrate.
Stove has run out of fuel.
A disk has tripped / pressure
switch.
Check that the stove is plugged in to the wall outlet.
Check to see if your circuit breaker has tripped.
Check the wire connections on the high limit disc and
Control board.
Turn down the room air blower or turn off stove before
cleaning to prevent dispersion of ash and soot into the
room.
Seal up any leaks in the exhaust system with room temperature vulcanizing silicone sealer (RTV).
DO NOT use a standard household vacuum or “shop vac”
as the filters will leak the fine particles of ash. Clean the
stove with an approved ash vacuum ONLY.
Block excessive sunlight. Call your authorized Lennox
Hearth Products dealer if problem persists.
Check igniter element fuse in rear stove compartment.
Call your authorized Lennox Hearth Products dealer. See
alternate manual lighting procedure
Prime the feed system (see page 18, Initial Start
Up/Empty Hopper or Feed Tube).
Clean photoeye lens (see Clean Photoeye Lens on page
23.)
Check connection at control board following yellow wires
to all connectors.
Refill hopper.
Blower intake, exhaust passages and / or venting system
needs cleaning (follow routine and annual maintenance
procedures).
If this does not correct the problem contact your local authorized Lennox Hearth Products dealer.
Page 30
REPLACEMENT PARTS LIST
Door Parts & Body Components
Item # Part # Description
1 20953002 Door Assembly, Black Painted – Model T300P
1 20953012 Door Assembly, Black Enamel – Model T301P
1 20953052 Door Assembly, Green Enamel – Model T305P
1 20953082 Door Assembly, Sand Enamel – Model T308P
26M81 Gasket Kit, Door, 3/4” Rope (10' of 11547)
61057208 Gasket Kit, Glass (4’)
20M44 Cast Top, Black Painted – Model T300P
20M49 Cast Top, Black Enamel - Model T301P
20M54 Cast Top, Green Enamel – Model T305P
20M59 Cast Top, Sand Enamel – Model T308P
26M18 Hinge Pin Set
2 20950005 Handle Assembly, Door
20959999 Glass, Door (includes gasket)
3 20950205 Hopper Lid Assembly, Kit
20950091 Ash Pan Assembly
20751075 Leveler Legs, 2 pc. (for a complete set of 4 levelers, order 2 kits)
4 20950100 Rear Panel Assembly
20953006 Trivet, Black
Electrical Parts
Item # Part # Description
5 12046300 Auger Motor
6 16055150 Control Board
7 12050011 Exhaust Blower (combustion fan))
8 12146109 Room Air Blower (includes gasket and 4 nuts)
9 12147705 High Limit Disc, 250 DG (L250-30F, 60T21) Set of three
10 12150213 Igniter Probe, 380 W, 3.3 A
11 14750404 Photoeye Kit, Replacement (w/bracket) - (Serial #5493 and up)
12 12058820 Power Cord (52L17)
13 16050001 Pressure Switch
14 16050205 Thermostat, Wall, Honeywell (Thermostat Wire, P/N 16020204, is not included)
16020204 Wire, Thermostat, 20' coil - 18 gage
15 12050815 Wiring Harness
18150150 Fuse, Control Board, 5 amp, 250 volt, Fast blow, 12pk.
12055908 Fuse, Igniter, 6 amp, 125 volt, Fast blow, 12pk.
Firebox Parts
Item # Part # Description
16 20950155 Brick Clips (2 clips)
17 20950150 Firebrick Set
18 12051263 UltraGrate, Replacement
Page 31
REPLACEMENT PARTS LIST
Auger
Item # Part # Description
20 12041300 Collar & Screw Set, Auger (3pc.)
21 20950087 End Flange, Auger
22 61050003 End Plate Gasket, Auger (5pc.)
23 11756300 Shaft, Auger
Misc. Parts
Item # Part # Description
17150029 Damper Rod Assembly, Kit
24 20950110 Gasket, Quick Disconnect
25 20950014 Baffle, Heat Exchange
27
12121413 Knob, Ash Pan
26022H Touch Up Paint, Black (for enamel)
26021H Touch Up Paint, Green (for enamel)
26023H Touch Up Paint, Sand (for enamel)
12055500 Tool, Grate Scraper
Page 32
REPLACEMENT PARTS DIAGRAMS
1
2
3
6
7
5
9
10
11
12
4
8
Page 33
REPLACEMENT PARTS DIAGRAMS
13 18
23
14
15
16
24
20
21
25
27
22
17
Page 34
OPTIONAL ACCESSORIES
Note: Install and use accessories per instructions provided with the accessory kit.
Optional Accessories
Item # Catalog # Model # Description Notes
1 14M16 TT – G Trivet, Gold Plated Replaces Standard Cast Black Trivet
2 H0252 DLS – T30 Log Set 2 Piece
3 14M81 QDPC – 4 Quick Disconnect Pipe Connector, 4” Required if 4” Pipe is used
70K99 TSPK – B Touch-up Spray Paint Kit, Black Metallic Black 12oz Spray Can
1
2
3
Page 35
INSTALLATION TIPS
Page 36
SIMPLE OPERATING INSTRUCTIONS LABEL
Page 37
T300P PELLET STOVE SAFETY LABEL
Note that your serial number is printed on the safety label located on the back of the stove. Your stove’s serial number
is preceded by a “WH-”(Example WH-0000000).
Page 38
Dealer’s Name:
Dealer’s Address:
City: State: Zip Code:
Serial Number: Date of Purchase: Date Installed:
Notes:
SERVICE AND MAINTENANCE LOG
Service Service Service
Date Technician Description
Page 39
1110 West Taft Avenue
Orange, CA 92865
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