Lennox Cascade, Merit Cascade Installation And Operation Manual
INSTALLATION AND OPERATION MANUAL
™
US
Portland
Free-Standing
Pellet Stove
Save These Instructions
For Future Reference
P/N 775,024M, Rev. D, 05/2009
Report No. 050-S-23-2
Pellet Stove
Model Cascade
A French manual is available upon request. Order P/N 775,024CF.
Ce manuel d’installation est disponible en francais, simplement en faire la demande. Numéro de la pièce
775,024CF.
This appliance must be properly installed and operated in order to prevent the possibility
of a house re. Please read this entire manual before installation and use of this pellet
fuel-burning room heater. Failure to follow these instructions could result in property
damage, bodily injury or even death. Contact your local building or re ofcials
to obtain a permit and information on any installation requirements and
inspection requirements in your area.
WARNINGS
• Hot! Do not touch! The glass and surfaces of this appliance will be
hot during operation and will retain heat for a while after shutting off
the appliance. Severe burns may result.
• Carefully supervise children in the same room as appliance.
• Lennox™ pellet-burning appliances are designed for use as a supplemental heater. They are not intended for continuous use as a primary
heat source.
®
IMPORTANT SAFETY AND WARNIING
INFORMATION
READ THIS MANUAL IN ITS ENTIRETY AND UNDERSTAND THESE RULES TO FOLLOW FOR SAFETY.
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause injury or property
damage. Refer to this manual. For assistance or
additional information consult a qualified installer,
service agency or the gas supplier.
WARNING
Do not attempt to alter or modify the construction of
the appliance or its components. Any modification
or alteration may void the warranty, certification
and listings of this unit.
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 pellet fired 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 combustibles
within this clearance space (see Clearances on Page 5).
6. INSTALLATION DISCLAIMER - This stove’s exhaust system works
with negative combustion chamber pressure and a slightly
positive chimney pressure. Therefore, it is imperative that
the exhaust system be 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. The appliance will not operate using natural draft, nor without
a power source for the blower and fuel feeding systems.
9. 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.
10. The authority having jurisdiction such as municipal building department, fire department, fire prevention bureau, etc
should be consulted before installation to determine the need
to obtain a permit.
2
11. APPROVED FUEL: This appliance is designed specifically
for use only with pelletized wood fuels only. This appliance
is designed and approved for the burning of wood residue
pellets with up to 2% 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 Lennox Hearth Products dealer
for more information on approved pellet fuels.
12. 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. DO NOT
OVER-FIRE THIS STOVE. Follow all instructions regarding
the proper use of this stove.
13.CAUTION: NEVER PUT FINGERS NEAR AUGER. This appliance
is equipped with a hopper lid switch, which is designed to stop
the auger when the hopper lid is opened. NEVER DISCONNECT
OR BYPASSED THIS SWITCH FOR ANY REASON. 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 causing serious
harm to fingers. 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.
14. CAUTION: HOT WHILE IN OPERATION. An appliance hot
enough to warm your home can severely burn anyone touching
it. Keep children, pets, 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 appliance.
15. Fly-ash BUILD-UP: For all wood pellet fuel-burning 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. DISPOSAL OF ASHES: Ashes should be placed in a metal
container with a tight-fitting lid. The closed container of ashes
should be placed on a noncombustible floor or on the ground, well
away from all combustible materials, pending final disposal. If
the ashes are disposed of by burial in soil or otherwise locally
dispersed, they should be retained in the closed container until
all cinders have been thoroughly cooled.
18. The instructions must be strictly adhered to. Do not use
makeshift methods or compromise in the installation.
19. Do not abuse the door glass by striking, slamming or similar
trauma. Do not operate the stove with the glass removed,
cracked or broken.
20. SAVE THESE INSTRUCTIONS.
21. See the listing label on the appliance.
CONGRATULATIONS!
When you purchased your new pellet stove, you joined the ranks of
thousands of 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.
Thank you for selecting a Lennox Hearth Products stove as the answer
to your supplemental home heating needs.
TABLE OF CONTENTS
Important Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
Packaging List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
Testing / Listing, EPA . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
Using this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
Planning Your Installation . . . . . . . . . . . . . . . . . . . . . . . Page 3
Selecting a Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
Floor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
Installation Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
Manufactured Home Installation . . . . . . . . . . . . . . . . . . Page 7
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
Damper Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
Venting Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
Care and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 19
Routine Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 25
Component Definitions . . . . . . . . . . . . . . . . . . . . . . . . . Page 26
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28
Replacement Parts List and Diagrams . . . . . . . . . . . . . . Page 29
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 32
Safety / Listing Label . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 33
Product Reference Information . . . . . . . . . . . . . . . . . . . Page 34
This installation and operation manual will help you obtain a safe, efficient, dependable installation for your appliance and vent system.
PLEASE READ AND UNDERSTAND THESE INSTRUCTIONS
BEFORE BEGINNING YOUR INSTALLATION
PACKAGING LIST
TESTING / LISTING
Listing: The listing laboratory is OMNI-Test Laboratories, Inc., Portland,
Oregon. The report number is 050-S-23-2 for model Cascade pellet
stove.
Testing: In accordance with the specifications and procedures
• Listed and tested to ASTM E1509 and ULC C1482 / ULC S627 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 Free-Standing Room Heater
• A Manufactured Home Heater
EPA (Environmental Protection Agency)
Status: EPA Exempt - Pellet appliances that are designed with the com-
bustion air supply exceeding the 35 to 1 (by weight) ratio are exempt
from EPA regulations and are “non-affected facilities.”
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.
PRODUCT IS SUBJECT TO CHANGE WITHOUT NOTICE
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.
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.
The assembled pellet stove model Cascade®, is packaged with an
accessory package which contains the following:
One - Installation and operation instructions manual
One - Warranty
One - Power cord
One - Grate scraper
One - 5/32" Allen wrench
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:
Applicable codes (i.e. Uniform Mechanical Code, State or Regional
1.
Codes).
Electrical codes:
In USA, NEC, ANSI/NFPA 70 – Latest Edition
In Canada, CSA C22.1 – Latest Edition
3
2. Local amendments
3. Is a permit required - cost. You may wish to contact your insurance
company to ask if they require this.
4. If outside combustion air is required
5. Rooms where the installation is not allowed
Power Supply Requirements
These requirements must be met unless otherwise specified by state or
local authorities.
Power Cord - The power cord must be plugged into a standard, 120
•
Volt, 60 Hz grounded electrical outlet with proper ground and polarity.
The power cord must be routed to avoid contact with any of the hot
or sharp exterior surface areas of the stove.
•
Power Supply - The approximate power requirement is 250 watts.
Manufactured Home Installations - When installed into a manufac-
•
tured home, the appliance must be electrically grounded to the steel
chassis of the manufactured home (see Page 7, Manufactured Home
Requirements).
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 threeprong receptacle. Do not cut or remove the grounding prong from this plug. Do not route power cord
under or in front of appliance.
Surge Protectors
A surge protector is recommended to ensure the stove’s electrical components are not damaged due to a surge in the electrical supply. Only
high quality protectors listed to UL1449 should be used - low quality
protectors do not provide the protection needed.
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 these appliances).
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.
• Existing Chimneys
• Pellet Fuel Storage
• Aesthetic Considerations
• Roof Design (rafter locations and roof pitch)
• Room Traffic
• Proximity to Combustibles
• Electrical Wiring
CAUTION
The body of these appliances are very heavy. The
use of a heavy duty escalara (stair step hand truck)
is recommended for lifting the appliance body.
NEGATIVE PRESSURE WARNING
This appliance is not designed to be operated in a negative pressure environment. In very airtight homes with large kitchen exhaust fans, furnace
cold air returns, fresh air exchange systems and any other air system in
close proximity to the heating appliance may create a negative pressure
in the same room as the heating appliance. This can create dangerous
condition, drawing combustion by-products into the home. Be sure your
home has adequate makeup air to eliminate negative pressures caused
by the above-mentioned sources. Outside air connected to the appliance
probably will not resolve such a problem as the stove is not the source
of negative pressure. Lennox Hearth Products accepts no liability for
damages resulting from negative pressures described here.
Ventilation Requirements - Provide adequate air for combustion. The fresh
air requirements of this appliance must be met within the space where it
will be installed. Ventilation is essential when using a solid-fuel-burning
heater. In well insulated and weather tight homes, it may inhibit the rate
the exhaust flows through the venting system (caused by a shortage of
air in the home). The lack of air is caused by many common household
appliances which exhaust air from the home (such as a furnace, heat
pump, air conditioner, clothes dryer, exhaust fans, fireplaces, and other
fuel burning appliances). Also, the combustion process of this heater
uses oxygen from inside the dwelling. If the available fresh air delivery
in the dwelling is insufficient to support the demands of these appliances, problems can result (i.e. excessive negative pressure will result
in performance problems. To correct this problem it may help to open
a window (preferably on the windward side of the house) or install an
outside combustion air duct to the appliance.
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 – Latest Edition: Chimneys, Fireplaces, Vents, and Solid
Fuel appliances.
SELECTING A LOCATION
The design of your home and where you place your stove will determine
its value as a source of heat. This type of appliance 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. Some
of which includes:
4
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
FLOOR PROTECTION
This appliance requires noncombustible floor protection (the hearth pad
or alternate floor protection material does not require a thermal rating).
A noncombustible floor protector must fully cover the area beneath the
appliance as illustrated in Figure 1.
If the floor protection is to be stone, tile, brick, etc., it must be mortared
or grouted to form a continuous noncombustible surface. In Canada, if a
chimney connector / venting extends horizontally over the floor, protection
must also cover the floor under the connector / venting and at least 2”
(51 mm) to either side (recommended but not required in the US). See
Clearances and Hearth Protection shown in Figure 1.
Up to * 6”(153mm)
minimum
Rear Wall or Alcove - Clearance to Combustibles
Combustible
6”
(153mm)
minimum
6” (153mm)
Floor Protector
*Note: When installed at clearances less than 6”, floor protection is only required
to extend to the wall. Refer to Page 4 for chimney/venting floor protection
requirements and recommendations.
minimum
6”
(153mm)
minimum
Figure 1 - Floor Protection Requirements
CLEARANCES
Standard residential or manufactured home installation. These appliances
require the following minimum clearances to combustibles.
MINIMUM CLEARANCES TO COMBUSTIBLE MATERIALS
NE PAS ENLEVER CETTE ÉTIQUETTE DÉGAGEMENT MINIMUM POUR LES
MATÉRIAUX COMBUSTIBLES
Freestanding Stove Installation / Installation Du Poêle Autonome
Manufactured (Mobile) Home Or Residential Installation / Installation Résidentielle
Ou Dans Une Maison réfabriquée (Mobile)
A - Sidewall to unit 4” / 102 mm
B - Backwall to unit 1” / 25 mm
C - Sidewall to unit Corner 1” / 25 mm
D - Max. Depth of Alcove
E - Flue to Wall
F - Ceiling Height above stove top 21-1/2” / 522 mm
u
· Alcove Measurements (see Figure 4): Height, Minimum – 49” (1245
mm), Width Minimum – 32” (813 mm), Depth Maximum – 24” (610 mm)
24” / 610 mm
u
3" / 76mm
v
v See vent manufacturer to verify clearances
Table 1
B
D
A
Combustible
Figure 2
Corner - Clearance to Combustibles
Combustible
C
Figure 3
Rear Wall or Alcove - Clearance to Combustibles
F
E*
E*
C
49”
Min.
A
Combustible
Combustible
IMPORTANT
•
Minimum clearances specified may not allow
for ease of operation and maintenance (please
take this in to account when planning the instal
lation). If installed to the minimum clearances,
removal of the appliance may be necessary for
servicing.
•
Recommended clearance zone from the front of the
appliance to combustibles is 4 feet minimum.
•
Clearances to combustibles for the appliance
can only be reduced by means approved by the
regulatory authority.
A
A
-
24”
Max.
32”
Min.
Figure 4
*Note: Refer to pipe Manufacturer's installation instructions for minimum
pipe clearances.
5
INSTALLATION TIPS
INSTALLATION TIPS
Select Your Installation Type
GOOD INSTALLATION *
Horizontal Installation
(Direct Vent - Outside Wall)
No natural draft. Wind
pressures may affect operation
REQUIRES 3”
DIAMETER STANDARD
BETTER INSTALLATION
Vertical and Horizontal Installation
(Up and Out)
Some natural draft aids venting. Wind
pressures may still affect operation
Natural draft improves operation and
VENTING TYPE
a: PL-Vent Pipe / Pellet Vent (w/stainless inner liner)
b: Stainless Steel flex liner may be used inside existing flue
or chimney (woodstove replacement applications)
CAUTION: Do not use Type B-Vent Pipe
MANUFACTURED
HOME
BEST INSTALLATION
Vertical Installation
(Straight Up)
negative effects from wind
CLEARANCES TO
COMBUSTIBLES
PL-VENT / PELLET PIPE
With listed termination kit. If
installation requires in excess of
11’ of pipe, it is recommended a
4” diameter pipe be used.
Requires outside air for com-
bustion. Use a galvanized or
stainless steel pipe for duct.
Minimum duct size 1-5/8” dia.
Ensure all clearances are maintained in accordance to instruc-
tions contained on product
safety label and in compliance
with pipe/venting requirements.
POWER SUPPLY
PLEASE REVIEW THIS ENTIRE
INSTALLATION AND OPERA-
TION MANUAL FOR ADDITIONAL
INSTRUCTIONS.
* In horizontal vent installations It is recommended that when an appliance is vented directly through a wall, a minimum of 6 feet (1.83 M) of vertical pipe is
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.
6
Must have proper polarity and
be grounded.
Note: Use of an extension
cord may adversely effect the
performance of your unit.
Seal All
Venting Joints:
Use RTV
(high temp silicone)
MANUFACTURED HOME INSTALLATION
In addition to the standard installation instructions, the following instructions may be required by local, state or federal building codes:
• Installation should be in accordance with the Manufactured Home and
Safety Standard (HUD), CFR 3280, Part 24.
• The stove must be permanently bolted to the floor using four 1/4" Lag
screws. The lag screws must be an adequate length to extend through
the hearth pad and into the floor as shown in Figure 5. Install the lag
screws as shown in Figure 5. A minimum of two lag screws must be
used.
•
Connecting the Cascade™ stove to outside combustion air is required
in manufactured home installations and when required by local building
codes. An outside air inlet must be provided for combustion and be
unrestricted while unit is in use. Use a galvanized or stainless steel
pipe for the duct (the outside air inlet on the stove is 1-5/8” diameter).
The air intake on the exterior of the home should always be located
a minimum of 18" below the flue termination. The Inlet shall remain
free of obstruction while unit is in operation and constructed in a
manner so as to prevent material from dropping into the inlet or into
the area beneath the dwelling. The inlet shall also have a screen with
openings not larger than 1/4" to prevent rodents from entering.
• Stove must be permanently electrically grounded to the steel chassis
of the manufactured home using a 8 GA copper wire and a serrated
or star washer (to penetrate paint or protective coating to ensure
grounding). The location selected for ground attachment to the stove
must be dedicated for this purpose. Grounding must comply with
NFPA-70-latest edition standards, CSA C22.1-latest edition in Canada,
as well as any local codes.
• See Pages 9 through 16
ments.
•
WARNING: DO NOT INSTALL THIS STOVE IN A SLEEPING ROOM IN
A MANUFACTURED HOME.
•
CAUTION: THE STRUCTURAL INTEGRITY OF THE MANUFACTURED
HOME FLOOR, WALLS, CEILING/ROOF MUST BE MAINTAINED.
for additional information on venting require-
Manufactured Home Exhaust Vent Pipe Installation Guidelines
This stove is approved for venting with Type L and Type PL pellet vent
pipe listed to UL 641 and ULC S609. We recommend the use of venting products manufactured by Security Chimneys International. The
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 home within
10 feet of the pipe (see Page 12, Manufactured Home Chimney Height
Requirements).
If the exhaust vent exits the manufactured 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 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.
INSTALLATION
Removing Appliance From Pallet
1. After removing the packaging from the stove, lift the hopper lid, and
remove any pre-packaged items that were shipped in the hopper. Also
open the door assembly and remove any pre-packaged items.
2. Using a 1/2" socket or open end wrench, remove the four nuts from
inside the stove legs that secure the stove to the pallet braces.
Figure 5
Bolt
Chassis
Floor
Protector
Floor
Grounded to Steel
Chassis
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
Figure 6
Front
Door Assembly
Back
Pallet
Bolt locations
Remove 4 nuts inside stove legs.
7
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 an authorized Lennox Hearth
Products dealer.
Check list:
Check off each item as you proceed with the installation process.
qRead the ENTIRE stove installation section first.
qDetermine the appropriate measurements and locations for your
installation.
qFollow the general installation directions under Installation.
qBe sure to pre-fit all items before you install, fasten, or set up the
stove permanently.
qMeasure for exhaust (also outside air tube when applicable) and mark
the location. Place the unit in place to make sure it's correct before
cutting holes in your wall.
Prior to lighting your appliance:
qReview the Important Warnings section (see Page 2).
qReview Fuel Specifications (see Page 19).
qReview and follow instructions in the Care and Operation Section (see
Pages 17 through 19
).
qPlug power cord connector into corresponding connector on the back
of appliance.
After you have begun operation of your appliance:
q Review the routine cleaning / maintenance information.
q Enjoy the warmth from your new Lennox Hearth Products pellet appli-
ance!
Damper Location and Adjustment
The damper is a plate that helps control the amount of airflow supplied
for combustion. With the damper pulled out all the way, the airflow is
at its maximum. As the damper is pushed in, the amount of air that is
allowed to flow is reduced.
It is very important to preset your damper prior to burning your pellet
stove. The damper rod is located on the right side of the stove as shown in
Figure 7
. The damper should be pulled all the way out to the full open
position during initial operation. It may need to be manually adjusted
inward depending on the type of pellet fuel being burned. Adjust in 1/4”
increments until optimum combustion air flow is achieved. The damper
control adjusts the amount of combustion air to the UltraGrate™. When
the damper has been correctly adjusted, you will observe a brisk, yellowto-whitish flame. Fuel should not “pile-up” in the grate. The proper air
settings will vary from stove to stove due to installation, altitude, and
the fuel being burned.
Initial Setting - Pull damper
out to the full open position,
then adjust in 1/4” increments
until optimum combustion air
flow is achieved.
Top View of Stove
Damper Rod
Front
Push in for less air
Pull out for more air
Figure 7 - Damper Control
It will be necessary to monitor the appearance of the flame during the first
4-8 bags of pellets. If the flame is smoky red or orange with evidence of
soot at the top of the flame, the damper will need to be adjusted to deliver
more combustion air (see Figure 7). If the flame is “short” at the higher
burn rates and appears to burn the pellets out of the UltraGrate™ faster
than they can be resupplied, or there are significant variations of flame
height within a single burn setting, the damper may need to be adjusted
to deliver less combustion air.
After the damper is adjusted, re-evaluate the appearance of the flame. It
may be necessary to continue adjusting the damper in increments until
proper combustion is achieved (the flame should become a brighter
yellow and begin to “dance”).
Once the damper has been properly set, and if the routine maintenance
is performed as needed, the damper should not require re-adjustment
unless you are changing from a premium grade pellet to a standard or
high ash pellet, in which case the damper may need to be moved outward
to help prevent the accumulation of ash in the UltraGrate™.
Damper Adjustment Guideline
Lack of Combustion Air: By opening the damper, this will increase com-
bustion air delivery. Symptoms of insufficient combustion air include;
unburned fuel, lazy smoky or red / orange flame, excessive ash or soot,
excessive buildup on glass, fuel may “pile-up.“
Contributing factors:
• High Altitude – Lack of oxygen
• Restrictive Venting (elbows, horizontal runs, cold external
chimneys, etc.).
• Dirty / Poor Quality Fuel.
• Lack of Maintenance
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, on Pages 20 through 24 for
information on cleaning requirements.
Excessive Combustion Air: Adjusting the damper to a more closed position will reduce the 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 far, the burning pellets
will lift off the grate and fly up into the air much like popping corn does.
Another flame characteristic of a damper that is open too far is a flame
that has significant variation in height on any single burn setting.
Note: Excessive combustion air reduces efficiency.
Contributing factor:
•· Venting system providing excessive draft.
• Dry, hot burning fuel
Correct Combustion Air / Proper Burn Characteristics: When the damper is
correctly set, the burning pellets should move (wiggle) around slightly and
the flame should be bright yellow and stay at relatively even height.
Outside Air Installations
Connecting the Cascade™ pellet stove to outside combustion air is
optional, except in manufactured (mobile) home installations and when
required by local building codes. The stove’s air intake will accept 1-5/8”
ID pipe to accommodate outside air installations. The air intake on the
exterior of the home should always be located a minimum of 18" below
the flue termination and must remain free of obstruction. The inlet must
also have a screen with openings not larger than 1/4" to prevent rodents
from entering.
8
VENTING REQUIREMENTS
It is recommended that only an Lennox Hearth Products 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.
Offsets
In every installation, a single or double clean-out “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).
Pipe Clearances/Requirements
Selecting a Location
Review the appliance clearance requirements before installing the
venting system (see Page 5). 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 roof line. 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 is approved for venting with Type L and Type PL pellet vent
pipe (sometimes referred to as “L-Vent pellet vent”, listed to UL 641 or
ULC S609). We recommend the use of venting products manufactured by
Security Chimneys International. Connect the pellet vent pipe or the “tee”
to the flue collar using a minimum of three screws and seal as specified
in “Pipe/Liner 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” (75 mm) standard, or 4” (100 mm), see Page 13 - for determining
correct size vent. When 4” pipe is used: for horizontal vent installations
use a 3” (75 mm) to 4” (100 mm) adapter - available from vent manufacturer. For vertical installations use a 3” (75 mm) to 4” (100 mm) “tee”
- available from vent manufacturer.
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
• 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 direc
tion change.
• Maximum Vertical Vent - 30 feet (9.14 M)
• 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.
• Pellet vent pipe requires 3” (75 mm) clearance from outside of pipe
unless otherwise specified by vent manufacturer - all diameters: 3” (75
mm) and 4” (100 mm). A support bracket must be installed every 4
feet (1.2 m) of pellet vent pipe on the exterior wall of the house unless
otherwise specified by vent manufacturer.
• It is not recommended to terminate exhaust vent on the prevailing
wind side of the house.
• In Canada, where the venting may pass through a wall, or partition
of combustible materials, the installation shall conform to CAN/CSAB365. When installing the wall thimble and other venting components,
follow the vent manufacturers instructions. Maintain an effective
vapor barrier at the location where the chimney or other component
penetrates to the exterior of the structure.
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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
9
Pipe/Liner Joint Requirements
Vent Termination
Silicone sealant and three screws are required to secure the first vent
connection to the appliance flue collar. Secure and seal the remaining
vent sections per the vent manufacturers instructions. ALL horizontal
joints must be sealed gas-tight (air tight, sealed connection). Use RTV
high temperature silicone or Interam, if necessary, to provide a complete
seal between vent sections.
Connection to Masonry Chimney through a Wall
Be sure to verify the construction of a masonry chimney, as it may have
combustible framing.
Approved liner when relining Masonry or Factory Built Fireplaces is
2100HT (degree F.) liner listed to UL 1777 or ULC S635.
Connection to an Existing Class A Chimney
A chimney adapter can be used to make the connection from 3” (75
mm) or 4” (100 mm) pellet vent pipe (listed to UL 641 or ULC S609) to
existing UL chimney system. Verify with the pipe manufacturer that your
pipe brands will interconnect.
Horizontal Vent Installations
On all horizontal 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 feet (2.5 m) 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.
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 feet (.92 m) above any forced air inlet (air conditioner,
etc.) located within 10 feet (3 m).
B. Not less than 4 feet (1.2 m) below, 4 feet (1.2 m) horizontally from or
1 foot (3.1 m) above any gravity air inlet (door, window, etc.) which
flue gases could reenter the dwelling.
C. Not less than 2 feet (.6 m) 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 feet (2.1 m)
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 feet (.92 m) below an eave (maximum overhang of 3
feet (.92 m) or any construction that projects more than 2” (51 mm)
from the plane of the wall.
E. The distance from the bottom of termination to grade is 12” (305 mm)
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 feet (.92 m) 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 1/4” [7 mm] rise per foot horizontal).
10
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
Vent Termination Locations
Vent Terminal
Area Where Terminal Is Not Permitted
(From Eave)
Vertical Terminal
Vertical Terminal
Fixed Closed
Able To Open
A
A
B
B
B
B
C
D
E
F
G
H
J
K
L
M
N
24”
(610mm)
B
Air Supply Inlet
24”
(610mm)
A = Clearance above grade, veranda, porch, deck, or bal-
cony (min. 12”/30cm)
B = Clearance to window or door that may be opened (min.
12”/30cm above - 48”/1.2m below and to the side)
C = Clearance to permanently closed window *(min.
D = Vertical clearance to ventilated soffit located above
12”/30cm)
the terminal within a horizontal distance of *(min.
24”/60cm) from the centerline of the terminal (min.
22”/55cm) check with local code.
E = Clearance to unventilated soffit *(min. 12”/30cm)
F = Clearance to outside corner *(min. 12”/30cm)
G = Clearance to inside corner *(min. 12”/30cm)
H = Not to be installed above a meter/regulator assembly
within *(min. 36”/90cm) horizontally from the center-
line of the regulator.
J = Clearance to service regulator vent outlet *(min.
72”/1.8m)
K = Clearance to non-mechanical air supply inlet to build
ing or the combustion air inlet to any other appliance
Figure 8
*(min. 48”/1.2m)
L = Clearance to a mechanical air supply inlet *(min.
120”/3.1m)
M = **Clearance above paved sidewalk or a paved driveway
located on public property *(min. 84”/2.1m)
N = ***Clearance under veranda, porch, deck, or balcony
(min. 12”/30cm)
Note:
* Local codes or regulations may require different clear
ances.
** A vent shall not terminate directly above a sidewalk or
paved driveway which is located between two single
family dwellings and serves both dwellings.
*** Only permitted if veranda, porch, deck, or balcony is
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
-
fully open on a minimum of two sides beneath the
floor.
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11
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