SHERWOOD INDUSTRIES IS AN ENVIRONMENTALLY RESPONSIBLE COMPANY. THIS MANUAL IS PRINTED ON RECYCLED
PLEASE KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE
PAPER.
PELLET STOVE
Evolution
OWNER’S MANUAL
Contact your building or fire officials about restrictions and installation
inspection requirements in your area.
PLEASE READ THIS ENTIRE MANUAL BEFORE INSTALLATION
AND USE OF THIS PELLET-BURNING ROOM HEATER. FAILURE TO
FOLLOW THESE INSTRUCTIONS COULD RESULT IN PROPERTY
DAMAGE, BODILY INJURY OR EVEN DEATH.
50-1021
Table of Contents
Introduction...................................................................................................................................3
Rating Label Location................................................................................................................3
Pellet Quality............................................................................................................................3
Important Safety Data...............................................................................................................4
Safety Warnings And Recommendations.....................................................................................4
Operating Instructions.....................................................................................................................6
Control Board Functions............................................................................................................6
Automatic Safety Features of Your Pellet Stove............................................................................6
Operating Your Pellet Stove.......................................................................................................7
Turning Your Pellet Stove Off......................................................................................................7
Routine Cleaning and Maintenance..................................................................................................8
Installation...................................................................................................................................11
Deciding Where to Locate your Pellet Appliance........................................................................11
Removing Pellet Stove From Pallet............................................................................................11
Appliance Dimensions.............................................................................................................12
Clearances to Combustibles.....................................................................................................13
Alcove Clearances...................................................................................................................13
Hearth Pad Pedestal Installation...............................................................................................14
Vent Termination Requirements................................................................................................15
Outside Fresh-Air Connection...................................................................................................16
Exhaust And Fresh Air Intake Locations....................................................................................16
Mobile Home Installation.........................................................................................................17
Corner Through Wall Installation..............................................................................................17
Horizontal Exhaust Through Wall Installation............................................................................18
Through Wall With Vertical Rise and Horizontal Termination Installation- Recommended..............19
Through Concrete Wall With Vertical Rise Installations...............................................................19
Inside Vertical Installations......................................................................................................20
Outside Vertical Installations....................................................................................................20
Hearth Mount Installation........................................................................................................21
Exterior Mounted Exhaust Blower.............................................................................................22
Typical Through Wall With Exterior Blower Kit Installation - Horizontal Termination......................23
Typical Through Wall With Exterior Blower Kit Installation - Vertical Termination..........................24
Thermostat Installation............................................................................................................25
Optional Slider/Damper Installation..........................................................................................25
Slider/Damper Set-Up.............................................................................................................26
Troubleshooting............................................................................................................................27
Fuses.....................................................................................................................................29
Wiring Diagram.............................................................................................................................30
Parts List......................................................................................................................................31
Parts Diagram - Components.........................................................................................................33
Parts Diagram - Steel.....................................................................................................................34
Warranty......................................................................................................................................35
Installation Data Sheet..................................................................................................................36
2
Introduction
RATING LABEL LOCATION:
The rating label is located on the inside of the ash pan cover.
PELLET QUALITY:
Pellet quality is important, please read the following:
Your enviro pellet stove has been designed to burn wood pellets only. Do not use any other
type of fuel, as this will void any warranties stated in this manual.
The performance of your pellet stove is greatly affected by the type and quality of wood
pellets being burned. As the heat output of various quality wood pellets differs, so will the
performance and heat output of the pellet stove.
CAUTION: It is important to select and use only pellets that are dry and free of dirt or any impurities
such as high salt content. Dirty fuel will adversely affect the operation and performance of the unit
and will void the warranty. The Pellet Fuel Industries (P.F.I.) has established standards for wood pellet
manufacturers. We recommend the use of pellets that meet or exceed these standards. Ask your dealer
for a recommended pellet type.
P.F.I. PELLET STANDARDS:
Fines (fine particles)......1% maximum through a 1/8” screen
Bulk Density..................40 pound per cubic foot minimum
Size..............................” to 5/16” diameter – 1” long maximum
Ash Content..................1% maximum (Premium grade)
..................3% maximum (Standard grade)
Moisture Content...........8% maximum
Heat Content.................approximately 8200 Btu per pound minimum
ASH: The ash content of the fuel and operation of your stove will directly determine the frequency of
cleaning. The use of high ash fuels may result in the stove needing to be cleaned daily. A low ash fuel
may allow longer intervals between cleaning.
CLINKERING: [clinkers are silica (sand) or other impurities in the fuel that will form a hard mass during
the burning process]. This hard mass will block the air flow through the Burn Pot Liner and affect the
performance of the stove. Any fuel, even approved types, may tend to clinker. Check the Burn-Pot Liner
daily to ensure that the holes are not blocked with clinkers. If they become blocked, remove the liner
(when the unit is cold) and clean/scrape the clinkers out. Clean the holes with a small pointed object if
required. Refer to the section Routine Cleaning and Maintenance.
PELLET FEED RATES: Due to different fuel densities and sizes, pellet feed rates may vary. This may
require an adjustment to the slider damper setting or to the auger feed trim setting on low.
Since Sherwood Industries Ltd. has no control over the quality of pellets that you use, we assume no
liability for your choice in wood pellets.
Store pellets at least 36” (1 m) away from the pellet stove.
3
Introduction
IMPORTANT SAFETY DATA:
Please read this entire Owner’s Manual before installing or operating your ENVIRO Pellet
Stove. Failure to follow these instructions may result in property damage, bodily injury
or even death. Contact your local building or fire official to obtain a permit and any information on
installation restrictions and inspection requirements for your area.
To prevent the possibility of a fire, ensure that the appliance is properly installed by adhering to the
installation instructions. An ENVIRO dealer will be happy to assist you in obtaining information with
regards to your local building codes and installation restrictions.
Be sure to maintain the structural integrity of the home when passing a vent through walls, ceilings, or
roofs.
The stove’s exhaust system works with negative combustion chamber pressure and a slightly positive
chimney pressure. It is very important to ensure that the exhaust system be sealed and airtight. The ash
pan and viewing door must be locked securely for proper and safe operation of the pellet stove.
Do not burn with insufficient combustion air. A periodic check is recommended to ensure proper
combustion air is admitted to the combustion chamber. Setting the proper combustion air is achieved by
adjusting the slider damper located on the left side of the stove.
When installing the stove in a mobile home, it must be electrically grounded to the steel chassis of the
home and bolted to the floor. Make sure that the structural integrity of the home is maintained and all
construction meets local building codes.
Minor soot or creosote may accumulate when the stove is operated under incorrect conditions such as an
extremely rich burn (black tipped, lazy orange flames).
If you have any questions with regard to your stove or the above-mentioned information, please feel free
to contact your local dealer for further clarification and comments.
SAFETY WARNINGS AND RECOMMENDATIONS:
Caution: Do not connect to any air distribution duct or system.
Do not burn garbage or flammable fluids such as gasoline, naptha or engine oil.
Unit hot while in operation. Keep children, clothing and furniture away. Contact
may cause skin burns.
FUEL: This pellet stove is designed and approved to only burn wood pellet fuel with up to 3% ash
content. Dirty fuel will adversely affect the operation and performance of the unit and may void the
warranty. Check with your dealer for fuel recommendations.
THE USE OF CORDWOOD IS PROHIBITED BY LAW.
SOOT: Operation of the stove with insufficient combustion air will result in the formation of soot which
will collect on the glass, the heat exchanger, the exhaust vent system, and may stain the outside of the
house. This is a dangerous situation and is inefficient. Frequently check your stove and adjust the slider/
damper as needed to ensure proper combustion. See: “SLIDER/DAMPER SETTING”.
CLEANING: There will be some build up of fly ash and small amounts of creosote in the exhaust. This
will vary due to the ash content of the fuel used and the operation of the stove. It is advisable to inspect
and clean the exhaust vent semi-annually or every two tons of pellets.
4
Introduction
ASHES: Disposed ashes should be placed in a metal container with a tight fitting lid. The closed container
of ashes should be on a non-combustible floor on the ground, well away from all combustible materials
pending final disposal. If the ashes are disposed of by burial in soil or otherwise locally dispensed, they
should be retained in the closed container until all cinders have been thoroughly cooled.
ELECTRICAL: The use of a surge protected power bar is recommended. The unit must be
grounded. The grounded electrical cord should be connected to a standard 115 volts (4.7 Amps), 60
hertz electrical outlet. Be careful that the electrical cord is not trapped under the appliance and that it is
clear of any hot surfaces or sharp edges and also must be accessible. If this power cord should become
damaged, a replacement power cord must be purchased from the manufacture or a qualified ENVIRO
dealer. This unit’s maximum power requirement is 540 watts.
GLASS: Do not abuse the glass by striking or slamming the door. Do not attempt to operate the stove
with broken glass. The stove uses ceramic glass. Replacement glass must be purchased from an ENVIRO
dealer. Do not attempt to open the door and clean the glass while the unit is in operation or if glass is
hot. To clean the glass, use a soft cotton cloth and mild window cleaner, gas or wood stove glass cleaner,
or take a damp paper towel and dip into the fly ash. This is a very mild abrasive and will not damage the
glass.
FLAMMABLE LIQUIDS: Never use gasoline, gasoline-type lantern fuel, kerosene, charcoal lighter
fluid, or similar liquids to start or “freshen up” a fire in the heater. Keep all such liquids well away from
the heater while it is in use.
SMOKE DETECTOR: Smoke detectors should be installed and maintained in the structure when
installing and operating a pellet burning appliance.
OPERATION: The ash pan and door must be closed securely for proper and safe operation of the pellet
stove. Also ensure all gaskets on the door are checked and replaced when necessary.
KEEP ASH PAN FREE OF RAW FUEL.
DO NOT PLACE UNBURNED OR NEW PELLET FUEL IN ASH PAN. A fire in the ash pan may occur.
INSTALLATION: Be sure to maintain the structural integrity of your home when passing a vent through
walls, ceilings, or roofs. It is recommended that the unit be secured into its position in order to avoid any
displacement.
DO NOT INSTALL A FLUE DAMPER IN THE EXHAUST VENTING SYSTEM OF THIS UNIT.
DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE.
FRESH AIR: Outside Fresh Air connection is optional. Must be connected to all units installed in Mobile
and “Air Tight Homes” (R2000) or where required by local codes. Consider all large air moving devices
when installing your unit and provide room air accordingly. Limited air for combustion may result in poor
performance, smoking and other side effects of poor combustion.
If you have any questions with regards to your stove or the above-mentioned information, please feel
free to contact your local dealer for further clarification and comments.
SINCE SHERWOOD INDUSTRIES LTD. HAS NO CONTROL OVER THE INSTALLATION OF
YOUR STOVE, SHERWOOD INDUSTRIES LTD. GRANTS NO WARRANTY IMPLIED OR STATED
FOR THE INSTALLATION OR MAINTENANCE OF YOUR STOVE. THEREFORE, SHERWOOD
INDUSTRIES LTD. ASSUMES NO RESPONSIBILITY FOR ANY CONSEQUENTIAL DAMAGE(S).
SAVE THIS INSTRUCTION MANUAL FOR FUTURE REFERENCE
5
Operating Instructions
AUGER TRIM
FAN
MANUAL FEED
ON/OFF
HEAT LEVEL
CONTROL BOARD FUNCTIONS:
1. AUGER TRIM: Used to change feed rates on LOW ONLY for poorer quality fuels. Push the Auger
Trim button until the number 1 and 5 lights appear on the Heat Level Indicator. This will increase the
feed rate to 4 seconds ON time Auger pulse. This is done only on LOW to allow the burning of poor
quality fuels. Push the button until the number 1 and 4 lights appear, this will reduce the Auger On
time to 2 second. This setting is for high-grade fuel only. Push the button until just the number 1
light is on, this is for a three (3) second on time (standard setting).
2. CONVECTION BLOWER CONTROL: Used to turn the convection blower ON/OFF. Leave the
convection blower ON for peak efficiency
3. AUGER PULSE LIGHT: This light will flash in conjunction with the auger.
4. MANUAL AUGER FEED: If the unit runs out
of fuel, this button can be used to “prime the
auger system”. This button will turn off after 60
seconds and then must be released and pressed
again.
5. SYSTEM LIGHT: Responsible for signaling
the state of the control board. When the light
is flashing during start-up, the stove is in an
automatic start mode. When the light is solid,
the Heat Level Setting can be altered.
6. ON/OFF BUTTON: Used to turn the unit ON
and OFF.
7. HEAT OUTPUT INDICATOR: Shows the
present heat output setting.
8. HEAT LEVEL ADJUSTMENT: When pressed,
will change the heat setting of the unit from
low to high.
Figure 1: Circuit Board Control Panel Decal
AUTOMATIC SAFETY FEATURES OF YOUR PELLET STOVE:
A. The stove will shut off when the fire goes out and the exhaust temperature drops below 120°F
(49°C).
B. The stove has a high temperature safety switch. If the temperature on the hopper reaches 200°F
(93°C), the auger will automatically stop and the stove will shut down when the exhaust temperature
cools. If this happens, call your local dealer to reset the 200°F (93°C) high limit switch. ALSO FIND
THE REASONS WHY THE UNIT OVERHEATED.
6
Operating Instructions
OPERATING YOUR PELLET STOVE:
PRE-BURN INSTRUCTIONS: The burn pot liner holes must be clear and the liner installed properly
against the ignitor tube for proper operation. Check the hopper for enough pellets to start the unit.
DO NOT OPERATE THE UNIT WITH THE DOOR OR ASH PAN OPEN.
MANUAL MODE:
To START: Press the ON / OFF button. The stove will turn on. The system light will flash. The Auger
Light will flash with each pulse of the auger (the Auger Feed Rate is pre-programmed during start-up).
The Heat Level Indicator will show the Heat Level that the stove will run at after start-up.
If this is the first time the unit has been started or the unit has run out of fuel, the auger will need to
be primed. Press the Manual Auger Feed button until fuel starts to drop into the Burn Pot Liner (see
“OPERATING INSTRUCTIONS; CONTROL BOARD FUNCTIONS”).
To OPERATE: When a fire has been established, the System Light will turn solid (after approximately 10
- 15 minutes) and the Auger Light will continue to flash to the corresponding Heat Level setting. The Heat
Level button can now be pressed at this time to change the desired Heat Level Output setting.
The convection blower (room air blower) will turn on. The speed of this blower is controlled by the setting
of the heat level output indicator. The convection blower can be turned OFF by depressing the convection
blower control button. For the best efficiency and to prevent cycling, the convection blower should be
left on at all times.
When operating on LOW HEAT LEVEL, the feed rate can be adjusted, using the auger trim, for different
quality fuels. These settings can be used if the fire keeps going out on low (poor quality fuel). Or if the
low setting is too hot for the room (see “OPERATING INSTRUCTIONS; CONTROL BOARD FUNCTIONS”).
THERMOSTAT / SWITCH MODE:
INITIAL START-UP: See above
OPERATION - HI / LOW mode: When the thermostat contacts are closed the stove settings are
adjustable as per Manual Mode (see above). When the thermostat contacts open, the circuit board will
take control of the settings. The stove will drop down to a low burn until the thermostat contacts close
again. This low burn setting can be adjusted for different fuel qualities (see “OPERATING INSTRUCTIONS;
CONTROL BOARD FUNCTIONS”). The stove will come back to the previous HEAT LEVEL setting when the
thermostat contacts close again.
OPERATION – ON / OFF mode: When the thermostat contacts close, the unit will light automatically.
Once up to temperature, the stove operates the same as in manual mode (see above). When the
thermostat contacts open, the unit automatically begins its shutdown routine. The stove will re-light
when the thermostat contacts close again.
TURNING YOUR PELLET STOVE OFF:
• MANUAL and HI / LOW mode: To turn the unit OFF, simply press the ON / OFF button. This will stop
the feed of pellets. The blowers will continue to operate and cool the stove down. When cool enough,
the stove will turn off.
• ON / OFF mode: To turn the unit OFF, turn the thermostat down or off.
DO NOT unplug unit while Combustion fan is operating.
This may lead to smoke escaping from the stove.
7
Routine Cleaning and Maintenance
Burn Pot
Liner
Ignitor
Air Intake
Tube
Burn
Pot
The following list of components should be inspected and maintained routinely to ensure that the
appliance is operating at its’ optimum and giving you excellent heat value:
2-3 Days / Weekly Bi-annually or 2 Tons of Fuel
Burn Pot and Liner Exhaust Vent
Heat Exchanger Tubes Fresh Air Intake Tube
Ash Pan Blower Mechanisms
Door Glass Heat Exchanger Tubes
Inside Firebox Behind Firebox Liners
Ash Pan and Door Gaskets All Hinges
Door Latch Post Season Clean-up
Figure 2: EF5 Burn pot and Liner
TOOLS REQUIRED TO CLEAN UNIT:
Torx T-20 Screwdriver, 5/16” wrench or socket, Brush, Soft Cloth, Vacuum with fine filter bag
BURNER POT AND LINER (2-3 days)
To remove the burn pot and burn pot liner, open the door using the door handle provided (located on the
left-hand side of the stove). Swing the door open. Lift the liner from the burn pot. Lift the burn pot from
the firebox by gently lifting up the front of the burn pot, then sliding the assembly from the air intake
tube and the ignitor cartridge.
This is the ‘pot’ where the pellets are burned. Every two to three days (when the unit is cold), remove
the burn-pot liner from the stove. Using a metal scrapper, remove material that has accumulated or is
clogging the liner’s holes. Then dispose of the scrapped ashes from the liner and from inside the burnpot. Place the burn-pot back into the stove, making sure that the pipes are properly inserted into the burn
pot. Place the liner back into the burn-pot, making sure that the ignitor hole in the liner is aligned with
the ignitor tube. Pushing the liner up against the ignitor tube.
If, after long periods of burning, the fire continually builds up and overflows the burn pot or there is a
build up of clinkers, this is an indication that the pellet fuel quality is poor or the stove may need cleaning.
Check the stove for ash build up (clean if required) and adjust the slider / damper to produce the proper
clean combustion.
HEAT EXCHANGER TUBES (2-3 days)
A handle is located under the unit top, in the center of the stove just above the door (shown in Figure
3). This handle is to be pulled up and down a few times (ONLY WHEN THE UNIT IS COLD) in order to
clean away any fly ash that may have collected on the heat exchanger tubes. As different types of pellets
produce different amounts of ash, cleaning of the tubes should be done on a regular basis to enable the
unit to run efficiently.
ASH PAN AND DOOR GASKETS (weekly)
After extended use the gasketing may come loose. To repair this, glue the gasketing on using hightemperature fiberglass gasket glue available from your local dealer. This is important to maintain an
airtight assembly.
8
Routine Cleaning and Maintenance
Vacuum inside ash box
Heat exchanger tubes
cleaner handle.
ASH PAN (weekly)
This part is located under the burner, in the pedestal, and has a latching mechanism to secure it. To
remove the ash pan, open the cover from the right hand side, unlock the latch on the pedestal cover and
pull the pan out. Dump the ashes into a metal container stored away from combustibles. Monitor the ash
level every week. Remember that different pellet fuels will have different ash contents. Ash content is a
good indication of fuel efficiency and quality. Refer to “Warnings and Recommendations” for disposal of
ashes. Vacuum the inside of the ash pan compartment inside the pedestal including the hole at the top
back of the compartment. Replace the ash pan and close pedestal door. DO NOT PLACE UNBURNED
OR RAW PELLET FUEL IN ASH PAN.
DOOR GLASS CLEANING (2-3 days)
Cleaning of the glass must only be done when stove is cold. Open the door by lifting the handle. The glass
can be cleaned by wiping down the outside and inside of the glass with a dry soft cloth.
If the glass has build up that can not be removed with only the cloth, clean the glass using paper towel
and a gas appliance glass cleaner, this may be purchased through most dealers. If a gas appliance glass
cleaner is not available, use a damp paper towel dipped in y ash to clean the glass. After the glass has
been cleaned use the dry soft cloth to wiping down the outside and inside of the glass.
FRESH AIR INTAKE (biannually)
Inspect periodically to be sure that it is not clogged with any foreign materials.
EXHAUST PASSAGES (biannually)
Removal of the firebox backing for bi-annual
• Open the door by lifting the handle, remove the
• Lubricate all screws with penetrating oil.
• Remove the four (4) screws that hold the side
• With the tip of a flat screwdriver, gently lift up the
• Pull the center panel out.
• Vacuum thoroughly.
Installation of firebox backing:
• Insert center panel.
• Place the side panels back into the firebox and re-
• Replace the glass door and secure.
• Clean thoroughly.
cleaning
burn pot and burn pot liner.
panels in place.
side panels and remove the side panels.
install the two (2) screws on each side.
Figure 3: EF5 Open
9
Routine Cleaning and Maintenance
EXHAUST VENT (biannually)
This vent should be cleaned every year or after two tons of pellets. We recommend contacting your
dealer for professional cleaning. To clean the vent pipe, tap lightly on the pipe to dislodge any loose ash.
Open the bottom of the “T” to dump the ash, then vacuum as much of the ash out of the vent pipe as
possible.
BLOWER MECHANISMS (season)
Unplug the stove then open the right and left side panels to access the two blowers. Vacuum all dust
from motors. Only the convection blower motor (on the right side of the stove) will require lubrication.
The convection motor has two lubrication holes on it. Use two (2) drops of SAE 20 light oil to lubricate
every six (6) months. Excess oil may damage the motor. The exhaust blower’s motor has sealed bearings,
DO NOT lubricate this motor. Check gaskets and replace if needed.
POST SEASON CLEAN-UP
Once you are finished using the pellet appliance for the season, unplug the stove for added electrical
protection. It is very important that the stove be cleaned and serviced as stated above.
CLEANING PLATED SURFACES
Please clean all fingerprints off of all plated parts, with denatured alcohol on a soft cloth, before firing the
unit each time. Fingerprints, etc. can become permanently etched into the plating if not removed before
operating the pellet heater.
BRICK PANEL
The paint on the steel brick panel may peel. This is due to extreme conditions applied to the paint and is
in no way covered by warranty.
DOOR GLASS REPLACEMENT
It is recommended that your dealer replace the glass if broken. The door glass is made of high temperature
PYRO CERAMIC. To replace the glass, unscrew and remove the four glass retainers. Remove the glass
and any broken pieces. High temperature fiberglass tape should be used around the glass. Replace the
glass by securing the glass retainers back to the frame ensure the glass is seated in the bottom glass
retainer. The use of substitute materials is prohibited use only part 20-023.
10
Remove the two (2)
wood screws (one
on either side of the
unit) to remove the
unit from the pallet.
Installation
DECIDING WHERE TO LOCATE YOUR PELLET APPLIANCE:
1. Check clearances to combustibles.
2. Do not obtain combustion air from an attic, garage or any unventilated space.
Combustion air may be obtained from a ventilated crawlspace.
3. Do not install the stove in a bedroom.
4. You can vent the stove through an exterior wall behind the unit or connect
it to an existing masonry or metal chimney (must be lined if the chimney is
over 6” (15 cm) diameter, or over 28 inches² (180 cm²) cross sectional area).
An interior vent can be used with approved pipe passing through the ceiling
and roof.
5. Locate the stove in a large and open room that is centrally located in the
house. This will optimize heat circulation.
6. The power cord is 8 feet (2.43 m) long and may require a grounded extension
cord to reach the nearest electrical outlet.
REMOVING PELLET STOVE FROM PALLET:
1. Remove the right and left hand cabinet sides by loosening the three (3) T-20 Torx screws on the back
of the each panel.
2. Remove the one (1) screw located on
the front of the cabinet side, behind
the top louvers and one (1) screw
behind the ash door.
3. Remove the two (2) wood screws
that are holding the bottom of the
stove to the pallet.
4. Close the side panels.
Figure 4: Screws to take out to remove stove from pallet.
11
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