Enviro EF4 User manual

PELLET STOVE
EF4
SHERWOOD INDUSTRIES IS AN ENVIRONMENTALLY RESPONSIBLE COMPANY. THIS MANUAL IS PRINTED ON RECYCLED PAPER.
PLEASE KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE
OWNER’S MANUAL
50-839
Freestanding and Fireplace Insert
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  
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.
Contact your building or fire officials about restrictions and
installation inspection requirements in your area.

Table of Contents
2
Table of Contents......................................................................................................2
Introduction.............................................................................................................3
Rating Label Location.....................................................................................3
Pellet Quality..................................................................................................3
Important Safety Data....................................................................................4
Safety Warnings And Recommendations..........................................................4
Operating Instructions..............................................................................................6
Automatic Safety Features..............................................................................6
Slider/Damper Setting....................................................................................6
Operating Your Pellet Stove.............................................................................7
Turning Your Pellet Stove Off...........................................................................7
Routine Cleaning and Maintenance.............................................................................8
Warranty................................................................................................................11
Installation Data Sheet............................................................................................12

3
Introduction
RATING LABEL LOCATION:
Freestanding: The rating label is located on the inside of the hopper lid.
Fireplace Insert and Built-In Heater: The rating label is located on the hopper 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.
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.

4
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.
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.
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.
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. The ashes should be retained in the closed container until all cinders
have thoroughly cooled before disposing of them.

5
Introduction
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 220-240 volts (2.17-
2.36 Amps), 50 hertz electrical outlet and also must be accessible. If this power cord should become
damaged, a replacement power cord must be purchased from the manufacturer or a qualified ENVIRO
dealer. Be careful that the electrical cord is not trapped under the appliance and that it is clear of any
hot surfaces or sharp edges. This unit’s maximum power requirement is 520 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.
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

6
Operating Instructions
AUTOMATIC SAFETY FEATURES:
Your pellet Stove has the following safety features:
A. The stove will shut off when the fire goes out and the exhaust temperature drops below 140°F
(60°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.
C. The unit has a convection fan control over-ride. This function causes the convection fan to reach its full
speed when the temperature at the back of the firebox reaches 160°F (71°C). This is a normal safety
feature of your unit. To compensate for the fan cycling action that may occur, turn up the blower
control proportionately to the heat output.
D. If the power goes out, the unit will stop running. When the power comes back on, the stove will not
restart unless the exhaust temperature is still above 120°F (49°C).
SLIDER/DAMPER SETTING:
This is used to regulate the airflow through the pellet stove.
The slider damper is pre-set from the factory; it is set and held in
place with a 5/16” hex screw. This setting does not mean it should not
be re-adjusted for fuel quality.
The slider damper is located behind the left side panel. To open the
left side panel, undo the one screw located in the upper front corner
of the cabinet side
SPECIAL NOTES:
Pellet quality is a major factor in how the pellet stove will operate. If the pellets have a high moisture
content or ash content the fire will be less efficient and has a higher possibility of the fire building up and
creating clinkers (hard ash build-up).
If the fire should happen to go out and the Dial-A-Fire has been set on the lowest setting, the Slider
Damper should be pushed in slightly, decreasing the air in the firebox or the Dial-A-Fire and Auger Trim
can be turned up slightly.
If, after long periods of burning, the fire builds up and overflows the burn pot or there is a build up of
clinkers, this would be a sign that the pellet quality is poor, this requires more primary air, the slider
damper must be pulled out to compensate. Pulling the slider damper out gives the fire more air.
The easiest way to make sure that an efficient flame is achieved is to understand the characteristics of
the fire.
• A tall, lazy flame with dark orange tips, requires more air – Open slider (pull out) slightly.
• A short, brisk flame, like a blowtorch, has too much air – Close slider (push in) slightly.
• If the flame is in the middle of these two characteristics with a bright yellow/orange, active flame
with no black tips then the air is set for proper operation.
Taking a reading of vacuum pressure inside the firebox with a magnehelic gauge can be used to set
the slider for best combustion. The best settings are a reading of 0.11 to 0.12 inches of water
column on the high fire setting. Some fuels may require higher or lower settings.
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Figure 1: Slider Damper.

KNOB “A”: Fan Controller. By adjusting the knob you will vary the rate of airflow into the room by varying
the speed of the convection blower. When you first start the stove, it should be placed in the “OFF”
position in order to heat the unit as quickly as possible. Once the room has come up to temperature, the
control may be set to a comfortable level. *Note: The convection blower may cycle to high automatically
depending on the setting of knobs “A” and “B”. This is a normal safety feature of the unit.
KNOB “B”: Dial a Fire Heat Output Knob. This knob controls the amount of heat output. The dial
has a scale with the blue zone representing the coolest setting of the stove, and the red zone
representing the hottest setting. *Note: The scale on the Dial A Fire knob represents a range, not
exact times. Wood pellets of differing quality may affect the performance of the stove. If the stove has
trouble operating at the ends of its’ range, turn the heat output knob back slightly.
TURNING YOUR PELLET STOVE OFF:
To turn your stove off, simply turn the HEAT OUTPUT knob (“Knob B”) counter-clockwise until the knob
clicks to the “OFF” position. This will stop the feed of pellets. The blowers will continue to run and cool
the stove. When cool enough, the stove will shut down.
DO NOT unplug unit while combustion fan is operating. This may lead to smoke
escaping from the stove.
Operating Instructions
OPERATING YOUR PELLET STOVE:
Convection
blower speed
control; Knob A
Auger light
Start-up
switch
Dial-A-Fire
heat output;
Knob B
Figure 2: Dial-A-Fire control panel.
1. Check and fill hopper with pellets.
2. Make sure unit is plugged into a working outlet.
3. Switch the power “ON” by pushing the start-up switch once
only.
4. Turn knob “B” to the 12 o’clock position. (Lower grade
pellets may need a higher setting on the feed rate).
NOTES: It will take longer to light if the hopper has been
completely emptied or is the first fire up. The flashing
green light corresponds to the auger feed rate.
5. Wait until the fire is established, then turn knob “B” to the
desired heat output. The stove may not be able to burn in
the BLUE ZONE if poor quality wood pellets are being used.
Adjust the slider-damper to the appropriate setting (see
“SLIDER/DAMPER SETTING” section).
6. If the stove should shut off after fifteen (15) minutes and
there is still a fire in the firebox – press the start up switch
once more. If the fire went out, return to Step 2 and re-
light the stove.
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8
Routine Cleaning and Maintenance
NOTE: Do not use abrasive cleaners to clean the surface or any part of the stove.
The following should be inspected periodically to ensure that the appliance is operating at its optimum
and giving you excellent heat value:
2-3 DAYS/WEEKLY SEASON or 2 TONS OF FUEL
Burn Pot and Liner Exhaust Vent
Ash Pan Fresh air Intake Tube
Inside Firebox Blower Mechanisms
Door Glass Heat exchanger tubes
Heat exchanger tubes Behind firebox liners
Ash pan & Door gaskets All Hinges
Door Latch Post Season Clean-up
BURN POT AND LINER (2-3 days)
This is the ‘pot’ where the pellets are burned. The burn pot and
liner should be inspected every two to three days, to ensure
proper air flow through the liner. Failure to keep the liner
clean may cause a build up of fuel past the burn pot
liner and up the drop tube. This will cause the auger to
jam and may result in pellets burning in the drop tube
and hopper.
Ensure the unit is cold before cleaning. 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 the front of the burn pot up
first, then sliding the assembly from the air intake tube and the ignitor cartridge. Using a metal scraper,
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 burn pot. Place the burn pot back into the stove, making sure that the
pipes are properly inserted into the burn pot and the front tabs are placed in the firebox. Place the liner
back into the burn-pot making sure that the ignitor hole in the liner is aligned with the ignitor tube. Push
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.
EXHAUST PASSAGES (2-3 days)
For bi-weekly clean out, ash may be removed from behind the steel plates by rotating the circular covers
located behind the right and left side panels (see Figure 4). To open the side panels undo one (1) T-20
screw on each side (top front). When the side cabinet doors have been opened, there are two (2) round
disks at the bottom of the firebox. Loosen, but do not remove, the screw on the disks and open, this will
allow vacuuming behind the firebox liner’s plates.
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TOOLS REQUIRED TO CLEAN UNIT
• Torx T-20 Screwdriver
• 5/16” Wrench or Socket
• Brush
• Soft Cloth
• Vacuum with fine filter bag
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:
Figure 3: Burn pot with liner.

ASH PAN AND DOOR GASKETS (weekly)
After excessive use the gasket may come loose. To repair this, glue the gasket on, using high-temperature
fiberglass gasket glue available from your local ENVIRO dealer. This is important to maintain an airtight
assembly.
ASH PAN (weekly)
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. DO NOT PLACE UNBURNED OR RAW PELLET FUEL IN ASH PAN.
INSERT ASH REMOVAL:
The EF4 pellet stove insert does not have an ash pan and the ashes must be vacuumed out of the
firebox on a daily basis. CAUTION: BECAUSE THE FLY ASH IS VERY FINE, THE USE OF A VACUUM
BAG WILL BE REQUIRED TO PREVENT ASH FROM BEING BLOWN BACK INTO THE ROOM. Please
pay special attention that there are no hot ashes in the firebox or there could be a possibility of a
fire hazard inside the vacuum cleaner. Place all hot ashes into a non-combustible container.
FREESTANDING ASH PAN:
This part is located under the burner, in the pedestal, and has a latching mechanism to secure it.
To remove the ash pan, unlock the latch on the pedestal cover and then pull the pan out. Dump
the ashes into a metal container stored away from combustibles. Monitor the ash level every week.
HEAT EXCHANGER TUBES (weekly)
A handle is located under the hopper lid, in the
center of the stove just above the door, pointed out
in Figure 4. 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.
FRESH AIR INTAKE (season)
Inspect periodically to be sure that it is not clogged
with any foreign materials.
Removal of the firebox backing for bi-annual cleaning:
• Open the door by using the handle provided.
• Remove the burn pot and burn pot liner.
• Lubricate all screws with penetrating oil.
• Undo the four (4) screws and remove the firebrick liner.
• Remove the two (2) top baffles (take note of their position).
• Just above the ash sill there are two (2) screws that hold the firebox liners in place, remove these
two (2) screws.
• With the tip of a flat screwdriver, gently lift up the side panels and remove the side panels.
• Pull the center panel out.
• Vacuum and clean thoroughly.
Routine Cleaning and Maintenance
Figure 4: EF4 opened.
  
 
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9

10
Installation of firebox backing:
• Insert center panel.
• Place the side panels in the firebox and re-install the two (2) lower screws. Install top baffles.
• Replace the firebrick liner.
• Replace the burn pot and burn pot liner.
• Close the glass door and secure.
EXHAUST VENT (season)
The products of combustion will contain small particles of flyash. The flyash will collect in the exhaust
venting system and restrict the flow of the flue gases. 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. The exhaust venting system should be inspected at least
once every year or after two tons of pellets to determine if cleaning is necessary. We recommend
contacting your dealer for professional cleaning. To remove dust from 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/left side panels to access the two blowers. Vacuum all dust from
the 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 drops of SAE 20 light oil to lubricate every six
months. Excess oil may damage the motor. The exhaust blower’s motor has sealed bearings, DO NOT
lubricate this motor.
DOOR GLASS (It is recommended that your dealer replace the glass if broken.)
The door glass is a high temperature PYROCERAMIC. 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, center the glass assembly in the frame, then screw the glass
retainers back to the frame. The use of substitute materials is prohibited; use only part EF4i-062.
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 gold if not removed before
operating the pellet heater.
Routine Cleaning and Maintenance