Enviro EF THERMO User manual

PELLET STOVE
EF THERMO
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.
PLEASE KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE
OWNER’S MANUAL

SHERWOOD INDUSTRIES IS AN ENVIRONMENTALLY RESPONSIBLE COMPANY. THIS MANUAL IS PRINTED ON RECYCLED PAPER.
50-877

Table of Contents
2
Introduction........................................................................................3
Important Safety Data...............................................................3
Water Specifications..................................................................4
Pellet Quality............................................................................4
Warnings and Recommendations...............................................5
Water Safety Features of Your Pellet Stove.................................5
Rating Label Location................................................................6
Appliance Dimensions...............................................................6
Operating Instructions..........................................................................7
Control Board Functions............................................................7
Turning Pellet Stove On.............................................................7
Turning Off Your Pellet Stove.....................................................8
Slider/Damper Operation...........................................................8
Routine Cleaning and Maintenance.....................................................9
Warranty...........................................................................................12
Installation Data Sheet.......................................................................13

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.
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.
Contact local building officials about restrictions and installation inspection requirements in your area.
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 use of grates or other methods of supporting the fuel is not permitted.
This unit is designed to burn pelletized wood fuel only. Do not use any other type of fuel, this will void
any warranties stated in this manual.
THE USE OF CORDWOOD IS PROHIBITED BY LAW.
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.
It is advisable to clean the exhaust vent bi-annually or every two tons of pellets.
The grounded electrical cord should be connected to a standard 220-240 volts, 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 680 Watts. (3.2 Amps).
Soot or creosote may accumulate when the stove is operated under incorrect conditions such as an
extremely rich burn (black tipped, lazy orange flames).
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.
Be sure to maintain the structural integrity of the home when passing a vent through walls, ceilings, or
roofs.
The ash pan and viewing door must be locked securely for proper and safe operation of the pellet
stove.
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, we grant no warranty
implied or stated for the installation or maintenance of your stove. Therefore, Sherwood Industries Ltd.
assumes no responsibility for any consequential damage.
Introduction
IMPORTANT SAFETY DATA:
3

4
PELLET QUALITY:
PELLET QUALITY IS IMPORTANT, PLEASE READ THE FOLLOWING PAGE.
Your pellet stove has been designed to burn wood pellets only. Since there are many manufacturers of
wood pellets, it is important to select pellets that are free of dirt or any impurities. Ask your dealer for a
recommended pellet type.
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 DIFFER,
SO WILL THE PERFORMANCE AND HEAT OUTPUT OF THE PELLET STOVE.
Since Sherwood Industries Ltd. has no control over the quality of pellets that you use, we assume no
liability caused by the quality of wood pellets used.
Check the burn-pot liner periodically to ensure that the holes are not blocked with clinkers, (clinkers are
silica in the fuel that form a hard mass during the burning process). If they are blocked, remove the liner
(when the unit is cold) and clean the clinkers out. The liner should be cleaned or scraped once every 2-3
days depending on wood pellet quality. Clean the holes in the lines with a small pointed object.
Store pellets at least 36” (1 m) away from the pellet stove.
WATER SPECIFICATIONS:
Introduction
Necessary draught 34.8 Pa (0.348 mbar)
Water content 17.3 liters
Exhaust gas temperature at nominal heat output 230°C
Exhaust gas temperature at minimum heat output 120°C
Exhaust mass flow at nominal heat output 7.5 g/s
Exhaust mass flow at minimum heat output 8.0 g/s
Flue pipe diameter 80 mm
Nominal heat output 25 kW
Heat output range 2.5 kW - 25 kW
Combustion period at QN12 hours
Setting range for the temperature controller 30°C - 75°C
Fuel (type, size, water content) Wood pellets, 6 mm dia. maximum, <8%wc
Hopper capacity 77.75 liters (55 Kg)
Hopper filing opening 440 mm x 320 mm
Auxiliary power requirements 800 W
Test pressure 4.5 bar
Operating pressure 0.5 bar - 2.5 bar
Maximum water pressure 3.0 bar
Maximum water temperature 90°C
Burn Rate 1.0 - 4.5 Kg/hr

5
WARNINGS AND RECOMMENDATIONS:
A. Do not abuse the glass by striking or slamming the door shut.
B. Do not attempt to operate the stove with broken glass.
C. Do not attempt to open the door and clean the glass while the unit is in operation. 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.
D. Do not use abrasive cleaners to clean the surface or any part of the stove.
E. It is recommended that the unit be secured into its’ position in order to avoid any displacement.
F. Never use gasoline, gasoline-type lantern fuel, kerosene, or similar liquids to start the fire. Keep all
such liquids well away from the pellet stove while it is in use.
G. 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.
H. Make sure the ash pan is closed tightly during the operation of the stove.
I. Fresh air intake is strongly recommended. Failure to install intake air may result in the unit smoking
during power failures as well as improper combustion.
J. Do not operate at water pressure below 0.5 bar.
NOTE: Fresh air is mandatory on all units installed in “Mobile Homes” and “Air Tight” homes.
KEEP ASH PAN FREE OF RAW FUEL. DO NOT PLACE UNBURNED OR NEW PELLET FUEL IN
ASH PAN. A fire in the ash pan could be the result.
In the event of a malfunction, turn the water heater feed OFF. Push the ON/OFF button
located on the control panel. Have the water heater inspected and serviced by a qualified
service technician.
- Have your unit and venting checked/cleaned/serviced annually by a qualified service technician
to prevent excess build-up of dangerous creosote deposits as well as to ensure proper
operation and efficiency of this appliance.
Introduction

6
APPLIANCE DIMENSIONS:
RATING LABEL LOCATION:
The rating label is located on the hopper lid.
37 3/8"
(94.9cm)
25 7/16"
(64.6cm) 25 1/4"
(64.1cm)





 

 



 

 



 

  
  

 

 
 
Introduction
Figure 1
Figure 2
UNIT DIMENSIONS
HEIGHT: 37 ” (968.9 mm)
WIDTH: 25 ” (641.0 mm)
DEPTH: 25 ” (623.7 mm)
HEARTH PAD:
WIDTH: 25  (641.0 mm)
DEPTH: 31 ” (776.3 mm)
[6” (152.4 mm) in front of unit]

7
 

 

 



















CONTROL BOARD FUNCTIONS:
1. WATER TEMPERATURE DIAL: Read in degrees Celsius
2. AUGER TRIM
3. CONVECTION BLOWER CONTROL
4. AUGER PULSE LIGHT: Light flashes in conjunction with the
auger.
5. 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.
6. SYSTEM LIGHT: If flashing, the board is under control. If
the light is solid, setting can be altered.
7. ON/OFF BUTTON
8. HEAT OUTPUT INDICATOR: Shows the present heat
output setting.
9. HEAT LEVEL ADJUSTMENT: When pressed, will change
the heat setting of the unit from low to high.
TURNING PELLET STOVE ON:
Ensure the hopper has sufficient fuel or pellets to start the unit.
1. Set water temperature, using the rotary dial located above the feed controls.
2. Press the ON / OFF button (6) to start the appliance. System light (5) will flash, auger light (3) will
flash with the pulse of the auger, heat level indicator will show with no control until the system light
becomes solid.
3. If this is the first time the unit has been started or the unit has run out of fuel, press the Manual Auger
Feed button (4) and hold down for 60 seconds. This will help “prime the auger,” deliver fuel to the
burn pot, and help light the unit more quickly.
4. When a fire has been established, the system light will become solid and the auger light will continue
to flash. The heat output button (8) can be pressed to achieve the desired heat setting.
Operating Instructions
Figure 3

8
SLIDER/DAMPER OPERATION:
This is used to regulate the airflow through the pellet
stove.
• On the low heat output settings, push the slider all the
way in.
• On the high heat output pull the slider out or until a good
fire is achieved. A good fire is in between a fire with lazy,
flames black tipped flames and a forced fire (very quick,
shorter flames). A good fire is the most efficient and will
have a bright and active flame.
• Slider should be set at a hot magnetic reading of 0.14”
WC (34 Pa) for firebox vacuum.
5. The convection blower (room air blower) will be on, the speed of this blower is controlled by the
setting set on the heat output indicator. The convection blower can be turned OFF by depressing the
convection blower control button (2). When the unit reaches 160° F (71°C), the convection blower will
come ON, cooling the unit. It is recommended that the convection blower be left on at all times.
6. When unit is operating on LOW the unit can be adjusted for poorer quality fuels. By depressing the
Auger Trim button (1), WHEN THE UNIT IS ON LOW, the ON time the auger pulses can be changed
from 2 seconds ON to 4 seconds ON.
AUGER TRIM
AUGER TRIM
AUGER TRIM
2 SECONDS
“ON”
3 SECONDS
“ON” Factory
Setting
4 SECONDS
“ON”
To turn the unit OFF, simply press the ON / OFF button. All LED lights will go out. This will stop the feed
of pellets. The blowers will continue to operate and cool the stove. When cool enough, the stove will shut
down.
NOTE: During the 15 minute start-up sequence the stove can not be turned off by turning the water
temperature dial down. If the dial is turned down, the stove will run through its complete start-up
sequence and shut down after the stove has lit. The unit can be shut-off manually by pressing the ON/
OFF button.
Operating Instructions
TURNING OFF YOUR PELLET STOVE:
Figure 4


 
Figure 5
These settings can be used if the unit does not
keep a fire going on low (poor quality fuel).
These settings could also be used if the low
setting is too hot or cold for the surrounding
area.
7. Set water and/or room thermostats to desired
temperature(s).

9
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:
ASH REMOVAL:
CAUTION WHEN VACUUMING FLY ASH: BECAUSE THE FLY ASH IS VERY FINE, THE USE OF
A FINE FILTER 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.
Routine Cleaning and Maintenance
Figure 6
TOOLS REQUIRED TO CLEAN UNIT:
Torx T-20 Screwdriver, 5/16” wrench or
socket, 75 mm and 50 mm Brush, Soft
Cloth, Vacuum with fine filter bag.
ASH PAN AND DOOR GASKETS
After excessive use, the gasketing may
come loose. To repair this, glue the gasketing on using high-
temperature fiberglass gasket glue available from your local
dealer. This is important to maintain an airtight assembly. DO NOT
PLACE UNBURNED OR RAW PELLET FUEL IN ASH PAN.
ABOVE HEAT EXCHANGER TUBES:
There is a tube cleaner rod at the front of the unit (shown in Figure
6). When the stove is off, pull the rod in and out to remove the ash
build up above the heat exchanger tubes.
BURNER POT AND LINER
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 burn-pot. 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. Push the liner up against the ignitor tube.
To remove the burn pot and burn pot liner, open the door. 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.
2-3 DAYS/WEEKLY  SEASON or 1 TON OF FUEL
Ash Pan and Door Gaskets Exhaust Vent
Above Heat Exchanger Tubes Fresh Air Intake Tube
Burn Pot and Liner Blower Mechanisms
Ash Pan Inside Heat Exchanger Tubes
Door Glass Internal exhaust Box
Inside Firebox All Hinges
Door Latch
Burn pot
liner
Fresh
air tube Ignitor
tube
Burn
pot
Figure 7

10
DOOR GLASS
It is recommended that your dealer replace the glass if broken.
The door glass is made of 5 mm thick, high temperature PYROCERAMIC. The center panel is 229 mm x
330 mm (9” x 13”). 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.
FRESH AIR INTAKE
Inspect periodically to be sure that it is not clogged with any foreign materials.
INSIDE FIREBOX
For bi-weekly clean out, ash may be removed from the heat exchange tube by cleaning with a 50mm
round brush.
EXHAUST VENT
Soot and Fly-ash: Formation and Need for Removal - The products of combustion will contain
small particles of fly-ash. The fly-ash 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.
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.
Routine Cleaning and Maintenance
ASH DRAWER:
Remove ash drawer (see Figure 8). 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.
DO NOT PLACE UNBURNED OR RAW PELLET FUEL IN
ASH PAN.
BLOWER MECHANISMS:
Unplug the stove then open the right/left side panels to
access the two blowers. Clean debris from guards DO NOT
lubricate the motors.
 
  
Figure 8