Enviro EF THERMO EF THERMO 28 User manual

PELLET STOVE
EF THERMO 28
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
TECHNICAL MANUAL

SHERWOOD INDUSTRIES IS AN ENVIRONMENTALLY RESPONSIBLE COMPANY. THIS MANUAL IS PRINTED ON RECYCLED PAPER.
50-878

Table of Contents
2
Introduction........................................................................................3
Rating Label Location................................................................3
Important Safety Data...............................................................3
Safety Warnings And Recommendations.....................................3
Specifications......................................................................................5
EF Thermo Data.......................................................................5
Rating Label Location................................................................6
Appliance Dimensions...............................................................6
Safety Devices..........................................................................7
Installation..........................................................................................9
Deciding Where to Locate your Pellet Appliance..........................9
Removing Your New Stove From the Pallet..................................9
Slider/Damper Operation...........................................................9
Vent Termination Requirements................................................10
Clearances to Combustibles.....................................................11
Alcove Clearances...................................................................11
Water Line Schematic..............................................................12
Horizontal Through Wall Installation.........................................13
Through Wall Installation.........................................................14
Inside Vertical Installation.......................................................15
Outside Vertical Installation.....................................................16
Thermostat Installed...............................................................17
Mobile Home Installation.........................................................17
Fresh-Air Connections.............................................................17
Troubleshooting.................................................................................18
Wiring Diagram..................................................................................21
Parts List...........................................................................................22
Parts Diagram - Components..............................................................23
Parts Diagram - Body.........................................................................24
Warranty...........................................................................................25
Installation Data Sheet.......................................................................26

3
Introduction
RATING LABEL LOCATION:
The rating label is located on the hopper lid.
IMPORTANT SAFETY DATA:
Please read this entire Owner’s Manual before installing or operating this 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.
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.

4
Introduction
Electrical: THE USE OF A SURGE PROTECTED POWER BAR IS RECOMMENDED.
The maximum power requirement is 800 watts (3.3 amp). The stove has a grounded electrical cord
and should be connected to a standard 220-240 volt, 50 Hz grounded electrical outlet. Make sure the
electrical cord is not trapped under the appliance and that it is clear of any hot surfaces or sharp edges.
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 in accordance with applicable local, state or federal codes.
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.
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
Specifications
EF THERMO DATA:
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%
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
Table 1