SHERWOOD INDUSTRIES IS AN ENVIRONMENTALLY RESPONSIBLE COMPANY. THIS MANUAL IS PRINTED ON RECYCLED PAPER. PLEASE KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE PELLET STOVE EF THERMO 28 TECHNICAL MANUAL ���� 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.
Table of Contents Introduction........................................................................................3 Rating Label Location................................................................3 Important Safety Data...............................................................3 Safety Warnings And Recommendations.....................................3 Specifications......................................................................................5 EF Thermo Data.............................
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.
Introduction 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. Electrical: THE USE OF A SURGE PROTECTED POWER BAR IS RECOMMENDED. The maximum power requirement is 800 watts (3.3 amp).
Specifications EF THERMO DATA: Necessary draught 34.8 Pa (0.348 mbar) Mass of Appliance 157 Kg Minimum required load bearing capacity of the floor 247 Kg 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.
Specifications APPLIANCE DIMENSIONS: UNIT DIMENSIONS HEIGHT: 37 3⁄8” (949 mm) WIDTH: 25 1⁄4” (641 mm) DEPTH: 25 7/16” (646 mm) 37 3/8" (94.9cm) HEARTH PAD: WIDTH: 25 1⁄4” (641 mm) DEPTH: 31 3/16” (793 mm) [6” (152.4 mm) in front of unit] 25 7/16" (64.6cm) 25 1/4" (64.
Specifications SAFETY DEVICES: Air Bleeder Valve (shown in Figure 3): Located under unit top of the unit. To remove the top follow these steps (refer to Figure 4): 1. Open hopper lid and remove the two (2) screws at the front. 2. Loosen the two (2) screws at the back of the top. 3. Remove top. 4. Replace the top by using the reverse of the method used to remove it. ��� ������� ����� Refer to Figure 5 and 6 for the following safety devices. See next page to remove cabinet sides.
Specifications To remove the cabinet sides, follow these steps: 1. Loosen the three (3) screws from both sides on the back of the appliance (see Figure 7). 2. Remove the ash drawer cover (see Figure 8). 3. Remove the four (4) screws, two on each side, under the ash drawer holding the cabinet sides on (see Figure 9). 4. Slide cabinet side forward and out. 5. Replace cabinet sides by using the reverse of the method used to remove them. 6. Replace the ash pan cover.
Installation All local regulations, including those referring to national and European Standards need to be complied with when installing this appliance. DECIDING WHERE TO LOCATE YOUR PELLET APPLIANCE: 1. Check clearances to combustibles to the unit and for the venting as per the pellet vent manufacturer’s installation instructions. 2. Do not obtain combustion air from an attic, garage or any unventilated space. Combustion air may be obtained from a ventilated crawlspace. 3.
Installation INSTALLATION OF EXPANSION TANK: The expansion tank MUST be installed before this unit can be used. 1. Remove the expansion tank from the box located in the hopper. 2. Loosen the four (4) screws pointed out in Figure 11. Lift the back grill up and remove it from the unit. 3. Apply thread sealant to the fitting point out in Figure 12 then tighten the expansion tank onto the fitting.
Installation G K E D F B Opens G Opens B A Termination Cap Air Supply Inlet G C I Opens G Gas Meter Restriction Zone L H (Termination not allowed) Figure 13 1. Do not terminate the vent in any enclosed or semi-enclosed areas such as a carport, garage, attic, crawlspace, narrow walkway, closely fenced area, under a sundeck or porch, or any location that can build up a concentration of fumes such as stairwells, covered breezeway, etc. 2.
Installation CLEARANCES TO COMBUSTIBLES: C B A Floor Protection Figure 14 This unit can be installed on a combustible floor due to the built in pedestal hearth pad (for example linoleum, hardwood flooring). If combustible flooring is underneath the unit 6 inches (153 mm) on either side and to the front must be protected by non-combustible material. If this unit is to be installed onto a carpeted surface, a hearth pad must be used for stability.
Installation WATER LINE SCHEMATIC: EF Thermo 28 Expansion Tank Heater Pump Valve Pressure Relief Valve Hot Cold Supply Shut-Off Valve Hot Water Tank Check Valve Pressure Regulator Radiator Radiator Supply The heating system for this unit must be engineered to accommodate the output of the unit. All pipes must be installed by a licensed plumber.
Installation HORIZONTAL THROUGH WALL INSTALLATION: The ENVIRO EF THERMO can be vented by a couple of different methods. 1. NOTE: Use only listed type “PL” or “L” pellet venting products. Failure to use listed components may cause damage or personal injury or death. 2. Choose a location for your stove that meets the requirements stated in this manual and allows installation with the least amount of interference to house framing, plumbing, wiring, etc. 3.
Installation THROUGH WALL INSTALLATION: Fresh-Air Intake 1” (25mm) Wall thimble manufactured by pellet vent manufacturer. 1” (25mm) 6” (150mm) Floor Protection Figure 17 1” (2.5cm) Wall Thimble 45° Elbow 6” (15.2cm) Non-combustible Floor Protection 12” (30.
Installation INSIDE VERTICAL INSTALLATION: 1. Choose a stove location that is ideal. See the section Deciding Where to Locate Your Pellet Appliance. 2. Place a non-combustible hearth pad where necessary. 3. Place the unit on the hearth pad and space it in a manner so when the pellet vent is installed vertically, it will be 3” (76 mm) away from a combustible wall. 4. Locate the center of the fresh air intake pipe on the unit.
Installation OUTSIDE VERTICAL INSTALLATION: To accomplish an outside vertical installation, follow steps 1 through 9 in the Inside Vertical Installation section and then finish it by performing the following: 10. Install a tee with clean out on the outside of the house. 11. Install PL vent upward from the tee. Make sure that you install support brackets to keep the vent straight and secure. 12. Secure the flashing as you go through the roof. 13.
Installation THERMOSTAT INSTALLED: A) HI / LOW: When the jumper is placed on only one of the J9 pins, then the control board is in a HI / LOW mode of thermostat operation (factory setting). B) ON / OFF: If both pins of J9 are jumped (covered), the control board is in an ON / OFF mode of thermostat operation .
Troubleshooting DO NOT: • Hold the ON / OFF BUTTON; this is a momentary contact switch and can be damaged if held down too long. • Service the stove with wet hands. The stove is an electrical appliance, which may pose a shock hazard if handled improperly. Only qualified technicians should deal with possible internal electrical failures. • Do not remove any screws in the firebox without first lubricating them with penetrating oil. WHAT TO DO IF: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. The stove will not start.
Troubleshooting 3. The exhaust motor will not function normally. üOpen the left side access panel; check all connections against the wiring diagram. üContact your local dealer for service. 4. The convection blower will not function normally. «Clean all grill openings at the back and below unit. «Press the fan button. Does the fan come on? Press again to verify that the blower turns on; if not, contact your local dealer for service. 5. Ignitor- the pellets will not light.
Troubleshooting «Contact your local Dealer for service. «Turn the Heat Level up slightly (poor quality pellets will require slightly higher settings). If the stove goes out and there are no pellets in the liner, the auger is stopping. üSee “The auger motor will not function normally” and “The exhaust blower will not function normally.” 10. The #2 light is flashing. (see #8 in Figure 23) «The water temperature high limit switch has tripped. Remove right cabinet side and manually reset the high limit switch.
Wiring Diagram 200 °F 93 °C HIGH LIMIT WATER TEMPERATURE SENSOR LOWER PRESSURE SENSOR GREY GREY GREY GREY BLUE COMBUSTION BLOWER WHITE BROWN POWER CORD 120°F 49°C EXHAUST TEMPERATURE SENSOR BROWN BLACK RED BLACK WHITE GROUND J2 LIGHT BLUE IGNITOR COMMON BLACK BROWN HOT 5 A FUSES BLACK THERMOSTAT 5 VDC 120°F 49°C SENSOR RED PURPLE Pump WHITE WHITE CONVECTION BLOWER PURPLE WHITE AUGER MOTOR VACUUM SWITCH BLACK YELLOW WHITE WHITE ORANGE ORANGE PURPLE BLUE YELLOW RED GREY GREY
Parts List Reference Number Part Description Part Number 1 120°F (49°C) exhaust temperature sensor EC-001 2 Vacuum switch - 220V 3 Auger Brass Bushings (Set Of 2) 4 Hardened Bushing 20-020 5 Tube cleaner rod 50-680 6 300 Watt Ignitor - 220V 50-829 DIN Owner’s Manual 50-877 DIN Technical Manual 50-878 7 Circuit board - 220V 50-1015 8 Auger Motor-3RPM-220V 50-1024 9 Convection Blower - 220V 50-1025 10 Water Pump 50-1026 EF-017-220V EF4i-065 11 Low Pressure Switch 50-1027
�� �� July 2005 � �� �� � EF Thermo 28 - Components �� �� �� � � � �� � � �� � �� Parts Diagram - Components
Parts Diagram - Body EF Thermo 28 - Steel Components �� June 2005 � �� �� �� �� �� �� � �� �� �� �� �� �� �� �� �� �� �� 25
Warranty Sherwood Industries Ltd. gives a five year limited warranty on all steel manufactured parts. A one-year warranty is provided on all electrical components. The above limited warranties are extended only to the original purchaser. There is no warranty on the following parts: ● Glass window ● Fiberglass rope gaskets ● refractory material ● burn pot liner ● paint ● enamel finish or gold plating where it applies ● vacuum hose. **NOTE: The paint on the brick firebox lining may peel.
Installation Data Sheet The following information must be recorded by the installer for warranty purposes and future reference.
