Sherwood Enviro Service Manual
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Sherwood Enviro Service Manual

Sherwood Enviro Service Manual

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FOR INSTALLERS AND SERVICE TECHNICIANS ONLY
PELLET
STOVE
SERVICE
MANUAL
Sherwood Industries Ltd. Duplication of this document is prohibited. All rights reserved.
August 2003
C-10097

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  • Page 1 FOR INSTALLERS AND SERVICE TECHNICIANS ONLY PELLET STOVE SERVICE MANUAL Sherwood Industries Ltd. Duplication of this document is prohibited. All rights reserved. August 2003 C-10097...

  • Page 2: Table Of Contents

    This is a service guide designed by SHERWOOD INDUSTRIES LTD. We hope this manual will assist you to identify and correct operational concerns you might experience in all ENVIROFIRE pellet stoves. This service guide is designed for SERVICE TECHNICIANS AND INSTALLERS ONLY.

  • Page 3: Timer Control

    Attempt to by pass the start up switch with a jumper wire Replace the switch. between the red and white wires. Plug the stove back Starts into wall outlet. Replace the start up timer. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 1...

  • Page 4: Stove Will Not Operate When Hot

    Apply direct power to the exhaust blower with a test cord, by Replace the blower removing the two leads and motor. plugging the motor in directly. Does not run EF-4, 5 Replace the phase controller. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 2...

  • Page 5: The Convection Blower Will Not Function Properly

    If the blower shuts off replace the 160° F (71°C) fan temperature sensor. If the motor is still running on high, replace the fan controller. If the fan has a low pitched Replace the fan controller. rumble. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 3...
  • Page 6 Applying direct power to the convection blower. Bypassing the 200°F 93°C manual reset temperature sensor. Applying direct power to the auger motor. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 4...

  • Page 7: The Auger Motor Does Not Function Properly

    BUTTON IN. has not been tripped. By pass the 200° F (93°C) Replace the200° F (93°C) temperature sensor with a temperature sensor. jumper wire. See previous page. If it works CONTINUED ON NEXT PAGE SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 5...
  • Page 8 Using a multimeter test the dial-a-fire, the values from this test should be between 68k and 850k Replace the Dial A Fire. plus or minus 10%. If all these procedures are O.K. replace the auger- timing module SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 6...
  • Page 9 Checking the auger timing control module. Bypassing the vacuum switch. Testing the exhaust vacuum. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 7...

  • Page 10: Dial-A-Fire Has No Effect On The Fire

    High fire 71-73k ohms. leads into the leads of the potentiometer. Remove leads from the timing control. EF 4 Low-Fire 800-900k ohms. High fire 36.5k ohms. Replace the potentiometer or dial-a-fire. Rear of the control panel. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 8...

  • Page 11: The Stove Will Not Shut Down

    With one of the brown replace the auto/manual wires from the exhaust temperature sensor switch. disconnected. EF-2 If the unit did not shut down replace the wiring Remove the gray wire harness. from the auto/ manual switch. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 9...

  • Page 12: Circuit Board

    Once the 120 °F (49 °C) exhaust temperature sensor closes, the Convection blower will come on. 15 minutes after pushing the start button, the On/Off light changes to solid. This signals that the unit is at operating temperature. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 10...

  • Page 13: Hi/Lo Mode, With Thermostat Or Wall Switch

    The ON/OFF lights starts to flash after the vacuum sensor has closed (approx. 15 seconds). Auger light flashes: - 3 seconds ON. - 8 seconds OFF. The combustion blower comes on at full speed. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 11...
  • Page 14 NORMAL OPERATION Thermostat contacts are closed. The ON/OFF light is solid. Operator can now set; heat output, low feed trim and convection blower ON/OFF (combustion blower, convection blower and heat output all change together.) SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 12...

  • Page 15: On/Off Mode, With Thermostat Or Wall Switch

    Auger stops feeding. Combustion blower goes to full speed until exhaust sensor opens and blower stops. The ON/OFF light will continue to flash (unless power is disconnected). 3) ON/OFF Mode, With Thermostat or Wall Switch SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 13...
  • Page 16 If the thermostat contacts are opened during start up the circuit board and all motors turn OFF and the ON/OFF light remains flashing. START-UP SEQUENCE (15 minutes) Thermostat contacts open when the ON/OFF button is pushed. The circuit board will not turn on. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 14...
  • Page 17 If you push ON/OFF button the circuit board will go through a start-up sequence (see start-up section above). SHUT DOWN Thermostat contacts are open. All lights turn off. Auger stops feeding. Combustion blower goes to full speed until exhaust sensor opens and blower stops. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 15...

  • Page 18: Circuit Board Controls

    CAUTION: The use of the thermostats with timers may result in the unit shutting off during start-up. This may allow smoke to enter the house through the air wash system. Jumper pins J9 Jumper pins in the HI / LOW J9 in the ON / mode OFF mode SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 16...

  • Page 19: Light #2 On Heat Output Bar Flashing

    If it does, install fresh air intake to unit or room. Venting system may require vertical section to move termination into a low- pressure zone. CONTINUED ON NEXT PAGE SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 17...

  • Page 20: Light #3 On Heat Output Bar Flashing

    Magnahelic gauge (readings must be above .10” W.C. on low fire). If the motor fails to reach a 0.10” w.c. reading, then replace the combustion blower (part# 50-473). SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 18...
  • Page 21 Fuel may build up and smother the fire. (NOTE: unit may require a change to the vent system or installation of fresh air to correct Air to Fuel ratio problems). CONTINUED ON NEXT PAGE SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 19...
  • Page 22 If the motor fails to reach a 0.10” w.c. reading, then replace the Combustion Blower (part# 50-473). Poor quality fuel. Insufficient energy in the fuel to produce enough heat to keep the stove burning or operational. CONTINUED ON NEXT PAGE SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 20...

  • Page 23: Auger Light Flashes But Auger Motor Does Not Turn At All

    Try to break apart jam by poking at the jam through the drop tube. If this fails then empty the hopper and remove the auger cover **Remember to re-seal the cover after installation** SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 21...

  • Page 24: General

    If it does not come to the Remove the burn pot and right color, replace the the burn pot liner and look into the ignitor tube. ignitor. THE COLOR OF THE IGNITOR SHOULD BE BRIGHT ORANGE. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 22...

  • Page 25: The Stove Keeps Going Out

    (REFER TO #3 and #5 in the dial-a-fire section of Did the power go out? this manual). If the auger is stopping (refer sections #5 in the dial-a-fire section of this manual). SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 23...

  • Page 26: Components Of Apellet Stove

    This starts the stove in the manual position, when the green light comes on push the switch to the auto position. 120°F(49°C) N/C IGNITER TEMPERATURE SENSOR this sensor (mounted on the exhaust channel) will turn the igniter OFF when the exhaust temperature reaches 120°F(49°C) SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 24...
  • Page 27 The EF 4 has a phase controller which is responsible for reducing the speed of the Combustion/Exhaust blower as the Dial-A-Fire is turn down to a lower flame setting, this will decrease the air flow through the appliance helping the stove run more efficiently. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 25...

  • Page 28: Flame Characteristics

    FLAME CHARACTERISTICS SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 26...

  • Page 29: Wiring Diagrams

    EF 2 WIRING DIAGRAM SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 27...
  • Page 30 EF 3 Bay i WIRING DIAGRAM SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 28...
  • Page 31 EF 2-3 WIRING DIAGRAM (THERMOSTAT INTERFACE) SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 29...
  • Page 32 EF 4 WIRING DIAGRAM (THERMOSTAT INTERFACE) SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 30...
  • Page 33 EF 4 WIRING DIAGRAM SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 31...
  • Page 34 EF 5 WIRING DIAGRAM – Dial-a-Fire SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 32...
  • Page 35 BLOWER ORANGE SENSOR ORANGE PURPLE PURPLE CONVECTION BLUE WHITE BLOWER YELLOW GREY GREY YELLOW AUGER BROWN WHITE MOTOR BROWN 200 DEG F 93 DEG C ORANGE HIGH LIMIT CONNECT ORANGE THERMOSTAT TEMPERATURE SENSOR HERE SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 33...
  • Page 36 BLOWER ORANGE SENSOR ORANGE PURPLE PURPLE CONVECTION WHITE BLUE BLOWER YELLOW GREY GREY YELLOW AUGER BROWN WHITE MOTOR BROWN 200 DEG F 93 DEG C ORANGE HIGH LIMIT CONNECT ORANGE TEMPERATURE THERMOSTAT HERE SENSOR SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 34...
  • Page 37 MERIDIAN WIRING DIAGRAM SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 35...

  • Page 38: 11) Glossary

    Lazy orange black tipping flames resulting in soot build up as well as the production of carbon monoxide. SLIDER DAMPER Is a device used to adjust the amount of air to the fire to achieve an efficient flame in the stove. SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 36...

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