Sherwood Enviro Service manual

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

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.

This guide is not to be used by the homeowner.

If after using this service manual and following our recommendations and the problem still excists, please do not hesitate to call our technical department.

Technical Division

Sherwood Industries Ltd.

TABLE OF CONTENTS PAGE

Timer Control………………………...…………………………………..……………………..…1

1) STOVE WILL NOT START………………………………..………………………………….1

2) STOVE WILL NOT OPERATE WHEN HOT…………………………….…..………………2

3) THE COMBUSTION (EXHAUST) BLOWER WILL NOT FUNCTION………………..….2

4) THE CONVECTION BLOWER WILL NOT FUNCTION PROPERLY…………………...3

5) THE AUGER MOTOR DOES NOT FUNCTION PROPERLY………………….………...5

6) DIAL-A-FIRE HAS NO EFFECT ON THE FIRE………………….……………….……….8

7) THE STOVE WILL NOT SHUT DOWN………………………………………….………….9

CIRCUIT BOARD…………………..…………………………………………………….……….10

1) MANUAL MODE, FACTORY SETTINGS, NO THERMOSTAT OR WALL SWITCH….10

2) HI/LO MODE, WITH THERMOSTAT OR WALL SWITCH………………………………..11

3) ON/OFF MODE, WITH THERMOSTAT OR WALL SWITCH…………………………..13

CIRCUIT BOARD CONTROLS………………………………………………………………….16

THERMOSTAT PIN SET-UP….……………………………………………………………….16

1) LIGHT #2 ON HEAT OUTPUT BAR FLASHING………………………………………...17

2) LIGHT #3 ON HEAT OUTPUT BAR FLASHING………………………………………...18

3) AUGER LIGHT FLASHES BUT AUGER MOTOR DOES NOT TURN AT ALL………..21

GENERAL………………………………………………………………………………………….22

1) THE IGNITOR DOES NOT WORK………………………………………………….……..22

2) THE STOVE KEEPS GOING OUT……………………………………………….………..23

COMPONENTS OF A PELLET STOVE………………………………………………………..24

FLAME CHARACTERISTICS……...……………………………………………………………26

WIRING DIAGRAMS……..……………………………………………………………………...27

GLOSSARY………………………………………………………………………………………..36

SUGGESTED TOOLS LIST

Cordless drill / Screwdriver

Multimeter

Magnehelic Pressure Gauge

Ratchet and Sockets: 1/4” to 5/8”

Open ended Wrenches: 1/4” to 1/2” Electrical Tape

Screwdrivers (T20 TORX) Robertson, Straight Blade

Wire Cutters, Strippers, Crimpers and Needle Nose Pliers

Penetrating Lubricant (WD-40)

High Temperature Silicone (RTV) 500 °F

1/4” Insulated connectors

SHERWOOD INDUSTRIES LTD. ENVIRO 2003

DIAL-A-FIRE

1) STOVE WILL NOT START

If not

Make sure that the stove is plugged in and the receptacle is supplying power.

Push the start up switch.

EF 2

Attempt to bypass the auto/manual switch with a jumper wire between the grey and black wires.

EF 3, 4, 5

Attempt to by pass the start up switch with a jumper wire between the red and white wires. Plug the stove back into wall outlet.

Plug the unit in or fix receptacle if necessary.

If not

Does not start

Check all wiring for damage and that all the wiring is correct against the wiring diagram.

Starts

Starts

Replace the switch.

Replace the switch.

Replace the start up timer.

SHERWOOD INDUSTRIES LTD. ENVIRO PAGE. 1

2) STOVE WILL NOT

OPERATE WHEN HOT

Unplug the stove; place a jumper wire across the two brown wires on the exhaust temperature sensor. Plug unit back in.

If Runs

EF-2

By pass the auto side of the switch with a jumper wire. Plug the unit back in, if it starts replace the switch.

Replace the sensor if necessary.

EF-2--120 °F (49°C)

EF-3--140 °F (60°C)

EF-4--120 °F (49°C)

EF-5--120 °F (49°C)

3) THE COMBUSTION

(EXHAUST) BLOWER

WILL NOT FUNCTION

Open the left side panel, check all connections and wiring against the wiring diagram.

Tap motor housing lightly this may loosen a tight motor.

Apply direct power to the exhaust blower with a test cord, by removing the two leads and plugging the motor in directly.

EF-4, 5

Replace the phase controller.

Does not run

SHERWOOD INDUSTRIES LTD. ENVIRO

Correct if necessary.

Replace the blower motor.

PAGE. 2

4) THE CONVECTION

BLOWER WILL NOT

FUNCTION PROPERLY

Check all the wires against the wiring diagram.

Apply direct power to the convection blower with a test cord.

See next page.

If the convection blower runs on high all the time.

Doesn’t run


Replace the blower.

Remove one of the wires from the 160 °F (71°C) temperature sensor.

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 rumble.

Replace the fan controller.


Applying direct power to th e convection blower .

Bypassing the 200 °F 93°C manual reset temperature sensor.

Applying direct power to the auger motor.


5) THE AUGER MOTOR

DOES NOT FUNCTION

PROPERLY

Make sure that the exhaust blower is operating correctly.

Make sure the dial-a-fire is turned to the “ON” position.

Check to make sure all wires are correct to the auger motor, dial-a-fire, vacuum sensor, 200 °F

(93 °C) temperature sensor and the timing control module.

Using a test cord apply direct power to the auger motor. See previous page.

Check the vacuum hose to make sure there are no cracks or breaks.

Check to make sure that the reset button on the

200 ° F (93°C) temperature has not been tripped.

Doesn’t run

If NO see section #3 in this manual.

Turn knob clockwise to the “ON“ position.


Replace the auger motor.

IF THIS SENSOR HAS

BEEN TRIPPED FIND THE

REASONS FOR THE

OVER HEATING

BEFORE PUSHING

BUTTON IN.

By pass the 200 ° F (93°C) temperature sensor with a jumper wire. See previous page.

If it works

CONTINUED ON NEXT PAGE


Replace the200 ° F (93°C) temperature sensor.

PAGE. 5

AUGER MOTOR DOES NOT FUNCTION PROPERLY

CONTINUED

Check the vacuum switch by placing a jumper wire between the two blue leads from the vacuum switch.

If the auger motor works make sure the exhaust motor is producing enough vacuum.

Using a Magnehelic pressure gauge, disconnect the vacuum hose from the exhaust channel, these reading should be greater than:

0.4” wc (EF 2-3).

0.2” wc (EF-4).

If not

The unit may require a thorough cleaning.

If thoroughly cleaned.

Replace the combustion exhaust blower.

If over

Replace the vacuum sensor.

Test the dial-a-fire; place a jumper wire across the

(2) two pins on the timing control module

Using a multimeter test the dial-a-fire, the values from this test should be between 68k and 850k plus or minus 10%.

If all these procedures are

O.K. replace the augertiming module

If the auger motor cycles very quickly, test the diala-fire.

Replace the Dial A Fire.


Checking the auger timing control module.

Bypassing the vacuum switch.

Testing the exhaust vacuum.


Test the dial-a-fire potentiometer resistance by placing the multimeter leads into the leads of the potentiometer.

Remove leads from the timing control.

6) DIAL-A- FIRE HAS NO

EFFECT ON THE FIRE

EF 2, 3, 5

Low fire 800-900k ohms.

High fire 71-73k ohms.

EF 4

Low-Fire 800-900k ohms.

High fire 36.5k ohms.

Replace the potentiometer or dial-a-fire.

Rear of the control panel.


7) THE STOVE WILL

NOT SHUT DOWN

Check all wiring to the exhaust temperature sensor, start-up switch and the start up timer.

EF 3, 4, 5

Disconnect one brown wire from the exhaust temperature sensor.

If the unit does not shut down test the switch.

The unit must be cold, unplug the unit and then plug it back in.

Open the right hand side panel. Remove the red wire from the 15 minute start up timer, unplug the unit and then plug the stove back in.


If the unit shuts down, replace the exhaust temperature sensor.

If the unit starts without pushing the start up switch, test the 15 minutes start up timer.

If the unit does not start replace the switch.

If the unit starts by itself replace the (15) fifteen minute timer.

EF-2

With one of the brown wires from the exhaust temperature sensor disconnected.

EF-2

Remove the gray wire from the auto/ manual switch.

If the unit shuts down replace the auto/manual switch.

If the unit did not shut down replace the wiring harness.


CIRCUIT BOARD

OPERATION

1) Manual Mode, Factory Settings, No

Thermostat or Wall Switch

START-UP SEQUENCE

(15 minutes)

Push the ON/OFF button to start.

The ON/OFF light turns on solid.

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.

The ignitor comes on.

The convection blower stays off.

The operator has no control over the start-up sequence. (The operator can press and hold the manual feed button to run the auger continuously. The operator can also pre-set the heat output setting for operation. When the unit reaches operating temperature the heat output will go to that setting.)

The unit should light after 5 to 12 minutes.

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.


Normal Operation

The operator can now set the heat output, low feed trim and whether the convection blower is ON or OFF. (Please note: when the heat output is changed, the combustion blower and convection blower speed change as well.)

Shut Down

Push the ON/OFF button to turn stove off.

All the lights will turn off.

The auger will stop feeding.

The combustion blower goes to full speed until the exhaust temperature sensor opens, stopping all motors

2) HI/LOW Mode, With Thermostat or

Wall Switch


(15 minutes)

Thermostat contacts closed at time of start-up.



The ON/OFF lights starts to flash after the vacuum sensor has closed (approx. 15 seconds).


- 3 seconds ON.




START-UP SEQUENCE CONT.





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.

Note: The circuit board can only be turned OFF during start-up if vacuum has been established and the thermostat contacts are closed. The ON/OFF light will continue flashing


(15 minutes)

Thermostat contacts open at time of start-up.

Same as “START-UP SEQUENCE (15 minutes)

Thermostat contacts closed at time of start-up.”

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.)



Thermostat contacts are open.

The ON/OFF light starts flashing.

All functions drop to LOW speed (combustion blower speed, convection blower speed and heat output all change to LOW together.)

Operator has no control over the heat output, but can control the low feed trim and convection blower ON/OFF.

SHUT DOWN


Push ON/OFF button to turn stove off.

All lights turn off.

Auger stops feeding.

Combustion blower goes to full speed until exhaust sensor opens and blower stops.

SHUT DOWN


Push ON/OFF button to turn stove off.

The ON/OFF light continues to flash.



The ON/OFF light will continue to flash (unless power is disconnected).

3) ON/OFF Mode, With Thermostat or

Wall Switch



(15 minutes)

Thermostat contacts closed at time of start-up.



The ON/OFF lights starts to flash after the vacuum sensor has closed (approx.

15 seconds).


- 3 seconds ON.







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.

If the thermostat contacts are opened during start up the circuit board and all motors turn OFF and the ON/OFF light remains flashing.


(15 minutes)

Thermostat contacts open when the ON/OFF button is pushed.

The circuit board will not turn on.




Unit starts the start-up sequence.

After 15 minutes start-up, operator can set; heat output, low feed trim and convection blower ON/OFF (combustion blower, convection blower and heat output all change together).



The ON/OFF light starts flashing.

All functions drop to LOW speed (combustion blower speed, convection blower speed and heat output all change to LOW together).

Operator has no control over the heat output, but can control the low feed trim and convection blower ON/OFF.

SHUT DOWN


Stove will not shut off.

If you push ON/OFF button the circuit board will go through a start-up sequence (see start-up section above).

SHUT DOWN


All lights turn off.




CIRCUIT BOARD CONTROLS

HEAT LEVEL (OUTPUT) LIGHTS – shows the heat setting that the stove is operating in. lowest setting is at the bottom.

HEAT LEVEL SWITCH – press this button to set the heat level. The light will scale up through the range then back to the lowest.

AUGER TRIM SWITCH – Press this button to choose between three different ON times when the heat output in the low setting. Only the bottom heat level light on shows that the on time is set at 3 seconds ON (factory setting). Push the switch and the lights change to the bottom and the top light being on, this means the auger ON time has been increased to 4 seconds. Push the button again and the lights change to the bottom and the second from the top position. The auger ON time is now 2 seconds.

CONVECTION FAN SWITCH – press this switch to turn the convection blower OFF, press again to turn the blower on to the preset speed that corresponds to the heat level.

MANUAL FEED SWITCH – hold this button down to manually run the auger continuously. The auger returns to automatic when the switch is released.

ON/OFF SWITCH – push this switch to start or stop the unit when the unit is operating in “manual” or HI/LOW thermostat mode (ON/OFF is automatic once the stove has been started once).

THERMOSTAT PIN SET-UP

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 ithe HI / LOW mode

Jumper pins

9

OFF mode


CIRCUIT BOARD

1) LIGHT #2 ON HEAT

OUTPUT BAR FLASHING

If light #2 on the heat output bar is flashing, the vacuum switch contacts have been open for more than 15 seconds.

Possible causes:

Pinch, break or blockage in vacuum hose.

Check hose for pinch points or damage. Replace or reroute as required, blow out vacuum hose.

Blocked hose barb on exhaust channel.

Use a paper clip to clean out hose barb or remove the vacuum hose from the vacuum switch and blow into the hose to remove blockage.

To prevent further build up install, the Windsor Hose

Barb Shield (part# 50-472).

Blocked exhaust/venting system.

Severe negative pressure in area where unit is installed.



Have stove and venting cleaned and inspected.

Check the operation by opening a window.

Does this solve the problem?

I f it does, install fresh air intake to unit or room.

V enting system may requir e vertical section to move termination into a lowpressure zone.

PAGE. 17

LIGHT #2 ON HEAT OUTPUT BAR FLASHING CONTINUED

Vacuum switch failure.

Bypass the vacuum switch, if this corrects the problem check for above problems before replacing the vacuum switch.

Damage to gray wires between circuit board and vacuum switch.

Inspect wires and connectors.

Combustion blower failure.

The combustion blower is not turning fast enough to generate the proper vacuum in the exhaust channel.

Visual check – is the blower motor turning?

Check the exhaust blower voltage across the blower wires (≥114V on #5 setting and ≥82V on #1 setting).

Replace the circuit board if the voltage reading is less than 82V with a line voltage

>115vac.


Check vacuum levels in the exhaust channel by bypassing the vacuum switch, and then remove the vacuum hose from vacuum switch. Check exhaust vacuum readings by placing the open end of the vacuum hose on a 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).

PAGE. 18

2) LIGHT #3 ON HEAT

OUTPUT BAR FLASHING

If light #3 on the heat output bar is flashing, the exhaust temperature sensor contacts have opened.


Fire has gone out.


Check the hopper for fuel level.

Fill if required.

The air damper setting is incorrect.

Excessive air may consume the fire to quickly before the next drop of fuel. Leaving completely unburned fuel in the burn pot liner.

Insufficient air will cause build up, further restricting the airflow through the burn pot liner. This in turn will cause the fuel to burn cold and very slowly. 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).



Fire has gone out continued.

The combustion blower is not turning fast enough to generate the proper vacuum in the exhaust channel.

Visual check – is the blower motor turning?

Check the exhaust blower voltage across the blower wires (≥114V on #5 setting and ≥82V on #1 setting).

Replace the circuit board if the voltage reading is less than 82V with a line voltage

>115vac.

Check vacuum levels in the exhaust channel by bypassing the vacuum switch, and then remove the vacuum hose from vacuum switch. Check exhaust vacuum readings by placing the open end of the Vacuum

Hose on a 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).

Poor quality fuel. Insufficient energy in the fuel to produce enough heat to keep the stove burning or operational.




Exhaust temperature sensor failure.

Use a paper clip to clean out hose barb or remove the vacuum hose from the vacuum switch and blow into the hose to remove blockage.

To prevent further build up install, the Windsor Hose

Barb Shield (part# 50-472).

To reset the circuit board after a trouble code – push the ON/Off button.

3) AUGER LIGHT FLASHES

BUT AUGER MOTOR DOES

NOT TURN AT ALL


The 200°F (93°C) high limit temperature sensor has tripped.

Reset sensor and determine cause – was it Convection

Blower failure or 160°F

(71°C) temperature sensor failure if unit is equipped.

If the auger gearbox does not turn but the motors armature does try to spin then the auger is jammed.

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**


GENERAL

1) THE IGNITOR DOES

NOT WORK

Make sure the burn pot liner is pushed tight against the ignitor tube.

EF-2, 3, 4, 5

Place a jumper wire across the two leads at the 120 ° F (49°C) ignitor sensor.

THE UNIT WILL NOT LIGHT


If the ignitor works replace the sensor.

If the ignitor does not work, replace the ignitor.

CHECK THE COLOR OF THE IGNITOR

CHECK THE FUSES ON THE CIRCUIT

Remove the burn pot and the burn pot liner and look into the ignitor tube.

If it does not come to the right color, replace the ignitor.

THE COLOR OF THE IGNITOR

SHOULD BE BRIGHT ORANGE.


2) THE STOVE KEEPS

GOING OUT

If the stove goes out and leaves fresh unburned pellets or cigarette like ashes, the fire has gone out before the 140

(60 off.

° F

°C) temperature sensor shuts the stove

Check the position of the slider damper to make sure it is the correct position.

Turn the dial-a-fire up slightly (poor quality pellets).

If the stove goes out and there are partially unburned pellets left in the burn pot liner, and the unit shuts off due to the exhaust sensor opening before the fire went out. Too much/little air, power failure or poor quality fuel.

Adjust the air at the slider damper.

Check to see if the stove needs a more complete cleaning.

If the stove goes out and there are no pellets in the burn pot liner and the auger is stopping.

(REFER TO #3 and #5 in the dial-a-fire section of this manual).

If the auger is stopping

(refer sections #5 in the dial-a-fire section of this manual).


Turn the Dial A Fire up slightly (poor Quality pellets require a little higher setting).

Did the power go out?

PAGE. 23

COMPONENTS OF A

PELLET STOVE

AUGER AND AUGER MOTOR

This 1 RPM motor is responsible for turning the auger shaft, which in turn transports pellets to be dropped into the burn pot. The Timing Control Module and the Dial-A-Fire control the auger motor.

GREEN LIGHT

(EF 3, 4)This light will flash in conjunction with the pulses of the Auger.

(EF 2) Signals you to put the stove into the auto position

CONVECTION BLOWER

This blower mounted on the right hand side of the stove draws room air from the back of the stove and passes the air through the heat exchanger tubes and back into the room. The sealed system keeps the room air separate from the combustion air. The fan controller controls this fan.

CONVECTION FAN CONTROLLER

This controller is responsible for varying the speed of the convection blower. The stove does have a fan control override. Should the convection blower be set on low and the

Dial A Fire set on high, the convection blower will by-pass the fan controller and go to high speed. This will cool the stove until control is given back to the fan controller. To eliminate the possibility of the fan cycling the fan controller and the Dial A Fire should be set proportionately to one and other.

DIAL A FIRE (HEAT OUTPUT CONTROL)

This unit is responsible for controlling the timing of the auger motor. When turned clockwise it will cause the OFF time between auger pulses to shorten, resulting in more heat output and pellet consumption. Turn the counter clockwise and the reverse will happen. When it is turned fully counter clockwise until it clicks the auger will stop.

COMBUSTION/ EXHAUST BLOWER

This fan mounted on the left hand side of the stove is responsible for drawing outside fresh air into the combustion chamber for burning. The hot air then continues to be drawn over the heat exchanger tubes and then into the exhaust channel. It is then pushed out through the exhaust system.

START UP SWITCH (EF 3, 4)

When this switch is pressed it will initiate a start up timer including the igniter if installed in the unit.

AUTO/MANUAL SWITCH

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)


START UP TIMER(EF 3, 4)

This start up timer bypasses the exhaust temperature sensor allowing the stove to operate when the unit is cold. The timing cycle is initiated by pressing the start up switch. The start up timer is located right under the timing control module on the right

hand side rear pillar. This is also responsible for turning the igniter ON

TIMING CONTROL MODULE

The timing control module is mounted above the start up timer located on the right rear support pillar. This module controls the switching of power to the auger. The timing control modules switching duty is controlled by the Dial A Fire.

VACUUM SWITCH

This safety device (located on the left rear support pillar) detects vacuum in the exhaust system. If the blower fails or the vent pipe becomes plugged, this switch will sense that there is no air flow through the exhaust vent and will stop the auger from feeding pellets and then finally shutting the stove OFF.

CONTROL BOARD

This device controls the operation of the unit. This device has been designed to fully operate the unit; the control board can change the amount of fuel that delivered to the burn pot as well as room air blower (convection blower) functions. This device is also responsible for turning the unit ON and OFF. This control board can be operated manually or a wall thermostat can be installed on this unit as well

EXHAUST TEMPERATURE SENSOR

This sensor mounted on the exhaust blower housing has two functions:

- Should the fire go out, this sensor will shut the stove off when the exhaust temperature drops below its set point.

- When the auger is turned OFF via the Dial A Fire, the exhaust temperature will drop, when the exhaust temperature drops below set point the sensor will shut the stove OFF.

160 °F(71°C) CONVECTION FAN SENSOR

When this sensor mounted on the left side firewall reaches 160 °F(71°C) the convection blower will go to high cooling the unit before it overheats.

200 °F(93°C) MANUAL RESET HIGH LIMIT TEMPERATURE SENSOR

This sensor (located on the right hand side of the firewall) has a red push button in the center of the sensor. This is a safety device. In the event that the convection blower fails, this sensor will detect the stove might overheat and will shut the power OFF to the auger motor.

IGNITOR

A heating element used to ignite the pelletized fuel when the start up switch is activated; the ignitor is activated by the start up timer. Air passes through the igniter tube, which the air becomes super heated drying the fuel and then igniting the fuel through convection

PHASE CONTROLLER (EF-4)

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.


FLAME CHARACTERISTICS


EF 2 WIRING DIAGRAM


EF 3 Bay i WIRING DIAGRAM


EF 2-3 WIRING DIAGRAM (THERMOSTAT INTERFACE)


EF 4 WIRING DIAGRAM (THERMOSTAT INTERFACE)


EF 4 WIRING DIAGRAM


EF 5 WIRING DIAGRAM – Dial-a-Fire


COMBUSTION

BLOWER

EF 5 WIRING DIAGRAM – Circuit Board

WHITE

BLACK

VACUUM

SWITCH

BLUE

WHITE

GREY

GREY

ARMOR CABLE SUPPLIED

BLACK WHITE

OPTIONAL EXTERIOR

EXHAUST BLOWER

BROWN

120 DEG F 49 DEG C

EXHAUST

TEMPERATURE

SENSOR

BLACK

BLACK

BROWN

RED

WHITE

POWER

CORD

GROUND

J2

WHITE BLACK

COMMON HOT

5 A FUSES

THERMOSTAT

5 VDC

IGNITER

RED

160 DEG F 71 DEG C

CONVECTION

BLOWER

SENSOR

CONVECTION

BLOWER

PURPLE

WHITE

AUGER

MOTOR

200 DEG F 93 DEG C

HIGH LIMIT

TEMPERATURE

SENSOR

YELLOW

WHITE

ORANGE

ORANGE

WHITE

BLACK

WHITE

ORANGE

ORANGE

PURPLE

BLUE

YELLOW

RED

GREY

GREY

BROWN

BROWN

CONNECT

THERMOSTAT

HERE

RED

RED


COMBUSTION

BLOWER

WHITE

BLACK

VACUUM

SWITCH

BLUE

WHITE

WINDSOR WIRING DIAGRAM

GREY

GREY

ARMOR CABLE SUPPLIED

BLACK WHITE

OPTIONAL EXTERIOR

EXHAUST BLOWER

BROWN

120 DEG F 49 DEG C

EXHAUST

TEMPERATURE

SENSOR

BLACK

BLACK

BROWN

RED

WHITE

POWER

CORD

IGNITER

BLACK

160 DEG F 71 DEG C

CONVECTION

BLOWER

SENSOR

CONVECTION

BLOWER

PURPLE

WHITE

AUGER

MOTOR

200 DEG F 93 DEG C

HIGH LIMIT

TEMPERATURE

SENSOR

YELLOW

WHITE

ORANGE

ORANGE

GROUND

J2

WHITE BLACK

COMMON HOT

BLACK

5 A FUSES

THERMOSTAT

5 VDC

RED

WHITE

BLACK

WHITE

ORANGE

ORANGE

PURPLE

BLUE

YELLOW

RED

GREY

GREY

BROWN

BROWN

CONNECT

THERMOSTAT

HERE

RED

RED


MERIDIAN WIRING DIAGRAM


11) GLOSSARY

Device used either to remove exhaust gases from the stove or move air over the heat exchanger and into the room

BURN POT AND BURN POT LINER

This is were the pellets are dropped from the hopper and then burned.

BLOWER MECHANISM

CLEARANCE TO COMBUSTIBLES

The distance required to maintain a safe operating distance to a combustible material.

CLINKERS

Creosote builds up from a higher water content pellet or insufficient fresh air supply.

COMBUSTION CHAMBER

An area in the stove where the fire is or where combustion of the fuel takes place.

CONTINUITY TEST

By using a multimeter set the instrument on OHMS, this is determine if the circuit is complete, or continuos.

CREOSOTE

Black tar like build up produced by high water content pellets or incomplete combustion.

EFFICIENT FLAME

Is it a short or brisk forced flame with no black tips or lazy appearance.

EXHAUST SYSTEM

Designed to remove products of combustion from the house in a safe and proper fashion.

FRESH AIR INTAKE

This is a supply of fresh air pulled into the appliance to help combustion of the fire.

(Fresh air can also be pulled in from a vented crawl space)

MAGNEHELIC PRESSURE GAUGE

This is an extremely sensitive measuring device that measures vacuum in the stove.

(this measurement is in inches of water column. (Example: .01”wc)

MULTIMETER

An instrument used to measure Voltage (VAC VDC), Resistance (OHMS)

PELLET VENT

Is a listed component vent made of stainless steel inside and either a stainless steel or galvanized outer pipe. Can also be a stainless flexible vent for fireplace insert applications.

PELLETIZED WOOD FUEL

Recycled sawdust from sawmills or furniture manufactures. The fuel is compressed and squeezed through an extrusion, all aspects of the fuel are considered.

(Example ash content, water content, fines etc.)

PYROCERAMIC

Is a type of glass used on the stove, this glass is rated for a very high temperature.

Temperature rating on this glass is 1400 °F.

RATING PLATE

A plate in or on the appliance, which shows all certifications as well as the Serial number and

Model number of the stove.

RICH BURN

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 Enviro Service manual

FOR INSTALLERS AND SERVICE TECHNICIANS ONLY

PELLET

STOVE

SERVICE

MANUAL

TABLE OF CONTENTS PAGE

SUGGESTED TOOLS LIST

DIAL-A-FIRE

1) STOVE WILL NOT START

2) STOVE WILL NOT

OPERATE WHEN HOT

3) THE COMBUSTION

(EXHAUST) BLOWER

WILL NOT FUNCTION

4) THE CONVECTION

BLOWER WILL NOT

FUNCTION PROPERLY

5) THE AUGER MOTOR

DOES NOT FUNCTION

PROPERLY

AUGER MOTOR DOES NOT FUNCTION PROPERLY

CONTINUED

6) DIAL-A- FIRE HAS NO

EFFECT ON THE FIRE

7) THE STOVE WILL

NOT SHUT DOWN

CIRCUIT BOARD

OPERATION

1) Manual Mode, Factory Settings, No

Thermostat or Wall Switch

START-UP SEQUENCE

(15 minutes)

Normal Operation

Shut Down

2) HI/LOW Mode, With Thermostat or

Wall Switch

START-UP SEQUENCE

(15 minutes)

Thermostat contacts closed at time of start-up.

START-UP SEQUENCE

(15 minutes)

Thermostat contacts open at time of start-up.

NORMAL OPERATION

Thermostat contacts are closed.

NORMAL OPERATION

Thermostat contacts are open.

SHUT DOWN

Thermostat contacts are closed.

SHUT DOWN

Thermostat contacts are open.

3) ON/OFF Mode, With Thermostat or

Wall Switch

START-UP SEQUENCE

(15 minutes)

Thermostat contacts closed at time of start-up.

START-UP SEQUENCE

(15 minutes)

Thermostat contacts open when the ON/OFF button is pushed.

NORMAL OPERATION

Thermostat contacts are closed.

NORMAL OPERATION

Thermostat contacts are open.

SHUT DOWN

Thermostat contacts are closed.

SHUT DOWN

Thermostat contacts are open.

CIRCUIT BOARD CONTROLS

THERMOSTAT PIN SET-UP

Jumper pins J9 ithe HI / LOW mode

Jumper pins

9

OFF mode

CIRCUIT BOARD

1) LIGHT #2 ON HEAT

OUTPUT BAR FLASHING

LIGHT #2 ON HEAT OUTPUT BAR FLASHING CONTINUED

2) LIGHT #3 ON HEAT

OUTPUT BAR FLASHING

LIGHT #3 ON HEAT OUTPUT BAR FLASHING CONTINUED