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September 1, 2008
7034-106E
Page 39
Mt. Vernon Pellet Stove (AE)
17. Power Supply
The power supply is located at the rear of the appliance. It
converts 120 volt AC current to 15 volt DC current to power
the appliance.
18.
Overheat Sensor (Snap Disc)
The overheat sensor is mounted on the back of the drop tube in
the center of the appliance and has a reset button. To access
it remove the right side panel. If the fire tries to burn back
into the feed system or push exhaust up the feed tube, this
sensor will shut the stove down, however the wall control will
still display messages. This sensor must be manually re-set.
Disconnect power before resetting.
19. Thermocouple - Firepot
This thermocouple is located on top of the firepot inside
the thermocouple cover (ceramic protection tube). The
thermocouple sends a millivolt signal to the control board
telling the control board there is a fire in the firepot.
20. Thermocouple - Drop Tube
This thermocouple is located on the bottom of the drop
tube on the right side and attached with a wing nut. It turns
the convection blower on and off, varies the speed of the
convection blower and will shut down appliance if internal
heat exceeds set temperature.
21. Vacuum Switch
The vacuum switch is located on the right side of the
appliance under the feed motor behind right side panel and
connects to the drop tube with a hose. This switch turns
the feed system on when vacuum is present in the firebox.
The vacuum switch is a safety device to shut off the feed
motor if the exhaust or the heat exchanger system is dirty,
plugged or if the firebox door is open.
22. Wall Control
The appliance is designed to run on a custom designed 3.3
volt DC thermostat wall control. It will not operate on any
other wall control. Refer to the instructions supplied with
the thermostat wall control.
23. Wiring Schematic for Control Board
See Figure 39.1 below.
24. Wiring Schematic for Power Supply
See Figure 39.2 below.
Figure 39.1
Figure 39.2
120V AC in
120V AC out to
Control Board
15V DC out to
Control Board
Fuse 15A 250V
(need to remove
cover)
# Description
1 Combustion Blower
2 Auto-Clean System
3 Feed/Auger Motors
4 Hopper/Door Switches
5 Auger/Auto-Clean/Vacuum
Switches
6 Low Fuel
# Description
7 Thermostat Wall Control
8 Combustion Blower (feedback)
9 Firepot Thermocouple
10 Drop Tube Thermocouple
n/a Not Used
11 Convection Blower (feedback)
# Description
12 Igniter
13 AC Power In for Igniter
14 Convection Blower Power
15 Overheat Sensor (Snap Disc)
16 DC Power In from Power Supply
17 12 Volt Battery Back-up
17
1
2
3
4
5
6
7
8
9
1011
1213
14
15 16
n/a
Fuse 15A 120V,
under the cover
Fuse 15A 120V,
under the cover