36
7036-187M
August
13,
2018
MT. VERNON AE INSERT
Input Line Voltage
AC out to Control
Board
15V DC out to
Control Board
Fuse
15A 250V
Power Supply shown with cover removed
Input Line
Voltage
Heat sinks are taped to cover for shipping. Slowly lift cover
and cut the tape holding them in place and then you can
remove the cover.
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
n/
a
Fuse 15A 230V,
under the cover
Fuse 15A 230V,
under the cover
Figure 36.2 - Control Board
Figure 36.1 - Power Supply
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 appliance down, however the wall control will still
display messages. This sensor must be manually re-
set. Disconnect power before resetting.
19. Thermocouple - Fire pot
This thermocouple is located on top of the fire pot
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 fire pot.
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 Thermostat
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 appliance located in the component
pack.
23. Wiring Schematic for Power Supply
See
Figure 36.1
below.
24. Wiring Schematic for Control Board
See
Figure 36.2
below.
25. Wiring Schematic
See
Figure 37.1 on pages 37 and 38
.
B. Wiring Schematic for Power Supply
C. Wiring Schematic for Control Board
#
Description
#
Description
#
Description
1
Combustion Blower
7
Thermostat Wall Control
12 Igniter
2
Auto-Clean System
8
Combustion Blower (feedback)
13 AC Power In for Igniter
3
Feed / Auger Motors
9
Fire pot thermocouple
14
Convection Blower Power
4
Hopper / Door Switches
10
Drop Tube Thermocouple
15
Overheat Sensor (Snap Disc)
5
Auger / Auto-Clean / Vacuum
Switches
n/a Not Used
16 DC Power In form Power
Supply
6
Low Fuel
11
Convection Blower (feedback)
17
12 Volt Battery Back-up