NRP620-9 OMEPAPV20161017 (ENGLISH) REV 1
Page 28 of 42
OPERATION
After the fire has been established in the burner pot and operating temperature has been reached (See
burner lighting pg. 26) you need only to set the thermostat to the desired temperature. The
thermostat will turn the furnace bin auger motors and combustion blower, on and off, to sustain the
desired temperature.
CAUTION
Never add fuel to the burn pot directly while a fire is established. This can cause the
generation of excessive smoke and a potentially hazardous condition.
A typical furnace cycle would be:
1.
Thermostat activates fuel feed system, feeding the burner pot with fuel. (HIGH FIRE)
2.
Heat builds up in the furnace activating the fan switch, which in turn starts the furnace
convection blower.*
3.
When the thermostat setting is satisfied, the thermostat will shut off the fuel feed system.
4.
The furnace timer will activate, auguring a specified amount of fuel to sustain burner fire. (LOW
FIRE) Timer is factory set at two (2) minutes “ON” and twelve (12) minutes “OFF”. (This is a
suggested setting - actual setting can be varied with user experience and fuel used.)
5.
Furnace convection blower will continue to run until heat is removed from furnace.
*NOTE: The furnace blower has three (3) speeds. Low (red wire-#3), Medium (blue wire-#2), and
High (black wire-#1). All units are shipped from the factory on the High speed. Blower speed
may be changed by accessing the 4 in. x 4 in. electrical junction box on the side of the furnace.
Disconnect power before changing any electrical connections. Change blower speeds by
disconnecting the yellow wire from the current speed wire and reconnecting it to the desired
speed wire. Disconnected leads must be insulated to prevent contact with other components.
Clinker Buildup
CAUTION
If the furnace is installed in an unsuitable application, causing the furnace to run on high fire for
extended periods of time, or if certain varieties of fuel are burned, clinkers can form resulting in
furnace inefficiency and possible fire outage.
The A-Maize-Ing Heat® furnace feeds fuel into the bottom of the burner, therefore creating the most
efficient fuel consumption. The residual ash and clinkers are then spilled over the top of the burner
ring, falling into the ash pan below. This process essentially cleans the burner chamber.
The clinkers that stick to the side of the firepot must be loosened with a furnace poker (provided) and
removed manually with furnace tongs or the clinkers could render the furnace inoperative.
If the formation of clinkers is the result of a fuel high in starch or oil (corn or soybeans for example),
blending the fuel with another fuel low in moisture, starch, and oil (wood pellets for example) may
provide better results.
