A-Maize-Ing Heat NRP620-9, Installation Manual

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NRPIM620-9-20131212 Rev 1 Page 19 of 24
OPERATION
After the fire has been established in the burner pot and operating temperature has been reached
(See burner lighting pg. 18) 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.
A typical furnace cycle would be:
1. Thermostat activate 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
blower.*
3. When the thermostat setting is satisfied, the thermostat will shut off the fuel feed
system.
4. The furnace timer will activate, augering a specified amount of fuel to sustain burner
fire. (LOW FIRE) Timer is factory set at two (2) minutes “ON” and six (6) minutes
“OFF”. (This is a suggested setting - actual setting can be varied with user experience
and fuel used.)
5. Furnace 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) &
High (black wire-#1). All units are shipped from the factory on the Medium speed. Blower
speed may be changed by accessing the 4 in. x 4 in. electrical junction box on the side of the
furnace. Change blower speeds by disconnecting the yellow furnace wire from the current
speed wire and reconnecting it to the desired speed wire. Disconnected lead must be insulated
using the wire nut removed from desired speed wire.