Furnace Installation and Owners Manual
20
LDJ620_E01_R03_2006.03
Models LDJ620-9 and LDJ620-10
T
R O U B L E S H O O T I N G
Tips for Good Combustion
Trouble-free operation of the furnace requires
clean and dry corn, correct draft, and sufficient
combustion air.
Most burn problems in the furnaces and boilers
are because of a few common problems. Before
making any repairs, replacing components, etc.
check for these common problems:
•
wet corn (best moisture is 12-14%)
•
dirty corn (lots of ground up corn and fines)
•
wrong variety or type of corn, such as high-
oil, waxy, or treated (seed corn)
•
improper draft (too little or too much)
•
insufficient combustion air (not enough fresh
air supply, or combustion blower not open far
enough).
Take the following steps to ensure best results:
•
use 12-14% moisture, standard variety, clean
corn from a local farmer
•
make sure draft is set correctly
•
make sure sufficient combustion air is
supplied.
Refer to the tables below for detailed troubleshooting:
Initial Setup Quick Check
Operation Quick Check
Problem
Possible Causes
Fire won’t start
Initial startup may require use of kindling wood two or three times
before the corn begins to burn completely.
Chimney draft too high
On tall or large chimneys, a second barometric regulator may be
required, or it may be necessary to reduce the outlet opening to
approximately 28 square inches.
Furnace inefficiency
Incorrect timing during low fire operation. After 24 hours of initial
operation, OFF time may be adjusted. Refer to “Operation” on
page 13 for timing adjustment information.
Furnace overheating
Furnace installed incorrectly. If furnace is used for add-on service,
air backfeeding from the other furnace can cause overheating.
The hot air output, or the cold air return connections have been
reduced to less than 196 square inches.
Problem
Possible Causes
Fire won’t start
Leftover ash and clinker buildup from previous use.
Fire goes out
Chimney draft too high; clinkers are building up.
Furnace inefficient and has too much
ash
Wet or dirty corn; not enough combustion air; not enough draft; not
enough OFF time during low fire operation.
