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AUTOMATIC CONTROLS FOR USE WITH DRYING HEATERS
MODEL TC-100, TC-400, & HT-3000 THERMOSTAT CONTROL
WARNING! Although these controls are called “automatic”, they do not sample the grain for proper
moisture content! They are designed to cycle the heater on and off to the set of conditions that you select.
RESPONSIBILITY FOR THE GRAIN CONDITION IS YOURS!
SHIPPING, RECEIVING AND INSPECTION
All cardboard cartons are shipped attached to heater, with power cord installed. Inspect controls for
damage, noting any found on freight bill.
INSTALLATION
WARNING! Before installing the control, disconnect and lock out all power to heater!
Handle the control carefully. Take care not to kink or damage the capillary tube.
Note: Before choosing where to mount the control to the bin, be sure the electric cord of the control will
reach the heater control panel. The preinstalled cord is approximately 11’-6” in length.
Mount the control on the bin sidewall between the perforated floor and the concrete foundation, three feet
to the side of the transition. Tape the enclosed template (found in back of manual) to the bin wall so the
top two mounting holes locate on a corrugation ridge. Mark and drill the holes as shown. Location of the
½” hole is critical for proper alignment with the thermometer stem. Improper alignment will damage the
thermometer. The sensing element remains inside the control (outside the bin.)
Using the self-drilling screws provided, fasten the control to the bin wall, taking care not to damage or
bend the stem of the thermometer. Neoprene rubber or foam insulation (not included) should be used
around the top and sides of the control where it fastens to the bin wall. Do not seal bottom of control
enclosure, as this is where the air must exit.
FIG. BB
PLENUM THERMOSTAT
Thermometer stem
only thru bin wall.
thermostat capillary
stays inside enclosure
not inside bin.
Probe
Transition High Limit
Transition
When mounting enclosure
do not seal bottom with
rubber or foam. Leave open.
Air circulates threw enclosure.
Heater
