25
6.
Set humidistat knob for relative humidity, above which you wish to add supplemental heat to the
drying air. The thermostat setting overrides the humidistat setting in the event the bin temperature
exceeds the thermostat setting, thus acting as a high limit.
7.
Whenever shutting down your fan & heater system, always close the fuel source at the tank,
draining the lines, allow the heaters safety system to detect no flame and lock itself out.
8.
AFTER STEP 7 HAS BEEN COMPLETED- turn the heater panel power switch to the off
position. Then shut down the fan
TROUBLE SHOOTING GUIDE
Heater Will Not Fire:
Be sure thermostat has a set point higher than the ambient temperature; otherwise heater is in standby
mode.
Check heater regulator to determine a gas flow is available and the fuel source valves are open. On LP
units- check valve on lower manifold to be sure it’s in the open position.
Check all high limit switches (see Fig.2, page 37) to be sure they are closed. Press the red button located
on each high limit to insure they are engaged. There are three high limit switches located on all LP liquid
heaters and two on all vapor and super-low units.
Following the TC-100 power cord back to the heater and into the control box; check ground wire (green)
is connected to ground lug on bottom of control box. Check the power wire (in this case- white) is
connected to #7 on the terminal block. Check that the return power wire (black) is connected to terminal
#8 directly on control board. Use a voltage meter, set on continuity, to be sure the thermostat is operating
properly.
If the heater still will not fire, the problem may not be related to the thermostat control. Review the
trouble shooting guide on pages 33-35.
Heater Fires But Does Not Cycle Off or Has A Long Cycle:
Check to see if the control boxes bottom is free of any debris; this must be open and not sealed, to allow
air to exit; otherwise a dead space has been created and the thermostat cannot properly sense the bin
temperature.
Adjust the gas regulator to satisfy the thermostat. Too low of gas flow will cause the heater to burn
longer. But keep in mind; higher than necessary gas pressure setting will only result in shorter “on”
cycles and will not dry your grain any faster.