Section 408.17715. Continuous-flow bulk raw grain dryers.

(1) All direct-heat grain dryers shall be equipped with automatic controls that do both of the following:

(a)   Shut off the fuel supply in case of power or flame failure or interruption of air movement through the exhaust fan.

(b)   Stop the grain from being fed into the dryer if excessive temperature occurs in the exhaust of the drying section.

(2)   Direct-heat grain dryers installed after June 8, 1988 shall be located in any of the following areas:

(a)   Outside the grain elevators.

(b)    In an area inside the grain elevator which is protected by a fire or explosion suppression system.

(c)   In an area inside the grain elevator which is separated from other areas of the facility by construction having at least a 1-hour-fire-resistance rating.

History: 1988 AACS; 2014 AACS.