(a) Dryer heating units shall be operated to provide reasonably
complete combustion before heated gases are allowed to enter hot gas
inlets.
(b) Dryer heating units which are fired by pulverized coal, shall be
operated and maintained in accordance with the recommended standards set
forth in the National Fire Protection Association Handbook, 12th Edition,
Section 9, "Installation of Pulverized Fuel Systems," 1962.
