Installation, Drying, Warm-Up, Repairs

Warning When using burners for dryout or warm-up operations, do not skimp on adequate flame safety and programming just because you think this is a temporary operation. Too many new furnaces have never produced a nickel because of start-up explosions. The most dangerous times for furnaces are, as with airplanes, (pardon the expression) during takeoff and landing. 

Warm-up times can be considerably less than dryout times, if no moisture needs to be driven off. Some warm-up time is important even for previously dried-out furnaces to minimize refractory spalling because of too-rapid or uneven thermal expansion of the dry, solid refractory. 

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