Conair HTC 120, User Manual

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4-66 l O p e r a t i o n
Adjusting the Energ ySmart Dr yer
System
(continued)
Without OptiMizer
TM
Mode
Increasing hopper outlet temperatures or increasing air flow will increase the
pressure drop in the filters due to the velocity of the air increasing. Increasing
air temperature decreases its density (air expands as it is heated). This decrease
in density causes an increase in the velocity of the air. Increased velocity
increases the pressure drop.
Temperature - Gas (GasTrac)
In addition to what is described in the "Temperature - Electric (Hopper
Temperature Controllers [HTCs])" section, the GasTrac heater will have limited
turndown capability. The operating range is affected by how low the flame can
turned down. For example, as the air flow setpoint is lowered, the GasTrac will
automatically adjust (turn down) the flame to maintain the same setpoint tem-
perature. Eventually, the GasTrac will reach the minimum limit of its range of
turndown capability and any further decrease in air flow will start to increase
the temperature above the setpoint due to increased residency time. This condi-
tion will activate a deviation alarm and shut down the GasTrac.