Hired-Hand ICS-500 Environmental Controller User Manual
Page 11
Integrated Control System 500 9
6.1.2.2.7.Variable Speed Fan (Enhanced Version Only)
6.1.2.2.7.1.Variable Minimum Adjust
If you have the enhanced version of this controller, this
potentiometer controls the minimum speed of the variable
speed fan. For example, if the variable minimum is set at
50%, the fan will never run below half speed.
If you have the basic version of the controller, these switches
are not installed.
6.1.2.2.7.2.Variable Span Adjust
This setting controls the temperature difference between the
minimum speed temperature setpoint and the maximum
speed setpoint. In other words, this value represents the range
of the variable speed fan.
6.1.2.2.7.3.Variable Offset Adjust
The variable offset is the number of degrees from target
temperature at which the variable speed fan will be at
minimum speed. For example, if target temperature is 75
degrees, and the variable offset is set at minus 5 degrees, then
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