Rockwell Automation FANM FanMaster Energy Saving Package - Manual (Page 56)

3-20 FanMaster Configuration and Start Up
Allen-Bradley® FanMaster™ Energy Saving Package Installation Manual - Publication FANM-IN001B-EN-P – December, 2009 PN-65329
49. Below “Cooling Setup”, enter the following values:
a. Press the value next to “Delta-T Min” and enter the difference in
temperature between the mixed air and supply air at or below which
the drive will run the supply fan at the minimum speed (set in the
corresponding “VFD Output Min” field) when cooling the
conditioned space.
– For two-state cooling: When the difference in temperature rises
above the value set in this field, the supply fan will be
commanded to full speed (100% on).
– For proportional cooling: When the difference in temperature
rises above the value set in this field, the supply fan will ramp up
to a speed proportionate to the temperature difference.
b. Press the value next to “Delta-T Max” and enter the difference in
temperature between the mixed air and supply air at or above which
the drive will run the supply fan at the maximum speed (set in the
corresponding “VFD Output Max” field) when cooling the
conditioned space.
– For two-state cooling: The value set in this field has no affect on
the fan motor speed and can be left set to the default value.
– For proportional cooling: When the difference in temperature is
below the value in this field, the supply fan will ramp up to a
speed proportionate to the temperature difference until the value
in this field is reached. Once the temperature difference in this
field is reached the fan speed will not exceed the value set in the
corresponding “VFD Output Max” field (typically 100%).
c. Press the value next to “VFD Output Min” and enter the percentage
of full speed that the drive will run the supply fan when the
temperature difference is at or below the minimum value (set in the
corresponding “Delta-T Min” field) when cooling the conditioned
space.
d. Press the value next to “VFD Output Max” and enter the percentage
of full speed that the drive will run the supply fan when the
temperature difference is at or above the maximum value (set in the
corresponding “Delta-T Max” field) when cooling the conditioned
space.