Rockwell Automation FANM FanMaster Energy Saving Package - Manual (Page 57)

FanMaster Configuration and Start Up 3-21
Allen-Bradley® FanMaster™ Energy Saving Package Installation Manual - Publication FANM-IN001B-EN-P – December, 2009 PN-65329
Note: When in heating mode, the supply fan speed will typically be set
based on the difference in temperature (Delta-T) between the mixed air and
supply air (as illustrated, using default values, in
Figure 3.3 and Figure 3.4
below) unless the supply air temperature exceeds the high limit override (is
greater than the default value of 155° F). If the supply air temperature
exceeds the high limit override value, the fan speed will increase to the VFD
output maximum value (for heating setup).
Figure 3.3 Example Two-State Heating Setup
Figure 3.4 Example Proportional Heating Setup
Delta-T
F
an Speed (%)
Two-State Heating Setup
Delta-T
Min
Delta-T
Max
VFD
Output
Min
VFD
Output
Max
(Supply Air - Mixed Air Temp.)
10 20 30 40 50
100
75
50
25
0
Proportional Heating
Delta-T
Min
Delta-T
Max
VFD
Output
Min
VFD
Output
Max
F
a
n Speed (%)
Delta-T
(Supply Air - Mixed Air Temp.)
10 20 30 40 50
100
75
50
25
0