ENVIRO-TEC
20
HP Fan Calibration with ECM Variable Speed Motor
FIG. 2 - FAN CALIBRATION CURVES
NOTES:
1. MANUAL BALANCING: Do not set the manual CFM adjustment voltage lower than 5.0 VDC or higher
than 10.0 VDC. (For units shipped prior to April 2011, do not set voltage lower than 5.1 VDC or higher
than 9.9 VDC).
2. REMOTE BALANCING: Do not set the remote CFM adjustment voltage lower than 2.1 VDC or higher
than 10.0 VDC. (For units shipped prior to April 2011, do not set voltage lower than 2.1 VDC or higher
than 9.9 VDC).
3. WARNING: Input voltages which are less than or greater than the limits defined above may cause
erratic motor operation and eventual failure.