Variable Frequency Drive Operation - Greenheck 100 Series Installation, Operation And Maintenance Manual

Variable Frequency Drive Operation

For operation with a variable frequency drive (VFD) always check motor amps when adjusting the operating
frequency. Motor may be sized for the original selected operating speed under 60 Hz. Bypassing the VFD or
increasing the speed from this original selection, even if less than 60 Hz, may cause motor to overload or fail.
Consult factory with fan serial number before increasing the upper limiting frequency.
Always check the fan RPM when adjusting the operating frequency. Do not exceed maximum class fan RPM of
the wheel.
It is the responsibility of the installing body to perform coast-down tests and identify any resonant frequencies
after the equipment is fully installed. These resonant frequencies are to be removed from the operating
range of the fan by using the "skip frequency" function in the VFD programming. Failure to remove resonant
frequencies from the operating range will decrease the operating life of the fan and void the warranty.
Model USF Series 100, Direct Drive, Backward-Inclined – VFD Speed Change
This unit ships with the variable frequency drive (VFD) preprogrammed based on selected performance.
No additional programming is required.
1. To operate, turn disconnect on and allow VFD to power up.
2. Once VFD display is shown, press LO/RE button, which will switch control
from remote to local.
3. If necessary, use vertical arrows to scroll through display screens to find
frequency reference F.
4. Frequency should be programmed from factory. To balance system (by
adjusting frequency), press Enter and use vertical arrows and Reset / >
button until desired frequency is achieved. Press Enter to set frequency.
5. Press Run to start fan.
6. If additional adjustment is required, press Stop and repeat steps 3-4.
Troubleshooting USF Series 100, Direct Drive, Backward-Inclined – Variable Speed
Vari-Green Controls
- see www.greenheck.com/vari-green for more details. To start, reference IOM# 473681.
VFD
- download the Yaskawa Manual for AC Drive - J1000 at www.yaskawa.com OR call 1-847-887-7457,
prompt 2 (7:00 am to 5:30 pm - central standard time (CST) - Monday thru Friday).
®
Vari-Green Motor and Controls (#473681 IOM)
www.greenheck.com/resources/library/literature
Yaskawa support website
www.yaskawa.com/products/drives/industrial-ac-drives/microdrives/j1000-drive
NOTE
Universal Single Width Fans 15