Vari-Green ® Brushless Direct Current Motor (Bldc) - Greenheck USF Installation, Operation And Maintenance Manual

USF Motor Technology Configuration
Not all motor technologies are available at every motor size and phase. Below is a general overview of motor
technology via phase and horsepower.
USF Motor Technology Configuration
Vari-Green - EC Motor
HP Single Phase
0.25 BLDC
0.33 N/A
0.5 BLDC
0.75 BLDC
1 BLDC
1.5 N/A
2 N/A
3 N/A
5 N/A
7.5 N/A
10 N/A
15 N/A
20 N/A
25 N/A
30 N/A
VG-BLDC
Vari-Green (VG) Brushless Direct Current Motor (BLDC)
The USF utility blower offers BLDC motors as part of its available
configurations. These motors are available in horsepowers from 0.25 to 1, in
single phase voltages from 115 to 277, and provide up to 80% energy savings
over traditional 1-phase induction motors. Their built-in electronics also provide
the ability to adjust motor speed locally, as well as remotely with the purchase
of additional accessories.
The USF uses two different BLDC motor type assemblies: a basic configuration
and an advanced assembly.
VG-BLDC motors are only available on USF-B7 selections.
VG-BLDC Basic Assembly
The basic assembly includes the BLDC motor, shaft-mounted cooling fan, toggle-style disconnect, and NEMA-3R
enclosure to protect the motor from weather. A potentiometer dial connected to the motor allows the motor rpm to
be adjusted.
Basic Assembly
• Motor
• Brackets
• Cooling fan
• Potentiometer
• Disconnect
• Enclosure
The power supply to the fan should be wired into the disconnect junction box. See wiring diagram included in fan
submittal.
The basic VG-BLDC assembly has two control options:
1. Dial on motor
2. 0-10 VDC
4 USF Motors and Controls
Induction with VFD
Three Phase Single Phase
N/A N/A
N/A N/A
N/A Ind. with VFD
N/A Ind. with VFD
SynRM Ind. with VFD
N/A Ind. with VFD
SynRM Ind. with VFD
SynRM Ind. with VFD
SynRM N/A
SynRM N/A
SynRM N/A
N/A N/A
N/A N/A
N/A N/A
N/A N/A
VG-SynRM
1ph3ph VFD
NOTE
Three Phase
N/A
N/A
Ind. with VFD
Ind. with VFD
Ind. with VFD
Ind. with VFD
Ind. with VFD
Ind. with VFD
Ind. with VFD
Ind. with VFD
Ind. with VFD
Ind. with VFD
Ind. with VFD
Ind. with VFD
Ind. with VFD
3ph VFD
®