USF Motors and Controls 5
Dial on Motor: features the motor assembly in its native form using the potentiometer to control the fan speed. The
potentiometer (part number 385806) comes plugged into the 9-pin connector of the motor. To increase speed, rotate
the dial clockwise. To decrease speed, rotate the dial counterclockwise.
0-10 VDC: uses the same native motor assembly. The dial is included for test and balance. From 0-1.9V, the motor
will be off, and will operate in the 2-19V range. A low voltage wiring harness is necessary to supply the 0-10V signal
to the motor. It is included when 0-10VDC is selected and shipped separately. The dial must be removed before the
pigtail can be connected.
The pigtail can be purchased independently, as well:
Replacement Basic VG-BLDC motor assemblies
The complete motor assembly can be purchased for easy servicing, should it be needed in the future. The assembly
includes the VG motor, shaft mounted cooling fan, disconnect switch, dial fan control, and NEMA-3R rated motor
enclosure.
VG-BLDC Advanced Assembly
The advanced assembly takes the basic version and adds a 24V transformer and Vari-Green Hand/Off/Auto (HOA)
controller for additional capability. The motor RPM is then controlled either locally via the HOA or via a 0-10V signal
sent to the unit via an external remote source.
Advanced Assembly
• Removes dial
• Adds HOA and transformer
• Larger enclosure
The power supply to the fan should be directed into the motor box and connected to the disconnect. See wiring
diagram included in fan submittal.
The advanced VG-BLDC assembly has multiple control options:
1. Hand/Off/Auto
2. Remote Dial
3. Touch Remote
4. Constant Pressure
5. Constant Airflow
6. IAQ – Temp/Humidity
7. IAQ – VOC
Replacement advanced VG-BLDC motor assemblies
The complete motor assembly can be purchased for easy servicing should it be needed in the future. The assembly
includes the VG motor, shaft mounted cooling fan, disconnect switch, transformer, VG-HOA controller, and NEMA-3R
rated motor enclosure.
To get additional information on the Vari-Green BLDC motors, see the Vari-Green Motors and Controls IOM;
Document 473681.
Low Voltage Harness Part numbers 0-10V Analog Input Connection
Type 24 in. part number 35 in. part number Red 0-10 VDC
9-pin 385821 385822 White Common
Replacement Basic VG-BLDC Motor Assemblies
Motor Assembly
Assembly Part
Number
Includes VG
Motor
HP Voltage Phase RPM Switch Control
Basic
919288 357159 0.25
115/208-
230/277
1 300 - 1750 NEMA-3R
Dial on motor
(Potentiometer)
919289 320588 0.50
919290 350589 0.75
919291 320590 1
Replacement Advanced VG-BLDC Motor Assemblies
Motor Assembly
Assembly Part
Number
Includes VG
Motor
HP Voltage Phase RPM Switch Control
Advanced
919292 357159 0.25
115/208-
230/277
1 300 - 1750 NEMA-3R Hand/Off/Auto
919293 320588 0.50
919294 350589 0.75
919295 320590 1
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