USF Motors and Controls8
Control Box (Vari-Green: SynRM, Induction with VFD)
For motor technologies Vari-Green SynRM, and Induction with VFD,
a control box would be provided.
This control box can be mounted and wired (arrangement 4 only) or
shipped loose (all arrangements, induction only).
The control box features a NEMA-3R disconnect and Vari-Green
Hand/Off/Auto (HOA) controller.
Incoming power should be wired through the side of the control box
and terminated at the provided terminal blocks. See wiring diagram
included in fan submittal.
For ship loose control boxes, motor wiring shall be provided by
others.
The Induction motor control box configuration has multiple control options:
NOTE
XHHW motor wire is recommended when VFD installed in distances greater than 25 feet from motor.
1. Hand/Off/Auto
2. Remote Dial
3. Touch Remote
4. Constant Pressure
5. Constant Airflow
6. IAQ – Temp / Humidity
7. IAQ – VOC
VG - HOA
NEMA-3R
Disconnect
Incoming
Power
CONTROL BOX
VFD
HOA
L1
L2
L3
Field installed wires
supplied by others
See HOA IOM for
connection details
Ship loose control box
Motor wires supplied by others
Incoming Power
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