Greenheck USF User Manual

®
USF Motors and Controls 1
®
Document 1037587
Model USF
Motors and Controls
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
DANGER
Always disconnect, lock and tag power source before
installing or servicing. Failure to disconnect power
source can result in fire, shock, serious injury or death.
CAUTION
When servicing the fan, motor may be hot enough
to cause pain or injury. Allow motor to cool before
servicing.
CAUTION
Precaution should be taken in explosive atmospheres.
DANGER
Pour écarter les risques d’incendie, de choc électrique
ou de blessure grave, veiller à toujours débrancher,
verrouiller et étiqueter la source de courant avant
l’installation ou l’entretien.
ATTENTION
Lors de toute intervention sur la soufflante, le moteur
peut être suffisamment chaud pour provoquer une
douleur voire une blessure. Laisser le moteur refroidir
avant toute maintenance.
ATTENTION
Faire preuve de précaution dans les atmosphères
explosives.
Table of Contents
General Safety Information . . . . . . . . . . . . . . 2
USF Controls Overview . . . . . . . . . . . . . . . 3-4
Vari-Green
®
Brushless Direct Current Motor (BLDC) 4-5
Vari-Green
®
Synchronous Reluctance Motor (SynRM) 6
Induction Motors with VFD . . . . . . . . . . . . . . 7
Control Box (Vari-Green
®
: SynRM, Induction with VFD)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Vari-Green
®
Controls. . . . . . . . . . . . . . . . 9-10
Hand/Off/Auto Controller
Remote Dial
Touch Remote
Constant Pressure
Constant Airflow
IAQ - Temp/Humidity
IAQ - VOC
Electrical Installation Guidelines . . . . . . . . . . . .11
Additional Operating Information . . . . . . Backcover
Our Committment . . . . . . . . . . . . . . Backcover
Ship Loose VFD
Control Package
VG-BLDC
VG-SynRM or
Induction Motor with
Mounted and Wired VFD

Greenheck USF Specifications

General

Brand	Greenheck
Model	USF
Category	Fan
Language	English

Summary

General Safety Information

Receiving and Inspection

Check items for completeness and shipping damage upon arrival. Report any detected damage.

Unpacking and Verification

Verify all required parts and correct quantities are received. Report any missing items.

Handling Precautions

Handle to prevent scratching or chipping the coating, which affects corrosion resistance.

Storage Guidelines

Store units indoors in a low humidity atmosphere between 30-110°F to prevent deterioration.

Storage Inspection and Maintenance

Inspect equipment monthly during storage, cleaning if moisture or dirt accumulations are found.

Removing Units from Storage

Protect and maintain units similarly until operation. Check assembly for working order before installation.

USF Controls Overview

AC Induction Motor Configuration

Describes the basic AC induction motor configuration available for the USF fan.

Vari-Green BLDC Motor with Potentiometer

Details the Brushless Direct Current motor paired with a speed-adjusting potentiometer.

Vari-Green BLDC Motor with HOA Controller

Explains the BLDC motor integrated with a Hand/Off/Auto controller option.

Vari-Green SynRM Motor with HOA Controller

Covers the Synchronous Reluctance Motor with its Hand/Off/Auto controller.

Induction Motor with VFD and HOA Controller

Describes the induction motor paired with a Variable Frequency Drive and HOA.

Vari-Green Brushless Direct Current Motor (BLDC)

VG-BLDC Basic Assembly

Details the basic BLDC motor assembly with disconnect, enclosure, and potentiometer.

VG-BLDC Advanced Assembly

Describes the advanced BLDC assembly including HOA controller and transformer.

Vari-Green Synchronous Reluctance Motor (SynRM)

3-phase VG (EC Titanium) Configuration

Details the 3-phase SynRM motor requirements, features, and control options.

Induction Motors with VFD

VFD Options and Models

Explains the VFD models (ACS-255, ACS-320) used and their applications by voltage/phase.

Control Box (Vari-Green: SynRM, Induction with VFD)

Control Box Features and Mounting

Describes the control box, its NEMA-3R disconnect, HOA controller, and mounting options.

Vari-Green Controls

Hand/Off/Auto (HOA) Control

Explains the HOA controller's operation, including local and remote signal inputs.

Remote Dial Speed Control

Details the optional ship loose dial for remote speed adjustment.

Touch Remote Control

Describes the optional ship loose push button control for remote installation.

Constant Pressure Control

Adjusts fan speed to maintain a static pressure set point.

Constant Airflow Control

Adjusts fan speed to maintain a constant airflow level.

IAQ Temp/Humidity Control

Senses and adjusts fan speed based on temperature and humidity.

IAQ VOC Control

Senses volatile organic compounds (VOCs) and adjusts fan speed.

Electrical Installation Guidelines

Electrical Safety and Wiring Practices

Covers hazardous voltage, wiring precautions, grounding, conduit requirements, and protection.

Additional Operating Information

Operating Parameters and Control Interaction

Details operating conditions, HOA/VFD interaction, and fan speed calculation.