Greenheck CUE-180-VG Direct Drive Upblast Centrifugal Roof Exhaust Fan
Printed Date: 04/24/2025
Mark: CUE-180-VG
Specifications
Dimensional Data
| Quantity | 8 |
| Weight w/o Acc's (lb) | 89 |
| Weight w/ Acc's (lb) | 91 |
| Standard Curb Cap Size (in.) | 30 x 30 |
| Roof Opening (in.) | 26.5 x 26.5 |
The fan unit has an approximate diameter of 37.24 inches, a height of 37.05 inches, and a base dimension of 30.00 square inches. The overall height may be greater depending on the specific motor, adapter, or hinge base used.
Performance Data
| Requested Volume (CFM) | 2,600 |
| Actual Volume (CFM) | 2,600 |
| Total External SP (in. wg) | 0 |
| Fan RPM | 688 |
| Operating Power (hp) | 0.15 |
| Elevation (ft) | 5,138 |
| Airstream Temp. (F) | 70 |
| Air Density (lb/ft3) | 0.062 |
| Tip Speed (ft/min) | 3,333 |
| Static Eff. (%) | 0 |
The performance graph illustrates the fan's operating characteristics. It plots Static Pressure (in. wg) against Volume (CFM), with Brake Power (hp) shown on a secondary axis. The fan curve shows the fan's performance, the system curve represents ductwork resistance, and the brake horsepower curve indicates power consumption. The specified operating point is at 2,600 CFM with 0 in. wg static pressure, requiring approximately 0.15 hp. The fan curve peaks at around 0.4 in. wg static pressure at approximately 1,000 CFM.
Miscellaneous Fan Data
| Fan Energy Index (FEI) | - |
| Outlet Velocity (ft/min) | 890 |
Motor Details
| Motor Mounted | Yes |
| Size (hp) | 3/4 |
| Voltage/Cycle/Phase | 115/60/1 |
| Enclosure | ODP (Open Drip Proof) |
| Motor RPM | 875 |
| Efficiency Rating | High |
| Windings | 1 |
| FLA (Amps) | 8.8 |
| Min. Circuit Ampacity (MCA) | 11 |
| Max. Overcurrent Protection (MOP) | 20 |
| Short Circuit Current Rtg (SCCR) | 5 kA |
Sound Power by Octave Band
| Sound Data | 62.5 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 | LwA | dBA | Sones |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Inlet | 70 | 76 | 69 | 63 | 62 | 62 | 50 | 40 | 69 | 57 | 8.3 |
Sound data is provided for the inlet. LwA represents the A-weighted sound power level (ANSI S1.4), and dBA represents the A-weighted sound pressure level (based on 11.5 dB attenuation per octave band at 5 ft). Sones are calculated per ANSI/AMCA 301 at 5 ft.
Notes
- All dimensions are provided in inches.
- NEC FLA, MCA, and MOP values are for reference, based on National Electric Code 2020 tables 430.248 or 430.25. Actual motor FLA may differ; consult the factory for thermal overload sizing.
- MCA and MOP values listed cover only the motor, excluding accessories like damper actuators or field-supplied VFDs.
- The unit is certified by AMCA International for sound and air performance, indicated by the AMCA CERTIFIED RATINGS seal.
Construction and Options
Standard Construction Features
- Aluminum housing.
- Backward curved composite wheel (for sizes 60-95) or aluminum wheel (for sizes 99-300).
- Aluminum curb cap with prepunched mounting holes.
- Drain trough included.
- Features ball bearing motors for sizes 85-300 and all Vari Green models, and sleeve bearing motors for sizes 60-80.
- Motor is isolated on shock mounts to reduce vibration.
- Utilizes corrosion-resistant fasteners.
- Includes a removable power pack for easier maintenance.
- Offers tool-less hood entry for convenient access.
Selected Options & Accessories
- Motor Option: Vari-Green EC motor
- Control Option: Dial for balancing
- Standard Curb Cap Size: 30 Square
- Certifications: UL/cUL 705 Listed for "Power Ventilators"
- Switch Type: NEMA-1, Toggle
- Junction Box: Mounted and wired within a weather-protected motor compartment
- Wheel Material: Aluminum
- Conduit Chase: Quantity 1
- Unit Warranty: 1 Year (Standard)
Vari-Green Motor & Control Options
The Vari-Green EC motor is an energy-efficient motor that accepts AC input power and internally converts it to DC power. A potentiometer (dial) located on the motor enclosure allows for speed adjustment (RPM) down by up to 80%. These motors are equipped with soft-start functionality and integrated thermal and current protection. They eliminate inrush current at startup and can automatically reduce speed or shut off if overloaded or if they overheat.
Motor Configuration
| Input Voltage | 115 |
| Speed Reference | Dial on Motor |
| Permanent Dial | Yes |
Control Configuration
| Control Type | Dial on Motor |
| Transformer | None |
Wiring Diagram Description: The diagram illustrates the electrical connections for the Vari-Green motor. It shows the power input terminals, identifying connections for BLACK (15 VAC), WHITE (NEUTRAL), and GREEN (GROUND). A "VOLTAGE JUMPER CLOSED" configuration is indicated, specifying how the motor is wired for voltage. The diagram also points out the "SPEED CONTROL" dial on the motor enclosure.
Multi-Voltage Capability: The Vari-Green Motor features 'Multi-Voltage' capability. It includes a red wire designated as a 'Voltage Doubler'. When this red wire is connected, the motor operates on 115V. If the red wire is disconnected, the motor can be powered by 208-230/277V. The motor is shipped from the factory with the voltage doubler wired according to the customer's order.
