Greenheck Fan Vektor-H Applications with Variable Frequency Drive VFD, Pre-Start-Up Checks

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Vektor-H Applications with Variable Frequency Drive (VFD)

For Vektor systems with single-point, three-phase wiring per blower, the isolation damper actuator will be powered via a step-down transformer, which is wired to the fan disconnect, as shown in the wiring diagrams on page 7.

If fan flow (motor speed) is to be controlled using a variable frequency drive with this wiring, the reduced voltage and frequency supplied to the fan will cause control problems with the isolation damper actuator.

When a project’s Vektor control sequence requires the use of a VFD, it is suggested that the control contractor supply the isolation damper actuator voltage, independent of the power supplied to the Vektor fan motor.

NOTE

For Vektor-HS fans provided from the factory with a VFD, refer to the Vektor-HS SAVVE controls Installation, Operation and Maintenance Manual for electrical wiring and connection information.

Pre-Start-Up Checks

Check all fasteners for tightness.

Check radial gap, overlap and wheel alignment. The wheel should be aligned as shown. Although the wheel position is preset and the unit is test run at the factory, movement may occur during shipment.

The radial gap should be consistent at all locations between the centrifugal wheel and the inlet cone. Centering may be accomplished by loosening the inlet cone bolts and repositioning the inlet cone.

To obtain the optimum performance, the centrifugal

wheel must overlap the inlet

Wheel

cone. Adjustments can be

 

made by loosening the set

Inlet

Cone

screws in the wheel and

A

moving the wheel to the

Overlap

desired position.

 

Wheel rotation should

Radial Gap

 

be in the same direction

 

as the rotation decal affixed to the unit. (Clockwise rotation is correct as viewed from fan inlet). For 3-phase installations, fan rotation can be reversed by simply interchanging any two of the three electrical leads. For single phase installations, follow the wiring diagram located on the motor.

NOTE

Any increase in fan speed represents a substantial increase in horsepower required from the motor. Always check motor load amperage and compare to nameplate rating when changing fan speed.

Unit

 

Inlet Cone to Backplate

 

 

 

 

 

 

 

A Dimension

A Dimension

Size

± Tolerance (in.)

± Tolerance (mm)

 

9

3 3/16

 

± 1/8

81

 

± 3

 

 

 

 

 

 

 

10

3 7/16

 

± 1/8

87

 

± 3

 

 

 

 

 

 

 

12

4

 

± 1/8

102

 

± 3

13

4 7/16

 

± 1/8

113

 

± 3

 

 

 

 

 

 

 

16

5 7/16

 

± 1/8

138

 

± 3

18

6 3/8

 

± 1/8

162

 

± 3

 

 

 

 

 

 

 

22

7 13/16

 

± 3/16

198

 

± 5

 

 

 

 

 

 

 

24

8 5/8

 

± 1/4

219

 

± 6

30

10 9/16

 

± 3/8

268

 

± 10

36

12 3/4

 

± 3/8

324

 

± 10

 

 

 

 

 

 

 

Radial Gap is adjusted by loosening the inlet cone bolts and centering the cone on the wheel. If additional adjustment is required to maintain a constant radial gap, loosening the bearing bolts and centering the wheel is acceptable as a secondary option.

Overlap or offset, is adjusted by loosening the wheel hub from the shaft and moving the wheel to the desired position along the shaft. The transition between the inlet cone and wheel should be as shown; there is a smooth feel to the profile when moving from one component to the other.

8 Laboratory Exhaust System

®

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Contents Table of Contents General Safety InformationInspection and Maintenance during Storage ReceivingUnpacking HandlingGeneral Information Lifting Information Roof Curb and Mounting DetailsDuct Installation System AssemblyStack Extensions Bottom Inlet Duct ConnectionKitchen Roof Mounting Installation MaintenanceTypical Commercial Kitchen Installation Grease TrapPositive Pressure Trap on Tubular Fan Housing Plenum Drainage Piping / Trap Detail By OthersElectrical Connections Negative Pressure Trap on Bypass Air PlenumPre-Start-Up Checks Unit Inlet Cone to Backplate Dimension SizeVektor-H Applications with Variable Frequency Drive VFD Maintenance Vektor-HS Nozzle Bearings Damper ActuatorsVektor-H and Vektor-HS Exhaust Fan Parts List and Assembly Vektor-HS Nozzle Parts List and AssemblySide View Top View Quantity Description Transition WeldMaintenance Log Our Commitment

Vektor-HS, Vektor-H specifications

Greenheck Fan Corporation, a leader in air movement and control equipment, has developed the Vektor-H and Vektor-HS series to meet the growing demands for energy efficiency and performance in commercial and industrial ventilation systems. These models are specifically designed to provide optimal airflow while minimizing energy consumption.

The Vektor-H model stands out with its innovative backward-inclined centrifugal fan wheel, which effectively handles air volumes ranging from 1,000 to 150,000 CFM. This design minimizes turbulence and enhances performance, ensuring quiet operation even at high speeds. The Vektor-H also features a direct drive option that eliminates the need for belts and sheaves, reducing maintenance while increasing reliability. The inclusion of a high-efficiency motor further exemplifies its commitment to energy savings.

On the other hand, the Vektor-HS, or High-Static version, is designed for applications requiring higher static pressure. This capability makes it ideal for systems where long duct runs or highly restrictive applications are involved. With airflow capabilities similar to the Vektor-H, the Vektor-HS is capable of operating efficiently in conditions that demand advanced pressure performance.

Both models come equipped with Greenheck’s advanced controls and monitoring systems, which provide real-time data on performance metrics. These features allow facility managers to optimize the system based on actual operating conditions, thereby improving energy efficiency and reducing operational costs.

Technologically, the Vektor-H and Vektor-HS series utilize advanced acoustic design principles, which significantly reduce noise levels. The application of sound-dampening materials and strategically designed fan casings helps in achieving a quieter working environment, addressing one of the common concerns in HVAC systems.

Furthermore, the Greenheck Vektor series is built with durability in mind. The construction involves heavy-gauge steel and corrosion-resistant finishes, ensuring long-lasting performance even in harsh environments. Both the Vektor-H and Vektor-HS are also customizable, allowing for modifications to meet specific application requirements, such as different mounting configurations and discharge orientations.

In summary, the Greenheck Vektor-H and Vektor-HS series represent the fusion of advanced technology with practical applications, resulting in efficient, durable, and quiet ventilation solutions suitable for a variety of industrial and commercial settings. These models not only address the current needs for energy efficiency and performance but also position users favorably for future advancements in HVAC technology.