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Greenheck Vektor - User Manual

Greenheck Vektor
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DANGER
Always disconnect power before working on or
near a unit. Lock and tag the disconnect switch or
breaker to prevent accidental power up.
CAUTION
When servicing the unit, variable frequency drives
(VFD) may be hot enough to cause pain or injury.
Allow motor to cool before servicing.
General Safety Information
Only qualified personnel should install this unit.
Personnel should have a clear understanding of these
instructions and should be aware of general safety
precautions. Improper installation can result in electric
shock, possible injury due to coming in contact with
moving parts, as well as other potential hazards. Other
considerations may be required if high winds or seismic
activity are present. If more information is needed,
contact a licensed professional engineer before moving
forward.
1. Follow all local electrical and safety codes, as well as
the National Electrical Code (NEC), the National Fire
Protection Agency (NFPA), where applicable. Follow
the Canadian Electrical Code (CEC) in Canada.
2. Do not allow the power cable to kink or come in
contact with oil, grease, hot surfaces, or chemicals.
Replace cord immediately if damaged.
3. Verify the power source is compatible with the
equipment.
Table of Contents
General Safety Information ......................1
Receiving, Handling and Storage .................2
Component Checklist - Electrical ...............2
System Components ...........................3
Wiring Installation .............................3
Fan Operation - Single Fan
Set Point and Minimum Variables ...............4
Defined Modes .............................4
VGN Technology Control Flow Chart ............5
Fan Operation - Multiple Fans, No Staging
Set Point and Minimum Variables ...............6
Defined Modes ........................... 6-7
VGN Technology Control Flow Chart ............8
Fan Operation - Multiple Fans, With Staging
Set Point and Minimum Variables ...............9
Defined Modes ............................10
VGN Technology Control Flow Chart ...........11
Factory-Supplied Variable Frequency Drive
System Diagram .............................12
Wiring Diagram ..............................13
Communication BACnet® and LonWorks® Protocol . 14
Start-Up Procedure - Electrical Controls ..........15
System Test and Balance for VGN ...............16
Nozzle Velocity Adjustment .....................16
Customer-Supplied Variable Frequency Drive
System Diagram .............................18
Wiring Diagram ..............................19
VGN Nozzle Controller Intro. and Tutorial ....... 20-22
Communication ..............................23
Start-Up Procedure - Electrical Controls ..........24
System Test and Balance for VGN ...............25
Nozzle Velocity Adjustment .....................25
Troubleshooting ..............................26
Maintenance ................................27
Electrical Replacement Parts ...................27
Our Commitment .............................28
VFD Controller Nozzle Controller
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 instructions could result in personal injury and/or property damage!
1
VGN Technology
®
®
Document 476072
Vektor
®
Laboratory Exhaust
with Variable Geometry Nozzle (VGN) Technology
Electrical Controls Information

Table of Contents

Questions and Answers

  • L
    Lisa ClarkJul 31, 2025
    What to do if CFM reading is low on Greenheck Vektor?
    • M
      Mitchell Campbell MDJul 31, 2025
      If the CFM reading on your Greenheck Ventilation Hood is low or at zero even though the fan is running, the isolation damper might not be open. Check the power at the isolation damper and determine if it is open. There could be a Sure-Aire tubing leak or blockage; inspect the tubing and blow it out with air. The Sure-Aire tube lines might be hooked up backwards, so flip the high and low tube lines. The Sure-Aire transducer for the system could be bad; test the voltage with a meter for 24V and the output signal. Also, ensure that all laboratory hoods are open and verify operation, as closed hoods can cause low CFM readings.
  • A
    aaronsimpsonAug 4, 2025
    Why does my Greenheck Ventilation Hood system have a negative pressure condition?
    • C
      Catherine HunterAug 4, 2025
      If your Greenheck Ventilation Hood system has an unfavorable negative pressure condition, check the BMS control to determine if the condition is occurring at fan low speed and bypass full open, as the BMS fan control might not be working properly. Also, verify the power and signal at the duct pressure transducer(s), as there could be a duct pressure transducer failure. Verify the bypass damper operation as well.
  • A
    Anthony BurkeAug 8, 2025
    How to troubleshoot Greenheck Vektor Ventilation Hood when fan runs but no pressure in duct?
    • M
      mercedesbrowningAug 8, 2025
      If the fan in your Greenheck Ventilation Hood is running but no pressure is being created in the duct, the isolation damper may not be open. Check the power at the isolation damper and determine if it is open. Alternatively, the bypass damper might be open, so verify that the bypass damper is closed.
  • C
    christophermooneyAug 12, 2025
    What to do if Greenheck Vektor nozzle actuator is not responding?
    • D
      daniel20Aug 13, 2025
      If the nozzle actuator on your Greenheck Ventilation Hood isn't responding to fan speed changes, the Sure-Aire transducer might not be reading airflow. Inspect the pressure tubing to the transducer and verify the voltages. Also, check for power and signal at the actuator, as there might be no power at the nozzle actuator. Low CFM due to closed laboratory hoods can also cause this issue; open all laboratory hoods to verify nozzle operation.
  • P
    Patricia FordAug 17, 2025
    Why is my Greenheck Ventilation Hood fan speed unstable?
    • M
      Mrs. Erica Villanueva MDAug 17, 2025
      If your Greenheck Ventilation Hood is experiencing unstable fan conditions where the fan isn't balancing the system and keeps changing speed, the BMS PID timing may be incorrect. In this case, increase the time functions in the system. Another possible cause is incorrect BMS PID overlap; create an increased dead band between the PID for the fan and bypass.
  • L
    Lauren MedinaAug 21, 2025
    What does it mean when the alarm contact on my Greenheck Vektor Ventilation Hood nozzle controller is active?
    • H
      Hector GreenAug 22, 2025
      If the alarm contact on the nozzle controller of your Greenheck Ventilation Hood is “Active”, it could be because the velocity is below the required preset value. This indicates that the fan speed is too low and not creating enough airflow, so speed up the fan. Another possibility is that the fan is running, but no flow is being created. In this case, airflow is not present, so check the flow station and components.
  • A
    Alexander WaltonOct 26, 2025
    Why is my Greenheck Ventilation Hood system experiencing a positive pressure condition?
    • T
      Tanya BrownOct 26, 2025
      If your Greenheck Ventilation Hood system has a positive pressure condition, several factors could be the cause. It could be due to a failure of the duct pressure transducer, in which case you should verify the power and signal at the duct pressure transducer(s). The isolation damper may not be open, so check the power at the isolation damper and determine if it is open. The BMS fan control may not be working properly; check the BMS control and determine if the condition is occurring at full speed and the bypass is closed. A broken fan belt can also cause this issue, so check the fan belt for failure. Verify the bypass damper is closed, and replace any missing access panels on the fan or bypass air plenum. Finally, check the actuator power and signal, as the nozzle might not be operating a...

Summary

General Safety Information

General Electrical Controls Information

Receiving

Process of accepting product delivery and checking for items and damage.

Unpacking

Verifying all required parts and correct quantity have been received upon unpacking.

Handling

Proper methods to avoid scratching or chipping the unit's coating.

Storage and Handling Precautions

Guidelines for storing units, including inspection and removal from storage precautions.

System Components

System Components (supplied by Greenheck)

List of electrical components provided by Greenheck for VGN systems.

System Components (customer-supplied)

List of electrical components to be supplied by the customer for VGN systems.

Wiring Installation

Fan Operation - Single Fan

Set point and minimum variables

Defines parameters for fan speed and nozzle control for single fan operation.

Definition of typical operation modes

Describes operational states like Unoccupied, Occupied, and Fault mode for single fan systems.

VGN Technology Control Flow Chart - Single Fan

Fan Operation - Multiple Fans, No Staging

Set point and minimum variables

Parameters for fan speed and nozzle control in multi-fan, non-staging systems.

Definition of typical operation modes

Outlines operational modes for multiple fans without staging.

VGN Technology Control Flow Chart - Multiple Fans, No Staging

Fan Operation - Multiple Fans, With Staging

Set point and minimum variables

Defines fan speed and nozzle control parameters for staged multi-fan systems.

Two or more fans running, normal operation

Describes fan behavior when multiple units are operating and staged.

Dead band in system

Addresses issues of undesirable fan cycling and bypass damper use.

VGN Technology Control Flow Chart - Multiple Fans, With Staging

Factory-Supplied Variable Frequency Drive

System Diagram

Illustrates the system layout for factory-supplied VFD controls.

Wiring Diagram

Details the electrical connections for factory-supplied VFD systems.

Communication

Explains BACnet MS/TP and LonWorks communication setup for VFDs.

Start-Up Procedure - Electrical Controls

Mechanical Component System Verification

Checks mechanical aspects before electrical start-up.

Electrical Control Components System Verification

Verifies electrical connections and controls before start-up.

Electrical System Start-Up for VGN

Step-by-step guide for safely starting up the VGN electrical system.

System Test and Balance for VGN

Procedures for setting fan speed and nozzle area for system balancing.

Nozzle Velocity Adjustment

Steps to adjust the nozzle velocity range for the VGN system.

VGN Nozzle Controller

Controller Introduction and Tutorial

Overview and basic operation of the VGN nozzle controller interface.

Keypad Navigation

Explanation of the controller's buttons and their functions.

Example of Parameter Adjustment

Demonstrates how to adjust parameters on the nozzle controller display.

Controller Menu Screens

Details the different menu screens available on the nozzle controller.

GREENHECK VGN DIAGNOSTIC

Information on diagnostic menu for checking system input/output status.

Communication

Details BMS points for Nozzle Controller with customer-supplied VFD.

Start-Up Procedure - Electrical Controls (Customer-Supplied VFD)

System VFD (customer-supplied)

Start-up steps specific to customer-supplied VFDs.

Nozzle Controller Setup

Procedures for setting up the nozzle controller with customer-supplied VFD.

System Start-Up

General system start-up procedures including fan and nozzle operation.

System Test and Balance for VGN

Procedures to test and balance the VGN system with customer-supplied VFD.

Nozzle Velocity Adjustment

Steps to adjust nozzle velocity using the VGN controller.

Troubleshooting

General

Common issues and recommended actions for general system problems.

VGN Factory-Supplied VFD

Troubleshooting specific to factory-supplied VFDs.

VGN Nozzle Controller Customer-Supplied VFD

Troubleshooting for nozzle controllers with customer-supplied VFDs.

VGN Technology Maintenance

VGN Technology Electrical Replacement Parts

List of electrical components and their manufacturer part numbers for replacement.

Our Commitment

Greenheck Vektor Specifications

General IconGeneral
CategoryVentilation Hood
BrandGreenheck
ModelVektor
Mounting TypeRoof-mounted
Filter Typegrease, particulate

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