Start-Up Procedure - Electrical Controls - Greenheck Vektor Installation, Operation And Maintenance Manual

Electrical Controls Information for Factory-Supplied Variable Frequency Drive

Start-Up Procedure - Electrical Controls

The following start-up procedure is to be completed
in order to verify that the fan is in working order.
It does not cover the details for test and balance,
VFD programming, commissioning, or system
troubleshooting which is covered in other parts of the
Installation, Operation and Maintenance Manual.
Mechanical Component System Verification
For detailed descriptions to complete these operations,
see equipment Installation, Operation and Maintenance
Manual (IOM).
 Fan assembly and installation completed.
 Check all fasteners for tightness, as they may loosen
during shipping.
 All pressure tubing lines installed as required.
 All control enclosures and devices mounted in the
appropriate locations.
 Verify fan wheel alignment.
Electrical Control Components System
Verification
For detailed descriptions to complete these operations,
see equipment Installation, Operation and Maintenance
Manual, National Electrical Code and local electrical
code.
 Service feeder(s) to all controls completed.
 Control wiring to all devices completed.
 All field electrical connections tested and torqued.
 Communication wiring to Building Management
System completed.
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Electrical System Start-Up for VGN
Use appropriate electrical safety gear as required.
 Make sure disconnect switch at the VFD is in the
'OFF' position.
 Verify each power phase at the VFD disconnect is
not shorted to ground using a voltmeter.
 Turn on the breaker that feeds the fan VFD.
 Verify the voltage is correct from phase to phase
using a voltmeter at the VFD disconnect.
 Apply power to the VFD by turning on the disconnect
switch that is interlocked to the door.
 Verify that the VFD is in the 'OFF' mode at the VFD
keypad.
 Check control voltage at drive terminals to verify the
control voltage is correct.
 Turn on the service disconnect switch at the fan.
 Open all lab hoods inside the building and verify duct
control is operational.
 Note the fan speed at the VFD keypad; it should be
at full speed.
• Increase fan speed if required using the VFD
keypad up and down arrows.
 Press the 'HAND' button at the VFD keypad.
• The isolation damper will start to open.
• The fan speed will start to accelerate to full
speed.
• As the fan speed increases the nozzle will open
to maintain constant velocity.
 Verify fan wheel rotation. Verify it matches labeled
direction and IOM.
• If the fan wheel is rotating in the wrong direction,
turn off fan, disconnect power, and lockout main
feeder.
• Reverse two of the motor wiring leads to change
wheel direction.
 Reapply power and press 'HAND' mode once again
at the VFD keypad.
 Verify fan wheel rotation, verify it matches labeled
direction and fan Installation, Operation and
Maintenance Manual.
 Use the up and down arrows at VFD keypad, change
the speed to verify nozzle reaction.
- As speed increases the nozzle will open.
- As speed decreases the nozzle will close.
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VGN Technology