16
VGN Technology
®
On/Off Unit
ON/OFF UNIT
Because no content exists under the On/Off Unit menu, only the end screen is
displayed.
NOTE: END LOOP
screen will display anytime there is no content for menu
selection.
STATUS
END
STATUS LOOP MASK
TEST
AND
BALANCE - F
AN
1
From the
User Settings
screen, access the
Test and Balance
screen(s) by
pressing the down arrow.
IMPORTANT:
The fan must be ON in order to begin the test and balance
procedure.
Fan 1 Mode
is used to place Fan 1 into TEST mode. Press enter to advance the
cursor to the fan mode, then use the arrow keys to switch modes. Press enter.
Upon entering the TEST mode, the user is able to override the nozzle position
for that fan and apply a K VALUE ADJUSTMENT, resulting is a modified flow
reading. The fan flow reading adjustment will only update once the K VALUE
ADJUSTMENT is complete (by pressing enter). The mode will automatically return
to AUTO after 120 minutes. In the AUTO mode, only the fan mode and fan flow are
displayed. To display/edit the nozzle position and K value, enter the TEST mode.
Fan 1 Flow
represents the volumetric flow for Fan 1. The flow reading will be
updated as the K VALUE ADJUSTMENT is applied.
Nozzle 1 Position
is the overridden position of the nozzle during testing. The user
may edit this position as needed during the test mode.
K Value Adjustment
allows the user to apply an offset (+/-) to the factory K Value.
The result of such an offset is a modified volumetric flow reading, intended to
match the desired number from the test and balance procedure.
The displayed CFM on the control screen should match the measured CFM of the
fan while actively performing Test & Balance.
Test and Balance - Fan 2, Fan 3, Fan 4 same as above if applicable.
T&B FAN 1
FAN 1 MODE:
TEST
FAN 1 FLOW:
1465 CFM
NOZZLE 1 POS:
100 PCT
K VALUE ADJ:
0
USER SETTINGS
Elevation
allows the user to input the proper elevation for their specific region.
The elevation is used to more accurately compute the density of the air, a
component in determining the volumetric airflow of the fan.
Maximum Output Velocity
defines the desired output velocity of the variable
geometry nozzle under normal operating conditions.
Minimum Output Velocity
defines an alternate (reduced) output velocity based
on the hard wired 0-10 VCD input dedicated to that function. For this function,
0 VDC represents the normal output velocity setpoint while 10 VDC represents the
alternate setpoint with a linear relationship between 0-10 VDC.
USER SETTINGS
ELEVATION: 0
FT
MAX OUT VEL:
3400 FPM
MIN OUT VEL:
2000 FPM
ACTIVE STPT:
3000 FPM
FOR TEST/BALANCE
PRESS DOWN ARROW
VELOCITY
VDC
0 10
3400
2000
Set Points
