Green Flow GF-A1000-DI, GF-A1001-DI
INSTALLATION GUIDE
–ANALOG OUTPUT THERMAL DISPERSION AIRFLOW
MEASURING DEVICE
10
GreenTrol Automation • 156 Holly View Lane., Loris SC 29569 • Toll Free: 877.4GNTROL (446.8765) • Fax: 877.425.2026 • Internet: GreenTrol.com
6GF-A1000-DI/GF-A1001-DI INITIAL START UP / NORMAL OPERATION
The following procedure is intended for initial startup of the instrument. Following the initial set up, no further user activity is
required during normal operation.
1.Remove the cover to the electronics enclosure by removing the four screws on the cover.
2.Make sure that the 24VAC circuit breaker used to power the GF-A1000-DI/GF-A1001-DI is turned OFF until all wiring is
complete!
3.Confirm 24VAC connection from the power source to the GF-A1000-DI/GF-A1001-DI 24VAC wire (red wire) as
outlined in the GF-A1000-DI
24VAC Power Connections section of this document.
4.Confirm common ground 24VAC and signal ground connection from the power source to the GF-A1000-DI at the black
wire.
5.Confirm GF-A1000-DI/GF-A1001-DI analog airflow (and temperature for GF-A1001-DI) signal output connections at the
white wire (and green
wire for GF-A1001-DI), to the analog input of the BAS as outlined in GF-A1000-DI/GF-A1001-DI
Analog Output Connections section of this document. Note that the ground of the BAS must be at the same voltage
reference as the ground of the GF-A1000-DI/GF-A1001-DI and the
power source.
6.Set the desired analog output options using CONFIG switches SW1 to SW4 as outlined in the GF-A1000-DI/GF-A1001-
DI Analog Output
Option Switch Settings section of this document.
7.Activate the 24VAC power source to power on the GF-A1000-DI/GF-A1001-DI.
8.Following a brief instrument initialization, the green Activity LED will continuously flash ON for 1 second, then OFF
for
1 second. This indicates normal operation. In the event of a sensor fault, the LED will produce longer continuous flashes
ON for 2 seconds, and OFF for 2 seconds.
9.Confirm that the BAS is receiving the analog output signals that indicate instrument airflow (or equivalent velocity
pressure) and temperature.
10.Replace the GF-A1000-DI/GF-A1001-DI electronics enclosure cover and secure with the four screws removed in step 1.
Converting the Analog Airflow Output Signal from Linear to Volumetric flow - FPM to CFM
The analog airflow output can be converted from velocity (FPM) to an equivalent volumetric flow (CFM) by multiplying the
indicated
flow velocity by the free area of the sensor installed location (in square feet). For example, with the GF-A1000-DI/GF-A1001-
DI
installed in a 12 inch round duct, using the 0-10VDC scale and 3,000 FPM full scale output range options; an airflow output
of 5VDC indicates a flow velocity of 1,500 FPM (5VDC is one-half of the 0-10VDC output, corresponding to half of
the 0-3,000
FPM scale; and equals 1,500 FPM). The GF-A1000-DI/GF-A1001-DI installed duct location area in this example is calculated
at
0.785 ft
2
(using Pi x duct radius
2
, or 3.14 x 0.5ft
2
). Multiplying the indicated instrument output of 1,500 FPM by the duct
free
area of 0.785 ft
2
yields an equivalent volumetric flow of 1,177.5 CFM.
7GF-A1000-DI ADDITIONAL INFORMATION
For additional information, contact your local Greentrol representative or our Technical Support Team at 877.4GNTROL
(1.877.446.8765).
IG_GF-A1000-DI
_R1A
