Price FFU series Installation And Service Manual page 40

FAN FILTER UNIT
INSTALLATION & SERVICE INSTRUCTIONS
STEP 2: If manually adjusting at the speed controller ensure controller is in Local Setpoint mode (L.SEt). To change modes, press
the up and down arrows simultaneously until you reach L.SEt
STEP 3: Enter the Local Setpoint value (L. Set) you have found from the chart by using the up/down buttons.
NOTE: The L.Set calculated above is a starting point; actual value may differ slightly depending on field variables.
NOTE: The BAS signal will override the local setpoint using a remote 0 – 10 VDC signal. If the BAS signal drops below 1 VDC local
control (via the up/down buttons) is restored.
The ECMDX speed controller can be controlled using multiple strategies; these are outlined in the chart below.
BAS Voltage
0 - 1 VDC Local control mode using push buttons
1 - 2 VDC
2 - 9 VDC
9 - 10 VDC
The VDC equations are based on a 1-5 Volt scale. The BAS input voltage is a 2-10 VDC scale, and therefore VDC calculated for a
given CFM using the equations (refer to ECM speed controller on page 34) must be doubled to achieve that CFM using the BAS
input.
STEP 4: Wait a few seconds for the ECM motor to adjust its speed and then verify fan airflow with measurements at the supply
outlets using a flow hood. Adjust voltage to reach desired airflow as required.
STEP 5: Proceed to balancing sections starting on page 42
38
FAN FILTER UNIT - Manual | priceindustries.com
Response
Motor Off
Modulating Control
Maximum Speed
Local setpoint can be adjusted from 0 - 100% using push buttons
Recommended sending a 1.5 VDC signal to command motor off
2 - 9 VDC modulates motor from 0 - 100%
Motor is running at maximum speed (100%)
Notes