KMC Controls BAC-5901C-AFMS Installation Manual page 9

Mounting for RAD Pressure Assist
Complete these steps only if installing a BAC-5901C-AFMS or BAC-5901CE-AFMS for a RAD pressure assist
application. (See the KMC AFMS Selection Guide for details.)
Mounting the First Airflow Pickup Tube
1. Find a location for the first pickup tube near the return air damper, on the damper's upstream side.
2. Determine the airflow direction in order to install the pickup tube so that the FLOW arrow imprint is
perpendicular to the direction of the airflow (for static pressure measurement).
NOTE: In this case, the FLOW arrow imprint can point either up or down (in a horizontal duct), or either left
or right (in a vertical duct).
NOTE: It is recommended that a marking be applied to the SSS-10xx to assure others that this
perpendicular orientation is indeed the intended orientation.
3. Cut a 7/8" (22 mm) hole in the duct to accept the pickup tube.
4. Attach the pickup tube to the sheet metal using two self-tapping screws inserted through the 3/16" (5 mm)
mounting holes.
Mounting the Second Airflow Pickup Tube
1. Find a location for the second pickup tube near the return air damper, on the damper's downstream (i.e.
mixed air) side.
2. Determine the airflow direction in order to install the pickup tube so that the FLOW arrow imprint is
perpendicular to the direction of the airflow (for static pressure measurement).
NOTE: In this case, the FLOW arrow imprint can point either up or down (in a horizontal duct), or either left
or right (in a vertical duct).
NOTE: It is recommended that a marking be applied to the SSS-10xx to assure others that this
perpendicular orientation is indeed the intended orientation.
3. Cut a 7/8" (22 mm) hole in the duct to accept the pickup tube.
4. Attach the pickup tube to the sheet metal using two self-tapping screws inserted through the 3/16" (5 mm)
mounting holes.
TrueFit Airflow Measurement System Installation Guide 9 925-019-05C