Mounting Pickup Tubes For Pressure Assist - KMC Controls BAC-5901C-AFMS Installation Manual

Mounting Pickup Tubes for Pressure Assist

Mounting for OAD Pressure Assist
Complete these additional steps only if installing a BAC-5901C-AFMS or BAC-5901CE-AFMS for an OAD
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 outside of the outside air damper, in a location without turbulent
flow from the incoming outside air-stream.
NOTE: For example, in a corner under the outside air intake hood. (See the drawing above.)
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. Mark 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 in the mixed air chamber, in a location without turbulent air flow.
NOTE: For example, in a corner of the mixed air chamber just inside of the outside air damper. (See the
drawing above.)
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. Mark 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 8 925-019-05C