Installation
For units utilizing the VAV option, install a field supplied 1/4-inch push-on tube to the return air side
of the unit. Pass the tube through the opening on the side of the corner post adjacent to the VFD
controls, and connect to the negative (LOW) side fitting.
Install a field supplied Pitot tube in the supply duct as required, run 1/4-inch push-on tube to
the corner post opening, and connect to the positive (HIGH) side fitting. Where possible, it is
recommended to have the pitot tube located a minimun of 6ft away from the supply discharge and
located centrally in the supply duct.
Figure 6: Connecting negative and positive side fittings
Check that the tubes are secure inside the duct and firmly connected to transducer fitting. If they
are not, the unit will not operate as intended.
15
VFD for D-Series (DSV/DSH) Air-cooled Self-Contained Units, and C-Series (CSV) Water-Cooled Self-Contained Units,
C-Gen
Johnson Controls
