4. Locate the damper position using the typical marking on the end of the damper shaft as
shown in the figure below.
Figure 1: Typical damper end shaft icons
5. Note the direction, clockwise (CW) or counterclockwise (CCW), required to close the damper.
Grasp the damper shaft firmly with pliers, and either manually close the damper for 90° boxes
or manually open the damper for 45° or 60° boxes.
6. Push down and hold the Manual Override button (Figure 2) and turn the FX-PCV controller
coupler until it contacts the mechanical end-stop at either the full-closed (90° boxes) or full-
open (45° and 60° boxes) position.
7. If the damper for a 90° box closes CCW, rotate the coupler to the CCW mechanical limit. If the
damper for a 90° box closes CW, rotate the coupler to the CW mechanical limit. The open end-
stop is automatically set for 90° boxes.
8. For 45° and 60° boxes, hard stops must be provided at both full-closed and full-open
damper positions. By installing the FX-PCV controller at the full-open position, the FX-PCV
controller provides the open stop for 45° and 60° boxes. The closed damper seal provides
the full-closed stop.
9. All models are compact in size and are easily installed on VAV boxes. The FX-
PCV1615/1626/1630 models have either a round shaft up to 13 mm in diameter or a 10 mm
square shaft. Tighten the square coupler bolt to the shaft using an 8 mm (5/16 in.) wrench or
10 mm (3/8 in.) 12-point socket. Tighten to 10.5 to 11.5 N·m (95 to 105 lb·in).
10. Skip this step if you are installing the FX-PCV1626 model. Loop the pneumatic tubing (supplied
by field personnel) to include a trap for condensation. Attach the needed length of tubing
(supplied and installed by field personnel) to the dual port fitting on the FX-PCV controller and
the other ends of the tubing to the pressure transducer in the VAV box application (Figure 2).
Note:
The FX-PCV uses a digital non-flow pressure sensor (all models except the FX-
PCV1626) with bidirectional flow operation, which allows you to connect the high- and low-
pressure DP tubes to either barbed fitting on the FX-PCV controller. You do not need to
make a specific high- or low-side connection when you attach the tubing to the barbed
fittings on the FX-PCV.
11. Push the Manual Override button, and turn the actuator coupling manually to ensure that the
actuator can rotate from full-closed to full-open positions without binding.
12. Complete the mounting by rotating the damper to the full-open position.
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions
4
