• Provide sufficient space around the FX-PCV for cable and wire connections and adequate
ventilation through the controller (50 mm [2 in.] minimum on the top, bottom, sides, and front of
the controllers).
• Do not mount the FX-PCV in areas where electromagnetic emissions from other devices or wiring
can interfere with controller communication.
• Avoid mounting the FX-PCV on surfaces with excessive vibration.
On panel or enclosure mount applications, observe these additional guidelines:
• Do not install the FX-PCV in an airtight enclosure.
• Mount the FX-PCV so that the enclosure walls do not obstruct cover removal or ventilation
through the controller.
• Mount the FX-PCV so that the power transformer and other devices do not radiate excessive heat
to the controller.
To mount the FX-PCV18 Series controller, complete the following steps:
1. Place the FX-PCV18 Series controller in the proper mounting position on the damper shaft so
that the wiring connections are easily accessible.
Note:
The line from the captive spacer and screw through the center of the damper shaft
must be either horizontal or vertical, and the wall plate must be wall-mounted to comply
with UL requirements. See the following figure for possible mounting positions.
Figure 1: Possible FX-PCV18 series controller mounting positions
Make sure the FX-PCV controller base is parallel to the VAV box (perpendicular to the damper
shaft). If needed, use a spacer to offset tipping of the FX-PCV controller caused by the shaft
bushings.
Note:
Using the alignment marks to center the captive spacer ensures sufficient FX-PCV18
controller movement in either direction.
2. Secure the self-drilling No. 10 screw through the shoulder washer (Figure 3) with a power
screwdriver and 100 mm (4 in.) extension socket. Otherwise, use a punch to mark the position
of the shoulder washer, and then drill a hole into the VAV box using a 3.5 mm (9/64 in.) drill bit.
Insert the mounting screw and tighten against the washer.
Important:
Do not overtighten the screws, or the threads may strip. If mounting to the
VAV box, make sure the screws do not interfere with damper blade movement.
3
FX-PCV1826/1832 Programmable VAV Box Controller Installation Instructions
