Mounting
Observe these guidelines when mounting an FX-PCV:
Important:
When the air supply to the VAV box is below 10°C (50°F), make sure that any
condensation on the VAV box, particularly on the damper shaft, does not enter the FX-
PCV electronics. Mount the FX-PCV vertically above the damper shaft to allow any shaft
condensation to fall away from the FX-PCV. Additional measures may be required in some
installations.
• Ensure that the mounting surface can support the FX-PCV and any user-supplied enclosure.
• Mount the FX-PCV on a hard, even surface whenever possible.
• Use shims or washers to mount the FX-PCV securely and evenly on the mounting surface.
• Mount the FX-PCV in an area free of corrosive vapors that matches the ambient conditions
specified in the
• Provide sufficient space around the FX-PCV for cable and wire connections and adequate
ventilation through the controller (at least 50 mm [2 in.] 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.
• When using the FX-PCV1615/1626/1628/1630 to replace an FX-PCV1610 or FX-PCV1620 controller,
plug the unused open hole in the duct work from the original FX-PCV mounting if possible. Plug
the hole using the sheet metal screw from the original installation (preferred option).
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-PCV1615/1626/1628/1630 controllers:
1. Set all the switches on the controller to their known settings.
2. Place the FX-PCV controller in the proper mounting position on the damper shaft so that the
wiring connections are easily accessible. 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:
Use the alignment marks to center the captive spacer to ensure sufficient FX-PCV
movement in either direction.
3. Secure the self-drilling No.10 screw through the captive spacer (Figure 2) with a power
screwdriver and 100mm (4in.) 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 3.5mm (9/64in.) drill bit.
Insert the mounting screw and tighten against the spacer. For the FX-PCV1628 models, use
the additional 1.25 inch screw to mount to one of the two holes provided near the actuator
opening (Figure 2) to mount the controller.
Important:
Do not overtighten the screw, or the threads may strip. If mounting to the VAV
box, make sure the screws do not interfere with damper blade movement.
3
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions
