Mounting - BCPro - Part No. 24-10143-01663 - Field Device - PCV: Programmable VAV Box Controller

CH-PCV1930 VAV Controller Installation Instructions

Product name
PCV: Programmable VAV Box Controller
Document type
Installation Guide
Document number
Part No. 24-10143-01663
Document revision
Revision date

Observe the following guidelines when mounting CH-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 CH-PCV electronics. Mount the CH-PCV vertically above the damper shaft to allow any shaft condensation to fall away from the CH-PCV. Additional measures may be required in some installations.
  • Ensure that the mounting surface can support the CH-PCV and any user-supplied enclosure.

  • Mount the CH-PCV on a hard, even surface whenever possible.

  • Use shims or washers to mount the CH-PCV securely and evenly on the mounting surface.

  • Mount the CH-PCV in an area free of corrosive vapors that matches the ambient conditions specified in the Technical Specifications section.

  • Provide sufficient space around the CH-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 CH-PCV in areas where electromagnetic emissions from other devices or wiring can interfere with controller communication.

  • Avoid mounting the CH-PCV on surfaces with excessive vibration.

On panel or enclosure mount applications, observe these additional guidelines:

  • Do not install the CH-PCV in an airtight enclosure.

  • Mount the CH-PCV so that the enclosure walls do not obstruct cover removal or ventilation through the controller.

  • Mount the CH-PCV so that the power transformer and other devices do not radiate excessive heat to the controller.

To mount the CH-PCV controllers, complete the following steps:

  1. Set all the switches on the controller to their known settings.
  2. Place the CH-PCV controller in the proper mounting position on the damper shaft so that the wiring connections are easily accessible. Make sure the CH-PCV controller base is parallel to the VAV box (perpendicular to the damper shaft). If needed, use a spacer to offset tipping of the CH-PCV controller caused by the shaft bushings.
    Note: Use the alignment marks to center the captive spacer to ensure sufficient movement in either direction.
  3. Secure the self-drilling No. 10 screw through the captive spacer (Figure 1) 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 spacer.
    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.
  4. Locate the damper position using the typical marking on the end of the damper shaft as shown in the following figure.
    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 and turn the 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. For 45° and 60° boxes, hard stops must be provided at both full-closed and full-open damper positions. By installing the CH-PCV controller at the full-open position, the CH-PCV controller provides the open stop for 45° and 60° boxes. The closed damper seal provides the full-closed stop.
  8. All models are compact in size and can be easily installed on VAV boxes. The 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).
  9. 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 CH-PCV controller and the other ends of the tubing to the pressure transducer in the VAV box application ).
    Note: The CH-PCV uses a digital non-flow pressure sensor (all models except the ) with bidirectional flow operation. You can connect the high- and low-pressure DP tubes to either barbed fitting on the CH-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 CH-PCV.
  10. 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.
  11. Complete the mounting by rotating the damper to the full-open position.
  • Risk of Property Damage
  • Rotate the damper to the full-open position before starting the air handler. Failure to rotate the damper to the full-open position may result in damage to the VAV box or ductwork when the air handler is started.
  • Risque de dégâts matériels
  • Faire pivoter le registre pour le placer en position d'ouverture complète avant de démarrer l'unité de traitement d'air. Le non-respect de cette directive risque d'endommager le caisson de l'unité à volume d'air variable (VAV) ou le réseau de conduites au démarrage de l'unité de traitement d'air.