• One self-drilling No. 10 x 25 mm (1 in.) screw
Materials and special tools needed
• Small, straight-blade screwdriver for securing wires in the terminal blocks
• 8 mm (5/16 in.) wrench or 10 mm (3/8 in.) 12-point socket to tighten the square coupler bolt
• Several shims or washers to mount the CVM
• Power screwdriver, 100 mm (4 in.) extension socket, punch, drill, and 3.5 mm (9/64 in.) drill bits to
mount the CVM
• Pliers to open and close the damper
• Required length of 3.97 mm (5/32 in.) ID pneumatic tubing and barbed fittings
Mounting
Observe the following guidelines when mounting a CVM controller:
• Ensure that the mounting surface can support the CVM and any user-supplied enclosure.
• Mount the CVM on a hard, even surface whenever possible.
• Use shims or washers to mount the CVM securely and evenly on the mounting surface.
• Mount the CVM in an area free of corrosive vapors that matches the ambient conditions specified
in the Technical specifications section.
• Provide sufficient space around the CVM 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 CVM in areas where electromagnetic emissions from other devices or wiring
can interfere with controller communication.
• Avoid mounting the CVM on surfaces with excessive vibration.
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 CVM
electronics. Mount the CVM vertically above the damper shaft to allow any shaft condensation
to fall away from the controller. Additional measures may be required in some installations.
On panel or enclosure mount applications, observe these additional guidelines:
• Do not install the CVM in an airtight enclosure.
• Mount the CVM so that the enclosure walls do not obstruct cover removal or ventilation through
the controller.
• Mount the CVM so that the power transformer and other devices do not radiate excessive heat to
the controller.
To mount the CVM controllers, complete the following steps:
1. Set all the switches on the equipment controller to their known settings.
3F4-CVM VAV Terminal Equipment Controllers Installation Instructions
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