Mounting and Wiring VMA1200 Series Controllers Technical Bulletin
11
Mounting the VMA
To mount the VMA:
1.
Place the VMA in the desired mounting position on the damper
shaft so the wiring terminals are easily accessible.
To allow space for VMA movement during damper rotation,
locate the shoulder washer at the center of the slot.
Make sure the VMA is parallel and mounted flat with the VAV
box. If needed, use a spacer to offset tipping of the VMA created
by shaft bushings that protrude beyond the box surface.
2.
Secure the self-drilling No. 10 screw provided into the VMA
mounting slot, using a power screwdriver and socket with 4 in.
extension.
Alternate mounting:
1.
Perform Step 1 as shown previously.
2.
Use a punch to mark the position of the shoulder washer, then
drill a hole into the VAV box through the mark using a 3.5 mm
(9/64 in.) bit.
3.
Position the VMA so the shoulder washer is over the hole; insert
the mounting screw and tighten against the washer.
Note:
The mounting screw is threaded into sheet metal and the
threads can strip. Do not overtighten. Make sure the screw does not
interfere with full damper rotation.
Shoulder
Washer
Mounting
Screw
Mounting Slot
Mount
Bar Code
(Neuron ID)
Phone Jack
(for Sensor)
Service Pin
(Broadcasts
Neuron ID)
Figure 4: Mounting Screw with Shoulder Washer