IOM-EZVAVINST
Date: 10-2016
Supersedes: 7-2016
Nailor reserves the right to change any information concerning product or specification without notice or obligation.
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Installation and Operation Manual
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EZvav Digital Controls
Figure 2-1 Controller rotation limit selections
To set the rotational limits, do the following:
1. Turn the controller over so you have access to the back.
2. Manually rotate the actuator fully clockwise as viewed from the back.
3. Remove the stop screw from its storage location and clean any debris from the threads.
4. Insert the screw into the correct stop position hole.
5. Tighten the screw only until the head touches the plastic in the bottom of the recess.
Mounting on a VAV Terminal Unit
Mount the controller inside of a metal enclosure. To maintain RF emissions specifications, use either shielded connecting cables
or enclose all cables in conduit.
Mount the controller directly over the damper shaft. A minimum shaft length of 2.0 inch (51 mm) is required.
Note: Nailor EZvav controllers are designed to directly mount to 3/8 to 5/8 inch (9.5 to 16 mm) round or 3/8 to 7/16 inch (9.5 to
11 mm) square damper shafts.
Figure 2-2 Control and indicators
45
60
Position notch as shown
Stop position holes
Stop screw in storage
Rotate CW
ON CTS
1 2
COMM
READY
AI1
AI5
GND
AO4
AO3
SC
BO8
BO5
BO6
SC
BO7
24VAC
AI6
GND
AI7
T-
ST
AT
/
SENSOR
-A
+B
S
EO
L
BACnet MS/TP
Status LEDs
Mounting
tab
Mounting
bushing
Gear clutch button
Drive hub
and V-bolt
Mount the controller as follows:
1. Manually rotate the damper on the VAV box to the fully closed position.
2. On the controller, press the gear clutch button and rotate the drive hub in the same direction that closed the
damper. Turn the hub until it reaches a rotation limit, then rotate 2° in the opposite direction and release clutch.
3. Loosen the nuts on the V-bolt until the damper shaft can fit through the collar.
4. Place the controller over the damper shaft.
5. Finger tighten the nuts on the V-bolt to position the shaft in the drive hub
6. Center the mounting bushing in the mounting tab and fasten it with a #8 sheet metal screw.
7. Evenly tighten the V-bolt nuts on the drive hub to 30-35 in-lbs (3.34 – 3.95 N.m).
