Control Systems
International
®
MR-VAV-AX
Installation Sheet (TCON148 06/97) 1
Installation Sheet
Controller Installation
1.
Check the mounting location for the MR-AHU. The MR-
VAV-AX is typically mounted with the controller extending
down or to the right from the damper shaft. However, the
controller can be operated in any position.
Note:
Installing the controller to the right (with the
barbed fittings pointing down) will help to prevent
condensate from migrating into the on-board
velocity sensor.
With a downward extension, the available area around the
damper shaft must measure 6" (160 mm) down from the
lower edge of the shaft, 4.5" (120 mm) to the right, 1.5" (40
mm) to the left and 1.75"(45 mm) above the shaft. Ensure
the location allows enough clearance for servicing.
The actuator is designed to mount over a
1
⁄
2
" (12.7 mm)
diameter shaft with a minimum of 1" (25.4 mm) of exposed
shaft. If the damper shaft is less than
1
⁄
2
" an adapter is
required. The MR-VAV-AX will
not
work with larger shaft
diameters.
Note:
Optional adapters are available for
3
⁄
8
" (9.5 mm)
diameter damper shafts (CSI Part Number 603500-
0018).
2.
If the exposed damper shaft is less than 2" (51 mm) long,
move the two damper shaft mounting screws to the
alternate damper shaft positions (see Figure 1).
3.
Select the mounting bracket (see Figure 1) that will provide
the most stability for the operation of the actuator. Position
the mounting clip in the desired mounting bracket. Do
not
insert the clip more than half-way into the bracket. This will
allow the clip and the back of the actuator to properly align
with the VAV box.
4.
Rotate the VAV damper shaft by hand to the fully closed
position. Note whether the damper is rotated clockwise
(CW) or counter-clockwise (CCW) to close.
5.
Slip the controller over the damper shaft. Position the
actuator and, using a self tapping sheet metal screw, secure
the mounting clip to the VAV box. Next, press the actuator
toward the box until the actuator comes into contact with
the VAV box, or the mounting clip snaps into the bracket.
6.
Press and hold the red actuator clutch release (see Figure 1)
and rotate the actuator collar to the 5
°
index mark if the
damper shaft was rotated counter-clockwise to close (Step
4). Rotate the actuator collar to the 85
°
index mark if the
damper shaft was rotated clockwise to close (Step 4).
Figure 1. MR-AHU (Covered) Figure 2. MR-AHU (Cover Removed)
LAN -
LAN +
GROUND
POWER
DATA
GROUND
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. THE OPERATION
IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:
1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND
2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED INCLUDING
INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.
+12V
INPUT 4
INPUT 3
INPUT 2
INPUT 1
OUTPUT 2
OUTPUT 1
OUTPUT 3
24VAC
GROUND
12
11
10
9
8
7
6
5
4
3
2
1
24VAC 50/60 Hz CLASS 2
9VA + EXTERNAL LOAD
(40VA MAX)
MR-VAV-AX CONTROLLER
POWERED BY A SINGLE
CLASS 2 SOURCE
SERIAL NO:
24VAC, CLASS 2
36VA MAX
(12VA MAX EACH)
OUTPUT:
INPUT:
P1
P2
(LO)
(HI)
Alternate
Mounting
Bracket
Mounting Bracket
Cover Release
Actuator Clutch Release
Alternate Damper Shaft
Mounting Screw Position
Damper Shaft
Torx Mounting Screws
Damper
Shaft
Velocity
Sensor
Inputs
Cover Release
Cover Release
Mounting
Clip
U
L
®
LISTED
ENERGY MANAGEMENT EQUIPMENT
MAY BE USED IN PLENUM
APPLICATIONS
63M4
60572-0001
TB1 TB2
TB3TB4TB5
SWITCHES
FUNCTION
SELECT
ADDRESS
SELECT
P.O. BOX 59469: DALLAS, TX 75229
Thermistor/Discrete
Inputs
I/STAT Port
Sub-LAN Port
24VAC Power Input
Control Outputs
Address/Function
Select Dip Switches
Adjustable Stops
Damper Position
Indicator
Alternate Damper Shaft
Mounting Screw Position
Damper Shaft
Collar
Control Systems
®
International
HI
LO
2.9"
2.9"
P3
P4
EPROM
IN
OUT
GND
(-)LO
ROM
Memory
4A FB
Replaceable
Fuse
To Next Page
Need help?
General