Schneider Electric MNB-V1, MNB-V2 Installation Instructions

MNB-V1

Figure-1 MNB-Vx Mounting Dimensions.

MNB-V2

MicroNet BACnet

VAV Controllers

Installation Instructions

Application

The TAC I/A Series® MicroNet™ BACnet™ VAV (Variable Air Volume) Controllers are interoperable controllers with native BACnet MS/TP communications support. All models incorporate: an integral actuator with manual override; an integral, patented, pressure transducer; three

SW24H1

SW24H2

SW24H3

24H

24G

GND

STATUS

MSTP RCV MSTP XM

S-LK/COM

COM

S-LK LON LON

universal inputs; Sensor Link (S-Link) support; LED status indication; and over-the-shaft damper mounting. See the model chart, below, for optional features.

Model Chart

Model

Number MNB-V1 300

MNB-V2 313

Inputs and Outputs

UI UO DO (Triacs)

Installation

Inspection

Inspect carton for damage. If damaged, notify carrier immediately. Inspect controllers for damage upon receipt.

Requirements

• Installer must be a qualified technician

The following items are not provided.

• Job wiring dia grams

• Tools:

– 1/8 inch allen wrench – Screw drivers – 1/4 inch hex driver for travel adjustment screws – Pliers for turning damper shafts – Digital Volt-ohm meter (DVM) – Drill and bits for mounting screw – Static protection wrist strap – Torque wrench (capable of measuring at least

70 lb-in (8 N-m))

• MNA-FLO-1 enclosure for connecting to conduit (optional)

• AM-135, 3/8 in. (9.5 mm) to 1/2 in. (12.8 mm) shaft

adapter (optional)

• MS/TP trunk end-of-line termination resistor kit,

120  ±5%, part number 40-1758.

• Spacer or shim for anti-rotation bracket (if needed)

• One #10 sheet metal screw for anti-rotation bracket

• Class 2 power transformer supplying a nominal 24 Vac,

sized appropriately for the controller (15 VA) plus the anticipated Digital Output (DO) loads. In European Community, transformer must conform to EN 60742

• 0.170 in. (4.3 mm) I.D. FRPE polyethylene tubing or

0.125 in. (3.2 mm) I.D. Tygon

tubing for piping

connections. Not more than 5 ft (1.52 m) long.

Precautions

When installing the MNB-Vx controller, be sure to follow the guidelines outlined in "Precautions" on page 4.

Location

The MNB-Vx controllers are suitable for indoor use only.

Caution:

• Avoid locations where excessive moisture, corrosive

fumes, vibration, or explosive vapors are present.

• Avoid electrical noise interference. Do not install near

large contactors, electrical machinery, or welding equipment.

• Locate where ambient temperatures do not exceed

131°F (55°C) or fall below 32°F (0°C) and relative humidity does not exceed 85% or fall below 5%, non-condensing.

Mounting location must clear the maximum dimensions of the controller case and allow the controller to be mounted flush to

the surface of the terminal box and perpendicular to the damper shaft.

Dimensions

Mounting dimensions are shown in Figure-1.

6-1/4 (159)

4-1/2 (114)

1-3/4

(44)

5-3/4 (146)

2-1/2 (63)

7-3/4 (197)

Dimensions shown are in inches (mm).

Mounting Mount the controller to the damper according to the instructions in Figure-2.

SW24H1

SW24H2

SW24H3

24H

24G

GND

STATUS

STP RCV

PXMT

UO1

COM

UI1

COM

UI2

UI3

S-LK/C

S-LK

MSTP +

MSTP -

SHLD

Figure-2 MNB-Vx Damper Mounting.

Warning: Electrical shock hazard! Disconnect power before installing or removing the cover.

1 Slide the controller onto the damper

shaft and mount the controller as shown, making sure it is on a plane that is perpendicular to the damper shaft. See notes through .

1 4

3 Press the manual override button and turn the

output shaft to the full CCW position. If necessary, rotate the output shaft slightly to return the button to the fully extended position.

For CW (closed) position, turn the output shaft fully CW.

2 Turn the damper shaft to the

full CCW (closed) position.

For CW (closed) position,

4 Finish mounting the controller to

the damper as shown, referring to notes and .

turn the damper shaft fully CW.

1 Check that the position selected for the mounting

hole does not interfere with the operation of the damper.

2 Some terminal boxes have sheet metal screw

heads or other protrusions near the damper shaft. In these cases, add a spacer or shim (not provided) under the controller's anti-rotation bracket to make the controller perpendicular to the shaft.

3 The anti-rotation bracket is pre-installed in the

controller slot when shipped.

4 Caution: Use the anti-rotation bracket when direct-

mounting the controller onto a damper shaft. Do not rigidly mount the controller to the damper. Position the anti-rotation bracket so that the controller can float, to ensure that the controller's output shaft can turn freely through its full stroke, without binding.

If necessary, loosen and slide the CW travel adjustment screw to the desired position, and then tighten the screw. For CW (closed) position, reposition the CCW travel adjustment screw.

6 If preloading the damper for closed position is

required, set the controller as follows:

a. Rotate the controller CW approximately 3/16"

(4 mm) off the centerline of the damper (see view below) and then tighten the output shaft set screws 60 - 70 lb-in. (6.8 - 7.9 N-m), using an 1/8" allen wrench.

For CW (closed) position

, rotate the controller

CCW (see view below).

b. Rotate the controller back into alignment with

the centerline of the damper. This should ensure closure of the damper.

CCW Closed

CW Closed

5 6

MSTP XM

MSTP RCV

STATUS

GND

24G

SHLD

MSTP -

S-LK/COM

S-LK

Output

Shaft

CW Travel

Adjustment Screw

24H

SW24H3

SW24H2

SW24H1

UI3

COM

UI2

UI1

COM

UO1

Travel

Indicator

#8 (4 mm) Sheet

Metal Screw

(not provided)

Short Shaft

Set Screw

Locations

Manual Override

Slot

Damper

Shaft

Set Screws (2) 60 - 70 lb-in. (6.8 - 7.9 N-m).

CCW Travel

Adjustment Screw

Button

Anti-rotation

Bracket

432

5 When finished, verify free movement of the damper as follows:

Press and hold the manual override button.

b. Verify that the damper can be freely positioned between full open and full

closed. There must be no binding between the controller and damper, and

3 3

3/16" (4 mm)

(approx.)

3/16" (4 mm)

(approx.)

the damper must be free of obstructions that may hinder its operation.

c. Release the manual override button. If the button does not fully extend, it

will do so automatically once power is applied to the controller. The button may also be made to fully extend by rotating the output shaft slightly.

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