Johnson Controls LP-FXVMA Series Installation Instructions Manual

FXVMA

Installation Instructions

LP-FXVMAxx-x

Part No. 24-10143-47, Rev. D

Issued April 16, 2009

Supersedes February 4, 2008

Applications

This document covers the mounting and wiring of the
FXVMA Variable Air Volume (VAV) Box Controller. For
more information about programming, configuring,
downloading, and/or commissioning the FXVMA, refer
to the FXVMA VAV Box Controller Technical Bulletin

(LIT-12011249).

The FXVMA is a VAV box controller in the Facility
Explorer line of products. The FXVMA is an integrated
assembly consisting of a high performance digital
controller, fast response actuator, and an accurate
Differential Pressure T ransducer (DPT), all of which are
pre-wired together and integrated inside a single
enclosure.

The FXVMA is fully programmable using FX Builder, or
you can select and configure a pre-defined VAV box
control application using FX Builder Express.

Various software and accessories are available to
assist you during the commissioning of the FXVMA and
the VAV box. This includes FX CommPro, which has
computer-based downloading and commissioning
capabilities; and the Medium User Interface, which has
an easy-to-use hardware interface.

The FXVMA includes an embedded communication
capability that enables the FXVMA to integrate into an
N2 or BACnet® Master-Slave/Token-Passing (MS/TP)
(depending on model) network of a building au tomation
system.

North American Emissions Compliance

United States

This equipment has been tested and found to
comply with the limits for a Class A digital device
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference when this equipment is
operated in a commercial environment. This
equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in
accordance with the instruction manual, may cause
harmful interference to radio communications.
Operation of this equipment in a residential area is
likely to cause harmful interference, in which case
the user will be required to correct the interference
at his/her own expense.

Canada

This Class (A) digital apparatus meets all the
requirements of the Canadian Interference-Causing
Equipment Regulations.

Cet appareil numérique de la Classe (A) respecte
toutes les exigences du Règlement sur le matériel
brouilleur du Canada.

Figure 1: FXVMA VAV Box Controller

FXVMA Installation Instructions 1

Installation

Observe these guidelines when installing the FXVMA:

• Transport the FXVMA in its original container to
minimize vibration and shock damage.

• Do not drop the FXVMA or subject it to physical
shock.

Accessories

Use Table 1 to order accessories.

Table 1: FXVMA Accessories Ordering

Information

Product
Code
Number

Y64T15-0 Transformer: 120/208/240 VAC Primary

Y65A13-0 Transformer: 120 VAC Primary to

Y65T42-0 Transformer: 120/208/240 VAC Primary

Y65T31-0 Transformer: 120/208/240 VAC Primary

AP-TBK1002-0 2-position screw terminal that plugs into

AP-TBK1003-0 3-position screw terminal that plugs into

Description

to 24 VAC Secondary, 92 VA, Foot
Mount, 30 in. Primary Leads and 30 in.
Secondary Leads, Class 2

24 VAC Secondary, 40 VA, Foot Mount,
8 in. Primary Leads and 30 in.
Secondary Leads, Class 2

to 24 VAC Secondary, 40 VA, Hub
Mount, 8 in. Primary Leads and
Secondary Screw Terminals, Class 2

to 24 VAC Secondary, 40 VA, Hub
Mount, 8 in. Primary Leads and
Secondary Screw Terminals, Class 2

spade lugs

spade lugs

2. Make sure the FXVMA base is parallel to the VAV
box (perpendicular to the damper shaft). If needed,
use a spacer to offset tipping of the FXVMA caused
by the shaft bushings.

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 electronics. Mou nt
the FXVMA vertically above the damper shaft to
allow any shaft condensation to fall away from the
FXVMA. Additional measures may be required in
some installations.

3. Secure the self-piercing No.10 screw through the
FXVMA mounting slot with a power screwdriver
and 100 mm (4 in.) extension socket; otherwise,
use a punch to mark the position of the shoulder
washer and then drill a hole into the V AV box using
a 3.5 mm (9/64 in.) drill bit.

4. Insert and tighten the mounting screw against the
washer.

IMPORTANT: Do not overtighten the screws, or the
threads may strip. If you plan to mount to the VAV
box, make sure the screws do not interfere with
damper blade movement.

5. Locate the damper position using the typical
marking on the end of the damper shaft (Figure 2).

FIG:d_shaft

Figure 2: Typical Damper End Shaft Icons

Mounting

To mount the FXVMA:

1. Place the FXVMA in the proper mounting positi on
on the damper shaft so that the wiring conn ectio ns
are easily accessible.

FXVMA Installation Instructions2

6. Note the direction, Clockwise (CW) or
Counterclockwise (CCW), required to close the
damper.

7. Grasp the damper shaft firmly with pliers and either
manually close the damper for 90° boxes or
manually open for 45° or 60° boxes.

8. Push down and hold the Manual Override button,
and turn the FXVMA coupler until it contacts the
mechanical end-stop at either the fully closed (90°
boxes) or fully open (45° and 60° boxes) position.

9. For 90° boxes, rotate the coupler in the direction
that the damper closes with the mechanical limit.
The open end-stop is automatically set for 90°
boxes.

Y o u must provide har d stops for 4 5° and 60° boxe s
at both fully closed and fully open damper
positions. By installing the FXVMA at the fully open
position, the FXVMA provides the open stop for the
box. The closed damper seal provides the fully
closed stop.

10. Tighten the square coupler bolt to 17 to 21 N·m
(150 to 185 lb·in.).

11. Loop the pneumatic tubing to include a trap for
condensation. Attach the tubing from t he FXVMA to
the VAV box flow pickup. The red tubing is
connected to the inlet or high pressure side and the
clear tubing is connected to the low pressure side.

12. Push the Manual Override button, and turn the
actuator coupling manually to ensure that the
actuator can rotate from full closed to full open
positions without binding.

13. Complete the mounting by rotating the damper to
the full open position.

CAUTION: Risk of Property Damage.

Rotate the damper to the fully open

!

position before starting the air handler.
Failure to rotate the damper to the full
open position may result in damage to
the Variable Air Volume box or ductwork
when the air handler is started.

Wiring

To wire the FXVMA:

1. Wire the analog and binary Inputs/Ou tputs (I/Os) to
the FXVMA.

2. Wire the Network Room Module (NRM) to the
FXVMA.

3. Daisy-chain the N2 or BACnet MS/TP bus to the
FXVMA’s Supervisory Link.

4. Connect power wiring to the FXVMA.
The channel assignments for the inputs and outputs

vary according to the control application configuration.
Obtain the actual I/O channel assignments from
FX Builder Express or FX Builder.

The wiring connections for the inputs and outputs vary
depending on the FXVMA application.

Universal Input Wiring Details

The FXVMA features one Universal Input (UI) that you
can configure to accept either a passive sensor, an
active sensor, or a main tained dry contact switch inpu t.

Table 2: FXVMA Universal Input Description

Terminal
Label

+15 V Sources 15 VDC power for active

IN 0-10 V Analog Input for active sensors

ICOM Signal common for IN terminal (isolated

Passive Sensor Connection

The UI accepts a 0-600k ohm input signal from a
passive (resistive type) sensor. The UI has an internal
12 V, 15k ohm pullup. See Figure 3.

RTD TEMPERATURE

Figure 3: Passive Sensor Connection

Function and Electrical Ratings/
Specifications

devices
35 mA total current

Internal 75k ohm pulldown
or
0-600k ohm Analog Input for passive

sensor (resistive temperature sensor)
Internal 12 V, 15k ohm pullup
or
Dry contact Binary Input
Internal 12 V, 15k ohm pullup

from all other terminal commons)

FXVMA

+15
IN
ICOM

ELEMENT

UNIVERSAL

FIG: PassiveSensor

FXVMA Installation Instructions 3

Active Sensor Connection

3

The UI accepts a 0-10 VDC input signal from an active
sensor. The UI has an internal 75k ohm pulldown. The
active sensor can be powered externally; alternatively,
the FXVMA provides 15 VDC, 35 mA power to power
the sensor locally. See Figure 4 and Figure 5.

~

ACTIVE

SENSOR

+
~

-

V

mA

O

H

DEDICATED
24V SUPPLY

N

FXVMA

+15
IN
ICOM

UNIVERSAL

Figure 4: Active Sensor Connection

(Powered Externally)

ACTIVE

SENSOR

Power

Output

Ground

(Common)

FXVMA

UNIVERSAL
+15
IN
ICOM

FIG: ActiveSensorVMA

Figure 5: Active Sensor Connection (Powered

by the FXVMA)

Dry Contact Switch Connection

The UI accepts a dry contact switch input with a 1 s
minimum pulse width (0.5 Hz at 50% duty cycle). The
UI has an internal 12 V, 15k ohm pullup.

FXVMA

MAINTAINED SWITCH

DRY CONTACT

(N.O. or N.C. as required)

+15
IN
ICOM

UNIVERSAL

FIG: dry contact

Figure 6: Dry Contact Maintained Switch

Connection

Binary Output Wiring Details

The FXVMA features three field-connectable binary
outputs. These binary outputs are 24 VAC, 0.5 A triacs
that you can configure to control on/off devices (such
as fans, 2-position valves, and heating elements) or
incremental actuators.

Use Figure 7, Figure 8, and Figure 9 to make the
appropriate wiring connections to the Binary Outputs.
Refer to the configured FXVMA application
documentation for actual Binary Outputs used.

Table 3: FXVMA Binary Output Description

Terminal
Label

OUTX Sources 24~ Power (hot)
OCOMX Binary Output (24 VAC triac)

Function and Electrical Ratings/
Specifications

• When the binary output is activated,
OCOMX is connected to 24~ Power
(com).

• 30 VAC maximum output voltage

• 0.5 A maximum output current

• 40 mA minimum load current

BINARY

FXVMA

OUT1

OCOM1

OUT2

OCOM2

OUT3

OCOM3

ON/OFF

+

-

FIG:bin_out

Figure 7: Binary Output Connection to a

Single On/Off Device

ON/OFF

FXVMA

OUT1

OCOM1

BINARY

OUT2

OCOM2

OUT3

OCOM3

BINARY OUTX ARE 24 VAC (HOT)

OCOMX are internally switched to 24 VAC common.

STAGE 1

+

-

DEVICES

STAGE 2

+

-

STAGE

+

-

Figure 8: Binary Output Connection to Multiple

On/Off Devices

INCREMENTAL

VALVE

HTG-O

COM
CCW

CW

ACTUATOR

TERMINATIONS FOR

CONFIGURATION

3WAYCOIL-A

VALVE

HTG-O

COM
CCW

CW

BINARY

FXVMA

OUTX

OCOMX

OUTX

OCOMX

TERMINATIONS FOR

2 WAY / 3 WAY COIL-B

CONFIGURATIONS

FIG: BinaryOutputIncremental

Figure 9: Binary Output Connection to an

Incremental Actuator

FXVMA Installation Instructions4

Configurable Output Wiring Details

The FXVMA features two field-connectable outputs that
you can configure to control on/off devices (such as
fans, 2-position valves, or heating elements),
incremental actuators (such as incremental valves), or
0-10 VDC proportional actuators (such as proportional
valves).

Table 4: FXVMA Configurable Output Description

Terminal
Label

OUTX Analog Output

OCOMX Analog Output common

Function and Electrical Ratings/
Specifications

• Sources 0-10 VDC

• External 1k ohm minimum load
required

• 10 mA maximum output current

or
Binary Output (24 VAC triac)

• When the binary output is activated,
OUTX is connected to OCOMX

• 30 VAC maximum output voltage

• 0.5 A maximum output current

• 40 mA minimum load current

• Provides the signal common for
Configurable Output terminals when
the CO is configured for analog
output operation.

• Isolated from all other terminal
commons.

or
Binary Output common

• Provides the signal common for
Configurable Output terminals when
the CO is configured for Binary
Output operation.

• Isolated from all other terminal
commons including CO terminal
commons.

On/Off Device Connection

The configurable outputs are connected to on/off
devices as shown in Figure 10. The FXVMA provides
24 VAC, 0.5 A triacs to op erate on/off devices.

FXVMA

CONFIGURABLE

OUT4

OCOM4

OUT5

OCOM5

HOT

24~

COM

GROUND

480/277/240/
208/120/24/
24VAC

ON/OFF
DEVICE

+

-

FIG: Configurab;eOutputOnOff

Figure 10: Configurable Output Connection to

an On/Off Device

Incremental Actuator Connection

The configurable outputs are connected to increment al
outputs as shown in Figure 11. The FXVMA provides
24 VAC, 0.5 A triacs to operate incremental actuators.

FXVMA

CONFIGURABLE

OUT4

OCOM4

OUT5

OCOM5

HOT

24~

COM

INCREMENTAL

ACTUATOR

CCW

CW

COM

GROUND

480/277/240/
208/120/24/
24VAC

FIG: ConfigurableOutputIncremental

Figure 1 1: Configurable Output Connec tion to

an Incremental Actuator

Proportional Actuator Connection

The configurable outputs are connected to proportional
(0-10 VDC) outputs as shown in Figure 12. The output
load minimum resistance must be 1k ohm.

FXVMA

CONFIGURABLE

OUT4

OCOM4

OUT5

OCOM5

HOT

24~

COM

PROPORTIONAL

ACTUATOR

IN
24 V
COM

GROUND

480/277/240/
208/120/24/
24VAC

FIG: ConfigurableOutputProportional

Figure 12: Configurable Output Connection to

a Proportional Actuator

FXVMA Installation Instructions 5

Network Room Module (NRM) Wiring Details

The NRM connects to the Remote Display Bus of the
FXVMA at the 4-terminal connection marked SENSOR.
You can connect the NRM up to 30.5 m (100 ft) from
the FXVMA.

Use Figure 13 to make the wiring connections between
the FXVMA and the NRM.

NETWORK ROOM

MODULE

RT+ RT- COM

PWR

FXVMA

PWR
COM

LL ­LL +

SENSOR

FIG: nrmconnection

Use Figure 14 to make the BACnet MS/TP bus
connections to the FXVMA.

FROM LAST N2 OR

BACNET DEVICE

TO NEXT N2 OR

BACNET DEVICE

FXVMA

SHLD
COM

SUPERVISORY LINK

RT ­RT +

Figure 14: N2 or BACnet MS/TP Bus Wiring

BACnet MS/TP devices, including the FXVMA, are
networked together in a daisy-chain configuration. For
runs up to 1,220 m (4,000 ft), we recommend you use
stranded 22 AWG, twisted 3-conductor wire. Avoid
using solid wire when possible as it is prone to break
when pulled.

Figure 13: NRM Connection

Supervisory Link Wiring Details

N2 Bus Wiring Details

The N2 bus is a communications network consisting of
three wires carrying RT+, RT-, and REF signals. For
more information on the N2 bus, refer to the N2
Communication Bus Technical Bulletin (LIT-636018).

N2 devices, including the FXVMA, are networked
together in a daisy-chain configuration. For runs up to
1,520 m (5,000 ft), we recommend you use stranded
22 AWG, twisted 3-conductor wire. Avoid using solid
wire when possible, as it is prone to break when pulled.
The N2 bus may be extended to a maximum length of
4,568 m (15,000 ft) using two repeaters.

Use Figure 14 to make the N2 bus connections to the
FXVMA.

BACnet MS/TP Bus Wiring Details

The BACnet MS/TP bus is a communications network
consisting of three wires carrying RT+, RT-, and REF
signals. For more information on the rules of the MS/TP
Communications Bus, refer to the MS/TP

Communications Bus Technical Bulletin
(LIT-1201 1034).

Power Wiring Details

The FXVMA requires 24 VAC power. Use Figure 15 to
make power wiring connections.

WHERE 2 OR MORE DEVICES

FXVMA

HOT

24~

COM

SHARE A SINGLE

TRANSFORMER, MAINTAIN

POLARITY (COM TO COM)

BETWEEN DEVICES

GROUND

480/277/240/
208/120/24/
24VAC

FIG: wiringconnections

Figure 15: Power Wiring Connections

Setup and Adjustments

Setting the N2 Address

The N2 address switch sets a unique address for the
FXVMA on the N2 bus.

Set the N2 address using the DIP switches on the face
of the FXVMA. The address equals the sum of the
numbers set to ON. For example, if the first (1), the
third (4), and the fifth (16) DIP switches are set to ON,
the device address is 21 (1 + 4 + 16 = 21). Use
addresses 3-255. See Figure 16.

1

2

4

8

6

1

2

3

4

6

8

2

N

O

Figure 16: Setting the DIP Switches to Address 21

1

FIG:FXVMA Address

FXVMA Installation Instructions6

Setting the BACnet MS/TP MAC Address

The BACnet MS/TP MAC address switch sets a unique
address for the FXVMA on the BACnet MS/TP bus.

Set the BACnet MS/TP MAC address using the DIP
switches on the face of the FXVMA. The address
equals the sum of the numbers set to ON. For
example, if the first (1), the third (4), and the fifth (16)
DIP switches are set to ON, the device address is 21
(1 + 4 + 16 = 21). Use addresses 1-128. See Figure 16.

Setting the End-of-Line (EOL) Switch

Move the End-of-Line (EOL) termination switch to its
On position when the FXVMA is at the end of the
daisy-chain of devices on the N2 or BACnet MS/TP
bus; otherwise, leave it at its default Off position. See
Figure 17.

O

1

N

ON Position

Figure 17: EOL Switch

O

1

N

OFF Position

r

d

c

.

h

c

t

i
w
S

_

L
O
E

T roubleshooting

Use Table 5 to troubleshoot the FXVMA.

Table 5: FXVMA Light-Emitting Diode (LED)

Codes

LED Description

Power Green

On when powered
Off when not powered

Fault Red

On during a reset
Off when the application is loaded and

operating correctly
Flashing when application is not

operating correctly or when the
application is in test mode

R/T
(Supervisory)

Green
Flashes when FXVMA transmits data to

a supervisor .
Turns off when the FXVMA receives

data.

Repair Information

If the FXVMA Variable Air Volume Box Controller fails
to operate within its specifications, refer to the FXVMA
VAV Box Controller Technical Bulletin (LIT-12011249)
for a list of repair parts available.

FXVMA Installation Instructions 7

Technical Specifications

FXVMA

Product Code Number LP-FXVMA##-#
Supply Voltage 20-30 VAC at 50 or 60 Hz (24 VAC Nominal), Class 2
Power Consumption 10 VA typical, 14 VA maximum

Power delivered to devices connected to the binary outputs (valves, relays, and similar
devices) is not included in this rating.

Ambient Operating Conditions 0 to 50°C (32 to 122°F )
Ambient Storage Conditions -40 to 70°C (-40 to 158°F)
Terminations 6.3 mm (1/4 in.) spade lugs-except communications and 24 VAC power , which are screw

terminals

Controller Addressing 3-255 for N2

1-128 for BACnet MS/TP

Communications Bus N2. For more information, refer to the N2 Communications Bus Technical Bulletin

Mounting Mounts to V AV box damper shaft using single set screw and to duct with single mounting

Actuator Rating 4 N·m (35 lb·in) minimum; Minimum shaft length = 44 mm (1 3/4 in.)
Dimensions Width: 182 mm (7.2 in.)

Weight 0.86 kg (1.9 lb)
Compliance United States

(LIT-636018).
BACnet MS/TP. For more information, refer to the MS/TP Communication Bus Technical

Bulletin (LIT-12011034).

screw.

Length: 182 mm (7.2 in.)
Height: 64 mm (2.5 in.)
Center of Output Hub to Center of Anti Rotation Slot: 160 mm (6.3 in.)

– UL Listed, File E107041, CCN PAZX, UL 916 Energy

Management Equipment

Canada

– UL Listed, File E107041, CCN PAZX7, CAN/CSA C22.2

No. 205 Signal Equipment

– Industry Canada Compliant, ICES-003

Europe

– CE Mark, EMC Directive 89/336/EEC, in accordance

with EN 61000-6-3 (2001) Generic Emission Standard
for Residential and Light Industry and EN 61000-6-2
(2001) Generic Immunity Standard for Heavy Industrial
Environment, and the Low Voltage Directive 73/23/EEC
in accordance with EN 60730-1 (1999) Automatic
electrical controls for household and similar use.

BACnet International

– Bacnet Testing Laboratories™

(BTL) 135-2004 Listed

BACnet Application Specific Controller (Pending)

The performance specifications are nominal and conform to acceptable industry standard. For application at conditions beyond these
specifications, consult the local Johnson Controls® office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication
or misuse of its products.

Building Efficiency

507 E. Michigan Street, Milwaukee, WI 53202

Johnson Controls® is a registered trademark of Johnson Controls, Inc.

All other marks herein are the marks of their respective owners. © 2009 Johnson Controls, Inc.

FXVMA Installation Instructions8

Published in U.S.A. www.johnsoncontrols.com