Johnson Controls LN Series, LN-VAVCF-12 Installation Instructions Manual

LN Series Variable Air Volume (VAV) LN-VAVCF-12
Controller

Installation Instructions

LN-VAVCF-12

Application

The LN Series Variable Air Volume (VAV)
LN-VAVCF-12 controller is designed to control various
types of variable air volume equipment.

The controller is based on L
peer-to-peer communication between controllers and is

ONMARK® network certified.

L
Note: Y ou can configure th e LN-V AVCF-12 controllers

using the LN Series Variable Air Volume Preloaded
Application. For more information regarding
configuration using the preloaded application, refer to
the LN Series Variable Air Volume (VAV) Preloaded
Application User’s Guide (LIT-12011830).

North American Emissions Compliance

United States

ONWORKS® technology for

Code No. LIT-12011802

Issued April 24, 2014

Supersedes January 30, 2013

Installation

For proper installation and subsequent opera tion of the
LN-VAVCF-12 controller, follow these
recommendations:

• Inspect the controller for shipping damage. Do no
inst

all damaged devices.

• Allow for proper clearance of device casing, wirin
ter

minals, and service pin for easy acce
rdware configuration, and maintena

ha

•

The controllers are designed to operate under the
following conditions:

• Ambient temperature between 32 to 122°F

(0 to 50°C)

• Relative humidity from 0 to 90

ncondensing

no

ss,

nce.

%,

g

t

Complianc

This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:

1. This device may not cause harmful interference
an

2. This device must accept any interference
received, including interference that may caus
un

Warning (Part 15.21)

Changes or modifications not expressly approved by
the party responsible for compliance could void the
user’s authority to operate the equipment.

e Statement (Part 15.19)

d

desired operation.

Canada

Industry Canada Statement

The term IC before the certification/registration
number only signifies that the Industry Canada
technical specifications were met.

Le terme « IC » précédant le numéro d'accréditation/
inscription signifie simplement que le produit est
conforme aux spécifications techniques d'Industry
Canada.

• Ensure proper ventilation of devices and
eas where corroding, deteriorating, or expl

ar

rs, fumes, or gasses may be present.

vapo

• Record the Neuron® ID located on the box and on

,

e

the side of the controller. You need it fo
commissioning the device.

IMPORTANT: Work in a static-free area. Discharge
any static electricity you may have accumulated.
Discharge static electricity by touching a known,
securely grounded object. Do not handle the
controller without proper protection against static
discharge. Use a wrist strap when handling the
controller. Secure the wrist strap clamp to earth
ground.

avoid

osive

r

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 1

Dimensions

Fig: ln_vavcf_12_dim ensions

Figure 1: LN-VAVCF-12 Dimensions, mm (in.)

Figure 2: LN-VAVCF-12 Components

Fig: ln_vavcf_12_components

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions2

Mounting

Figure 3: Mounting a LN-VAVCF-12 on a Damper

Shaft

Figure 4: Damper Shaft Markings

This mounting procedure pertains to the LN-VAV CF-12
controller with built-in actuators. Units with a damper
actuator only have one screw.

The controller is specially designed for mounting onto
an air duct or within a panel using the integrated
mounting collar and the provided screw. This mounting
arrangement opposes the torque applied to the damper
shaft.

3. Locate the damper position by the marking

typically found on the end of the damper shaft
(Figure 4).

1. Place the controller into position on the damp e r
shaft so wiring connections are easily accessible.

Note: The controller must fit onto the damper
shaft so the base of the controller is parallel to the
VAV box and perpendicular to the damper shaft. If
the damper shaft has an external bushing that
prevents the controller from being mounted flush to
the side of the VAV box, use a spacer of the same
thickness to compensate and to ensure the
controller is at a right-angle to the shaft to prevent
binding.

IMPORTANT: Protect the controller from dripping
water, condensation, and other moisture. Water or
moisture could result in an electrical short, which
may damage or affect the operation of th e co ntro ller.

2. Using a power screwdriver , attach the controller to
the VAV box with the provided screw through the
controller’s mounting bracket. You may also mark
the screw position on the VAV box, drill a hole, then
attach the controller to the VAV box.

IMPORTANT: Do not overtighten the screws.
Overtightening may strip the threads and will void
the warranty.

4. Determine the direction required to close the
damper Clockwise (CW) or Counterclockwise
(CCW). Turn the damper shaft with a pair of pliers
to fully close the damper for 90° VAV boxes or fully
open the damper for 45° or 60° VAV boxes.

5. Press and hold down the Actuator Clutch for
Manual Adjustment button and turn the controller’s
shaft coupler until it touches the mechanical
end-stop to either the fully closed position (90° VAV
boxes) or the fully open position (45° or 60° VAV
boxes). See Figure 2.

6. Position mechanical stops:
a. For 90° VAV boxes: if the d amper closes CCW,

turn the coupler to the CCW mechanical stop
limit. If the damper closes CW, tur n the coupler
to the CW mechanical stop limit. The open
mechanical stop is factory preset for
90° VAV boxes.

b. For 45° or 60° VAV boxes: the mechanical

stops must be set for both the fully closed and
fully open damper positions. By installing the
controller at the fully open position, the
controller provides the open mechanical stop
for 45° and 60° VAV boxes. The closed
damper seal provides the fully closed stop.

7. Tighten the U-Bolt clamp on to the damper shaft
using an 8 mm (5/16 in.) wrench or socket. Tighten
the bolts between 11 and 15 N·m (100 and
130 lb·in).

8. Test for free damper shaft movement: Press and
hold down the Actuator Clutch for Manual
Adjustment button and manually turn the actuator
coupling to ensure the actuator can rotate from
fully closed to fully opened positions without
binding.

9. Connect the VAV box flow sensor tubing to the
controller’s Pressure Sensor Inputs. Create a
condensation trap in the pneumatic tubing by
forming it into a vertical loop.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 3

10. Finalize the installation by rotating the damper to

!

Figure 5: T ypical Power and Net work Connections with an LN Series Communicating Sensor Input a nd

Floating Actuator Output

the full open position.

CAUTION: Risk of Property Damage.

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

MISE EN GARDE : Risque de dégâts
matériels.

Faire pivoter le registre pour le placer en
position d'ouverture complète avant de
démarrer l'unité de traitement d'air. Le
non-respect de cette directive risque
d'endommager le caisson de l'unité à
volume d'air variable (VAV) ou le réseau
de conduites au démarrage de l'unité de
traitement d'air.

Typical VAV Application Wiring Diagram

Figure 5 shows the typical power and network
connections with a floating actuator output and sensor.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions4

Wiring

!

Figure 6: LN-VAVCF-12 Jumper Locations

Digital Outputs (DO)

Power Source

Net to Subnet Port

Settings

*

Factory-default positions

Subnet

Port

Wireless

Port

Jumpers for

DO1 & DO2

Jumpers for

DO3 & DO4

Triac Internal

Power*

Triac External

Powered

Typical locations: Quantity may vary according to controller model

Disabled*Enabled

IMPORTANT: Make all wiring connections in
accordance with the National Electrical Code and all
local regulations. Use copper conductors only. Do
not exceed the control’s electrical rating.

CAUTION: Risk of Electric Shock.

Disconnect the power supply before
making electrical connections to avoid
electric shock.

MISE EN GARDE : Risque de décharge
électrique.

Débrancher l'alimentation avant de
réaliser tout raccordement électrique afin
d'éviter tout risque de décharge
électrique.

Recommendations:

• Use the removable terminal connectors to make all
wiring connections.

• Disconnect the terminal connectors from the
device for wiring.

Configuration Jumper Location and Identification

See Figure 6 for the controller’s on-site configurable
jumpers.

• Use a small flat screwdriver to tighten the terminal
connector screws once you have inserted the
wires.

• Keep analog type cables (for power, voltage,
current inputs, or TRIAC outputs) apart from other
types of wiring to avoid any ambient noise
transmission among wires; however, unswitched
power wiring can be in the same conduit as the
L

ONWORKS communication cable.

• The board connectors accept wires or flat cables
ranging from 22 to 14 AWG (0.645 to 1.630 mm
diameter) per pole; however, power cables must
remain between 18 and 14 A WG (1 .0 24 a nd 1.6 30
mm diameter).

• The transformer powering the controller must be
configured as a floating transformer. Do not ground
the transformer.

• Keep all wires away from high-speed data
transmission cables (for example, Ethernet).

IMPORTANT: Do not connect the analog/digital
inputs or common terminals to ground (only if
otherwise stated).

• Keep input and output wiring in conduits, trays, or
close to the building frame, if possible.

For more information on wiring and powering a VAV
controller that uses a L
communications, refer to the L

ONWORKS network for

ONWORKS LN-Series

Network Communication and Interface Guide
Technical Bulletin (LIT-12011253).

Power Wiring

Device power requirements: 24 VAC +15%, Class 2
Note: To conform to Class 2 requirements in the

United State s, use tran sformers of 100 VA at 24 VDC
or less to power the controller.

For power and ground wiring, use the heaviest gauge
wire based on a maximum of 14 AWG and a minimum
of 18 AWG.

We recommend wiring only one controller per 24 VAC
transformer.

If only one 24 VAC transformer is available, determine
the maximum number of VAVs that can be supplied on
a single power cable supplied by a 100 VA transformer,
according to the cable’s wire gauge and the total cable
length from Table 1.

Avoid installation conditions that fall outside the
parameters of Table 1.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 5

Figure 7: Power Wiring – AC

Figure 8: Power Wiring – DC

Ta b le 1: Maximum Number of VAV Devices on a Power Run

AWG Power Run

Total Cable
Length

4

14
14 60 m (200 feet) 5 3 2
14 45 m (150 feet) 5 4 3
14 30 m (100 feet) 5 5 4
16 60 m (200 feet) 3 2 1
16 45 m (150 feet) 5 3 2
16 30 m (100 feet) 5 4 3
18 45 m (150 feet) 3 2 1
18 30 m (100 feet) 5 3 2

1. Typical VAV controller with one LN Series Communicating Sensor and actuator active. No external loads.

2. Typical VAV controller with one LN Series Communicating Sensor, 2 TRIAC loads (1.6 VA each), 1 analog output (20 mA),
and actuator active.

3. Typical VAV controller with one LN Series Communicating Sensor, 4 TRIAC loads (1.6 VA each), 2 analog outputs (20 mA
each), and actuator active.

4. Device terminals are not capable of accepting two 14 AWG wires (when daisy-chaining devices). Use a wire nut with a pig
tail to make such a connection.

75 m (250 feet) 4 2 1

Maximum Number of
Devices at 7 VA per

Device

1

Maximum Number of
Devices at 10 VA per

Device

2

Maximum Number of
Devices at 15 VA per

Device

3

Use an external fuse on the 24 VAC side (secondary
side) of the transformer to protect all devices against
power line spikes (Figure 7).

IMPORTANT: Maintain consistent polarity when
connecting controllers and devices to the
transformer. Connect the COM of each controller
and each peripheral to the same terminal on the
secondary side of the transformer.

IMPORTANT: The COM terminals of the controller
are internally wired to the 24V COM terminal of the
power supply. Connecting a peripheral or another
controller to the same transformer without
maintaining polarity between these devices will
cause a short circuit. The transformer must be
floating (it should not be grounded).

Input Wiring

The controller has physical connections for six inputs,
which are software configurable from within the
device’s Graphical Programming Interface (GPI) LN
plug-in, the LN plug-in when using LN Builder, or the
LN wizard when using the BSC Workbench. Each input
can be configured for digital, resistive, current, or
voltage signals. You must configure the input types
properly in the software plug-in or wizard to ensure
proper input readings.

IMPORTANT: Before connecting any input
equipment to the controller, refer to the
manufacturer’s installation guide.

Note: For wire length less than 75 feet (23 m), use
either a shielded or unshielded 18 AWG wire.

Note: For a wire up to 200 feet (61 m) long, a shielded
18 AWG wire is recommended.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions6

Wiring Digital Inputs

Figure 9: Digital Dry Cont act (NO and

NC)

Figure 10: Resistive Input – RTD/Thermistor

Input

Figure 11: Resistive Input – 10k Ohm

Potentiometer Input

Figure 12: Current Input – 2-Wire

Transduce r Powered by the Con troller

Figure 13: Current Input – 3-Wire

Transducer, Externally Powered

Figure 14: Current Input – Transducer with

Its Own Power Source

Figure 15: Voltage Input – 3-Wire Transducer

Figure 16: V oltage Input – Transducer with Its

Own Power Source

Use this configuration to monitor digital dry contracts,
as well as pulsed contacts (Figure 9).

Resistive 10k ohm Inputs

Use this input configuration to monitor 100k ohm RTDs,
10k ohm Type 2 and Type 3 thermistors, and
potentiometers (Figure 10 and Figure 11).

For a 3-wire, 0 to 20 mA transducer powered by an
external 24 AC/DC power supply, connect the current
input as shown in Figure 13.

If the transducer is powered by its own power source,
connect the current input as shown in Figure 14.

Wiring Voltage Inputs

Voltage inputs have a range of 0 to 10 VDC or 0 to 5
VDC.

Note: When you use a 100k ohm input, the wire
length should be short to avoid a possible temperature
offset; for example, 18 AWG wire, 25 feet (7.6 m) in
length creates an offset of 2°F (1.1°C).

Wiring Current Inputs

Current inputs can have a range of 4 to 20 mA.
Depending on the transducer power requ irements, you
can use any one of the following input configurations.

If you are using a 2-wire, 4 to 20 mA transducer
powered by the controller’s internal 15 VDC power
supply, connect the current input as shown in the
Figure 12.

If you are using a 3-wire, 0 to 10 V or 0 to 5 V
transducer, connect the voltage input as shown in
Figure 15 if you are using a 3-wire, 0 to 10 V or 0 to 5 V
transducer.

If the transducer is powered by its own power source,
connect the voltage input as shown in Figure 16.

LN Series Communicating Sensor Wiring

The LN Series Communicating Sensors are room
temperature sensors with backlit display and graphic
menus. Connect the LN Series Communicating Sensor
to the controller with a standard Category 5e Ethernet
patch cable fitted with RJ-45 connectors.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 7

If you make your own patch cable, use Category 5e

Figure 17: T568A and T568B Crimp Wire

Sequence for an RJ-45 Connector

T568A T

568

B

Stripe Solid

12345678

1234567

8

Pair 3 Pair 1 Pair 2 Pair 4 Pair 2

Pair 1Pair 3Pair

4

Key

:

Figure 18: Pins on RJ-45 Jack Face

cable crimped with the RJ-45 connectors either as
T568A or T568B. .

IMPORTANT: Do not crimp one connector as
T569A and the other as T568B on the same cable.

IMPORTANT: Protect the controller’s connector
from being pulled on when a cable to the LN Series
Communicating Sensor is connected. Create a
strain-relief by looping and attaching it to a solid
object with a nylon tie so a tug on the cable does not
pull out the connector from the controller

Table 2: T568A and T568B Terminations for an

RJ-45 Connector

Pin T568A (at both

cable ends)

T568A (at both
cable ends)

Pair Color Pair Color

1 3 white/green

stripe

2 3 green solid 2 orange solid
3 2 white/orange

stripe

4 1 blue solid 1 blue solid
5 1 white/blue stripe 1 white/blue stripe
6 2 orange solid 3 green solid
7 4 white/brown

stripe

8 4 brown solid 4 brown solid

2 white/orange

stripe

3 white/green

stripe

4 white/brown

stripe

Figure 17 shows the result of a crimped RJ-45
connector.

Patch cables fitted with connectors that Johnson
Controls supplies are wired as T568B.

For more information and requirements for connecting
the LN Series Communicating Sensors, including
information about network topology and length, cable
type, and setting the Subnet ID, refer to the LN Series

Communicating Sensor Installation Instructions
(LIT-12011795) and the L

ONWORKS LN-Series Network

Communication and Interface Guide Technical Bulletin
(LIT-12011253).

Output Wiring

The LN-VAVCF-12 controller has physical connections
for digital outputs. The power source type for digital
outputs is hardware configurable and must be
configured by changing the jumper settings on the
printed circuit board (for jumper selection, see

Configuration Jumper Location and Iden tif icat ion

Note: For a wire length less than 75 ft (23 m), use
either a shielded or unshielded 18 AWG wire.

Note: For a wire length up to 200 ft (61 m) long, we
recommend using a shielded 18 AWG wire.

).

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions8

Note: The wire should be shielded on the controller

Figure 19: Digital Output with External Power

Supply – Relay

Figure 20: Digital Output with Internal Power

Supply – Relay

Figure 21: Digital Output with External Power

Supply – Floating Actuator

Figure 22: Digital Output with Int ernal Supply –

Floating Actuator

side; keep the shield length as short as possible.

IMPORTANT: Before connecting any output device
(actuator, relay, etc.) to the controller, refer to the
manufacturer’s installation guide.

Wiring Digital Outputs (DOx)

Y o u can configure the digit al output s either as powe red
outputs or non-powered outputs. When wiring digital
outputs:

• the non-powered output type does not have any
voltage on the output terminals when the output is
active. Power must be supplied externally.

• the powered output type has 24 VAC on the output
terminals when the output is active. Power is
therefore supplied internally by the controller.

If a 24 V AC relay is being controlled, connect the di gital
output according to Figure 19 (external power supply)
and Figure 20 (internal power supply).

Note: The LN-VAVCF-12 controller is shipped with all
digital outputs configured as powered outputs.
Maximum output current for all digita l outputs (power ed
or non-powered) is .05 A continuous or 1 A at 15% duty
cycle for a 10-minute period.

IMPORTANT: To measure the state of a digital
output (TRIAC), an external load must be
connected.

DO1 and DO2 share the same C1-2 common termin a l
and are controlled by a single jumper; therefore, they
must be set identically. Similarly, DO2 and DO3 (VAV
and VVT products only) share the same C3-4 comm on
terminal and are controlled by a single jumper and
must be set identically . The jumpers specify whether an
internal or external power source is being used. See

Configuration Jumper Location and Identification

.

If a floating actuator is being controlled, connect the
digital output as shown in Figure 21 and Figure 22.

Note: In Figure 21 an external power supply is used;
in Figure 22 an internal power supply is used.

Wiring Universal Outputs (UOx)

The universal outputs can be configured to provide
either a linear signal ranging from 0 to 10 VDC or a
discrete signal of 0 to 12 VDC.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 9

The discrete signal can be used to generate a Pulse
Wave Modulation (PWM) signal or a simple two-state
signal. These outputs are protected by an auto-reset
fuse.

Wiring Discrete Outputs

If a 12 VDC relay is being controlled, connect it to a
universal output (Figure 23).

If an analog actuator is being controlled, connect the

Figure 25: Voltage 0 to 10 VDC Universal Output –

Analog Actuator

Figure 26: Communications Wiring

Figure 27: LONWORKS Network Free Topology

Controller

LN-Series Sensor

22AWG (0.65mm) Unshielded Twisted Pair Network Cable

Free-Topology

Network

Cat5

e network cable

: LN

Series Sensor Subnetwork

Bus and L

ONWORKS

Network

0 to 10 VDC output, along with an external 24 VAC
power source, to the analog actuator as shown in
Figure 25.

Communications Wiring

Approved cable types for LONWORKS®
communications are 22 AWG (0.65 mm), twisted pair,
UNSHIELDED.

The L

ONWORKS communication wire is polarity

insensitive, and can be laid out in a bus, star, loop or
free topology. For loop topology, polarity is important;
take special care when connecting the L
network to avoid a short circuit.

Note: We recommend bus topology network
configuration for all L

ONWORKS communication wiring

because it allows for easy network troubleshooting.
Connect both wires to the LON1 and LON2 terminals of

the controller. If inserting multiple wires in the
terminals, make sure to properly twist wires together
prior to inserting them in the terminal connectors
(Figure 26).

ONWORKS

You can also refer to the Echelon® Junction Box and

Wiring Guideline for Twisted Pair L

ONWORKS Networks

(Part No. 005-0023-01).

IMPORTANT: Use proper network terminators
depending on the type of network topology used.
Failure to do so may result in communication errors
between controllers. Do not use multiple gauges of
cable on the same communication bus, as this may
also result in communication errors.

Supported Quantity of Sensors Per Controller

LN VAV/VVT controllers support 4 LN Communicating
Sensors. See Table 3 for the maximum allowable
sensors per controller. You must set the Subnet ID of
all sensors within the address range listed in Table 3.

Ta b le 3: Number of LN Communicating Sensors

Controller Models Support

Controller Series Maximum

Number of
Sensors

LN-VAV/VVT 4 1–4

Selecting Network Terminators

For bus topology, two network terminators are required
(one at each end of the bus topology channel). For a
free topology, one network terminator is required. You
can put it anywhere on the channel.

When used with an LN Series Communicating Sensor,
the network can be accessed at the sensor’s audio
plug port when the two Net to Subnet Port Settings
jumpers inside the controller are set to Enable. For
jumper location, see Configuration Jumper Location
and Identification). Setting these jumpers to Enable
connects the main L

ONWORKS network to the LN

Series Communicating Sensor subnetwork Cat 5e
cable, creating a free topology L

ONWORKS network with

maximum allowable total length of all segments
combined to be no more than 1,600 feet (500 meters).

Subnet ID
Address
Range

For information and detailed explanations on network
topology and wire length restrictions, refer to th e

L

ONWORKS LN-Series Network Communication and

Interface Guide Technical Bulletin (LIT-12011253).

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions10

The Cat 5e cable length may also be restricted by the
maximum allowable subnetwork bus len gt h. For mo re
information, refer to the LN Series Communicating
Sensors Installation Instructions (LIT-12011795).

This configuration mixes the cable gauge used for the

Figure 28: Metal Enclosure Mount

Figure 29: Telephone Socket Location

network, which under rare conditio ns ma y ca us e
communication problems. To avoid these problems,
carefully test for good communication on the entire
network. If there are any network problem s, s ee

Troubleshooting

.

Wireless Installation

The LN-VAVCF-12 controller can receive input signals
from wireless devices when connected to a wireless
receiver and programmed with GPI software.
Compatible wireless devices include temperature
sensors, duct sensors, window and door contacts, and
light switches. These devices are easy to install, and
can be mounted on a wide range of building materials.

For information on selecting mounting locations for the
LN Series wireless option controllers, refer to the LN

Series Wireless Solution Guide Technical Bulletin
(LIT-12011628).

Mounting the Wireless Receiver

There are three mounting options: on a wall or ceiling
with double-sided tape, on a wall or ceiling with
mounting screws, or on a metal enclosure using a
1/2-inch National Pipe Thread (NPT) hub.

Regardless of the mounting method, the wireless
receiver should be 16 inches (41 cm) or more away
from the controller or any other network cables.

2. Place the Wireless Receiver onto the metal
enclosure and align the NPT hub to the hole.

3. Use the cap to tighten the Wireless Receiver onto
the enclosure.

Connecting the Wireless Receiver

Connect the wireless receiver to the controller with the
included 6.5 foot (2 m) telephone cable (4P4C modular
connectors). Locate the telephone socket inside the
device (Figure 29).

Wall or Ceiling Mount with Double-Sided Tape

To mount on a wall using double-sided tape, first apply
the tape to the back of the receiver and then stick the
receiver onto the desired wall or ceiling location.

Wall or Ceiling Mount with Screws

To mount the wireless receiver with screws:

1. Separate the front and back plates on the receiver
to open it.

2. Use the mounting holes on the back plate to mark
the wall or ceiling location.

3. Drill the holes.

4. Clean the holes, insert wall anchors, and fasten the
back plate with the screws.

Metal Enclosure Mount

To mount onto a metal enclosure:

1. Affix the 1/2-inch NPT hub to the bottom of the
Wireless Receiver. Ensure the cap of the NPT hub
is undone.

Connecting to the Controller Wireless Port

Each controller has a wireless port where you connect
the telephone cable. Uncover the controller to locate
the wireless port on the PCB board (marked as
Wireless Module).

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 11

Disconnecting the Wireless Port

!

To disconnect the plugged-in telephone cable from the
controller’s wireless port, pass a pointed object through
the hole above the wireless port and press on the top of
the connector while gently pulling out the cable.

Terminal Block Cover

In certain jurisdictions, terminal block covers are
required to meet local safety regulations. Terminal
block covers are available for all controllers and are
used to conceal the controllers’ wire terminals.
Terminal block covers are optional and sold separately.

Maintenance

CAUTION: Risk of Electric Shock.

Disconnect the power supply before
making any electrical connections to
avoid electric shock.

MISE EN GARDE : Risque de décharge
électrique.

Débrancher l'alimentation avant de
réaliser tout raccordement électrique afin
d'éviter tout risque de décharge
électrique.

• clean the outside of the front plate and the inside of
the back plate with a dry cloth.

• verify the tension of all wires and cables each time
you service the controller.

Disposal

The Waste Electrical and Electronic Equipment
(WEEE) Directive sets regulations for the recycling and
disposal of products. The WEEE 2002/96/EG Directive
applies to stand-alone products that can function on
their own and are not a part of another system or piece
of equipment. For this reason, Johnson Controls®
products are exempt from the WEEE Directive.
Nevertheless, they are marked with the WEEE symbol,
indicating the devices are not disposed with municipal
waste.

Dispose of products at the end of their useful life
according to local regulations and the WEEE Directive.

Each controller requires minimal maintenance, but it is
important to:

Troubleshooting

Table 4: Troubleshooting (Part 1 of 3)

Problem Possible Cause Solution

Device is powered but does
not turn on.

Device cannot
communicate on L
network.

ONWORKS

Fuse is blown. Disconnect the power. Check the fuse integrity. Reconnect

the power.

Power supply polarity Verify consistent polarity is maintained between all

controllers and the transformer. Ensure that the 24 V COM
terminal of each controller is connected to the same
terminal on the secondary side of the transformer. See
Figure 7 and Figure 8.

Absent or incorrect supply
voltage

Overloaded power
transformer

Network not wired property Double-check the wire connections are correct.
Absent or incorrect network

terminators

1. Check power supply voltage between 24 VAC +
and 24 COM pins to ensure it is within acceptable limits.

2. Check for a tripped fuse or circuit breaker.

Verify the transformer used is powerful enough to supply all
controllers.

Check the network terminator(s).

15%

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions12

Table 4: Troubleshooting (Part 2 of 3)

Problem Possible Cause Solution

Controller communicates
well over a short network
but does not communicate
on a large network.

Hardware input is not
reading the correct value.

Hardware output is not
operating correctly.

Flow sensor is not giving
proper readings.

Network length Check that the total wire length does not exceed

specifications. See to Table 1.

Wire type Check that the wire type agrees with the specifications.

Network wiring problem Verify the wire connections are correct.
Absent or incorrect network

terminators

Extra capacitance Verify that no extra capacitan c es are connected to the

Number of devices on
network segment exceeded

Network traffic Query node statistics to check for errors. Use a LON

Input wiring problem Check that the wiring is correct according to this manual

Open circuit or short circuit Using a voltmeter, check the voltage on the input terminal.

Configuration problem Using a device configuration plug-in or wizard, check the

Over-voltage or over-current
at an input

Blown fuse (auto reset) Disconnect the power and outputs terminals. Wait a few

Output wiring problem Check that the wiring is correct according to this manual

Configuration problem Using the device configuration plug-in or wizard, check the

0-10 V output, 24 VAC
powered actuator is not
moving

Tubing connection problem Verify the tubing is installed properly and that the tubing is

Device is not calibrated
properly

Verify your wire is UNSHIELDED. See Typical VAV
Application Wiring Diagram.

Check the network terminators. Incorrect or broken
terminators make the communication integrity dependent
upon a device’s location on the network.

network other than the standard FTT circuit, and a
maximum of 3 meter stub (in bus topology).

The number of devices on a channel should never exceed

64. Use a router or a repeater in accordance to the

ONWORKS LN-Series Network Communication and

L
Interface Guide Technical Bulletin (LIT-12011253).

protocol analyzer to check network traffic.

and according to the peripheral device’s manufacturer.

Short circuit (0 V) and open circuit (5 V).

configuration of the input. Refer to the device’s user guide
for additional information.

An over-voltage or over-current at one input can affect the
reading of other inputs. Respect the allowed voltage/
current range limits of all inputs. See the input range limits
in the Technical Specifications

seconds to allow the auto-reset fuse to cool down. Check
the power supply and the output wiring. Reconnect the
power.

and according to the peripheral device’s manufacturer.

configuration of the output. Refer to the device user’s guide
for more information.

Check the polarity of the 24 VAC power supply connected
to the actuator while connected to the controller. Reverse
the 24 VAC wire if necessary. Check the jumper setting for
the external power supply as shown in Figure 21.

not bent. Ensure the high and low pressure sensors are not
inverted.

Recalibrate the VAV controller. Refer to the controller user
guide for more information about VAV controller calibration.

section.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 13

Table 4: Troubleshooting (Part 3 of 3)

Problem Possible Cause Solution

Wireless Device is not
working correctly.

Damper is not opening or
closing properly.

Rx/TX LEDs
RX LED is not blinking. Data is not being received from the L
TX LED is not blinking. Data is not being transmitted onto the L

Device not associated to
controller

Power discharge Recharge the device with light (if solar-powered) or replace

Device too far from the
Wireless Receiver

Configuration Problem Using the device configuration plug-in or wizard, check the

Mechanical stops not in
proper position

Drive time not set up
correctly for external damper

VAV still in Calibration mode Complete the calibration process in LN-Builder.
Controller in Override Set the Override to OFF in the object manage screen in

Using the device configuration plug-in or wizard, check the
configuration of the input. Refer to the device’s user guide
for more information.

the battery (if battery-powered). Ensure sufficient light
intensity (200lx for 4 hours/day).

Reposition the device to be within the range of the Wireless
Receiver. Refer to the LN Series Wireless Solution Guide
Technical Bull etin (LIT-120116828).

configuration of the input. Refer to the LN Series Wireless

Solution Guide Technical Bulletin (LIT-12011628)

The two mechanical stops must be positioned to stop the
damper motion when it is completely closed and
completely opened. The mechanical stops can be moved
by increments of 5°.

Ensure the external damper drive time is set to the correct
value (in the plug-in or wizard).

LN-Builder.

.

ONWORKS data bus.

ONWORKS data bus.

Status LED Operation

Table 5: Status LED Operation Guide – Normal Operation

Operation Service

Initialization: the device is starting up.

One Fast Blink
Fast Blink Continuous

(150 ms On, 150 ms Off, Continuous)
The Status LED is Always OFF The controller is operating normally.

Firmware upgrade in is progress and the controller operation is
temporarily unavailable. The new firmware is being loaded into
memory and the process takes a few seconds. Do not interrupt power
to the device during this time.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions14

Table 6: Status LED Operation Guide – Repeats every 2 seconds (highest priority first)

Operation Service
Long blink continuous

(1s On, 1s Off, Continuous)

The controller is not configured.
Appropriate action: Commission the contro l l er.

Long Long Long Blink
(800 ms On, 300 ms Off, 800 ms On, 300 ms Off, 800 ms
Off)

Long Short Short Short Blink The controller is in bypass mode.

Short Short Long Blink Poor-quality power; the device has browned-out: The

Fast Blink 12x Wink: The wink function identifies a device.

The controller is offline.
Appropriate action: Set the controller online.

Appropriate Action: Set the controller online

voltage at the 24 VAC and 24 VCOM terminals has gone
below the device’s acceptable limit during powerup.

Technical Specifications

LN-VAVCF-12 (Part 1 of 3)

Product Codes LN-VAVCF-12
Power Requirement Voltage: 24 VAC/DC; +

Protection: 2 A user-replaceable fuse; 3 A user-replaceable fuse for Triacs when using

the internal power supply

Consumption: 10 VA typical plus all external loads
Maximum Consumption: 85 VA

Environmental Operating Temperature: 0 to 50°C, (32 to 122°F)

Storage Temperature: -20 to 50°C, (-4
Relative Humidity: 0 to 90% noncondensing

General Communication: LonTalk® protocol

L

ONMARK Interoperability Guidelines: Version 3.4

Device Class: SCC VAV
Processor: STM32 (ARM Cortex™ M3) MCU, 32 bit
Processor Speed: 68 MHz
Memory: 384 KB Nonvolatile Flash (applications), 1 MB Nonvolatile Flash (storage)

64 KB RAM

Media Channel: TP/FT-10; 78 Kbps
Communication: LonTalk® protocol
Status Indicator: Green LED - power status and LAN TX, Orange LED - service and LAN

RX

L

ONMARK Functional Profile (pending): Input Objects: Open-Loop Sensor #1, Output

Objects: Open - Loop Sensor #3, Node Object: #0, Real Time Clock: Real Time Keeper
#3300, Scheduler: Scheduler #20020, Calendar: Calendar #20030, Programmable

Programmable Device: Static Programmable Device #410, SCC VAV #8502

Enclosure Material: FR/ABS

Dimensions (with screws): 4.8 x 8.4 x 2.5 in. (122.7 x 214.3 x 63 mm)
Shipping Weight: 2.30 lb (1.05 kg)

15%, 50/60 Hz, Class 2

to 122°F)

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 15

LN-VAVCF-12 (Part 2 of 3)

Inputs Quantity: 4; universal software configurable

Input Types:

Digital: Dry Contact
Voltage: 0 to 10 VDC (40 ohm input impedance), 0 to 5 VDC (high input impedance)
Current: 0 to 20 mA with 249 ohmsexternal resistor (wired in parallel)
Pulse: Dry contact; 500 milliseconds minimum ON/OFF

Resistor Support: 0 to 350k ohms. All thermistor types that operate within this range are

supported. The following temperature sensors are pre-configured:

Thermistor:
Type 2 and Type 3 10k ohm (10k ohm at 25
Platinum:
PT1000 1k ohm (1k ohm at 0°C [32°F])
Nickel:
RTD Ni1000 (1k ohm at 0°C [32°F])
RTD Ni1000 (1k ohm at 21°C [69.8°F])
Input Resolution: 16-bit analog/digital converter

Input Resolution: 16-bit analog/digital converter
Differential Pressure: 0 to 55 Pa (0 to 2.0 in W.C.)
Range:

Accuracy: +
Input Resolution: 0.0167 Pa (0.00007 in. H

Power Supply Output: 15 VDC; maximum 80 mA (4 inputs x 20 mA each)

Integrated Damper Actuator Motor: Belimo® LMZS-H brushless DC Motor

Torque: 35 in·lb, 4 N·m
Degrees of Rotation: 95º adjustable
Fits Shaft Diameter: 5/16 to 3/4 in. (8.5 to 18.2 mm)
Power Supply: from controller

LN Series Communicating
Sensors

Outputs Quantity of Points

Quantity of Points: 4
Models Supported: LN-SVSEN-0, LN-SVSENH-0;
Communication: RS-485
Number of Sensors per controller: up to 4, in daisy-chain configuration
Cable: Cat 5e, 8 conductor twisted pair
Connector: RJ-45

configurable

0.5 A continuous
1A at 15% duty cycle for a 10-minute period
PWM control: adjustable period from 2 to 65 seconds
Floating control: requires two consecutive outputs
Minimum pulse on/off: 500 milliseconds
Adjustable drive time period

External or internal power supply (jumper selectable)
Universal: linear (0 to 10 VDC)
Digital (on/off) PWM, or floating (0 to 12 VDC); software configurable.
Built-in snubbing diode to protect against back EMF, for example when used with a 12

VDC relay.

PWM control: adjustable period from 2 to 65 sec
Floating control:

minimum plus on/off: 500 ms

adjustable drive time period

20 mA maximum at 12 VDC
Minimum load resistance 600 ohms
Output Resolution: 10-bit digital/analog converter

5.5% of reading over operating temperature range

1

: 4; 24 VAC Triac, digital (on/off), PWM, or floating; software

0)

2

°C [77°F])

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions16

Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc.

All other marks herein are the marks of their respective owners. © 2014 Johnson Controls, Inc.

Building Efficiency

507 E. Michigan Street, Milwaukee, WI 53202

LN-VAVCF-12 (Part 3 of 3)

Wireless Receiver

2

Communication: EnOcean wireless standard
Wireless Inputs: 18

4

Supported Wireless Receivers: Wireless Receiver 315 (LN-WMOD315-0) and Wireless
Receiver 868 (LN-WMOD868-0)

Cable: Telephone cord

Connector: 4P4C modular jack
Length: 6.5 ft. (2 m)

Electromagnetic Compatibility CE Emission: EN61000-6-3: 2007; Generic standards for residential, commercial, and

light-industrial environments.

CE Immunity: EN61000-6-1: 2007; Generic standards for residential, commercial, and

light-industrial environments.

FCC: This device complies with FCC rules part 15, subpart B, class B (pending)

Compliance:
United States UL Listed: Under UL 916, Energy Management Equipment

Material

4

: UL94-5VA

Canada UL Listed: Under UL 916, Energy Management Equipment

Material: UL94-5VA

Europe CE Mark – Johnson Controls, Inc., declares that the products are in compliance with the

essential requirements and other relevant provisions of the EMC Directive 2004/108/EC.

1. Floating only available when controller is programmed with LN GPI software.

2. You cannot use an LN Series Communicatin g Sensor and Wireless Receiver at the same time. However, you can temporarily connect an LN Series
Communicating sensor to a controller in wireless mode to perform VAV airflow balancing.

3. Available when an optional external Wireless Receiver is connected to the controller. Refer to the LN Wireless Location Guide for a list of supported EnOcean
wireless modules.

4. All materials and manufacturing processes comply with the RoHS directive and are marked according to the W aste Electrical and Electronic Equipment
(WEEE) directive.

3

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.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 17

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