Johnson Controls LN Series User manual

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 1
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 LONWORKS® technology for
peer-to-peer communication between controllers and is
LONMARK® network certified.
Note: You can configure the LN-VAVCF-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
Canada
Installation
For proper installation and subsequent operation of the
LN-VAVCF-12 controller, follow these
recommendations:
• Inspect the controller for shipping damage. Do not
install damaged devices.
• Allow for proper clearance of device casing, wiring
terminals, and service pin for easy access,
hardware configuration, and maintenance.
•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%,
noncondensing
• Ensure proper ventilation of devices and avoid
areas where corroding, deteriorating, or explosive
vapors, fumes, or gasses may be present.
• Record the Neuron® ID located on the box and on
the side of the controller. You need it for
commissioning the device.
Compliance Statement (Part 15.19)
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,
and
2. This device must accept any interference
received, including interference that may cause
undesired operation.
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.
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.
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.
LN Series Variable Air Volume (VAV) LN-VAVCF-12
Controller
Installation Instructions
LN-VAVCF-12
Code No. LIT-12011802
Issued April 24, 2014
Supersedes January 30, 2013

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions2
Dimensions
Fig: ln_vavcf_12_dimensions
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 Instructions 3
Mounting
This mounting procedure pertains to the LN-VAVCF-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.
1. Place the controller into position on the damper
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.
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.
3. Locate the damper position by the marking
typically found on the end of the damper shaft
(Figure 4).
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 damper closes CCW,
turn the coupler to the CCW mechanical stop
limit. If the damper closes CW, turn 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.
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 the controller.
IMPORTANT: Do not overtighten the screws.
Overtightening may strip the threads and will void
the warranty.
Figure 3: Mounting a LN-VAVCF-12 on a Damper
Shaft
Figure 4: Damper Shaft Markings

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions4
10. Finalize the installation by rotating the damper to
the full open position. Typical VAV Application Wiring Diagram
Figure 5 shows the typical power and network
connections with a floating actuator output and sensor.
!
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 full-
open 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.
Figure 5: Typical Power and Network Connections with an LN Series Communicating Sensor Input and
Floating Actuator Output

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 5
Wiring
Recommendations:
• Use the removable terminal connectors to make all
wiring connections.
• Disconnect the terminal connectors from the
device for wiring.
• 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
LONWORKS 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 AWG (1.024 and 1.630
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).
• Keep input and output wiring in conduits, trays, or
close to the building frame, if possible.
Configuration Jumper Location and
Identification
See Figure 6 for the controller’s on-site configurable
jumpers.
For more information on wiring and powering a VAV
controller that uses a LONWORKS network for
communications, refer to the LONWORKS 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 States, use transformers 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.
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.
IMPORTANT: Do not connect the analog/digital
inputs or common terminals to ground (only if
otherwise stated).
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

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions6
Use an external fuse on the 24 VAC side (secondary
side) of the transformer to protect all devices against
power line spikes (Figure 7).
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.
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.
Table 1: Maximum Number of VAV Devices on a Power Run
AWG Power Run
Total Cable
Length
Maximum Number of
Devices at 7 VA per
Device1
Maximum Number of
Devices at 10 VA per
Device2
Maximum Number of
Devices at 15 VA per
Device3
14475 m (250 feet) 4 2 1
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.
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.
Figure 7: Power Wiring – AC
Figure 8: Power Wiring – DC
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).
IMPORTANT: Before connecting any input
equipment to the controller, refer to the
manufacturer’s installation guide.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 7
Wiring Digital Inputs
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).
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 requirements, 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.
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.
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.
Figure 9: Digital Dry Contact (NO and
NC)
Figure 10: Resistive Input – RTD/Thermistor
Input
Figure 11: Resistive Input – 10k Ohm
Potentiometer Input
Figure 12: Current Input – 2-Wire
Transducer Powered by the Controller
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: Voltage Input – Transducer with Its
Own Power Source

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions8
If you make your own patch cable, use Category 5e
cable crimped with the RJ-45 connectors either as
T568A or T568B. .
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 LONWORKS 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 Identification).
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.
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 white/orange stripe
23 green solid 2 orange solid
32 white/orange
stripe 3 white/green stripe
41 blue solid 1 blue solid
51 white/blue stripe 1 white/blue stripe
62 orange solid 3 green solid
74 white/brown
stripe 4 white/brown stripe
84 brown solid 4 brown solid
Figure 17: T568A and T568B Crimp Wire
Sequence for an RJ-45 Connector
T568A T
568
B
Stripe Solid
12345678
1
2
3
4
5
6
7
8
Pair 3 Pair 1 Pair 2 Pair 4 Pair 2
Pair
1
Pair
3
Pair
4
Key
:
Figure 18: Pins on RJ-45 Jack Face

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 9
Note: The wire should be shielded on the controller
side; keep the shield length as short as possible.
Wiring Digital Outputs (DOx)
You can configure the digital outputs either as powered
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.
Note: The LN-VAVCF-12 controller is shipped with all
digital outputs configured as powered outputs.
Maximum output currentfor all digital outputs (powered
or non-powered) is .05 A continuous or1 A at 15% duty
cycle for a 10-minute period.
DO1 and DO2 share the same C1-2 common terminal
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 common
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 24 VAC relay is being controlled, connect the digital
output according to Figure 19 (external power supply)
and Figure 20 (internal power supply).
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.
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).
IMPORTANT: Before connecting any output device
(actuator, relay, etc.) to the controller, refer to the
manufacturer’s installation guide.
IMPORTANT: To measure the state of a digital
output (TRIAC), an external load must be
connected.
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 Internal Supply –
Floating Actuator

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions10
If an analog actuator is being controlled, connect the
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 LONWORKS 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 LONWORKS
network to avoid a short circuit.
Note: We recommend bus topology network
configuration for all LONWORKS 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).
For information and detailed explanations on network
topology and wire length restrictions, refer to the
LONWORKS LN-Series Network Communication and
Interface Guide Technical Bulletin (LIT-12011253).
You can also refer to the Echelon® Junction Box and
Wiring Guideline for Twisted Pair LONWORKS Networks
(Part No. 005-0023-01).
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.
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 LONWORKS network to the LN
Series Communicating Sensor subnetwork Cat 5e
cable, creating a free topology LONWORKS network with
maximum allowable total length of all segments
combined to be no more than 1,600 feet (500 meters).
The Cat 5e cable length may also be restricted by the
maximum allowable subnetwork bus length. For more
information, refer to the LN Series Communicating
Sensors Installation Instructions (LIT-12011795).
Figure 25: Voltage 0 to 10 VDC Universal Output –
Analog Actuator
Figure 26: Communications Wiring
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.
Table 3: Number of LN Communicating Sensors
Controller Models Support
Controller Series Maximum
Number of
Sensors
Subnet ID
Address
Range
LN-VAV/VVT 4 1–4
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
ON W ORKS Network

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 11
This configuration mixes the cable gauge used for the
network, which under rare conditions may cause
communication problems. To avoid these problems,
carefully test for good communication on the entire
network. If there are any network problems, see
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.
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.
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).
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).
Figure 28: Metal Enclosure Mount
Figure 29: Telephone Socket Location

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions12
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
Each controller requires minimal maintenance, but it is
important to:
• 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.
Troubleshooting
!
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.
Table 4: Troubleshooting (Part 1 of 3)
Problem Possible Cause Solution
Device is powered but does
not turn on. 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.
Device cannot
communicateonLONWORKS
network.
Absent or incorrect supply
voltage 1. Check power supply voltage between 24 VAC + 15%
and 24 COM pins to ensure it is within acceptable limits.
2. Check for a tripped fuse or circuit breaker.
Overloaded power
transformer Verify the transformer usedis powerful enough to supply all controllers.
Network not wired property Double-check the wire connections are correct.
Absent or incorrect network
terminators Check the network terminator(s).

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 13
Controller communicates
well over a short network
but does not communicate
on a large network.
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.
Verify your wire is UNSHIELDED. See Typical VAV
Application Wiring Diagram.
Network wiring problem Verify the wire connections are correct.
Absent or incorrect network
terminators Check the network terminators. Incorrect or broken terminators make the communication integrity dependent
upon a device’s location on the network.
Extra capacitance Verify that no extra capacitances are connected to the
network other than the standard FTT circuit, and a
maximum of 3 meter stub (in bus topology).
Number of devices on
network segment exceeded The number of devices on a channel should never exceed 64. Use a router or a repeater in accordance to the
LONWORKS LN-Series Network Communication and
Interface Guide Technical Bulletin (LIT-12011253).
Network traffic Query node statistics to check for errors. Use a LON
protocol analyzer to check network traffic.
Hardware input is not
reading the correct value. Input wiring problem Check that the wiring is correct according to this manual and according to the peripheral device’s manufacturer.
Open circuit or short circuit Using a voltmeter, check the voltage on the input terminal.
Short circuit (0 V) and open circuit (5 V).
Configuration problem Using a device configuration plug-in or wizard, check the
configuration of the input. Refer to the device’s user guide
for additional information.
Over-voltage or over-current
at an input 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 section.
Hardware output is not
operating correctly. Blown fuse (auto reset) Disconnect the power and outputs terminals. Wait a few seconds to allow the auto-reset fuse to cool down. Check
the power supply and the output wiring. Reconnect the
power.
Output wiring problem Check that the wiring is correct according to this manual
and according to the peripheral device’s manufacturer.
Configuration problem Using the device configuration plug-in or wizard, check the
configuration of the output. Refer to the device user’s guide
for more information.
0-10 V output, 24 VAC
powered actuator is not
moving
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.
Flow sensor is not giving
proper readings. Tubing connection problem Verify the tubing is installed properly and that the tubing is not bent. Ensure the high and low pressure sensors are not
inverted.
Device is not calibrated
properly Recalibrate the VAV controller. Refer to the controller user guide for more information about VAV controller calibration.
Table 4: Troubleshooting (Part 2 of 3)
Problem Possible Cause Solution

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions14
Status LED Operation
Wireless Device is not
working correctly. Device not associated to controller Using the device configuration plug-in or wizard, check the configuration of the input. Refer to the device’s user guide
for more information.
Power discharge Recharge the device with light (if solar-powered) or replace
the battery (if battery-powered). Ensure sufficient light
intensity (200lx for 4 hours/day).
Device too far from the
Wireless Receiver Reposition the device to be within the range of the Wireless Receiver. Refer to the LN Series Wireless Solution Guide
Technical Bulletin (LIT-120116828).
Configuration Problem Using the device configuration plug-in or wizard, check the
configuration of the input. Refer to the LN Series Wireless
Solution Guide Technical Bulletin (LIT-12011628).
Damper is not opening or
closing properly. Mechanical stops not in proper position 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°.
Drive time not set up
correctly for external damper Ensure the external damper drive time is set to the correct value (in the plug-in or wizard).
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
LN-Builder.
Rx/TX LEDs
RX LED is not blinking. Data is not being received from the LONWORKS data bus.
TX LED is not blinking. Data is not being transmitted onto the LONWORKS data bus.
Table 4: Troubleshooting (Part 3 of 3)
Problem Possible Cause Solution
Table 5: Status LED Operation Guide –Normal Operation
Operation Service
One Fast Blink Initialization: the device is starting up.
Fast Blink Continuous
(150 ms On, 150 ms Off, Continuous)
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.
The Status LED is Always OFF The controller is operating normally.

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 15
Technical Specifications
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 controller.
Long Long Long Blink
(800 ms On, 300 ms Off, 800 ms On, 300 ms Off, 800 ms
Off)
The controller is offline.
Appropriate action: Set the controller online.
Long Short Short Short Blink The controller is in bypass mode.
Appropriate Action: Set the controller online
Short Short Long Blink Poor-quality power; the device has browned-out: The
voltage at the 24 VAC and 24 VCOM terminals has gone
below the device’s acceptable limit during powerup.
Fast Blink 12x Wink: The wink function identifies a device.
LN-VAVCF-12 (Part 1 of 3)
Product Codes LN-VAVCF-12
Power Requirement Voltage: 24 VAC/DC; +15%, 50/60 Hz, Class 2
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 to 122°F)
Relative Humidity: 0 to 90% noncondensing
General Communication: LonTalk® protocol
LONMARK 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
LONMARK 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)

LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions16
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°C [77°F])
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: + 5.5% of reading over operating temperature range
Input Resolution: 0.0167 Pa (0.00007 in. H20)
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 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
Outputs Quantity of Points1: 4; 24 VAC Triac, digital (on/off), PWM, or floating; software
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
LN-VAVCF-12 (Part 2 of 3)

Published in U.S.A. www.johnsoncontrols.com
LN Series Variable Air Volume (VAV) LN-VAVCF-12 Controller Installation Instructions 17
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
Wireless Receiver2Communication: EnOcean wireless standard3
Wireless Inputs: 184
Supported Wireless Receivers:WirelessReceiver315(LN-WMOD315-0)andWireless
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
Material4: 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 Communicating 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 Waste Electrical and Electronic Equipment
(WEEE) directive.
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-VAVCF-12 (Part 3 of 3)