| Вид документа | Інструкція з монтажу |
|---|---|
| Виробник | JCI |
| Код документа | ln-series-variable-air-volume-vav-and-variable-volume-temperature-vvt |
| Група обладнання | LN Controller |
| Сторінок | 24 |
| Мова документа | англійська |
| Розмір файлу | 0.6 МБ |
Текст документа
LN Series Variable Air Volume (VAV) and Variable Volume
Temperature (VVT) Controllers
Installation Instructions Code No. LIT-12011297
Issued November 2017
LN-VAVLF-2, LN-VAVLN-2, LN-VVTLF-2, LN-VAVCF-2
Application
The LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) controller line is designed to
control various types of Heating, Ventilating, and Air Conditioning (HVAC) equipment, such as baseboards, duct
heaters, multi-stage heaters and fans, coolers, valves, and lights.
The controllers are based on LONWORKS® technology for peer-to-peer communication between controllers and are
LONMARK® network certified.
North American Emissions Compliance
United States
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.
Canada
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.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature
(VVT) Controllers Installation Instructions
1
Installation
For proper installation and subsequent operation of the LN-VAV/VVT controller, follow these recommendations:
• Upon unpacking your controller, inspect the contents of the carton 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. Record the Neuron® ID located on top of the device. You need it for
commissioning the device.
• 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.
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) and Variable Volume Temperature (VVT) Controllers Installation Instructions
2
Dimensions
Figure 1: LN-VAVLF, LN-VAVCF, and LN-VVTLF Controller Dimensions, mm (in.)
Figure 2: LN-VAVLF, LN-VVTLF, and LN-VAVCF Controller Components
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
3
190 [7. 48 ]
54 [2.13 ]
61.5 [2.42]
10 11
[0.40] [0.43 ]
5 [0.2]
High pressure
Bracket
mouting kit
Low pressure
26.5 [1.04]
3 mm
0. 12 in
Units Legend: mm [ inches]
Figure 3: LN-VAVLN Controller Dimensions, mm (in.)
Figure 4: LN-VAVLN Controller Components
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
4
Mounting
Location Considerations
Use the provided screws and integrated mounting brackets on the LN-VAVLN-2 controller to mount.
This mounting procedure pertains to the controllers with built-in actuators (LN-VAVLF, LN-VVTLF, and
LN-VAVCF). Units with a damper actuator only have one screw.
The controllers are 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 assessable.
Note: The controller must be fitted 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, 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 the controller.
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.
3. Locate the damper position by the marking typically found on the end of the damper shaft (Figure 5).
Figure 5: Damper Shaft
Markings
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 5.
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
tween 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.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
5
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.
10. Finalize the installation by rotating the damper to the full open position.
Figure 6: Mounting a VAV or VVT Device on a Damper Shaft
Risk of Personal Injury and 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.
Risque de blessure et 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.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
6
Wiring
Risk of Electric Shock.
Disconnect the power supply before making electrical connections to avoid electric shock.
Risque de décharge électrique.
Débrancher l'alimentation avant de réaliser tout raccordement électrique afin d'éviter tout risque de décharge
électrique.
IMPORTANT: Use copper conductors only. Make all wiring connections in accordance with local, national, and
regional regulations. Do not exceed the control’s electrical ratings.
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 12 AWG (0.645 - 2.052 mm diameter) per
pole; however, power cables must remain between 18 and 14 AWG (1.024 - 1.628 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).
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.
Input Wiring
The LN-VAVLF, LN-VAVCF, and LN-VVTLF controllers have physical connections for four inputs that are software
configurable from within the device’s LNS® plug-in. 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.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
7
Wiring Digital Inputs
Use this input configuration to monitor digital dry contacts, as well as pulsed contacts (LN-VAVCF-2 only).
Figure 7: Digital Dry Contact (NO and NC)
Resistive 10k ohm Inputs
Use this input configuration to monitor 100k ohm and 1000k ohmsRTDs, 10k ohm Type 2 and Type 3 thermistors,
and potentiometers (10k or 100k ohms on LN-VAVCF-2 only).
RTD / U Ix
Ther mis tor C OM
Figure 8: RTD/Thermistor Input
Figure 9: 10k ohm Potentiometer Input
When you use a 100k ohm input, keep the wire length short to avoid a possible temperature offset; for example,
18AWG 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. Connect the current input if the transducer is externally powered.
Use a transducer with 2-wire, 4-20 mA. See Figure 10.
Figure 10: Current Input - 2 Wire Transducer
Connect the current input if the transducer is powered with 3-wire, 4-20 mA. See Figure 11.
Figure 11: Current Input with Internal Power Source
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
8
For information on selecting mounting locations for the LN Series wireless controllers, refer to the LN Series
Wireless Solution Guide Technical Bulletin
(LIT-12011628).
Mounting the Wireless Receiver
You have 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.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
9
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 12: Power Wiring
IMPORTANT: Maintain proper polarity and voltage or current ratings. Improper polarity or exceeding the
voltage or current ratings will void the warranty.
Connect the current input according to Figure 13 if the transducer is powered by its own power source.
Figure 13: Current Input - Transducer
with Its Own Power Source
Wiring Voltage Inputs
Voltage inputs have a range of 0 to 10 VDC. Connect the voltage input according to Figure 14 if you are using a 3-
wire, 0-10 V transducer.
Transduc er
0 -10V UIx
+
C o mmo n COM
24V A C
24V A C
Figure 14: Voltage Input - 3-wire
Transducer
Connect the voltage input according to Figure 15 if the transducer is powered by its own power source.
Figure 15: Voltage Input - Transducer with its
own Power Source
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
10
Output Wiring
The LN VAV/VVT controllers have physical connections for either digital outputs and universal outputs, depending
on the type and model. The power source type for digital outputs is hardware configurable and must be configured
by changing the jumper settings on the printed circuit board. The universal outputs are software configurable.
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.
Note: The wire should be shielded on the controller side and keep the shield length as short as possible.
Wiring Digital Outputs (DOx)
You can configure the digital outputs as either powered outputs or non-powered outputs. When wiring:
• 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 VAV/VVT controllers are shipped with all digital outputs configured as powered outputs. Maximum
output current for all digital outputs (powered or non-powered) is 1 A.
DO1 and DO2 share the same C1-2 common terminal and are controlled by a single jumper; therefore, they must
be set identically. Similarly, DO3 and D04 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.
If a 24 VAC relay is being controlled, connect the digital output according to Figure 16 (external power supply) and
Figure 17 (internal power supply).
Ground external power supplies as shown in Figure 16 and Figure 17.
Figure 16: Digital Output with External Power
Supply
DOx A2
JUMPER Cx-x A1
SETTINGS 24VAC Relay
Figure 17: Digital Output with Internal Power
Supply
Use an external fuse on the 24 VAC side (secondary side) of the transformer to protect all devices against power
line spikes (Figure 12).
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
11
If a floating actuator is being controlled, connect the digital output according to Figure 18 and Figure 19.
Actuator
DOx ~
JUMPER Cx-x
2 4V A C
DOx ~
SETTINGS
Figure 18: Digital Output with External Power
Supply - Floating Actuator
A ctuator
DO x ~
Cx -x
JUM PE R
DO x ~
S ETT ING S
Figure 19: Digital Output with Internal
Power Supply - Floating Actuator
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 use 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 21). When a relay with universal
output, a diode be connected in parallel to protect the controller from back-emf current, which occurs when the
relay is turned off. It is recommended to use diodes that are part of the 1N4004x family and place them close to the
relay.
UOx A2
COM A1
12VDC Relay
Figure 21: Discrete 0 or 12 VDC Universal
Output - Relay
Wiring Voltage Outputs
Connect the 0 to 10 VDC output according to Figure 22.
UOx 0-10 VDC
COM Common
Figure 22: Voltage 0 to 10
VDC Universal Output -
Analog Actuator
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
12
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 (Figure 23).
Actuator
-
COM ~ +
2 4V A C
UOx 0 - 10 V D C
Figure 23: Voltage 0 to 10 VDC
Universal Output - Analog
Actuator
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 LON network to avoid short circuit.
Note: We recommend the Bus topology network configuration because it allows for easy network troubleshooting
for LONWORKS communication wiring.
Connect both wires to the LON1 and LON2 terminals of the controller. If you are inserting multiple wires in the
terminals, make sure to properly twist wires together prior to inserting them in the terminal connectors (Figure 24).
C ontr oller 1
L ON1
LON Netw ork
L ON2
C ontr oller 2
L ON1
L ON2
Figure 24: Communications WIring
For additional information and detailed explanations on network topology and wire length restrictions, refer to the
Echelon® Junction Box and Wiring Guideline for Twisted Pair LONWORKS Networks
(Part No. 005-0023-01).
Note: 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.
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.
LN-VSTAT Sensor for VAV Wiring
The LN-VAVLF-2 and LN-VVTLF-2 controllers are compatible with the LN-Sensor line of standard room sensors.
The LN-VAVCF-2 controller does not support the LN-VSTAT sensor. Refer to the LN-VSTAT Installation Instructions
(LIT-12011302).
Networking Guide
To commission a device and add it to a LONWORKS network, you need to use the device plug-in as well as the.xif
and.apb files. To obtain the files:
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
13
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.
Table 1: Maximum Number of VAV Devices on a Power Run
AWG Power Run Maximum Number of Maximum Number of Maximum Number of
Total Cable Devices at 7 VA per Devices at 10 VA per Devices at 15 VA per
Length device1 device2 device3
144 75 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 with 1 sensor and actuator active. No external loads.
2. Typical VAV with 1 sensor, 2 triac loads (1.6 VA each), 1 analog output (20 mA), and actuator active.
3. Typical VAV with 1 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.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
14
11. Disconnect the power to the controller and remove the jumper.
Figure 25: E-Blank Jumper (J22) Location
12. Reconnect the power. The service LED blinks twice and becomes solid indicating the controller is application-
less.
13. Load the proper .apb file into the controller.
Note: If the device already exists in the LNS database, you must use the Load or Commission option in LN-
Builder 3 to download the .apb file. Do not use the Replace option.
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.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
15
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.
Figure 26: Metal Enclosure Mount
Neuron ID and Service Pin
To commission a device and add it to a LONWORKS network, you need the Neuron ID of the device. To obtain the
Neuron ID:
• manual entry: the Neuron ID address and bar code are located on a sticker on the device.
• service pin: pressing the service pin on the device broadcasts the Neuron ID on the LONWORKS network.
Memory Erase Jumper
The LN VAV/VVT controllers feature an E-Blank jumper which can be used to erase the Neuron chip. If you load an
incorrect .apb file into the controller, the Neuron chip’s memory becomes corrupt. Use the E-blank jumper to correct
the problem by returning the chip to an application-less state. The E-Blank jumper is labelled J22 on the PCB
board.
To erase the Neuron chip’s memory using the E-Blank jumper:
1. Disconnect the power to the controller.
2. Place a jumper on the pins labelled J22 on the board (Figure 25).
3. Reconnect power to the controller.The amber colored service Light-Emitting Diode (LED) blinks rapidly
indicating that it is erasing the Neuron chip’s memory. When the light becomes solid (and stops blinking), the
erase procedure is complete.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
16
Connecting the Wireless Receiver
Connect the wireless receiver to the controller with the included telephone cable (4P4C modular connectors).
Locate the telephone socket inside the device (Figure 27).
Figure 27: Telephone Socket
Location
Connecting to the Controller Wireless Port
The wireless-option controllers have a wireless port where you connect the telephone cable. Locate the wireless
port on the bottom of the controller.
Figure 28: Enable Wireless Jumper (J16)
To enable the wireless jumper, remove the jumper J16 between the left and middle Disable pins and connect it
between the middle and right Enable pins.
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.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
17
Typical Variable Air Volume Application Wiring
Diagram
Figure 29 shows the typical power and network connections with a floating actuator output and sensor. Figure 30
shows the typical power and network connections with a two-stage digital output.
Sensor
LON2
LON1 SMRT-
SMRT- SMRT+
SMRT+ LON1
UI4 LON2
UI3
COM
UI2
UI1
UO6
COM
UO5
DO4
DO3 Heating
DO2 Floating
Actuator
CO1
24 VAC
PRESSURE 24V COM
HIGH LOW
120V/AC
Figure 29: LN-VAVxx Typical Wiring Diagram and Network Connections -
Sensor Input and Floating Actuator Output
Sensor
LON2
LON1
SMRT-
SMRT+ Connectors
UI4
UI3 COMMON
COM TEMP
UI2 SETPOINT
UI1
UO6
COM
UO5
DO4
DO3 2-Stage
DO2 Digital
Output
DO1
24 VAC
PRESSURE 24V COM
HIGH LOW
120V/AC
Figure 30: LN-VAVxx Typical Wiring Diagram and Network Connections -
Sensor Input and Two-Stage Digital Output
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
18
Troubleshooting
Table 1: Troubleshooting (Part 1 of 2)
Problem Possible Cause Solution
Device is powered but does Fuse is blown. Check the fuse integrity; also ensure the green power LED
not turn on. next to the service pin is on.
Power supply polarity Verify consistent polarity is maintained between all
controllers and the transformer.
Device cannot Absent or incorrect supply Check power supply voltage between 24 VAC and COM
communicate on an FTT voltage pins to ensure it is within acceptable limits. Check for a
network. tripped fuse or circuit breaker.
Overloaded power Verify the transformer used is powerful enough to supply all
transformer controlled devices.
Network not wired property Double-check the wire connections are correct.
Absent or incorrect network Check the network terminators.
terminators
Device communicates well Network length Check that the total wire length does not exceed the
over a short network but specifications of the FTT User’s Guide.
does not communicate on a
Wire type Check that the wire type agrees with the specification of the
large network.
FTT User’s Guide. Verify your wire is UNSHIELDED.
Network wiring problem Verify the wire connections are correct.
Absent or incorrect network Check the network terminators. Incorrect or broken
terminators 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 The number of devices on a channel should never exceed
network segment exceeded 64. Use a router or a repeater in accordance to the FTT
User’s Guide.
Network traffic Query node statistics to check for errors. Use a LON
protocol analyzer to check network traffic.
Hardware input is not Input wiring problem Check that the wiring is correct according to this manual
reading the correct value. 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 (10 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.
Hardware output is not Output wiring problem Check that the wiring is correct according to this manual
operating correctly. and according to the peripheral device’s manufacturer.
Configuration problem Using the device configuration plug-in, check the
configuration of the output. refer to the device user’s guide
for more information.
0-10 V output, 24 VAC Check the polarity of the 24 VAC power supply connected
powered actuator is not to the actuator while connect to the device. Reverse the 24
moving VAC wire if necessary. Check the jumper setting for the
external power supply as shown in Figure 18.
Flow sensor is not giving Tubing connection problem Verify the tubing is installed properly and that the tubing is
proper readings. not bent. Ensure the high and low pressure sensors are not
inverted.
Device is not calibrated Recalibrate the VAV controller. Refer to the controller user
properly guide for more information about VAV controller calibration.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
19
Table 1: Troubleshooting (Part 2 of 2)
Problem Possible Cause Solution
Damper is not opening or Mechanical stops not in The two mechanical stops must be positioned to stop the
closing properly proper position damper motion when it is completely closed and
completely opened. The mechanical stops can be moved
by increments of 5°.
Rotation time not set up Ensure the external damper drive time is set to the correct
correctly for external damper value (in the plug-in or wizard).
VAV still in Calibration mode Complete the calibration process in LN-Builder 3.
Controller in Override Set the Override OFF in the object manage screen in
LN-Builder 3.
Service LED
Table 2: Service LED (Amber Color)
Service LED Operation Status
OFF (does not apply to LN-VAVCF-2) The device is in normal operation.
Repeated Blink (LN-VAVCF-2 only) The device is in normal operation. The LED blinks according to the device
code execution time.
On The device is application-less. Reload the application file (.apb).
Slow Blink The device is unconfigured. Commission the device.
(1 second On, 1 second Off)
Fast Blink Watchdog time out. Application corrupted. Use the E-Blank jumper to
(0.3 second On, 1 second Off) wipe the Neuron chip’s memory. Then load the proper .apb into the device
using a LN-Builder 3.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
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Technical Specification
Table 3: LN-VAVLF, LN-VAVLN, and LN-VVTLF (Part 1 of 2)
Product Codes LN-VAVLF-2, LN-VAVLN-2, and LN-VVTLF-2
Power Requirement Voltage: 24 VAC/DC; +/- 15%, 50/60 Hz, Class 2
Protection: 3 A user-replaceable fuse for triac when using the internal power supply
Consumption: 18 VA
Maximum Consumption: 70 VA if internal power supply is used
Ambient Storage Conditions Ambient Operating Temperature: 0 to 50°C, (32 to 122°F)
Ambient Storage Temperature: -20 to 50°C, (-4 to 122°F)
Ambient Relative Humidity: 0 to 90% noncondensing
General LONMARK Functional Profile: Space Comfort Controller (SCC) VAV #8502
Processor: Neuron® 3150™, 8 bits, 10 MHz
Memory: Nonvolatile Flash 64k (APB application)
Media Channel: TP/FT-10; 78 Kbps
Communication: LonTalk® protocol
LONMARK Interoperability Guidelines: Version 3.4
Enclosure Material: FR/ABS Resin
Dimensions (with screws):
LN-VAVLN-2: 4.8 x 5.9 x 2.5 in. (122.7 x 149.1 x 63 mm)
LN-VAV-LF-2/LN-VVT-LF-2: 4.8 x 8.4 x 2.5 in. (122.7 x 214.3 x 63 mm)
Shipping Weight:
LN-VAVLN-2: 0.92 lb (0.42 kg)
LN-VAV-LF-2/LN-VVT-LF-2: 2.30 lb (1.05 kg)
Inputs Universal software configurable
Input Types:
Digital: Dry Contact
Analog Voltage: 0 to 10 VDC
Analog current: 4 to 20 mA with 249 ohmsexternal resistor (wired in parallel)
Pulse: Dry contact; 500 milliseconds minimum ON/OFF
Resistor Support:
Thermistor: 10kohms Type 2, Type 3 (10k ohms at 25°C [77°F])
Range: -40° to 153°C (-40° to 302°F)
Platinum: PT1000 (1k ohms at 0°C [32°F])
Range: -40 to 150°C (-40 to 302°F)
PT100 (100 ohms at 0°C [32°F])
Range: -40 to 135°C (-40 to 275°F)
Potentiometer: Translation table configurable on several points
Input Resolution: 16-bit analog/digital converter
Differential: Range 0 to 250 Pa (0 to 1 in. H20)
Resolution 0.000162 milli-inches H20, Accuracy ±0.3% full scale
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
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Table 3: LN-VAVLF, LN-VAVLN, and LN-VVTLF (Part 2 of 2) (Continued)
Outputs Digital: 24 VAC Triac, digital (on/off), Pulse Width Modulation (PWM), or floating
0.5 A continuous
PWM control: adjustable period from 2 seconds to 15 minutes
Floating control: requires two consecutive outputs
Minimum pulse on/off: 500 milliseconds
Adjustable drive time period
External or internal power supply (jumper selectable)
Digital LED Occupancy: 0 to 10 VDC dedicated output for occupancy sensor LED,
Maximum 20 mA
Universal: 0 to 10 VDC, digital 0 to 12 VDC (on/off), floating for PWM
PWM control: adjustable period from 2 seconds to 15 minutes
Floating control: requires two consecutive outputs
Minimum pulse on/off: 500 milliseconds
Adjustable drive time period
20 mA maximum at 12 VDC
Minimum load resistance 600 ohms
Output Resolution: 10-bit digital/analog converter
Damper Actuator Torque: 35 in·lb, 4 N·m
Angle of Rotation: 95º adjustable
Fits Shaft Diameter: 5/16 to 3/4 in. (8.5 to 18.2 mm)
Power Supply: from controller
Agency UL Listed: UL916 Energy management equipment
Material: UL94-5VA1
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.
1. All materials and manufacturing processes comply with the RoHS directive and are marked according to the Waste Electrical
and Electronic Equipment (WEEE) directive.
Table 4: LN-VAVCF (Part 1 of 2)
Product Code LN-VAVCF-2
Power Requirements Voltage: 24 VAC/DC; ±15%, 50/60 Hz, Class 2
Protection: 3 A user-replaceable fuse for triac when using the internal power supply
Consumption: 18 VA; triac outputs (2 valves at 4 VA) and 2 outputs with
20 mA load at 12 VDC
Maximum Consumption: 70 VA if internal power supply is used
Ambient Storage Ambient Operating Temperature: 0 to 50°C (32 to 122°F)
Conditions Ambient Storage Temperature: -20 to 50°C (-4 to 122°F)
Ambient Storage Conditions: 0 to 90% noncondensing
General Processor: Neuron® 3150™, 8 bits, 10 MHz
Memory: Non-volatile Flash 128k (storage) Non-volatile Flash 64k (APB application)
Media Channel: TP/FT-10, 78 Kbps
Communication: LonTalk® protocol
LONMark Interoperability: Version 3.4
Device Class: Multi Input/Output (I/O) Module
LONMARK Functional Profile: Input Objects: Open-Loop Sensor #1, Output Objects:
Open-Loop Sensor #3
Enclosure (Housing) Material: FR/ABS Resin
Dimensions (with screws): 4.8 x 8.4 x 2.5 in. (12.7 x 214.3 x 63.0 mm)
Shipping Weight: 2.30 lb (1.05 kg)
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
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Table 4: LN-VAVCF (Part 2 of 2)
Inputs Universal, software configurable
Input Types:
Voltage: 0 to 10 VDC
Digital: Dry Contact,
Analog current: 4-20 mA with 249ohmsexternal resistor
Resistor Support:
Thermistor: 10ohmsType, 2, 3 (1k ohms at 25°C [302°F])
Range: -40 to 150°C (-40 to 302°F)
Platinum: Pt1000 (1k ohms at 0°C [32°F])
Range: -40 to 150°C (-40 to 302°F)
Pt100 (1k ohms at 0°C [32°F])
Range: -40 to 150°C (-40 to 302°F)
Nickel: RTD Ni1000 (1k ohms at 0°C [32°F])
Range: -40 to 150°C (-40 to 302°F)
Potentiometer: translation table configurable on several points
Differential Pressure: Range 0 to 250 Pa (0 to 1 in. H20)
Resolution: 0.000162 milli-in. H20
Accuracy: ±3% full scale
Input Resolution: 16-bit analog/digital converter
Outputs Digital: 24 VAC Triac, digital (on/off), PWM, or floating1, software configurable
0.5 A continuous
PWM control: adjustable period from 2 seconds to 15 minutes
Floating control: requires two consecutive outputs1
Minimum pulse on/off: 500 milliseconds
Adjustable drive time period
External or Internal power supply (jumper selectable)
Digital LED occupancy output: 0-10 VDC dedicated output for occupancy sensor LED
Maximum 20 mA
Universal: 0-10 VDC linear, digital 0-12 VDC (on/off), floating or PWM
PWM control: adjustable period from 2 seconds to 15 minutes
Floating control: requires two consecutive outputs1
Minimum pulse on/off: 500 milliseconds
Adjustable drive time period
20 mA max at 12 VDC, Minimum load 600ohms
Output Resolution: 10-bits digital/analog converter
Damper Actuator Torque: 35 in·lb, 4 N·m
Degree of Rotation: 95º adjustable
Fits Shaft Diameter: 5/16 to 3/4 in. (8.5 to 18.2 mm)
Wireless Receiver Communication: EnOcean wireless standard2, Wireless Inputs: 143
Wireless Receivers: Wireless Receiver 315, Wireless Receiver 868
Cable: telephone cord, connector: 4P4C modular jack, length: 6.5 ft (2m)
Electromagnetic CE Emission: EN61000-6-3: 2007; generic standards for residential, commercial, and light-
Compatibility industrial environments
CE Immunity: EN61000-6-1: 2007; generic standards for residential, commercial, and
light-industrial environments
Compliance UL Listed (US and CDN): UL916 Energy Management Equipment, Material: UL94-5VA
1. Floating only available when controller is programmed with LN GPI software.
2. 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.
3. Some wireless sensors may use more than one input from the controller.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
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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.
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GERMANY USA WUXI JIANGSU PROVINCE 214142
CHINA
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507 E. Michigan Street, Milwaukee, WI 53202
Metasys® and Johnson Controls® are registered trademarks of Johnson Controls.
All other marks herein are the marks of their respective owners. © 2017 Johnson Controls.
LN Series Variable Air Volume (VAV) and Variable Volume Temperature (VVT) Controllers Installation Instructions
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