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
Loading...