Distech Controls ECL-VAVS User manual

ECL-VAVS Controller
Figure1: ECL-VAVS Controller
Product Description
This document describes the hardware installation procedures for the ECL-VAVS Single Duct Variable Air Volume Controllers.
The Distech Controls Variable Air Volume product line is designed to control and monitor various types of HVAC equipment such as baseboards, single
and multi-stage duct heaters, fans, valves, lights, etc. When connected to a Wireless Receiver, this product line can be used with a variety of wireless
battery-less sensors and switches.
Each controller uses the LONWORKS® technology for peer-to-peer communication between controllers and are LONMARK certified.
General Installation Requirements
For proper installation and subsequent operation of the device, pay special attention to the following recommendations:
£It is recommended that the controller(s) be kept at room temperature for at least 24 hours before installation to allow any condensation that may
have accumulated due to low temperature during shipping/storage to evaporate.
£Upon unpacking, inspect the contents of the carton for shipping damages. Do not install a damaged device.
£The device is designed to operate under environmental conditions that are specified in its datasheet.
£Ensure proper ventilation of the device and avoid areas where corroding, deteriorating or explosive vapors, fumes or gases may be present.
£Record the 12-character Neuron® ID located on either end of the device (shown on a sticker below the barcode), for later commissioning.
£Allow for proper clearance around the device’s enclosure and wiring terminals to provide easy access for hardware configuration and maintenance.
£When installing in an enclosure, select one that provides sufficient surface area to dissipate any heat generated by the device and by any other de-
vices installed in the enclosure. A metal enclosure is preferred. If necessary, provide active cooling for the enclosure.
£The device’s datasheet specifies the power consumption (amount of heat generated), the operating temperature range, and other environmental
conditions the device is designed to operate under.
£Ensure that all equipment is installed according to local, regional, and national regulations.
£Do not drop the device or subject it to physical shock.
£If the device is used and/or installed in a manner not specified by Distech Controls, the functionality and the protection provided by the device may
be impaired.
Any type of modification to any Distech Controls product will void the product’s warranty
Before installation of the Wireless Receiver, verify that local communication regulations allow the installation of wireless devices and
available frequencies to be supported in your area. Refer to the Open-to-Wireless™ Application Guide for more information.
Take reasonable precautions to prevent electrostatic discharge to the device when installing, servicing or during operation. Discharge
accumulated static electricity by touching one’s hand to a well-grounded object before working with the device.
Installation Guide

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Device Markings (Symbols)
Certain markings (symbols) can be found on the controller and are defined as follows:
Symbol Description
CE marking: the device conforms to the requirements of applicable EC directives.
UKCA marking: the device conforms to the requirements of applicable Great Britain regulations.
Products must be disposed of at the end of their useful life according to local regulations.
Read the Hardware Installation Guide for more information.
UL marking: conforms to the requirements of the UL certification.
FCC marking: This device complies with FCC rules part 15, subpart B, class B.
Warning Symbol: Significant information required. Refer to the Hardware Installation Guide.
Alternating Current
Direct Current
General Wiring Recommendations
Risk of Electric Shock: Turn off power before any kind of servicing to avoid electric shock.
£All wiring must comply with electrical wiring diagrams as well as national and local electrical codes.
£To connect the wiring to a device, use the terminal connectors. Use a small flat screwdriver to tighten the terminal connector screws once the wires
have been inserted (strip length: 0.25’’ (6mm), maximum tightening torque 0,4 Nm (3.45 in-lb)).
£Comply with all network and power supply guidelines outlined in the Network Guide.
£Keep wiring separate according to their function and purpose to avoid any ambient noise transmission to other wires. Use strapping to keep these
wires separated. For example, keep power, hazardous voltage, SELV, PELV, network, and input wiring separate from each other.
£Power cables must be between 18 and 14 gauge (0.82 to 2.1mm2 cross-sectional area). When connecting one wire to a controller’s terminal block
clamping cage (pole), the wire must be between 22 and 14 gauge (0.33 and 2.1mm2 cross-sectional area). When connecting two wires to a con-
troller’s terminal block clamping cage, both wires must be the same thickness, both wires must be between 22 and 16 gauge (0.33 to 1.3mm2 cross-
sectional area), and both wires must be of the same type (solid or stranded). Twist the wires together and insert then into the controller’s terminal
block clamping cage. For any other wiring combination (mixed wire thickness, mixed solid and stranded conductors, more than three wires, wire
thickness is out of range), twist the wires together and use a wire nut and a pig tail to connect to the controller’s terminal block connector as show
below.
Controller
Wire Nuts
Terminal Block
Connector
Wire Connections
Pigtails
Figure2: Using a Wire Nut and Pigtail to Wire the Controller
£Keep input and output wiring in conduits, trays or close to the building frame if possible.
£Always use unshielded cabling with a minimum Category 5 (CAT5) cable for ethernet communications.
£Do not connect the universal inputs, analog/digital outputs or common terminals to earth or chassis ground (unless stated otherwise and/or using
shielded Ethernet cable).

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Controller Dimensions & Components
±0.20
[± 5]
2.27 [57.62]
7.90 [200.61]
6.09 [154.76]
0.55 [13.85]
0.86 [21.95]
5.51 [139.93]
2.75 [69.96] 3.70 [94.04]
Profile
0.40 [10.05]
1.25 [31.75]
Inches [Millimeters]
2.27 [57.62]
Sliding Grommet
FrontFront
Damper Shaft
Clamping
Mechanism
Opening for
Damper Shaft
Actuator
Clutch for
Manual
Adjustment
Pressure Sensor Inputs –
High-Low Sensor Connection
Polarity is Unimportant
Service Pin
Figure3: ECL-VAVS Dimensions and Components
7.90 [200.61]
6.09 [154.76]
0.55 [13.85]
0.86 [21.95]
3.70 [94.04]
Sliding Grommet
Front Profile
10.84 [275.26]
5.42 [137.63]
Ø 0.875 (7/8)
[Ø 22.23]
4 Positions
½-inch
knockout:
0.40 [10.05]
1.25 [31.75]
Inches [Millimeters]
±0.20
[± 5]
Figure4: ECL-VAVS Controller with Terminal Covers Dimensions
Mounting Instructions
Each controller is specially designed for easy installation either directly on an air duct or in a panel by using the integrated mounting collar and the screw
that is provided with the controller. This mounting arrangement opposes the torque applied to the damper shaft.
Mounting Position
To prevent condensation on the VAV box’s damper shaft from entering the controller’s electronics, the controller’s mounting orientation should be any
position above the damper shaft (between 0 and 180°) so that any condensation from the damper shaft will fall away from the controller’s electronics.
Further countermeasures may be required in some installations. This is important in hot, humid climates where the VAV box is located near exterior
doors or loading bays that may be blocked open or when the VAV box air supply is below 50°F.

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VAV Box Shaft
0° 180°
90°
270°
Figure5: Recommended Mounting Position Angle Range
Mounting Procedure for Terminal Covers
Terminal covers can be added to any VAV controller to protect inadvertent contact with the controller’s electrical connections.
£A terminal cover kit can be added to both sides of the controller.
Controllers with terminal block covers can only be mounted on a flat surface that is sufficiently large to provide space around the installation. In this sce-
nario, conductors must be made inaccessible and wiring must comply with local wiring regulations and methods appropriate for fixed equipment installa-
tion in a building (the use of cable conduits and trunking for example).
1. Separate the cover from the base of the terminal covers.
2. Attach the base of the terminal cover(s) to the underside of the VAV controller’s body with the tabs shown in Figure 7 .
3. Install the VAV controller according to the next procedure, VAV Controller Mounting Procedure.
Tabs that latch to the VAV controller’s body
Figure6: Terminal Cover Attachment Tabs
4. Connect and wire the controller according to the procedures shown later in this document.
VAV Controller Mounting Procedure
Mount the controller as follows:
1. The VAV controller comes with the sliding grommet pre-installed.
2. Orient the controller into position on to the damper shaft so that wiring connections are easily accessible. The controller must be fitted onto the shaft
such that the base of the controller is parallel to the VAV box (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.

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3. Screw the controller onto the VAV box through the controller’s Sliding Grommet. The sliding grommet allows the controller to move back and forth
when the VAV box’s damper shaft is off center. Ensure to center the grommet along its travel range and ensure that the screw enters the VAV box at
a right angle. Using a power screwdriver with a 6” extension (Figure 7), attach the controller to the VAV box with the 1” [25mm] screw provided with
the controller (Figure 8) through the controller's sliding grommet as shown in Figure 10. Otherwise, mark the positions for the screw on the VAV box
with a punch and then drill a hole the into the VAV box. Then attach the controller to the VAV box with the 1” [25mm] screw provided with the con-
troller.
Figure7: Screwdriver Shaft Extension
90°
90°
Operational
Grommet
Travel
Range
At Installation,
Align
Grommet to
this Mark
Sliding Grommet
Figure8: Supplied Mounting Hardware – Drive the screw at a right-angle to the VAV Box
Avoid over-tightening the screw so as to not strip the threads. Make sure the screw does not pierce too far into the VAV box and interfere
with damper blade movement.
4. Find the damper position by the marking typically found on the end of the damper shaft.
Figure9: Typical Damper Shaft End Marking
5. 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° boxes or fully open the damper for 45° or 60° boxes
6. Press and hold down the Actuator Clutch for Manual Adjustment button (see Figure 3), and turn the controller’s shaft coupler until it touches the me-
chanical end-stop to either the fully closed position (90° boxes) or the fully open position (45° and 60° boxes).
7. 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° boxes.
For 45° and 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° boxes. The closed damper seal provides the fully closed
stop.
8. Tighten the U-Bolt clamp on to the damper shaft using an 5/16 in. wrench or socket. Tighten the bolts between 100 and 130 lb-in.
9. Test for free damper shaft movement: Press and hold down the Actuator Clutch For Manual Adjustment button and manually turn the actuator cou-
pling to be certain that the actuator can rotate from full closed to full open positions without binding.
10. Connect the VAV box’s flow sensor tubing to the controller’s Pressure Sensor Inputs . The connection is polarity free (high-low ports are interchange-
able). Create a condensation trap in the pneumatic tubing by forming it into a vertical loop.
11. Finalize the installation by rotating the damper to the full open position.

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Damper
Shaft
VAV Box
MillimetersInches
>40.00>1.50"
Minimum:
Sliding Grommet
Opening for
Damper Shaft
Mounting Screw
Figure10: Standard Mounting Method: Mounting a controller on a damper shaft
Power Wiring
Voltage: 24VAC/DC; ± 15%, Class 2
This is a Class 2 Product. Use a Class 2 transformer only (rated at 100VA or less at 24VAC) to power the
controller(s).
The Network Guide provides extensive information and requirements for powering a controller that uses a LONWORKS network for communications. It can
be downloaded from the Distech Controls’ Documentation and Resources Portal.
It is recommended to wire only one controller per 24VAC transformer.
When calculating a controller’s power consumption to size the 24VAC transformer, you must also add the external loads the controller is going to supply,
including the power consumption of any connected subnet module (for example, Allure™ Series Communicating Sensors).
If only one 24VAC transformer is available, determine the maximum number of daisy-chained VAVs that can be supplied on a single power cable sup-
plied by a 100 VA transformer, according to the controller’s expected power consumption including external loads, the cable’s wire gauge, and the total
cable length from the following figure. Any installation condition that is outside of the parameters of the following graph should be avoided.
To maximize daisy-chaining performance, the transformer should be installed as close as possible to the first VAV. If this is not possible, then use 14
AWG wire to power the first VAV which can help reduce a voltage drop at the end of the daisy-chain.
The recommended minimum peak input voltage is 27.2Vp

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0
1
2
3
4
5
6
7
8
9
10
100 150 200 250 300 350 400 450 500
Max VAVS in Daisy-Chain
Total Wire Length
Daisy Chain Performance
VAVS + SmartVue (AWG18)
VAVS + SmartVue (AWG16)
VAVS + SmartVue + 2DO (1,6VA each) (AWG18)
VAVS + SmartVue + 2DO (1,6VA each) (AWG16)
VAVS + SmartVue + SmartVue CO2 + 2DO (1,6VA each) (AWG18)
VAVS + SmartVue + SmartVue CO2 + 2DO (1,6VA each) (AWG16)
A
B
C
D
E
F
(30) (45) (60) (75) (90) (105) (120) (135) (150)
A
Feet
(meters)
B
C
D
E
F
Figure11: Maximum Number of VAVS Devices on a Daisy-Chain at Evenly Spaced Intervals
Laboratory testing conditions for the above graph are as follows:
£Distance between each VAV is evenly spaced along the entire wire length
£Transformer specification: 100VA (120/24VAC)
£Tested at room temperature with low voltage line conditions: 108VAC (50Hz)
Daisy-Chain Wiring
Use an external fuse on the 24VAC side (secondary side) of the transformer, as shown below, to protect all controllers against power line spikes.
Maintain consistent polarity when connecting controllers and devices to the transformer. That is, the COM terminal of each controller and each peripheral
should be connected to the same terminal on the secondary side of the transformer.
Failure to maintain consistent polarity throughout the entire network will result in a short circuit and/or damage to the
controller!
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.

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AC
Fuse: 4 A Max.
Fast Acting
24 VAC
Controller 1
24V AC
24V COM
Controller
24V AC
24V COM
2
Transformer
OPTIONAL GROUNDING:
All grounding is optional for
LON networks
Figure12: Power Wiring
Input Wiring
Before connecting a sensor to the controller, refer to the installation guide of the equipment manufacturer.
£For a wire length less than 75’ (23m), either a shielded or unshielded 18AWG wire may be used.
£For a wire up to 200’ (61m) long, a shielded 18AWG wire is recommended.
£The shield of the wire should be grounded on the controller side only and shield length should be kept as short as possible.
£COM inputs (UIx) are internally connected to 24V COM.
Table 2 shows the available universal input (UIx) wiring methods
Sensor Input Type Input Connection Diagram
£Dry Contact input.
UIx
COM
To Digital
Input
Digital Dry Contact
NO-NC
£Thermistor Input (for example, 10kΩ type II and III).
UIx
COM
To Analog-
To-Digital
Converter
RTD/
Thermistor
£Resistive input, maximum 350kΩ (for example, use with 10kΩ and 100kΩ poten-
tiometers).
UIx
COM
To Analog-
To-Digital
Converter
Potentiometer
10kΩ
£0 to 20mA input used with a 2-wire, 0 to 20mA sensor powered by an external 24
AC/DC power supply.
-
+
0-20mA
Sensor
UIx
COM
To Analog-
To-Digital
Converter
24VDC
249Ω ¼W
165Ω
£0 to 20mA input used with a 3-wire, 0 to 20mA sensor powered by an external 24
AC/DC power supply. It is recommended to supply the external power supply with
the same 24VAC as the controller.
AC
+
Common
0-20mA
Sensor
UIx
COM To Analog-
To-Digital
Converter
24VAC
249Ω ¼W
165Ω

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Sensor Input Type Input Connection Diagram
£0 to 20mA input used with a sensor powered by its own power source.
+
-
0-20mA
Sensor
UIx
COM
To Analog-
To-Digital
Converter
249Ω ¼W
165Ω
£Voltage input used with a 3-wire 0 to 10VDC sensor powered by an external 24
AC/DC power supply. It is recommended to supply the external power supply with
the same 24VAC as the controller.
AC
+
Common
0-10V
Sensor
UIx
COM To Analog-
To-Digital
Converter
24VAC
£Voltage input used with a 0 to 10VDC sensor powered by its own power source.
+
-
0-10V
Sensor
UIx
COM
To Analog-
To-Digital
Converter
Output Wiring
Before connecting an output device (actuator, relay, etc.) to the controller, refer to the datasheet and installation
guide of the equipment manufacturer.
£For a wire length less than 75’ (23m) long, either a shielded or unshielded 18AWG wire may be used.
£For a wire length up to 200’ (61m) long, a shielded 18AWG wire is recommended.
£The shield of the wire should be grounded on the controller side and the shield length should be kept as short
as possible.
£For relay outputs (DOx); select appropriately-sized wiring suitable to the current load.
£All digital outputs (DOx) are internally powered by the controller’s 24VAC power supply.
£External power cannot be applied to any digital outputs (DOx)
£Digital outputs (DOx) do not support 24VDC power input
£COM outputs (UOx) are internally connected to 24V COM.
Control Output Type Output Designation Output Connection Diagram
£Discrete 0 or 12VDC digital, Pulse, or PWM output controlling
a 12VDC relay
UOx
From
Digital
Output
12VDC Relay
A1
A2
UOx
COM
£Linear 0 to 10VDC digital to analog output. UOx
0-10V
Common
From Digital-
To-Analog
Output
UOx
COM
£0 to 10VDC voltage output controlling an analog actuator that
is powered by an external 24VAC power source.
UOx
0-10V
~ or +
From Digital-
To-Analog
Output
UOx
COM
Actuator
or -
24VAC
£24VAC internally-powered triac output controlling a relay. DOx
24 VAC Relay
A1
A2
DOx
24VAC Out
£24VAC internally-powered triac output controlling a floating ac-
tuator1.
DOx
DOx
24VAC Out
Actuator
~
DOx ~
£1 to 10VDC voltage output controlling dimmable lighting bal-
lasts that require a current sink output (pull-down).
£This output can sink up to 2.5mA.
UOx
0-10V
Common
From Digital-
To-Analog
Output
UOx
COM
Ballast
Line
VAC
Neutral
1. Maximum output current for all digital triac outputs is 0.5A continuous or 1A @ 15% duty cycle for a 10-minute period.

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Subnet Wiring
The subnet is used to connect a range of Allure Series Communicating Sensors:
£The Allure EC-Smart-Vue Series sensor is a communicating room temperature sensor with backlit display graphical menus and VAV balancing ca-
pabilities.
£The Allure EC-Smart-Comfort and Allure EC-Smart-Air Communicating Sensors are a range of communicating room temperature sensors.
Connect the Allure Series to the controller’s Subnet Port with a standard Category 5e Ethernet patch cable fitted with RJ-45 connectors. Refer to the Net-
work Guide for extensive information and requirements for the connection of the Allure Series. It contains information about network topology and length,
cable type, setting the Subnet ID, etc. It can be downloaded from the Distech Controls’ Documentation and Resources Portal. See also the Hardware In-
stallation Guide supplied with the Allure Series.
If you make your own patch cable, see the Allure Series Hardware Installation Guide.
Protect the controller’s connector from being pulled on when a cable to the Allure Series is connected. Create a
strain-relief by looping the cable and attaching it to a solid object with a nylon tie so that a tug on the cable will not
pull out the connector on the controller.
Communications Wiring
The recommended cable type for LONWORKS® communications is 22AWG (0.65 mm), twisted pair, unshielded. The LONWORKS communication wire is po-
larity insensitive and can be laid out in a bus, star, loop or free topology. For loop topology, polarity is important, special care must be taken when con-
necting the LONWORKS network to avoid short circuit.
It is recommended to use the bus topology network configuration for all LONWORKS communication wiring, as it allows
for easy network troubleshooting.
Connect both wires to the LON+ and LON‑ terminals of the controller. If inserting multiple wires in the terminals, ensure to properly twist wires together
prior to inserting them in the terminal connectors.
2
1
Front
2
LON
1
2
1
LON
2
1
Front
LON
LON
LON Network
To Next
Controller
Figure13: Communication Wiring

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2
1
2
LON
1
LON
LON Network
To Next
Controller
2
1
LON
2
1LON
Figure14: Communication Wiring
If inserting multiple wires in the terminals, ensure to properly twist wires together prior to inserting them into the terminal connectors.
For more information and detailed explanations on network topology and wire length restrictions, refer to the Network Guide, which can be downloaded
from the Distech Controls’ Documentation and Resources Portal.
Wireless Installation
When connected to a Wireless Receiver, controllers can receive input signals from a wide selection of wireless devices. Compatible wireless devices in-
clude temperature sensors, duct sensors, window/door contacts and light switches. These devices are easy to install, and can be mounted on a wide
range of building materials.
Before connecting any wireless equipment to the controller, refer to the Open-to-Wireless Application Guide.
Connecting the Wireless Receiver
The Wireless Receiver is connected to the controller using a 2m (6.5ft) telephone cable with 4P4C modular connectors at both ends. Do not exceed this
cable length. The Wireless Receiver’s telephone socket is located inside the device. To locate it, open the Wireless Receiver by separating its front and
back plates.
Figure15: Location of the Wireless Receiver’s telephone socket
Connecting to the Controller’s Wireless Port
Each controller has a wireless port in which one end of the Wireless Receiver’s telephone cable plugs in.
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 are sold as peripherals.
The terminal block cover can be clipped on to the controller as shown below.

12 / 14
Figure16: Terminal block covers
Maintenance
Unplug device before any kind of servicing.
The device requires minimal maintenance, but it is important to take note of the following:
£If it is necessary to clean the outside of the device, use a dry cloth.
Disposal
The Waste Electrical and Electronic Equipment (WEEE) Directive set out regulations for the recycling and disposal of products. The WEEE2002/96/EG
Directive applies to standalone products, for example, products that can function entirely on their own and are not a part of another system or piece of
equipment.
For this reason Distech Controls products are exempt from the WEEE Directive. Nevertheless, Distech Controls products are marked with the WEEE
symbol , indicating devices are not to be thrown away in municipal waste.
Products must be disposed of at the end of their useful life according to local regulations and the WEEE Directive.
North American Emissions Compliance
United States
Changes or modifications not expressly approved by Distech Controls could void the user's authority to operate the
equipment.
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a
residential and commercial installation. This equipment generates, uses and can radiate radio frequency energy and,
if not installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the interference by one or more of the following
measures:
£Reorient or relocate the receiving antenna.
£Increase the separation between the equipment and receiver.
£Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
£Consult the dealer or an experienced radio/TV technician for help.
Canada
This Class (B) digital apparatus meets all the requirements of the Canadian Interference-Causing Equipment Regulations.
Cet appareil numérique de la Classe (B) respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

13 / 14
Troubleshooting Guide
Controller is powered but does not turn on
Fuse has blown Disconnect the power. Check the fuse integrity. Reconnect the power.
Power supply polarity Verify that consistent polarity is maintained between all controllers and the transformer. Ensure that the 24VCOM terminal of
each controller is connected to the same terminal on the secondary side of the transformer. See Power Wiring.
Controller cannot communicate on the LONWORKS network
Absent or incorrect supply voltage 1. Check power supply voltage between 24VAC ±15% and 24VCOM pins and ensure that it is within acceptable limits.
2. Check for tripped fuse or circuit breaker.
Overloaded power transformer Verify that the transformer used is powerful enough to supply all controllers.
Network not wired properly Double check that the wire connections are correct.
Absent or incorrect network termination Check the network termination(s).
Too many Allure EC-Smart-Vue Sensors are
providing network access
Disable the Net to Subnet Port Settings jumpers on all controllers (for jumper location, see Figure 9). If communications are
re-established, re-enable only a few Allure EC-Smart-Vue sensors to have network access.
Controller communicates well over a short network, but does not communicate on large network
Network length Check that the total wire length does not exceed the specifications of the Junction Box and Wiring Guideline for Twisted Pair
LONWORKS Networks.
Wire type Check that the wire type agrees with the specification of the Junction Box and Wiring Guideline for Twisted Pair LONWORKS
Networks.
Network wiring problem Double check that the wire connections are correct.
Absent or incorrect network termination Check the network termination(s). Incorrect or broken termination(s) will make the communication integrity dependent upon
a controller’s position on the network.
Extra capacitance Make sure that no extra capacitance is being connected to the network other than the standard FTT circuit and a maximum
of a 3 meter stub (in bus topology).
Number of controllers on network segment
exceeded
The number of controllers on a channel should never exceed 64. Use a router or a repeater in accordance to the Junction
Box and Wiring Guideline for Twisted Pair LONWORKS Networks.
Network traffic Query node statistics to check for errors.
Use a LONWORKS 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.
Configuration problem Using EC-gfxProgram, check the configuration of the input. Refer to the EC-gfxProgram user guide for more 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. Consult the appropriate datasheet for the input range limits of this controller.
Open circuit or short circuit Using a voltmeter, check the voltage on the input terminal. For example, for a digital input, a short circuit shows
approximately 0V DC and an open circuit shows approximately 3.3V DC.
Hardware output is not operating correctly
Fuse has blown (Auto reset fuse) Disconnect the power and outputs terminals. Then 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 EC-gfxProgram, check the configuration of the input. Refer to the EC-gfxProgram user guide for more information.
0 to 10V output, 24VAC powered actuator is not
moving.
Check the polarity of the 24VAC power supply connected to the actuator while connected to the controller. Reverse the
24VAC wire if necessary.
Wireless devices not working correctly
Device not associated to controller Using EC- gfx Program, check the configuration of the input. Refer to the EC-gfxProgram user guide for more information.
Power discharge 1. Recharge device with light (if solar-powered) or replace battery (if battery-powered),
2. 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. For information on typical transmission ranges, refer
to the Open-to-Wireless Application Guide.
Configuration problem Using the device configuration plug-in or wizard, check the configuration of the input. Refer to the Wireless Battery-less
Sensors and Switches Solutions Guide for more information.
Flow sensor is not giving proper readings
Tubing connection problem 1. Ensure the tubing is installed properly and that the tubing is not bent.
Controller is not calibrated properly Recalibrate the controller. Refer to the controller’s user guide for more information.
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°.

14 / 14 ECL-VAVS_IG_12_EN
Controller in Override Set the Override to OFF in the wizard.
Rx/Tx LEDs
RX LED not blinking Data is not being received from the LONWORKS data bus.
TX LED not blinking Data is not being transmitted onto the LONWORKS data bus.
Status LED– Normal Operation
One fast blink Initialization: The device is starting up.
Fast blink continuous:
(150ms On, 150ms Off, continuous)
Firmware upgrade in progress. Controller operation is temporarily unavailable. The new firmware is being loaded into
memory. This 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.
Status LED blink patterns – Repeats every 2 seconds (highest priority shown first)
Long blink continuous:
(1s On, 1s Off, continuous)
The controller is not commissioned.
Appropriate action: Commission the controller.
Long Long Long blink
(800ms On, 300ms Off, 800ms On, 300ms Off,
800ms On)
The controller is offline.
Appropriate action: Set the controller Online
Long Short Short Short blink
(800ms On, 300ms Off, 150ms On, 300ms Off,
150ms On, 300ms Off, 150ms On)
The controller is in bypass mode.
Appropriate action: Set the controller Online
Short Short Long blink
(150ms On, 300ms Off, 150ms On, 300ms Off,
800 ms On)
Poor-quality power; The device has browned-out: The voltage at the 24VAC and 24VCOM terminals has gone below the
device’s acceptable limit during power up.
Fast blink 12x:
(80ms On, 80ms Off, 12x)
Wink. The wink function is used to identify a device.
For issues with the Allure EC-Smart-Vue Series Communicating Sensor, refer to the Allure EC-Smart-Vue Series Communicating Sensor Hardware In-
stallation Guide.
©, Distech Controls Inc., 2012 - 2022. All rights reserved.
Images are simulated. While all efforts have been made to verify the accuracy of information in this manual, Distech Controls is not responsible for damages or claims arising from the use of this manual.
Persons using this manual are assumed to be trained HVAC specialist / installers and are responsible for using the correct wiring procedures and maintaining safe working conditions with fail-safe environ-
ments. Distech Controls reserves the right to change, delete or add to the information in this manual at any time without notice.
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