Airstream ITA-6 User manual

REV. 02
M 890-00256 rev. 02
ITA-6
Inlet Controller
USER'S MANUAL

2ITA-6 rev.02
TABLE OF CONTENTS
PRECAUTIONS ............................................................ 3
FEATURES .................................................................. 4
LOCATION OF THE CONTROLS..................................... 5
Status Leds ........................................................................ 5
Internal Switches ................................................................. 6
INSTALLATION PROCEDURE ........................................ 7
Equipment List .................................................................... 7
Mounting Instructions ........................................................... 7
Connections ........................................................................ 7
Identification Numbers & End of Line Jumpers ......................... 10
Comlink-2 Location & Connection ......................................... 12
Identifying Primary and Slave Units ....................................... 13
Seasonal Programs ............................................................. 14
Verify ITA-6 Operation (Manual Mode) .................................. 14
ITA-6 OPERATION ..................................................... 15
Basic Principle of Operation ................................................. 15
Calibration ........................................................................ 18
CONTROLLER FUNCTIONS ......................................... 20
Identification Number ......................................................... 20
Total Opening Time ............................................................ 21
Opening Display (Time / %) .................................................. 21
Programming Inlet Openings ................................................ 22
Remaining Run Time / Opening Menu ..................................... 23
Resetting the Inlet Position .................................................. 24
Temperature Alarms .......................................................... 27
Alarms - Readout ............................................................... 29
Room Temperature ............................................................ 30
TROUBLESHOOTING GUIDE ....................................... 31
TECHNICAL SPECIFICATIONS .................................... 32
INDEX ...................................................................... 33

34
ITA-6
ITA-6 rev.02
P
Parameters
Lock / unlock parameters 6
Pilot lights 5
Primaryunit
Principle of operation 13
Settings 6
Probes
Activation 6
Extension 9
Problems
Troubleshooting guide 31
Programs (seasonal) 6
R
Reset
Activation 6
Principle of operation 24
Settings 25–26
S
Seasonal program selection
6, 14
Sensors see Probes
Serialnumber 3
Slave unit
Principle of operation 13
Settings 6
Summerprogram 6
T
Technical specifications 32
Temperature
Room temperature 30
Temperature alarms see Alarms
Temperature probe activation 6
Unit selection : °F or °C 6
Troubleshooting guide 31
Tunnel mode
Activation 6
Principle of operation 15
W
Winch see Inlet
Winter program 6
Wiring 7–9
Precautions 3
3
ITA-6 rev.02
Fuses at the input and outputs of the controller adequately pro-
tect its circuitry in the case of an overload or overvoltage. How-
ever, we recommend that you install an additional protection
device on the controller's supply circuit to prolong the life of the
controller.
The room temperature of the room in which the controller is
located MUST ALWAYS REMAIN BETWEEN 32° AND 104°F
(0° AND 40°C).
For indoor use.
To avoid exposing the controller to harmful gases or excessive
humidity, it is preferable to install it in a corridor.
DO NOT SPRAY WATER ON THE CONTROLLER
PRECAUTIONS
FOR CUSTOMER USE
Enter below the serial number located on
the side of the controller and retain this
information for future reference.
Model number:
Serial number:
ITA-6
Caution. Carefully read the following text for it contains im-
portant information which, if ignored, may cause the control-
ler to operate improperly.
Pay attention. The following text contains useful information.
SYMBOLS OF THIS MANUAL

4ITA-6 rev.02
The ITA-6 is an electronic device used for air inlet control in livestock
buildings. In combination with an environment controller, the ITA-6
coordinates the movement of the air inlets with the operation of the fans.
Additional units can be connected to the ITA-6 for an independent control
of additional air inlets.
The main features of the ITA-6 are as follows:
DIGITAL DISPLAY
A digital display shows the operation parameters and alarm messages.
PILOT LIGHTS
Pilot lights indicating the state of outputs allow you to monitor the opera-
tion of the system from a distance.
ALARM OUTPUT
The controller generates an output signal that will activate any alarm system
in the case of various operation problems.
PERMANENT MEMORY
Settings are retained in memory even in the event of a power failure.
OVERLOAD AND OVERVOLTAGE PROTECTION
Fuses located at the input and outputs of the controller protect its circuitry
in the case of an overload or overvoltage.
COMPUTER CONNECTION
A computer can be connected to the ITA-6 to centralize information man-
agement and provide monitoring and datalogging possibilities.
FEATURES
33
ITA-6 rev.02
A
Actuator see Inlet
Alarms
Conditions 29
Connection 9
Readout 29
Temperature alarms
Activation 6
Principle of operation 27
Settings 28
B
Buttons 5
C
Calibration 18–19
Celsius units 6
Comlink-2card
End of line jumpers 10
Identification numbers
Principle of operation 10
Location & connection 12
Communicationcard
see Comlink-2 card
Connections 7–9
Controller
ID number 10
Model number 3
Mounting instructions 7
Primary / slave modules
Principle of operation 13
Settings 6
Serial number 3
Setup 8
Status leds 5
Technical specifications 32
D
Dip switches 6
F
Fahrenheit units 6
I
IDnumber see Comllink-2card
Inlet
Calibration 18–19
Inlet mode
Principle of operation 15
Selection 6
Inlet reset see Reset
Limit switch position 14
Manual activation 14
Principle of operation 15–16
Programming the steps 22
Total opening time 21
Variable stage opening
Principle of operation 16
Settings 23
Inlet opening display 6
Installation 7
Setup 8
Internal switches 6
J
Jumpers see Comlink-2 card
K
Keys 5
L
Leds 5
Limit switch positionnng 14
M
Manual mode 14
Motor see Inlet
Mounting instructions 7
INDEX

32 ITA-6 rev.02
Supply: - 115/230 VAC (- 18%, + 8%), 50/60 Hz, overload and overvolt-
age protection fuse F6-1A fast blow.
- 12 VDC for AC back-up supply, can activate the inlet and alarm if sup-
plied with DC back-up voltage.
Power unit: 50/60 Hz, 30 VDC, 5A motor output, fuse F1-5A slow blow.
Alarm: ON-OFFoutput, 115/230 VAC, 50/60 Hz, 30 VDC, 3A, fuse F4-3A
slow blow.
Probes: Low voltage ( < 5V), isolated from the supply. Operating range:
-40.0° to 120.0°F(-40.0° to 49°C). Accuracy: 1.8oF (1°C) between 41o
and 95oF (5° and 35°C).
Enclosure: ABS, humidity and dust-tight.
TECHNICAL SPECIFICATIONS
The room temperature where the controller is located MUST
ALWAYS REMAIN BETWEEN 32oAND 104oF (0oAND 40oC).
For indoor use.
5
ITA-6 rev.02
LOCATION OF THE CONTROLS
Status Leds
ADJUSTMENT
KNOB
PUSH-BUTTON
STATUS LEDS
FUNCTION
SELECTOR
LED MEANING
CLOSE / OPEN Turns on when the controller opens the air inlet panel.
Flashes when the controller closes the air inlet panel.
INLET RESET Turns on when the position of the air inlet is being reset.
% / SECONDS Turns on when the value on screen is displayed in seconds.
Flashes when the value on screen is a percentage.
ADJUST OPENING Turns on when the controller waits for the user
to adjust the opening of the air inlet.
CALIBRATION Turns on when the controller is in calibration mode.
LOCKED Turns on when the parameters are locked
and cannot be modified.
°C / °F Turns on when a temperature value is displayed in Fahrenheit.
Flashes when a temperature value is displayed in Celsius.
ALARM Turns on when an alarm is detected.

6
ITA-6
ITA-6 rev.02
Internal Switches
Internal switches are located on the inside of the front cover.
#OFF ON
1UNLOCKED PARAMETERS LOCKED PARAMETERS
2FAHRENHEIT DEGREES CELSIUS DEGREES
3SUMMER PROGRAM WINTER PROGRAM
4DISABLE TEMPERATURE ALARMS ENABLE TEMPERATURE ALARMS
5NO TEMPERATURE PROBE TEMPERATURE PROBE PRESENT
6SLAVE UNIT PRIMARY UNIT
7NO RESET AUTO RESET THE INLET POSITION
8RESET MIN POSITION ONLY RESET TOWARD THE NEAREST POSITION
9STOP THE MANUAL RESET START THE MANUAL RESET
10 OPENING = TIME VALUE OPENING = %
11 INLET MODE TUNNEL MODE
12 RESERVED
31
ITA-6 rev.02
TROUBLESHOOTING GUIDE
PROBLEM
THERE IS NO
DISPLAY.
THE CIRCUIT BREAKER AT THE SERVICE PANEL IS OFF OR
TRIPPED.
THE WIRING IS INCORRECT.
THE F6 INPUT FUSE IS OPEN.
THE VOLTAGE SELECTOR SWITCH IS IN THE WRONG
POSITION.
THE DISPLAY BOARD INTERCONNECT CABLE IS UN-
PLUGGED FROM THE POWER SUPPLY BOARD.
A VARIATION IN RESISTANCE IS INDUCED ON THE
SENSOR CONNECTED TO THE ITA-6
- BE SURE THE SENSOR IS DRY AND MOVE IT AWAY
FROM DRAFTS AND FROM ANY SOURCE OF RADIANT
HEATING.
THERE IS ELECTRICAL NOISE NEAR THE CABLE OF THE
SENSOR CONNECTED TO THE ITA-6.
- DO NOT RUN THE SENSOR CABLE NEXT TO OTHER
POWER CABLES. WHEN CROSSING OTHER POWER
CABLES, CROSS AT 90°.
THE F4 ALARM FUSE IS OPEN.
THE DISPLAY BOARD INTERCONNECT CABLE IS UN-
PLUGGED FROM THE POWER SUPPLY BOARD.
THE WIRING IS INCORRECT.
THE ITA-6 ALARM IS DEFECTIVE.
THE ITA-6 IS DEFECTIVE.
- LISTEN TO SEE IF THERE IS A CLICKING SOUND WHEN
THE ALARM PILOT LIGHT TURNS ON. IF THERE IS NO
CLICKING SOUND, THE ITA-6 IS DEFECTIVE. CONTACT
YOUR DISTRIBUTOR TO REPAIR THE CONTROLLER.
THE ROOM
TEMPERATURE
DISPLAYED BY
THE ITA-6 SHOWS
SUDDEN VARIA-
TIONS.
THE ITA-6 ALARM
PILOT LIGHT IS ON
BUT THE ALARM
IS NOT ACTI-
VATED.
SOLUTION

30
ITA-6
ITA-6 rev.02
Room Temperature
This function gives a readout of the current room temperature. Minimum
and maximum temperature values can also be displayed. Internal switch
#5 must be set to ON and a temperature probe must be connected for this
function to work.
If you let the display flash for more than 10 seconds, the con-
troller resets the minimum and maximum temperature values
currently in memory. In other words, the two values are reset
to the current room temperature. To avoid resetting minimum
and maximum values, return to the current opening display
using the adjustment knob before the 10 second delay has
elapsed.
• Select "ROOM TEMPERATURE" using the function selector. The
current room temperature is displayed.
• Turn the adjustment knob clockwise once notch. The maximum
temperature value is displayed alternating with the letters "Hi".
• Turn the adjustment knob one notch further. The minimum tem-
perature value is displayed alternating with the letters "Lo".
• Turn the adjustment knob one notch further to return to the room
temperature display.
7
ITA-6 rev.02
INSTALLATION PROCEDURE
Equipment List
Integrating an air inlet control system into your ventilation system requires
the following equipment:
• A Comlink-2 communication module added to your controller
• A ITA-6 controller for each air inlet panel (up to 100 in all)
• An alarm system (optional)
• A DC power supply (optional)
• A power unit.
Mounting Instructions
Remove the four screws on the front cover and lift the cover. Mount the
enclosure on the wall using three screws. Be sure the electrical knockouts
are at the bottom of the enclosure in order to prevent water from entering
the controller. Insert the screws in the mounting holes provided in three
corners of the enclosure and tighten. Fasten the three black caps provided
with the controller onto the three mounting holes.
Connections
To connect the equipment, refer to the wiring diagrams enclosed with this
user's manual. Also refer to the DC power supply wiring diagram when
using a DC type motor.
• Use the electrical knockouts provided at the bottom of the enclo-
sure. Do not make additional holes in the enclosure.
• Set the voltage switch to the appropriate line voltage.

8
ITA-6
ITA-6 rev.02
INSTALLATION SETUP
Power
Unit
Inlet
Controller
(Slave unit)
Air inlets
Alarm
Inlet
Controller
(Primary unit)
Inlet
Controller
(Slave unit)
Inlet
Controller
(Slave unit)
Environment
Controller
Temperature
Probes
29
ITA-6
ITA-6 rev.02
Alarms - Readout
When an alarm occurs, the ITA-6 activates the alarm contact and turns on
the alarm pilot light. The alarm readout function displays all currently out-
standing alarm situations.
• Select "ALARM READOUT" using the function selector. The fol-
lowing codes can be displayed on screen:
ALARM CODE MEANING
AL1 The communication between the inlet controller and the
environment controller is disrupted.
AL2 The calibration is not valid.
AL3 the temperature probe is defective or is not connected
properly.
AL4 Low temperature alarm.
AL5 High temperature alarm.
AL6 Reception of an unprogrammed stage
NoAL There is no active alarm.

28
ITA-6
ITA-6 rev.02
ALARM SETTINGS:
• Select "ALARM LO" using the function selector. The Low Alarm
Offset flashes on the display alternating with the letters "Lo". Note
that this menu is only accessible it temperature alarms are enabled
(internal switch #4 is ON).
• Use the adjustment knob to adjust the Lo Offset to the desired
value.
• Select "ALARM HIGH" using the function selector. The High Alarm
Offset flashes on the display alternating with the letters "Hi". Note
that this menu is only accessible it temperature alarms are enabled
(internal switch #4 is ON).
• Use the adjustment knob to adjust the Hi Offset to the desired
value.
9
ITA-6
ITA-6 rev.02
ALL WIRING MUST BE DONE BY AN AUTHORIZED ELECTRI-
CIAN AND MUST COMPLY WITH APPLICABLE CODES,
LAWS AND REGULATIONS. BE SURE POWER IS OFF BE-
FORE DOING ANY WIRING TO AVOID ELECTRICAL SHOCK
AND EQUIPMENT DAMAGE.
TEMPERATURE PROBES:
If your ITA-6 unit is supplied with a temperature probe, connect it to the
PROBE terminal and set internal switch #5 to ON. Note that the ITA-6 can
run without a temperature sensor; in this case, the ROOM TEMPERATURE
menu will not be a available.
To extend the probe: This probe can be extended up to 500 ft (150 m).
• Use a shielded cable of outside diameter between 0.245 and 0.260 in
(6.22 and 6.60 mm) to ensure the cable entry is liquid-tight (the
cable dimension must not be under 18 AWG (1 mm2).
• It is preferable to solder the cable joint to ensure a proper contact
between the two cables.
•Do not ground the shielding.
CAUTION : The probes operate under low voltage and are isolated from
the power supply. Be sure the probe cable is isolated from all high voltage
sources. Do not route the probe cable and other power cables through the
same electrical knockout. Do not run the probe cable next to other power
cables. When crossing over other power cables, cross at 90°.
ALARM CONNECTION: There are two types of alarms in the industry. One
type activates when current is cut off at its input, whereas the other acti-
vates when current is supplied at its input. For an alarm of the first type,
use the NC terminal as shown on the wiring diagram. For an alarm of the
second type, use the NO terminal.

10
ITA-6
ITA-6 rev.02
Identification Numbers & End of Line Jumpers
Each Comlink-2 card used to communicate parameters between ITA-6 units
and the main controller must have a unique identification number. This
number is configured using jumpers on the card and should be assigned
before plugging the card into each unit. To do this, use the three jumpers
(marked X100, X10 and X1) on the card (i.d. numbers can go from 0 to
199). Use X1 for units, X10 for tens and X100 for hundreds. In each
case, place the black jumper horizontally over the two pins corresponding
to the digit required.
The ITA-6 network operates on two communication lines. One line links
the ITA-6 units together to the main controller and the other line links
temperature controllers to a computer (this second line is optional). Two
jumpers on the Comlink-2 card are used to identify the end of line for each
communication line. The ITA-6 communication line uses jumper JP5 and
the computer line uses JP4. Use pins 2 and 3 for YES and pins 1 and 2 for
NO. The following diagram shows a typical connection with the appropri-
ate jumper configurations.
END OF LINE
JUMPERS
ID JUMPERS
27
ITA-6
ITA-6 rev.02
Temperature Alarms
Low Temperature Alarm:
The alarm contact is activated when the room temperature drops below
"temperature set point- low alarm offset" as shown below. The Lo Offset
is the temperature difference from the set point below which a low tem-
perature alarm is set off. It can be adjusted from 0.5°F to 20°F (0.3°C to
11.1°C). Note that internal switch #4 must be set to ON for this alarm to
be detected.
High Temperature Alarm:
The alarm contact is activated when the room temperature exceeds "tem-
perature set point + high alarm offset" as shown below. The Hi Offset is
the temperature difference from the set point above which a high tem-
perature alarm is set off. It can be adjusted from 0.5°F to 40°F (0.3°C to
22.2°C). Note that internal switch #4 must be set to ON for this alarm to
be detected.
SET POINT
HI OFFSETLO OFFSET
TEMPERATURE
TIME
HI TEMPERATURE
ALARM
LO TEMPERATURE
ALARM

26
ITA-6
ITA-6 rev.02
AUTO-RESET SETTINGS:
The following procedure shows how to specify the frequency at which
automatic resets are performed (once every #x days). First, make sure the
auto-reset function is enabled (internal switch #7 is ON).
• Select "AUTO RESET SETTINGS" using the function selector. If
the auto-reset function is enabled (internal switch #7 is ON), the
frequency at which auto-resets are performed is displayed, alter-
nating with the letters "PEr".
• Use the adjustment knob to set the frequency to the desired value.
The frequency can be adjusted once every 1 to 7 days. Select "1"
to reset the position every day; select "2" to reset the position
every 2 days, etc.
11
ITA-6
ITA-6 rev.02
INLET
CONTROLLER
(MASTER)
INLET
CONTROLLER
(SLAVE)
INLET
CONTROLLER
(SLAVE)
MAIN
ENVIRONMENT
CONTROLLER
ADDITIONAL
CONTROLLER
ADDITIONAL
CONTROLLER

12
ITA-6
ITA-6 rev.02
Comlink-2 Location & Connection
a. Unplug each unit.
b. Plug the communication card in the unit.
Open the cover. Drill a 5/16" hole through the bottom of the controller and
thread the communication cable through the hole. Use the grommet pro-
vided to secure the cable. Connect the cable to the terminals of the com-
munication card as shown below. When connecting two cable ends to-
gether, solder the joint and use a heat shrink to ensure a proper contact.
Line-up the comlink card with the con-
nector and insert it in the upright posi-
tion (see illustration beside). For com-
munication, always use a 1 twisted pair
shielded cable. The maximum length of
the cable is 10 000 ft (3 000 m) and
the recommended wire diameter is of
18 AWG (1.0 mm2). Use a lightning pro-
tection module when running the cable
between buildings.
COMLINK-2 CARD
25
ITA-6
ITA-6 rev.02
Adjust the Reset Delay:
This is the delay that is required to fully open / close the inlet panel in order
to reset the inlet position. The reset delay of an inlet must be greater than
its total opening time. This ensures the inlet panel to be completely opened
or closed while its position is being reset.
The Reset Delay can be adjusted from 60 to 900 seconds in increments of
15 seconds.
• Select "AUTO RESET SETTINGS" using the function selector. The
letters "dEL" flash on screen; if they are not displayed, press the
push-button once to select this parameter.
• Use the adjustment knob to set the reset delay "dEL" to the de-
sired value.
• Proceed in similar fashion to set the reset delay on all
ITA-6 units.
Manual & Automatic Resets
The reset of an inlet can either be performed manually (which is useful
when the user detects an offset in the inlet position) and/or it can be per-
formed at regular intervals (auto-reset).
Manual Reset:
To perform a manual reset, switch internal switch #9
from OFF to ON.
Automatic Reset:
Set internal switch #7 to ON to enable the auto-
reset function then program the auto-reset settings
as explained in the following section.
ON
OFF

ON
OFF


24
ITA-6
ITA-6 rev.02
Resetting the Inlet Position
Resetting the actuator’s position allows clearing all accumulated time off-
sets caused by the frequent openings and closings of the inlet. It is highly
suggested to reset inlet positions frequently to make sure they are always
accurate.
Choose a Resetting Method:
The inlet reset can be done two different ways:
1. Reset the minimum position only:
The inlet closes during the Reset Time Delay each time a reset is
performed. Once the inlet position is reset, the inlet returns to its
previous position. Set internal switch #8 to OFF to use this reset
method.
2. Reset toward the nearest position:
Each time a reset starts, the inlet panel is directed
towards the closest position from its current open-
ing: it then opens or closes during the Reset Time
Delay. Once the reset is completed, the inlet returns
to its previous position. This function prevents clos-
ing the air inlet when the room temperature already
asks for a large opening of the panel. Set internal
switch #8 to ON to use this reset method.
This resetting method requires the pres-
ence of limit switches at both ends of
the actuator.
ON
OFF
ON
OFF
value is displayed when the inlet is closing. The letters "StP" are displayed
if the inlet is not moving.
If the inlet opening is displayed as a percentage, the REMAINING RUN
TIME / OPENING menu shows the current opening (in %) of the air inlet.
13
ITA-6
ITA-6 rev.02
Be sure the communication cable is isolated from all high
voltage sources and fluorescent lights. Do not route the
communication cable and power cables through the same
electrical knockout. Do not run the communication cable next
to power cables. When crossing power cables, cross at 90°.
DO NOT GROUND THE SHIELD WIRE!
DISCONNECT THE POWER SOURCE BEFORE
CONNECTING THE COMMUNICATION CABLE.
Identifying Primary and Slave Units
If your installation requires more than one ITA-6 unit for independent con-
trol of different air inlets, one of the ITA-6 will be configured as the primary
unit and the others will be configured as slaves. Up to 99 slave units can be
connected in this way. When programming the ITA-6, the slave units take
their reference temperature from the primary unit. By default, all units are
set as PRIMARY units.
• Set internal switch #6 to ON for the primary unit or set
it to OFF for a slave unit. If only one ITA-6 unit is used,
set internal switch #6 to ON.
ON
OFF


14
ITA-6
ITA-6 rev.02
Seasonal Programs
All controller parameters can be set separately for winter and for summer
seasons. Select the proper season using internal switch #3 :
ON = Winter
OFF = Summer
Make sure to select the right season
is selected before modifying a parameter.
Verify ITA-6 Operation (Manual Mode)
• Power the ITA-6 then select MANUAL MODE using the function
selector.
• Use the adjustment knob to select the desired actuator status: se-
lect "OPn" to open, "CLo" to close or "OFF" to stop the actuator.
Select "AUt" to return to the automatic control mode.
VERIFY THE MOTOR'S OPERATION:
• Manually open or close air inlet panels as explained above. These
panels should open when the "OPn" option is selected and should
close when the "CLo" option is selected. If they move the opposite
way, the motor operates in the wrong direction. Turn off the power
and reverse the wires connected to the actuator's open and close
terminals. Verify that the motor now operates in the right direction.
VERIFY LIMIT POSITIONS OF AIR INLET PANELS:
• Select "CLo" to fully close the air inlet then place the limit switch
of the actuator at this position to prevent it from closing any fur-
ther; select "OPn" to fully open the air inlet then place a limit switch
at this position to prevent the actuator from opening any further.
ON
OFF

23
ITA-6
ITA-6 rev.02
• Use the adjustment knob to specify the opening time that needs to
be added to the previous opening, or to specify the inlet opening (in
%) associated with the selected step.
• Proceed in similar fashion for all steps.
The cumulative opening times of an air inlet cannot exceed
the inlet's Total Opening Time parameter value.
If the opening of the air inlet is set as a percentage, the
controller may have to slightly adjust inlet opening values
due to some internal restriction in the conversion process.
SELECTING THE NUMBER OF INTERMEDIATE OPENING STEPS
Follow this procedure to select the number intermediate opening steps
that are performed during variable stages (see BASIC PRINCIPLE OF
OPERATION chapter for further information).
• Select "REMAINING RUN TIME / OPENING" using the function se-
lector.
• Press and hold the push-button for 2 seconds. The number of inter-
mediate steps flashes, alternating with the letters "NbS".
• Use the adjustment knob to set the number of intermediate steps
to the desired value. This value ranges from 0 to 2 steps.
Remaining Run Time / Opening Menu
If the inlet opening is displayed as a time value (internal switch #10 is OFF),
the REMAINING RUN TIME / OPENING menu shows a countdown of the
remaining moving time of the air inlet (opening or closing time). A negative

22
ITA-6
ITA-6 rev.02
Programming Inlet Openings
Once the calibration is completed, you must assign an inlet position to each
ventilation stage of the environment controller. This position can either be
specified as a moving time of the actuator or as a percentage of the total run
time, depending on the chosen option (see OPENING DISPLAY chapter).
BEFORE PROGRAMMING INLET OPENINGS
• Install a static pressure measuring device or determine in advance
the position required at each reference point by calculating, ac-
cording to the fan airflow, the opening that will maintain the de-
sired air speed at the inlet.
• Enter the total opening time of the inlet of each ITA-6 unit.
PROGRAMMING INLET OPENINGS
• Select "PROGRAMMING" using the function selector (note that
this menu is not available during the calibration) The opening time
or the inlet position (in %) associated with step 0 is displayed. Mov-
ing times are displayed as follows:
- A negative time value signals a closing time;
- A positive time value signals an opening time;
- The word "Off" means that the inlet completely closes once
the temperature controller reaches the selected step.
• Use the adjustment knob to specify the opening time or the inlet
position (%) associated with step 0 (if required).
• Press the push-button to select the next step.
15
ITA-6 rev.02
ITA-6 OPERATION
Basic Principle of Operation
The ITA-6 operates in combination with an environment controller. It ad-
justs the opening of the air inlet according to the ventilation level provided
by the environment controller. As the temperature increases and new stages
are activated, the inlet is opened or closed accordingly. The user must
associate a moving time or an opening percentage with each ventilation
step (stage) of the environment controller.
The opening time (or %) of Step 0 defines the initial position of the air inlet
and corresponds to a room temperature of 0.4°F (0.2°C) below the
controller's temperature set point (i.e., when the controller is in minimum
ventilation).
INLET OPENING
(in seconds or
% of the Total
Opening Time)
TOTAL
OPENING TIME
CLOSED
STEP 0 Stage 1
starts
ROOM
TEMP.
SET POINT
0.4 °F
Bandwidth Offset
Stage 2
starts
STEP 1
HI
STEP 2
Stage 3
starts
STEP 1
STEP 0
STEP 3
Opening of the Air Inlet
based on Ventilation Stages
Inlet & Tunnel Modes
When the last reference point is reached, the ITA-6 can either open the air
inlet according to a user-defined value (internal switch #11 to OFF), or it
can fully open the air inlet up until the inlet reaches its limit switch (internal
switch #11 to ON).

16
ITA-6
ITA-6 rev.02
Opening of the Air Inlet During Variable Stages
A step is also added when a variable stage starts increasing in speed, right
after the stage's differential. This step is called “ Step x Hi ”. The step
number is not increased as we are dealing with the same ventilation stage.
In the previous graph, Step 1 corresponds to the activation of Stage 1 and
Step 1 Hi represents the moment where Stage 1 fans reach their full speed.
You must thus associate an inlet opening with the beginning and with the
end of each ventilation stage (in time or %) and then enable the desired
number of intermediate steps (intermediate steps are used to open the
inlet progressively during a variable fan stage).
Intermediate steps: When intermediate steps are enabled, the control-
ler splits up the variable stage's opening time or % evenly between the
number of intermediate steps (e.g., if one intermediate step is en-
abled, the controller will open the inlet twice during the variable stage
(50% of the stage's opening time (or %) at the first intermediary step
and 50% at the end of the variable stage).
Intermediate steps are activated when the variable stage reaches pre-
defined fan speeds. These fan speeds are set differently depending on
the number of intermediate steps in use. For example, if 1 intermedi-
ate step is enabled, the inlet opens during half the variable stage's
opening when the stage's speed is of 75 %; it reaches the stage's HI
opening position when the fan speed is 100 %.
100 %
Step
Opening
Step HI
Opening
Opening
(Time or %)
Variable
Stage
Speed
50
%
Opening of the Inlet
During a Variable Stage
with 0 Intermediate Step
21
ITA-6
ITA-6 rev.02
Total Opening Time
You must specify the exact time that is required for the actuator to reach
its maximum limit switch. The opening of the actuator will then be limited
by this opening time.
Set this parameter before
calibrating the inlets.
• Select "TOTAL OPENING TIME" using the function selector. The
time that is required to fully open the air inlet is displayed (in sec-
onds).
• Use the adjustment knob to set the total opening time to the de-
sired value.
• Proceed in similar fashion to set the total opening time on all
ITA-6 units.
Opening Display (Time / %)
The user must assign an inlet position to each ventilation stage. This posi-
tion can either be specified as a moving time of the actuator or as a per-
centage of the total run time. When the percentage method is used, the
controller converts the inlet's moving times into a percentage based on the
total run time of the inlet.
Choose the desired opening display method:
• Time value: internal switch #10 is OFF
• % internal switch #10 is ON.
Note that displaying the opening as a time value gives
a little more precision than the percentage display.
ON
OFF
10

20 ITA-6 rev.02
CONTROLLER FUNCTIONS
Identification Number
The IDENTIFICATION NUMBER menu gives the identification number of
the ITA-6 along with its primary/slave status. The ID number is set using
jumpers on the COMLINK-2 communication card (see INSTALLATION PRO-
CEDURE chapter).
To display the identification number:
• Select "IDENTIFICATION NUMBER" using the function selector.
The identification number is displayed, alternating with "ID" and
the letters "PRI" or "SLA" for a primary or slave unit.
17
ITA-6
ITA-6 rev.02
Refer to the PROGRAMMING chapter to enable the
proper number of intermediate opening steps.
100 %
Opening
(Time or %)
Variable
Stage
Speed
50 %
1/2
1/2
75 %
(interm.
step 1)
Intermediary
Step 1
Openin
g
of the Inlet
Durin
g
a Variable Sta
g
e
with 1
Intermediate Step
Step
Opening
Step HI
Opening
100 %
Opening
(Time or %)
Variable
Stage
Speed
50 %
1/3
1/3
1/3
60 %
(interm.
step1)
85 %
(interm.
step2
Intermediary
Step 1
Openin
g
of the Inlet
Durin
g
a Variable Sta
g
e
with 2
Intermediate Steps
Step
Opening
Step HI
Opening
Intermediary
Step 2

18
ITA-6
ITA-6 rev.02
Calibration
The ITA-6 adjusts the opening of air inlets according to the ventilation
stages provided by the environment controller. The calibration allows
ITA-6 units to detect how many On/Off and variable stages the environ-
ment controller uses.
When the calibration is launched on the PRIMARY ITA-6 unit, the environ-
ment controller enters in test mode and starts simulating the room tem-
perature. The controller increases the simulated room temperature in or-
der to activate all of its ventilation stages. Each time a stage is activated,
a reference point is added to the ITA-6.
BEFORE CALIBRATING THE ITA-6:
• It is preferable to calibrate the ITA-6 while the room is empty be-
cause the calibration will cause the activation of all fan stages.
• Be sure that the circuit breakers at the service panel and all other
protection devices are in a position such that the fans can be acti-
vated.
• Select the season you want to program with internal switch #3.
19
ITA-6
ITA-6 rev.02
CALIBRATION SETTINGS:
1. Select CALIBRATION using the function selector.
2. Press and hold the push-button of the primary ITA-6 unit for 2 sec-
onds to start the calibration.
3. Once the calibration is launched, you must press and hold the push-
button for 2 seconds on all ITA-6 slave units within the next 30 sec-
onds.
4. After 30 seconds, the environment controller enters in test mode
and starts simulating the room temperature. The simulated room
temperature gradually increases for ITA-6 units to detect the num-
ber of On/Off and variable ventilation stages in use.
5. After the environment controller has reached the start tempera-
ture of its last ventilation stage, press and hold the push-button of
the PRIMARY ITA-6 unit for 2 seconds to end the calibration. You
can also wait for the environment controller to reach 120°F (49°C)
– the calibration will automatically end at that moment. One refer-
ence point per ventilation stage will then be added to each cali-
brated ITA-6.
6. Refer to the programming chapter to assign an inlet opening to
each reference point.

18
ITA-6
ITA-6 rev.02
Calibration
The ITA-6 adjusts the opening of air inlets according to the ventilation
stages provided by the environment controller. The calibration allows
ITA-6 units to detect how many On/Off and variable stages the environ-
ment controller uses.
When the calibration is launched on the PRIMARY ITA-6 unit, the environ-
ment controller enters in test mode and starts simulating the room tem-
perature. The controller increases the simulated room temperature in or-
der to activate all of its ventilation stages. Each time a stage is activated,
a reference point is added to the ITA-6.
BEFORE CALIBRATING THE ITA-6:
• It is preferable to calibrate the ITA-6 while the room is empty be-
cause the calibration will cause the activation of all fan stages.
• Be sure that the circuit breakers at the service panel and all other
protection devices are in a position such that the fans can be acti-
vated.
• Select the season you want to program with internal switch #3.
19
ITA-6
ITA-6 rev.02
CALIBRATION SETTINGS:
1. Select CALIBRATION using the function selector.
2. Press and hold the push-button of the primary ITA-6 unit for 2 sec-
onds to start the calibration.
3. Once the calibration is launched, you must press and hold the push-
button for 2 seconds on all ITA-6 slave units within the next 30 sec-
onds.
4. After 30 seconds, the environment controller enters in test mode
and starts simulating the room temperature. The simulated room
temperature gradually increases for ITA-6 units to detect the num-
ber of On/Off and variable ventilation stages in use.
5. After the environment controller has reached the start tempera-
ture of its last ventilation stage, press and hold the push-button of
the PRIMARY ITA-6 unit for 2 seconds to end the calibration. You
can also wait for the environment controller to reach 120°F (49°C)
– the calibration will automatically end at that moment. One refer-
ence point per ventilation stage will then be added to each cali-
brated ITA-6.
6. Refer to the programming chapter to assign an inlet opening to
each reference point.

20 ITA-6 rev.02
CONTROLLER FUNCTIONS
Identification Number
The IDENTIFICATION NUMBER menu gives the identification number of
the ITA-6 along with its primary/slave status. The ID number is set using
jumpers on the COMLINK-2 communication card (see INSTALLATION PRO-
CEDURE chapter).
To display the identification number:
• Select "IDENTIFICATION NUMBER" using the function selector.
The identification number is displayed, alternating with "ID" and
the letters "PRI" or "SLA" for a primary or slave unit.
17
ITA-6
ITA-6 rev.02
Refer to the PROGRAMMING chapter to enable the
proper number of intermediate opening steps.
100 %
Opening
(Time or %)
Variable
Stage
Speed
50 %
1/2
1/2
75 %
(interm.
step 1)
Intermediary
Step 1
Openin
g
of the Inlet
Durin
g
a Variable Sta
g
e
with 1
Intermediate Step
Step
Opening
Step HI
Opening
100 %
Opening
(Time or %)
Variable
Stage
Speed
50 %
1/3
1/3
1/3
60 %
(interm.
step1)
85 %
(interm.
step2
Intermediary
Step 1
Openin
g
of the Inlet
Durin
g
a Variable Sta
g
e
with 2
Intermediate Steps
Step
Opening
Step HI
Opening
Intermediary
Step 2