CIAT AirCompact Control Use and maintenance manual

NA 13.12 B
03 – 2015
AirCompact Control
AirCompact
Control manual

2
CONTENTS
1
Supervision and control ......................................................................................................................4
1.1 The program................................................................................................................................................... 4
1.2 The HMI terminal........................................................................................................................................... 4
1.2.1 Using the HMI terminal keys ..................................................................................................................................5
1.3 The room terminal (Option) ....................................................................................................................... 6
1.3.1 Controls.....................................................................................................................................................................6
1.3.2 Displays.....................................................................................................................................................................7
1.3.3 Room terminal information, settings and browsing.............................................................................................8
1.3.4 Managing alarms......................................................................................................................................................8
1.3.5 Electrical connections............................................................................................................................................10
1.4 The controller.............................................................................................................................................. 11
1.5 Description of the air handling units..................................................................................................... 11
1.6 Functional analysis of the control......................................................................................................... 12
1.6.1 Management of on and off modes.......................................................................................................................12
1.6.2 Safety and insulating damper...............................................................................................................................12
1.6.3 Antifreeze thermostat............................................................................................................................................12
1.6.4 Fire fault...................................................................................................................................................................12
1.6.5 Fan motors..............................................................................................................................................................13
1.6.6 Filtration...................................................................................................................................................................13
1.6.7 Temperature control..............................................................................................................................................14
1.6.8 Plate recovery.........................................................................................................................................................17
1.6.9 Electric heater.........................................................................................................................................................17
1.6.10 Free cooling........................................................................................................................................................18
1.6.11 Humidifier............................................................................................................................................................18
1.6.12 CO2air quality.....................................................................................................................................................18
1.6.13 Night cooling.......................................................................................................................................................19
1.6.14 The fault relays...................................................................................................................................................19
1.7 Controller inputs and outputs................................................................................................................. 20
1.7.1 Analogue inputs .....................................................................................................................................................20
1.7.2 Digital inputs ...........................................................................................................................................................20
1.7.3 Analogue outputs...................................................................................................................................................20
1.7.4 Digital outputs.........................................................................................................................................................20
2
Overview of the HMI module screens ............................................................................................22
2.1 Esc button.................................................................................................................................................... 22
2.1.1 Access level selection menu................................................................................................................................23
2.2 Setpoint menu............................................................................................................................................. 23
2.3 Machine parameters menu....................................................................................................................... 25
2.4 Adjustment parameters menu................................................................................................................. 28
2.5 Read-only parameters menu................................................................................................................... 31
2.5.1 Inputs.......................................................................................................................................................................31
2.5.2 Outputs....................................................................................................................................................................32
2.5.3 Calculated setpoints..............................................................................................................................................33
2.5.4 Counters..................................................................................................................................................................33
2.6 Fault memory menu................................................................................................................................... 34

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2.7 Versions menu.............................................................................................................................................35
2.8 Time schedule menu..................................................................................................................................35
2.9 Communication menu................................................................................................................................37
2.10 Alarms menu.............................................................................................................................................37
2.11 Test mode menu......................................................................................................................................37
2.12 Access level menu..................................................................................................................................39
2.13 Master/Slave menu..................................................................................................................................40
3
Managing a network of controllers.................................................................................................40
3.1 pLAN electrical connections....................................................................................................................40
3.1.1 Connecting controllers to the pLAN.....................................................................................................................40
3.1.2 Connecting a remote screen to the pLAN ..........................................................................................................41
3.2 Addressing the pLAN.................................................................................................................................42
3.3 Changing the controller address............................................................................................................42
3.3.1 Addressing the HMI terminals..............................................................................................................................42
3.3.2 Assigning private and shared terminals..............................................................................................................43
3.3.3 Checking the pLAN address.................................................................................................................................44
3.4 State of the pLAN........................................................................................................................................44
4
Replacing the lithium battery...........................................................................................................44
5
Supervision...........................................................................................................................................44
5.1 CMS.................................................................................................................................................................44
5.2 The datapoint database.............................................................................................................................45
5.3 Modbus..........................................................................................................................................................45
5.3.1 Modbus RTU connection diagram.......................................................................................................................45
5.3.2 RS485 connection close-up..................................................................................................................................45
5.3.3 Modbus TCP connection.......................................................................................................................................46
5.3.4 Variables..................................................................................................................................................................47
5.3.4.1 Commands.....................................................................................................................................................47
5.3.4.2 Setpoints........................................................................................................................................................47
5.3.4.3 Reading parameters....................................................................................................................................49
5.3.4.4 Alarms.............................................................................................................................................................51
5.4 LON.................................................................................................................................................................52
5.4.1 LON scope of supply .............................................................................................................................................52
5.4.2 The digital datapoints.............................................................................................................................................52
5.4.3 The analogue datapoints.......................................................................................................................................54
5.5 KNX.................................................................................................................................................................55
5.5.1 Description of KNX communication card............................................................................................................55
5.5.2 Variables..................................................................................................................................................................56
5.5.3 Configuration process............................................................................................................................................62
5.5.4 CAREL plugin .........................................................................................................................................................62
5.5.5 Installing the plugin................................................................................................................................................62
5.5.6 Assigning the physical address............................................................................................................................64
5.5.7 Downloading the XML file.....................................................................................................................................65
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Table of alarms.....................................................................................................................................66

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1Supervision and control
1.1 The program
This air handling unit is managed by its controller. In addition to its control functions, it also monitors and detects any faults with the
air handling unit.
The HMI terminal displays the following data which can be edited at any time:
. values of connected sensors
. unit on/off cycles
. calibration of the sensors
. detection of alarms and log of the last 100
. the password-protected configuration and operating parameters
. device running times and time delays
. management of time programs (4 daily, 4 weekly and 4 yearly programs)
. language selection (French)
The connection with the pLAN network allows the program to use a terminal mounted on the front of the AHU and/or a wall-
mounted terminal installed in the room to be air conditioned.
IMPORTANT: To avoid any problems, the password must be known only by qualified personnel.
1.2 The HMI terminal
The terminal provided is equipped with a remote LCD display (8 lines x 22 columns) on the outside of the unit, which has 6 keys
(connected with a phone cable, max length 50m). It allows all of the program operations to be carried out. The terminal displays the
unit's operating conditions at any point in time and allows the parameters to be modified; in addition, it can be disconnected from
the main board as its presence is not strictly required.

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1.2.1 Using the HMI terminal keys
Key
Description
Returns to the main Menu mask when pressed in any loop.
The Menu loop displays the state of the unit.
Provides access to the "Menu"
Resets all setpoints, parameters and time delay values to their factory settings.
The red button is used to display alarms and confirm acknowledgeable faults. It lights up
when an alarm is triggered.
The button has two functions:
1. used to manage the masks on the display (next mask)
2. used to adjust the values of the monitoring parameters (decrease)
The button has two functions:
1. used to manage the masks on the display (previous mask)
2. used to adjust the values of the monitoring parameters (increase)
Turns the unit on and off.
The

button is used to confirm changes. It is continuously backlit to indicate when the power is
on.

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1.3 The room terminal (Option)
The terminal supplied is equipped with a digital display, 4 buttons and a rotary encoder.
Once installed in the premises, the device can measure the room temperature and enables remote control of the air handling unit.
1.3.1 Controls
1. Button not used
2. A short press will activate or deactivate operation in timed
zones if the time slot option has been authorised.
Press and hold (2 s) to access the timer and timed zones
setting menu.
3. Button for changing the ventilation speed
4. Button for switching the unit on or off (press and hold for 2s)
5. Encoder:
- Press to access the setpoints and confirm
- Turn to browse between menus and modify the parameters
1
2
3
4
5

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1.3.2 Displays
1. Unit operating mode
2. Main display area (Big area)
3. Ventilation operating mode
4. Ventilation operating speed
5. Temperature unit
6. Indicates whether the value displayed in the main area is a setpoint
7. Indicates whether the value displayed in the main area is a humidity
8. Indicates the active time slot zone
9. Day of the week
10. Operating icons
11. Secondary display area (Small area)
12. Run time range mode
Details:
1. Unit operating mode
- : Unit in heating mode
- : Unit in cooling mode
2. Main display area
- Displays "OFF" when the unit is switched off manually via the room terminal
- Displays the ambient temperature
- Displays the temperature setpoint when the encoder is turned
- Displays the various menus during browsing
- Displays the various setting parameters
3. Ventilation operating mode
- : Indicates that the ventilation is active and in setpoint-based flow or Supply air duct pressure mode.
- : Indicates that the ventilation is in automatic mode based on the regulated temperature.
- No display: the unit has been switched off by the HMI terminal, by a major fault or to Standby by a time program.
4. Ventilation operating speed
- : The ventilation is operating at reduced flow or Eco Supply air duct pressure
- : The ventilation is operating at a nominal flow rate or Comfort Supply air duct pressure
5. Temperature unit
- °C: temperature expressed in degrees Celsius
- °F: temperature expressed in degrees Fahrenheit (not used)
6. Indicates whether the value displayed in the main area is a setpoint
After the encoder has been turned and then pressed, it is possible to modify the temperature setpoint characterised by the
indicator .
7. Area not used
8. Area not used
9. Area not used
10. Operating icons
Only the bell is used. It indicates the presence of a fault. This icon is inhibited when the faults are cleared via the HMI
terminal.
11. Secondary display area
Displays the time on the controller. This area can also be used for modifying the controller time.
12. Run time range mode

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1.3.3 Room terminal information, settings and browsing
The diagram below shows the various browsing, information and setting options on the room terminal:
Terminal energising
A few seconds (2-3s)
Terminal initialising
A few seconds (2-3s)
Unit off
pressed
pressed
Unit on
(default
screen)
Communication fault
with the controller or
terminal presence not
validated in the controller

pressed and held
Encoder turned and pressed
Clock
modification
To modify and validate
the temperature setpoint.
Returns to the default
screen after a few
seconds.
Encoder turned
Not used
Encoder turned
Exits the alarm menu when
the encoder is pressed.
1.3.4 Managing alarms
When an alarm appears, it is accompanied by an acronym on the screen:
u1.3
Cn

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To find out the reference for the alarm, simply press the and "mode" buttons for 3s:
To find out whether there is more than one active alarm, turn the encoder to access the full list.
List of alarms:
Messages
Room terminal
Messages
HMI terminal
AL01
Supply air motor
AL02
Return air motor
AL03
Supply air filter CF1 dirty
AL04
Supply air filter CF1 clogged
AL05
Return air filter CF1 dirty
AL06
Return air filter CF1 clogged
AL07
Filter CF2 dirty
AL08
Humidifier
AL09
Heat exchanger frosted
AL10
Antifreeze thermostat
AL11
Electric heater safety thermostat
AL12
Supply air temperature too low
AL13
Supply air temperature too high
AL14
Regulated temperature too low
AL15
Regulated temperature too high
AL16
Supply air duct pressure sensor
AL17
Replace the controller battery
AL18
Fire
The disappearance of an alarm is always confirmed via the HMI terminal.

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1.3.5 Electrical connections
Rx- Rx+
GND
L N
24VAC
The room terminal and the controller are electrically connected using an AWG20/22 shielded cable (not supplied by CIAT)
comprising two twisted pairs.
The first and last controller must be no more than 500m apart. This network must never run parallel to power cables at a distance
of less than 50 cm. These cables may cross, but perpendicularly. You are requested not to form a loop with the network cable or
the earth braid, and to properly separate the various cable families (control, power, earth and communication bus).
In case of transmission problems, it is vital to connect a 120Ω ¼W electrical resistor between terminals TX+ and TX- of the room
terminal, as indicated in the manual supplied with the room terminal.