CIAT FLOWAY CLASSIC RHE Manual
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CIAT FLOWAY CLASSIC RHE Manual

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EN7565703-02
01 - 2021
C o n t r o l
m a n u a l
Compact AHU Control 2 V1

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Summary of Contents for CIAT FLOWAY CLASSIC RHE

  • Page 1 EN7565703-02 01 - 2021 C o n t r o l m a n u a l Compact AHU Control 2 V1...
  • Page 2 The illustrations in this document are for illustrative purposes only and not part of any offer for sale or contract. The manufacturer reserves the right to change the design at any time without notice. FLOWAY EN-2...

  • Page 3: Table Of Contents

    CONTENTS 1 - PREAMBLE ..................................... 4 2 - REGULATING CONTROLLER ..............................5 2.1 - Introduction..................................5 2.2 - Inputs/outputs ..................................5 2.3 - Alphanumeric terminal ................................. 8 2.4 - Touchscreen terminal ................................ 10 3 - FEATURES .................................... 16 3.1 - Management of on and off modes ............................. 16 3.2 - Managing setpoints ................................

  • Page 4: Preamble

    1 - PREAMBLE This air handling unit is managed by its PLC. In addition to its control functions, it also monitors and detects any faults with the air handling unit. An HMI terminal associated with the PLC is used to view and modify the following parameters: - Values of connected sensors - Unit on/off cycles - Calibration of the sensors...

  • Page 5: Regulating Controller

    2 - REGULATING CONTROLLER 2.1 - Introduction The control PLC is used to control and monitor the operating status of the various components of the air handling unit. Depending on the options, it controls the temperature, manages the fans, monitors filter fouling and the air quality level. It can be connected to a CMS so that it can be controlled remotely.
  • Page 6 2 - THE CONTROL PLC Connector Input Type Description +24 Vac power supply Shared 0-10V Supply air duct pressure sensor or air quality measurement sensor Temperature sensor (see assignment table below) Temperature sensor (see assignment table below) Shared Temperature sensor (see assignment table below) Supply air temperature sensor in the additional casing +Vdc Power supply to unit internal pressure sensors...
  • Page 7 2 - THE CONTROL PLC Connector Input Type Description On/off AHU operating feedback Shared On/off Danger fault summary relay Shared On/off Maintenance faults summary relay Shared DI7H Not used On/off Air intake fan control DI7C Shared On/off Extraction fan control DI8H Not used 0-10V...

  • Page 8: Alphanumeric Terminal

    2 - THE CONTROL PLC 2.3 - Alphanumeric terminal The terminal is supplied equipped with an alphanumeric screen (8 lines x 22 characters) and 6 keys. It is connected to connector J15 on the PLC via a telephone cable. It is used to modify the programme parameters and view the machine state. 2.3.1 - Machine status The terminal is used to view the machine state.
  • Page 9 2 - THE CONTROL PLC Control active Indicates the operating status Operating status Description Damper opening The isolation damper is in the process of opening Ventilation start-up The ventilation is in the process of starting up Control active The control functions are active Control limited Certain control functions are not authorised (e.g.: flow rate insufficient for operation of the electric heater) Fan delay...

  • Page 10: Touchscreen Terminal

    2 - THE CONTROL PLC 2.3.3 - Buttons The 6 keys on the interface are used to change the parameters, acknowledge faults, and switch the unit on or off. The operation of these keys is described below. Button Description Used to go up one level in the menu tree and access the machine status menu from the general menu This button is used to view the faults on the display and indicates the presence of a fault: Acknowledgement of a fault.
  • Page 11 2 - THE CONTROL PLC • Return air 21.4°C Indicates the controlled temperature value (supply, return or room air) • Intake 10,000 m /h 120 Pa: indicates the flow rate or pressure value measured at the intake • Exhaust 11,500 m /h 150 Pa: indicates the flow rate or pressure value measured at the exhaust •...
  • Page 12 2 - THE CONTROL PLC 2.4.3 - Menus Main menu Main menu Sub-menu 1 Sub-menu 2 Access level Information Login Setpoints 1 Setpoints 2 Setpoints Setpoint change Setpoint compensation Night cooling Weekly 1 Weekly 2 Weekly 3 Weekly 4 Weekly 5 Weekly 6 Time program Annual 1...
  • Page 13 2 - THE CONTROL PLC Main menu Sub-menu 1 Sub-menu 2 Access level Language Date and time Fan management Fan PID Pressure thresholds Ventilation Air quality Downgraded fresh air flow rate Fire management Night cooling and free cooling Energy optimisation Heat recovery unit Communication Temperature management...
  • Page 14 2 - THE CONTROL PLC It is possible to seek a parameter from its number. To do so, press the icon in the menu bar. Enter the parameter number, and validate with . If the parameter exists and your access level is sufficient, you will be automatically redirected to the page containing this parameter.
  • Page 15 2 - THE CONTROL PLC Pressing on the stars will bring up a numeric keypad to enter the password for the desired level: Once a password has been entered, is used to view the password, and is used to validate. Curves The screen records the values of the main parameters (temperatures, flow rate, duct pressure and filter differential pressure).

  • Page 16: Features

    3 - FEATURES 3.1 - Management of on and off modes The unit can be started by the terminal or by the CMS. Parameter P716 is used to authorise or deny CMS control of the unit. When the unit is operating, an on/off "remote control" input is used to stop the unit. This may have been previously started up by the HMI in the ON position.

  • Page 17: Mixing Damper

    3 - FEATURES 3.4 - Mixing damper If a mixing damper is present in the unit (P27 = with), it is necessary to configure its opening time (P166). A minimum opening value can be set using parameters P208 and P209. The damper operates with 100% fresh air in night cooling or free cooling mode.
  • Page 18 3 - FEATURES Heating PID Temperature setpoint 1 in heating mode Temperature setpoint 2 in heating mode Temperature control PID proportional band (P) in heating mode Temperature control PID integral time (I) in heating mode Temperature control PID derivative time (D) in heating mode Supply air limitation When control is being applied to the return air or room air, the supply air temperature can be limited.

  • Page 19: Fan Control

    3 - FEATURES Supply air compensation When control is being applied to the return air or room air, the supply air temperature can be compensated. This compensation is used avoid blowing air at too cold or too high a temperature when the control is in deadband mode (no heating or cooling requirement calculated).
  • Page 20 3 - FEATURES Constant duct pressure control A pressure sensor should be added and installed in the duct before this function is activated. This sensor should be connected to terminal strip Xf19 in the unit. An autozero should be performed when commissioning this sensor. Refer to the unit's manual for the electrical connection and autozero.

  • Page 21: Energy Recovery

    3 - FEATURES Air intake fan Air intake ventilation control Air intake fan Air extraction ventilation control Multiplication factor value of the signal sent by the air extraction fan with pressure control in the supply air duct 3.8 - Energy recovery 3.8.1 - Recovery operation The unit has a variable speed rotary heat exchanger or a plate heat exchanger.

  • Page 22: Coils

    3 - FEATURES 3.9 - Coils The unit may contain two coils (hydraulic and/or electric). These coils are configured using parameters P28, P29 and P32. They may be a cooling coil, a heating coil or a mixed coil (heating or cooling according to the network temperature), or an electric heater.

  • Page 23: Free Cooling

    3 - FEATURES Electric heater Minimum flow rate for electric heater operation Minimum flow rates depending on the unit model: Model (P1) Electric heater min. flow rate (P126) Model (P1) Electric heater min. flow rate (P126) Classic RHE 4000 Alu 2000 m Classic PHE 1000 Alu 500 m...

  • Page 24: Co Air Quality

    3 - FEATURES 3.12 - CO air quality Before activating the air quality function (P152), you need to install a CO sensor in the exhaust air flow, and connect it to the terminal strip situated in the electrics box. Refer to the unit's manual for the installation and electrical connection. This function calculates an IAQ (Indoor Air Quality) requirement thanks to a proportional controller (P217) so that the CO concentration setpoint (P216) can be monitored.

  • Page 25: Remote Control In Th-Tune Room

    3 - FEATURES 3.14 - Remote control in Th-Tune room The Th-Tune (optional) is a room thermostat and is used as a room temperature sensor. It is used to display the unit status (setpoints, operating status, ventilation status). It is used to modify temperature setpoint 1 and force operation to setpoint 1 or 2. To connect the Th-Tune to the terminal strip located in the electrics box, refer to the unit's wiring diagram.

  • Page 26: Temperature Setpoint Compensation

    3 - FEATURES Current unit status Symbols Description Active fault present (maintenance) Fire fault active Symbol flashing: ventilation starting Symbol off when the ventilation is in a steady state Setpoint monitored Symbols Description Setpoint 1 in progress Setpoint 2 in progress Temperature, setpoint, time (central part of screen) Symbols Description...

  • Page 27: Downgraded Fresh Air Flow Rate

    3 - FEATURES The calculated compensations are added to the selected setpoint 1 or 2 to give the setpoint value to be used. Temperature setpoint compensation activation 270,1 Heating compensation start fresh air temp 270,2 Heating compensation end fresh air temp. 270,3 Heating compensation max.

  • Page 28: Access Level

    3 - FEATURES When the ranges overlap, the priority, from least to most important, is as follows: 1. Off 2. Frost protection 3. Night cooling 4. On setpoint 2 By default (no time schedule within the range), the machine is in setpoint 1 mode. The annual programming takes priority over the weekly programming.

  • Page 29: Managing The Connection Between Controllers And Alphanumeric Terminals

    4 - MANAGING THE CONNECTION BETWEEN CONTROLLERS AND ALPHANUMERIC TERMINALS This section applies only to alphanumeric terminals. The touch screen terminal does not need to be addressed; it dialogues directly with the controller at address 1, and does not manage communication with other controllers. The touch screen cannot be used to network multiple controllers on the pLAN.

  • Page 30: Electrical Connections For The Plan (Local Area Network)

    4 - MANAGING THE CONNECTION BETWEEN CONTROLLERS AND ALPHANUMERIC TERMINALS 4.3 - Electrical connections for the pLAN (local area network) 4.3.1 - Connecting controllers to the pLAN The electrical connection between the controllers under the pLAN (RS485) is carried out using an AWG20/22 shielded cable composed of a twisted pair and a shield.

  • Page 31: Addressing The Plan

    4 - MANAGING THE CONNECTION BETWEEN CONTROLLERS AND ALPHANUMERIC TERMINALS 4.4 - Addressing the pLAN 4.4.1 - Operation Once the controllers are connected over the pLAN network, the controllers and the terminals must be addressed. The range of addresses usable is from 1 to 32. This means that a total of 32 controllers and terminals can be connected over the pLAN.
  • Page 32 4 - MANAGING THE CONNECTION BETWEEN CONTROLLERS AND ALPHANUMERIC TERMINALS 4.4.2 - Modifying the HMI LCD terminal addresses It is only possible to modify the address of the terminal when it is connected to the controller (telephone connector) and when the controller is powered on. - To enter configuration mode, simultaneously press the buttons, holding for at least 5 seconds;...
  • Page 33 4 - MANAGING THE CONNECTION BETWEEN CONTROLLERS AND ALPHANUMERIC TERMINALS From a terminal To modify the address for the controllers: - The terminal must have an address set to 0 (see the procedure in section 4.4.2) - Switch off the power - Once the machine is re-energised, press the buttons simultaneously until the screen below is displayed, then release.
  • Page 34 4 - MANAGING THE CONNECTION BETWEEN CONTROLLERS AND ALPHANUMERIC TERMINALS 4.4.5 - Checking the pLAN address The pLAN address is displayed at the top of the main screen, in the centre. It is also possible to access parameter P720 in the configuration parameters, so as to read the controller address on the pLAN.

  • Page 35: Connecting To A Cms

    5 - CONNECTING TO A CMS The controller may be connected to a local or remote supervision PC via most communication protocols (ModBus RTU, ModBus IP, LonWorks, KNX or BACnet IP). Using KNX, LonWorks, ModBus IP or BACnet IP requires the installation of optional boards. The Modbus/BACnet, KNX and LON communication tables are available separately.

  • Page 36: Modbus Tcp/Ip And Bacnet Ip

    5 - CONNECTION TO A CMS 5.2 - Modbus TCP/IP and BACnet IP Configuring the board MAC address Ethernet LED Status LED Pushbutton Earth connector The board is factory fitted. If this is not the case, switch off the controller and insert the board in J13 (entitled BMS card or BMS1) on the controller.
  • Page 37 5 - CONNECTION TO A CMS A new window will open. In the left-hand section, select Change adapter settings. Right-click with the mouse on the name of the network connection you wish to configure. In the menu which appears, select Properties. Select the row Internet Protocol Version 4 (TCP/IPv4).
  • Page 38 5 - CONNECTION TO A CMS Once these elements have been modified, connect a network cable between your PC and the board. Open an internet browser (Internet explorer, Chrome, Firefox, etc.) and enter http://172.16.0.1 in the address bar You will now be connected to the web server. For access, the login is: admin The password is fadmin Click in the Configuration menu, and select the Network tab.

  • Page 39: Lon

    5 - CONNECTION TO A CMS Next, in the BACnet tab (for BACnet communication), check that this is activated and set the parameters as required. Once complete, confirm the page, disconnect your PC, restart the PLC and connect it to the network. For use with Modbus TCP/IP, configure P700 = Modbus TCP.
  • Page 40 5 - CONNECTION TO A CMS To validate the LON communication protocol on the PLC, adjust the following values in the "Communication" menu on the user terminal: - P700 = Protocol = LON - P716 = Control type = Local for LON access to the read-only variables (nvo) Remote for LON access to the read and write datapoints (nvi/nvo) The manufacturer does not provide a system start-up, configuration, parameter setting or LonWorks network addressing service.
  • Page 41 5 - CONNECTION TO A CMS Give this model a name and, in the description box, select the xif provided using the " ... " key. The air handling unit controller will now appear in the list of node models, which will enable as many controllers to be created in the database as there are controllers present on the network.

  • Page 42: Knx

    5 - CONNECTION TO A CMS 5.4 - KNX The use of KNX requires an optional board. The board is factory fitted. If this is not the case, switch off the controller and insert the board in J13 (entitled BMS card or BMS1) on the controller. The bus used is a TP1, with a transmission speed of 9600 Bds.
  • Page 43 5 - CONNECTION TO A CMS Configuration process The first step of the configuration is performed OFFline (i.e. disconnected from the network). It consists of defining, within ETS, the list of products used in the project and of defining the group addresses (i.e. the data which will be exchanged between the KNX controllers).
  • Page 44 5 - CONNECTION TO A CMS The assignment of the individual address, and the loading of the addresses and parameters are carried out as normal, for any other KNX product. FLOWAY EN-44...

  • Page 45: Commissioning

    6 - COMMISSIONING 6.1 - Actions required prior to commissioning To perform commissioning on the air handling unit, it is necessary to check that the electric wiring complies with the diagram and with best industry practice. The air handling and hydraulic circuits must be compliant and in working order. Once these actions are complete, it is necessary to complete the "assembly completion notice"...

  • Page 46: Faults

    7 - FAULTS When the PLC detects an issue, it triggers a fault. 7.1 - Type of faults Faults may either be "maintenance" or "danger" type faults. "Maintenance" faults are information provided to the user and signal that the unit is not operating correctly, but that this does not have any immediate consequences (a fouled filter, for example).

  • Page 47: Diagnostics

    7 - FAULTS 7.5 - Diagnostics Fault Sources Causes Solutions The circuit breaker has been triggered Check the wiring and the components Powered down The power supply has been cut Voluntary stop Empty Triggered by the fume detector or by the The "fire protection"...
  • Page 48 7 - FAULTS Fault Sources Causes Solutions Temperature sensor operating problem Check the operation of the sensor Return temperature too low Supply air temperature limits incorrectly Check the configuration configured The return temperature (or room temperature) is below the fixed limit P242 Operating problem with the heating Check the operation of the valves, heat recovery (or P244)

  • Page 49: Parameters

    8 - PARAMETERS Here is the list of parameters settable by: - The user (access level 1 - no password on alphanumeric terminals, password 1111 on touch screen terminals) - The installer (access level 2) - The manufacturer (access level 3) The level 2 password can be requested from your technical support.

  • Page 50: Setting Parameter

    8 - PARAMETERS Setting Access Description Display conditions level Enumeration By default 0: Without 1: Plate Heat recovery unit as per P1 Read-only 3: Gradual speed heat recovery unit P01 = Classic RHE or Vertical PHE 0: Without Differential pressure sensor on the heat recovery unit or (P01 = Classic PHE and P31 Electric 1: With preheater = without)
  • Page 51 8 - PARAMETERS Setting Access Description Unit Display conditions level Enumeration By default P104 Intake ventilation control = Duct pressure P160 Setpoint 1/setpoint 2 selection = time sched/CMS or on/off input or on/off Air intake duct pressure setpoint 2 override P161 Application of setpoint 1/setpoint 2 selection = ventilation or temperature + ventilation...
  • Page 52 8 - PARAMETERS Setting Access Description Unit Display conditions level Enumeration By default P104 Intake ventilation control = Duct pressure Exhaust duct pressure control PID derivative time (D) P105 Exhaust ventilation control = Duct pressure P104 Intake ventilation control = Duct pressure Exhaust duct pressure lower limit threshold P105 Exhaust ventilation control =...
  • Page 53 8 - PARAMETERS Setting Access Description Unit Display conditions level Enumeration By default Temperature control PID derivative time (D) in cooling mode Temperature setpoint 1 in heating mode 23,0 °C P160 Setpoint 1/setpoint 2 selection = time sched/CMS or ON/OFF input or on/off override Temperature setpoint 2 in heating mode 18,0...
  • Page 54 8 - PARAMETERS Setting Access Description Unit Display conditions level Enumeration By default Low supply air temperature compensation setpoint in P157 Supply air compensation in 16,0 °C deadband deadband Low supply air temperature compensation proportional P157 Supply air compensation in °C band in deadband deadband...

  • Page 55: Reading Parameter

    8 - PARAMETERS 8.3 - Reading parameter Setting Access Description Unit Display conditions level Enumeration Min. Max. Increment P104 Air intake ventilation control = Calculated intake flow rate setpoint 150000 Flow rate Air intake fan flow rate 320000 Intake fan differential pressure 5000 P104 Air intake ventilation control = Intake duct calculated pressure setpoint...
  • Page 56 8 - PARAMETERS Setting Access Description Unit Display conditions level Enumeration Min. Max. Increment 0: C (closed) P36 Heat recovery unit = Gradual speed Rotary heat recovery unit control 1: O (open) heat recovery unit P31 Elec preheater = with or P32 Elec heater = 1 on/off stage 0: C (closed) Electric heater safety thermostat...
  • Page 57 8 - PARAMETERS Setting Access Description Unit Display conditions level Enumeration Min. Max. Increment 0: off Pump 2 P93 Coil 2 pump = With 1: on Pump 2 operating-hour meter 999999,9 P93 Coil 2 pump = With 0: off P90 External generator = heater External generator run order 1: on or cooler...

  • Page 58: Versions

    8 - PARAMETERS 8.4 - Versions Description Access level AHU software version AHU Bios version AHU boot version SO number 8.5 - Fault level Setting Access Description Display conditions level Enumeration By default 0: Maintenance Air intake filter 1 fouled 1: Danger 0: Maintenance Exhaust filter 1 fouled...

  • Page 59: Communication Parameters

    8 - PARAMETERS 8.6 - Communication parameters Setting Access Description Display conditions level Enumeration By default BMS1 0: None 1: MODBUS RTU 2: LON Selection of the type of communication protocol used 3: KNX on the BMS1 port 4: MODBUS TCP 5: BACNET IP 6: WEB 0: 1200...

  • Page 60: Sw Direction

    8 - PARAMETERS 8.8 - SW direction Access Description Enumeration Display conditions level 0: Normally Open Remote control input direction 1: Normally Closed 0: NO for setpoint 1 P160 setpoint 1/setpoint 2 selection = Setpoint 1/Setpoint 2 input direction 1: NC for setpoint 1 on/off input or on/off override 0: Normally Open Fire detection input direction...

  • Page 61: Prioritisation

    8 - PARAMETERS 8.9 - Prioritisation Setting Access Description Unit Display conditions level Min. Max. Increment Heat recovery unit operation start cooling percentage P903 Heat recovery unit operation end cooling percentage P902 P28 Water coil no.1 = Cooling Coil 1 operation start cooling percentage P905 or Mixed P28 Water coil no.1 = Cooling...
  • Page 64 Manufacturer: CIAT SA, Culoz, France. Printed in the European Union. Manufacturer reserves the right to change any product specifications without notice.

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