Theben FCA 2 Manual
  1. Manuals
  2. Brands
  3. Theben Manuals
  4. Controller
  5. FCA 2
  6. Manual

Theben FCA 2 Manual

Fan coil actuator
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Fan Coil Actuator FCA 2
Fan Coil Actuator FCA 2
FCA 2
4920210
1
89
Updated: Feb-16 (subject to changes)
Page
of

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the FCA 2 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Theben FCA 2

Summary of Contents for Theben FCA 2

  • Page 1 Fan Coil Actuator FCA 2 Fan Coil Actuator FCA 2 FCA 2 4920210 Updated: Feb-16 (subject to changes) Page...

  • Page 2: Table Of Contents

    Advantages of the FCA 2 ....................6 1.2.1 Special features ......................6 Technical Data ......................... 7 The application program "FCA 2 Fan Coil Actuator 0-10V" ..........8 Selection in the product database ..................8 Parameter pages ........................ 9 Communication objects ....................10 3.3.1 Characteristics of objects ...................
  • Page 3 Fan Coil Actuator FCA 2 5.3.4 Important parameter settings ..................63 Typical application (4-pipe system): ................64 5.4.1 Task: ........................... 64 5.4.2 Devices: ........................64 5.4.3 Overview ........................64 5.4.4 Implementation: ......................65 Objects and links ........................66 5.4.5 Important parameter settings ..................67 Appendix ..........................

  • Page 4: Function Description

    Fan Coil Actuator FCA 2 1 Function description • Fan coil actuator • For controlling fan coils • For 2- and 4-pipe systems • For up to three fan stages • Fans optionally also with 0-10 V output • For proportional valves 0-10 V •...

  • Page 5: Operation And Display

    Fan Coil Actuator FCA 2 1.1 Operation and display FCA 2 is fitted with 9 LEDs and 2 push buttons. • 3 red LEDs for displaying fan stage/fan speed (see figure 1) • 1 red LED for heating mode • 1 blue LED for cooling mode •...

  • Page 6: Advantages Of The Fca 2

    Fan Coil Actuator FCA 2 1.2 Advantages of the FCA 2 • Operating voltage 100-240 V 50/60 Hz. • Suitable for 0-10 V valves. • Optional internal or external temperature controller. • Can be used in 2- and 4-pipe systems.

  • Page 7: Technical Data

    Fan Coil Actuator FCA 2 2 Technical Data Power supply via mains 230 +/-10 VAC 50 Hz Bus voltage, ≤ 8 mA Operating voltage KNX Operating voltage 100 – 240 V AC Frequency 50 – 60 Hz Width 4 TE...

  • Page 8: The Application Program "Fca 2 Fan Coil Actuator 0-10V

    Fan Coil Actuator FCA 2 3 The application program "FCA 2 Fan Coil Actuator 0-10V" 3.1 Selection in the product database Theben AG Manufacturer Heating, ventilation, air conditioning Product family Product type Fan coil actuators FCA 2 Fan Coil Actuator 0-10V...

  • Page 9: Parameter

    Fan Coil Actuator FCA 2 3.2 Parameter pages Table 2 Function Description General Supported functions, operation, filter change Number of fan stages, switch-on thresholds, etc. Heating valve Factory settings for heating valve Cooling valve Factory settings for cooling valve Factory valve settings for 2-pipe systems...

  • Page 10: Communication Objects

    Fan Coil Actuator FCA 2 3.3 Communication objects 3.3.1 Characteristics of objects FCA2 features 33 communication objects. Some objects can assume various functions, depending on their configuration. Table 3 Type Function Object name C R W T Heating actuating value...
  • Page 11 Fan Coil Actuator FCA 2 Continuation: Function Object name Type C R W T Fan stage in forced 1 byte Fan control with % value C R W - operation 5,001 Fan stage in forced 1 byte Fan control via level...
  • Page 12 Fan Coil Actuator FCA 2 Continuation: Function Object name Type C R W T 1 bit Night mode <-> Standby 1 = Night mode C R W - 1,001 1 byte Operating mode preset Operating mode preset C R W -...

  • Page 13: Description Of Objects

    Fan Coil Actuator FCA 2 3.3.2 Description of objects • Object 0 "Actuating value for fan" / "Actuating value heating/cooling" transmit or receive. The function of the object is connected with the parameters "Supported function" and "Type of controller used" on the "General" parameter page.
  • Page 14 Fan Coil Actuator FCA 2 • Object 1 "Actuating value cooling", "Heating/cooling", "Block heating", "Enable cooling" The function of the object is connected with the parameters "Supported function" and "System type" on the "General" parameter page. Table 5 Installation type...
  • Page 15 Fan Coil Actuator FCA 2 • Object 4 „fan stage“, „fan speed“ Reports the current fan stage or fan speed. Depending on the configured fan controller (General parameter page), the object either sends the current stage (0..3) or the speed in percent.
  • Page 16 Fan Coil Actuator FCA 2 • Object 8 "Fan stage in forced operation" Via this object, the desired fan stage in forced operation is either defined as a percentage value between 0 % and 100 % or as a stage (1-3).
  • Page 17 Fan Coil Actuator FCA 2 • Object 9 "Limitation of fan stage in %", "Limitation of fan stage (1-2-3)" This object can be used to set the maximum permitted actuating value and the associated maximum fan stage, either as a percentage value or as stage (1-3).
  • Page 18 Fan Coil Actuator FCA 2 • Object 11 "Fan stage 1" Only available if fan controller = standard. Report object for the fan status. Sends a 1 if the fan is switched to stage 1. • Object 12 "Fan stage 2"...
  • Page 19 Fan Coil Actuator FCA 2 • Object 16 "Condensation monitoring status" The function of this object depends on the "Source for drip condensation monitoring" parameter on the "Condensation monitoring" page. Table 11 Parameters „Source for condensation Function monitoring“ Sends the status of the condensation monitoring...
  • Page 20 Fan Coil Actuator FCA 2 • Object 20 "Actuating value loss" / "sensor failure" The function of the object depends on the "Type of controller used" parameter on the "General" parameter page. Table 13 „Type of controller used“ Function Reports error if the temperature sensor connection is Internal controller interrupted or shorted.
  • Page 21 Fan Coil Actuator FCA 2 • Object 22 "Comfort" / "Presence" The object function depends on the "Object for operating mode preset" parameter on the "Operating mode and operation" parameter page. Table 15 "Objects for determining the operating Function mode"...
  • Page 22 Fan Coil Actuator FCA 2 • Object 24 "Current operating mode" Sends the current operating mode as a 1 byte value (see below: Coding of operating modes). The transmission behaviour can be set on the "Operating mode" parameter page. Table 17: Coding of HVAC operating modes:...
  • Page 23 Fan Coil Actuator FCA 2 • Object 28 "Heating/cooling" Only available in 4-pipe system when switching via object (internal controller). Is used if automatic change over between heating and cooling is not desired or not possible. The direction of action is defined by parameter Format object heating/cooling (see Control parameter page).
  • Page 24 Fan Coil Actuator FCA 2 • Object 31 "Change filter " This object is available if the "Should a filter change be reported" parameter is set to "yes". This object has 2 functions: 1. As sending object: Sends a 1 once the configured operating time of the fan has been reached.

  • Page 25: Parameters

    Fan Coil Actuator FCA 2 3.4 Parameters The standard values are in bold. 3.4.1 Parameter page General Different parameters are displayed, depending on the selection of the supported function. Table 19 Designation Values Meaning Supported function Available system Heating Cooling...
  • Page 26 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Should a filter change be Activates the „Filter reported monitoring“ parameter page. Should the actuating value See in the appendix: be monitored Monitoring of actuating value Switch fan between auto The forced operation is...

  • Page 27: Parameter

    Fan Coil Actuator FCA 2 3.4.2 Parameter page Fan 3.4.2.1 Fan controller = standard (1-3 stages) IMPORTANT: The difference between the 2 switch-on thresholds must be at least 15 %. Table 20 Designation Values Meaning Fan controller standard (1-3 stages) A standard fan with up to 3 stages is used.
  • Page 28 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Fan starting strategy directly The fan should start directly at the configured fan stage. via stage 1, 5 s The fan should always start at via stage 1, 10 s the lowest level and switch to...
  • Page 29 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Warm start no warm start The fan starts as soon as the valve is opened. 30 s, 1 min, 1 min 30 s, The valve is opened first. The 2 min, 2 min 30 s, 3 min,...
  • Page 30 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Format and cycle time of Object 4 sends the current fan fan stage object stage as a number between 0 and 3. Format counter value, do not Only at change. send cyclically...
  • Page 31 Fan Coil Actuator FCA 2 3.4.2.2 Fan controller = 0-10 V Table 21 Designation Values Meaning Fan controller standard (1-3 stages) A standard fan with up to 3 stages is used. (Connectors 0-10 V A fan with 0-10 V controller...
  • Page 32 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Warm start no warm start The fan starts as soon as the valve is opened. 30 s, 1 min, 1 min 30 s, The valve is opened first. The 2 min, 2 min 30 s, 3 min,...

  • Page 33: Parameter Page Heating Valve

    Fan Coil Actuator FCA 2 3.4.3 Parameter page Heating valve Table 22 Designation Values Meaning Time for closing the valve 0 min, 1 min, 2 min, 3 min, Adjustment to the used 4 min, 5 min, 6 min, 7 min, actuator.
  • Page 34 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Time between heating and 0 min, 1 min, 2 min, 3 min, Delay when changing from cooling 4 min, 5 min, 6 min, 7 min, heating to cooling after the 8 min, 9 min, 10 min, 15 min,...

  • Page 35: Parameter Page Cooling Valve

    Fan Coil Actuator FCA 2 3.4.4 Parameter page Cooling valve Table 23 Designation Values Meaning 0 min, 1 min, 2 min, Adjustment to the used 3 min, 4 min, 5 min, actuator. Time for closing the valve 6 min, 7 min, 8 min,...

  • Page 36: Parameter Page "Heating/Cooling Valve" (Only With 2-Pipe System)

    Fan Coil Actuator FCA 2 3.4.5 Parameter page "Heating/cooling valve" (only with 2-pipe system) Table 24 Designation Values Meaning 0 min, 1 min, 2 min, Adjustment to the used 3 min, 4 min, 5 min, actuator. Time for closing the valve...

  • Page 37: Parameter Page Additional Relay

    Fan Coil Actuator FCA 2 3.4.6 Parameter page Additional relay Table 25 Designation Values Meaning Switching on the additional The additional relay is only Via object relay controlled from outside via the bus (see object 5) If heating is required...

  • Page 38: Parameter Page E1

    Positive or negative 0.1 K (-50..50) correction of the measured temperature in 1/10K increments. Examples: a) FCA 2 sends 20.3 °C. A room temperature of 21.0 °C is measured using a calibrated thermometer. In order to increase the temperature of FCA 2 to 21 °C, “7”...

  • Page 39: Parameter Page E2

    Fan Coil Actuator FCA 2 3.4.8 Parameter page E2 This page is only available if the Supported function parameter is set to Heating (General parameter page). Table 27 Designation Values Meaning Function of E2 Contact closed = window closed Type of connected contact...

  • Page 40: Parameter Page Setpoint Adjustment

    Fan Coil Actuator FCA 2 3.4.10 Parameter page Setpoint adjustment The setpoint adjustment is to prevent a too large temperature difference between inside and outside during the summer. For this, the defined setpoint in cooling mode can be raised automatically in proportion to the temperature increase outside.
  • Page 41 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Format of correction value relative Obj. 19 sends a temperature difference in K, depending on the outdoor temperature. This value can be used as a setpoint offset for additional room thermostats.

  • Page 42: Parameter Page Setpoints (Internal Controller)

    Fan Coil Actuator FCA 2 3.4.11 Parameter page Setpoints (internal controller) Table 30 Designation Values Meaning Base setpoint after reset 15 °C, 16 °C, 17 °C Output setpoint for 18 °C, 19 °C, 20 °C temperature control. 21 °C, 22 °C, 23 °C 24 °C, 25 °C, 26 °C...
  • Page 43 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Current setpoint in Sends actual value (heating < > The setpoint actually being comfort mode used for control is always to cooling) be sent (= current setpoint). Example with Base setpoint 21°C and dead zone of 2 K:...

  • Page 44: Parameter Page Regulation (Internal Controller)

    Fan Coil Actuator FCA 2 3.4.12 Parameter page Regulation (internal controller) Table 31 Designation Values Meaning Setting the control parameters For standard use. Standard The control parameters are preset. User-defined Professional application: The control parameters can be individually adjusted. See appendix: temperature...
  • Page 45 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Proportional band of the pure P controller Only proportional cooling control controllers. See appendix: temperature control 1 K, 1.5 K, 2 K Professional setting for 2.5 K, 3 K, 3.5 K adapting control response 4 K, 4.5 K, 5 K...
  • Page 46 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Format object heating/cooling DPT100 KNX standard. (Heating=1/Cooling=0) Inverted Inverted (compatible with (Heating=0/Cooling=1) RAM 713 Fan Coil). Transmission of actuating value at change by 1 % After what percentage at change by 2 %...
  • Page 47 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Report cyclically every 3 min, 5 min, 10 min Cyclical transmission time 15 min, 20 min, 30 min for energy medium error 60 min message *Change since last transmission Updated: Feb-16 (subject to changes)

  • Page 48: Parameter Page Operating Mode And Operation (Internal Controller)

    Fan Coil Actuator FCA 2 3.4.13 Parameter page Operating mode and operation (internal controller) Table 32 Designation Values Meaning Operating mode after reset Frost/heat protection Operating mode after start-up Temperature reduction at night or reprogramming Standby Comfort Transmission of current...
  • Page 49 Fan Coil Actuator FCA 2 Continuation: Designation Values Meaning Time for comfort extension 30 min How long should the 1 hour controller stay in comfort 1.5 hours operating mode after presence has been detected? (Only for 2 hours 2.5 hours presence button).

  • Page 50: Parameter Page Filter Monitoring

    Fan Coil Actuator FCA 2 3.4.14 Parameter page Filter monitoring This parameter page is only visible if this function has been selected on the General parameter page (parameter: Should a filter change be reported). Table 33 Designation Values Meaning Report filter change after manual input: 1..127...

  • Page 51: Parameter Page Actuating Value Loss

    Fan Coil Actuator FCA 2 3.4.15 Parameter page Actuating value loss This parameter page is only visible if an external controller is used and if this function has been selected on the General parameter page (parameter: Should the actuating value be monitored).

  • Page 52: Start-Up

    (A+B) by downloading the application (parameter Test mode after Reset = blocked) If no button is pressed while the test mode LED is flashing, the FCA 2 automatically moves to normal operation after one minute.
  • Page 53 Fan Coil Actuator FCA 2 Operation: • Fan control: The following operating conditions are accepted in sequence if button A (fan) is pressed. Table 35: Standard fan controller Button push Function Fan stage 1 S1 on Fan stage 2 S2 on...
  • Page 54 Fan Coil Actuator FCA 2 • Control valves, switch on additional relay: The following operating conditions are accepted in sequence if button B (valves) is pressed. Table 37 Button push LED Output Cooling LED on After 2 s [V2+] = 10 V...
  • Page 55 Fan Coil Actuator FCA 2 Checking the temperature sensor (Order No. 907 0 321): If a temperature sensor is connected to input E1, and E1 is configured accordingly in the application, the measured room temperature is transmitted by object 14.

  • Page 56: Device Leds In Automatic Mode

    Fan Coil Actuator FCA 2 4.2 Device LEDs in automatic mode Figure 4 LED Function Explanation Fan stage 1 Lights up if fan stage 1 is active, or with fan speed 1 – 32 % (Starting strategy is not taken into account).

  • Page 57: Typical Applications

    5 Typical applications 5.1 Base configuration (4-pipe system): Heating and cooling with fan coil with external controller The FCA 2 is controlled by a RAM 713 FC room thermostat. 5.1.1 Devices: • FCA 2 (Order No. 4920210) • RAM 713 FC (Order No. 7139202) 5.1.2 Overview...

  • Page 58: Important Parameter Settings

    Fan Coil Actuator FCA 2 5.1.4 Important parameter settings The standard parameter settings apply for unlisted parameters. Table 40: FCA 2 Parameter page Parameters Setting General Supported function Heating and cooling Installation type 4-pipe system Type of controller used external controller...

  • Page 59: Base Configuration (2-Pipe System): Heating And Cooling With Fan Coil With External Controller

    Fan Coil Actuator FCA 2 5.2 Base configuration (2-pipe system): Heating and cooling with fan coil with external controller 5.2.1 Devices: • FCA 2 (Order No. 4920210) • RAM 713 FC (Order No. 7139202) 5.2.2 Overview Figure 6 * H/C = heating / cooling system 5.2.3 Objects and links...

  • Page 60: Important Parameter Settings

    Fan Coil Actuator FCA 2 5.2.4 Important parameter settings The standard parameter settings apply for unlisted parameters. 5.2.4.1 FCA 2 Table 43 Parameter page Parameters Setting General Supported function Heating and cooling Installation type 2-pipe system Type of controller used external controller 5.2.4.2 RAM 713 FC...

  • Page 61: Devices

    A RAM 713 FC room thermostat and a FCA 2 fan coil actuator control a heating/cooling system. Once humidity has reached a defined limit value (80 %), an alarm telegram is sent to prevent further cooling and thus an increase in humidity.

  • Page 62: Objects And Links

    Fan Coil Actuator FCA 2 5.3.3 Objects and links Table 45 Amun 716 KNX FCA 2 Comment Object name Object name Do not cool any further, Humidity threshold 3 Dew point alarm humidity is too high. Table 46: Links RAM 713 FC...

  • Page 63: Important Parameter Settings

    Fan Coil Actuator FCA 2 5.3.4 Important parameter settings Standard or customer-defined parameter settings apply to unlisted parameters. Table 47: Amun 716 Parameter page Parameters Setting Humidity thresholds Relative humidity threshold 3 80 % (in %) Hysteresis Humidity threshold 3...

  • Page 64: Typical Application (4-Pipe System)

    This improves the level of comfort for the office users, as it prevents too extreme a temperature difference when leaving the office. 5.4.2 Devices: • FCA 2 (Order No. 4920210) • RAM 713 FC (Order No. 7139202) • TR 648 top2 RC (Order No. 6489212) •...

  • Page 65: Implementation

    Via these objects, the FCA 2 controls the valves, and also the fan in auto position. For a manual setting of the fan stages, objects 8 and 15 of the FCA 2 are connected with objects 16 and 17 of the RAM 713 FC.

  • Page 66: Objects And Links

    Fan Coil Actuator FCA 2 Objects and links Table 50: Temperature controller links with the fan coil actuator. RAM 713 FC FCA 2 Comment Object name Object name FCA receives the heating Heating actuating value Heating actuating value actuating value.

  • Page 67: Important Parameter Settings

    Fan Coil Actuator FCA 2 5.4.5 Important parameter settings The standard parameter settings apply for unlisted parameters. Table 54: FCA 2 Parameter page Parameters Setting General Supported function Heating and cooling Heating system Fan coil Cooling system Fan coil Installation type...
  • Page 68 Fan Coil Actuator FCA 2 Table 58: thePrema P360 KNX presence detector Parameter page Parameters Setting General Channel C4 function – Presence active Objects (Presence Telegram type C4.1 Switch command channel C4) Telegram Updated: Feb-16 (subject to changes) Page...

  • Page 69: Appendix

    6.1.3 In practice The room thermostat is configured for the cyclical transmission of the actuating value. On the FCA 2, the monitoring time is set to a value that is at least twice the cycle time of the room thermostat.

  • Page 70: Setting The Valve Characteristic

    Fan Coil Actuator FCA 2 6.2 Setting the valve characteristic The parameters on the heating valve and cooling valve pages allow an exact adjustment to the available valve type or allow the slight adjustment of the control. Example for a valve that starts to open from a position of 10 % and is already completely open at 80 %.

  • Page 71: Setpoint Offset

    Fan Coil Actuator FCA 2 6.3 Setpoint offset The current setpoint can be offset via object 25 "Manual adjustment" by up to +/- 5 K manually. With every alteration, the adjusted setpoint is transmitted by the Current setpoint object (object 27).

  • Page 72: Format Of Setpoint Correction: Relative

    Fan Coil Actuator FCA 2 6.4.3 Format of setpoint correction: Relative Setpoint adjustment is sent from object 19 as a temperature difference. As long as the setpoint correction threshold (setpoint correction from) has not been reached, the value 0 is sent.
  • Page 73 Fan Coil Actuator FCA 2 Table 60: Correction values Outdoor temp. 1K/1K 1K/2K 1K/3K 1K/4K 1K/5K 1K/6K 1K/7K 10 K 11 K 12 K 13 K 14 K 15 K Updated: Feb-16 (subject to changes) Page...

  • Page 74: Format Of Setpoint Correction: Absolute

    Fan Coil Actuator FCA 2 6.4.4 Format of setpoint correction: Absolute Object 19 transmits the corrected setpoint to the bus for additional room thermostats. It is typically linked to the room thermostat base setpoint object. This setpoint is calculated of: Base setpoint without correction + dead zone + adjustment.
  • Page 75 Fan Coil Actuator FCA 2 Table 61: Setpoints Outdoor temp. 1K/1K 1K/2K 1K/3K 1K/4K 1K/5K 1K/6K 1K/7K 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00 22.00...

  • Page 76: Frost Protection (Or Heat Protection) Via Window Contact

    Important: The corresponding switch object (object 16 Status E2) has to be linked with object 23 (Input window contact) via the group address. FCA 2 will recognise when the window is opened and automatically switch to frost protection mode (heat protection mode).

  • Page 77: Determining The Current Operating Mode

    FCA 2 switches to comfort operating mode (see table). Object 23 is connected to a window contact via the bus (binary input). As soon as a window is opened, FCA 2 switches to frost protection operating mode. Operating mode Specification...

  • Page 78: Old Operating Modes

    Object 22 (comfort) is connected to a presence detector. If presence is detected, FCA 2 switches to comfort operating mode (see table). Object 23 is linked with a window contact: As soon as a window is opened, FCA 2 switches to frost protection mode.

  • Page 79: Determination Of The Setpoint

    Fan Coil Actuator FCA 2 6.7.3 Determination of the setpoint 6.7.3.1 Setpoint calculation in heating mode Table 64: Current setpoint during heating Operating mode Current setpoint Comfort Base setpoint* +/- setpoint offset Standby Base setpoint* +/- setpoint offset – reduction in standby mode Night Base setpoint* +/- setpoint offset –...
  • Page 80 Frost/heat protection configured setpoint for heat protection mode * Base setpoint after reset Example: Cooling in comfort mode. The room temperature is too high and FCA 2 has switched to cooling mode. Table 67: Parameter settings: Parameter page Parameters Setting...

  • Page 81: Heating And Cooling In The 2-Pipe System

    The heating/cooling system must send a 0 for heating mode and a 1 for cooling mode to Object 1 "Changeover between heating and cooling" in FCA 2. 6.7.5 Heating and cooling in the 4-pipe system...

  • Page 82: Fan Control

    Fan Coil Actuator FCA 2 6.8 Fan control 6.8.1 Priorities 1. Convector 2. Fan block 3. Limitation 4. Forced operation 5. Actuating value heating/cooling 6. Additional ventilation Figure 16 The heating system = convector / fan coil and cooling system = convector / fan coil parameters have the highest priority (1.).

  • Page 83: Fan Forced Mode With Ram 713 Fan Coil

    Fan Coil Actuator FCA 2 6.8.2 Fan forced mode with RAM 713 Fan Coil This function allows the fan stage to be preset manually, either by using the button on the RAM 713 Fan Coil or via the bus. It can be time-controlled or permanently activated or blocked on the Operation (RAM) parameter page.
  • Page 84 Fan Coil Actuator FCA 2 Table 70: Example for standard fan Threshold for Set values for Recommended values fan stage RAM 713 Fan Coil for FCA 2 25 % 10 % 55 % 40 % 85 % 70 % If fan stage 2 is selected, object 16 (RAM) sends the actuating value 55 %.

  • Page 85: Time Between Heating And Cooling And Overrun Phase

    Fan Coil Actuator FCA 2 6.8.3 Time between heating and cooling and overrun phase When switching between heating and cooling, the heating valve is first closed; the Overrun time for utilisation of remaining energy starts simultaneously (if configured). After the heating valve is closed, the configured Time between heating and cooling runs.

  • Page 86: Hysteresis

    Fan Coil Actuator FCA 2 6.8.4 Hysteresis To avoid unnecessary switching back and to between fan stages they are switched with a fixed hysteresis of 10 %. The next higher fan stage is assumed when the actuating value has reached the switch-on threshold.

  • Page 87: Temperature Control

    Fan Coil Actuator FCA 2 6.9 Temperature control 6.9.1 Introduction The internal controller can either be used as a P or a PI controller, although the PI control is preferred. With the proportional controller (P controller), the actuating value is statically adjusted to the control deviation.

  • Page 88: Response Of The P Controller

    Fan Coil Actuator FCA 2 6.9.2 Response of the P controller Max. 4l/Min. Set point value Bandwidth Actual value Losses 1l/Min Figure 21 If the filling quantity is 15 l, there is a control deviation of 21 l – 15 l = 6 l As our actual value lies outside the bandwidth, the control will operate the feed at 100 %, i.e.

  • Page 89: Response Of The Pi Controller

    Fan Coil Actuator FCA 2 P controller as temperature controller Just as in the previous example, the P controller behaves in a heating control. The setpoint temperature (21 °C) can never be completely reached. The permanent control deviation is increased the higher the heat losses, i.e. the colder the outdoor temperatures.

Table of Contents