SystemAir Access V4.X Configuration Manual
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SystemAir Access V4.X Configuration Manual

SystemAir Access V4.X Configuration Manual

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Access V4.X Configuration manual
EN
Document in original language | 153830 · A001

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Summary of Contents for SystemAir Access V4.X

  • Page 1 Access V4.X Configuration manual Document in original language | 153830 · A001...

  • Page 2: Table Of Contents

    Version Document Preliminary 003 Access V4.X Configuration manual Contents About the manual ..........................3 Basic settings ............................. 3 Access levels ............................3 Date and time ............................3 Preference unit settings ........................3 Communication ............................4 Terminals ............................... 4 Software connectors ..........................4 Port function ............................
  • Page 3 Version Document Preliminary 003 Access V4.X Configuration manual CO2 control ............................. 30 Fan start/stop ............................30 Mixing damper function ........................30 Enthalpy control ............................31 Dampers ..............................31 I/O allocation settings ..........................31 Starting up and stopping the unit ....................... 32 Schedule ..............................

  • Page 4: About The Manual

    Version Document Preliminary 003 Access V4.X Configuration manual 1. About the manual This manual is intended to guide while configuring basic functions of the Access controller. It also gives a general overview of the software and interface. 1.1 Basic settings Access levels The controller has four user access levels.

  • Page 5: Communication

    Version Document Preliminary 003 Access V4.X Configuration manual Configuration > System Settings > Save and restore settings > Save commissioning settings – saves all recently made changes. Restore to commissioning settings – restores to last saved commissioning settings. Restore to factory settings – resets settings to state of delivered unit.

  • Page 6: Port Function

    Version Document Preliminary 003 Access V4.X Configuration manual The communication ports in the Access controller Port 1 (Ext-link), Port 2 (BMS) and Port 3 (Int-link 1|2) can be configured for particular function. Port function These ports can operate as follows: EXOline slave –...

  • Page 7: Communication Devices

    115k2 bps 115200bps Cloud Cloud function must be enabled if the controller shall access “Systemair Connect” cloud service. The provided serial number is unique identification of the controller and must be entered upon request while registering at “Systemair Connect”. Configuration > System settings > Communication > Cloud >...
  • Page 8 Version Document Preliminary 003 Access V4.X Configuration manual Configuration > System Settings > Communication devices > Device (n) > Function > Every device on the bus must have function assigned. Different functions are available in dependence on device type: Rotary...

  • Page 9: Configuration

    Version Document Preliminary 003 Access V4.X Configuration manual 2. Configuration 2.1 Configuration steps The configuration of controller shall start with activation of functions to be used. Configuration order of control system and menu Description Flow The navigation path Configuration ►Functions ►...

  • Page 10: Temperature Control

    Version Document Preliminary 003 Access V4.X Configuration manual 2.2 Temperature control Temperature controller is a closed loop system which includes measurement, processing and adjustment. Temperature control types To maintain comfort temperature the controller constantly adjusts supply air temperature. It can be set constant or variable depending on parameters of choice.

  • Page 11: Heating/Cooling Sequences

    Version Document Preliminary 003 Access V4.X Configuration manual Room outdoor compensated The room temperature can be compensated when the outdoor temperature increases. One can, for instance, imagine accepting a slightly higher room temperature if it is warm outside or, conversely, a slightly lower temperature if it is chilly.
  • Page 12 Version Document Preliminary 003 Access V4.X Configuration manual If required sequence overlapping or dead band can be set by adjusting “Start Heating” and “Start Cooling” sequence parameters. Adjustable range is -100% .. +100%. Negative starting point will create sequence overlap while positive starting point will delay start of the selected sequence.
  • Page 13 Version Document Preliminary 003 Access V4.X Configuration manual Sequence type Each active sequence has to be defined for control of specific device type. Selecting device type reveals relevant settings (e.g. if water heating is selected, then pump control and frost protection options will be available).
  • Page 14 Version Document Preliminary 003 Access V4.X Configuration manual The heater return water temperature is measured using the analogue input (”Frost protection sensor”). Low temperatures will generate an internal, proportional signal that is used to force the heating valve open thereby preventing freeze-up of the heater.
  • Page 15 Version Document Preliminary 003 Access V4.X Configuration manual Configuration: Configuration > Functions > Function activation > Heating/Cooling sequence setup > Step controller 1 (Step controller 2) Cooling Water cooling Control When the unit is in running mode the heating valve is controlled by the analogue output and digital output for pump control and/or signal for start heating.
  • Page 16 Version Document Preliminary 003 Access V4.X Configuration manual When running cascade control, the supply air controller setpoint is normally controlled by the room/extract air controller output signal. When DX cooling is activated, the supply air controller setpoint is lowered to five degrees (adjustable) below the setpoint given by the room/extract air controller.
  • Page 17 Version Document Preliminary 003 Access V4.X Configuration manual Override of reduced speed for DX cooling Override to normal quantity of air for DX cooling when the unit runs on reduced quantity of air. The fans can be set to normal operation when cooling is required at high outdoor temperatures (e.g. >14°C, the same temperature limit as for blocking of DX cooling).
  • Page 18 Version Document Preliminary 003 Access V4.X Configuration manual Defrosting pressure monitoring Configuration > Functions > Temerature control > Defrosting pressure monitoring > Defrosting is activated by measuring the pressure difference over the exchangers extract/exhaust side. The differential pressure transmitter is auto calibrated by the system to obtain the correct pressure in relation to the airflow.

  • Page 19: Step Controller

    Version Document Preliminary 003 Access V4.X Configuration manual Efficiency presentation Defrosting Damper Fan setpoint compensation It is possible to select whether the compensation (0...10000) should increase or decrease the fan setpoint. The 0...10000 compensation follows the current control quantity for the fans.

  • Page 20: Changover Settings

    Version Document Preliminary 003 Access V4.X Configuration manual Changover settings Configuration > Function Configure Changeover 1 sequence for heating Heater Changeover 1 sequence for cooling Cooler Changeover 2 sequence for heating disable Changeover 2 sequence for cooling disable Data & Settings > In-/output status > Digital input (Analogue output)(digital output)*1 Change-over is a function for installations with 2-pipe systems.
  • Page 21 Version Document Preliminary 003 Access V4.X Configuration manual Enable support control when ventilation unit is shut down • • Extract air fan running during support control • • Settings: Data & Setings > Demand control > Support Control > Support control is normally used when room temperature control or extract air control has been configured.

  • Page 22: Free Cooling

    Version Document Preliminary 003 Access V4.X Configuration manual Free cooling This function is used during the summer to cool the building night-time using cool outdoor air, thereby reducing the need for cooling during the day and saving energy. Configuration > Functions > Function Activation > Free cooling > “Yes”...

  • Page 23: Pretreatment

    Version Document Preliminary 003 Access V4.X Configuration manual Data & Settings > Demand Control > Free cooling > Time to block heat output after free cooling > Pretreatment Configuration > Functions > Function Activation > Pretreatment > “Yes” Pretreatment activation during free cooling Configuration >...

  • Page 24: Cooling Recovery Mode

    Version Document Preliminary 003 Access V4.X Configuration manual Cooling recovery mode Activation of cooling recovery mode enables use of exchanger and damper sequences for reusing cool extract air. Configuration > Functions > Temperature control > Cooling recovery mode > “On”...

  • Page 25: External Setpoint Device

    Version Document Preliminary 003 Access V4.X Configuration manual The function can be used for “Cascaded room temperature control”, “Cascade connected extract air temperature control”, “Outdoor compensated room temperature control” as well as “Outdoor compensated extract air control”. An alarm will be triggered if “Extra controller” is in manual position or if a sensor error occurs.

  • Page 26: Fan Control

    Version Document Preliminary 003 Access V4.X Configuration manual 2.3 Fan control Fan control type Configuration > Functions > Function activation > Fan control type > Pressure During pressure control, two separate signals are used for supply and extract air and two separate analogue input signals for supply and extract air for pressure transmitters.

  • Page 27: Fan Configuration

    Document Preliminary 003 Access V4.X Configuration manual air fan output is made to follow the extract air fan control signal. A scaling factor can be added if the supply air fan characteristics are not the same as the characteristics of the extract air fan (only pressure control of the extract air fan is possible using this function).

  • Page 28: Fan Levels

    Version Document Preliminary 003 Access V4.X Configuration manual When running variable speed drive-controlled fans, the pressure signal from each respective fan’s pressure transmitter is normally used as run indication signal. If the pressure or flow falls below the set value during normal operation, a malfunction alarm is activated.

  • Page 29: Extra Fan Motor Control

    Version Document Preliminary 003 Access V4.X Configuration manual Extra fan motor control Configuration > Functions > Extra fan motor control Motor control 1 • None • Motor protection • Run indication Mode motor control 1 • Only Digital input •...

  • Page 30: Humidity Control

    Version Document Preliminary 003 Access V4.X Configuration manual 2.4 Humidity control Humidity control can be configured as Humidification, Dehumidification or both Humidification and Dehumidification. Activation: Configuration > Functions > Function Activation Configuration: Configuration > Functions > Humidity/Dehumidify Settings: Data & Settings > Humidity controller Two humidity sensors can be connected, a room sensor for control and an optional duct sensor for maximum limiting.

  • Page 31: Co2 Control

    Document Preliminary 003 Access V4.X Configuration manual If a start signal is needed for a cooling unit or a magnetic valve for DX dehumidification, the digital output signal “Start P1-Cooling” should be used. In this case, the “pump” stop delay should be set to 0 s.

  • Page 32: Enthalpy Control

    Version Document Preliminary 003 Access V4.X Configuration manual Configuration > Functions > Function activation > Heating/Cooling sequences > Recirculation 2 > CO2 control > CO2 sequence 2 If just supply air fan is used for recirculating mixed air, the extract air fan should be slowed down to keep balance of fresh and exhaust air flows.

  • Page 33: Starting Up And Stopping The Unit

    Version Document Preliminary 003 Access V4.X Configuration manual 3. Starting up and stopping the unit The unit can be put into operation using schedule, extended running switch, forced recirculation switch or if conditions for free cooling are met. It is possible that few running modes are active at the same time.

  • Page 34: Extended Running

    Version Document Preliminary 003 Access V4.X Configuration manual 3.2 Extended running Digital inputs can be used to force the unit to start although the timer says the running mode should be “Off”. Configuration > Functions > Function Activation > Extended operation > “Yes”...

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