Danfoss MCX08M User Manual
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Danfoss MCX08M User Manual

Air handling seq. control algorithm
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MAKING MODERN LIVING POSSIBLE
Air handling Seq.
control algorithm
Software version 2.1
REFRIGERATION &
AIR CONDITIONING DIVISION
Danfoss Electronics spa
User manual

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Summary of Contents for Danfoss MCX08M

  • Page 1 MAKING MODERN LIVING POSSIBLE Danfoss Electronics spa Air handling Seq. control algorithm Software version 2.1 User manual REFRIGERATION & AIR CONDITIONING DIVISION...

  • Page 2: Table Of Contents

    12.4| Fans lock Air quality control Alarms 14.1| Actions following an alarm 14.2| Types of reset 14.3| Alarms table Parameters DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 3 17.1| Guide to modifying the application software 17.2| “Parameters” Page 17.3| “Alarms” Page 17.4| “Parameters_x_Model” Page 17.5| I/O configuration pages DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 4: Introduction

    MMIMYK accessory, select the configuration to download onto the MCX on a case-by-case basis. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 5: User Interface

    Passing from OFF to ON turns on the main screen. Activating of the digital and analog outputs is delayed, respectively, by the dOt and AOt times DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 6: Main Screen

    The main screen varies depending on whether a LED or LCD display is being used. 2.3.1| LED Display Fig 1_[User interface - LED display] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 7: Lcd Display

    A” and “display B” for the version with LED display); » the symbols of the main active functions (see figure). Fig 2 _ [User interface - LCD display] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 8: Menu-Based Navigation

    Unlock fans Winter Sets the winter operating mode Summer Sets the summer operating mode Tab 3 _ [User interface -Menu-based navigation] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 9: Displaying And Managing Alarms

    The level for a given menu and the parameters is defined through the Configurator software. “ AHU_Interface_vNN.xls”. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 10: Parameters

    If enabled through the Configurator software, makes it possible to access the input/output configuration screens. For each input/output for the instrument, it is possible to set the type, work field, polarity and function performed. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 11: Utilities

    Unlock fans Sub-menu: WIN – Winter Sets the winter operating mode. Sub-menu: SUM – Summer Sets the summer operating mode. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 12 Heat seq. 2 power Humidification power Cool seq. 1 power Recovery (Mixing) power Tab 5 _ [Menu-based navigation - Screen description] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 13: Configuring The Ahu Software

    Define the control type, the control probe and if necessary the PID control parameters. (See “12] Supply and return fans”). DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 14: Input/Output Configuration

    Lock Fan Lock/Unlock fans Comf/Eco Comfort/Economy selection FreeHeatCool Freeheat/Freecool changeover Tab 7 _ [Configuring the AHU software - Digital Inputs] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 15 Controls the ON/OFF valve of coil 3 Valve3Open Controls opening of 3-point valve of coil 3 Valve3Close Controls closing of 3-point valve of coil 3 DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 16 Defrost Defrost activation HeatRequest Request of heating CoolRequest Request of cooling Tab 9_ [Configuring the AHU software - Digital Outputs] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 17: Coils Control

    As described in detail in “6.2| Heat and cool control sequences”, coils are controlled with heating and cooling control sequences according to the following figure. Fig 5 _ [Coils control - Heat and cool sequeces for coil] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 18: Coil Output Management

    (e.g. electric resistances). In this case there are 3 possible way of control: linear step switch, variable step switch binary step switch. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 19: Valve Control

    4.3.1| ON/OFF and 0/10V valve control Fig 7 _ [Coils control - ON/OFF and 0/10V valve control] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 20: Point Valve Control

    4% position will cause the valve to fully close and a request for 96% will cause it to open all the way. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 21: Step Control

    Linear step control is described in the following figure in case of 2 steps. Up to 3 steps are managed. Fig 8 _ [Coils control - Linear step control] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 22: Variable Step Switch

    1000 17,0 Step 3 ON 1000 50,0 Step 3 OFF 1000 33,0 Tab 15_ [Coils control - Variable step switch] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 23: Binary Step Switch

    Binary Step control is described in the following figure in case of 2 steps. Up to 3 steps are managed. Fig 10 _ [Coils control - Bianry step control] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 24: Locking Sequences

    Heating lock -40,0 100,0 90,0 °C Tab 17_ [Coils control - Locking sequences] Fig 11 _ [Coils control - Locking sequences] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 25: Pumps Control

    The “ice” blinking icon signals this function. Fig 12 _ [Coils control - Pumps winter start] (See “9] Frost protection” for further actions to prevent frost.) DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 26: Single Heat/Cool Coils

    Fig 13 _ [Coils control - Comparison between probe HC1 and Setpoint HC2] *Summer/Winter selection has influence over the way of controlling fans. (See “12.1 Type of supply and return fans”). DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 27: Cooling Coil Defrost Control

    “HRE – HeatRequest” is ON when the load demand from Heat Sequence 1 or 2 is greater than 0. “HCE – CoolRequest” is ON when the load demand from Cool Sequence 1 is greater than 0. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 28: Dampers And Energy Recovery Control

    External Damper Mixing Damper 0/10V analog output External Damper Tab 23_ [Dampers and Energy recovery control - External and Mixing dampers] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 29: On/Off Dampers

    “CSE - ExtDamp Closed” and “CSR - MixDamp Closed signals that the damper is closed and, at the same time, the damper control is active for at least 3 seconds. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 30: Energy Recovery

    Fig 18 _ [Dampers and Energy recovery control - Energy recovery] (See “4.6] Pumps control” ) for how to control the recovery pump. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 31: Temperature Control Sequences

    See above for possible values. D04: offset of the freecool setpoint. D05: offset of the freeheat setpoint. D06: proportional band for the proportional control. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 32: Freecooling/Freeheating Selection

    For granting a minimum amount of fresh air , it is possible to define a minimum opening of the external damper with D10. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 33: Heat And Cool Control Sequences

    H14, C04, H24: proportional band of the PID control. H15, C05, H25: integral time of the PID control. H16, C06, H26: derivative time of the PID control. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 34 Fig 21_ [Temperature control sequences - Heat sequence 2] Fig 22_ [Temperature control sequences - Cool sequence] * the previous figures are displayed positive values of the offset. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 35: Connection Of Setpoint Sequences

    In the next figure you can see the result of setting D02=FRH: setpoint of Freecool Sequence connected to the Freeheat Sequence. Fig 24_ [Temperature control sequences - Setpoint of Freecool sequence connected to the freeheat Sequence] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 36: Main Setpoint

    By enabling the economy mode, the main temperature setpoint are changed by ES2 and ES3 quantity. The Active Temperature Setpoint (ATS) becomes: ATS=STH+ES2 in heating ATS=STC+ES3 in cooling DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 37: Local Setpoint

    Through parameters D02, D03, H12, H22, C12, they can be assigned to the specific sequence, (see “6] Temperature control sequences”). DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 38: Cascade Control

    Calculated setpoint are then used by the control sequence to control the supply temperature. Fig 27_ [Cascade Control - SUP Supply Temperature] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 39: Examples

    H11 – control probe = tH1 (preheat probe) H12 – setpoint selection = FRH (connected to the freeheat sequence) Fig 29_ [Examples - Preheating coil] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 40: Example 2

    C11 – control probe = SUP (room/supply control in CASCADE) C12 – setpoint selection = FRC (connected to the freecool sequence) DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 41 Air Handling seq.- user manual Danfoss Electronics spa Fig 32_ [Examples - RET Return Temperature] Fig 33_ [Examples - SUP Supply Temperature] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 42: Frost Protection

    OFF FP4 with PI logic. This function acts on both the heat sequences but the heat recovery and the external damper remain closed. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 43: Controlling The Supply Temperature Limits

    Operation in dehumidification mode Limitation is ON/OFF as described in the figure Fig 36_ [Controlling the supply temperature li- Operation in dehumidification mode] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 44: Supply Temperature Upper Limit

    (free-heating) are limited in a manner proportional to amount the supply temperature differs from the limit setpoint. Above the setpoint, the limitation is total Fig 37_ [Controlling the supply temperature li- Supply temperature upper limit] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 45: Umidity Control

    Dehumidification prop. 20,0 band Dehumidification integral 9999 time Dehumidification derivative 9999 time Tab 33_ [Humidity control - Humidity control regulation] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 46: Control Sequences

    HumidPump analog output Humidifier Tab 34_ [Humidity control - Humidifier control] Fig 40_ [Humidity control - Humidifier control] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 47: Dehumidifier Control

    – Dehumidifier “and analog output “DHU – Dehumidifier”. Fig 41_ [Humidity control - Dehumidifier control] activating the cooling coil (see “11.3.1] Cooling coil in dehumidification”). DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 48: Cooling Coil In Dehumidification

    If tC1 probe is not present, cooling coil is activated at 100% till there is request of dehumidification Fig 43_ [Humidity control - Cooling coil in dehumidification 2] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 49: Controlling The Supply Humidity Limits

    Band 10,0 Supp. humidity high limit ;NO;YES enable Band 10,0 Tab 37_ [Humidity control - Controlling the supply humidity limits] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 50: Upper Limit

    HL4. The behavior mirrors what follows for the upper supply limit. Fig 47_ [Humidity control - Lower limit] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 51: Supply And Return Fans

    “SFH - SupplyFanHigh. ” – is activated as indicated in the figure (delta contactor) Then the analog output “SUF - Supply Fan” is used, activated in a manner proportional to the demand. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 52 As with the supply fan, the outputs used to control the return fan are the digital outputs “REF - Return Fan”, “RFL - REt. Fan Low Sp. ” , “RFH - REt. Fan High Sp” and the analog output “REF - Return Fan”. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 53: Fan Speed Configuration

    To allow the damper to open, the return fan is activated after a delay RF4 has elapsed after the AHU is started up. Then is delayed of the RF5 time when the unit is turned off. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 54: Fans And Antifreeze

    12.4| Fans lock Is possible to lock/unlock fans through the digital input “LOF-Lock Fan” or through the user interface (see “2.4.5] Utilities”). DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 55: Air Quality Control

    A setpoint for CO2 control is defined in P03 with its relative differential P04 and a setpoint for the VOC control is defined in P05 with its relative differential P06. Fig 50_ [Air quality control - Air quality control] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 56: Alarms

    Supply fan alarm “SupFan Alarm” (automatic) External Digital input Supply fan damper locked “ExtDamp (automatic) Closed” and output “External Damper” active DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 57 Probe open or Actuators 5 fault short circuited (automatic) involved Analog Input Probe open or Actuators 6 fault short circuited (automatic) involved DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 58 (automatic) involved Analog Input Probe open or Actuators 16 fault short circuited (automatic) involved\ Tab 40_ [Alarms - Alarms table] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 59: Parameters

    The parameter display and modification mode is accessed from the Menu. For a complete description of the user interface, (see ”2] User interface”). 15.1| Parameters table See the Configurator software “AHU_Interface_vNN.xls” for the list of parameters. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 60: Modbus Communication

    External Damper closed ON/OFF ON/OFF Fire Alarm Fire alarm Freeze Alarm Freeze alarm Summer/Winter Summer/Winter selection Supply Flow Supply flow alarm DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 61 Controls step 1 of coil 2 Coil2Step2 Controls step 2 of coil 2 Coil2Step3 Controls step 3 of coil 2 DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 62 Freeze alarm 0=OFF, 1=ON Fire alarm 0=OFF, 1=ON Supply air flow alarm 0=OFF, 1=ON Return air flow alarm 0=OFF, 1=ON DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 63 0 (0000 0000 0000 0001) -> Digital output 1 bit 15 (1000 0000 0000 0000) -> Digital output 16 DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 64 Heat1 Probe Heat2 Probe Cool1 Probe Humid Probe Recovery Req. Power Ext. Damper Req. Power Heat1 Req. Power Heat2 Req. Power DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 65 Cascade set heat 16651 Cascade set cool 16652 Reserved 16653-16657 Heating1 Req. Power B1 16658 Heating1 Req. Power B2 16659 DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 66 AI Temp Air Return 16697 AI Temp Air Supply 16698 Tab 43_ [Modbus Communication - Table of exported variabiles 2 ] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 67: Appendix – Use Of The Configurator

    (“Text Values” column) » it is also possible to have the parameter disappear by writing “K” in the “K” column. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...

  • Page 68: Alarms

    » For the active probes, it indicates the input full scale measurement value. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 69 If “Filter=1” the analog input measure is not filtered. The measure is faster but less stable. If “Filter=128” filter is at its maximum. Suggested values goes from 1 to 16.. DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 70 [Modbus Communication - Table of exported variabiles 2 ] Tab 44_ [APPENDIX - I/O configuration pages e.g.1] Tab 45_ [APPENDIX - I/O configuration pages e.g.2] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 71 [Supply and return fans - Type of supply fans] Fig 49_ [Supply and return fans - Fan speed configuration] Fig 50_ [Air quality control - Air quality control] DKRCC.PS.RI.A1.02 / 520H4358 - Air Handling Seq. user manual - V 2.2 Produced by Danfoss Electronics spa Graphic Department, 10-2009...
  • Page 72 Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.

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