SystemAir Access V4.X Configuration Manual Download Page 12 | Manualshive

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SystemAir Access V4.X Configuration Manual Download Page 12

Version

Document

Preliminary 003

Access V4.X Configuration manual

11 (33)

2019-05-13

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.

Position

Heating

Cooling

Start
Heating

Start
Cooling

Name

SEQ-A

2

Off

50% 0%

0%

Heating

SEQ-B

1

1

0%

0%

Exchanger

SEQ-C

Off

2

0%

-25% 0%

Cooling

SEQ-D

Off

Off

0%

0%

Recirculation 1

SEQ-E

Off

Off

0%

0%

Recirculation 2

SEQ-F

Off

Off

0%

0%

Fan heating/cooling

SEQ-G

Off

Off

0%

0%

Heating 2

SEQ-H

Off

Off

0%

0%

Cooling 2

SEQ-I

Off

Off

0%

0%

Exchanger extract

SEQ-J

Off

Off

0%

0%

Extra heating/cooling capacity

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Summary of Contents for Access V4.X

Page 1: ...Access V4 X Configuration manual EN Document in original language 153830 A001 ...

Page 2: ...2 Configuration 8 Configuration steps 8 Temperature control 9 Temperature control types 9 Heating Cooling sequences 10 Step controller 18 Changover settings 19 Support control 19 Free cooling 21 Pretreatment 22 Summer winter mode 22 Cooling recovery mode 23 Extra controller 23 External setpoint device 24 Fan control 25 Fan control type 25 Fan configuration 26 Fan levels 27 Fan compensation 27 Extr...

Page 3: ...4 X Configuration manual 2 33 2019 05 13 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 32 Extended running 33 External stop 33 ...

Page 4: ...are to stop the air handling unit for maintenance e g filter exchange change the time for extended run and change the temperature setpoint Operator mode Log in with 1111 Read and write privileges except Configuration Service mode Log in with 0612 Full read and write privileges Date and time ACCESS controller has a year base clock function The clock has an automatic summertime wintertime change ove...

Page 5: ...hernet HMI and EFX display and four terminals for internal and external bus communications Int link 1 and Int link 2 are parallel and designated for internal bus communication Int link 1 and Int link 2 terminals correspond to Port 3 in the menu BMS terminal corresponds to Port 2 in the menu Ext link terminal corresponds to Port 1 in the menu Ethernet for connecting to local TCP IP network HMI for ...

Page 6: ...l EXOline master Connection to expansion units and Pressigo pressure transmitters Modbus slave Connection to BMS via Modbus RTU Modbus master Bus communication to components inside AHU BACnet MSTP slave Connection to BMS via BACnet MSTP External display Connection to touch display EFX master communication to expansion units via EFX protocol Message format For proper communication the right message...

Page 7: ...m settings Communication devices The Access controller supports up to 20 devices connected via communication BUS Modbus and EXOline Only limited number of predefined device models is supported List of supported brands and models Device type Fan FC Modbus Rotary exchanger Modbus Pressure transmitter Modbus EXOline Actuator Modbus Expansion unit EXOline Model Vacon RHC200 PDTxxC Modbus Belimo E8 Len...

Page 8: ...p2 Exchanger 1 Exp2 Cooling 1 Exp3 Cooling 1 Exp3 Recirculation 1 1 Exp4 Recirculation 1 1 Exp4 Recirculation 2 1 Exp5 Recirculation 2 1 Exp5 Fan heating cooling 1 Exp6 Fan heating cooling 1 Exp6 Heating 2 1 Exp7 Heating 2 1 Exp7 Cooling 2 1 Exp8 Cooling 2 1 Exp8 Exchanger extract 1 Exp9 Exchanger extract 1 Exp9 Extra heating cooling capacity 1 Exp10 Extra heating cooling capacity 1 Exp10 Recircul...

Page 9: ...path Select function to activate e g Heater 2 cooler 2 Support control Free cooling fire function etc Activation Configuration Functions Function Activation How the function should be designed e g Electric water frost protection fire damper etc Configuration Configuration Functions Select I Os for activated function e g AO2 DI4 DO6 UI4 Allocation Configuration I O allocation How the function will ...

Page 10: ... signal generates the supply air controller s setpoint value The room controller uses an own PI loops 1 4 room sensors can be connected The average value of selected sensors is used in the control loop Extract air cascade Cascade control of extract air temperature and supply air temperature to achieve a constant settable room temperature The extract air controller output signal generates the suppl...

Page 11: ...quences The supply air temperature is adjusted by controlling the output signals for AHU s components by regulating corresponding sequences Up to 10 sequences with separate PID control settings can be used Each sequence can be set for Heating Cooling Exchanger Damper Pressure flow compensation or set as Not used For standardization all 10 sequences have predefined names to cover the most frequent ...

Page 12: ...sequence overlap while positive starting point will delay start of the selected sequence Position Heating Cooling Start Heating Start Cooling Name SEQ A 2 Off 50 0 0 Heating SEQ B 1 1 0 0 Exchanger SEQ C Off 2 0 25 0 Cooling SEQ D Off Off 0 0 Recirculation 1 SEQ E Off Off 0 0 Recirculation 2 SEQ F Off Off 0 0 Fan heating cooling SEQ G Off Off 0 0 Heating 2 SEQ H Off Off 0 0 Cooling 2 SEQ I Off Off...

Page 13: ...Configuration Functions Function activation Heating Cooling sequence setup Step controller For combined heating cooling changeover option for connecting two sequences can be configured Configuration Functions Function activation Heating Cooling sequence setup Changeover settings Heating Water heating When the unit is in running mode the heating valve is controlled by the analogue output and digita...

Page 14: ... mode when the running mode switches to Off The Standby mode will control the heating output to maintain a constant settable temperature at the frost protection sensor Setpoint Standby mode Electric heating Control The heating is controlled using the analogue output and or signal for start heating or step controller to control 1 4 digital output steps Overheat protection On Activate of the digital...

Page 15: ...ol signal The number of steps is equal to the number of heater chiller groups Minimum on and off times can be set i e the minimum time the step has to be inactive or active for a change to occur Binary control The heater power outputs should be binary weighted 1 2 4 8 The number of loads to be controlled is set Thereafter the program will automatically calculate the individual Activate levels Swit...

Page 16: ...ure DX cooling can be blocked when the outdoor temperature is low It is possible to block the three cooling steps individually or to block all DX cooling The temperature limits are adjustable 13 C default and have a fixed one degree hysteresis When two DX cooling steps are used with binary function the cooling effect is divided into three steps The desired blocking level can be set individually fo...

Page 17: ...emperature This represents both the minimum time that the function should be active the supply air fan and extract air fan compensation as well as the minimum time before the next prevention cycle should begin While the cycle is active Defrosting is shown in the NaviPad Plate Control The airflow through the exchanger is controlled by a shut off damper and a by pass damper Both dampers are controll...

Page 18: ...ler Section Defrosting Module SDM and dampers dividing the exchanger into sections Maximum of 5 damper configuration 4 exchanger 1 bypass can be implemented The SDM is controlled by the main controller s signals Digital output Defrosting start and Analog output Exchanger control If defrosting is required a digital output on the main controller is activated The function ends if differential pressur...

Page 19: ...troller Configuration Functions Function activation Heating Cooling sequence setup Step controller Two operation modes for step controllers are available Sequential control Each output step has individually settable on and off values in percent of the control signal The number of steps is equal to the number of heater chiller groups Minimum on and off times can be set i e the minimum time the step...

Page 20: ...angeover 1 2 is normally used Open contact gives heating control and closed contact gives cooling control If the input has not been configured change over is handled by the internal controller signal The output signal AO changeover 1 2 and DO changeover 1 2 will follow the two regular output signals Heating and Cooling For heating control the digital outputs Heating SEQ A start or SEQ A pump are a...

Page 21: ...onfigured to start only with the supply air fan In this mode the extract air fan is not active This requires a digital output to be configured which controls the recirculation damper to open completely so the supply air fan can circulate the air to and from the room The digital output is called recirculation damper Support control heating Demand for support control heating is when the room tempera...

Page 22: ...utes to ensure that the temperature measurement when using an extract air sensor reflects the corresponding room temperature and that the outdoor temperature sensor senses the outdoor temperature even if it is placed in the fresh air inlet duct If the outdoor sensor is not located in the fresh air inlet duct and a room sensor is selected the unit will not start free cooling as long as all the temp...

Page 23: ...ting preheating will be aborted The same conditions apply to precooling i e if the intake temperature is not more than 1 C adjustable cooler than the outdoor temperature precooling will be aborted Pretreatment always starts at start up of the unit if the outdoor temperature so permits If pretreatment is aborted due to a small difference between the intake temperature and the outdoor temperature pr...

Page 24: ...oller Heating Cooling An independent temperature control circuit for control of for example after heaters The circuit can be configured to heating or cooling It has an analogue input signal for temperature sensors and an analogue output signal 0 10 V There is also a digital output signal which is activated when the analogue output signal is above 1 V and deactivated when the analogue signal is bel...

Page 25: ...roller is in manual position or if a sensor error occurs Settings Data settings Temperature control Supply air controller Setpoint extra controller 18 C Temperature extra controller Actual value for Extra temperature controller External setpoint device An external setpoint device e g TBI PT1000 or TG R4 PT1000 can be connected The setpoint device must follow the PT1000 resistance curve The unit is...

Page 26: ...extract air fan does not have a pressure transmitter instead you let the output for the extract air fan follow the control signal for the supply air fan A scaling factor can be added if the characteristics of the extract air fan are not the same as the characteristics of the supply air fan Only pressure control of the supply air fan is possible using this function The extract air fan will start di...

Page 27: ... fan Fan configuration The controller supports number of Modbus communication capable fans Such fans can be controlled over internal bus of the unit Alternatively the fans can be hardwired to signal terminals of the controller and controlled directly Depending on preferred fan control type several configuration options are available Configuration Configuration Functions Fan control The air handlin...

Page 28: ...ut configured as motor protection should be normally open i e closed contact when the motor is running i e motor control output is activated will generate an alarm Fan levels The controller supports up to three operation speeds Low Normal and High Configuration Functions Function Activation Fan levels After activating operation speed levels the setpoint for each fan and each level can be set Data ...

Page 29: ...ol 1 None Motor protection Run indication Mode motor control 1 Only Digital input Normal time channel Extra time channel 4 Stop delay motor control 1 0 s Motor control 2 None Motor protection Run indication Mode motor control 2 Only Digital input Normal time channel Extra time channel 4 Stop delay motor control 2 0 s Data Settings Fan control Extra fan motor control ...

Page 30: ...re output signal will be damped Dehumidification An analogue output is used to control a dehumidifier The output will increase on increasing humidity A digital output can also be used to start a dehumidifier Humidification dehumidification An analogue output is used to control a humidifier The output will increase on decreasing humidity The cooling output Y3 will be activated for dehumidification ...

Page 31: ...sation The fans will stop when the CO2 value falls to a settable hysteresis default 160 ppm below the start value Data Settings Demand control CO2 Mixing damper function Configuration Functions Function Activation CO2 control Mixing damper function Activation of recirculation function is required for visual representation of the mixing damper in the flowchart Configuration Functions Function Activ...

Page 32: ...gy content of the air taking into consideration both the temperature and the air humidity The value is given in energy per kilogram air kJ kg If enthalpy control is configured enthalpy is calculated both outdoors and for the extract air If the enthalpy is higher outdoors than in the extract air the recirculation damper function will be overridden to increase the recirculation The function is not a...

Page 33: ... that speed that day For 24 hour running set a period to 00 00 24 00 If you want to run the unit from one day to another e g from Mon 22 00 to Tue 09 00 the desired running time for both days must be entered If the unit shall run at that speed during the holiday period it can also be scheduled here There can be up to three independent schedules one for each fan speed in use If on off recirculation...

Page 34: ...or extended running switch Configuration I O allocation settings Digital inputs If momentary switch is used to activate the function the time for extended operation can be set Time settings Extended operation stop delay Then time is set to 0min the unit will only run if the digital input is closed 3 3 External stop The External stop signal will stop the unit even if the timer or any of the extende...

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