FUNCTIONAL TEST aSENSE VAV
Contents
1. 4 1 blocks To each of the 4 outputs 4 of the available functions can be addressed so that the sum or the largest value is transformed to an output signal The Out 1 and Out 2 outputs can be limited within defined MIN and MAX values These MIN and MAX values can be set updated from the push button menu under operation Functional description in detailed block diagram form installation manuals etc are available on the Internet Document Rev Page 2 18 SESENSEA Ir Cooling demand with set point Out 1 Control signal Pst ae Max Temperature MIN Set Point Set Point 1 Set Point 2 Figure 2 The control signal of the cooling demand with set point Air demand with set point Out 1 amp Out 2 Control signal MAX Set point Carbon dioxide MIN 600 900 ppm Figure 3 The control signal of the air demand with set point Temperature Compensation of demand control LIMIT uncompensated 17 18 degrees C Figure 4 The control signal of the temperature compensation with LIMIT set point 5 C Heating demand with dead zone to set point Out 4 Set point Temperature 18 20 23 degrees C Figure 5 The control signal of heating demand with 3 C dead zone to the set point Forced ventilation With delayed effect Out 1 amp Out 2 control signal 2 7 shorted MAX demand control delay 0 20 minutes Figure 6 The control signal of forced ventilation with delay timer Document Rev2. Page 3 18 SESENSEA ir Air demand ON OFF Out 3 relay closed open 500 600 ppm Set point Carbon dioxide Figure 7 The control signal of air demand with set point Terminal Standard Standard settings Standard Configuration of Settings of this configuration function this sensor sensor Out 1 0 10VDC 600 900 ppm CO Air control 23 24 C alt 1 Cut off 18 17 C Out 2 0 10VDC 600 900 ppm CO Air control alt 2 Relay Closed gt 600 ppm CO Air control Open lt 500 ppm CO alt 3 owa o tovoc 2o18 0 Heat contro a Table I Default configuration of aSENSE VAV Function description in details with all parameter settings is in a separate document Formulas for calculation of output values Configuration Output Range Formula for calculation 0 10 VDC 0 2000 ppm CO CO value Volt 10 2000 0 50 C Temperature value in C Volt 10 50 0 2000 ppm CO CO value Volt 2 8 2000 0 50 C Temperature value in C Volt 2 8 50 0 2000 ppm CO CO value mA 4 2000 16 Temperature value in C mA 4 50 16 Value reading a b a d c c a lowest value of the configuration b highest value of the configuration c lowest value of the range d highest value of the range Table II Calculation of CO value and temperature value for aSENSE VAV Document Rev Page 4 18 SESENSEA ir Output Configurations A label on the inner side of the sensor lid shows the configuration of the output
3. a test gas with carefully determined concentration of COz must be used For zero calibration pure nitrogen or air that has passed through a chemical absorber should be used The Zero Calibration bag can be used to produce carbon dioxide free air Check the COs value of the display or the voltage of the output with a multimeter when the value has stabilized Document Rev Page 14 18 SESENSEA ir This is for sensors with measuring ranges between 0 3000 ppm and 0 4 When a zero calibration shall be executed a plastic tube with 2 2 mm outer diameter and 0 8 mm inner diameter shall be inserted in marked holes of the sensor A plastic tubing is connected to the tube The gas flow should be between 0 3 and 1 0 l min Figure 15 Part of the PCB with holes for gas inlets marked Self diagnostics The system contains complete self diagnostic procedures A full system test is executed automatically every time the power is turned on For aSENSE VAV the internal voltage regulators and outputs are checked In addition constantly during operation the sensor probes are checked against failure by checking the valid dynamic measurement ranges These different system checks return error bytes to the system RAM If any error is detected the yellow LED will be lit until the error has vanished and the error flag is reset Warm up and Out of Range are the only bits that are reset automatically after return to normal state All other error bits have
4. by stepping with MENU button Decreasing is set point done by stepping with the ESC button Document Rev Page 7 18 SeSENSEA Ir The present CO set point set point is increased by stepping with MENU button Decreasing is done by stepping with the ESC button First step of adjusting the analogue outputs MAX and MIN values Select analogue output by stepping with MENU button Leads to adjustment of the MIN value The present Increase the MIN value by stepping with the MENU button MIN value in Decrease by stepping with the ESC button The output is set to the MIN value and can be checked with a multimeter The present Increase MAX value by stepping with the MENU button Decrease MAX value in by stepping with the ESC button The output is set to the MAX value and can be checked with a multimeter Background calibration CO sensor calibration with fresh air An easy way to correct the zero point error The sensor needs fresh air 380 420 ppm CO The calibration must be confirmed by pressing Entr Confirm that a background calibration shall be done CAL yes Zero point calibration of the CO sensor The sensor needs zero gas See the zero point calibration instruction The calibration must be confirmed by pressing Entr a n Confirm that a zero point calibration shall be done Table IV Maintenance functions available on aSENSE VAV to set output limits Time limit refers to an
5. internal time out that returns the LCD and maintenance function back to normal ENTER is a simultaneous pressing on MENU and ESC PLEASE NOTE If a power failure happens when the sensor has Out 1 4 locked to min max limits then the sensor will have this output locked when the power returns lt is necessary to enter this menu item and release the output manually Document Rev Page 8 18 SeSENSEA ir EXAMPLE I Setting of the MAX value of the analogue outputs The access code is time limited If the time limit is exceeded the sensor returns to DEFAULT ENTR MENU and ESC are pushed simultaneously 1 Atthe start of the setting the sensor is in DEFAULT 2 Push MENU once to reach the error code The display shows E the error code number No error is shown as E000 3 Push MENU once The display shows the temperature set point e g 20 4 Push ENTR once The display shows EC and two digits Enter the access code to the service menu If the default code is used do like this Push MENU until the digits stop The display shows EC55 If the correct code is not entered before the time limit exceeds the sensor returns to DEFAULT 5 Push ENTR once The display shows SP t to set the temperature set point 6 Push MENU once to reach the carbon dioxide set point The display shows SP C 7 Push MENU once to reach the setting of analogue outputs The display shows AOUt 8 Push ENTR to reach the
6. is set The display shows SP t Push ESC to return to DEFAULT Display modes Mafnienance Function LCP contents functions menu exechied ete LOD texts DEFAULT CO amp temperature C alternating MENU Error code MENU be 3 Se po ENTR the sence menu Defaut code 255 11111111 Figure 13 Push button selection for setting the temperature set point MENU B 7 Increase set point set point p EETAA KETEFA ery Decrease 4 ENTR Document Rev Page 11 18 SESENSEA ir EXAMPLE III Setting of set points for temperature and carbon dioxide concentration the MAX and MIN values of the analogue outputs and calibration of the sensor The access code and the recalibration of the sensor are time limited If the time limit is exceeded the sensor returns to DEFAULT ENTR MENU and ESC are pushed simultaneously 1 Atthe start of the setting the sensor is in DEFAULT 2 Push MENU once to reach the error code The display shows E the error code number No error is shown as E000 Push ESC to return to DEFAULT if requested 3 Push MENU once The display shows the temperature set point e g 20 0 C and the carbon dioxide set point e g 750ppm 4 Push ENTR once The display shows EC and two digits Enter the access code to the service menu If the default code is used do like this Push MENU until the digits stop The display shows EC
7. push buttons MENU and ESC located on the front panel behind the flip down lid The YELLOW LED will acknowledge a successful push by a short flash Wait until the LED is turned off before next push The push button MENU is available for selection of display value or maintenance commands whereas ESC is available to escape back from a selected level pret i i TELL E Figure 8 The sensor with push buttons l Figure 10 The push button MENU is pushed Figure 11 The ENTER command is done by pushing buttons MENU and ESC at the same time for about 14 seconds Display modes In DISPLAY MODE the DEFAULT operation is that the sensor alternates between temperature and carbon dioxide readings presentation The push button MENU is used to select the indicated value on the display to be the error code or the set points Document Rev Page 6 18 SESENSEA ir of temperature and CO The display will always return to the Default display mode after power up If a permanent change of default values is requested the PC software is to be used Function Display Time Function description Line limit Temperature no DEFAULT Normal operation CO EXXX Error code If no error has been detected the code EO is shown The error code is reset with Entr 2 Present no Toggle between display of temperature and CO set point with temperature MENU and CO set points Table III On the display without entering the main
8. software version 4 3 and higher Resets automatically after source of See Note 1 error disappearance Memory Error Check detailed settings and configuration operations Is always set after power up or power check power stability failure Resets after restart sequence Note 1 Any probe is out of range Occurs for instance during over exposure of CO sensor in which case the error code will automatically reset when the measurement values return to normal Could also indicate the need of zero point calibration A background calibration using push button function bCAL will cure this error a more exact zero calibration using CAL may be performed later if required If the CO readings are normal and still the error code remains the temperature or relative humidity sensor can be defect or the connections to these are broken Remark If several errors are detected at the same time the different error code numbers will be added together into one single error code Maintenance The aSENSE VAV is basically maintenance free An internal self adjusting calibration function takes care of normal long term drift associated to the CO2 sensor To secure the highest accuracy a time interval of five years is recommended between COz calibrations unless some special situations have occurred A zero calibration can be performed by use of the push button functions or for a complete overview by use of a PC together with the U P soft
9. 55 If the correct code is not entered before the time limit exceeds the sensor returns to DEFAULT 5 Push ENTR once The display shows SP t to set the temperature set point 6 Push ENTR once The display shows the temperature set point e g 20 0 C Push MENU to increase the set point value in steps of 0 2 C Push ESC to decrease the set point value in steps of 0 2 C 7 Push ENTR once when the set point is set The display shows SP t Push ESC to return to DEFAULT 8 Push MENU once to reach the carbon dioxide set point The display shows SP C 9 Push ENTR once The display shows the carbon dioxide set point e g 750 ppm Push MENU to increase the set point value in steps of 50 ppm Push ESC to decrease the set point value in steps of 50 ppm 10 Push ENTR once when the set point is set The display shows SP C Push ESC to return to DEFAULT 11 Push MENU once to reach the setting of analogue outputs The display shows AOUt 12 Push ENTR to reach the output to be set The display shows An and two digits e g An 01 Step to the requested output by pushing MENU Document Rev Page 12 18 13 14 15 16 17 18 SeSENSEA ir Push ENTR to reach the setting of the MIN value The display shows Set L Push ENTR to set the MIN value of the output The display shows the numerical value in e g the standard setting 0 0 or previously set value Push ME
10. Gas and Air Sensors SENSEAIL User Manual aSENSE VAV CO temperature sensor with built in general purpose controller General The IAQ sensor product aSENSE VAV is used to measure indoor air carbon dioxide concentration and temperature It is a very flexible controller with programmable outputs for both relay and linear control of e g mixed air dampers humidifier and fans The measured values are shown on the display The linear output functions are pre programmed for different ventilation strategies for stand alone control The units can alternatively be connected to common VAV Variable Air Volume controllers or Direct Digital Control DDC All functions can be modified from a PC with the RS232 communication cable Figure 1 aSENSE VAV Document Rev Page 1 18 SESENSEA ir FUNCTIONAL DESCRIPTION This part describes the function of the standard configuration of aASENSE VAV Please note that the four outouts may completely or partly have other functions These functions may be programmed before or after the installation To be sure that every unit is correctly programmed in accordance to the actual application a check by a PC and the standard UIP software version 4 3 or higher is necessary Out 1 Out 2 and Out 3 are pre programmed alternative outputs for demand controlled ventilation Out 4 is intended for connection to a heat activator If requested Out 1 control signal of demand of coolness an
11. NU to increase the MIN value Push ESC to decrease the MIN value Push ENTR The display shows Sure Push ENTR to save the setting and return to Set L Push MENU or ESC to return to Set L without saving the new setting Push MENU to reach the setting of the MAX value The display shows Set H Push ENTR to set the MAX value of the output The display shows the numerical value in e g the standard setting 100 0 or previously set value Push MENU to increase the MAX value Push ESC to decrease the MAX value Push ENTR The display shows Sure Push ENTR to save the setting and return to Set H Push MENU or ESC to return to Set H without saving the new setting Push ESC to return to the output to be set item 12 Push ESC once again to return to the setting of analogue outputs item 11 Push MENU to reach the calibration with fresh air The sensor needs fresh air air with 400 ppm carbon dioxide The display shows CALb Push ENTR The display shows Sure Push ENTR to confirm that a background calibration should be done After completed background calibration the sensor returns to DEFAULT If a background calibration should not be executed push MENU or ESC The background calibration has a time limit Push MENU to reach the zero point calibration The sensor needs carbon dioxide free air or gas The display shows CAL Push ENTR The display shows Sure Push ENTR to conf
12. d air quality with reduced flow by extreme cold Out 2 control signal of demand of air quality Out 3 ON OFF of demand of air quality Out 4 control signal of heat demand Set point values of temperature air cooling and heating and air quality CO2 can be adjusted individually by the unit s maintenance push buttons The different functions with associated outputs are seen in figures 2 7 When a set point value is changed the control curves of that parameter are parallel displaced Out 1 controls both air quality and temperature but temperature overrules so if the temperature sinks below the LIMIT value the air supply is cut down Two different gain alternatives can be used in the temperature cooling feed back loop In alternative 1 the P band is 1 degree and in alternative 2 the P band is 2 degrees see figure 2 Temperature compensation of the demand control is done for temperatures below LIMIT value see figure 4 The standard configuration of aSENSE VAV with its settings is typical in many Variable Air Volume VAV applications Even other control parameters can be programmed from the UIP software There are a number of different regulator blocks available 6 programmable P bands linear functions with associated set points 2 additional general purpose P bands plus 1 timer function regulator controlled by the DI1 terminal are available In addition the different regulator outputs may be mixed together using 3 multiplexer
13. irm that a zero point calibration should be done After completed zero point calibration the sensor returns to DEFAULT If a zero point calibration should not be executed push MENU or ESC The zero point calibration has a time limit Document Rev Page 13 18 SESENSEA ir FUNCTIONAL TEST aSENSE VAV Functional test The unit has two LED s yellow and red on the front panel found under the front lid These LED s indicate the status of the controller Figure 14 The aSENSE VAV with LEDs push buttons and display Yellow LED Call for maintenance is lit if an error flag is set or the measurement is out of range This information is also shown on the display by the wrench icon Any push button press or executed maintenance function is acknowledged by emission from this LED Red LED Relay active is lit when the relay is activated contact closed A simple and visual functional test can easily be performed Take a breath and blow the air from a distance of a few centimetres on the sensor The sensor will detect a rapid increase in the carbon dioxide concentration The red LED is lit when the CO2 concentration goes above the pre set value If the sensor is connected to a controller the flow of the ventilation system will eventually increase by change of the fan speed or Opening of a damper actuator depending on the installation application Test gas verification If the measurement of a sensor is to be verified
14. its are set in the very same way Function blocks that are time limited are indicated by blue boarders Time limit refers to an internal time out that returns the LCD and maintenance function back to normal ENTER is a simultaneous pressing on MENU and ESC Document Rev Page 10 18 ook SESENSEA ir EXAMPLE Il Setting of temperature set point The access code and the recalibration of the sensor are time limited If the time limit is exceeded the sensor returns to DEFAULT ENTR MENU and ESC are pushed simultaneously At the start of the setting the sensor is in DEFAULT Push MENU once to reach the error code The display shows E the error code number No error is shown as EOOO Push MENU once The display shows the temperature set point e g 20 Push ENTR once The display shows EC and two digits Enter the access code to the service menu If the default code is used do like this Push MENU until the digits stop The display shows EC55 If the correct code is not entered before the time limit exceeds the sensor returns to DEFAULT Push ENTR once The display shows SP t to set the temperature set point Push ENTR once The display shows the temperature set point e g 20 0 C Push MENU to increase the set point value in steps of 0 2 C Push ESC to decrease the set point value in steps of 0 2 C Leave the unit which returns to DEFAULT after a delay or push ENTR once when the set point
15. ment Rev Page 18 18
16. output to be set The display shows An and two digits e g An 01 Step to the requested output by pushing MENU 9 Push ENTR to reach the setting of the MIN value The display shows Set L 10 Push MENU to reach the setting of the MAX value The display shows Set H 11 Push ENTR to set the MAX value of the output The display shows the numerical value in e g the standard setting100 0 or previously set value Push MENU to increase the MAX value Push ESC to decrease the MAX value Push ENTR The display shows Sure Push ENTR to save the setting and return to Set H Push MENU or ESC to return to Set H without saving the new setting Push ESC to return to the output to be set item 12 Push ESC once again to return to the setting of analogue outputs item 11 Document Rev Page 9 18 SESENSEA ir Display modes Matnienance Function LCD contents functions ment exectied with LOLO texts DEFAULT ENTR CO amp temperature C alternating z 4 MENU Error code MENU L SAVE MENU ESC ENTR ENTR ENTR Increase output Access code to number e MENU the serice menu The i a MAX june ze Default code 255 value MAX 11111111 _ value Figure 12 Maintenance functions available on aSENSE VAV to set output limits Only flow shart for setting High limits are shown but Low lim
17. riod of twenty four 24 months following receipt by Buyer the Product supplied by SenseAir to Buyer will be under normal use and care free from defects in workmanship or material and to be in material conformity with senseAlr s specifications Units returned to SenseAir for warranty repairs shall be shipped to SenseAir at Buyer s expense according to SenseAir s instruction Within ninety 90 days of the receipt of product SenseAir shall replace or repair such units and shall ship them to Buyer s designated return destination freight pre paid 2 Warranty Limitations This warranty does not extend to any unit that has been subject to misuse neglect or accident that has been damaged by causes external to the unit that has been used in violation of SenseAir s instructions that has been affixed to any non standard Accessory attachment or that has been modified disassembled or reassembled by anyone other than SenseArr 3 The retailer is not responsible for any consequential loss or damages which may occur by reason of purchase and use of this product The warranty is in any event Strictly limited to the replacement repair of the product This product is in accordance with the EMC 2004 108 EC 92 31 EEG including amendments by the CE marking Directive 93 68 EEC The product fulfils the following demands EN 61000 4 2 level 2 EN 61000 4 3 level 2 EN 61000 4 4 level 4 EN 61000 4 6 EN 61000 4 8 level 4 EN 55022 class B C Docu
18. s at the time of product delivery A label at the inner side of the top part shows the terminals and jumpers The sensors controllers are supplied from the factory unless otherwise ordered with 0 10VDC linear outputs for Out 1 2 amp 4 see Table Il If different output configurations are needed for the application these have to be reconfigured before the unit is powered up Each jumper selection is independent from the others Default values are 0 10 V and 0 20 mA Alternative measuring ranges and other start point can be selected in the PC software Jumper for selection Jumper top position provides 1 C as P band cool range of P band cool range Jumper bottom position provides 2 C as P band cool range Current Connection in position Current provides 0 4 20mA output range for Out 1 Voltage Connection in position Voltage provides 0 2 10VDC output range for Out 1 Current Connection in position Current provides 0 4 20mA output range for Out 2 Voltage Connection in position Voltage provides 0 2 10VDC output range for Out 2 Voltage Connection in position Voltage provides 0 10VDC for Out 4 Open Connection in position Open collector provides an open collector output collector Max 0 5A 55VDC 40VAC half wave rectifier Table II Configuration jumpers for aSENSE VAV Document Rev Page 5 18 SESENSEA Ir Push Button Operation for aSENSE VAV This sensor has two
19. tenance menu Maintenance level A number of execution options are available from the MAINTENANCE MENU see Table IV This level is accessed only from the display mode in the set points of temperature and CO selection A two buttons push and an access code restrict access intended for competent trained service personnel only The Entr command is done by PUSHING MENU AND ESC AT THE SAME TIME hold down for about 15 seconds The access code has eight binary digits one press at MENU equals 1 and one press at ESC equals 0 The code value can be changed for your personal choise from the software UIP 4 0 The menu diagram in detail is shown in the appendix Always use the ESC button to return to the DEFAULT mode Several pushes of the ESC button may be needed to return to the DEFAULT mode The Entr push MENU amp ESC eventually leads to execution of functions which causes temporary or permanently change of any parameter that affects the system outputs Function Display Time Function description Line limit 3 ECxx y Access code to the service menu The default value of the code is 255 11111111 that is eight presses on MENU Press down MENU and let it scroll until it stops The last two digits of the code are shown Then ENTER to accept the selected code es SPt For setting the temperature set point S 4b The present ye For increase decrease of the temperature set point The set temperature point is increased
20. to be reset manually after return to normal state either by pushing MENU amp ESC buttons simultaneously for Entr or by power off and restart By pushing the push button MENU the error code number Exxx is shown on the LCD Descriptions of the different codes are listed below The yellow LED flashes if an error has been detected If a fatal error has been detected the yellow LED is lit Document Rev Page 15 18 SeSENSEA ir Error code and action plan code Fatal Error eee to restart sensor by power OFF ON Yellow LED continuously flashes Push buttons are not le e Reserved o m Error rio restart ON O to restart sensor by power OFF ON Indicate wrong EEPROM Check detailed settings and configuration configuration with UIP software version 4 3 and higher Contact local distributor Output Error Check connections and loads of outputs Detected errors during output signals Check detailed status of outputs with UIP calculation and generation software version 4 3 and higher Self Diagnostic Error Check detailed self diagnostic status with May indicate the need of zero UIP software version 4 3 and higher calibration or sensor replacement Contact local distributor Out of Range Error Try sensor in fresh air Accompanies most of other errors Check connections of temperature and Can also indicate overload or failures relative humidity probe of sensors and inputs Check detailed status of measurements with UIP
21. ware version 4 3 or higher This software can be free downloaded from www senseair com A RS232 cable is needed and can be ordered from SenseAir The cable is to be connected to the UART port slide connector Fig 15 For change of control parameters and re calibration CO2 and temperature this PC tool has to be used The check can be done on site without interfering with the ventilation system Document Rev Page 16 18 SESENSEA Ir UART 5 lt 5 0000o oo ee UART x FHF R LLL O oQ D o O oS Figure 17 The aSENSE VAV printed circuit board with COs sensors for measuring ranges 0 3000ppm 0 10 och 0 25 PCBs with long temperature sensors are for duct mounting Relay 5 6 7 8 Out 2 R T m alt 5V D RXD R alt2 TXD Digital P band Input jumper Out 1 Out 2 Out 4 Figure 18 The connection terminal area of the aSENSE VAV printed circuit board Document Rev Page 17 18 SeSENSEA ir WARRANTY AND LIMITATION OF LIABILITY 1 SenseAir warrants that for a pe
Download Pdf Manuals
Related Search