BTU XT-70 User Manual
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BTU XT-70 User Manual

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Manual XT-003.5 Copyright BTU
Ventilation 2013

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Summary of Contents for BTU XT-70

  • Page 1 Manual XT-003.5 Copyright BTU Ventilation 2013...

  • Page 3: Xt-70 Control Panel

    XT-70 Control Panel FORWARD The new XT Series Control Panel from BTU Ventilation is built from the ground up for the 21st century farm manager. Simplicity of operation, combined with sophisticated on-board data analysis and internet communica- tions make this a control panel of the future.

  • Page 4: Table Of Contents

    Web Java Setpoint Ramp ……………………………………………………. 7.10 Web Java Fan Speed Control ……………………………………………….. 7.11 Web Java Humidity Control …………………………………………………. 7.12 Web Java Miscellaneous …………………………………………………….. 7.13 Web Java Switch Control ……………………………………………………. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 5 Appendix E: XT Sensor Measurements .…………………………………………... Appendix F: XT CO Management ….………………………………………………... Appendix G: XT Potato Dehumid …..….……………………………………………... Appendix H: XT HMI Records …………………………………………………………. Appendix I: Sweet Potato Operation ………………………………………………... BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 6 Note - The Aux 1, Aux 2, and cavity heater can be set to be interlocked with the Start / Stop switch, mechanical Low Temp and Air Restriction devices or to operate independently. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 7 <BWD keys. For example, pressing the label TEMP SP on the home screen will directly bring up the Tempera- ture Setpoint Ramp screen. Pressing the <HOME> key on any screen will go directly back to the first general screen (the home screen). BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 8: Xt Control Module

    The Aux 1, Aux 2 and Cavity outputs can be set for supervision or act independently of the Start/Stop switch and system safeties. Typical Ethernet Network Connections Remote PC Remote HMI INTERNET Local HMI XT Panel 01 Router Local PC XT Panel 02 BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 9: Operational Modes

    If target is < 32.0 or > 76.7, the alarm is triggered. If pile diff selection > 8, the alarm is triggered. If Start differential > 50 or < -50, the alarm is triggered. BTU VENTILATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 10 Cooling / CO2: The system is in Cooling and the CO level is above The CO2 setpoint. The return air heaters are active to help open the doors and purge the BTU VENTILATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 11 In Potato mode, the return air heater is used to dehumidify. Refrig / Dehumid: This is an Onion mode. The system is in a normal Refrigeration mode and the burner is being run on low fire. BTU VENTILATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 12 CO level greater than the high setting. The system must be in a valid operating mode. There is a programmable timer associated with this alarm. BTU VENTILATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 13 This is an Onion alarm. The program has detected a failure with one of the four pile sensors that are being used. See the sensor configuration to determine which sensors are being used. There is a programmable timer associated with this alarm. BTU VENTILATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 14: Xt Hmi Operation

    Care should be used when cleaning the screen not to scratch it. A clean soft cloth and a mild glass cleaner should be used to clean the screen, . BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 15: Status Screen

    DOOR OPEN: This displays the amount of fresh air that is being brought into the storage. It is a value from 0 to 100 percent. This is a important value and will be active in the Refrig/CO2 mode. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 16 Once the correct user name and password is entered, the key will change to UnLocked UnLocked. To lock the system again, press the UnLocked key. GRAPHS This button will advance to the real time graphs module and the activity log. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 17 HUMIDITY CONTROL SCREEN CO2 CONTROL AND MISC SCREEN OUTSIDE AIR CONTROL SCREEN FRESH AIR DOOR CONTROL SCREEN FAN SPEED CONTROL TEMPERATURE DEVIATION SCREEN REFRIGERATION CONTROL SCREEN RUN TIME CLOCK SCREEN BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 18: Password Screen

    User is authorized to view and to make control parameter changes. Level 3 Configure User is authorized to view, to make control parameter changes and to make system configuration changes. Web Interface User Authorization Screen BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 19 Each pile sensor can be individually named. This is done through the web interface and can be done remotely by the dealer. When the names of the pile sensors are changed, the names will appear on all of the records and also on the web pages. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 20: Time Clock

    This mode will not run refrigeration or a timed run. If COOLING hours are pro- COOLING grammed and there is no cooling air available, the system will go into Standby mode. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 21: Outside Air Control

    Timed mode. If cooling air becomes available, the system will continue to run in Refrigera- tion only. The Timed mode would activate only if the Refrigeration mode was not available or if the refrigeration switch is not in Auto. HMI OUTSIDE AIR CONTROL: BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 22 MCR time will guarantee that the system will stay in cooling for the duration of the MCR timer. Thus, if the MCR is set to 5, the system would have to run in Cooling mode for a minimum of BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 23 The FORCE REFRIG button can be used to force the system into a refrigeration mode. The time clock must be set to allow refrigeration. Once the system is in refrigeration, it will run for the minimum refrigeration time. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 24: Deviation Alarms

    Auto Reset, by checking this box the high dev alarm will be reset in the Cooling if it trips in either Refrigeration or Timed Run. If it trips during the Cooling mode, it will remain locked out. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 25 With these values, the setpoint would increment or decrement towards the target .1° every 6 hours of Cooling or Refrigeration runtime. The ramp function can be used to either increment or decrement the setpoint. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 26: Fan Speed Control

    Once the system runs the amount of time equal to the UPDATE setting, it will either increment or decrement the fan speed by 5%. It looks at the top and bottom of the pile and compares it to the PILE DIFF setting. If the calcu- BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 27 Note - the fan boost percentage will also be the fan percentage when in a Cooling CO2 Purge cycle. The fan boost can be active or disabled. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 28: Humidity Control

    The XT panel guards against these issues by having a failsafe Off mode of operation. An On time should always be programmed in. This On time acts as a minimum setting for the humidifiers. Thus, even if the humidity is BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 29 The cell will turn on only when needed for cooling and then turn off when it gets cool enough outside to provide enough cooling without evaporative cooling. After selecting the desired mode, press SAVE. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 30: Miscellaneous

    All timers are set in the E2 parameter screen, accessed using the middle left outside button. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 31 Do not go over 20%. Use the buttons to set up the desired maximum outside air temperature, length of purge, the frequency of the purge and the fan speed during purge. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 32 The CEILING switch is used to turn on the Heat when the outside air drops below a preset temperature. Current Aux 4 and 5 are spares and are not used. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 33 Auto position. The remote off position is used to turn devices off from a remote location, either from the HMI or the web interface. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 34: Fresh Air Door Status

    HMI Fresh Air Door Status: Fresh Air Door Status: Using BTU SDX “Smart Door Controls”, accurate door position, individual door statuses and any door failures can be displayed and incorporated into the XT historical data and alarming system. A very flexible strategy allows for up to eight fresh air doors to be set up in almost any layout scheme.
  • Page 35 For a defrost cycle, the fresh air doors will go full closed and the return air will circulate and defrost the doors. After the defrost cycle, the doors will operate as normal. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 36: Test Mode

    To change an output, press the appropriate cell. The fan output must be set to On for the fan speed and refrigeration level to be active. To change the REFRIG and FAN output, press the button and type in the appropriate percentage. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 37: Graphing Module

    When downloading the number on the right will indicate the number of records being downloaded. If that remains at zero or hangs up click on Cancel to stop the download. When finished it will display the graph. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 38: 5.17 Activity Log

    Return to go back to the main screens. The record format can be changed by cus- tom building a csv file. See appendix A for information on changing the records for- mat. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 39: Refrigeration Interface

    Pressing the RESET button for any of the devices will cause a reset of that card to occur. This can be used to reset an alarm. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 40: E2 Memory Setup

    5.19 E2 Memory Setup: The XT-70 panel uses two types of memory to retain operating parameters. The main programmable parame- ters accessible on the HMI screens are flash parameters. The parameters are stored on a removable XD picture card. The other control parameters are saved on the E2 memory of the P1 processor. You must have the high- est level of security to change these values.

  • Page 41: E2 Parameters 6.1 E2 Definitions

    For this variable to be active, the OSA needs to be above the start temperature. This setting is in 1/10ths of a degree. The default setting is 3, or .3°. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 42 Cell Pump Failure Timer. When the cell pump is given a signal to start, this timer will start timing and will be reset once the cell is proven. If the pump fails BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 43 Minimum Refrigeration Run. This setting will allow the refrigeration to run for a minimum time, regardless of cooling air availability. Default setting is 30 minutes. KP_1 Refrigeration proportional gain. The default value is 20. Increasing this value BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 44 This value is in 1/10’s of a degree. The default setting is 5 or .5°. Burner Start is a Onion parameter. This is the percentage that the gas valve BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 45 Pulse control will cause the open output to produce a open pulse and the close output to produce a close pulse. A setting of 1 will configure the outputs for BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 46 Heater on and off. The amount of time On and time Off will change as needed to maintain a steady plenum temperature. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 47 The Pile Humidity Config is a Onion parameter and applies to the MVG onion program only. This parameter is used to determine which of the pile humidity sensors is used for control. 1 = Pile 1H 2 = Pile 2H BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 48 14 = Average of Pile 1 & 4 23 = Average of Pile 2 & 3 24 = Average of Pile 2 & 4 34 = Average of Pile 3 & 4 BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 49 Calibration constant for PILE 4 sensor. Example - lower value by .6 F. Enter -6 for the value. Example - increase value by 1.6F. Enter 16 for the value. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 50 -6 for the value. Example - increase value by 1.6 %. Enter 16 for the value. Calibration constant for CO2 sensor. Example - lower value by 6 ppm. Enter -6 for the value. Example - increase value by 16ppm. Enter 16 for the value. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 51: Xt Web Interface

    Refrig, Setpoints, Alarm Reset, START and STOP buttons. The JAVA CONTROL is much easier to use for making monitoring and making changes to the XT panel. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 52: Web Refrigeration Interface

    The Setpoints page contains all the main parameters for the operation of the panel. First make changes and then click on the Submit button. Next click on the Save Changes button. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 53 To make change click on desired parameter value, change the number and then click on submit. Then click on Save. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 54 HMI screens. To change the Temp SP, click on the yellow box and a key pad will be displayed. To make a change, enter the new value and then click on Enter. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 55 This will force the fans and all devices off. COOL ONLY System will run only when cooling air is available. System will run COOLING, REFRIG, OR TIMED REF ONLY System will run in REFRIG only. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 56 It is a count down timer that is active when ever the plenum is below the setting. When the timer counts to zero it will trigger the alarm. The HDT is a similar timer for the High Deviation. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 57 The Setpoint Ramp screen allows the ramp to be set up just like the HMI screen. 7.10 The Fan Speed Control page allows all setting for the speed of the Fan. See section 5.9 for more information. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 58 7.11 The Humidity screen allows all the humidity parameters to be set. See section 5.10 for more information. 7.12 See section 5.11 for more information on the Miscellaneous screen. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 59 5.12 for more information. 7.14 The Fresh Air Door Status screen allows the user to see the exact status of each door. See section 5.13 for more information. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 60 Next enter the Start Date and End Date for the records. Click on the Retrieve Records button. A pop up screen should allow you to select Excel spread sheet for the download. See appendix for more information. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 61 OPTION RELAY TO DRIVE START THE PUMPS ARE PULSED ON AND INPUT OFF. GREEN YELLOW LIGHT LIGHT LIGHT UPS CONNECTION 120VAC male plug 120VAC female plug 120 VAC PANEL POWER BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 62: 120 Vac Field Wiring

    EVAP HUMID 1 HUMID 2 RETURN PUMP 120VAC 120VAC 120VAC PUMP PUMP HEATER RELAY RELAY 120VAC STARTER STARTER AUX 1 CAVITY 120VAC 2120VAC 120VAC STARTER STARTER STARTER SYSTEM NEUTRAL BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 63 AN9 S AN10 AN11 AN12 OUTSIDE HUMIDITY PLENUM HUMIDITY RETURN HUMIDITY RETURN CO2 HUMIDITY SENSOR HUMIDITY SENSOR HUMIDITY SENSOR CO2 SENSOR 4-20MA 4-20MA 4-20MA 4-20MA AN13 AN14 AN15 AN15 BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 64 0-20MA RESTRICTION REFRIG TEMP 0-20MA NOTE - LOW TEMP IS SHOWN IN NORMAL CONDITION. SHORT CIRCUIT MUST BE ON TOP TWO PINS FOR PANEL TO COME OUT OF SHUTDOWN. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 65 60%. Thus if the outside humidity was less than 60% the system would determine that the air is dry enough. If the outside humidity was greater than HMAX then the system would have to go to the BURNER mode. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 66 DEHUMID MODE This branch looks to see if the system is already in a dehumid mode, if so it will look to see if it can terminate the dehumidification. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 67 RTH H => HSP The system will terminate the dehumid mode when the return humidity drops below the humidity setpoint. See Onion Flow Chart on the following pages: BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 68: Onion Flow Chart

    CPH < HMAX TEMP TIME CLOCK OPEN FRESH AIR BURNER SW TIMED MODE DOOR TO 100% AUTO CURE MODE BURNER MODE CPH < HMAX MOD DOORS WITH HUMIDITY PID BURNER MODE BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 69 CPH < HMAX AUTO BURNER SW REFRIG MODE COOLING MODE AUTO RTH H => DEHUMID MODE COOLING MODE RTN H > COOLING MODE OSA < COOLING MODE SP -De_diff DEHUMID MODE BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 70 General: The XT-70 control panel up to 25 parameters to be chosen to use for records. Not only can the specific parameters to use be chosen, but so can the order of the records. The XT-70 will save 78,000 records and then will rollover when full by deleting the oldest record and replacing it with a new one.
  • Page 71 <record index> <humid sp - reference only> <record index> <cooling sp - reference only> <record index> <refrig sp - reference only> <record index> <timed sp - reference only> <record index> BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 72 TARGET CO2 SP HUMID SP COOLING SP REFRIG SP TIMED SP Timestamp OPERATION MODE SECONDARY MODE SETPOINT PLENUM T START OUTSIDE T 4/2/2009 0:00 WARMING 39.7 40.2 60.1 91.9 BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 73 Suction Temp B Super Heat SP Super Heat SP A Super Heat SP B Super Heat A Super Heat B Valve pos A Valve pos B Mode Mode A Mode B BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 74 The format for the last two days records is http://<ip address>/records_2days.csv The format for the last seven days records is http://<ip address>/records_7days.csv For example, to retrieve the last two days of records for an XT-70 panel at 192.168.1.55 at HTTP port 4005, the request would be: http://192.168.1.55:4005/records_2days.csv To load these records in an Excel spreadsheet, do a file open and use that address for the “File name:”...
  • Page 75 The best way to start is with the BTU Potato Template.xlt file. Open this file (it may take a while to timeout if it is not pointed toward any data). The first thing to do is to point it toward the correct XT panel.
  • Page 76 Thus when the graphs are set up, they have to be inclusive of just the data. The BTU template can easily be modified it for a specific application. Chart 1 is a dual axis graph and has temperatures on the left side and output percentage on the right side.
  • Page 77 Example: to request records from a panel with an IP address of 192.168.1.55, HTTP port 4005, start date 4-3-09 and end date of 4-4-09, send the following request: http://192.168.1.55:4005/records.csv?a=4&b=3&c=2009&d=4&e=4&f=2009&g=1&h=0 BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 78: Appendix B: Xt Diagnostics Port

    Type in a name such as Rabbit Test. Click on OK Select the proper Comport for the PC. Set the Baudrate and other parameters as shown. Rabbit software above 2.1.0 requires 115kb Click on OK. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 79 == D8DA calc_crc == D8DA HTTP server Initialized Authorizations Initialized Record Task is not OK Some of the valuable parameters displayed are the IP address, the port and the panel number informa- tion. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 80: Appendix C: Xt Purge Cycles

    APPENDIX C: XT PURGE CYCLES Theory This application note will describe each of the seven purge cycles of the XT-70 panel. 0 = No Purge cycles 1 = Time Purge, no ARL or CO2 2 = ARL (Ambient Reverse Loading), no CO2 or Time Purge 3 = ARL &...
  • Page 81 To use this configuration, set the following E2 parameters: Purge_Cnfg = 2 Ref_Level (ROL) default setting = 30% ROL_Diff default setting = 5% Low_Cutout default setting = 5 tenths of a degree Max_Door default setting = 20% BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 82 = 5 tenths of a degree Max_Door default setting = 20 % ROL_Start_Dly default setting = 10 minutes CO2_Diff default setting = 200 ppm CO2_RAS default setting = 5 tenths of a degree BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 83 To use this configuration, set the following E2 parameters: Purge_Cnfg = 4 Aux 1_Config = 1 Purge_cnfg = 5 ERV / CO2: (Energy Recovery Ventilator with CO2 Sensor) The ERV purge uses a ventilator BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 84 If outside air is less than 40 degrees, initiate a purge cycle for 15 minutes every 6 hours and run the fans at 85%. If the XT panel is in cooling, the return air heaters will be turned on for BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 85 Purge_Cnfg = 6 Max_Door default setting = 20 % Set the following Main flash parameters: CO2 SP this is the CO2 Setpoint. A suggested value would be 2000 ppm. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 86: Appendix D: Xt Warming Mode

    2 switch will then control the WARMING mode. If the Aux 2 switch is in the Off position, the panel will run normally. Switching the Aux 2 to Auto will activate the Warming mode. For normal operation, set the Aux 2 config equal to zero. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 87: Appendix E: Xt Sensor Measurements

    3.925 16435 3.448 4757 2.483 68765 3.920 15994 3.433 4619 2.454 66419 3.914 15552 3.417 4481 2.424 64073 3.908 15111 3.401 4377 2.401 61727 3.901 14670 3.383 4272 2.377 BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 88 0.356 1700 1.454 0.721 0.350 1662 1.433 0.710 0.343 1624 1.411 0.698 0.338 1586 1.389 0.687 0.333 1547 1.367 0.675 0.328 1509 1.344 0.664 0.323 1471 1.321 0.652 0.318 BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 89 XT-70 Control Panel Convert VDC to Humidity Humidity % = (VDC - .8)*31.25 Convert VDC to CO ppm = (VDC - .8)*3125 BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 90: Management

    Cooling mode. Pulse Width Amount of time, in milliseconds, for each door open or close pulse. Update Time Amount of time, in seconds, between each door open or close pulse. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 91 This average time is used to determine door position if the system is not equipped with BTU SDX (Smart Door Controls). Max Door Open Maximum allowable door opening, in percent, during CO control.
  • Page 92 Goto Time CO2 Mode = CO2 < CO2 > CO2 SP Cooling CO2 SP - Diff Heat OFF Heat OFF Goto ARL Heat Switch Door > Heat ON Auto Max Door BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 93 SP = SP + CO2 PLEN RISE RUN PID HEAT CO2 < MODE = Door = 0 % MODE & CO2 PURGE CO2SP - DIFF SP = SP - CO2 PLEN RISE BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 94 Back to Start Timed ZZ Hours Door Closed Pulse Fresh Air CO2 > CO2 SP OSA < XX Doors to Max Open Hours > ZZ for XX minutes Door Closed BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 95 MIN EVERY HOURS Back to Start Hours Mode = Timed Hours > ZZ Mode = OSA < XX Refrig Aux 1 Switch Auto Aux 1 on for YY minutes BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 96 Aux 1 Sw CO2 < CO2 > CO2SP Refrig = Auto CO2 SP - DIFF Mode = AUX 1 = ON AUX 1 = OFF Timed Back to Start BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 97: Appendix G: Xt Potato Dehumid

    THAT ONCE YOU ARE IN THE MODE YOU WILL STAY THERE TURN RETURN FOR THE LENGH OF THE AIR HEATER ON MCR EVEN IF THE OSA WARMS COOLING / DEHUMID RESET THE MCR TIMER BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 98: Appendix H: Xt Hmi Records

    Date. This will give you the records from mid- night to present. If you want to change the inter- val use the spinner buttons. Click on the Download button to get the records. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

  • Page 99: Appendix I: Sweet Potato Operation

    Start temperature then the system will run in Cooling. If the Outside air is greater than the Start temperature then the system will run in Warming. When the Aux 2 switch is off, then the system will run in Cooling only. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 100 5% every update until the temperature goes below. If the Heat switch is on the heat will come on if the plenum temperature drops below the SP minus the heat diff. This purge would typically be used without heat. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 101 MCR (minimum cooling run) will clear and the system will go back to Standby. MAIN LOOP Mode = Time Clock = CO2 > Force Cooling Standby Cooling Only CO2 SP RETURN BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 102 Heat on for YY minutes to purge the storage. Mode = OSA < XX Refrig Pulse Fresh Air Doors to Max Open for XX minutes BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 103 This will greatly enhance the cooling run time available. Once the pile is down to the long term storage setpoint, the reference should be changed to Setpoint. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 104 CO2 exceeds the setpoint the fresh air doors will gradually open up to the max doors set- ting. As soon as the CO2 drops below the CO2 Setpoint minus the CO2 Diff, the doors will gradually go closed. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 105 20%. The Timed button is the percentage at which the intake fans will start. The Aux 1 switch needs to be in Auto for the intake fans to run. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...
  • Page 106 The Aux 1 switch controls the intake fans. If the switch is in auto, the intake fans will start when the exhaust fans reach a given percentage. BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btucorp.com...

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