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BTU VENTILATION CORPORATION ● OFFICE 888-884-8070 ● FAX 218-346-7485 ● www.btuvent.com

XT-Micro Control Panel

18

CRX Modes:

The XT Panel operates in two modes: the main operation mode and a secondary mode. De-

pending on the setup of the alarms, it is possible to continue running in an alarm mode.

For example, for a cell pump failure, the secondary mode would indicate a cell pump failure, send out the alarm,
indicate an alarm (a blinking red light) but continue to run in Cooling or Refrigeration. Wetbulb calculation would
be shut off.

3.0

CRX Modes of Operation

Main Operation Modes:

Shutdown:

Shutdown is activated by the Stop/Start switch set to the Stop position.

Standby:

Standby can only be activated with the time clock set to standby or

with no outside cooling available during Cooling mode.

Cooling:

Cooling mode can only be activated with outside cooling air available

and time clock set to either Cooling or Refrigeration mode.

Refrig:

Refrigeration mode will be activated when cooling air is not available

and the time clock is set for Run or Ref Only.

Recirc

Recirc will be activated when the time clock is set to Recirc, there

is no outside cooling air available and the refrigeration switch is set to

Off.

Remote Stop:

Remote stop is activated with the Stop button from either the HMI

touch screen or web interface.

Low Temp:

The low temp alarm is triggered by the backup low temp safety

thermostat. It can only be reset with the Start/Stop switch.

Parameter Fail:

The Parameter fail is triggered by an out-of-range setting on one of the

critical parameters. If setpoint is < 32.0 or > 76.7, the alarm is trig-

gered. 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.

Remote Standby:

Remote Standby is activated by a contact closure across input IN4.

Typically used for off-peak power, ripple control or refrig defrost.

Alarm Standby:

Any alarm condition that was set to shut down the system.

Fan Fail:

The fan input IN1 did not get a closed contact within the fan fail timer

period. There is a programmable timer associated with this alarm.

Cooling / Purge:

The system is in Cooling and the return air heaters are being used to

force the fresh air doors open. This cycle has been triggered by time

and not the CO2 sensor.

Refrig / Purge:

The system is in Refrigeration and the fresh air doors are open to the

max door setting. This cycle has been triggered by time and not the

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Summary of Contents for XT Micro

Page 1: ...Manual CRX 001 2 Copyright BTU Ventilation 2010 XT Micro www btuvent com ...

Page 2: ......

Page 3: ...ty sensors CO2 sensor Central distributed time outside temp and humidity to multiple panels OPTIONAL FEATURES Color TPC touch screen interface for up to 10 CRX Bin Controllers TPC touch screen gateway to internet for remote control and polling of data Full internet web interface for 10 Bin Controllers using one RGX embedded web server RGX provides detailed records for up to 10 CRX panels using web...

Page 4: ...8 CRX Operation And Alarm modes 3 0 Operational Modes 17 3 1 Secondary Modes 19 CRX Operation 4 0 Outside Air Control 20 Purge Control 5 0 Purge Modes Theory 22 5 1 CO2 Flow Chart 24 5 2 Sensor Purge Flow Chart 25 5 3 Time Purge Flow Chart 26 BTU VENTILATION CORPORATION OFFICE 888 884 8070 FAX 218 346 7485 www btucorp com XT Micro Control Panel 4 ...

Page 5: ...p proving Dry contact Refrigeration Fail Dry contact Remote Standby Dry contact Low Temp SPDT contact Start Stop Dry contact CRX Sensors The CRX panel can accept a number of different input sensors and has 13 one amp outputs In addition there are two analog outputs that are 0 20mA or 0 10VDC The fresh air doors are controlled by two relay outputs XT Analog Outputs Freq Drive 0 20mA 0 10VDC Refrige...

Page 6: ...or indicating program mode Press the up and down arrows to change the parameter Use the left and right keys to move the cursor on multiple program screens Press the ENTER button when done to save and escape from the program mode 10 22 09 13 10 Refig Ramp Daily RT 2 6 Version 00 27 Temp SP 65 0 Plenum 65 6 Return 66 0 Pile 1 66 0 Pile 2 66 0 Pile 3 66 0 Door Pos 0 Ref Out 100 High Dev 5 Low Dev 5 T...

Page 7: ...0 End 24 00 Schedule 2 None Start 00 00 End 24 00 Schedule 3 None Start 00 00 End 24 00 Schedule 4 None Start 00 00 End 24 00 High CO2 2400 Timer 15 Program PID Values Cool P 50 Cool I 10 Cool D 20 Cool U 4 0 Ref P 20 Ref I 4 Ref D 10 Ref U 10 0 Filter 6 Program Timers Hi Dev 10 Lo Dev 5 Fan Fail 1 Cell Fail 1 Plen Sen 3 OSA Sen 3 OSA H Sen 3 High CO2 5 Plen Diff 1 5 Program Sys Timers CAT 10 MCR ...

Page 8: ... unique number Unit 1 Programmable Parameter Temp SP temperature setpoint This is the desired plenum temperature setpoint Press the ENTER button to change the setpoint Plenum is the current plenum temperature The plenum temperature is the average of two plenum sensors The two sensors are located on J7 and J10 Temp SP 65 0 Plenum 65 6 Return is the temperature of the return air and is on terminals ...

Page 9: ...tpoint for ramping down To turn the ramp function off set the Target the same as the Temp SP Ramp Hrs 24 Ramp Rt 0 1 Programmable Parameter This screen is part of the Setpoint Ramp function The Ramp Hrs is the number of hours the system will run before it makes a Setpoint change Once the system has run the Ramp Hrs the Setpoint will be incremented or decremented by the Ramp Rate A typical setting ...

Page 10: ...mer to 0 The timer is in minutes and the CO2 level would need to be higher than the SP for the amount of the timer to activate the alarm Once the alarm is activated the system would shut down The timer can also be a soft alarm which means that it will alarm but not shut the system down To set the timer soft the value must be neg Example a ten minute soft alarm would be 10 Press ENTER to change the...

Page 11: ...The Heat Diff is used when the plenum temperature drops below the temperature Setpoint If the plenum is less than SP Heat Diff then the return air heater will turn on This is a programmable parameter and can be changed by press ing ENTER This value is a positive number Programmable Parameter AxH Temp auxiliary heat The AxH Temp is a setpoint of aux heat The heat could be located any where in the s...

Page 12: ...t time for schedule 1 in military 24 hour time Set for the desire start time 00 00 is midnight Press the ENTER button to program the Start time Stop Schedule 1 This is the stop time for schedule 1 in military 24 hour time Set for the desired stop time Press ENTER to go into the program mode use the right arrow to Schedule 2 Recirc Start 23 00 Stop 02 00 Programmable Parameter Schedule 2 has priori...

Page 13: ... default value is 100 Increasing this value will slow down the entire loop decreasing will cause the loop and response to speed up Programmable Parameter Ref P Refrigeration proportional gain The default value is 20 increasing this value will cause the overall refrigeration system performance to be come faster P is most effective on sudden changes Ref I Refrigeration integral gain The default valu...

Page 14: ...rative Cooling pump fail timer This is a count down timer that starts when the cell pump is given the signal to start If the pump fails to start before the time counts down a alarm will be triggered Press ENTER and use the right key to move the cursor to the bottom line Timer is in minutes Both timers can be positive negative or shut off when set to zero Programmable Parameter Plen Sen Plenum Sens...

Page 15: ...e door position This value is determined by timing the door open cycle and door closed cycle The two values should be averaged The default setting is 180 seconds This is only used when the ram potentiometer is not available Press ENTER key and use the right key to position the cursor to bottom line to make changes Programmable Parameter Date Calendar Date This allows the date to be set Press the E...

Page 16: ...he desired output percentage to be entered Used the up and down arrows to change the percent age When done testing make sure to go back to Auto or Off The Auto position will al low the controller to turn the refrigeration on and off Press ENTER to change the posi tion Cavity Switch The switch has three positions Off Manual and Auto This switch con trols the output for the cavity heater Off Manual ...

Page 17: ...in the Start position In Auto the Aux switch will turn on and off when needed To change press the Enter button Climacell Man Climacell is the BTU name for the evaporative cooling cell This screen shows the status of the cell The Cell can be off auto or manual In manual the cell will run any time the fans are running In off the cell will not run In auto the cell can be used to control hu midity To ...

Page 18: ...s no outside cooling air available and the refrigeration switch is set to Off Remote Stop Remote stop is activated with the Stop button from either the HMI touch screen or web interface Low Temp The low temp alarm is triggered by the backup low temp safety thermostat It can only be reset with the Start Stop switch Parameter Fail The Parameter fail is triggered by an out of range setting on one of ...

Page 19: ...ed by time and not the CO2 sensor Cooling CO2 The system is in Cooling and the CO2 level is above The CO2 setpoint The return air heaters are active to help open the doors and purge the CO2 Refrig CO2 The system is in Refrigeration and the CO2 level is above CO2 setpoint The fresh air doors are being used to purge the CO2 Heat This mode is used to turn on return air heaters when the system is runn...

Page 20: ...r Fail The Outside Air Sensor Fail alarm is triggered by an out of range out side air sensor There is a programmable timer associated with this alarm Low Dev The Low Dev alarm will trigger when the plenum temperature drops below the low dev setting the timer has expired and the fans are run ning There is a programmable timer associated with this alarm High Dev The High Dev alarm will trigger when ...

Page 21: ...l material thickness amount of water and design can greatly affect how well the evaporative cooling will work The cell efficiency variable will help to compensate and give an accurate start temperature For example most cells produce a temperature drop of about 80 percent of the actual calculated wetbulb Thus if the calculated wetbulb is 20 and the cell_eff was set to 80 the adjusted wetbulb would ...

Page 22: ...enum Rise Above Setpoint The default setting for the RAS is 3 This is used to determine when cooling air is no longer available If the plenum temperature is higher than the RAS setting and the outside air temp is higher than the start temperature the system will terminate cooling Summary of Cooling Air Logic Cooling air available If OSA Start_T and CAT satisfied or if OSA 3 Start_T Cooling air not...

Page 23: ...ing a CO2 sensor If a sensor is not avail able then a purge cycle for cooling or refrigeration can be activated using the programmable time clock The type of CO2 purge is controlled using the Purge_cnfg variable This variable can be set to the following applications 0 No Purge cycles 1 CO2 Time Purge using Time Clock only 2 CO2 purge during Cooling or Refrigeration mode with CO2 sensor 3 Force Pur...

Page 24: ... When the heaters are on the returned air is heated should see approximately 3 degrees rise This will force the fresh air doors to open If the system is running in the Refrigeration mode the fresh air doors will gradually open up to the max door setting This is typically about 20 Once the CO2 level drops 200ppm below the CO2 Setpoint the fresh air doors will gradually close Purge_cnfg 3 This is a ...

Page 25: ...ration Control CO2 CONTROL TIME PURGE Purge_CFG 0 Purge_CFG 1 Goto Time Purge Purge_CFG 2 Goto Purge Control Mode Refrig Door Closed no yes no no yes yes Operating Parameters Door Time sec Max Door Open 0 100 Refrigating level REF CO2 Initial start delay minutes CO2 Diff Purge_CFG 0 No Time Purge or ARL CO2 1 Time Purge no CO2 sensor 2 CO2 Purge with CO2 sensor yes no Mode Cooling CO2 CO2 SP CO2 C...

Page 26: ... Micro Control Panel 26 Mode Refrig no Door Closed CO2 CO2 SP yes CO2 CO2SP DIFF RUN PID HEAT MODE CO2 PURGE SP SP CO2 PLEN RISE Back to Start Purge Control CO2 CONTROL Mode Cooling no yes MODE CO2 RUN PID HEAT MODE CO2 PURGE SP SP CO2 PLEN RISE Door 0 yes yes yes no no no yes no 5 3 ...

Page 27: ...o Start Time Purge Heat Switch Auto Mode Cooling Mode Refrig TIMED PURGE CONTROL Time for purge no no yes no Heat Off Mode Heat no yes Heat On yes no Mode Refrig no yes Door 0 yes no Run CO2 Purge SP SP CO2 Plen Rise Run CO2 Purge SP SP CO2 Plen Rise yes yes Force Purge Purg_CFG 3 no yes Force Cooling Limit doors to Max ...

Page 28: ...ires 24vdc power and an earth ground Make sure the polarity is wired correctly or the unit could be damaged The unit uses Com 3 for communications with the XT Micro cards Pin one is Data minus Pin two is Data plus Pin five is ground Initial Setup The TPC 66 requires a compact flash card for this operation Make sure the card is installed The card slot is on the top of the unit Open the door and sli...

Page 29: ...at is used to configure the VNC for remote monitor ing and control of the TPC WINVNC EXE this is the actual program for the VNC It runs in the back ground and is waiting for a remote connection Inf file format 04 xls this program is not needed and is only used as a guide in setting up the csv file for the TPC STEP 1 copy files Copy the above files onto a USB thumb drive Power up the TPC 66 with th...

Page 30: ...us ing for example only Tap on Edit and then Select all All the programs should now be highlighted Next tap on Edit and then on Copy Now tap on the back arrow This will take you back to the My Device screen Double tap on the Storage Card Tap on Edit and then on Paste The Storage Card should now have the following files In the future use this same procedure to update program and configuration files...

Page 31: ...vent com XT Micro Control Panel 31 STEP 2 start up menu Tap the Start button and then the Programs But ton Tap the Advantech on the far right at the arrow Tap on Configuration Utility Tap on the right arrow until the Misc tab shows up Tap on the Misc tab Tap on the Add button ...

Page 32: ...p on the keyboard icon and then on hide input panel to remove the keyboard Double tap on the TPC66 Refrig Interface file Tap on the Registry Save button to save the start up menu Tap on OK to exit configurator Power the TPC down and back up It should now start up the control program and show an error because no INF file has been selected ...

Page 33: ...tells the TPC which units to poll and how to decipher the data In this example the file is the TPC 66 CRX 02 rev B ver 04 This file could have any name assigned to it The name should reflect the equipment it is polling Tap on the LOG IN button Enter the appropriate log in There can be three different passwords The passwords are all set in the inf file The first two password allow view only The thi...

Page 34: ...485 www btuvent com XT Micro Control Panel 34 Tap on App and then on Set COM 3 Make sure that COM 3 is set for 19200 Tap on OK The main display should be up and communicat ing Step 3 IP address setup Tap on Start Settings and then Network and Dial up Connections ...

Page 35: ...indow is visible Tap in the ip window before typing Fill in the correct Subnet Mask and also the Default Gate way The default gateway has to be the IP address of the router Plug in a network cable and the network icon should become active Network icon Step 4 VNC Setup VNC is used for remote communications It allows the user to view the TPC using a web browser or VNC viewer on a cell phone At any t...

Page 36: ... FAX 218 346 7485 www btuvent com XT Micro Control Panel 36 Minimize the control program by tapping on the icon Double tap on My Device Double tap on Storage Card Double tap on the vncconfig icon Make sure the VNC Password Authentication is selected ...

Page 37: ...word Tap on the Connections tab and change the port settings to match this example Move the keyboard if necessary to allow tapping in the text window before typing Tap on OK Tap on Start Programs Advantech and Registry Saver Tap on X to close out the Storage Card directory Step 5 VNC Start Up Menu Tap on Start Programs Advantech and Configu ration Utility ...

Page 38: ...om XT Micro Control Panel 38 Tap on the right arrow to get to the Misc tab Tap on the Misc tab and then on the Add button Double tap on the Storage Card icon Double tap on the WINVNC incon The drop down should now have two entries On for the TPC 66 program and one for the WINVNC ...

Page 39: ...down and back up The VNC icon should auto start just like the con trol program The control program needs to be logged on each time it is started Step VNC Test In this example the TPC IP address was 192 168 1 58 and the VNC port was set to 4747 To access the TPC use a web browser and go to http 192 168 1 58 4747 Click on OK Enter password The VNC interface will allow full operation of the TPC ...

Page 40: ...he out side UDP Tunneling The TPC can be used for UDP tunneling allowing programs such as Zbase to access any of the cards the TPC is communicating with Tap on App and then on Set UDP Port Start Icon for TPC Interface The operating system for the TPC will not allow the permanent creation of a icon for the BTU interface A way around this is to run a batch file that will temporally delete some of th...

Page 41: ... card of the TPC Use the same proce dure as outlined starting on page 28 Once you copy the files your storage card should look similar to this The two new files are BTU Interface and SetDesktop Next the SetDesktop file needs to be added to the Startup menu Repeat the steps outlined on page 31 under step 2 Click on the Add button Double tap the storage Card ...

Page 42: ...panel to remove the keyboard Double tap on the SetDesktop file Tap on the Registry Save button to save the start up menu Top on OK to exit configurator Power the TPC down and back up It should start the BTU interface automatically and also run the batch file Exit out of the BTU interface program and there should be a BTU interface shortcut on the desktop ...

Page 43: ...88 884 8070 FAX 218 346 7485 www btuvent com XT Micro Control Panel 43 Double click on the BTU interface icon and the program should start Note this procedure is currently only for the TPC 66 The files would need to be changed for the TPC 30 ...

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