BTU XT-70 User manual

Manual XT-003.5 Copyright BTU
Ventilation 2013

3
FORWARD
The new XT Series Control Panel from BTU Ventilation is built from the groun up for the 21st century farm
manager. Simplicity of operation, combine with sophisticate on-boar ata analysis an internet communica-
tions make this a control panel of the future.
STANDARD FEATURES:
• Twelve temperature sensors
• Three humi ity sensors
• One CO
2
sensor
• Fresh air oor pulse or irectional control
• Centrally istribute time, outsi e air temperature an outsi e air humi ity to multiple panel complexes
• Ethernet panel-to-panel networking
• Pulse humi ity control
• Infinite CO
2
control in refrigeration an cooling mo e
• Refrigeration capacity control
• Fan frequency rive on-boar controller
• In ivi ual frequency setting for each mo e
• Automatic pile temperature ifferential control
• All outputs are plug-in soli state mo ules for noise isolation
• All 4-20mA outputs are optically isolate
• All RS-485 communications are optically isolate
• Buil ing cavity control on-boar
• Manual - Off - Auto (MOA) switches for all outputs
• View multiple fan houses using a single graphical user interface
• Select from a number of ifferent user interface options
• Flexible Heat mo e, with pulse output
• Setpoint ramping
INDUSTRY FIRSTS:
• On-boar embe e web server
• No special PC programs require for remote monitoring an control
• Use any web browser on a PC, laptop, PDA or cell phone to monitor an control your storage
• Secure Socket Layer (SSL) for secure access
• Alarms an aily up ates via e-mail or text messaging.
• File Allocation Table (FAT) file system. All ata ownloa e irectly into a sprea sheet or atabase.
• Integrate all refrigeration information an controls into same atabase an user interface.
• Integrate smart oor controls to i entify in ivi ual oor controls an for accurate oor position.
• Designe for multiple fan house applications. Uses one user interface for a itional fan houses.
• Single boar esign, multi-layer for noise rejection.
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XT-70 Control Panel 3

Page
XT Sensors
1.1 Input And Output Specifications ………………………………………………. 6
Main Components
2.1 XT HMI ……………………………………………………………………………. 7
2.2 XT Control Module …………………………………………………………….. 8
Networking
3.1 Typical Ethernet Network Connections ……………………………………. 8
XT Operation And Alarm modes
4.1 Operational Modes ……………………………………………………………. 9
4.2 Secondary Modes ……………………………………………………………… 12
XT HMI Operation
5.1 Main Home Screen …………………………………………………………….. 14
5.2 Status Screen ………………………………………………………………….. 15
5.3 Password Screen ……………………………………………………………… 18
5.4 Pile temperature Screen …………………………………………………….. 19
5.5 Time Clock ……………………………………………………………………… 20
5.6 Outside Air Control ……………………………………………………………. 21
5.7 Deviation Alarms ………………………………………………………………. 24
5.8 Setpoint Ramp Control ……………………………………………………….. 25
5.9 Fan Speed Control …………………………………………………………….. 26
5.10 Humidity Control ………………………………………………………………. 28
5.11 Miscellaneous ………………………………………………………………….. 30
5.12 Virtual Switches Option Screen …………………………………………….. 32
5.12 Switch & Output Screen ………………………………………………………. 33
5.13 Fresh Air Door Status …………………………………………………………. 34
5.14 Test Mode ……………………………………………………………………….. 36
5.15 Graphing Module ……………………………………………………………….. 37
5.16 Activity og ……………………………………………………………………… 38
5.17 Refrigeration Interface ………………………………………………………… 39
5.18 E2 Memory Setup ………………………………………………………………. 40
E2 Parameters
6.1 E2 Definitions …………………………………………………………………… 41
XT Web Interface
7.1 Web Interface ………………………………………………………………….. 50
7.2 Web Refrigeration Interface ………….…………………………………….. 51
7.3 Web Setpoints ………………..……………………………………………….. 51
7.4 Web Java Control …....……....……………………………………………….. 53
7.5 Web Java Pile Temps …...…..……………………………………………….. 54
7.6 Web Java Run Time Clock ………………………………………………….. 54
7.7 Web Java Outside Air Control ……………………………………………… 55
7.8 Web Java Temperature Dev Alarm ………………………………………… 55
7.9 Web Java Setpoint Ramp ……………………………………………………. 56
7.10 Web Java Fan Speed Control ……………………………………………….. 56
7.11 Web Java Humidity Control …………………………………………………. 57
7.12 Web Java Miscellaneous …………………………………………………….. 57
7.13 Web Java Switch Control ……………………………………………………. 58
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XT-70 Control Panel 4

5
Page
7.14 Web Java Door control ………………………………………………………. 58
7.15 Web Java Refrigeration Control ……………………………………………. 59
7.16 Web Java Records ……………………………………………………………. 59
XT Field wiring
8.1 120 VAC Field wiring ………………………………………………………….. 60
8.2 ow voltage Field wiring ……………………………………………………… 62
ONION CONTRO S
9.0 Onion Basics …………………………………………………………………… 64
9.1 Cure sequence ………………………………………………………………… 64
9.2 Cooling sequence ……………………………………………………………... 65
9.3 Onion Flow Chart ..…………………………………………………………….. 67
Appendix A: XT Records Interface …….……………………………………………. 69
Appendix B: XT Diagnostics Port …….……………………………………………... 77
Appendix C: XT Purge Cycles …..…….……………………………………………... 79
Appendix D: XT Warming Mode ……………………………………………………… 85
Appendix E: XT Sensor Measurements .…………………………………………... 86
Appendix F: XT CO
2
Management ….………………………………………………... 89
Appendix G: XT Potato Dehumid …..….……………………………………………... 96
Appendix H: XT HMI Records …………………………………………………………. 97
Appendix I: Sweet Potato Operation ………………………………………………... 98
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XT-70 Control Panel 5

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XT-70 Control Panel 6
XT Analog Inputs:
• Plenum 1 F 2250 ohm
• Plenum 2 F 2250 ohm
• Outsi e Air F 2250 ohm
• Return F 2250 ohm
• Pile 1 F 2250 ohm
• Pile 2 F 2250 ohm
• Pile 3 F 2250 ohm
• Pile 4 F 2250 ohm
• Pile 5 F 2250 ohm
• Pile 6 F 2250 ohm
• Pile 7 F 2250 ohm
• Pile 8 F 2250 ohm
• Outsi e Humi % 4-20mA
• Plenum Humi % 4-20mA
• Return Humi % 4-20mA
• CO2 ppm 4-20mA
XT Digital Inputs:
• Fan proving Dry contact
• Cell pump proving Dry contact
• Refrigeration Fail Dry contact
• Remote Stan by Dry contact
• Spare
• Spare
• Spare
• Spare
• Low Temp SPDT contact
• Air Restrict Dry contact
• Start / Stop Dry contact
XT Sensors: The XT panel can accept a number of ifferent input sensors an has ten soli state 3
amp outputs. In a ition, there are two analog outputs that are 0-20mA or 0-10VDC. The fresh air
oors are controlle by two relay outputs.
XT Analog Outputs:
• Freq Drive 0-20mA / 0-10VDC
• Refrigeration 0-20mA / 0-10VDC
XT Digital Outputs:
• Re light 3A 120VAC SS
• Yellow light 3A 120VAC SS
• Fan / Green light 3A 120VAC SS
• Evap cooling pump 3A 120VAC SS
• Humi ifier pump 1 3A 120VAC SS
• Humi ifier pump 2 3A 120VAC SS
• Heater 3A 120VAC SS
• Aux 1 3A 120VAC SS
• Aux 2 3A 120VAC SS
• Cavity heater 3A 120VAC SS
• Door open 12VDC/relay
• Door close 12VDC/relay
Note - The Aux 1, Aux 2, an cavity heater can be set to be interlocke with the Start / Stop
switch, mechanical Low Temp an Air Restriction evices or to operate in epen ently.
1.1

7
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XT-70 Control Panel 7
XT Panel Main Components
G70 HMI (Human Machine Interface) color touch screen: The XT panel has many options for user inter-
faces. The stan ar interface is a G70 an is a 320 x 240 color touch screen. An optional G75, 640 x 480 lar-
ger color touch screen, is also available. Active touch buttons are either labele or shown as raise buttons.
Pressing one of these buttons will pro uce a keypa for entering a new value.
The sole purpose of the HMI is to provi e a frien ly user interface to the XT control car . One HMI can commu-
nicate with multiple XT panels an more than one HMI can communicate with the same XT panel. The HMI is
not necessary for the XT panel to run. A PC with the appropriate software can also act as an HMI. Ethernet is
use for the communications connection between the HMI an XT panel. With the high spee of the internet, it
is now possible to locate the HMI screen almost anywhere.
HMI Hot Keys: The HMI has a number of hot keys use to go irectly to a screen verses using the FWD> an
<BWD keys. For example, pressing the label TEMP SP on the home screen will irectly bring up the Tempera-
ture Setpoint Ramp screen. Pressing the <HOME> key on any screen will go irectly back to the first general
screen (the home screen).
2.1

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XT-70 Control Panel 8
XT Control Module: The XT control mo ule was esigne for economics, ease of installation, manufacturing
an flexibility. Each outputs on the XT mo ule has a MOA (Manual-Off-Auto) switch an an LED in icator asso-
ciate with it. By incorporating the MOA switches as part of the panel, it allows for a very compact mo ule an
also allows the microprocessor to rea full switch status. The mo ule also inclu es a refrigeration control poten-
tiometer for use in manual mo e. This allows a justment of the output of the refrigeration for testing purposes.
At all times, the low temperature an air restriction safeties, along with the Start/Stop switch, supervise the out-
puts. The Aux 1, Aux 2 an Cavity outputs can be set for supervision or act in epen ently of the Start/Stop
switch an system safeties.
Typical Ethernet Network Connections
XT Panel 01
XT Panel 02
Router
INTERNET
Remote PC
Remote HMI
Local HMI
Local PC
2.2
3.1

9
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XT-70 Control Panel 9
XT Modes: The XT Panel operates in two mo es: the main operation mo e an a secon ary mo e. Depen -
ing on the setup of the alarms, it is possible to continue running in an alarm mo e.
For example, for a cell pump failure, the secon ary mo e woul in icate a cell pump failure, sen out the alarm,
in icate an alarm (a blinking re light) but continue to run in Cooling or Refrigeration. Wetbulb calculation woul
be shut off.
4.1 XT Modes of Operation
MAIN OPERATIONA
MODES
SECONDARY
MODES
Main Operation Modes:
Shutdown: Shut own is activate by the Stop/Start switch set to the Stop position.
Standby: Stan by can only be activate with the time clock set to stan by or
with no outsi e cooling available uring Cooling mo e.
Cooling: Cooling mo e can only be activate with outsi e cooling air available
an time clock set to either Cooling or Refrigeration mo e.
Refrig: Refrigeration mo e will be activate when cooling air is not available
an the time clock is set for Run or Ref Only.
Timed: Time Run will be activate when the time clock is set to Run, there
is no outsi e cooling air available an the refrigeration switch is set to
Off.
Remote Stop: Remote stop is activate with the Stop button from either the HMI
touchscreen or web interface.
Test: The Test mo e is a special mo e that allows remote testing of all out-
puts. This is activate from either the HMI or the web interface.
ow Temp: The low temp alarm is triggere by the backup low temp safety
thermostat. It can only be reset with the Start/Stop switch.
Air Restriction: The Air Restriction alarm is triggere by the air pressure ifferential
switch. It can only be reset with the Start/Stop switch.
Parameter Fail: The Parameter fail is triggere by an out-of-range setting on one of the
critical parameters. If setpoint is < 32.0 or > 76.7, the alarm is trig-
gere . If target is < 32.0 or > 76.7, the alarm is triggere . If pile iff
selection > 8, the alarm is triggere . If Start ifferential > 50 or < -50,
the alarm is triggere .

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XT-70 Control Panel 10
Comm Fail: Loss of communication between the Rabbit an P1 processor for more
than three minutes. An internal comms bus failure is serious.
Power Fail: Loss of 110VAC control power.
Remote Standby: Remote Stan by is activate by a contact closure across input IN4.
Typically use for off-peak power, ripple control or refrig efrost.
Alarm Standby: Any alarm con ition that was set to shut own the system.
Cure: This mo e is a Onion mo e. This mo e is use when the fresh air
oors are being use to cure the onions.
Burner: This mo e is a Onion mo e. This mo e is use when the burner is
being use to cure the onions.
Fan Fail: The fan input IN1 i not get a close contact within the fan fail timer
perio . There is a programmable timer associate with this alarm.
Fan Off: The fan MOA switch is in the Off position.
Warming: The virtual warming switch in in the Auto position. In Warming mo e,
the oors will open whenever the OSA is greater than the start tem-
perature an will warm the plenum air up to the setpoint. The PID is
running in a reverse mo e, opening the oors whenever the plenum is
too col . When OSA is less than the start temperature the system will
run in Cooling. The time clock must be set to Cooling for the Warming
mo e to operate.
Cooling / Purge: The system is in Cooling an the return air heaters are being use to
force the fresh air oors open. This cycle has been triggere by time
an not the CO2 sensor.
Refrig / Purge: The system is in Refrigeration an the fresh air oors are open to the
max oor setting. This cycle has been triggere by time an not the
CO2 sensor.
Timed / Purge: The system is in Time an the time purge cycle is active. At the
esignate time, the fresh air oor will open to the max oor setting
an purge for the programme time. This cycle has been triggere by
time an not the CO2 sensor.
Refrig / AR : The system is in Refrigeration an the ARL (ambient reverse loa ing) is
active. The Fresh air oors are being use to bring in fresh air an keep
the refrigeration running at a minimum setting.
Cooling / CO2: The system is in Cooling an the CO
2
level is above The CO2 setpoint.
The return air heaters are active to help open the oors an purge the
CO
2
.