BTU XT Micro User manual
Manual CRX-001.2
Copyright BTU Ventilation 2010
XT-Micro
www.btuvent.com
3
FORWARD
The new CRX Control Panel from BTU Ventilation is built from the ground u for the 21st century farm man-
ager. Sim licity of o eration, combined with so histicated controls make this.
STANDARD FEATURES:
•
Fresh air door control with 1/10 degree control
•
0-20ma Refrigeration control
•
0-20ma Fan VFD s eed control
•
On board real time clock calendar
•
8 external relay out uts
•
5 relay out uts
•
Dual Plenum tem erature sensors
•
Dual o to isolated RS-485 communication orts
•
Flexible heat mode and Set oint ram ing
•
Back lighted 2x16 local dis lay
•
5 button keyboard
•
Outside and Plenum Humidity sensors
•
CO2 sensor
•
Central distributed time, outside tem and humidity to multi le anels
OPTIONAL FEATURES:
•
Color TPC touch screen interface for u to 10 CRX Bin Controllers.
•
TPC touch screen gateway to internet for remote control and olling of data.
•
Full internet web interface for 10 Bin Controllers using one RGX embedded web server.
•
RGX rovides detailed records for u to 10 CRX anels, using web interface. Direct
download into Excel S readsheet.
•
RGX rovides e-mail and text messaging for u to 10 CRX anels.
•
SDX multi le fresh air door controller
•
VPN web site, look at any number of CRX Bin controllers on one age.
•
VPN records without RGX web interface using TPC Touch screen.
BTU VENTIL TION CORPOR TION ● OFFICE 888-884-8070 ● F X 218-346-7485 ● www.btuvent.com
XT-Micro Control Panel 3
Page
CRX Sensors
1.0 Input nd Output Specifications ………………………………………………. 5
Main Components
2.0 CRX Display & Keyboard …...………………………………………………. 6
2.1 Display Sequence …………………………………………………………….. 6
2.2 Parameter Description ………………….……………………………………. 8
CRX Operation nd larm modes
3.0 Operational Modes ……………………………………………………………. 17
3.1 Secondary Modes ……………………………………………………………… 19
CRX Operation
4.0 Outside ir 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
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XT-Micro Control Panel 4
5
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XT-Micro Control Panel 5
XT nalog Inputs:
•
Plenum 1 F 2250 ohm
•
Plenum 2 F 2250 ohm
•
Outside Air F 2250 ohm
•
Return F 2250 ohm
•
Pile 1 F 2250 ohm
•
Pile 2 F 2250 ohm
•
Pile 3 F 2250 ohm
•
Outside Humid % 4-20mA
•
Plenum Humid % 4-20mA
•
CO2 m 4-20mA
XT Digital Inputs:
•
Fan roving Dry contact
•
Cell um roving Dry contact
•
Refrigeration Fail Dry contact
•
Remote Standby Dry contact
•
Low Tem SPDT contact
•
Start / Sto Dry contact
CRX Sensors: The CRX anel can acce t a number of different in ut sensors and has 13 one am
out uts. In addition, there are two analog out uts that are 0-20mA or 0-10VDC. The fresh air doors
are controlled by two relay out uts.
XT nalog Outputs:
•
Freq Drive 0-20mA / 0-10VDC
•
Refrigeration 0-20mA / 0-10VDC
XT Digital Outputs:
•
Red light
•
Yellow light
•
Fan / Green light
•
Eva cooling um
•
Humidifier um 1
•
Heater
•
Aux 1
•
Cavity heater
•
Door o en
•
Door close
1.0
BTU VENTIL TION CORPOR TION ● OFFICE 888-884-8070 ● F X 218-346-7485 ● www.btuvent.com
XT-Micro Control Panel 6
2.1
CRX Display & Keyboard
10/22/09 13:10
Refig Ramp
Use u and down arrows to navi-
gate thru the main menu. The left
and right keys are used to access
additional arameters associated
with the main menu.
Programmable parameters are
followed with an *. On any of
these parameters pressing the
ENTER key will activate a cursor
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 esca e from the
rogram 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*
Temp SP 65.0
Target 65.0*
Ramp Hrs. 0.1*
Ramp Rt 0.5*
Total RT 340
Clear? N/Y
Unit # 1 *
Plen 1 65.0
Plen 2 65.0
OS Temp 65.0
Start 65.6
OS Hum 49.0
Wetbulb 10.0
OS Diff -1 *
Force? *
Hum SP 95.0*
Plen Hum 95.0
Display Sequence
ENTER
2.0
7
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XT-Micro Control Panel 7
CO2 SP 2000*
CO2 1240
Fan Spd 75.0
Cool Sp 65.6*
Recir Sp 60.0*
Min Sp 50.0*
Ref Sp 90.0*
Purge Sp 70.0*
Heat Diff -2.0* xH Temp 0.0*
xH Time 0*
Schedule 1
Cooling *
Start 00:00 *
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*
OS Sen 3*
OS H Sen 3*
High CO2 -5*
Plen Diff 1.5*
Program
Sys Timers
C T 10*
MCR 10*
MRR 30*
Door 180*
Date
11/13/09 *
Time
07:31 *
Program
Hum Timers
On 10*
Off 10*
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XT-Micro Control Panel 8
Program
Miscellaneous
Cell Eff 90*
R S 3*
ux config 3*
Off 20 On 60
Parameter Description
10/22/09 13:10
Refig Ramp
Shows date, time and anel mode of o eration. No rogrammable values. The left side
of the bottom line is the main mode and the right side is the secondary mode.
Daily RT (system run time since noon) 2.6 hrs
Version 00.03 software version 0.03
Daily RT 2.6
Version 00.03
(Programmable Parameter)
Total Run Time in hours for the year. Clear once a year. Choose Yes to clear time.
Total RT 340.0
Clear? N/Y
(Programmable Parameter)
Unit # is the anel number when used in a network with multi le anels. Each anel
must have a unique number.
Unit # 1 *
(Programmable Parameter)
Tem SP (tem erature set oint) This is the desired lenum tem erature set oint. Press
the ENTER button to change the set oint.
Plenum is the current lenum tem erature. The lenum tem erature is the average of
two lenum sensors. The two sensors are located on J7 and J10.
Temp SP 65.0*
Plenum 65.6
Return is the tem erature of the return air and is on terminals 1&2 of J11.
Pile 1 is the tem erature sensor located on ins 3&4 of J15.
Return 66.0
Pile 1 66.0
Pile 2 is the tem erature sensor located on ins 3&4 of terminal J18.
Pile 3 is the tem erature sensor located on ins 1&2 of terminal J18.
Pile 2 66.0
Pile 3 66.0
Door Pos is the osition of the fresh air doors in ercent.
Ref Out is the refrigeration out ut in ercentage.
Door Pos 0
Ref Out 100
2.2
OM Switches Fan
uto *
Refrig Switch
Manual 25%*
Cavity Switch
uto *
Door Switch
uto *
Clima Switch
Off *
Humid Switch
Manual *
Heat
uto *
ux
Off *
9
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XT-Micro Control Panel 9
The CRX uses two lenum tem erature sensors. Plen 1 is the tem erature sensor on
ins 2&3 of J7. Plen 2 is the tem erature sensor on ins 2&3 of J10. These two sensors
are averaged and dis lay on the main screen as Plenum.
Plen 1 65.0
Plen 2 65.0
(Programmable Parameter)
High Dev (High Deviation) is an alarm setting. If the lenum tem erature exceeds the
tem erature Set oint lus High Dev a High Deviation alarm will be activated. Press the
ENTER button to change the High Dev setting.
Low Dev (Low Deviation) is an alarm setting. If the lenum tem erature is less than the
tem erature Set oint minus the Low Dev a Low Deviation alarm will be activated. To
rogram the Low Dev setting Press the ENTER button and then ress the right button to
osition cursor. Make changes using u and down buttons and then ress ENTER.
High Dev 5*
Low Dev -5*
Temp SP 65.0
Target 65.0*
(Programmable Parameter)
This screen is for setting u the Set oint Ram function. The Target is the desired tem-
erature setting. The system can ram down and ram u . Exam le: the current Tem-
erature Set oint is 65.0 and the final desired storage tem erature is 45.0. Set the Tar-
get to 45.0 and the system will start to gradually ram the tem erature Set oint down to
45.0. Press the ENTER button to change the Target. The Target can be set above the
Set oint for warming and ram ing u or below the Set oint for ram ing 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 art of the Set oint Ram function. The Ram Hrs is the number of hours
the system will run before it makes a Set oint change. Once the system has run the
Ram Hrs the Set oint will be incremented or decremented by the Ram Rate. A ty ical
setting is .1 degrees.
OS Temp 65.0
Start 65.6
This screen shows when Cooling air will be available. Any time the OSA (outside air
tem erature) is less than the Start, Cooling air is available. See the section on outside
air control for the Start calculation.
OS Hum 49.0
Wetbulb 10.0
OSA Hum (outside humidity) Current outside humidity.
The Wetbulb is the wetbulb de ression in degrees. At 100 ercent saturation, the Wet-
bulb is the number of degrees of cooling available with the current outside tem erature.
OS Diff -1 *
Force? *
(Programmable Parameter)
OSA Diff (outside air differential) This is used to offset the Start tem erature. It can be
set lus or minus and is normally defaulted to –1. With no eva orative cooling the Start
tem erature would be Set oint minus the OSA Diff. To rogram ress the ENTER but-
ton.
Force? (force cooling or force refrigeration). This is a rogrammable arameter that al-
lows the o erator to force the system into cooling or refrigeration regardless of the out-
side air tem erature. When forced the system will start, o en the doors and run for the
MCR (minimum cooling run) timer or MRR (minimum refrigeration run). Press ENTER,
then use the right arrow to get the cursor to Force. Use the u and down arrows to acti-
vate the Force Cooling or Force Refrigeration.
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XT-Micro Control Panel 10
(Programmable Parameter)
Hum SP (Humidity Set oint) This is referring the desired Plenum Humidity. Press Enter
to change the Hum SP.
The Plen Hum ( lenum humidity) is the actual lenum humidity. Pin 1 of J26 is the le-
num humidity sensor in ut.
Hum SP 95.0*
Plen Hum 95.0
CO2 SP 2000*
CO2 1240
(Programmable Parameter)
CO2 SP (CO2 Set oint) This is the value for the desired CO2 level in the building. The
value is in m. To change the SP ress the ENTER button. CO2 is the actual value of
the building CO2 level in m.
High CO2 2400*
Timer 15
(Programmable Parameter)
High CO2 is an alarm setting. The value is in m and can be changed by ressing the
ENTER button. Use the u and down arrows to change the value.
The alarm has an associated timer. The alarm can be disabled by setting the timer 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. Exam le: a ten
minute soft alarm would be –10. Press ENTER to change the value and use the u and
down arrows. To go negative, use the down arrow to go ast zero.
Fan Spd 75.0
Cool Sp 65.6*
(Programmable Parameter)
Fan S d (Fan s eed in %) Fan S d is the current fan s eed in ercent.
Cool S is the cooling set oint for the fans when the system in in the Cooling mode. The
Cool S is rogrammable by ressing the ENTER button.
Recir Sp 45.0*
Min Sp 20.0*
(Programmable Parameter)
Recir S (Recirculation Set oint %) Recir S is the Fan s eed set oint when the system
is running in the Recirculation mode. Recir S is rogrammable by ressing the ENTER
button.
Min S (Minimum Set oint %) is the minimum ercent the fans can run at if being con-
trolled by the ile differential.
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