Aerotech ST 5121 User manual

ST 5121
Temperature Controller
USER'SMANUAL
Aerotech, Inc. FORM:QM1333
4215 Legion Dr. Mason, MI 48854-1036 USA October 1998
Ph. [phone] Fax [phone]
ST5121

2QM1333.rev.00
TABLE OF CONTENTS
PRECAUTIONS.................................................................. 3
FEATURES ........................................................................ 4
LOCATION OF THE CONTROLS ...................................... 6
ControllerStatusLeds ...................................................... 7
InternalSwitches ............................................................... 7
INSTALLATION .................................................................. 8
MountingInstructions......................................................... 8
Connections ..................................................................... 8
MotorTypes...................................................................... 9
Heating/Cooling Option................................................... 11
TemperatureProbes......................................................... 11
CHANGING THE PARAMETER SETTINGS...................... 14
TheMeaningofaFlashingDisplay ................................... 14
LockingtheParameters Settings ...................................... 14
TEMPERATURE SETTINGS ............................................. 15
TemperatureUnits ............................................................ 15
ViewingTemperatures...................................................... 15
TemperatureSetPoint...................................................... 18
TemperatureCurve ........................................................... 19
VENTILATION SETTINGS ................................................. 23
CoolingOperation............................................................. 23
MinimumVentilationCycle ................................................ 25
VentilationSettings ........................................................... 27
MinimumVentilationSpeedCurve .................................... 29
Mist Cooling ..................................................................... 34
HEATER SETTINGS .......................................................... 37
ALARM SETTINGS ............................................................ 39
TROUBLESHOOTING GUIDE ........................................... 40
TECHNICAL SPECIFICATIONS ........................................ 45
FACTORY SETTINGS ........................................................ 46
Page

3
QM1333.rev.00
We strongly recommend installing supplementary natural
ventilation, a failure alarm system as well as a back-up ther-
mostat on at least one cooling stage (refer to the wiring
diagram enclosed with this user's manual to connect the ther-
mostat).
Althoughfusesattheinputand outputs of the controller protect
its circuits in case of an overload or overvoltage, we
recommend installing an additional protection device on the
supply circuit as well as an external relay on all ON-OFF sta-
ges to prolong the life of the controller.
The room temperature where the controller is located MUST
ALWAYS REMAIN BETWEEN 32°F AND 104°F (0°C TO 40°C).
To avoid exposing the controller to harmful gases or exces-
sive humidity, it is preferable to install it in a corridor.
DO NOT SPRAY WATER ON THE CONTROLLER
PRECAUTIONS
FORCUSTOMERUSE
Enter below the serial number located
on the side of the controller and retain
this information for future reference.
Model number: ___ST 5121___
Serial number: _____________
Date installed: _____________

4QM1333.rev.00
The ST 5121 is an electronic device used for environmental control in live-
stock buildings. It allows the user to maintain a specified target tempera-
tureby controllingthe operation of ventilation and heating equipment. One
stage of variable speed cooling fans can be connected to the controller, as
wellas onestage of constant-speedfans andtwo stagesof either constant-
speed fans or heating units. In addition, the last cooling stage can be
configured as a mist cooling stage.
Themain features of the ST5121 are as follows:
THREE-DIGITDISPLAY
A three-digit display provides a high level of accuracy, allowing the user to
specifya temperature to within onetenth of a degree (inFahrenheit or Cel-
sius units).
PILOT LIGHTS
Pilot lights indicating the state of outputs allow the user to monitor the
operation of the system without having to enter the building.
MINIMUM VENTILATION CYCLE
Whenventilation is notrequired forcooling, the firststage fanscan be oper-
ated either continously or intermittently to reduce the level of humidity and
supply oxygen to the room.
TEMPERATURE ANDMINIMUM VENTILATION SPEED CURVES
Thecontroller canbe setto automaticallychange thetemperature setpoint
andtheminimumventilation speed over agivenperiodof time in accordance
withthe user's requirements by specifyinga temperature curve and amini-
mum ventilation speed curve with up to six different points each.
CHOICE OF FIVE MOTOR CURVES
Thevariation inmotor speedresulting froma changein voltagewill depend
onthe makeand capacityof the motor. In orderto achievea high degree of
compatibilitybetweencontrollerand motor, theusercanchoose from among
fivedifferentmotor curves, thusensuringthatthe correctvoltageissupplied.
FEATURES

5
ST 5121
QM1333.rev.00
FULL-SPEEDFAN START-UP
In order to overcome the inertia of the ventilation system components and
de-ice the fan blades in cold weather conditions, the controller supplies
maximum voltage to the variable speed fans for 2 seconds immediately
followingeach start-up.
FOURINDEPENDENTTEMPERATUREPROBEINPUTS
Upto four temperatureprobes can beconnected tothecontroller inorder to
obtain a more accurate reading of the average room temperature and a
fasterreaction time.
OVERLOADANDOVERVOLTAGEPROTECTION
Fuses are installed at the input and outputs of the controller to protect its
circuitryin thecase ofan overload or overvoltage.
COMPUTERCONTROL
The controller can be connected to a computer, thus making it possible to
centralizethe managementof information and diversify control strategies.
CONTROL OF AIR INLET MOVEMENT
If the ST 5121 is used in combination with a SB 2000 controller, the move-
mentof the airinlets can becoordinated withtheoperation ofthe fans using
a potentiometer located on the curtain machine or baffle actuator. This
allowsthe airinlets to beadjusted correctly, withoutthe influence ofuncon-
trollable factors such as wind or air from adjoining rooms. When tunnel
ventilation is being used, the SB 2000 closes the air inlets.
HIGH/LOWTEMPERATUREALARM OUTPUT

6QM1333.rev.00
LOCATIONOFTHECONTROLS
AEROTECH, INC. Mason, MI 48854 USA
ST5121

7
ST 5121
QM1333.rev.00
DELGNINAEM
1EGATS .NOERASNAF1EGATSNEHWNOSNRUT
2EGATS .NOERASNAF2EGATSNEHWNOSNRUT
/3EGATS
BRETAEH .NOERASTINUGNITAEHROSNAF3EGATSNEHWNOSNRUT
/4EGATS
ARETAEH .NOERASTINUGNITAEHROSNAF4EGATSNEHWNOSNRUT
.PMET
EVRUC
.DETAVITCASIEVRUCERUTAREPMETEHTNEHWSEHSALF SIEVRUCDEEPSNOITALITNEVMUMINIMEHTNEHWNOSNRUT
.NOOSLA
EBORP.FED .DETCETEDSIEBORPEVITCEFEDANEHWNOSNRUT
MRALA .DETCETEDSIMRALANANEHWNOSNRUT
DEKCOL .DEKCOLERASRETEMARAPRELLORTNOCNEHWNOSNRUT
CONTROLLER STATUS LEDS
#FFONO
1
DEKCOLNU
SRETEMARAP SRETEMARAPDEKCOL
2SEERGEDTIEHNERHAFSEERGEDSUISLEC
3SEGATSGNITAEHONSEGATSGNITAEH
4RETAEH1SRETAEH2
INTERNAL SWITCHES
The internal switches are located on the inside of the front cover. When
the controller is shipped from the factory, all the switches are set to OFF.
ON
2
134675 89 11
10 12

8QM1333.rev.00
Toconnectthecontroller,refertothewiringdiagramenclosedwiththisuser's
manual.
nSetthevoltageswitchtotheappropriatevoltage.
nUse the electrical knockouts provided at the bottom of the enclosure.
Do not make additional holes in the enclosure, particularly on the top
ofthe enclosurewhen usinga SL 1400 communication board.
nIf metallic cable holders are used to secure cables entering the
enclosure,usethegroundplateprovidedwiththecontroller. Connect
the ground wire to the ground stud on the plate.
nFor the heating stages, it may be necessary to install a transformer in
orderto supply theappropriate voltage tothe heating unit.
ALARMCONNECTION: Therearetwotypesofalarmsonthemarket. One
typeactivateswhencurrentiscutoffatitsinput,whereastheotheractivates
whencurrentissuppliedatitsinput. Foranalarmofthefirsttype,usetheNO
terminalasshownonthewiringdiagram. Foranalarmofthesecondtype,use
theNCterminal.
Openthelatchandliftthecover.Removetheblackcapslocatedoneachof
thefourmountingholes. Mounttheenclosureonthewallusingfourscrews.
Besure theelectrical knockouts areat thebottom ofthe enclosure inorder
topreventwaterfromenteringthecontroller.Insertthescrewsinthemounting
holesandtighten. Fastenthefourblackcapsprovidedwiththecontrolleronto
thefour mounting holes. The enclosuremust be mounted in alocation that
will allow the cover to be completely opened right up against the wall.
ALLWIRINGMUSTBEDONEBYANAUTHORIZEDELECTRICIAN
AND MUST COMPLY WITH APPLICABLE CODES, LAWS AND
REGULATIONS.BESUREPOWERISOFFBEFOREDOINGANY
WIRINGTOAVOIDELECTRICALSHOCKSANDEQUIPMENTDAM-
AGE.
INSTALLATION
MOUNTING INSTRUCTIONS
CONNECTIONS
!
WARNING

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ST 5121
QM1333.rev.00
Therelationship between thevoltage supplied toa motorandits operating
speed is described by a motor curve. This curve varies with the make and
capacityofthemotor. Thevariousmotorsavailableintheindustryhavebeen
dividedintofivecategoriesandthecontrollerhasbeenprogrammedwitha
different motor curve for each of these categories. To ensure that the
controller supplies the correct voltages, an appropriate curve must be
selectedforStage1 according tothetypeof fan motorsused(seetable on
followingpage).
Selecting a Motor Type
Refer to the list of motors on the following page to determine which type
number (1 to 5) is appropriate for the motors used.
nSet the selection knob to
STAGE 1 — BANDWIDTH. The
Stage1bandwidthflashesonthe
display.
nPress the push-button. The cur-
rently selected type is displayed,
alternating with the letters "tYP".
nUsetheadjustmentknobtoadjustthemotortypetothedesiredvalue.
nReturn to the Stage1bandwidthdisplayby pressingthepush-button.
MOTOR TYPES

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ST 5121
QM1333.rev.00
Fan
Dia.
9"
14"
15"
16"
18"
24"
36"
Model Numbers
AT09Z1, AT10SP1, AT10AP1 (120 VAC)
AT09Z2, AT10SP2, AT10AP2 (240 VAC)
AT14Z, AT14F,AT14G
AT15AP, AT15SP
AT16Z, AT16F,AT16G
AT18Z, AT18F,AT18G,GB18
AT24Z, AT24F,AT24G,GB24
AT36Z,AT36ZB1,AT36G1, AT36GB1
Motor
Curve
1
1
1
1
3
3
4
5
Minimum
Speed
45
45
65
65
30
40
40
30
Minimum
Voltage
Output
81
42
101
101
101
107
117
130
CFM
at 0.05"
S.P.
50
50
120
110
140
600
1250
1250
Minimum Speed Setting and Motor Curve Selection
Control Settings
Theabove valuesassume thefollowing conditions unless noted otherwise:
1) Input Voltage: 240 VAC
2) Static Pressure: 0.05" S.P.
3) Fan Accessories: Hood, Guard and Shutter if applicable.
For configurations or requirements other than above, refer to Form QM1065.