Agrowtek GrowControl User manual

GrowControlTM
Climate Controller & Data Logger
Installation
&
User Operation Manual
DANGER
Risk of Electric Shock!
This system operates on 100-240V and can cause electric shock resulting in injury or death.
Read all warnin
g
s and instructions before o
p
eratin
g
this e
q
ui
p
ment.
REV081507
WARNING
The controller enclosure, sensors and accessories are not rated for water contact.
DO NOT expose to direct, spray, splashing, misting or other water contact!

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 1
Table of Contents
Setup Overview
InstallationInstructions 2
CircuitBreaker 2
Connections
Connecting Climate Sensors 3
Connecting Flood/Shut-Down Sensor 3
ConnectingEquipment 4
Operating Instructions
Commissioning 5
PowerIndicatorLED 5
InitialSetup 5
SettingTime&Date 5
Run/StopMode 6
Accessing System Menus
MainSettingsMenu 6
ChangingtheSettings 6
CurrentSensorView 6
ClimateSetup
CoolingControl 7
HumidityControl 7
HeatingControl 7
Lighting Mode
LightingMode 8
SolarSetPoint 8
HumidityMode 8
Timers
Cycle Timer Operation & Modes 9
LightingDurationTimer 9
24HourLightingTimer 9
PumpTimers&Operation 10
Configuration
HighTemperatureLimit 10
Re-Start Delay Timer (Shut-Down Sensor) 10
Anti-Short Cycle Timer (Lighting) 10
EquipmentDelayTimer(Lighting) 10
CO2 Control
Timerbasedoperation 11
PPMSensorbasedoperation 11
PC Control & Data Logging
ConnectingtoPC 12
PCRequirements 12
RunningtheSoftware 12
MonitoringTab 13
ClimateSettingsTab 14
CO2PPMSettingsTab 15
LightingSettingsTab 15
CalibrationTab 16
ClockTab 16
DataLoggingTab 17
Cleaning & Maintenance
Cleaning the Foam Air Filter 18
Replacing the Temperature/Humidity Sensor 18
Specifications 19
Troubleshooting 20
Warranty 21

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 2
Setup Overview
The GrowControl digital climate controller can be operated as a stand-alone device or with a Windows® PC and the
GrowControl Monitor software. A communication cable and the free Monitor software are required to perform data logging
and PC-communication operations.
Quick Setup Instructions:
1. Mount the controller in a suitable location.
2. Attach the environmental sensors. There are two 6-pin Mini-DIN sensor ports for the atmosphere and CO2 sensors.
Each sensor can be plugged into either sensor port.
Plug only Agrowtek sensors and cables into the sensor ports!
3. Attach equipment according to the label the controller.
4. Plug the controller power cord into a suitable minimum 15Amp 120V circuit.
(We recommend a dedicated circuit with GFCI protection & a surge suppressor!)
5. Set timers, values, climate set points and properties to desired settings.
6. Place the controller into “Run” mode to make equipment operational.
Installation Instructions
Mounting the Controller:
Your controller can be mounted to any wall using the four holes in the mounting flanges. The controller must be mounted
upright on a vertical wall to ensure maximum controller life. Allow adequate space for convection through the cooling slots;
ensure the slots are not blocked.
Keep in mind the maximum allowable temperature and humidity when selecting a location to mount the controller. Make sure
the controller, sensors, and other controller accessories are not in a splash, drip or other water contact location.
Mounting the Sensors:
Locate the climate sensor in a clean and dry location where it will sample non-
stagnant air.
If you are utilizing the photo-cell for sun sensing, ensure the photo-cell is
un-affected by lighting equipment.
The climate and CO2 sensors can be oriented in any direction except where
water & debris can easily enter the exhaust slots or fan. It is recommended that
the exhaust slots be directed downward to prevent water & debris entry.
Circuit Breaker
This controller is equipped with a 15 amp thermal circuit breaker. Exceeding the rated current will cause the circuit breaker to
shutdown the controller. Wait 5 minutes and then press the reset button. You should hear/feel a click and the controller
should restart.
WARNING
Read these requirements, installation and operating instructions very carefully. Failure to follow the instructions
could result in a controller malfunction. A malfunction could result in serious equipment damage, property
damage, bodily injury or death.
FOR YOUR SAFETY
This controller is equipped with a grounded power lead and must be wired into a properly grounded outlet.
DO NOT remove the ground terminal from the plug. DO NOT circumvent the ground terminal.
Mounting
Holes
Cable
Port
Photo
Cell
Sampling
Fan
Climate Sensor
Exhaust
Slots
NOTICE!
Sensors must not be exposed to water!

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 3
Connections
Connecting Climate & CO2 Sensors
GrowControl’s climate and CO2 ppm sensors are connected using standard mini-DIN 6 straight through cables.
Either sensor can use either sensor port on the GrowControl!
Important! To reduce the risk of damage to the controller, always connect cables at the sensor end first and disconnect
cables from the controller end first. This prevents the chance of a short circuit on the end of the sensor cable.
Connecting a Sensor:
1. Plug the sensor cable into the sensor cable port.
2. Plug the sensor cable into one of the GrowControl sensor ports.
Disconnecting a Sensor:
1. Disconnect the sensor cable from the GrowControl sensor port.
2. Disconnect the sensor cable from the sensor cable port.
Sensor cables can be extended using male-female extension cables (available from Agrowtek) up to 50ft.
Connecting Shut-Down Sensor
GrowControl features a unique shut-down sensor that can be used for flood prevention, security and other measures. When
the shut-down sensor is tripped, the controller de-activates all equipment until the “Re-Start-Delay” timer has completed.
Connect Agrowtek’s flood sensor or create your own sensor/switch with a standard IEC320 C14 cable. (available from
Agrowtek.)
Important! The shut-down sensor operates on 24 VDC.
DO NOT:
1. Take power from the shut-down sensor port, or
2. Supply power to the shut-down sensor port
Proper Flat-Spot Orientation
Connect Switch ONLY!

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 4
Connecting Equipment
Input Voltage:
GrowControl operates on AC pwoer between 90 and 240 VAC (47-63Hz.)
The input voltage will be passed to the equipment outlets when
they are activated.
GrowControl comes with eight (8) outlets that control up to six (6) pieces
of equipment.
Each equipment output can handle 8 Amps Resistive/2 Amps
Inductive @ 120/240VAC (1000 Watts)
The controller can handle a maximum of 15 Amps (resistive) combined.
Extension Cords may be used to connect equipment to the controller.
Ensure the cord it the proper type and gauge to handle the conditions
and power load.
If your equipment requires greater current than 8 Amps or a different
voltage than supplied by the controller, a high-power relay must be
used. High power relays plug into the equipment outputs and act as a
switch to turn on power to the equipment from another circuit.
Receptacle Assignments
Typical Application Example

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 5
Operating Instructions
The Screen and Key Pad:
The figure below shows the main or home screen, of the controller; here a variety of current controller status data is
displayed.
Commissioning your Controller:
When your controller starts from a power-off condition it must complete a
4:00 minute warm-up to ensure the sensor readings are accurate before
attempting to operate any equipment.
This timer prevents strange operating conditions when power is cycled
to the controller from power outages or maintenance.
Power Indicator LED:
The GrowControl processor has an LED to indicate the controller is powered.
A “Flashing” LED indicates that the controller is functioning properly.
Setting Up Your Controller:
When you first commission your controller, it should be in the STOP condition; this prevents any attached devices from
starting unexpectedly. Before placing the controller into RUN mode, enter all of your desired set points, timer values and
configuration options.
Setting the Time and Date:
1. From the home screen, press the OK key to enter the system menu
2. Scroll down to SET CLOCK... and press OK
3. SET CLOCK will be blinking, press OK
4. Move to the value you wish to change and press OK
5. Use the UP/DOWN keys to adjust the values
6. Press OK to set the values or press ESC to return to the previous value
7. Press ESC until you return to the home screen.
At the main screen the time and day should now be accurate.
Setting the Daylight Savings Time:
1. From the home screen, press the OK key to enter the system menu
2. Scroll down to SET CLOCK... and press OK
3. Select DST... and press OK
4. To disable DST, select NONE and press OK
5. To enter a manual summer and winter start date, select MANUAL and press OK
6. To accept the US, EU or GB standards, select the desired standard and press OK
7. To create custom rules for summer start/end select RULE and press OK
Select SUMMERTIME START or SUMMERTIME END to create custom rules
8. Press ESC until you reach to home screen
Controller Operational
(Always RUN)
Current Output Status
“1” = Output 1 = ON
“
.” = Out
p
ut OFF
Day of Week
Current Input Status
“1” = Input 1 = TRUE
“
.” = In
p
ut FALSE Time
(Press ALT to
scroll
through
Date/Time)
Home Screen

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 6
Run/Stop Menu
The controller will not operate until it is placed into “RUN” mode. This allows the
user to setup the controller before allowing it to operate. This function can also
be used for maintenance operations.
To start/stop the controller:
1. Press the RIGHT arrow key to enter the RUN/STOP menu.
2. Press the LEFT arrow key to start or stop the controller.
Press the UP arrow key to exit the menu.
Accessing the Menus
This controller has an advanced set of digital timers, clocks and counters in conjunction with a software program that offers
complex control of your equipment. The variables are customer adjustable values such as timers, temperature, etc. that can
be set very easily on the controller screen.
Accessing the Main Menu
System Menu #1
1. Press the DOWN arrow key to enter the main menu.
2. Press the LEFT arrow key to enter the climate settings such as
temperature, humidity, CO2, and solar switch point.
3. Press the RIGHT arrow key to set the various timer settings
such as pump cycles, CO2 timers, etc.
4. Press the DOWN arrow key to enter system menu #2.
5. Press the UP arrow key to exit the menu.
System Menu #2
6. Press the LEFT arrow key to enter the system configuration.
7. Press the RIGHT arrow key to enter the calibration menu.
8. Press the UP arrow key to exit the menu.
Changing the Settings
When you select a sub-menu to enter, the controller will scroll
through settings pages at four (4) second intervals. When you
reach a menu with settings you want to edit:
1. Press the ALT key
2. Navigate to the setting to be changed
3. Press the ENTER key and change the values
4. Press the ENTER key to save your settings;
press the ESC key to cancel your settings
5. Press the ESC key to continue scrolling
View Sensor Status
The current sensor readings can be readily displayed on the screen by
pressing the LEFT arrow key. The screen will flash between the sensor
readings and the current I/O status.
Press the UP arrow key to exit this mode.
NOTICE
Before placing the controller into RUN mode for the first time, enter all
of your desired set points, timer values and configuration options.
RIGHT >
DOWN
V
LEFT <
System Menus
DANGER!
ALWAYS place your controller into STOP mode before powering it down.
This prevents the possibility of accidental equipment startup when powered back on.
Run / Stop Menus

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 7
Climate Setup
Cooling Control
GrowControl will operate the ventilation output when the temperature
levels rises above the set point. Separate set points are provided for
day and night.
Temperature controls over-ride CO2, Heating, Humidification, and
ventilation cycle timer functions in the event ambient conditions rise
above the set-points.
Acceptable Values: 0 – 185 °F
Note: Entering a value above the acceptable range will prevent ventilation equipment from activating.
The hysteresis is the amount above the set point that the controller will allow before activating.
Example:
A set point of 70°F and a differential setting of 5°will cause the controller to turn on ventilation at 75°F until it returns to 70°F.
Night Cycle Timer
A ventilation night cycle timer is provided to allow ventilation
equipment to be operated at minimum intervals during the night.
(This screen is found under the “Timer Setup” menu.)
Acceptable Values: 00:00 to 99:59
Humidity Control
When in Humidity Mode “0” (“humidification” mode) GrowControl
will operate the humidity output when the humidity level falls below
the “Humidify Set” point and operate the ventilation output when the
humidity rises above the dehumidify set point.
When in Humidity Mode “1” (dehumidification mode) GrowControl
will operate the humidity output when the humidity level rises above
the “Dehumidify Set” point; the ventilation output will not respond to
humidity levels.
Separate set points are provided for the day and night. The hysteresis
is the amount above or below the set point that the controller will
allow before activating.
Acceptable Values: 0 –100 %RH
Heater Control
GrowControl will operate the heater output when the temperature level
falls below the heating set point. Separate set points are provided for
the day and night.
The hysteresis is the amount above the set point that the controller
will allow before activating. Heat is disabled if ventilation is activated.
Acceptable Values: 0 – 185 °F
Max Temperature
Max Humidity
Ventilation Night Cycle Time
r
Minimum Temperature
Minimum Humidity

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 8
Lighting Mode
GrowControl features five (5) different lighting modes for maximum
flexibility:
Set the lighting mode:
1. Enter the Configuration menu
2. Wait until the Lighting Mode / Off Delay Timer menu appears
1. Press ALT and navigate to the lighting mode variable
2. Press ENTER to select the lighting mode variable
3. Use the arrow keys to adjust the lighting mode.
Note: Only adjust the right most digit; the first three must remain “+00”.
Acceptable Values: +000 to +004
Setting to any value other than 0-4 will prevent the controller from functioning properly!
Mode 0 – 24-Hour Timer
In this mode lighting (and day/night mode) is controlled by a 24 hour on/off timer. Day mode will begin when the lighting
timer activates and ends when the lighting timer de-activates, regardless of sun levels.
Mode 1 – 24 Hour Timer w/Photo Cell Cancel
In this mode lighting (and day/night mode) is controlled by a 24 hour on/off timer. The photo sensor will turn off the lights
when ever the sun light levels are above the solar set point. Day mode will begin when the lighting timer activates and ends
when the lighting timer de-activates, regardless of sun levels.
Mode 2 – Add Duration at Sun Set
In this mode lighting is operated for a set duration (HH:MM up to 99:59) each time the solar levels fall below the solar set
point (sun set.) Day/Night mode is determined by the solar set point and the lighting status. Day mode begins when the sun
rises and ends when the lights turn off.
Mode 3 – Fixed Duration
In this mode lighting is operated when the sun sets if the sun exposure time has been less than the lighting duration time
(HH:MM up to 99:59). Lights will operate for the remainder of the lighting duration time after the sun has set. Day/Night
mode is determined by the solar set point and the lighting status. Day mode begins when the sun rises and ends when the
lights turn off (or when the sun goes down, in the case when the sun is present long enough to fulfill the duration timer
requirement and the lights do not come on.)
Mode 4 – Natural Duration
In this mode lighting (and day/night mode) is controlled by the solar set point. Day mode begins when the sun rises and ends
when the sun sets.
Solar Set Point
The solar set point determines when the controller differentiates between day and night. Solar readings are taken in a scale
from 0-100%. In lighting modes 1-4 sun rise and sun set are determined by the solar light level. The solar light level is not
used in mode 0 and its setting does not have any effect.
Selecting a set point:
It is recommended that you start with a low value such as 10%. Observe the percentage readings as light levels fall to
determine when you want the controller to differentiate between night and day.
Note: The solar set point has a built-in hysteresis of 4% to prevent erroneous switching. This means that sun set will occur at
the set point and sun rise will occur at 4 + the set point.
Acceptable Values: 0 – 96
Humidity Mode
The humidity mode determines how GrowControl will operate the humidity output and whether or not the ventilation output
will operate based on high humidity. When “Humid Mode” is set to 0the humidity output will operate as a humidification
output and will use the “Humidify Set” set points to raise humidity levels; the Ventilation output will use the “Dehumidify Set”
set points to lower humidity levels. When “Humid Mode” is set to 1the humidity output will operate as a de-humidification
output and will use the “Dehumidify Set” set points to lower humidity levels; the Ventilation output will not use humidity data
and will be operated only on the “Cooling Temp Set” set points.
Acceptable Values: 0 – 1
Light Mode, Humidity Mode &
Solar Set point
Main Menu -> Next Menu
-> Configuration

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 9
Timers
Repeat Cycle Timers
Cycle timers have an “on” time and an “off” time which you can specify in any amount between 1-9999 minutes. Setting an
“on” time of “02:00” and an “off” time of “05:00” will make the device run for two minutes and rest off for five minutes before
powering on again for another two minutes and so on.
Timer Settings & Options:
Timers can be configured to operate constantly, operate once or not operate at all based on the time values you enter.
To cancel a timer:
1. Set the On time value to 00:00
2. Set the Off time value to 99:59.
To operate once:
4. Set the On time to any value equal or greater than 00:01.
5. Set the Off time to 99:59.
To operate a timer continuously:
1. Set the On time to 99:59
2. Set the Off time to 00:00.
Lighting Duration Timer
When the controller is in lighting mode 2 or 3, the Lighting Duration
Timer is used.
Acceptable Values: 00:00 to 99:59
Lighting 24 Hour Timer
In lighting modes 0 and 1, lighting is operated based on the 24 hour lighting timer instead of the duration timer.
Setting the 24 hour lighting timer:
1. From the “home” screen, press OK
2. Scroll down to PARAMETERS and press OK
3. Select HW01 and press OK
DO NOT change any other parameters or you will damage the functioning of the controller!
4. Press OK to select channel A
Channels A-D operate the lighting equipment. Up to 4 different timers can be used on different day intervals to
control the lights.
5. DY1 and DY2 are the days of the week that the timer is active.
Most applications only use one (1) 24 hour timer channel (Channel A) for the entire week (DY1 = MO, DY2 = SU.)
6. Scroll down to the ON and/or OFF time values and press OK to edit the values. Use the Up/Down buttons to
change the values and press OK to accept the values or ESC to cancel.
7. Press ESC until you reach the home screen.
WARNING
DO NOT set both time values to 0; this may cause damage to the controller!
Lighting Duration Timer for
Lighting Modes 2 & 3
Main Menu -> Timer Setup

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 10
Pump Operation
The pump circuit is operated by a repeat cycle timer with separate time settings
for day and night. This allows the pumps to be operated intermittently or
constantly 24hours a day, only during the day, or once per day.
See the “Timers Settings & Options” section above.
Acceptable Values: 00:00 to 99:59
Example:
Many hydroponics systems require the pumps to be circulated frequently in the
day and less frequently at night. In this case the “Pump Day” cycle timer would
have long on times and short off times, while the “Pump Night” cycle timer
would have short on times and long off times.
In other situations a pump may need to operate all day long while remaining off
all night, in this case, set the “Pump Day” timer to constant on and the “Pump
Night” timer to cancel.
See the “Timers & Settings” section above.
Liquid Sensor:
A liquid level sensor is optional and plugs into the “Shutdown” port on the side of
the controller. When activated, the controller shuts down all equipment for the time
specified by the “Re-Start Delay” timer.
Other float sensors and configurations are available; please consult the factory.
Configuration Menu
High Temp Limit
Set the maximum allowable temperature before shutting down the
lighting output. The remaining outputs continue to operate in their
current mode.
Re-Start Delay Timer
This timer activates when ever the shut-down sensor is activated. All
equipment is shut-down until this timer completes.
Anti-Short Cycle Timer
This timer prevents the short-cycling of lighting equipment. When the
lighting output is shut off, this timer prevents it from being re-
activated for a period of time. This prevents accidental hot-starting of
lamps.
Equipment Delay Timer
This timer prevents equipment from operating when the lights are starting to reduce
current load. Set timer to 00:00 to skip delay.
Acceptable Values: 00:00 to 99:59
Day Cycle Time
r
Night Cycle Timer
Flood Senso
r
Main Menu
-> Timer Setup
Hi-Temp Lighting Shut Down
& Shut-Down Sensor Timer
Main Menu -> Next Menu
-> Configuration
Lighting Anti-Short Cycle Timer &
Lighting Start-Up Equipment Delay
Main Menu -> Next Menu
-> Configuration

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 11
CO2Control
CO2 can be operated by an internal injection cycle timer or by PPM sensor control. To operate by PPM sensor, plug the sensor
cable into one of the two sensor cable ports. When the CO2 sensor is connected, the internal injection timer is disabled.
CO2 is dispensed only when the controller is in “day” mode.
When using the injection/interval timers, CO2 is dispensed in a cycle of MM:SS on, and MM:SS off.
The hysteresis is added the set point and acts as the point at which the controller ceases to operate CO2.
Ventilation Interrupt:
CO2 will not dispense when the ventilation output is active.
If the temperature or humidity rises above either set point, the CO2 cycle will be cancelled until the conditions return to
acceptable levels. If a time is set in the “Ventilation Delay” timer then ventilation will be prevented until the time has been
reached.
Timer Based Operation
CO2 On Time: The time in MM:SS for the solenoid valve (or CO2
generator) to remain on.
CO2 Off Time: The time in MM:SS between CO2 emission cycles.
Vent. Delay after CO2 Inject: The time in MM:SS to prevent
ventilation equipment from activating after the “CO2 Inject ON” Time
has completed.
Acceptable Values: 00:00 to 99:59
PPM Sensor Based Operation
To operate CO2 equipment based on the PPM sensor, connect the
sensor to either sensor cable port. Navigate to the “Climate Setup”
menu and set the CO2 PPM set point and hysteresis.
The “Vent Delay after CO2 Inject” timer will operate each time the CO2
output is activated.
Acceptable Values: +000000 to +002000
Notice!
Entering a “min” value greater than 2000ppm will cause CO2 to operate continuously!
Entering a “max” value greater than 2000ppm will prevent Ventilation from activating due to high CO2 level!
(Ventilation will continue to operate for high temperature/humidity.)
Main Menu -> Timer Setup
Main Menu
-> Climate Setup
CO2 Injection Timer
CO2 Ventilation Delay after Injection
CO2 PPM Set point & Hysteresis

© 2006-Present Agrowtek Inc.
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PC Communication & Data Logging
Connecting Data Communication Cable
GrowControl can be linked to a PC for remote monitoring, setup and data logging. A Communication cable (available from
Agrowtek) and the free GrowControl software are required to use these features.
The data communication cable connects to a PC via a standard RS-232 serial communication port.
Connecting Cable:
1. Remove the dummy plug from the front of the MASTER controller data port.
2. Connect the data communication cable to the MASTER controller data port.
3. Connect the data communication cable to the PC’s RS-232 serial COM port.
The communication cable can be extended up to 50ft with a male-female extension cable (available from Agrowtek.)
PC Requirements
•RS-232 DB-9 Serial Com Port
•333+ MHz processor
•256+ MB Ram
•Windows® XP, .Net 3.0
Running the Software
No installation is necessary; simply unzip the GrowControl.zip file or copy the files off of the provided CD (included with data
communication cable kit) onto your desktop or any other suitable location. Open the GrowControl.exe file to open the
GrowControl software.
Note: Data logging will not work from a CD; .csv data log files are written to the program’s root directory. Copy the files on
the CD to your computer’s hard drive.
Open
“GrowControl_VX.X.X.exe”
(Double Click)

© 2006-Present Agrowtek Inc.
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Monitor Tab
Connecting to the controller:
1. Select a connection port;
most PC’s will use COM1.
2. Click the Connect button.
3. The software will connect and begin
monitoring sensors & equipment status
and read current settings.
4. If you get a message box with
“COM ERROR” then you selected
the incorrect COM port or the port
is in use by another application.
Maintenance Stop:
The maintenance stop is provided as a
convenient way to shut down all
outputs for maintenance or other
purposes.
Note: The controller must be manually
started and stopped from the controller
when initially commissioned. The
controller start/stop menu functions
independently of the software
maintenance stop!
Sensor Readings Display:
Temperature Display:
The temperature is displayed by default in Fahrenheit (°F.) To display temperature in Celsius, click the °C radio button.
Note 1: Select your preferred display type before starting data logging or live trending to ensure units are correct.
Note 2: Climate settings are always entered in units of °Fdue to the increased scale precision.
Humidity Display:
Humidity is displayed in units of percent relative humidity (%RH) with a range of 0-100%.
VPD Display:
VPD (Vapor Pressure Differential) is a combination measurement of temperature and humidity which compares the amount of
moisture in the air with the maximum holding capacity. This measurement is preferred by many growers as the values more
closely relate to the effects on plants. Low VPDs correspond to cool, moist environments while high VPDs signal hot, fry
conditions. Ideal ranges for typical greenhouses are between 0.45kPa and 1.25kPa with 0.85kPa as an ideal range.
VPD is calculated by the software using the Arrhenius equation and can be displayed in units of kPa (Kilo-Pascals) or psi
(pounds per square inch) by selecting the appropriate radio button in the “VPD Display” box.
Note: Select your preferred display type before starting data logging or live trending to ensure units are correct.
CO2 Display:
CO2 is displayed in units of ppm (parts per million) with a range of 0-2000ppm.
Light Display:
Light levels are displayed in units of % (percent) with a range of 0-100%. 0 corresponds to complete darkness, 10% is light
generated by a near by lamp, 100% is bright sunlight.
DANGER!
Maintenance stop and software manual operation are NOT to be used in life-threatening conditions!
Always manually disconnect equipment from the controller during critical circumstances!
Temperature
Display
Selector
Day/Night
Mode
Dis
p
la
y
Connect /
Disconnect
Com Port
menu Maintenance Stop
Manual
On/Auto/Off
Buttons
Sensor
Readings
Controller Time
& Date
Equipment Status
VPD Display
Selector
Exit
Button

© 2006-Present Agrowtek Inc.
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Outputs Control & Display:
Status: Indicates the current operational status of the output (On/Off.)
Operation:
Auto: Operate per controller’s commands.
On: Turn on equipment regardless of controller’s commands. (May cause other equipment to shut down as required.)
Off: Turn off equipment regardless of controller’s commands. (May cause other equipment to start-up as required.)
Hit the “Send >” button to send your on/auto/off settings to the controller. The current status of the equipment should change
as required to match your settings.
Climate Settings Tab
Settings the climate settings on the controller is as easy as entering the values and clicking “Send >.” A preview of how the
controller will operate your equipment according to your settings appears next to the settings text boxes. This allows you to
play around with hysteresis settings and climate set points to find the right control strategy.
Set Point
When equipment
comes on
When equipment
goes off
Send the settings
on this page only
to the controller
Refresh with current
values from the
controller
Humidity
Mode
Selector

© 2006-Present Agrowtek Inc.
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CO2 Settings Tab
The settings on this tab are for use with a CO2 PPM sensor. Set the minimum CO2 level (level to activate co2 injection
equipment,) maximum CO2 level (level to activate ventilation equipment,) and the hysteresis level. The hysteresis setting is
mutual between the CO2 injection and ventilation equipment.
Lighting Tab
The settings on this tab control how GrowControl will operate lighting equipment. (See the “Lighting Mode” section above.)
The solar set point tells the controller when to differentiate between night and day. The hi-temp shut-down turns off lighting
equipment when the temperature is exceeded to reduce the heat load; all other equipment remains active in the proper
day/night mode.
Minimum
CO2 level
Hysteresis
(Dead band)
Maximum CO2
level
Solar Set
Point
Lighting Mode
Selectors
Maximum
temperature
before lighting
shut-down

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 16
Calibration Tab
The settings on this tab control the calibration offsets of the temperature, humidity and CO2 sensors. The current reading is
displayed below the offset box; press the “Send >” button and the value shown should reflect the calibrated value.
Clock Tab
Set the controller’s real-time clock with the current time and date as well as specify a daylight savings time scheme.
Note: Values do not refresh continusouly from the controller; settings shown are from start-up or the last setting. Press the
“Refresh” button to read and disply the current values in the controller.
CO2 Offset
Temperature
Offset
Humidity
Offset
Current Value
Custom DST
Settings Set Controller Time
(24-hour format)
Daylight Savings
Time Mode
Set Controller Date
Send Date/Time
Settings to Controller
Send DST
Settings to
Controller

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 17
Data Logging Tab
The data logging tab provides functions for logging data to .csv files for long term logging, or a live trend graph wich can store
up to six hours of data.
Trend Graph
The trend graph is started (and stopped) with the Start/Stop button. Once
stopped, the graph will remain on the screen until the Start button is pushed
again or until the program is closed.
The “X Axis Range” setting determines how many seconds to display on the X
axis. This value can be changed while the trend graph is active.
To zoom, save, copy or print the trend graph, right click anywhere on the
graph and a menu with these options will appear.
Data Logging
To start data logging, enter a logging interval (seconds) and press the Start button. The file will be named according to the
date and time the log file was created and will be stored in the GrowControl program directory.
The .csv file can be easily opened, viewed and plotted in any spreadsheet software package such as Excel® or OpenOffice.org.
Current log file
name
Start/Stop live
trending graph
Current log line
Display range of
trend graph
Seconds between
log samples
Start/stop logging
to .csv file

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 18
Cleaning & Maintenance
This controller does not require maintenance.
DO NOT open the controller enclosure. There are no user serviceable parts inside the controller.
The controller may require cleaning with a damp, soft cloth. Do not spray the controller with cleaners or use cleaners which
may be harmful to plastics. Do not use abrasive detergents, petrol, alcohol or solvents.
Cleaning the Sensor Foam Air Filters
The climate and CO2 PPM sensors contain sampling fans which draw a continuous volume of air over the sensor to ensure
accurate readings. The fans are equipped with a 30ppi foam air filter to prevent debris particles from entering the sensor
enclosure and damaging the sensors. When loaded, these filters require cleaning with mild soap and water.
DO NOT operate sensors without an air filter! Heavy contamination due to poor filter maintenance will void your sensor
unit’s warranty.
To Clean the Foam Filter:
1. Disconnect the sensor cable from the controller
2. Disconnect the sensor cable from the sensor
3. Using a small screwdriver, carefully pry one corner of the filter grate and remove (A)
4. Remove the foam air filter and wash with clean water or replace (B)
5. Replace the foam air filter and the grate (C)
Replacing the Temperature/Humidity Sensor
The temperature/humidity sensor may become damaged over time due to strong chemical concentrations in the air such as
ammonia and other fertilizers. In environments where this is prevalent, sensor replacement is recommended annually.
To Replace the Temperature/Humidity Sensor:
1. Disconnect the sensor cable from the controller.
2. Disconnect the sensor cable from the sensor.
3. Remove the four screws from the rear cover.
4. Remove the rear cover being careful not to
damage the photo-cell or pull the fan wires.
5. Pull the sensor out of the quick-connect terminal
block.
6. Replace the sensor in the proper orientation by
placing into the terminal block vertically and then
bending down against the circuit board as shown.
7. Replace the rear cover being careful not to
damage the photo cell & route fan wires out
of the way of the fan!
8. Re-install the four screws; do not over-tighten!
9. Ensure the fan operates properly (not blocked.)
Temperature/
Humidity
Sensor
Photo Cell
Fan Terminals
A. Remove filter grate B. Remove & clean filter C. Replace filter and grate

© 2006-Present Agrowtek Inc.
www.agrowtek.com | 200 N Anets Dr. Northbrook, IL 60062 | [email protected] 19
Specifications
Input Voltage 100-240 VAC 57-63Hz
Controller Power Consumption 25 Watts (Max)
Maximum Current Capacity 15 Amps @ 120VAC
Overload Protection 15 Amp thermal circuit breaker w/reset button
Operating Temperature 32-131°F (0-55°C)
Maximum Humidity 95% RH (Non-condensing)
Temperature Control Range -22-185 °F
Temperature Resolution ± 1 °F
Temperature Accuracy ± 1 °F
Humidity Control Range 0-100 %RH
Humidity Resolution ± 1 %RH
Humidity Accuracy ± 2 %RH
Typical Response Time 25 Seconds
Warm-up Time 3-5 Minutes
OUTPUT 1: Lighting Circuit 8 Amps @ 120VAC
Lighting Timer Digital 24hour real time clock w/Photo Cell
OUTPUT 2: Ventilation Circuit 8 Amps @ 120 VAC
Ventilation ON timer Night 00:00 - 99:59 MM:SS
Ventilation OFF timer Night 00:00 - 99:59 MM:SS
OUTPUT 3: Heat Circuit 8 Amps @ 120VAC
OUTPUT 4: Humidification Circuit 8 Amps @ 120VAC
OUTPUT 5:Pump Circuit 8 Amps @ 120 VAC
Pump ON timer Day 00:00 - 99:59 MM:SS
Pump OFF timer Day 00:00 - 99:59 MM:SS
Pump ON timer Night 00:00 - 99:59 MM:SS
Pump OFF timer Night 00:00 - 99:59 MM:SS
OUTPUT 6: CO2 Circuit 8 Amps @ 120 VAC
CO2 On Timer 00:00 - 99:59 MM:SS
CO2 Off Timer 00:00 - 99:59 MM:SS
Fan delay off time 00:00 - 99:59 MM:SS
PPM Sensor Range 0-2,000 PPM
PPM Sensor Set Point 0-2,000 PPM by 1 PPM
PPM Sensor Hysteresis 0-255 PPM by 1 PPM
PPM Sensor Accuracy ±100 PPM or 7%
PPM Sensor Response Time Less than 1 minute
PPM Sensor Warm-Up Time Less than 2 minutes
PPM Sensor Operating Temperature 60-90°F (15-32°C)
PPM Sensor Operating Humidity 0-95% RH (Non-condensing)
PPM Sensor Altitude Above Sea Level 0-10,000 Ft
Relay Operation 100,000 mechanical / 10,000,000 electrical