Sentinel CHHC-1 Instruction Manual - page 7
display reads
HEAt_ _ F
use the Up or Down buttons to change the
settings and then press Enter to accept the new setting.
Setting the CO2 PPM level:
Set CO2 PPM
To change the CO2 PPM setting, press the Set CO2
PPM button on the keypad. Use the Up or Down button to change the
setting, example
1500_PP
. Press Enter to accept the new setpoint.
Setting the CO2 / Temp Interlock:
Interlock CO2 / Temp
You may choose to have the CO2 output
disabled when the Cooling output is ON,
CoNNeCt
, or to let them work
independently,
SPLit
. (See Understanding Interlocks) Pressing the Inter-
lock CO2—Temp button. will display the current setting. Use the Up or
Down buttons to change the display to the desired mode. Press Enter to
accept the change.
Setting the CO2 Dead-band:
Set CO2 Deadband
The CO2 Dead-band can be set by the user.
The dead-band is the range of measurement that the control will allow
the CO2 level to vary by. Press the CO2 Deadband button on the keypad
to display the current setting. It is suggested to leave the setting at
0050_PP
. If necessary use the Up or Down buttons to change the display
to the desired setting. Press Enter to accept the change.
Recalling minimum and maximum recorded values:
Min / Max Recall
The user can recall the minimum and maximum
recorded values for the Temperature, Humidity and CO2 levels easily.
Press the Min / Max Recall button on the keypad. Each time the button
is pressed, the display will advance to show in order: Max Temp / Min
Temp / Max Humid / Min Humid / Max CO2 / Min CO2. Each
recorded value is identified with a small green LED on the front of the
unit. When desired the values can be reset by pressing and holding the
Enter / Reset button for 2-3 seconds.
Activating Fuzzy-logic CO2 mode:
Fuzzy-logic mode
There is no independent button used to activate
the Fuzzy Logic mode. Pressing and holding the Enter / Reset button
for 5 seconds will allow you to select generator mode
gEnErAt
for CO2
generators or Fuzzy Logic mode
LogIcoN
when using compressed CO2.
Use the Up or Down buttons to change the display to the desired mode.
Press Enter to accept the change. (See CO2 control modes section)
The second Interlock is for Humidity and Temperature. They can be
selected to be either connected together into a single control, or split
into separate controls. The
Humid / Temp interlock
allows the user to
decide.
Interlock Humid / Temp
* Using ventilation fans for cooling and dehumidification.
If you are using ventilation fans to keep the growing area cool and also
to remove humidity, you need to be able to activate the ventilation fan
when the temperature rises OR the humidity has increased to the set-
points. By setting the
Interlock Humid / Temp
to connect, the Cooling
device will be turned ON when the temperature or humidity sensor de-
tects a rise in EITHER of them. The warm and humid air inside the
growing area would being replaced by dry and cooler outside air from
outside the area. If you are NOT using a single ventilation fan to both
cool and the dehumidify, you would select the
Interlock Humid / Temp
mode to split. (see below)
Using separate devices for cooling and dehumidification.
If you are using a fan or air conditioner to keep the growing area cool
and a dehumidifier to remove humidity, the Cooling and Humidity
functions need to be independent. In this situation the cooling device
will be activated when the temperature rises. The humidity device will be
activated if the humidity level gets too high. By setting the
Interlock Hu-
mid / Temp
to split, each device is controlled independently. The Cool-
ing device will be turned ON when the temperature gets too warm and
the humidity device will be turned ON when humidity gets too high. If
you using a single ventilation fan or air conditioner to both cool and to
dehumidify, you would select the
Interlock Humid / Temp
mode to
connect. (see above)
Using separate devices for cooling and humidification.
If you are using a fan or air conditioner to keep the growing area cool
and a humidifier to increase humidity, the Cooling and Humidity
functions need to be independent. In this situation the cooling device
will be activated when the temperature rises. The humidity device will be
activated if the humidity level gets too low. By setting the
Interlock Hu-
mid / Temp
to split, each device is controlled independently. The Cool-
ing device will be turned ON when the temperature gets too warm and
the humidity device will be turned ON when humidity gets too low. It is
unusual to have to increase humidity in a closed growing area so this
example is rarely used. (see other examples above)