OPERATING INSTRUCTIONS
CO
2
PPM SETTINGS
CO
2
LEVELS: Click the CO2 PPM knob and turn to set the PPM target. Click again to confirm the
setting.
CO
2
DEADBAND: Click the DEADBAND knob and turn to set the desired deadband setting. Click
again to confirm the setting.
Example:
For CO
2
increase mode, if setpoint=1000 PPM and deadband=50 PPM, the CO
2
output will
start to work at or below 1000 and turn off at 1050 PPM. For CO
2
decrease mode, the fan will start at
or above 1000 PPM and turn off at 950 PPM.
MIN/MAX RECALL: Click and hold the CO
2
PPM and DEADBAND knobs simultaneously to display
the CO
2
min/max PPM record. The display will show L XXX, H XXX. The screen will return to normal
display after 5 seconds (or immediately if you click both knobs simultaneously again), and the
record will be reset.
CALIBRATION: Place the CO
2
sensor outdoors, press both knobs for 3 seconds, display screen reads
CAL/400, if you need to change the calibration level, turn the left knob. Keep the sensor from direct
sunlight and any breathing. Allow it 10 minutes to stabilize the PPM reading. The Screen will return
to normal display once the calibration is complete.
CO
2
& TEMP LOCK/UNLOCK SWITCH
LOCK: This setting will not allow the CO
2
and Temp outlets to run simultaneously. The CO
2
outlet
will always be deactivated when the Cooling outlet is activated On. Lock setting is recommended
for rooms applying CO
2
that are also operating an exhaust fan for temperature control. This setting
minimizes CO
2
loss when the exhaust fan is operating.
UNLOCK: The CO
2
enrichment device and any cooling device that is plugged in are independently
controlled.
TEMPERATURE SETTINGS
The unit offers both day and night temperature control. Select either the heating or cooling mode
option.
DAY TEMP SETTING: There is a Day Cooling set point and a Day Heating set point.
1. To set the Day Cooling, Click the DAY TEMP knob. “COOL” will be displayed. To change the
setting, turn the DAY TEMP knob to select your desired temperature. Click again to accept the
new setting.
2. “HEAT” will then be displayed. Turn the DAY TEMP knob to select your desired setting, then click
the knob again to save the new setting.
NIGHT TEMP SETTING: Night temps are set exactly the same way as described above for day
temps, but using the NIGHT TEMP knob this time.
TEMP MIN/MAX RECALL: Press the DAY TEMP and NIGHT TEMP knobs simultaneously to recall the
min/max temperature record.
TEMP UNIT: Press and hold the DAY TEMP and NIGHT TEMP knobs simultaneously knobs for 3
seconds, then turn the DAY TEMP knob to select the desired temperature unit (°F or °C). Press both
simultaneously again to confirm the setting.
HUMIDITY & TEMPERATURE (RH% & TEMP) LOCK/UNLOCK SWITCH
LOCK: This setting locks both the temperature and humidity outlets together making them operate
simultaneously. Example: if the sensor detects a reading outside of the programmed Temperature
setting the unit will activate both Temperature and Humidity outlets at the same time. Use this
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