11
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XT-70 Control Panel 11
Refrig / CO2: The system is in Refrigeration and the CO
2
level is above CO2 setpoint.
The fresh air doors are being used to purge the CO
2
.
Door Defrost: The system is in Cooling and the fresh air door defrost has been
triggered. The doors are closed and the return air is being used to
defrost them. This should only be used during extreme times of cold
Outside air.
Heat: This mode is used to turn on return air heaters when the system is
running in Cooling, the doors are closed and the plenum temperature
has drop below the Setpoint minus the heat differential.
Cooling / Dehumid: The system is in a normal Cooling mode and has detected high
humidity. In Onion mode, the burner is on low fire to bring in more fresh
air. In Potato mode, the return air heater is used to dehumidify.
Refrig / Dehumid: This is an Onion mode. The system is in a normal Refrigeration mode
and the burner is being run on low fire.
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