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Inlet Movements at Power Up
When the controller is powered after a reset or power outage, inlets controlled by static pressure will:
• Go into their tunnel mode setting if the temperature is above the Tunnel Entry temperature.
• Fully close if the outside temperature is 10 degrees Fahrenheit (5.5 degrees Celsius) or more below the setpoint
temperature. Then the inlets will open to their proper opening size.
• Fully open, if the outside temperature is not more than 10 degrees Fahrenheit (5.5 degrees Celsius) below the
setpoint temperature. Then the inlets will close to their proper opening size.
The controller checks the inside air sensors if no outside air sensor is installed.
If there is more than one sidewall curtain being used during Natural mode, it is possible to restrict the curtains used
for this feature. Up to four sidewall curtains can be selected. If no curtains are selected, then the feature will take
effect as soon as any curtain opens to the curtain opening size. If some curtains have been set, then the feature will
only take effect when one of the selected curtains opens to the curtain opening setting, regardless of the opening
sizes of the unselected curtains.
Looking At
Sidewall, Tunnel & Ceiling Inlet Settings - continued
Looking at (1): Z1-S01
All Sidewall Curtains
An inlet will still perform its Re-Sync function as scheduled, even if the “Curtain Override” feature is in
effect. In addition, while a curtain is performing its Re-Sync or Exercise routine, the inlet could possibly
move due to the “Curtain Override” feature.