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Normal static-pressure or proportional control resumes once the timed cycle begins.
Sidewall, Tunnel & Ceiling Inlet Settings - continued
Purge Opening Size
The inlet can be used as a purge opening for purge fans. This menu item appears only if you have entered purge
settings in the Purge Settings menu. Input zero to disable the inlet during the purge function. The purge opening size
must be large enough to allow at least three seconds of movement.
TUNNEL INLET GROUP #1 SETTING
Z1-S01
Purge Opening Size (Inches): 6
Pre-Open Timer
This menu item allows static-pressure-controlled or proportional-controlled inlets to open in advanced of a timed
fan turning on (“timed” includes minimum ventilation cycles). Input the number of seconds, up to one minute, the
inlet should start opening prior to the start of a timed fan. The pre-open time alleviates the spike in static pressure
that might otherwise occur when fans turn on before inlets are adequately open.
TUNNEL INLET GROUP #1 SETTING
Z1-S01
Pre-Open Timer: 0:30
These two settings allow the setting of the minimum opening size of the inlet before the controller will enter or exit
tunnel mode. When the controller starts to enter Tunnel mode, any inlet open less than their "Tunnel Entry Size" will
open to the Entry size setting. Any inlet that is open more than their "Tunnel Entry Size" will start to close, but will
not close below the Entry size. Once all the curtains and inlets are open to at least their Entry size, the controller will
go into Tunnel mode. When the controller starts to exit tunnel mode, the curtains and inlets will operate the same
way as they did when entering Tunnel, but using the "Exit Size" value for its minimum opening size, before exiting
tunnel mode.
All the curtains and inlets will open to their set sizes regardless of their operating modes.
Once Tunnel mode or Natural Vent mode is entered, the curtains and inlets will operate
based on their operating modes again.
Tunnel Enter and Exit Opening sizes
TUNNEL
(or SIDEWALL, CURTAIN, etc)
INLET GROUP #1 SETTING Z1-S01
Tunnel Entry size: 10 Exit Size: 5
Perform Re-Sync at 0:00
The inlets readjust automatically with the controller when they open or close completely. When the device is within
1”, or within three seconds of travel time, of fully open or closed, the channel is left on, allowing the limit switch of
the device to stop the moving of the device. This allows both the inlet and controller to synchronize their positions.
However, you can have the device perform this re-synchronization manually once a day if needed. Set “Perform
Re-Sync at” to the time of day to perform the re-synchronization. If the device is less than 50% open at the specified
time, the controller will turn on the Close relay for the full amount of the Close Travel time of the device. If the device
is more than 50% open, the Open relay will turn on for the full Open Travel time. This will make sure the device’s
actual opening size matches the controller’s calculated opening size. Set the value to 0:00 to disable this feature. Set
it to 24:00 to have it run at midnight. DISPLAY IS SHOWN ON NEXT PAGE
• If the device is moving when Re-sync is supposed to happen, the Re-sync operation will wait
until the device has stopped moving before it will turn the relay on for the full travel time.
• The Re-sync should be done at a time of day that will have the least effect on the environment
of the barn, such as early morning when it is less likely a lot of fans will be running.
• If the device seems to be out of sync often, check to make sure the manual winch has been
properly adjusted and the travel times of the device are accurate. Also check to make sure
the device settings allow the device to fully close or open at some point (Example: have at
least one “Fans On” setting at 0.0” opening size and one setting at full opening size). INLET
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