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Warning:
“Use For Proportional Control” should be set to NO for this fan, if you set one of the
Looking At settings to an inlet that uses the number of running fans to determine the
opening size. Having this set to YES can cause the fan to turn on and off and the inlet
to open and close constantly.
Stir, Sidewall, Tunnel, Pit and Ridge Fan Settings - continued
In buildings where curtains, inlets and fans are used, it may be desirable to inhibit a fan group when any curtain\
inlet is open enough to provide natural ventilation. This is especially useful in applications where ridge fans are used.
This menu item only appears when a position sensor or whisker switch is installed on at least one curtain or inlet and
there are no active out-of-position alarms. Input an opening size at which the fan group should be disabled.
VARI - TUNNEL FAN GROUP #1 SETTING
Z1-S01
Fans OFF at Curtain Opening of: 24”
This menu item is an extension of the Fans Off menu item described above. When the temperature reaches the value
you input here, the fan group resumes operation according to its time and temperature settings. The temperature
input here changes daily if a temperature ramp table is set up.
VARI - TUNNEL FAN GROUP #1 SETTING
Z1-S01
Fan OVERRIDE Curtain Open Temp: 95.0
By default the Fans Off setting is determined by any curtain. If any curtain opens above the Fans Off setting, the fan
will shut off. By default, inlets are not considered to determine when the fans should turn off.
VARI - TUNNEL FAN GROUP #1 SETTING
Z1-S01
Looking At(1): All Sidewall Curtains
It is possible to change this default behavior. Set the Looking At menus to select up to 4 different
curtains and inlets to be used to determine if the fan should be running. Only curtains/inlets that have a
position sensor and\or a whisker switch attached can be used.
VARI - TUNNEL FAN GROUP #1 SETTING
Z1-S01
Looking At(1): Side Curtain#1
VARI - TUNNEL FAN GROUP #1 SETTING
Z1-S01
Looking At(2): Sidewall Inlet#1
VARI - TUNNEL FAN GROUP #1 SETTING
Z1-S01
Looking At(3): Ridge Vent#1
VARI - TUNNEL FAN GROUP #1 SETTING
Z1-S01
Looking At(4): Not Used
A good example for using this would be to allow Pit fans in a hog barn to turn off when the inlets are open enough to
allow circulation of air.
If using a whisker switch, the fan will shut off at this opening size, based on the internal calculations of
the controller, regardless of what the Validation values of the whisker switch are set at and when the
Whisker switch actually changes states. The Whisker Switch Validation values can be set to any values
you want to cause an alarm and turn the fan back on. However, the Whisker Switch Validation values
should be set around this value for proper operations.
Curtain Open Size Inhibits Fans
Override Fans Off
Using certain curtains\inlets to determine if fan should run