AP Expert VT-110, User Manual

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12
Tunnel Curtain
Topics Covered in this Chapter
▪ Tunnel Curtain: How it Works
▪ Configuring Tunnel Curtain Settings
Tunnel Curtain: How it Works
The activation of tunnel ventilation is linked with the activation of a user-defined fan stage: when the start
temperature of that fan stage is reached, the controller opens tunnel curtains during the opening time
associated with that stage. The controller then activates tunnel fans when half of the opening time has
elapsed. The activation of every consecutive fan stages causes the tunnel curtain to open further.
Minimum age
A minimum age can be specified to avoid entering in tunnel ventilation when the animals are too young.
This feature is optional and can be turned off if the minimum age is set to
Off .
Minimum outside temperature
A minimum outside temperature can be specified to avoid entering in tunnel ventilation when it is too cold
outside. This feature is optional and can only be used if an outside temperature probe is enabled.
Tunnel openings
The user must associate an opening time (or %) to each tunnel fan stage. When a stage starts, the tunnel
doors open according to their respective opening time (or %) associated with that stage.
The tunnel openings can either be displayed positions (%) or as a time values.
Reference temperature in tunnel ventilation
The selection of probes that is used to measure the room temperature can be changed in tunnel ventila-
tion to compensate for changes in airflow patterns that can distort the room temperature calculation. The
user must select at what fan stage the second probe set starts being used. This second probe set is only
used if the temperature sensed by set 2 is higher than the temperature sensed by set 1.
Tunnel curtain in clean mode
The controller automatically closes the tunnel curtain when the clean mode is on.
Tunnel curtain in brooder
If brooder is on and the option Use Interlock? is set to Yes in the Installation menu, the tunnel curtains
cannot be opened.
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