Temperature-Based Tunnel Doors - Airstream Cumberland EXPERT LA User Manual

EXPERT LA
6.4.2

Temperature-Based Tunnel Doors

Beginning of tunnel ventilation
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 doors during the opening time
associated with that stage. The controller then acti-
vates tunnel fans when half of the opening time has
elapsed. The activation of every consecutive fan
stages causes the tunnel door 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 only be used
if age-based functions are enabled in the Installa-
tion Setup (section 4.5).
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 (sec. 4.7.1).
Tunnel Door
Opening (time)
60 sec.
30 sec.
Closed
Opening times
The user must associate an opening of the tunnel
door to each tunnel fan stage. When a tunnel fan
stage starts, tunnel doors open according to the
opening time associated to that stage. Opening
times are set separately for each tunnel door.
Closing vent doors (inlets) in tunnel ventilation
If vent doors (inlets) remain opened in natural ven-
tilation, you must define the tunnel stage at which
they must close.
Reference temperature in tunnel ventilation
The selection of probes that is used to measure
the room temperature can be changed in tunnel
ventilation to compensate for changes in airflow
patterns that can distort the room temperature cal-
culation. The user must select at what fan stage
the second probe set starts being used.
Opening of Tunnel Doors
as a Function of Temperature
Startup of stage #x:
the tunnel door
opens according to
the opening time
associated to
fan stage #x
Startup of stage #x + 1:
the tunnel door
opens according to
the opening time
associated to
fan stage #x + 1.
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