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EXPERT WW rev.12
EXPERT WW
Opening of Tunnel Doors
as a Function of Temperature
Startup of stage #x + 1:
The tunnel door
opens according to
the opening time
associated to
fan stage #x + 1.
Startup of stage #x:
the tunnel door
opens according to
the opening time
associated to
fan stage #x
Stage #x
Open Time
Closed
30 sec.
60 sec.
Set Point
Stage #x+1 Open Time
Fan
stage #X
Stop T°
Fan
stage
#X+1
Stop T°
Fan stage
#X+1
Start T°
Room T°
Tunnel Door
Opening
(time)
Fan stage #X
Start T°
(first tunnel
stage)
lower than the low pressure set point. Refer
to the chapter 5 to set the static pressure
set points.
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).
Minimum age:
A minimum age can be speci-
fied 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 Installation Setup
(section 4.5).
6.4.2. Temperature-Based Tunnel
Doors
Beginning of tunnel ventilation:
The activa-
tion 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 activates tun-
nel 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 speci-
fied 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 Installation 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).
Pre-opening:
The pre-opening delay is used
to slightly open tunnel doors before the ac-
tivation of tunnel fans. The pre-opening is
performed at the start-up of tunnel ventila-
tion (i.e., when the fan stage which activates
tunnel ventilation starts).
Wind effect delay:
When the pressure level
exceeds the high or low static pressure set
point, tunnel doors wait for the end of the
“Wind Effect Delay”
before moving. Tunnel
doors will only move if the high or low pres-
sure condition is still valid after the delay has
elapsed. This way, tunnel doors do not move
if a wind draft causes fleeting changes in the
pressure level.
Closing vent doors (inlets) in tunnel ventilation:
If vent doors (inlets) remain opened in natural
ventilation, you must define the tunnel stage
at which they must close.
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 ventil.:
If vent doors (inlets) remain opened in natural
ventilation, you must define the tunnel stage
at which they must close.
Reference temperature in tunnel ventilation
The selection of probes that is used to mea-
sure the room temperature can be changed in
tunnel ventilation 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.
