48
EXPERT LA rev.00
EXPERT LA
6.4
Tunnel Doors
The controller can control the opening of 2 tunnel
doors as a function of the static pressure level or
as a function of the average temperature in the
room. Refer to section 4.5 of this manual to choose
the proper operating mode.
6.4.1
Pressure-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 starts controlling tunnel doors accord-
ing to the static pressure level. It opens the doors
when the pressure level exceeds the high pressure
set point and closes them when the pressure level
is 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 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).
Pre-opening
The pre-opening delay is used to slightly open tun-
nel doors before the activation of tunnel fans. The
pre-opening is performed at the start-up of tunnel
ventilation (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. Tun-
nel doors will only move if the high or low pressure
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 ven-
tilation, you must define the tunnel stage at which
they must close.
LO PRESSURE
SET POINT *
Static
Pressure
HI PRESSURE
SET POINT *
T
H
E
T
U
N
N
E
L
D
O
O
R
O
P
E
N
S
T
H
E
T
U
N
N
E
L
D
O
O
R
D
O
E
S
N
O
T
M
O
V
E
WIND
EFFECT
DELAY
WIND
EFFECT
DELAY
T
H
E
T
U
N
N
E
L
D
O
O
R
C
L
O
S
E
S
The tunnel door
starts closing after
the Wind Effect
Delay has elapsed.
The tunnel
door stops
closing
The tunnel
door stops
opening
The tunnel door
starts opening
after the Wind
Effect Delay
has elapsed.
Time
Opening of Tunnel Doors
as a Function of Static Pressure
45
EXPERT LA rev.00
EXPERT LA
6.3.2
Natural Ventilation Settings
Select:
Main menu
Start/Stop*
Natural**
Curtain #X
*
A password may be required to access this menu (sec. 4.2).
** Accessible if at least 1 natural ventilation curtain is enabled
in the Installation Setup (section 4.5).
•
Set the following parameters:
(Refer to previous sections to get further informa-
tion on these parameters)
Initial Open at
Set the temperature at which the curtain
opens for the first time. The curtain opens
during its initial moving time at that moment.
Start Close at
Set the temperature below which the cur-
tain starts closing in timer mode when the
controller is in natural ventilation.
Start Open at
Set the temperature above which the cur-
tain opens according to a timer when the
controller is in natural ventilation.
Initial Time
The curtain opens during its initial opening
time when the controller enters in natural ven-
tilation. This opening time can be adjusted
from 0 to 900 seconds (15 minutes).
Open / Close / Off Time
Set the opening and closing timers of the cur-
tain (the Off time is common to both cycles).
The open, close and off times can be adjusted
from 0 to 900 seconds (15 minutes).
Wind Delay
When the controller is in natu-
ral ventilation and temperature falls below
the "Start Close At" temperature or rises
above the "Start Open At" temperature, the
curtain only starts moving after the wind de-
lay has elapsed. This way, the curtain does
not move when wind drafts cause sudden
temperature changes. Set the wind delay to
the desired value. Adjustable from 0 to 900
seconds (15 minutes).
Tunnel Close Delay
(Factory Setting)
This delay is launched at the beginning of
the first tunnel stage. Once it has elapsed,
the controller closes the natural ventilation
curtain.
Continuous Delay
(Factory Setting)
The natural ventilation curtain opens during
this delay when the controller returns in natu-
ral ventilation (when tunnel ventilation ends).
Purge move time
This is the amount of time required to open
the curtain during a purge cycle (see sec.
6.3.5). Set this parameter separately for
each curtain.
Accessible if the purge option is enabled in the
Installation Setup (section 4.5).
Main menu
Start/Stop
Natural
Curtain 1
Natural Curtain 1 Settings
Use to navigate
Initial Open at
80.0 °F
Start Close at
78.0 °F
Start Open at
82.0 °F
Initial Time
20 sec
Open Time
15 sec
Close Time
15 sec
Off Time
15 sec
Wind Delay
10 sec
Tun.Close Dly
300 sec
Continuous Open
300 sec
Purge Move Time
30 sec
