Cumberland PRO-VISION, Руководство пользователя

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PRO-VISION rev.04
PRO-VISION
6.4. Natural Ventilation
The controller can control the opening of
2 natural ventilation curtains. In the natural
ventilation mode, all the fans are off and the
air intake is provided by the natural curtains
and by the tunnel inlet (if applicable). This
ventilation mode is only accessible in turkey
facilities. Refer to section 4.4 to select the
type of facility in use.
The natural ventilation is only accessible
in a turkey facility (see section 4.4).
Note that the static pressure alarm
conditions are not monitored while the
controller is in natural ventilation.
Beginning of Natural Ventilation: The con-
troller enters in natural ventilation when
temperature reaches the start temperature of
a natural ventilation curtain. At that moment,
the controller makes the natural curtain open
to its initial position and closes the lateral &
attic vents.
Stopping the Fans in Natural Ventilation: The
controller switches off all the fan outputs
(lateral & tunnel fans) when the temperature
reaches the fans shutoff point
(“Shutoff fans
at”) .
Movement of the curtains in natural ventila-
tion: A natural ventilation curtain opens to its
initial position when temperature reaches its
respective start temperature. The curtain then
opens gradually towards its maximum opening
as temperature increases; it finally reaches its
maximum opening when temperature reaches
the “Max Open T°” temperature value.
Operating Diagram of
Natural Ventilation
Curtain
T° of the
curtain’s
probes
100%
First
Opening
Natural 1 Start T°
0.3°F
Max
Open T°
Natural
Curtain 1
Opening
When a curtain reaches a particular position
and stops, a temperature variation of at least
0.5°F must occur for the curtain’s position to
be readjusted. An
“Off Time”
is also defined
to leave a sufficient amount of time between
2 movements of the curtain.
Note that if the tunnel inlet is enabled,
this inlet will follow the same movements
as natural curtain 1.
End of Natural Ventilation: The natural venti-
lation mode ends when the controller enters
in tunnel ventilation or when it goes back in
lateral ventilation (if applicable). Note these
2 ventilation modes are optional in a turkey
facility that is why it is also possible to use
the natural ventilation mode permanently.
Transition from Natural to Tunnel: At the
start-up of tunnel ventilation, the natural
ventilation curtains close completely and the
tunnel inlet opens in the meanwhile. When the
natural ventilation curtains are totally closed,
the tunnel inlet reaches its required position
and the controller activates the proper fans
and tunnel fans.
Transition from Tunnel to Natural: Tunnel
ventilation ends when the temperature gets
lower than the start temperature of the first
tunnel fan stage. At that moment the natural
ventilation curtain opens completely and the
tunnel inlet opens in the meanwhile. When
half the opening time of the natural curtain
has elapsed, the controller switches off all the
tunnel fans and the tunnel inlet starts moving
along with natural curtain 1.
Select: 1.
Main menu
* On / Off Settings
* A password may be required to access this menu
(see section 4.2.1).
Use the arrow keys to scroll down and select 2.
the desired natural curtain output.
* These out-
puts are available if they have previously been enabled
in the Set-up menu (see section 4.4).
Set the following parameters: 3.
On temperature — Set the temperature at
which the selected natural ventilation curtain
starts opening. *
If 2 curtains are used, the first
curtain to start moving signals the beginning of
natural ventilation.
Select the 4.
“Nat.x Setting”
tab with the menu
selectors to display the curtain settings and
set the following parameters:
Natural 1 Settings
Maximum open T°
Shutoff fans at
Total open time
Total opening in inches
First opening in inches
Off Time 81.0°F
79.0°F
7:00 M:S
60”
4”
2:00 M:S
To modify use
Maximum open T° — Select the temperature
at which the selected curtain reaches its
maximum opening.
Shutoff fans at — Select the temperature at
which the fans must stop running in natural
ventilation. *
This parameters is common to both
natural ventilation curtains and is only available
if fan outputs are enabled in the Set-up menu (see
section 4.4).
Total open time — Select the total opening
time of the curtain (in minutes and sec-
onds).
Total opening in inches — Select the total
distance that separates the minimum and
the maximum positions of the curtain (in
inches).
First opening in inches — Select the initial
opening of the curtain (in inches). The cur-
tain reaches this opening when temperature
reaches its “On Temperature”.
Off Time — Select the amount of time that
must be left between 2 consecutive move-
ments of the curtain.
On/Off Settings
...
Natural 1
Natural 2
...
On Off Mode Fan shutoff
Items
To modify use -
Set Point : 75.0
79.0
79.0
...
Nat.1
Setting