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© Munters AB, 2015
60
4.13.3
D
EFINING
N
ATURAL
C
ONDITIONS
Natural Conditions define when the controller switches to Natural Ventilation. Set the following
parameters:
•
From/To Day: Sets start and end day for the Natural Program
•
From/To Time: Sets starting and finishing time for the Natural Program
•
Low Outside Temperature Target Difference: The band below the Current Target Temperature in
which Natural Programming operates (outside temperature). Range: -20 to +20° C.
•
High Outside Temperature Target Difference: The band above the Current Target Temperature
in which Natural Programming operates (outside temperature). Range: -20 to +20° C.
•
Minimum Wind Speed to Enter: Sets the wind speed required to enter Natural Program.
•
Maximum Wind Speed to Exit: Sets wind speed required to exit Natural Program.
•
Minimum Wind Speed for Tunnel Temp: When the unit is in Natural Mode, if the temperature
rises above the Tunnel Temperature, Farm Premium switches to Tunnel mode unless the wind
speed is above the speed set here.
NOTE:
The above three parameters require installing and configuring a wind speed sensor.
4.13.4
D
EFINING
N
ATURAL
O
PERATION
Natural Operation defines how the controller functions in Natural Ventilation.
•
Low Temperature Difference: The band below the Current Target Temperature in which Natural
Programming operates (inside temperature).
•
High Temperature Difference: The band above the Current Target Temperature in which
Natural Programming operates (inside temperature)
•
Step size (%):Sets each levels step increment
•
Curtain delay time: To prevent excess switching between steps, set a delay time.
•
Minimum Curtain Position: Sets the minimum curtain position.
•
Maximum Curtain Position: Sets the maximum curtain position.
•
Wind and Rain Effect: Enables Farm Premium to consider additional parameters (found in the
Help) when calculating the maximal curtain opening.
4.13.5
N
ATURAL
P
ROGRAMMING
H
ELP
|
S
ET
D
EFINITIONS
•
Natural Setting
o
Enable Natural In Tunnel: Enables using Natural Ventilation definitions when in Tunnel
mode.
o
Wind Gust delay Time (sec): Set the delay time for recalculating curtain movement if the
wind speed changes.
SYSTEM PARAMETERS
NATURAL SETTING
Enable Natural In Tunnel
NO
Wind Gust delay Time (sec)
60
Disable Stir Fan above W. Speed
6
Minimum Time in Any Vent Mode
10
Use Tunnel as Natural Curtain
NO
WIND & RAIN EFFECT
Wind Low speed
4
Wind High speed
8
Wind & Rain Low speed
2
Wind & Rain High speed
6