© Munters AB, 2015
33
3.6.2
S
TATIC
P
RESSURE
H
ELP
|
S
ET
D
EFINITIONS
While viewing the Static Pressure menu: Press
HELP
, select SET, and press
ENTER
.
•
Wind Gust Delay Time (seconds): Set length of time in seconds before starting Static Pressure
control after an unexpected change in air pressure.
•
Static Pressure During Tunnel: Select YES or NO for using Static Pressure control when in
Tunnel mode.
•
Transitional Tunnel: Select YES or NO for using tunnel curtains when static pressure is high
and vents are already at 100%.
•
Minimum Ventilation Using (vent/curtain): Select VENT or CURTAIN for controlling static
pressure when in minimum ventilation.
•
Low Incoming Air (Difference to Target): Define low temperature for static pressure control.
•
High Incoming Air (Difference to Target): Define high temperature for static pressure control.
•
Emergency Static Pressure Delay (seconds): Set length of time in seconds before initiating an
emergency opening when pressure exceeds high alarm setting.
•
Curtain Position in Emergency Static Pressure (%): Set the desired curtain position (in
percentage) when an emergency pressure event occurs.
•
Low Static Pressure Alarm Minimum Level (MinV): Below this level, the controller ignores low
static pressure alarms.
•
Low Static Pressure Alarm Min. Level (Tunnel): Below this level, the controller ignores low
static pressure alarms while in tunnel mode.
•
Time to Produce Static Pressure (seconds): Enter the length of time to reach target pressure
when minimum ventilation fan cycle is on.
•
Attic Advance Opening Time (seconds): Define the amount of time for the attic inlets to open
before minimum vent cycling fans turn on.
3.6.3
M
ULTI
S
TAGE
T
UNNEL
C
URTAINS
When in static pressure mode and employing multiple tunnel curtains, Farm Premium can open the
curtains in sequence. Opening the tunnel curtains commences when the target static pressure is reached
and the controller signals to the tunnel machine to operate the curtains. Farm Premium opens the first
tunnel curtain (as defined in the relays) to the user defined level
.
If additional ventilation is required, the
second tunnel curtain opens. This process continues for each defined curtain.
As pressure falls, the process is reversed; curtains close in progression starting with the last curtain.
To set up Multi Stage Tunnel Curtains:
1. In
Installation > Relays
define more than one relay as tunnel curtain (open and close).
SYSTEM PARAMETERS
STATIC PRESSURE
Wind Gust Delay Time (sec)
S. Pressure During Tunnel
Transitional Tunnel
Minimum Ventilation Using
Low Incoming Air (diff to Trg)
High Incoming Air (diff to Trg)
Emergency S. Press. Delay (sec)
Curt. Pos. In Emerg. S. Press.%
Low S.P. Alarm Min. Level (MinV)
Low S.P. Alarm Min. Level (Tun.)
Time To Produce S. Pressure (sec)
Attic Advance Opening Time (sec)
10
YES
NO
VENT
-25.0
-10.0
60
100
0
0
10
0
