Platinum Plus
85
to simply open the tunnel curtain without
regard to pressure.
c. Transitional Tunnel (N/0/Y-1)
: select
whether to supplement side ventilation
pressure control with the tunnel inlet
curtain in the event target pressure cannot
be reached with the side vents already at
100% open. In some cases, the maximum
number of fans in cross ventilation
exceeds the capacity of the side vents to
open enough to obtain target static
pressure. If this option is yes, then the
Platinum Plus opens the tunnel curtain
enough to meet the target pressure.
d. Incoming Air Low Temperature
: this is
the temperature below which the Platinum
Plus maintains the Pressure at Low Temp
pressure setting in Control, Pressure for
side or minimum ventilation. At
temperatures between this temperature
and the Incoming Air High Temp, the
controller interpolates values. The outside
temperature, as defined in Install,
Temperature Definition is the incoming
air low temperature.
e. Incoming Air High Temperature
: this is
the temperature above which the Platinum
Plus maintains the Pressure at High Temp
pressure setting.
f. Emergency Pressure Delay (seconds)
:
length of time to wait for a high pressure
above the high alarm setting before
entering emergency pressure operation. In
this event the controller opens all known
air sources to provide air. This situation
typically occurs when there is an
equipment failure preventing the usual air
sources from functioning. An emergency
pressure event latches the controller until
the operator performs an Alarm Reset in
the Management Menu. All devices
continue to operate at their temperature
settings except for those that allow air to
enter the facility.
g. Curtain Position in Emergency
Pressure, %: for many users the default
100% open is satisfactory. However, in
cold climates with young birds, it may be
necessary to prevent total opening of
curtains in the event of a side vent failure
producing high pressure. The curtains
(tunnel and natural curtains) open this
amount in an emergency pressure event.
h. Low Pressure Alarm Minimum Level
during minimum ventilation: low pressure
alarms are ignored when the ventilation level
is below this setting. Note that the Platinum
Plus accounts for no pressure periods during
cycling fans, so it is normally not necessary
to set this parameter.
i. Low Pressure Alarm Minimum Level
during tunnel ventilation: low pressure
alarms are ignored when the ventilation level
is below this setting and the control is in
tunnel ventilation.
j. Time To Produce Pressure
: Enter the length
of time to reach target pressure when
minimum ventilation fans cycle on. The
default of 10 seconds is satisfactory in most
cases, but some buildings take longer to reach
target pressure. If the automatic inlet advance
fails to function, try increasing this parameter
to 20 seconds.
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