Part No. 4801-5331 Rev 2-2015
Evolution 1200
32 of 65
**TUNNEL SETUP**((1)Target = 75°)
(2)Tunnel Enabled = ON
Tunnel
(3)Sensors
Temperature
On
(4)---54321
(5)85.0°
Off
(6)-----3-1
(7)80.0°
(8)Use Tunnel Target Pressure = No
(9)Natural Unit #2 is Tunnel Inlet = No
(10)Enable Low Pressure Alarm in Tunnel = Yes
(11)Increase High Temp Limit +2.0 in Tunnel
(12)Tunnel Timeout = 30:00 (13)(30:00 max)
7.7
Tunnel Ventilation
The Tunnel Setup screen sets the parameters necessary to operate in the Tunnel mode.
(1) Target –
Displays the target temperature of the building.
(2) Tunnel Enabled –
Select either
Yes or No to enable or
disable going into the Tunnel
mode.
(3) Sensors –
The user is given the
choice as to what sensors
will be used to enter and exit
Tunnel Mode; select any or
all of the available sensors.
To use the outside sensor
when entering tunnel set the
sensors to display the word
“outside” by turning all the
sensors off.
(4) Tunnel „On Sensors‟ –
Selectable for 1-8 sensors. Select the sensors used for entering Tunnel Mode.
(5) Tunnel „On Temperature‟ –
The temperature at which the controller will go into tunnel mode.
(6) Tunnel „Off Sensors‟ –
Selectable for 1-8 sensors. Select the sensors used for exiting Tunnel Mode.
(7) Tunnel „Off Temperature‟ -
The temperature at which the controller will go out of tunnel mode.
(8) Use Tunnel Target Pressure –
Yes or No. This will allow a different Target Pressure to be used in the
Tunnel mode.
(9) Natural Unit #2 is Tunnel Inlet –
Yes or No. This indicates that PowerTrak Number 2 of the Natural
Set is a Tunnel inlet and will open during Tunnel.
(10) Enable Low Pressure Alarm in Tunnel
– Yes or No. Set to Yes if it is desired to use a low pressure
alarm while in the tunnel mode.
(11) Increase High Temperature Limit +##° in Tunnel –
While in the tunnel mode the Evolution 1200
can adjust the High Temperature Limit. Enter the number of degrees that the limit is to be
increased while in the tunnel mode. This increase will only be used while in tunnel.
(12) Tunnel Timeout –
This feature prevents the controller from flip-flopping in and out of tunnel and also
provides a means for the controller to retry tunnel ventilation after a tunnel error. The Tunnel
Timeout counter forces the controller to wait the selected number of Tunnel Timeout Maximum
minutes between tunnel initiation. For example, if the controller is in tunnel and an error occurs,
the controller will reload the tunnel timeout, exit tunnel ventilation, and sound the alarm. After the
tunnel timeout expires, the controller will reset the tunnel error, turn off the alarm, and if the
conditions allow, retry tunnel ventilation. The tunnel timeout will be reset during a power-on reset
or if the Tunnel Enable is toggled from off to on. As long as the Tunnel Timeout displayed value
is equal to the Tunnel Timeout Maximum displayed value, tunnel ventilation is allowed. If it is in
process of counting, then it is not allowing tunnel ventilation at this time due to a previous error or
because it has recently made an attempt.
(13) Tunnel Timeout Max –
Selectable from 10 to 30 minutes in increments of 5 minutes. This setting is
the number of minutes that the Tunnel Timeout counter will count before allowing reentry into
tunnel ventilation.
