9
Press “Down” to go to “Set the pressure set point” and
set the pressure setpoint:
• Setpoint 1 — The normal operation pressure setpoint.
• Setpoint 2 — The pressure setpoint during a secon-
dary operation mode. The factory setting is 50 % of
the measuring range. Setpoint 2 is active when there
is a connection between input 1 and 2.
The active setpoint is shown in “Info” with a moon symbol
when setpoint 2 is active.
Table 1 K-factor
Model
K-factor
TFC 225
57
TFC 280
79
TFC 355
134
TFC 450
212
TFC 500
289
TFC 560
554
To set up the controller for CAV with outdoor
compensation
1
Press “Down” to go to “Base set-up”.
2
Press “P” to enter the menu.
3
Press “Down” to go to “Mode” and press “P” to choose
5.02 CAV control.
4
Press “Down” to go to “Metrics units” and press “P” to
choose “1: metric unit” (The factory setting, measures in
Pa, m3/h, K-factor).
5
Press “Down” to go to “Measuring range” and press “P”
to select the desired measuring range:
• 1 = 0-1000 Pa
• 2 = 0-500 Pa
• 3 = 0-300 Pa
• 4 = 0-200 Pa
6
Press “Down” to go to “K-Factor” and set the K-factor de-
pending on your product size. Refer to the table
7
Press “Up” and “Down” at the same time to leave the
“Base set-up” menu.
8
Press “Down” to go to “Settings”.
9
Press “Down” to go to “Set the pressure set point” and
set the pressure setpoint:
• Setpoint 1 — The normal operation pressure setpoint.
• Setpoint 2 — The pressure setpoint during a secon-
dary operation mode.
10
Press “Down” to go to “T-Band SA” and set the tempera-
ture range in which the setpoint changes with the out-
door temperature (The factory setting is: 30.0 K).
11
Press “Down” to go to “T-start SA” and set the tempera-
ture for when reduction starts (The factory setting is: 15 °
C)
12
Press “Down” to go to “Min. setpoint” to set the minimum
pressure for a very low outdoor temperature (The factory
setting is: 500 Pa).
4.2.6
To use MODBUS
communication
To set up MODBUS communication, refer to the MODBUS
communication tag list available at www.systemair.com.
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