28
Parameter
Value
Function
Timing program
step
Activation of possible fan steps. This setting controls the number of setpoints for regulated fans.
Step 1
Timing program function = Step ---> Possible settings for timing program: Off, St1.
Timing program function = Step+Temp ---> Possible settings for timing program: Off, Econ1, Comf1.
Step 2
Timing program function = Step ---> Possible settings for timing program: Off, St1, St2.
Timing program function = Step+Temp ---> Possible settings for timing program: Off, Econ1,
Econ2, Comf1, Comf2.
Step 3
Timing program function = Step ---> Possible settings for timing program: Off, St1, St2, St3.
Timing program function = Step+Temp ---> Possible settings for timing program: Off, Econ1,
Econ2, Econ3, Comf1, Comf2, Comf3.
Example 1
Timing program function = Step, Timing program step = Step 2.
Fan regulation with two setpoints for St1 and St2. Temperature regulation with one setpoint for
comfort operation.
Example 2
Timing program function = Step+Temp, Timing program step = 3
Fan regulation with three setpoints for St1, St2 and St3. Temperature regulation with separate
setpoints for economy and comfort operation.
With Econ 2, the temperature setpoint for economy operation and fan setpoint St2 are used.
External control
input
No
No external input for operating mode switching, timer, button, detector for external control, etc.
One
One input (e.g. on/off).
Two
Two inputs (e.g. Auto/Off/St1/St2).
Buzzer alarm
output
No
No alarm output.
One
One output (for example for priority alarms).
Two
Two outputs (for priority and non-priority alarms).
External
setpoint
No
No analogue input for connection of external setpoint or compensation for external setpoint.
Volt
Input for 0–10 V DC signal.
Ohm
Input for 0–2500 ohm signal.
QAA27
Input for QAA27.
BSG21
Input for BSG21 setpoint compensation.
Sensor:
Temp. room
sensor
None
Inputs for room temperature sensors. Select max, min, average or individual value for regulation
for one or more sensors in Configuration 2.
1 sensor
2 sensor
1 unit
1 1 unit
2 units
Extract air temp.
sensor
No
Input for extract air sensor.
Yes
Yes+Max
If the system has been in operation for more than 5 minutes, the max temperature is saved when
it is switched off; otherwise the actual temperature is saved.
The setting is meaningful only if there is no room sensor and nighttime operation (for example
nighttime cooling) without a temperature test is to be used. This setting should not be used with
support operation. (Temperature test: the system is started briefly to update the duct sensor
temperature.)
Supply air temp.
sensor
No
Input for supply air sensor.
Yes
Outdoor temp.
sensor
No
Input for sensor for outdoor air temperature.
Yes
Yes+Max
If the system has been in operation for more than 5 minutes, the min temperature is saved when it
is switched off; otherwise the actual temperature is saved.
The setting is meaningful only if a sensor is fitted in the duct and nighttime support operation
(for example nighttime cooling) is activated, or as a safety function for pump start at low outdoor
air temperatures.
