27 - Help function
This function can be used for the following:
Setpoint Function
0
The relay is off.
1
The relay is on when the system is running.
This can e.g. be used to open and close the
fresh air damper and the exhaust air damper.
2
The relay is on when extra heat is required or
when the circulating pump should run when
heating with water reheating is required.
3
The relay is on when the alarm “Change filter”
is active. This can be used to activate an
external alarm.
4
The relay is on when extra cooling is required.
This function is used if a preheater is also fit-
ted to the system.
5
The control can handle an earth heat exchang-
er by a damper.
The relay will be on for one of the following
two conditions:
• The outdoor temperature, sensor T9, is
lower than the value configured in item
26 (frost protection temperature, typi-
cally set at 5 °C).
• The outdoor temperature, sensor T9, is
more than 1° above the temperature
configured in item 1 and 1 ° above the
current room temperature.
Setting option: between 0 and 5.
28 - System stop
Here you choose if it should be possible to stop the
system by pressing the key for speed (K1) in the operating
menu for 3-4 seconds. If the set point is OFF, the system
cannot be turned off.
Setting option: ON/OFF
29 - Turn off bypass
To prevent the bypass damper from opening at low fresh
air temperatures and blow cold, not heated air into the
dwelling, use this function to configure the lowest fresh air
temperature, at which the damper must be closed. The
value is an expression of the greatest difference that may
exist between the temperature configured in item 1 and
the lowest fresh air temperature.
Setting option: between 0 and 20 °C. If 0°C is selected, the
function is turned fully off.
30 - Modbus Mode
See separate description for MODBUS.
Setting option: 0-2.
0 = Modbus OFF
1 = 9600 Baud
2 = 19200 Baud
31 - Modbus Adress
See separate description for MODBUS.
Setting option: 1-247.
32 - Humidity max. temperature
Setting the end point for outside temperature-
compensation (T3), see the X-axis on the graph.
Setting option: 5-25 °C.
33 - Humidity max. value
Setting the end point for outside temperature
compensation, see the Y-axis on the graph (desired max.
humidity value).
Setting option: 35-85 %.
34 - Humidity fan speed
Setting of how much the fan speed may differ in relation
to the desired fan speed. See menu points 11, 12, 14 and
15.
Setting option: 5-30 %.
35 - Humidity regulating frequency
Setting of desired frequency for how often the fan speed
may be changed.
The function is defined as 1 % per unit of time.
Setting option: 1-60 min.
Sketch for humidity regulation
Desired RH set-point, see the graph below.
Variable fan speed on fresh air, see the graph below.
Extract air
Fresh air
Supply air
Exhaust air
Sensor
location
12
