17
UAB KOMFOVENT we reserve the right to make changes without prior notice
DOMEKT_C8_guide_21-07
• Minimum intensity
– select ventilation intensity at which the unit will operate when air quality (impurity or humidity) is
good. If 0% is selected, the unit will stop when air impurity level is low.
• Maximum intensity
– select ventilation intensity limit, under which the unit will operate when air quality (impurity or
humidity) exceeds a defined value.
• Check period
– specify how often the unit shall turn on to check air quality, when minimum intensity is set to 0%.
Fire damper
1
– parameters for the fire damper system tests
can be set. It is possible to select either automatic or manual fire
damper test. For automatic test, it is needed to set testing interval,
as well as time of the day, when the tests will be performed. Dur-
ing fire damper test, AHU will be stopped for several minutes, fire
dampers opened and closed. External fire damper controller will
check are al the dampers functioning normally and will give the
signal for AHU to restart or will indicate alarm message if some-
thing is wrong in the fire damper system.
Control sequence
– here you can activate additionally con-
nected duct-mounted heating or cooling devices (see “Installation
Manual”) that will operate only when a heat exchanger or electri-
cal heater alone cannot reach a desired temperature.
Numbers indicate the order of activation. All units have an inte-
grated electrical heater, therefore it is factory-assigned as Stage 1.
You can also assign an “external coil” (duct-mounted water heater/
cooler) or an “external DX unit” (direct evaporation heat exchang-
er) as a stage. If an external coil is selected, you also must specify
its type: “Hot water” (used for heating), “Cold water” (used for cool-
ing). If additional heating/cooling devices are not available, you do
not want to use them or an electrical heater, select “None”.
If you turn off an electric heater and do not activate a duct-mounted heater, the desired air
temperature may not be reached when the outside air is cold.
• Frost protection
– this setting is only available in units with counter-flow plate heat exchangers. This function is intended
to protect CF heat exchanger against freezing at low outdoor air temperatures and has the following settings:
Standard
– the air-handling unit is stopped when outside air temperature drops below -4°C for longer than 1 hour.
Special
– heat exchanger is protected against freezing by changing the intensity of airflows, i. e. by supplying less cold
outdoor air and extracting more warm indoor air, thus preventing frost formation. This function is sufficient to ensure frost
protection for temperatures up to -10°C.
1
Available only if optional fire damper controller is configured and connected. Refer to Fire damper controller manual for more information.
Fire dampers
Test period
7
Test time
12:00
Manual test
Start
Last test
2020-08-18 12:00
Automatic test
1
/ 2
Fire dampers
Next test
2020-08-18 12:00
2
/ 2
Stage 1
None
Electric heater
External coil
External DX unit
Control sequence
1
/ 2
Stage 1
Electric heater
Stage 2
Auto
Stage 3
None
External coil type
Cold water
Icing protection
On
External coil type
Hot water
Cold water
Control sequence
1
/ 2
Stage 1
Electric heater
Stage 2
External coil
External coil type
Cold water
Icing protection
On
Indoor humidity
Auto
2
/ 2
Control sequence
Allow dehumidifying with cooling
Off
