17 - Timer levels 3 and 4
If automatic reconnection is used for speeds 3 or 4, you
can enter how many hours the system should run on level 3
or 4 before it automatically returns to level 2. The set
point can be configured between 1 and 9 hours.
Setting option: between 1 and 9 hours.
18 - Filter/stop
To ensure that the filters are changed when the alarm
“Change Filter” flashes on the screen of the control panel,
the set point can be configured to ON. The system will then
stop automatically after 14 days if the filters have not
been changed.
If this precaution is not required, the set point can be
configured to OFF and the system will continue to operate.
Setting option: ON/OFF.
19 - Method of regulation
There are 3 options:
0. Room regulation (T2 sensor)
1. Supply air regulation (T1 sensor)
2. Extract air regulation (T7 sensor)
If the system is used in a dwelling, supply air regulation is
the normal choice. The set point is configured to 1.
For room regulation, configure the set point to 0.
For extract air regulation, configure the set point to 2.
Setting option: between 0 and 2.
20 - Preheating
If preheating is set to ON in item 2 of the User menu, the
set point must be configured to the fresh air temperature,
at which the preheating should connect.
Setting option: between -15 and 0 °C.
21 - Bypass open
Here you set the temperature at which the bypass should
be 100 % open. You set a temperature differential which
means that if you want the bypass to be 100 % open at e.g.
23 °C and if the set temperature in User Menu item 1 is 20
°C, this menu item should be set to 3 °C.
The bypass will open, provided that:
1. The exhaust temperature is higher than the outdoor
air temperature.
2. The outdoor air temperature is above the set tempera-
ture in the Service Menu Item 29.
Units with modulating bypass:
If the temperature rises 0.5
°C above the temperature set in User Menu item 1, the
bypass damper will begin to open. The bypass is 100 %
open when the temperature reaches the set point in the
User Menu Item 1 + the temperature differential set in this
menu item.
To get a smooth opening of the bypass, the temperature at
which the bypass is fully open should be set appr. 3 ºC
above the set temperature in Use Menu item 1.
Units with on/off bypass (e.g. ECO190 / ECO 375): The
bypass opens when the temperature reaches the set point
in the User Menu Item 1 + the temperature differential set
in this menu item.
Setting option: between 1 and 10 °C.
22 - Regulation water
If a water reheater with a motor-operated valve is
installed in the system it may be necessary to adjust the
regulation time.
The less regulation time, the faster the motor-operated
valve will regulate.
Setting option: between 1 and 250 seconds.
23 - Regulation electricity
If an electrical preheater or an electrical reheater is
installed, it may be necessary to adjust the regulation
time.
Setting option: between 1 and 300 minutes.
24 - Frost reduction
To avoid icing of the counter current heat exchanger, the
supply air flow can be reduced gradually, when the exhaust
air temperature after the counter current heat exchanger
has fallen below the set temperature. This function
gradually reduces the supply air flow, until the set value
has been reached.
Caution: May cause under pressure in the house!
Setting option: between 0 and 10 °C. The function is
disabled if set to 0 °C.
25 - Frost protection
If a water reheater with motor-operated valve is instal-led
in the system, a frost protection sensor must be fitted to
the water reheater and the set point configured to ON.
If no frost protection sensor is installed, the set point
must be configured to OFF.
Setting option: ON/OFF.
26 - Frost protection temperature
If frost protection in item 25 is set to ON, the frost
protection temperature must be configured to the
temperature where the system should stop and the motor-
operated valve open completely for the flow of hot water.
Setting option: between 0 and 10 °C.
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