Demand-Driven Regulation Of Ventilation Units Through Co; And Humidity Sensor; Fan Calibration; Modbus - Helios ECgreen Vent KWL EC 800 S Pro WW Notice D'installation Et D'utilisation

Installation and Operating Instructions
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NOTE
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ATTENTION
Central Ventilation Units KWL EC.. S Pro/WW
– When is the unit bypass used?
The bypass is normally used in the summer months for so-called "night cooling". With regard to night cooling. the effect
of cool outside temperatures is used in comparison to room or inside temperatures.
The bypass can also be used in transition periods (spring and autumn) if the room temperature is significantly higher
than the outside air temperature during the day due to high windows ("natural bypass cooling"). The night cooling effect
and "natural bypass cooling" is strongly influenced by the temperature differences between outside air/supply air and
room air, the flow rate, the shade and the required cooling loads. Bypass cooling will never replace air conditioning!
– Bypass functional description
If the ventilation unit is supplied with system voltage, the bypass will close completely. The bypass will open if the all of
the following conditions are met:
Condition 1: The room temperature is higher than the set target supply air temp. (factory setting: 21 °C).
Condition 2: The outside air temperature is higher than the set outside air temperature limit (factory setting: 15 °C).
The temperature of the outside air temperature limit, can be changed on the controller > Service menu:
"Bypass settings" (see also Page 20).
Condition 3: The room temperature is higher than the outside air temperature.
The bypass is closed if one of the aforementioned conditions is no longer met!

3.2.13 Demand-driven regulation of ventilation units through CO

The ventilation unit has the connection option for a sensor (CO
unit motherboard pursuant to the wiring diagram.
The CO control system monitors the CO
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centrations to prevent, for example, signs of fatigue, the lack of concentration or headaches. The CO
tivated on the service menu of the controller when delivered from the factory.
The humidity controller ensures increased ventilation at higher levels of indoor humidity (% RH) for the removal of
moisture to counteract damage to the building material. The humidity controller is deactivated when delivered from the
factory.
In order to activate the sensor controller, the CO
"Ext. sensor" (see also Page 20) of the controller after connection to the motherboard. Furthermore, the ventilation unit
must be switched to DCV mode.
The unit airflow rate is controlled automatically depending on the CO
rate is automatically increased with the increase of the respective sensor value. If the set limit value is exceeded, the
ventilation unit will work at max. flow rate capacity.

3.2.14 Fan calibration

The maximum operating point of the ventilation unit is determined during ventilator calibration. in this respect, the ven-
tilation unit runs at 100% ventilator capacity for a defined period of time. The maximum achievable flow rate and the
corresponding static pressure in the ductwork is shown as a result of the ventilator calibration.
The calibration can be activated on the controller > Service menu 2: "Fan calibration". The calibration takes around
3-5 minutes!
In the context of starting up and adjustment of the ventilation unit, the ventilator calibration must be carried
out before adjusting the ventilation unit! All control dampers should be pre-set to the desired target value, all
valves should be completely opened.

3.2.15 Modbus

The fan unit can also be controlled via the following interfaces:
• Modbus TCP
• Modbus RTU RS 485 via A1 25-26
and humidity sensors
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or humidity). The sensor is connected directly to the
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concentration in the room and ensures increased ventilation at higher con-
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sensor or humidity sensor must be activated on the service menu >
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concentration or the relative humidity. The airflow
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EN
sensor is deac-
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