blaubergventilatoren.de
CiViC eC d(1)B(e; e2)
8
Warm extract air from the room flows into the unit and is cleaned in the extract filter. Then the air is moved through the heat exchanger
and is exhausted outside with the extract fan. Cold fresh air from outside flows through the air duct into the unit, where it is cleaned by
the supply filter. Then the air flows through the heat exchanger and is moved to the room by the supply fan.
Supply air is heated in the heat exchanger due to transfer of the heat energy of warm and humid extract air to the cold fresh air. The air
streams remain separated in the heat exchanger. Heat recovery minimizes heat losses, which reduces costs for space heating in the cold
season.
If the outside temperature drops down below -3 °C, the heat exchanger may freeze.
(A freezing danger appears if the exhaust air temperature downstream of the heat exchanger is below +5 °C and the intake air temperature
upstream of the heat exchanger is below -3 °C for units with air preheating and when the exhaust air temperature downstream of the
heat exchanger is below +3 °C for units without preheating.
After increase of the exhaust air temperature the unit reverts to the previous operation mode).
Frost protection of the heat exchanger:
• By reducing the speed (stopping) of the supply fan.
• Via a bypass duct with a bypass damper.
• By automatically switching on the electric supply air preheater.
When using a bypass duct, part of the cold air, bypassing the heat exchanger, enters the room, while the degree of heat recovery
decreases.
When the speed of the supply fan decreases, the air exchange in the room is unbalanced, up to a lack of air exchange.
The use of an integrated preheater ensures a constant temperature and volume of the supply air at low ambient temperatures.
In this case, heat recovery is maintained, and the energy expended during the operation of the preheater reduces the load on the space
heating system.
Heaters
Depending on the model the unit includes a preheater and a reheater of supply air (CIVIC EC D(1)BE2) or only a preheater (CIVIC EC D(1)
BE).
The preheater prevents freezing of the heat exchanger and is located in the intake air duct upstream of the heat exchanger.
The reheater is located in the supply air duct downstream of the heat exchanger.
Condensate drainage arrangement
The difference between the supply and extract air flow temperature leads to condensate generation. Condensate is collected in the drain
pan and is removed outside through the drain pipe.
The control unit inside of the unit enables power supply and connection of the external devices.
Unit control
The unit is controlled by the automatic control system (ACS), consisting of the controller and the control panel.
Additional equipment
The air handling unit has a possibility to connect the air quality control sensors:
Additional equipment for the unit is available on a separate order, installed and connected by the manufacturer at the customer's request.
Air quality control sensors:
• RH humidity sensor;
• CO2 sensor;
• VOC sensor.
If the humidity level, CO2 or VOC concentration exceed the set point (set in the user menu), the supply and extract fans automatically
switch to higher speed to extract excessive humidity, CO2 or VOC from the room.
If the humidity level, CO2 or VOC concentration falls down below the set point, the unit reverts to the previous operation mode.
Содержание CIVIC EC D1B 300
Страница 24: ...blaubergventilatoren de B177EN 05 ...
