Daikin ATB03RA, Технические данные инструкция

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Databook Modular T - October 2022 - Rev. 00 32
5.3.4. Dampers
Two type of dampers are available as option for Modular T: mixing damper to allow recirculation and external
dampers for AHU isolation.
5.3.4.1. Mixing Damper
A mixing Damper is available as accessory to allow recirculation of the air, saving energy and consequently
decrease running cost of the unit. It also enables total space air conditioning. In the table below, the material
names of the mixing damper for each size are shown:
Size
03 04 05 06 07
Material Name
ATA03MDA ATA04MDA ATA05MDA ATA06MDA ATA07MDA
In order to achieve the 100% of recirculated air, if required, two external dampers (on fresh and exhaust
connections) must be installed. Astra web does not automatically add them, so these have to be manually
selected whenever needed. The mixing damper requires the modulating actuator (ATE00AMDA).
5.3.4.2. External Dampers
External dampers can be installed on all the four air flow connections.
It is advised to install the external dampers on supply and return duct connection when a mixing damper is
selected. The external dampers require the modulating actuator (ATE00AMDA). In the table below the
material names for external dampers are summarized. Each material name accounts for two dampers.
Size
03 04 05 06 07
Material Name
ATA03EDA ATA04EDA ATA05EDA ATA06EDA ATA07EDA
5.3.5. Electrical accessories
5.3.5.1. Frost Switch
The frost switch (ATE00FSUA) protects the water coil from freezing. It is placed after the coil and when air
temperature is below 5°C, the unit stops to operate. The frost switch auto resets if conditions allow a safe
functioning of the AHU again.
5.3.5.2. Modulating actuator for valves
The modulating actuator (ATE00AMVA) is automatically added in Astra when a valve is selected.
Control Type DC 2-10 V
Torque 5 Nm
Voltage AC/DC AC/DC 24V
Degree of protection IP54