Demand Ventilation Control; Filter; Heat Exchanger; Temperature - Swegon CASA R3 Smart Installation, Commissioning And Maintenance Instructions

You can select an air flow boost time of 30, 60 or
120 minutes or continuous boost from a Smart control
panel. When the unit is controlled from a cooker hood,
the fan's air flow boost time is 60 minutes.

1.3 Demand ventilation control

Ventilation can be controlled by demand with following
Smart functions:
• Stepless Home/Away/Boost Control = ventilation
level is controlled according to the CO
• Humidity Control = ventilation is boosted steplessly
according to the moisture load caused by people.
• Air Quality Control = ventilation is boosted steplessly
according to VOC level.
• Smart Balancing Functions = supply and extract air
flow balance is controlled to maintain room pressure
level constant. i.e. cooker hood, fireplace or central
vacuum cleaner functions.
• Smart Cooling Boost = ventilation is boosted
according to cooling need.

1.4 Filter

The ventilation unit is equipped with supply and extract
air filters according to filter class ISO ePM1 55 % (F7).
The need of filter replacement is indicated on the
control panel and on a CASA Smart cooker hood.

1.5 Heat exchanger

The ventilation unit is equipped with a efficiency con-
trolled rotary heat exchanger. Heath exchanger is
controlled either to maintain constant supply air tem-
perature or to achieve maximum energy efficiency.

1.6 Temperature

The supply air temperature is controlled with heat ex-
changer and if needed with heating or cooling element.
In Comfort mode constant supply air temperature is
maintained by rotor efficiency control and heating and
cooling control.
In Eco mode maximum heating / cooling efficiency is
maintained. Supply air temperature is controlled only in
heating or cooling period.
The temperature control setpoint can be adjusted from
user panel, weekly timer, by operating mode or by room
temperature.
Automatic summer night cooling detects the need
for cooling. Function lowers supply air temperature set-
ting and controls the rotor to achieve the best possible
cooling effect.
All rights to changes reserved.

1.7 External connections

All connections can be made without opening the
electrical box. Plug-in modules are available for external
connections. Wide variety of IO functions are available.
The ventilation unit is equipped with In-build Modbus.
Modbus cabling can be made easily with external cable
(SEC) or module (SEM). Unit can be fully controlled
with Modbus and all external IO´s can be configured to
Modbus usage.
level.
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1.8 Protective functions

The heat exchanger freeze protection
The defrosting function guarantees continuous ven-
tilation and maintains units performance even during
extreme conditions.
The fan overheating protection
The fan overheat protection stops the fan if the tempera-
ture rises too high and is reseted automatically. If protec-
tion stops the fans an alarm is generated.
Rotor quard
Rotor quard detects that the rotor is working.
Malfunction generates an alarm.
Electric air heaters
The electric heater is equipped with automatic and
manual overtemperature protection. Overheat cuts the
heating circuit and generates an alarm.
Water-based air heaters
The ventilation unit with water-based air heater/cooler
has a temperature sensor that protects the coil from
freezing. Protection generates the alarm and starts
freezing prevention. If freezing prevention is not enough
the unit is stopped and demanded shut-off dampers are
closed. Freezing prevention is reseted automatically.
Cold supply air
The ventilation unit has built-in condensation protection.
If the supply air is too cold, the ventilation unit stops and
an alarm is generated
High temperature
If supply air or units internal temperature is detected
dangerously high the unit is stopped and an alarm is
generated.
Temperature sensors
If a sensor fault is detected, the ventilation unit runs in
restricted mode. The ventilation unit's returns to normal
mode once the fault has been corrected.
R2.060219
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