Sabiana IRC board-remote c Manual de usuario descargar pdf (Pagina 18)

CRC

CRR units with IRC electronic board

IRC electronic board

The electronic board, fitted inside the electrical panel, can manage different control modes so as to best satisfy the

requirements of the installation. These modes are selected by suitably positioning the configuration dipswitches,

which define the following main functions:

• 2 pipe / 4 pipe system

• Operation without / with remote control

• Continuous ventilation

• Close valve

and stop fan in cooling mode (autofan function)

• Close valve

and stop fan in heating mode (autofan function)

• Close valve and stop fan

in both cooling and heating mode (autofan function)

The autofan function allows the simultaneous ON/OFF control of the water

valve and the fan, while at the same time optimising the operation of the unit.

When reaching the set point, the controller closes the water valve (valve OFF)

and only 3 minutes later stops the fan, so as to correctly compensate for the valve

closing time. To prevent the air probe from measuring an incorrect temperature, when the

fan is OFF the controller runs a number of fan ON cycles to annul the effect of any stratification

of the air in the room.

In two pipe systems, a water probe (T2 accessory) can be installed on

the supply pipe to the unit upstream of the water valve. Based on

the temperature read in this section of the pipe, the device will

select either cooling or heating operation.

The electronic board also features a contact for connection to a

window switch or remote enabling signal. When the contact is

closed, the unit can operate, when the contact is open, the unit

stops. The same contact can be used for starting and stopping the

unit from an external timer or any other remote switching device.

In addition, a series of units can be switched ON or OFF at the same

time, by using a flip-flop switch connected to the terminals present on the

board.

Sensors that require a 12 Volt power supply, for

example occupancy sensors, can be connected to

other terminals on the electronic board and then to

the ON/OFF contacts. The board is able to power

external sensors with a maximum current of 60 mA.

irc

eLecTronic board

insTaLLaTion exampLe

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infra-red remoTe conTroL

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Sabiana IRC board-remote c Manual de usuario Pagina 18

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