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AIR BOOSTER 2
EN/10.2018/IT30I © STULZ SpA – all rights reserved
5. I/O Controller
Air Booster 2 of type BAF60FD220 are equipped with the controller described in the following.
In the factory setting, Air Booster 2 operates on temperature control. Once the system is in
"System ON" mode, the unit controls fan speed automatically, in dependence of the measured
temperature values. If the measured value exceeds the set point, the fan speed increase, if the
temperature difference between set point and measured value decreases, the fan speed is reduced
proportionally up to the minimum speed. For units with controller on board, the microprocessor-
based electronic board is equipped with a set of terminals which are necessary to connect the
board to the controlled devices (e.g. the fan). Software with working logic and parameter settings
are safely stored in the EEPROM so that they remain permanently in case of power failure. The
controller is housed inside the electrical box. A keypad is connected to display information about
working conditions, status of the unit and alarms, if any. The controller has an RS485 interface for
communication with a building management system. The used protocol is ModBus RTU.
Technical data of the controller:
• Power Supply: 230 Vac ±10% - 50/60 Hz
• Power consumption: 10 VA max
• Communication protocol: Modbus – RTU
• Data storage on non-volatile memory (EEPROM)
• Operating temperature: -20 ÷ 60°C
• Storage temperature: -40 ÷ 90°C
• Relative humidity < 90%
5.1. User interface
Technical data of the user interface:
• Dimensions 75x36 mm; depth 23 mm;
• Protection rating IP20;
• Front protection rating IP65;
• Display: 3 keys, blue LED and height 14,2 mm.
SET
View / Edit the set point.
It selects a parameter or
confirms a value.
ON/OFF
Turns the unit on and off
Function key UP
• To scroll through the parameters or
increase their value.
• Quick menu access
Function key DOWN
• To scroll through the parameters or
decrease their value.
Display
