FCU Panel Connection and Configuration
The FCU controller works with three types of dedicated panels:
- iSMA-B-LP, panel with LCD display;
- iSMA-B-SP, panel without display, fully passive;
- Touch Point panel;
- FP panel.
The default application allows the user to select, which temperature sensor source is chosen to control algorithm.
The sensor is selected by the CFG DIP switches number 5 and 6.
No. | Name | Switches Configuration | Function | |
|---|---|---|---|---|
5 | CV temperature source | 5-Off | 6-Off | LCD panel |
5-Off | 6-On | Room sensor SI3 | ||
6 | 5-On | 6-Off | Air return temp SI1 | |
5-On | 6-On | Slave | ||
iSMA-B-LP Configuration
The room panel is connected to the FCU controller’s RJ12 socket. This connection provides panel power supply and communication.
If the room panel is connected, the user can decide, which temperature sensor to control the algorithm, from the panel or from special input. The temperature source is chosen by the CFG DIP switches number 5 and 6, according to the table above. Using the iSMA-B-LP, the user can set and display many FCU controller parameters, such as fan speed, setpoint, offset, occupancy status, etc. If using the iSMA-B-LP device, the configuration and user parameters are synchronized with the BMS, the last change from the BMS or panel is the most current.
iSMA-B-SP Configuration
Using the simple panel, the user can only adjust setpoint offset and force occupation mode. The setpoint offset is automatically overridden by the value from the simple panel. For proper operation of the panel, the temperature sensor source must be taken from the SI3 input. The sensor is chosen by the CFG DIP switches number 5 and 6, in accordance with the table above. If using the simple panel, the FCU controller works as an external sensor connected directly to the SI3 input (switches number 5 off and 6 on). The temperature effective setpoint is set by changing the Setpoint_Offset value. The Setpoint_Offset cannot be overridden by the BMS; from the BMS, the Effective setpoint can by changed only by the Setpoint value. The effective setpoint pattern is shown below:
Effective_Setpoint = Setpoint + Setpoint_Offset
Touch Point Configuration
The Touch Point panel is connected to the FCU controller’s RJ12 socket. This connection provides panel power supply and communication.
If the room panel is connected, the user can decide, which temperature sensor to control the algorithm, from the panel or from special input. The temperature source is chosen by the CFG DIP switches number 5 and 6, according to the table above. Using the Touch Point panel, the user can set and display many FCU controller parameters, such as fan speed, setpoint, offset, occupancy status, etc. If using the Touch Point device, the configuration and user parameters are synchronized with the BMS, the last change from the BMS or panel is the most current.
FP Configuration
The FP panel is connected to the FCU controller’s RJ12 socket. This connection provides panel power supply and communication.
If the room panel is connected, the user can decide, which temperature sensor to control the algorithm, from the panel or from special input. The temperature source is chosen by the CFG DIP switches number 5 and 6, according to the table above. Using the FP panel, the user can set and display many FCU controller parameters, such as fan speed, setpoint, offset, occupancy status, etc. If using the FP device, the configuration and user parameters are synchronized with the BMS, the last change from the BMS or panel is the most current.