Salda MCB - Sensors Adjusting; Modbus Sensors; Pressure Limits to each Mode; Communications Line Configuration

18 | EN MCB_miniMCB v2019.1
› exhaust air RH sensor;
› supply air pressure switch;
› exhaust air pressure switch;
› an additional supply air pressure sensor is designed to measure air ow when the exhaust air fan is controlled by the supply air fan ow;
› an additional exhaust air pressure sensor is designed to measure air ow when the exhaust air fan is controlled by the supply air fan ow.
If pressure switches for more than 3000 Pa are being used, it’s necessary to change pressure scale at SERVICE › SENSORS › AIR PRESSURE FACTOR
to 1.
The pressure sensor of the heat exchanger can be connected to the third 0-10 VDC input.
For each input, the sensor voltage interval (0-10 V, 1-10 V, 0-5 V, 0.6-2.7 V, 0-3.3 V) and the minimum and maximum values are indicated for each
input.
Types of temperature sensors:
› NONE – sensor is not connected;
› REMOTE – remote; sensor temperature can be indicated via Modbus;
› NTC 10K 3977 – NTC sensor is connected.
› NTC SENSOR with a non-standard beta (2750 – 5000). After changing the beta coe󰀩cient, it is necessary to save and restart.
In this system every type of sensors and possible actions in case of failure are indicated.
› Do nothing – only warning is displayed;
› Shut down the system – system is stopped, alarm is displayed;
› Emergency mode – operation is continued, but sensor-dependent functions are switched o󰀨, warning is displayed.
Sensors are congured in the service environment window SERVICE › SENSORS.
5.39.1. SENSORS ADJUSTING
In this system, the linear adjustment of the sensors is possible, i.e. the indications of each sensor can be adjusted through +/- 100.0 °C, %, Pa,
and ppm.
The adjustment of the sensors is performed in the adjuster environment, in the window ADJUSTER › SENSORS ADJUSTING.
5.39.2. MODBUS SENSORS
The list of Modbus sensors that can be connected to MCB board via MB-Gateway:
› Supply air temperature;
› Extract air temperature;
› Exhaust air temperature;
› Outdoor air temperature;
› Water temperature for water heater;
› Water temperature for water preheater;
› Water temperature for water cooler;
› Control board temperature;
› Extract air RH;
› Supply air RH;
› Extract air CO
2
;
› Supply air CO
2
;
› Extract air pressure;
› Supply air pressure;
› Extract air lter air pressure;
› Supply air lter air pressure;
› Heat exchanger air pressure;
› DX cooler/heater coil pressure.
› Supply air ow pressure sensor 2;
› Exhaust air ow pressure sensor 2.
› An additional supply air pressure sensor is designed to measure air
ow when the exhaust air fan is controlled by the supply air fan ow.
› An additional exhaust air pressure sensor is designed to measure air
ow when the exhaust air fan is controlled by the supply air fan ow.
If pressure switches for more than 3000 Pa are being used, it’s necessary to change pressure scale at SERVICE › SENSORS › AIR PRESSURE FACTOR
to 1.
5.39.3. PRESSURE LIMITS TO EACH MODE
Various activation limits can be set for each airow (1, 2, 3, 4) by using Modbus pressure switches for lters, heat exchanger or DX cooler/heater
coil. The limits can be set manually or automatically, i.e. by activating calibration function.
The overrun limits are also specied for each sensor.
5.40. COMMUNICATIONS LINE CONFIGURATION
MCB controller has two independent communications lines. One of the lines is dedicated to remote control panels, another one – to BMS network.
The latter is galvanically insulated. Communication protocol – Modbus RTU.
Based on manufacturer set parameters
› Modbus address – 1;
› Communications Line speed – 19200;
› Data package structure – E,8,1 (communications line parity: even).
Communications lines are congured in the service environment window SERVICE › COMMUNICATION.
5.41. CONFIGURATION OF MODULES
In the section SERVICE › COMMUNICATION › INTERNAL COMMUNICATION you can indicate what modules must be connected to the main board. If this