Sensors Adjusting; Modbus Sensors; Pressure Limits To Each Mode; Communications Line Configuration - Salda MCB Technical Manual

› exhaust air RH sensor;
› supply air pressure switch;
› exhaust air pressure switch;
› an additional supply air pressure sensor is designed to measure air flow when the exhaust air fan is controlled by the supply air fan flow;
› an additional exhaust air pressure sensor is designed to measure air flow when the exhaust air fan is controlled by the supply air fan flow.
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 coefficient, 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 off, warning is displayed.
Sensors are configured 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
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 airflow (1, 2, 3, 4) by using Modbus pressure switches for filters, 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 specified 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 configured 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
18 | EN
› Extract air pressure;
› Supply air pressure;
› Extract air filter air pressure;
› Supply air filter air pressure;
› Heat exchanger air pressure;
› DX cooler/heater coil pressure.
› Supply air flow pressure sensor 2;
› Exhaust air flow pressure sensor 2.
› An additional supply air pressure sensor is designed to measure air
flow when the exhaust air fan is controlled by the supply air fan flow.
› An additional exhaust air pressure sensor is designed to measure air
flow when the exhaust air fan is controlled by the supply air fan flow.
MCB_miniMCB v2019.1