​Monitoring of Multi-Blade Fan Coil Systems

Monitoring of Multi-Blade Fan Coil SystemsControl of multi-blade fan coil units typically encompasses two components: multi-blade fan speed regulation and indoor temperature regulation. I. Key Monitoring Functions for Multi-Blade Fan Coil Systems 1. Indoor temperature measurement; 2. On/off control of hot/cold water valves; 3. Variable speed and start/stop control of multi-blade fans. II. Functional Description of Multi-Blade Fan Coil System Monitoring 1. Variable speed and start/stop control of the multi-blade fan. To regulate airflow, nearly all multi-blade fan coil units employ high, medium, and low speed settings to control fan rotation. Start/stop control and airflow adjustment are typically manually operated by the user. 2. Room temperature control constitutes a complete negative feedback temperature control system. It comprises a room temperature controller that adjusts hot/cold water flow to alter the coil's cooling or heating capacity, thereby regulating indoor temperature. Most multi-wing fan coil units operate year-round. Therefore, their thermostats feature winter/summer switching mechanisms. Winter/summer switching can be manual or automatic, determined by system configuration and operational requirements. (1) Manual Thermostat Switch. Each thermostat features a manual switch for winter and summer modes, enabling cooling operation in summer and heating in winter. When using a positional thermostat, winter/summer settings connect to this manual switch. In summer, set the switch to "S". If room temperature rises excessively, the temperature sensor moves forward, opening contacts 1 and 2 on the thermostat. energizing the electric water valve to open. As room temperature decreases, the sensing element moves backward, disconnecting terminals 1 and 2. After power is cut, the spring-loaded mechanism resets and closes the electric water valve. In winter, manually switch the selector to the "W" position. The operation sequence mirrors the summer mode but in reverse: the water valve closes when room temperature is too high and opens when room temperature is too low. (2) Centralized Manual Conversion for Uniform Zones. For multi-wing fan coil units with identical orientations or functionalities, where management standards are high, centralized conversion switches can be installed to consolidate winter and summer operating modes. This eliminates the need for local conversion switches on individual thermostats. Note: This method requires all multi-wing fan coils undergoing unified conversion to share the same power source, necessitating close coordination with electrical work.