Page 74 - Fan Coil Unit

FAN COIL UNIT / AIR CONDITIONING

Fan Coil Unit Accessories

Combination Valve and FCU Automatic Control System

VALVE & FCU CONTROL SYSTEM OVERVIEW

▶ Purpose of Use
• Adjust the amount of cooling (heating) water supplied to the FCU during cooling (heating) for increased energy efficiency and cost savings.
• Attach a combination valve to the FCU piping and install temperature sensors to adjust the amount of cooling (heating) water based on the temperature
• Centrally manage the FCU and combination valves using a PC for integrated control
▶ Control Specifications
1. Operating Modes (When a Variable Valve is Applied)
(1) The valve controller can switch between cooling, heating, and ventilation modes.
(2) In cooling mode, the opening rate of the valve is variable based on the cooling design flow rate.
(3) In heating mode, the opening rate of the valve is variable based on the heating design flow rate.
2. Air Volume Control
(1) The air volume can be adjusted to weak, medium, or strong wind, and the opening rate of the valve is variable.
(2) In automatic mode, the air volume is automatically changed to weak, medium, or strong depending on the temperature, and the valve opening rate
is also automatically adjusted
3. Status Display (Central Control Option)
(1) The temperature can be displayed.
(2) Displays the target opening rate of the valve based on the design flow rate under cooling, heating, weak wind, medium wind, and strong wind conditions
(3) Displays the actual valve opening rate received as feedback from the valve
4. Fault Detection Function (Central Control Option)
(1) If the output opening rate of the valve and the opening rate of the feedback valve are more than the set error range, a fault is detected and is
displayed in the automatic control software to ensure user awareness.

VALVE & FCU CONTROL SYSTEM CHARACTERISTICS

▶ System Characteristics
• System configuration for integrated management of the FCU and VALVE.
• The VALVE & FCU central control system monitors and controls the operation/stop and opening percentage (0~100%) of the VALVE.
• The VALVE & FCU central control system monitors and controls the status of the FCU (operation/stop, airflow volume, operation mode).
▶ Combination Valve & FCU Controller (option)
• Combination Valve Control Function: AC 24 V power supply/DC 0~10 V variable output for valve volume control, DC 0~10 V FEEDBACK for valve volume
status
• FCU Control Function: Operation/stop, airflow volume control (weak, medium, strong)
• Communication Function: ID granting function (No. 1~32), transmission and reception of valve status and control information
• Temperature Sensor: FCU airflow volume control applied based on the temperature, valve volume control, and freeze prevention function
▶ GATEWAY (option)
• Communication Relay: Relays communication of the 32 VALVE & FCU CONTROLLER and VALVE & FCU central control program
▶ Combination Valve Central Control System (option)
• VALVE Status: Individual/group-controlled operation/stop, valve opening output rate, valve opening FEEDBACK amount
• VALVE Control: Individual/group-controlled operation/stop, valve opening rate setting for cooling/heating
• FCU Status: Individual/group-controlled operation/stop, airflow volume (weak, medium, strong)
• FCU Control: Individual/group-controlled operation/stop, airflow volume (weak, medium, strong), mode control (cooling, heating, ventilation)
• Temperature Control: Specifying the set temperature – Control of the VALVE and FCU according to the temperature.

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