The Advantage Of Large Temperature Difference Control System
1. System summary
 A large temperature difference control system is consisted of the control valve
built-in water temperature sensor - it observes the water temperature that passes
FCU with the sensor built into the valve and to satisfy temperatures fluctuate
set beforehand, it controls flowing quantity - ,  room temperature controller by
fan speed, andpower box.
It controls both flow and fan speed and pursues comfortable and energy-saving.
Central Control Unit
Fig-1 System out-line Construction
Large Temperature Difference
Central Control Unit Control Valve
CCU
　 　 Return
　 　 　 　 　 　 　
DB Power Box DB Going Power Box
　 　 　 　 ＦＣＵ
　 　 　 　 　 　
CS HAV CS HAV
Controller ↓ System movement Controller
Large Temperature Difference
Control Valve H H Air Flow
　 　 M 　 　 M 　 　
　 　 L The rate which
　 　 　 　 is opening the
　 　 valve
Set Temperature
* The valve is controlled by floating
Central Control Unit 　  PC2000 　 　 Group management of the controller. 　 　 　
(CCU) 　 　 　 　 　
Controller 　 　 　 　  KC800-DRKPC Room temperature set up 　 　 　 　 　 　
　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　 　
Large Temperature 　  HAV-4831 　 Flow control of FCU. The water temperature  　 　 　
 Difference Control 　 　 　 which goes and returns is secured to a large 　
               Valve 　 　 　 　 　 　 　 difference of temperature. 　 　 　 　 　 　 　
Fig-2 FCU Control :  Fig-3 FCU Control : 
(Single operation type) (Three fan coils units interlocked type)