Hyundai HDFN-80-1400, Operation Instructions Manual, Page: 17 / 69

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3. Capacity Control and Safety Devices
3.1 Chilled Water Temperature Control
The signal sent from the temperature sensor installed at the water head of the chilled water outlet
controls the fuel consumption of the high pressure generator to ensure an efficient operation even
to part load.
Chilled water outlet temperature Temperature Controller Fuel control valve
(Compare to the set point) Valve action(Fuel control)
Rise-up Open
Chilled water Balanced Stop
outlet temperature Go-down Close
3.2 Hot Water Temperature Control
The signal sent from the temperature sensor installed at the water head of the hot water outlet
controls the fuel consumption of the high pressure generator.
(Compare to the set point) Valve action(Fuel control)
Rise-up Open
Hot water Balanced Stop
outlet temperature Go-down Close
TE-1
TE-1
Fuel control valve
Fig.3.1 Chilled/Hot Water Temperature Control System Chart
Chilled water temperature controller
DM