Chiller is a water-cooling machine which use vapor compression or absorption refrigeration cycle. Chilled water may be used with the fan-coil system or for equipment cooling. During the cooling chiller generates excess heat that have to be abstracted in the environment.
Chiller - fancoil system is a centralized multi zone air-conditioning system. This system use a liquid which circulates between chiller and heat exchangers (local fan-coils) with a relatively low pressure. As a liquid may be used water or water-glycol mix. Besides chiller and fan-coils this system consists of pump station and automatic control.
Translation for «chiller» is missed in GOST 22270-76 «Equipment for air conditioning, ventilation and heating». For the «fan coil unit» - fan closer (the closer is worked with the built-in fan local recirculation and flow in the room is a mixture of indoor air with outdoor air which having passed pre-processing in the central air conditioner and also heating and/or cooling air)
Advantages in Advantages in comparison with split-systems.
The system chiller-fan coil units are more effective in electricity consumption than roof-mounted systems but less economy in comparison with systems with variable refrigerant flow (VRF). However maximum capacity VRF-system is limited.