Variable Refrigerant Flow Systems focuses on VRF systems, which use a combination of zone‐level indoor terminals and outdoor components to provide heating and air conditioning.
Topics include:
- System component overview (outdoor units, indoor units, controls, refrigerant piping, heat recovery control units)
- Air‐ and water‐cooled heat rejection
- Ducted and non-ducted indoor units
- System configurations (cooling only, heat pump, heat recovery)
- Maintenance considerations
- Refrigerant safety
- Space humidity control
- Ventilation air delivery
- Cooling coil condensate
- Equipment rating standards
- Combination ratio
- Low ambient operation
- Defrost operation
- Lubrication and oil recovery
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