Piping Diagram
Samsung Electronics 231
Safety Start
▪ Purpose
- Protect the system and compressors by preventing poor lubrication due to liquid compression or oil foaming.
- Enable high-speed cooling and heating through fast start-up if there is no risk of liquid compression.
▪ Concept
- A start-up pattern is decided taking into account the compressor temperature, indoor and outdoor temperatures,
and operation ratio during start-up.
- Cold Start :
- Warm Start :
If the compressor temperature is high, a standard start-up frequency is used as there is no risk of liquid
compression
.
- Quick Start :
If the operation ratio is high, compressors start at the same time to quickly improve the performance.
- Normal Start :
- Cold Operation :
- DSH = Compressor discharge temp.
- High pressure saturation temp.
- Definition of compressor discharge temperature from DSH :
Min { Max(Tdis_comp1, Ttop_comp1), Max(Tdis_comp2, Ttop_comp2) }
Starting
Normal Operation
Quick Start Normal Start
Cold Operation
Cold Start
Warm Start?
No
Yes
Yes
Yes
No
■ Prevention of liquid compression
■ Compressor protective start-up
■ Cold Operation included
■ Stable start-up■ High-speed start-up
Quick Start?
DSH > 10 K
7-3 Functions (cont.)
7-3-2-2 Start-up modes
7-3-2 Control (cont.)
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