LT-S-(L) Technical manual
Contents
1. Overview .......................................................................................................................... 3
2. Product Specification ...................................................................................................... 4
2.1 Nomenclature ........................................................................................................... 4
2.2 Product Line ............................................................................................................ 4
2.3 Compressor specification table .............................................................................. 4
2.4 Operating range graph ........................................................................................... 6
3. Construction & Functions .............................................................................................. 8
3.1 Design Features ....................................................................................................... 8
3.2 Capacity modulation system .................................................................................. 8
3.2.1 Step type capacity modulation system ......................................................... 10
3.2.2 Stepless type capacity modulation system ................................................... 14
3.2.3 The Location of the Solenoid Valves ............................................................ 19
4. Lubricant ....................................................................................................................... 21
4.1 Lubricant Specification ........................................................................................ 21
4.2 The Replacement of Lubricant ............................................................................ 22
4.3.1 Oil Change Schedule ..................................................................................... 22
4.3.2 Pre-cautions for changing oil ........................................................................ 22
5. System Application ........................................................................................................ 24
5.1 Piping Design ......................................................................................................... 24
5.1.1 Suction and Discharge Piping Layout ......................................................... 24
5.1.2 Economizer Piping Layout ........................................................................... 26
5.1.3 Minimum pressure valve .............................................................................. 26
5.1.4 Liquid Line Filter Dryer ............................................................................... 27
5.1.5 Sight Glass with Moisture Indicator ............................................................ 27
5.2 Oil Line................................................................................................................... 28
5.2.1 Oil Supply ...................................................................................................... 28
5.2.2 Lubrication and Capacity Control Modulation .......................................... 28
5.2.3 Compressor chamber injection system ........................................................ 28
5.2.4 Protection in Oil Circuit ............................................................................... 29
1）Oil temperature ....................................................................................................... 29
2）Oil filter .................................................................................................................... 30
3）Oil pressure differential .......................................................................................... 31
4）Oil level protection .................................................................................................. 31
5.2.5 Oil cooling system .......................................................................................... 31
1）Air cooling type ....................................................................................................... 33
2） Water cooling type ......................................................................................... 33
3） Refrigerant oil cooling .................................................................................. 34
5.3 Motor Liquid Injection Cooling ........................................................................... 34
5.4 Economizer System ............................................................................................... 35
5.4.1 Economizer System with Sub Cooler ........................................................... 35
5.4.2 Economizer System with Flash Type Subcooler ......................................... 36
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