5 © STULZ SpA . – all rights reserved EN/39B/06.2018
SAL
Table of contents
1. Introduction ........................................................................................................... 7
1.1. Symbols used in this manual .................................................................................................................... 7
1.2. Attachments ................................................................................................................................................... 7
2. Safety directions ...................................................................................................8
2.1. Introduction .................................................................................................................................................... 8
2.2. General rules .................................................................................................................................................. 8
2.3. Residual hazard ............................................................................................................................................. 9
2.4. Safety data ...................................................................................................................................................10
2.5. Labels .............................................................................................................................................................11
2.6. Intended and non-intended use ............................................................................................................15
3. Handling and storage ..........................................................................................15
3.1. Unit receipt ...................................................................................................................................................15
3.1.1.Precautions when handling the unit ............................................................................................17
3.2. Storage ..........................................................................................................................................................18
4. Description .........................................................................................................19
4.1. Coding ............................................................................................................................................................19
4.2. Component lay-out and operating methods .....................................................................................22
4.3. Refrigerant circuit ......................................................................................................................................26
4.4. Cooling components .................................................................................................................................26
4.5. Safety components of refrigerant circuit ...........................................................................................27
4.6. Protection components of refrigerant circuit ...................................................................................27
4.7. Mechanical components ..........................................................................................................................28
4.8. Motors ............................................................................................................................................................29
4.9. Electrical components of protection and control ............................................................................29
5. Technical data .....................................................................................................32
5.1. Application limits .........................................................................................................................................32
5.2. Technical data .............................................................................................................................................32
5.3. Drawings ........................................................................................................................................................35
6. Installation ...........................................................................................................40
6.1. Positioning the unit ....................................................................................................................................40
6.2. Refrigerant connections ..........................................................................................................................44
6.3. Hydraulic connections ..............................................................................................................................50
6.4. Electrical Connections ..............................................................................................................................50
7. Start-up ...............................................................................................................55
7.1. Commissioning ............................................................................................................................................55
7.2. Checks after commissioning .................................................................................................................55
7.3. Switching off ................................................................................................................................................55
8. Maintenance ........................................................................................................56
8.1. Safety instructions .....................................................................................................................................56
8.2. Preventive maintenance schedule .......................................................................................................56
8.2.1.Air circuit ...............................................................................................................................................57
8.2.2.Refrigerant circuit .............................................................................................................................58
8.2.3.General cleaning ................................................................................................................................59
8.3. Extraordinary maintenance .....................................................................................................................59
9. Troubleshooting ..................................................................................................60
10. Uninstalling and disposal of the unit .................................................................62
11. Options .............................................................................................................. 63
11.1. Protective treatment on heat exchangers – TREATS ................................................................63
11.2. Electrical reheat – RSC .........................................................................................................................63
11.3. Kit for low external temperatures - Winter kit ...............................................................................63
11.4. Main switches - SWTS/SWMS...........................................................................................................64
11.5. Crankcase heater for compressor – CRA ......................................................................................65
11.6. Refrigerant R134a .................................................................................................................................65
11.7. Soft start for three-phase compressor – SOFTT ........................................................................68
11.8. Soft start for single-phase compressor – SOFTM ......................................................................70
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