i.1
[en] 02/2014
Installation and operating manual - NK 31
Foreword ............................................ 1.1
General ............................................... 1.1
Scope .................................................. 1.1
Change service ................................... 1.1
Abbreviations ...................................... 1.1
Manufacturer’s information ................. 1.1
1.5.1 General information ............................ 1.1
1.5.2 Purpose ............................................... 1.2
1.5.3 Standard delivery scope ..................... 1.2
1.6
liability disclaimer ................................ 1.2
Nameplate ........................................... 1.2
Safety precautions ............................ 2.1
Marking of safety precautions ............. 2.1
Safety regulations ............................... 2.1
General safety precautions ................. 2.1
Technical Description ....................... 3.1
Screw Compressor Compact Module
(standard model with electric control
unit) ..................................................... 3.1
(electric control unit) ............................ 3.2
Operating description for NK 31
Screw Compressor Compact Module
(electric) .............................................. 3.2
3.3.1 Standstill ............................................. 3.2
3.3.2 Relieved stating .................................. 3.3
3.3.3 Feed phase ......................................... 3.3
........................................ 3.3
Screw Compressor Compact Module
(standard model with pneumatic
control unit) ......................................... 3.4
(pneumatic control unit) ...................... 3.5
Operating description for NK 31
Screw Compressor Compact Module
(pneumatic) ......................................... 3.5
3.6.1 Standstill ............................................. 3.5
3.6.2 Starting ................................................ 3.6
........................................ 3.6
(START-STOP controller) .................... 3.7
Operating description for NK 31
Screw Compressor Compact Module
(START-STOP controller) .................... 3.7
3.8.1 Standstill ............................................. 3.7
3.8.2 Load condition..................................... 3.8
........................................ 3.8
Intake valve ......................................... 3.9
3.9.1 Installation position ............................. 3.9
................................... 3.10
3.10.1 Micro air filter element
3.10.2 Intake filter monitoring
3.11 Fine separator ....................................3.11
3.11.1 Oil intake non-return valve .................3.11
3.11.2 Fine separator cartridge .................... 3.12
3.11.3 Minimum pressure valve ................... 3.13
3.12 Air-oil circulation outside
compressor module .......................... 3.14
.............................................. 3.15
3.12.2 Oil thermostat .................................... 3.15
3.13 Oil cooler/air after-cooler (option) ..... 3.16
3.14 Safety valve (SIV) (option) ................ 3.16
Transport ........................................... 4.1
Delivery and packing........................... 4.1
Transport damage ............................... 4.1
Transporting unpacked system ........... 4.2
Transport options ................................ 4.2
Installation/Assembly ....................... 5.1
Connection thread/assembly .............. 5.1
................................ 5.1
5.1.2 Pipe connections................................. 5.1
5.2
Safety precautions for installation
and assembly ...................................... 5.1
Installation ........................................... 5.2
5.3.1 Fastening on base frame with
......................................... 5.2
5.3.2 Drive .................................................... 5.2
5.4
Belt drive ............................................. 5.3
Direct drive .......................................... 5.3
Air outlet .............................................. 5.4
Oil cooling ........................................... 5.4
Service ................................................ 5.4
Commissioning ................................. 6.1
Preparation for commissioning ........... 6.1
Checking direction of rotation ............. 6.1
Test run ............................................... 6.1
Recommissioning screw compressor
system ................................................. 6.2
Contents