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Air Compressor
LT22
Atlas Copco LT22 User Manual
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2920 1257 04
38
Instruction book
Fig. 5.3 V
iew of air pressure switch MDR4
Fig. 5.4 Adjusting screws MDR4
Fig. 5.5 Pressure difference diagrams MDR4/1
1 bar and MDR4/25 bar
Example: LE
Stopping pressure: 7 bar(e)
Starting pressure: adjustable between 3 and 5.7 bar(e)
1
Air pressure switch
2
Solenoid valve
3
Pressure release valve
4
Adjusting screw
, stopping pressure
5
Adjusting screw
, pressure difference
Figs. 5.3 up to 5.5 Air pressure switch
1
2
3
50960F
4
5
50961F
37
39
Table of Contents
Default Chapter
2
Table of Contents
2
1 Leading Particulars
3
General Description
3
Compressor Variants
3
Air Flow
3
LE/LF15 up to -40, LE55 and LE75 50 Hz
3
LE75 60 Hz, LE110/150, LF55/75 and
3
Regulating System
3
LE/LF/LT15 up to -55 with DOL Starter
3
LE/LT40 up to -150, LF40 up to -75, each with Y/D Starter
6
LE/LF/LT Trolley
8
2 Installation and Handling
10
Dimension Drawings
10
Installation Proposals
25
Le/Lf/Lt
27
LE/LF/LT Trolley
27
Electrical Connections
27
Settings of Overload Relay - Fuses - Cable Size
30
Settings of Overload Relay - Fuses of Compressors with DOL Starter
30
Settings of Overload Relay - Fuses of Compressors with Y-D Starter
31
Cable Size
32
Pictographs
32
3 Operating Instructions
32
Initial Start-Up
32
Starting
32
Stopping
33
Taking out of Operation at End of Compressor Service Life
33
4 Maintenance
34
Petrol Engine Maintenance
34
Preventive Maintenance Schedule for the Compressor
34
Lubrication of LE/LT Compressors
35
Service Kits
35
5 Servicing and Adjustment Procedures
36
Unloader or Check Valve
36
Valves
36
Air Filter
37
Adjustment MDR4 Pressure Switch
37
Adjustment MDR5/6 Pressure Switch
39
Adjustment Pilot Valve on Trolley
39
Safety Valve
40
Relief Valve on LF55/75, LE75 up to -150 and LT
40
6 Problem Solving
41
Principal Data
42
Reference Conditions
42
Limitations
42
Compressor Data for LE 10 Bar
42
50 Hz
42
60 Hz
43
Compressor Data for LF 10 Bar
43
60 Hz
44
Compressor Data for LT 15 Bar
44
60 Hz
45
Compressor Data for LT 20 Bar
45
60 Hz
46
Compressor Data for LT 30 Bar
46
60 Hz
47
8 Conversion List of si Units into Us/British Units
48
4
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Atlas Copco LT22 Specifications
General
Brand
Atlas Copco
Model
LT22
Category
Air Compressor
Language
English
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