1. XA(T,V)S 650-750-850 CD7 Compressors
Scott Ellinger
Committed to sustainable productivity

2. Systems Overview XAS 750 CD

3. Product Designation Oil Injected Compressors
Engine supplier
C : Caterpillar
D : Deutz
J : John Deere
Y : Yanmar
K : Kubota
Working principle
A : Single stage compressor
R : Two stage compressor
Product range
X : Oil injected
portable compressor
Silencing
: Un-silenced
S : Silenced
Prime mover
D : diesel engine
E : electric motor X A T S
750 C D
Capacity (FAD)
Liter/sec CFM (US-version)
Working pressure
: std pressure psi
M : psi
T : psi
H : psi
V : psi

4. Compressor systems Air system Oil system Control system
Four major components :
Air system
Oil system
Control system
Electrical system

5. Air system
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

6. Air filter centrifugal dust separation paper filter element
Filtration of the inlet air in 3 stages :
centrifugal dust separation
paper filter element
safety cartridge
Vacuum indicator gives an indication when the pressure drop over the filter element is too high  filter element needs to be replaced

7. Air filter Centrifugal separation Air inlet Vacuum indicator
Filter element
Dust
to compressor element

8. REGULATING SYSTEM REG VALVE
Spring loaded
Adjusting receiver pressure
by changing spring tension
to pressure gauge and loading valve
to speed regulator
to unloading valve
Regulating pressure:
Receiver pressure
In order to regulate the pressure inside the reciever tank of our compressor, the air intake and the engine speed have to be controlled. This is done pneumatically. For that reason, we need regulating pressure. The regulating valve reduces the pressure inside the tank, thus providing the regulating pressure. This regulating pressure is then supplied to the unloader valve and the speed regulator or RPS.
The air receiver pressure can be set to another value by adjusting the spring tension of the regulating valve. This is done by turning the handle on top the valve. Increasing the spring tension, by turning in, will increase the regulating pressure and consequently the pressure inside the vessel. Turning out will decrease the pressure.
Regulating valve service kit

9. Unloading valve Open position at load condition => Air consumption
Opens and closes the air inlet to the compressor element.
Open position at load condition => Air consumption
Closed position at no load condition => No air consumption.
Control of the valve by regulating pressure.

10. Unloading Valve or Air System Inlet Valve
Legend
Receiver Pressure
From Pressure Regulator right now very low to zero pressure
Opens by intake suction
Control Air closes the inlet
Unloading valve service kit –

11. No-Load Condition Load Condition
Unloading valve
Regulating valve
Unloading valve
Regulating valve
Min Press valve
Load solenoid
Min Press valve
Load solenoid

12. Unload Condition Blow- Down Condition
Unloading valve
Regulating valve
Unloading valve
Regulating valve
Min Press valve
Load solenoid
Min Press valve
Load solenoid

13. AIR SYSTEM MIN PRESS VALVE
Maintains a minimum pressure
of 58 PSI for oil flow
Also contains the final check
valve

14. Oil System
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

15. Oil System Air receiver Oil cooler Oil filter/TBV Compressor element
Oil separator
Scavenge line
The following slides explain how the regulating system of the XA(H)S works. They will give you an overview of the different parts and their function.

16. Oil injected screw compressors

17. Compressor element
Lubrication to the bearings
Air inlet
Oil
Air/Oil

18. Oil injected screw compressors
Oil is used for :
Cooling : compression heat is absorbed by the oil
Lubrication of rotors, bearings, gears
Sealing between rotors and rotor and housing
Corrosion protection of the internal metal parts

19. Oil injected screw compressors
Oil is injected in the bottom of the rotor housing,
on the bearings and gears

20. Compression principle
Suction
Compression start
Delivery
Compression

21. Oil separator Scavenge line Separator element Centrifugal separation
Oil Separator filter element should be replaced
Every 1,000 hours or yearly.
Centrifugal separation
Oil
Air/Oil

22. Oil Separator Separator Element Service Kit – 2911 0112 00
Classic Reasons For Oil Carryover
Over filled receiver
Plugged scavenge line
Wrong type of oil (no anti foam agent)
Shut down with air outlet valves open
Scavenge tube installed improperly
Separator Element Service Kit –

23. Oil Filters 2 filters in parallel Bypass opens at 36 psi
Remove contamination from compressor oil
2 filters in parallel
Bypass opens at 36 psi

24. Thermostatic Valve Size 2 (XAS 1800, XRVS 1000-1350) Size 1 ½

25. ! Thermostatic Valve Position of valve & spring = critical
When valve is fitted improperly, oil will be continuously cooled, creating a lot of condensate

26. Oil Stop Valve/Check Valve assembly
Oil stop valve and check valve integrated into one assembly
Check valve prevents reverse flow of air
Oil stop valve prevents flooding of oil at shutdown

27. Oil Stop Valve Spring loaded valve
Oil & air mixture
To compressor element
Spring loaded valve
Prevents element from flooding with oil after shut down
Closed by spring force and oil pressure
Opens by discharge air from element
Drain : lowest point of element
Oil from filters

28. Control System

29. Control Panel

30. XC2002 Status

31. XC2002 Menus

32. Basic Operations

33. Shutdown

34. XC2002 Service Timer Reset
Scroll through the controller menu to “Parameters” (on some units “Parameters” may be a submenu under “Extra Views”)
Press Enter to select Parameters
Scroll to ST1 Reset or ST2 Reset as needed (ST1 = 500 hours, ST2 = 1000 hours)
Press Enter to select to reset the appropriate timer
Prompt for Password: change to 2003 and press Enter
Center option will highlight; scroll to change to “Yes” and press Enter
Service timer is reset

35. XC2002 Alarms

36. XC2002 Alarms
If an Alarm occurs, a pop-up window will display for as long as the alarm is active, in any view. The flashing red Alarm LED will light up. The Alarm icon(s) will be shown with an acknowledgement check box. Push the Enter button to acknowledge the alarm. An acknowledged Alarm will mark the check box and light the red Alarm LED. An Alarm should always be acknowledged before solving the cause of the Alarm. The Alarm display can be left by pushing the Back button. If more than one Alarm occurs, the Up and Down arrows may be used to scroll through the list. Newest Alarms will be at the bottom of the list. If a Shutdown occurs, the Shutdown Display will be shown.

37. XC2002 Event Log XC2002 keeps an event log of the last 15 events.
Shutdowns
Warnings
Service timer resets
Unit type changes
Running hours at time of event logged

38. Engine Faults

39. Compressor Faults

40. Electrical System

41. Wiring Diagram (1)

42. Wiring Diagram (2)

43. Maintenance

44. Maintenance – XA(T,V)S 650-750-850 CD IT4
Daily:
Check engine oil level
Check compressor oil level
Check coolant level
Drain water from fuel filter
Empty air filter vaccuator valve
Check tire pressure

45. Maintenance – XA(T,V)S 650-750-850 CD IT4
Initial Service at 50 Hours
Check electrolyte level and terminals of battery
Check for leaks in Air, Oil, and Fuel systems
Check wheel nut torque
Check and adjust brakes
Check and adjust fan belts
Replace compressor oil filters (spin-on)

46. Maintenance – XA(T,V)S 650-750-850 CD IT4
500 Hour service (typical 6 months)
Perform 50 hour service tasks
Clean oil cooler, radiator, intercooler
Grease door hinges
Grease towing eye shaft or ball coupling and shaft
Analyze coolant
Replace engine oil and filter
Replace fuel primary filter and prefilter

47. Maintenance – XA(T,V)S 650-750-850 CD IT4
1000 Hour service (typical 12 months)
Perform 500 hour service tasks
Test safety valve and shut down switches
Check rubber flexibles
Replace air filters and separator element
Replace compressor oil and filter
Replace bleed off valve unloader
Clean oil stop valve and fuel tank
Replace filter element from regulating valve
Clean flow restrictor in oil scavenge line
Inspection by Atlas Copco service technician
Check/adjust engine valves every 2000 hours or per Caterpillar

48. IT4 EXHAUST AFTERTREATMENT

49. Tier 4: DOC and DPF Diesel Particulate Filter (DPF)
Diesel Oxidation Catalyst (DOC)
CEM- Cleaning Emission Module

50. Tier 4: Diesel Oxidation Catalyst (DOC)
Open cell substrate flow though device
Reduces HC and CO significantly
Reduces Pm 10 to 30%
Converts NO to NO2 for passive regeneration of the DPF
Oxidizes HC (diesel fuel) as part of active regeneration strategy
No servicing required
Requires use of low sulfur diesel or ULSD
Typically element is =100% of engine displacement in size 50

51. Tier 4: Diesel Particulate Filter (DPF)
Wall flow, high filtration efficiency (95%+)
Traps ash, soot and any particles
Needs periodic regeneration / cleaning
Periodic ash cleaning required
No muffler required in the vast majority of applications 51

52. Tier 4: Regeneration Active Regeneration
Particulate matter left in the filter system is burned off extending the lifetime of the filter.
Uses a fuel burner in the exhaust stream that intermittently raises the temperature above 600°C (1112°F)
Converts particulate matter to CO2 & Ash.

53. XC2002 DPF Status Indicators

54. Xc2002 – DPF Information Regeneration functions Parameter
DPF – Diesel Particulate filter – can change from AUTO to ON or turn OFF completely (not recommended!)
STATION REGEN. – Stationary (manual) Regeneration – OFF or ON
Both need to be set to “ON” for manual regeneration
Both are password protected
Unit will auto regenerate when soot level reaches ~70% with unit in auto mode

55. Procedure: Stationary/Forced DPF Regeneration
Atlas Copco recommends that the DPF configuration be left in the AUTO mode at all times however in the event that a stationary or forced regeneration in desired the following process should be followed.
Unit will not auto regenerate until soot level is above 70%
Go to the "STATION REGEN" screen. For normal operation this should be in OFF mode.
Press the enter button (1), a password window will appear. Enter 1968 and press the enter button.
Use the up or down (2) arrow to change the selection to ON and press the enter button.
Go to the "DPF" screen. For normal operation this should be in the AUTO mode.
Press the enter button (1)
This will set the unit up for regeneration, after a few moments the regeneration icon should appear confirming the unit is regenerating.
The stationary/forced regeneration can take in excess of 3 hours to complete. 1 2

56. Contact Numbers Main Number Atlas Copco Technical Support
Option 3
Ed Kukfisz – Compressors – Supervisor
direct & mobile
Andrew Stevenson – Compressors: Low Pressure
direct & mobile
Andrew Calendar – Compressors: High Pressure
direct & mobile
Scott Ellinger – Compressors
direct & mobile
Robert Walsh – Generators – Supervisor
direct (mobile)
Will Hudson – Generators/Compressors
Ext & mobile
Brandon Hobbs – Hydraulic Attachments /Handheld Construction Tools – Supervisor
direct & mobile
Al Eckenfels – Hydraulic Attachments/Handheld Construction Tools

57. Committed to sustainable productivity.