MIL'S 42SP2 Instruction Manual

-ENGLISH VERSION-
GENERAL INSTALLATION AND MAINTENANCE INSTRUCTIONS
SCROLL ENCLOSURE AIR COMPRESSOR
42SP2 – 63SP2 – 84SP2
SAFETY RULES see manual n°512072
This document must not be disclosed or reproduced without permission from MIL'S.
Failure to respect this requirement may lead to prosecution.
- 09/07 – MANUAL N° 5.18396. VERSION 0 - GB -

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Page 1 / 22 09/2007 Manual N° 5.18396. VERSION 0 - GB
CONTENTS
SECTION 1. DESCRIPTION 2
1.1. UNPACKING .............................................................................................................................................. 2
1.2. PRECAUTIONS DURING TRANSPORTATION AND MOVEMENT............................................................................. 3
SECTION 2. GENERAL SAFETY INFORMATION 4
SECTION 3. COMPONENT DESCRIPTION 5
3.1. COMPRESSION CYCLE ................................................................................................................................6
3.2. TIP SEAL................................................................................................................................................... 6
3.3. BEARINGS ................................................................................................................................................ 6
3.4. AIR COOLED AFTER-COOLER....................................................................................................................... 6
3.5. DRY TYPE INLET FILTER.............................................................................................................................. 6
3.6. COOLING AIR CLEANABLE FILTER SCREEN.................................................................................................... 6
3.7. HIGH TEMPERATURE SHUTDOWN SWITCH ..................................................................................................... 6
SECTION 4. INSTALLATION 6
4.1. INSTALLATION SITE .................................................................................................................................... 6
4.2. VENTILATION............................................................................................................................................. 7
4.3. WIRING..................................................................................................................................................... 7
4.4. PIPING...................................................................................................................................................... 7
4.5. SAFETY VALVES ........................................................................................................................................ 7
SECTION 5. OPERATION 7
5.1. BEFORE START-UP .................................................................................................................................... 7
5.2. START-UP AND OPERATION......................................................................................................................... 8
5.3. STOPPING THE COMPRESSOR DURING EMERGENCY OPERATION...................................................................... 8
SECTION 6. SPECIFICATIONS 8
SECTION 7. OPERATION DIAGRAM 9
7.1. REMOTE CONTROL..................................................................................................................................... 9
7.2. INDEPENDENT OPERATING .......................................................................................................................... 9
SECTION 8. CONTROL AND REGULATION DEVICE : MILLENIUM 10
8.1. MANAGEMENT OF PARAMETERS ................................................................................................................ 10
8.2. MANAGEMENT OF ALARMS........................................................................................................................ 10
8.3. HIGH PRESSURE ...................................................................................................................................... 11
SECTION 9. TROUBLESHOOTING GUIDES 12
SECTION 10. MAINTENANCE SCHEDULE 13
SECTION 11. SCHEDULED MAINTENANCE 14
11.1. INTAKE FILTER......................................................................................................................................... 14
11.2. VENTILATION SCREEN .............................................................................................................................. 14
11.3. INSPECT V-BELT TENSION ........................................................................................................................ 14
11.4. GREASE COMPRESSOR BEARINGS............................................................................................................. 15
11.5. GREASE PIN CRANK BEARING.................................................................................................................... 15
11.6. REPLACE TIP SEAL................................................................................................................................... 15
SECTION 12. REPLACEMENT PARTS LIST 17
SECTION 13. SERVICE PARTS LIST 21

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Manual n° 5.18396. VERSION 0 – GB 09/2007 Page 2 / 22
Please read and save these instructions. Read carefully before attempting to assemble, install, operate or maintain the
product described. Protect yourself and others by observing all safety information. Failure to comply with instructions
could result in personal injury and/or property damage! Retain instructions for future reference.
SAFETY GUIDELINES
This manual contains information that is very important to know and understand. This information is provided for SAFETY
and to PREVENT EQUIPMENT PROBLEMS. To help recognize this information, observe the following symbols.
Danger indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
Warning indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
Caution indicates a potentially hazardous situation which, if not avoided, MAY
result in minor or moderate injury.
Notice indicates important information, that if not followed, may cause damage
to equipment.
SECTION 1. DESCRIPTION
Scroll Enclosure Air Compressors are designed to supply continuous oil-free air by using the most advanced scroll
technology. These turn-key packages are extremely quiet and offer electronic control that will reduce electrical power
consumption.
The Oil-less Rotary Scroll Air Compressor has advanced scroll compressor technology through the development of a
completely oil-less unit. The Scroll Compressor offers a dynamically balanced air end which insures vibration-free
operation. The rotary design permits a continuous 100% duty cycle. No oil separation, oil filtration, or inlet valves are
required on the Scroll unit. The compressor is virtually maintenance free.
1.1. Unpacking
After unpacking the unit, inspect carefully for any damage that may have occurred during transit. Make sure to tighten
fittings, bolts, etc., before putting unit into service.
Do not operate unit if damaged during shipping, handling or use. Damage
may result in bursting and cause injury or property damage.

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Page 3 / 22 09/2007 Manual N° 5.18396. VERSION 0 - GB
1.2. Precautions during transportation and movement
1.2.1. Transportation by forklift
Use openings for forklift under both sides of the unit.
Avoid damaging the panel with tips of the forklift.
1.2.2. Transportation by crane
Use openings at the bottom of the unit and lift up by wire, etc.
Be sure to use pads in order to protect panels.

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Manual n° 5.18396. VERSION 0 – GB 09/2007 Page 4 / 22
SECTION 2. GENERAL SAFETY INFORMATION
The operator of this compressor must take the necessary precautions to prevent the level of danger indicated by these
symbols. The operator is also required to read and understand this instruction manual and all safety warnings, labels,
etc.
Any employer allowing the use of this compressor in their field of work must distribute this instruction manual to all
users. The employer must also ensure all users read, understand and follow the instructions as described in the manual,
safety warnings, labels, etc.
1. Read and understand all safety warnings and instructions before operating this compressor. Failure to
read and follow all safety warnings may result in serious personal injury or death. Property damage
and/or compressor damage may also occur if all warnings are not followed.
Motors, electrical equipment and controls can cause electrical
arcs that will ignite a flammable gas or vapor. Never operate or
repair in or near a flammable gas or vapor. Never store flammable
liquids or gases in the vicinity of the compressor.
2. Safety Valves or Relief Valves used on this compressor must be in accordance with safety standards. Improperly
sized Safety Valves will result in serious personal injury or death.
Do not remove the panel or try to service the air compressor
while the compressor is running or while the air receiver is under
pressure. Serious personal injury or death will occur.
4. Never use rubber hoses, plastic piping or soldered joints in any part of the compressed air or gas system. The
compressor and system piping must be compatible.
5. The compressor will shutoff when the pressure reaches a predetermined maximum pressure. Care should be used
since the compressor may suddenly restart automatically when the pressure drops to the predetermined minimum
pressure. Never assume the compressor is ready for service just because the unit is stopped.
6. All pressure must be drained from the compressor and the electrical source must be turned off before attempting to
inspect or repair the unit.
7. Keep clear of all moving parts especially if the compressor is operating with the door panel removed for inspection or
repair.
Do not touch HOT parts of the compressor such as the air end,
discharge pipe, after-cooler, motor, etc
8. Keep flammable gases away from the compressor. Parts of the compressor become very hot during
operation and the vapors from flammable gases may cause the unit to explode.
9. Never use flammable or toxic solvents to clean the compressor or any of the unit’s parts.
10. Do not remove or tamper with any safety devices, guards, panels or insulation parts while compressor is in ope-
ration. All guards or panels must be in place before starting or operating the compressor.
Install a properly sized Safety Relief Valve in the discharge piping
ahead of or before a shut-off valve, heat exchanger, orifice, etc.
The compressor or part of the system could rupture or explode if
a Safety Relief Valve is not installed.
11. Do not change the pressure setting of the Safety Relief Valve. Do not replace the Safety Relief Valve with a plug or
restrict the Safety Relief Valve. The system or the compressor may be over-pressurized if the Safety Relief Valve is
tampered with in any way.
12. Do not service the compressor or any compressor part while the unit is in operation.
13. Do not remove, disconnect or tamper with the High Temperature Shutdown Switch. The High Temperature
Shutdown Switch must be installed on the compressor to protect against high temperatures damaging the
compressor.

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Page 5 / 22 09/2007 Manual N° 5.18396. VERSION 0 - GB
14. All electrical connections should be made by a qualified electrician.
Disconnect all power supplies to the compressor before opening
the electrical box or before servicing the unit. High voltage may be
present.
15. Never remove or alter any safety warning labels, tags, etc. located on or provided with compressor.
16. Always provide a clean air source for your compressor. Keep all piping direct and short when using an outside air
source.
17. Locate compressor inlet system away from possible ingestion of flammable or toxic vapors, water, dirty air or air
temperatures exceeding 40°C.
18. Never set the pressure to a higher setting than the one provided from the factory.
19. Check all gauges daily to be sure the compressor is operating correctly.
20. Follow all directions for maintenance. Check all safety devices according to instructions.
21. Never attempt to lift or move the compressor except when using the proper lifting procedures.
22. Make sure all electrical components follow the state and local codes when installing the compressor.
23. Do not operate the compressor if unusual noise or vibration occurs.
24. Keep all panels in place at all times.
25. Standard motors are not appropriate for dirty, wet or explosive areas.
26. All service should be performed by trained and qualified people only.
27. The Drive Belt tension should be checked often during initial operation of the compressor.
28. Never substitute oil bath or oil wetted filters for the inlet filters provided with the compressor.
SECTION 3. COMPONENT DESCRIPTION
The 42SP2 type is equipped with 2 units, the 63SP2 type with 3 units and the 84SP2 with 4 units.
Each scroll compressor unit has a flow rate of 21 m³/h for 10 bar maxi.
The compressor is composed by a multiplication of scroll compressor unit.
Safety
valve
Discharge
sensor
Pressure
valve
Check
M
M
Intake
filter
M
T4
T3
valve
T2
Cp
M
Temperature
transducer
T1
Exhaust
Air-end
Air-end
Air-end
Air-end
After-cooler

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Manual n° 5.18396. VERSION 0 – GB 09/2007 Page 6 / 22
3.1. Compression cycle
The Oil-less Rotary Scroll Air Compressor is based on the theory of scroll compression. A scroll is a free standing,
intricate spiral bounded on one side by a solid, flat plane or base. A scroll set, the basic compression element of a scroll
compressor, is made up of two identical spirals which form right and left hand parts. One of these scroll components is
indexed or phased 180° with respect to the other so the scrolls can mesh. Crescent-shaped gas pockets are formed and
bounded by the spirals and the base plate of both scrolls. As the moving scroll is orbited around the fixed scroll, the
pockets formed by the meshed scrolls follow the spiral toward the center and diminish in size. The moving scroll is
prevented from rotating during this process so the 180° phase relation-ship of the scrolls is maintained. The
compressor’s inlet is at the outer boundary of the scrolls. The entering gas is trapped in two completely opposite gas
pockets and compressed as the pockets move toward the center. The compressed gas is discharged through the outlet
at the center of the fixed scroll so no valves are needed.
3.2. Tip seal
The tip seal on the scroll compressor is self-lubricated and allows the unit to operate efficiently without oil and expensive
filtration. The tip seal should be replaced every 10 000 hours (5 000 hours for high pressure models) of operation.
3.3. Bearings
The bearings on the scroll compressor are regreaseable to allow extended compressor life. Service should be performed
every 10,000 hours (5,000 hours for high pressure models) of operation.
3.4. Air cooled after-cooler
The air cooled after-cooler on the scroll compressor is a series of deep alloy cooling fins and a high output cooling fan.
These cooling features allow the scroll compressor to provide a maximum discharge air temperature of 17°C above the
ambient temperature.
3.5. Dry type inlet filter
The inlet filter on the scroll compressor assures 99% of particulate free air is admitted to the unit. Change every 2 500
hours or more often in dirty locations. These filters can be accessed from the front panel.
3.6. Cooling air cleanable filter screen
The cooling air cleanable filter screen on the scroll compressor is located on the rear of the unit and should be cleaned
periodically.
3.7. High temperature shutdown switch
The high temperature shutdown switch on the scroll compressor protects the unit when an unusually high temperature in
the air end is detected. The compressor will shutdown when this high temperature is detected.
SECTION 4. INSTALLATION
4.1. Installation site
The scroll compressor must be located in a clean, well lit and well ventilated area. A contaminated area can clog the
intake filter and/or intake metal mesh.
The area should be free of excessive dust, toxic or flammable gases, moisture and direct sunlight.
Never install the compressor where the ambient temperature is higher than 40°C or where humidity is high. High
humidity will cause electrical short circuit and rusting of components.
Clearance must allow for safe, effective inspection and maintenance. 1 meter of clearance for sides, 1 meter clearance
from the top is recommended.
If necessary, use metal shims or levelling pads to level the compressor. Never use wood to shim the compressor.

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Page 7 / 22 09/2007 Manual N° 5.18396. VERSION 0 - GB
4.2. Ventilation
If the scroll compressor is located in a totally enclosed room, an exhaust fan with access to outside air must be installed.
Never restrict the cooling fan exhaust air.
Vent the exhaust air outside to prevent the compressor from operating at high temperatures and shutting down.
Never locate the compressor where hot exhaust air from other heat generating units may be pulled into the unit.
4.2.1. Suggested ventilation system
1. The following ventilation capacity is designed to keep the temperature rise inside the room to be max. 10°F. Since
the calculation is based on zero static pressure, the actual ventilation capacity should be larger than the figure in
Chart 1.
2. Install the exhaust duct in order to minimize the pressure lost of the ducting. Keep the distance between the inlet
duct and the compressor exhaust to be at least 0.3 meter for ease of maintenance. Intake section of the duct
should be larger than the dimension of compressor exhaust shown below:
Model 42 SP2 63 SP2 84 SP2
Ventilation capacity (m³/h) 1560 2287 3120
Chart 1
4.3. Wiring
All electrical hook-ups must be performed by a qualified electrician. Installations must be in accordance with local and
national electrical codes.
•Use solderless terminals to connect the electric power source.
•Remove front panel.
•Remove the rectangle electrical box cover located beneath air inlet filter on the right front of the unit.
•Connect the power inlet cable to the inlet power junction block located on the inlet side of all starter connections.
Consult your NEC and local codes for wire size.
4.4. Piping
These units do not include air receivers. An air receiver can be purchased separately. Please consult our distributors.
•Make sure the piping is lined up without being strained or twisted when assembling the piping for the scroll
compressor.
•Appropriate expansion loops or bends should be installed at the compressor to avoid stresses caused by changes in
hot and cold conditions.
•Piping supports should be anchored separately from the compressor to reduce noise and vibration.
•Never use any piping smaller than the compressor connection.
•Use flexible hose to connect the outlet of the compressor to the piping so that the vibration of the compressor does
not transfer to the piping.
4.5. Safety valves
Tank must be equipped with safety valves in the air receiver manifold. The flow capacity of the safety valve is equal to or
greater than the capacity of the compressor.
•The pressure setting of the safety valve must not be greater than the maximum working pressure of the air receiver.
•Safety valves should be placed ahead of any possible blockage point in the system, i.e. shutoff valve.
•Avoid connecting the safety valve with any tubing or piping.
•Manually operate the safety valve every six months to avoid sticking or freezing.
SECTION 5. OPERATION
5.1. Before start-up
•Make sure all safety warnings, labels and instructions have been read and understood before continuing.
•Remove any shipping materials, brackets, etc.
•Confirm that the electric power source and ground have been firmly connected.
•Check the belts for tightness.
•Be sure all pressure connections are tight.
•Check to be certain all safety relief valves, etc., are correctly installed.

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Manual n° 5.18396. VERSION 0 – GB 09/2007 Page 8 / 22
•Securely mount all panels and guards.
•Check that all fuses, circuit breakers, etc., are the proper size.
•Make sure the inlet filter is properly installed.
•Confirm that the drain valve is closed.
•Visually check the rotation of the compressor pumps. The rotation should be counter-clockwise if viewing the
compressor from the pulley or belt side of the motor or the air end. If the rotation is incorrect, have a qualified
electrician correct the motor wiring.
5.2. Start-up and operation
•Follow all the procedures under “Before start-up” before attempting operation of the compressor.
•Switch on the electric source breaker.
•Make sure alarm does not show up on the display.
•If alarm "backwards" is showing up on the display, the unit is running backwards. Have a qualified
electrician switch the breaker OFF and exchange two out of three phases of electric source.
•Check the discharge pressure. Also make sure the air pressure rises to the designated pressure setting by checking
the discharge pressure gauge.
CYCLIC 2000J or PROCOM: Since the compressors are designed using multiple air-ends, they are using CYCLIC
2000J or PROCOM controller. The controller will start and stop each air-end according to the pressure and air
consumption.
1) Alternating Control:
The controller will alternate the priority of the air-end.
2) Prevention of long term operation:
When an air-end has been operating longer than the set-time, the controller will start a second air-end. This will
prevent one air end from running continuously for too long and will equalize the running time between the
available air ends.
5.3. Stopping the compressor during emergency operation
•Stop the compressor by switching the breaker OFF or by turning the power off at the main disconnect panel.
SECTION 6. SPECIFICATIONS
MODEL 42SP2 63SP2 84SP2
Air end 2 x SLAE 05 EHP 3 x SLAE 05 EHP 4 x SLAE 05 EHP
P. max 10 bar 10 bar 10 bar
Air delivery @ (100 psig) 42 m³/h 63 m³/h 84 m³/h
Compressor speed 3150 rpm 3150 rpm 3150 rpm
Noise level (1.5m from front) 53 dB(A) 56 dB(A) 58 dB(A)
Power 8 kW 12 kW 16 kW
Voltage 400V+N+G 400V+N+G 400V+N+G
Frequency 50 Hz 50 Hz 50 Hz
Current 18.2 27.3 36.4
Protection fuse 25 40 50
Cable section mm² 6 10 10

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Page 9 / 22 09/2007 Manual N° 5.18396. VERSION 0 - GB
SECTION 7. OPERATION DIAGRAM
7.1. Remote control
To use the remote control mode, close the dry contactor between the '3' and '5' terminals.
If in the same time, there are the remote control and the independent operating modes, the remote control mode is
priority.
1s.
1s.
1s.
Stop
Stop
Discharge valve
OFF
ON
Running
Running
Unit 4
Unit 3
Stop
Running
Unit 2
Stop
Remote control
Running
Unit 1
ON
OFF
10 bar
9 bar
1s.
1s.
1s.
7.2. Independent operating
To use the independent operating mode, turn on the button with a key inside the electrical box.
9 bar
Running
Unit 4
Stop
Running
Unit 3
Stop
Independent operating
Running
Running
Unit 2
Unit 1
Stop
Stop
OFF
ON
10 bar

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Manual n° 5.18396. VERSION 0 – GB 09/2007 Page 10 / 22
SECTION 8. CONTROL AND REGULATION DEVICE : MILLENIUM
•First line:P: 0009.6: pressure in bar
T1: 00055: temperature of the scroll unit 1
T2: 00055: temperature of the scroll unit 2
T3: 00055: temperature of the scroll unit 3
T4: 00055: temperature of the scroll unit 4
•Second line: SCROLL operating
•Third line: different alarms
•Fourth line: parameters, hour meters, program number
8.1. Management of parameters
By pressing the button several times, the fourth line will display successively:
Pmax 00010: Maximum pressure.
Remote control: at this value, the discharge valve is opened to reduce the pressure, to protect the
scroll compressors units.
Independent operating: At 10 bar, the compressor stops.
HYSTERESIS 0001: Remote control: Hysteresis between the maxi. pressure and the closed pressure of the discharge
valve (10-1=9 bar)
Independent operating: Hysteresis between the maxi. Pressure and the start pressure of the
compressor.
At P.maxi – hysteresis = 10 – 1 = 9 bar, the compressor starts.
Tmax 00075: Maximum temperature (75°C) of the scroll compressor unit.
If the temperature is above 75°C, there is an alarm.
Tmin 00005: Minimum temperature (5°C).
If the temperature is below 5°C, there is an alarm.
HM 1 0000: Hour meter of the scroll compressor unit 1.
HM 2 0000: Hour meter of the scroll compressor unit 2.
HM 3 0000: Hour meter of the scroll compressor unit 3.
HM 4 0000: Hour meter of the scroll compressor unit 4.
M3121GB0: Program N°, V0 is the version (in this example, V0 indicates version 0).
8.2. Management of alarms
** ALARM** appears flashing on the third line and the actives alarms appear :
DISJUNCTION 1 (2, 3 or 4): Rise of current. If current becomes very high, "DISJUNCTION 1" (2,3 or 4) displays and
the scroll compressor unit 1 (2,3 or 4) stops.
T.MAX 1 (2,3 or 4): Rise of maximum temperature. If temperature of the scroll compressor unit 1 (2,3 or 4)
becomes more than 70°C, "T.MAX 1" (2,3 or 4) displays and the scroll compressor unit 1
(2,3 or 4) stops.
T.MIN 1 (2,3 or 4): Rise of minimum temperature. If temperature becomes less than 5°C, "T.MIN 1" (2,3 or 4)
displays and the scroll compressor unit 1 (2,3 or 4) mustn't start.

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Page 11 / 22 09/2007 Manual N° 5.18396. VERSION 0 - GB
BACKWARD: Air-end rotates backward. No scroll compressor unit can start.
If "BACKWARD" displays, switch the breaker OFF and exchange two out of three phases
of electric source by a qualified electrician.
In remote control, when one alarm appears, the dry contact 7 – 8 is inversed and after 90 seconds, the compressor is
blocked by the controller.
Acknowledgement of disjunction and T.MAX
Press the button .after acknowledgement of disjunction or T.MAX.
8.3. High pressure
In case of remote control, if the pressure reaches 10 bar, the discharge valve opens and the message "HIGH
PRESSURE" appears in the third line until the pressure decreases to 9 bar.
This case doesn't stop the compressor.

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Manual n° 5.18396. VERSION 0 – GB 09/2007 Page 12 / 22
SECTION 9. TROUBLESHOOTING GUIDES
Items marked with ▲are not recommended to be fixed by the consumer. Please contact your distributor.
Symptom Possible Cause(s) Corrective Action
No display on 1. Electric source is not turned on 1. Turn on electric source
operating panel 2. Fuse on the circuit board was blown off 2. Replace
3. Electric source is not correctly connected 3. Connect it correctly
4. Failure of circuit board 4. Inspect, repair or replace ▲
It does not 1. Failure or wiring failure of magnetic starter 1. Inspect, repair or replace ▲
operate despite 2. Circuit board failure 2. Inspect, repair or replace ▲
display 3. Motor failure 3. Inspect, repair or replace ▲
4. Low voltage 4.
5.
Inspect, repair or replace ▲
Check electric source capacity, size of electric
source cable
T.max 1,2,3 or 4 1. High ambient temperature, bad ventilation 1. Improve installation environment and ventilation
are displayed 2. Clogging of after cooler fins or intake wire
screen
2. Clean
3. Failure of exhaust fan 3. Replace
4. Damage to intake hose 4. Replace
5. Cooling passage of air end clogs 5. Inspect
6. High exhaust pressure 6. Inspect
Disjunction 1,2,3
or 4 are displayed
1. Low voltage 1. Check electric source capacity, size of electric
source cable and change to proper one.
2. Motor failure 2. Inspect, repair or replace ▲
3. Air-end failure 3. Disassemble, inspect, repair ▲
4. Loosened wiring screw 4. Tighten
5. Pressure increases higher than cut-off pres-
sure
5. Readjust
6. Failure of thermal overload 6. Replace ▲
Pressure does 1. Air leaks from piping 1. Inspect, repair
not increase 2. Air-end rotates backward 2. Change phases
3. Failure of pressure setting 3. Readjust ▲
4. Clogged intake filter 3. Clean or replace
5. Failures of belts 4. Replace ▲
Safety valve 1. Failure of safety valve 1. Replace ▲
bows 2. Failure of pressure setting 2. Readjust ▲
3. Failure of pressure transducer 3. Replace ▲
Abnormal sound 1. Air-end rotates backward 1. Check air-end rotation and change phases
2. Air-end failure 2. Inspect, repair or replace
3. Belt slips 3. Check tension and readjust
4. Motor failure 4. Inspect, repair or replace
5. Exhaust fan blades contacted 5. Inspect and repair
6. Loosened bolts 6. Inspect and tighten

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Page 13 / 22 09/2007 Manual N° 5.18396. VERSION 0 - GB
SECTION 10. MAINTENANCE SCHEDULE
Operating Hours
Item Action Needed 500 2500 5000 10 000 20 000 Remarks
Intake Filter Clean, replace •▲Every 500 hours or less
Ventilation Screen Clean •Every 500 hours or less
Air End/Blower Fan Clean •Every 500 hours or less
Fan Duct Clean •Every 500 hours or less
Compressor Fins Clean •Every 500 hours or less
Compressor Grease ▲▲
(pump)
Use genuine MIL'S grease
(Every 5000 hours for high pressure models)
Tip Seal Replace ▲(Every 5000 hours for high pressure models)
Dust Seal Inspect, replace ▲(Every 5000 hours for high pressure models)
V-belt Inspect, replace * •▲* Readjust
Temperature Sensor •Confirm operation
Pressure Sensor Confirm operation •
Magnetic Starter Inspect •Replace if contact points deteriorated
Check valve Replace ▲
Safety Valve Confirm operation •Every 500 hours or less
Ventilation Fan Inspect •Replace if malfunctions
Pulley Inspect groove •Repair if abnormal wear is detected
Motor Inspect • • Replace if abnormal noise is detected
Intake hose Replace ▲
Air Hose Inspect, replace •▲
After Cooler Clean outside •Every 500 hours or less
O-ring Replace ▲
Operating Panel Inspect monitor
display Daily
Piping Inspect for leakage •
•Inspect
▲Replace
Notes:
1 - Inspect and perform maintenance periodically according to maintenance schedule.
2 - The maintenance schedule relates to the normal operation conditions. If the circumstances and load condition are
adverse, shorten the cycle time and perform maintenance accordingly.
3 - *Marked “Readjust” means the tension of the V-belt should be adjusted during the initial stage and inspected every
2,500 hours afterwards.
Chart 16

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Manual n° 5.18396. VERSION 0 – GB 09/2007 Page 14 / 22
SECTION 11. SCHEDULED MAINTENANCE
Per OSHA regulations, lockout compressor system from
all power sources BEFORE performing any
maintenance.
11.1. Intake filter
•Remove the front panel of the unit.
•Remove the air inlet housing, the wing nut and the
inlet filter element.
•Clean the inlet filter element with compressed air or
replace with a new element.
Note: Never clean filter element with solvents or water.
11.2. Ventilation screen
•Remove the ventilation screen located at the rear of
the unit.
•Clean with compressed air or soap and water, if
necessary.
11.3. Inspect V-Belt tension
•Check V-Belt tension with tension gauge.
•Adjust to the specifications listed in Chart 17.
New Belt Load ± Deflection [Kg/10 mm] Existing Belt Load ± Deflection [Kg/10 mm]
6 ± 0.5 5.5 ± 0.5
Chart 17
Use only MIL'S genuine, grease (Part 412030) or equivalent.
Note: Each pump of the grease gun equals 0.65g of grease. The volume of grease is less after the 2nd pump since
some of the grease supply will remain in the grease passage.
Figure 5 – Air end: to locate the grease fitting on the counter weight, place the key way on the crankshaft as
shown

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Page 15 / 22 09/2007 Manual N° 5.18396. VERSION 0 - GB
11.4. Grease compressor bearings
•Remove the plastic dust cap from the air-end.
•Move the compressor pulley until the grease fitting is visible through the dust cap hole.
•Use a grease gun extension adapter to engage the grease fitting and supply the proper volume of grease as
indicated on the grease delivery chart. See Chart 18.
Model 1st time 2nd time
O.S. Bearing 7 times 6 times
Pin Crank Bearing O.S. Side 7 times 7 times
Chart 18 – Grease Delivery
11.5. Grease pin crank bearing
•Remove the fan duct (2) (Key #6).
•Remove the nuts and bolts and then the fixed scroll from the air end.
•Grease all three pin crank bearings as indicated on the grease delivery Chart 18 above.
Use only MIL'S genuine grease. (Part 412030). Pump grease gun before
feeding to eliminate air from grease passage of the needle adapter.
The grease fitting, located in the center of the pin crank bearing, feeds only
the orbit scroll side bearing. Use a needle adapter to supply grease to the
housing side bearing. Pump grease gun before feeding to eliminate air from
grease passage of the needle adapter. Hold grease gun for 5 - 10 seconds
after feeding to prevent grease blowback from the grease fitting.
11.6. Replace tip seal
•Remove intake hose.
•Remove the discharge hose.
•Remove nuts and bolts that secure fixed scroll.
•Remove the fixed scroll housing.
•Take out the old tip seal from the orbiting scroll housing and
fixed scroll housing, see Figure 6.
•Remove the old dust seals from fixed scroll, see Figure 7.
•Install the new tip seals and dust seals in the stationary and
orbiting scroll housings in the following manner:
Note: Tips seals for Fixed Scroll and Orbit Scroll have op-posing seal cut
angels (See NOTE and explanatory diagram below).
Note: In order to distinguish between the tip seal for Fixed Scroll and the tip
seal for Orbit Scroll place the tip seal as shown below then view from the
arrow direction and refer to the figure on the right.
Figure7

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Manual n° 5.18396. VERSION 0 – GB 09/2007 Page 16 / 22
Insert tip seal so that the lip of tip seal is on the bottom of seal groove and inner side of involute and the direction of lip
faces the center of involute (curving spiral). See Figure 5. This is to be done for both FS and OS sets.
Use caution not to tear or distort lip.
•Insert new HP tip seal from the center section for OS or Orbit Scroll so that there will be no clearance at the tip
(start) section (See Figure 5 and 6).
•Insert so that new LP tip seal will contact closely with HP tip seal inside Scroll Groove.
Insert approximately half of the LP tip seal and remove the tip seal to confirm
that a notch in the tip seal has been created. This will prevent movement
during installation (See Figure 8).
•Repeat the same procedure for FS or Fixed Scroll tip seal set, remove both the dust seal and backup tube located
on outermost side FS set.
Model Size Nm
Pulley bolt M8 19.775
Housing nut (see figure 1) M10 29.945
Chart 19 – Bolt Nm
•Insert new backup tube in the FS Scroll in the 6 o’clock position (See Figure 9).
•Insert new dust seal on the backup tube.
•After replacing tip seal set, reassemble Fixed Scroll set to the Orbit Scroll. Tighten nuts and bolts temporarily and
confirm if pump pulley rotates smoothly by hand and tighten them firmly. Tightening torques are:
First Second
Bolt Nm 1.921 Nm 29.945 Nm
Note: Assemble so that dust seal and tip seal will not drop between Orbit Scroll set and Fixed Scroll set.

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
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SECTION 12. REPLACEMENT PARTS LIST

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
Manual n° 5.18396. VERSION 0 – GB 09/2007 Page 18 / 22

General installation and maintenance instructions
SCROLL ENCLOSURE AIR COMPRESSOR
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