Chicago Pneumatic CPC 4 User manual

Instruction Manual EN
CP COMPRESSOR
Model CPC 40 - 50 - 60
62 305 549 65
CPC 50

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TECHNICAL DATA
STANDARD MACHINES
CPC MODEL 40 50 60
Nominal pressure at full flow PSI 100 125 150 175 100 125 150 175 100 125 150 175
Actual flow *
(as per ISO 1217 : 1996) cfm 166 152 137 118 208 185 164 150 268 234 209 196
Motor power hp 40 50 60
Ø Discharge orifice NPT 1.25” 1.25” 1.5”
Sound level at 3.3 ft
(as per ISO 2157 + 3 db(A)) dB (A) 73 75 73
Capacity gal 5.02 5.02 6.08
Carryover ppm 3 3 3
* Suction pressure: 14.5 PSI abs - Relative humidity: 0 % - Ambient temperature: 68 °F
- Effective discharge pressure : 102 PSI, 138 PSI or 181 PSI (effective)
Dimensions L x W x H 43.34 x 54.77 x 60.87 43.34 x 54.77 x 60.87 43.34 x 54.77 x 60.87
Approximate weight lbs 1532 1576 1742
CPC MODEL 40 50 60
Motor power hp 40 50 60
Main Voltage 230 Volt / 3 / 60Hz
Nominal current (A) 123 152 190
Power supply cable AWG 0 AWG 00 AWG 0000
Fuse protection (RK5) 150 175 200
Main Voltage 460 Volt / 3 / 60Hz
Nominal current (A) 66 79 100
Power supply cable AWG 0 AWG 00 AWG 0000
Fuse protection (RK5) 80 100 125
Main Voltage 575 Volt / 3 / 60Hz
Nominal current (A) 46 57 71
Power supply cable AWG 6 AWG 4 AWG 3
Fuse protection (RK5) 50 70 80
Connection of the electric plate to an external control box
• Install an RC filter on the KM1 coil.
• Install an RC filter on the KM2 coil.
• All connections between external parts and the compressor must be carried out using a shielded cable, which must be
grounded at one of its ends.
WARNING: the operation connection cables between the different elements must never follow the same path
as the existing power cords. A separate installation from the power cords must be carried out.
• Install an RC filter on all the relay coils of the external operation units.

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CONTENTS
PART A: INFORMATION FOR THE USER
1.0 GENERAL CHARACTERISTICS
2.0 INTENDED USE
3.0 OPERATION
4.0 GENERAL SAFETY STANDARDS
5.0 DESCRIPTION OF DANGER SIGNALS
6.0 DANGER ZONES
7.0 SAFETY DEVICES
8.0 POSITION OF LABELS
9.0 COMPRESSOR ROOM
10.0 TRANSPORT AND HANDLING
11.0 UNPACKING
12.0 INSTALLATION
13.0 DIMENSIONAL DRAWING
14.0 COMPRESSOR ILLUSTRATION
15.0 ROUTINE MAINTENANCE
16.0 PERIODS OF INACTIVITY
17.0 SCRAPPING THE UNIT
18.0 LIST OF SPARE PARTS FOR ROUTINE MAINTENANCE
19.0 TROUBLE-SHOOTING AND EMERGENCY REMEDIES
PART B: INFORMATION RESERVED FOR TECHNICALLY SKILLED PERSONNEL
20.0 STARTING UP
21.0 ROUTINE MAINTENANCE FOR TRAINED PERSONNEL
22.0 CHANGING THE OIL
23.0 CHANGING THE OIL SEPARATION FILTER
24.0 BELT TENSION
25.0 FLOW DIAGRAM
IMPORTANT: THERE IS A COPY OF THE WIRING DIAGRAM INSIDE THE ELECTRIC PANEL
ROTARY SCREW COMPRESSOR
CPC 40 - 50 - 60
COMPRESSOR AND MANUFACTURER IDENTIFICATION DATA
1) Position of the identification label
FIG. 1

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INTRODUCTION
In the event of breakdown or malfunction of the compressor, switch it off and do not tamper with it.
If repairs are needed, apply only to a technical assistance center approved by the manufacturer and insist on the use of
original spare parts.
Failure to comply with the above may endanger the safety of the compressor.
Keep this manual for future consultation; the use and maintenance manual is an integral part of the compressor.
Read this manual carefully before carrying out any operations on the compressor unit.
The installation of the compressor unit and all operations involving it must be performed in accordance
applicable with electrical and safety regulations at the installation site.
CHARACTERISTICS AND SAFETY PRECAUTIONS
COMPRESSOR WITH AUTOMATIC START
BEFORE REMOVING THE PROTECTION DEVICES FOR ANY MAINTENANCE WORK ON THE COMPRESSOR,
DISCONNECT THE ELECTRICAL POWER SUPPLY AND MAKE SURE THAT THERE IS NO INTERNAL RESIDUAL
PRESSURE.
THE FAILED COMPLIANCE WITH THE INSTRUCTIONS CONTAINED IN THIS HANDBOOK DETERMINES THE
EXPIRATION OF THE WARRANTY TERMS.
ALL WORK ON THE ELECTRICALS, HOWEVER SLIGHT, MUST BE CARRIED OUT
BY PROFESSIONALLY SKILLED PERSONNEL.
The manufacturer does not accept responsibility for damage caused as a result of negligence of failure to abide by the
instructions given above.
THIS COMPRESSOR IS NOT DESIGNED FOR OUTDOOR INSTALLATION
THIS COMPRESSOR CORRESPONDS TO THE SAFETY REQUIREMENTS FORESEEN BY OSHA
THE LUBRICATING LIQUIDS MUST NOT BE DISCHARGED INTO THE ENVIRONMENT. THESE PRODUCTS MUST
BE DISPOSED OF IN ACCORDANCE WITH GOVERNMENT REGULATIONS.

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1.0 GENERAL CHARACTERISTICS
These units use single-stage rotary screw air compressors with oil injection.
The central unit comprises:
compressor; oil separator; oil cooler, air cooler; fan; electric start; safety and regulation devices; instrument panel.
The unit is completely assembled in the factory; the necessary connections for setting it up are:
•connection to the main power (see installation section)
•connection to the compressed air network (see installation section)
The compressor-motor unit is fitted on the compressor chassis by means of flexible supports: this allows the compressor
unit to be laid directly on the floor without any need of further vibration-damping systems.
2.0 INTENDED USE
The compressor has been built to supply compressed air for industrial use.
The compressor cannot be used in premises where there is a risk of fire or explosion or where work is carried
out which releases substances into the environment which are dangerous with regard to safety (for example:
solvents, inflammable vapours, alcohol, etc.).
In particular the compressor cannot be used to produce air to be breathed by humans or used on direct contact with
foodstuffs.
This compressor must be used only for the purpose for which it was specifically designed.
All other uses are to be considered incorrect and therefore unreasonable.
The Manufacturer cannot be held responsible for any damage resulting from improper, incorrect or unreasonable use.
3.0 OPERATION
Reference flow diagram in section 25.0.
The electric motor and the compressor unit are coupled by means of a belt transmission.
The compressor unit takes in the outside air through the suction valve. The air taken in is filtered by a panel pre-filter
fitted on the panel of the cabinet and by the filter cartridge fitted upstream from the suction valve. Inside the compressor
unit, the air and the lubricating oil are compressed and sent to the oil separating filter where the oil is separated from the
compressed air; the air is then filtered again by the oil separating cartridge to reduce the amount of suspended oil
particles to a minimum. At this point the two flows (of oil and air) are sent to two separate coolers where they are cooled,
using a flow of air taken from the environment by a special fan inside the compressor.
The cooled oil returns to the circuit while the compressed air is sent to the using network.
4.0 GENERAL SAFETY STANDARDS
The compressor may be used only by specially trained and authorized personnel.
Any tampering with the compressor or alterations not approved beforehand by the Manufacturer relieve the latter of
responsibility for any damage resulting from the above actions.
The removal of or tampering with the safety devices constitutes a violation of the OSHA regulations.
ATTENTION: UPSTREAM OF THE COMPRESSOR INSTALL AN ISOLATOR KNIFE-SWITCH WITH AN AUTOMATIC
DISCONNECT AGAINST CURRENT SURGES (SEE WIRING DIAGRAM)
ALL WORK ON THE ELECTRICALS, EVEN IF SLIGHT, MUST BE CARRIED OUT BY PROFESSIONALLY SKILLED
PERSONEL.

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FIG. 2
5.0 DESCRIPTION OF DANGER SIGNALS
6.0 DANGER ZONES
FIG. 3
Risks present on the whole compressor
(1)
(2)
(8)
(4)
(7)
(1)
(1)
(1)
8) FLUID EJECTION
5) HIGH PRESSURE
1) DANGER
This symbol identifies life threatening electrical voltage
levels which will result in severe personal injury or
death. All electrical work must be performed by a
qualified electrician
6) CAUTION
This symbol identifies hot surfaces which
could result in personal injury or property
damage.
2) DANGER
A
ir from this compressor will cause severe injury or
death if used for breathing or food processing. Air used
for these process must meet OSHA29CFR1910 OR
FDA21XDE178.3570 regulations
7) DANGER
This symbol identifies immediate hazards
which will result in severe personal injury,
death or substantial property damage.
3) NOISE
4) FAN ROTATING
9) COMPRESSOR WITH
AUTOMATIC START
10) WARNING
Identifies hazards or unsafe practices which
could result in minor personal injury or
property damage.

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7.0 SAFETY DEVICES
1) Safety screws
2) Side guard and electrical panel door can be opened using a special key.
3) Fixed protection device - pulleys
4) Emergency stop button
5) Oil filling cap (with safety breather)
6) Safety valve (pressure relief valve)
8.0 POSITION OF LABELS
8.1 POSITION OF THE DANGER LABELS
The labels fitted on the compressor unit are part of the compressor; they have been applied for safety purposes and must
not be removed or spoiled for any reason.
1) Dangers label Code D09688 6) Moving parts
2) Label “Compressor with automatic start” 7) Dangerous electric voltage
3) Air not fit for breathing 8) Hazard Label (atmospheric events)
5) No lifting label
FIG. 4
FIG. 5
12
3
4
5
6
2
D51089
5
1
2
3
66
7
8
1

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8.2 POSITION OF THE DATA LABELS
1) Identification label 5) Oil label
2) Maintenance schedule 6) Draining condensate
3) Direction of rotation label 7) Electric cable label
4) Air not fit for breathing
FIG. 6
7
D51258
4
Oil
Label
5
2
6
D04289
3
610109

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9.0 COMPRESSOR ROOM
9.1 FLOOR
The floor must be even and of industrial type.
Consider the total weight of the compressor when positioning it.
9.2 VENTILATION
When the compressor is operating, the room temperature must not be higher than 104 °F or lower than 36 °F.
If the environment is dusty it is advisable to fit a filtering panel on this opening.
The hot air ejected by the compressor may be led outside with a pipe.
This pipe must have a minimum section of 35.3 sqft and it must not be longer than 9.8 ft.
For longer pipes an extra fan must be fitted.
9.3 EXAMPLES OF VENTILATION OF THE COMPRESSOR ROOM
FIG. 7
FAN AIR OUTPUT
HOT AIR EJECTION
A
TTENTION: REMOVABLE PIPE TO
A
LLOW CLEANING OF THE
COOLER
HOT AIR PIPE

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10.0 TRANSPORT AND HANDLING
ATTENTION: the compressor must only be moved with the panels fitted (fig. 8)
The compressor must be transported as shown in the following figures.
FIG. 8
CPC 40
–
50 - 60
WOODEN PROTECTION
A
VOID DAMAGING THE
CABINET

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11.0 UNPACKING
After removing the packing, ensure that the compressor is unbroken and that there are no visibly damaged parts. If you
are unsure, do not use the compressor but request assistance from your local CP distributor. The packing material
(plastic bags, polystyrene foam, nails, screws, wood, metal strapping, etc.) must be disposed of appropriately.
12.0 INSTALLATION
ANY DAMAGE DUE TO FAILURE TO OBSERVE THE PRECAUTIONS GIVEN BELOW CANNOT BE ATTRIBUTED
TO THE MANUFACTURER AND MAY RESULT IN WARRANTY DENIAL.
12.1 POSITIONING
After unpacking the equipment and preparing the compressor room, put the compressor into position, checking the
following items:
•ensure that there is sufficient space around the compressor to allow maintenance (see Fig. 10).
•check the compressor is standing on a perfectly flat floor.
FIG. 10
15001500
1
2
3

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ENSURE THAT THE OPERATOR CAN SEE THE WHOLE COMPRESSOR FROM THE CONTROL PANEL AND
CHECK THE PRESENCE OF ANY UNAUTHORIZED PERSONS IN THE VICINITY OF THE COMPRESSOR.
12.2 ELECTRICAL CONNECTION
COMPRESSOR WITH AUTOMATIC START
•Check that the supply voltage is the same as the value indicated on the compressor data label.
•Check the condition of the electrical leads and ensure that there is a grounded lead.
•Ensure that there is an automatic disconnect device upstream for the compressor against surges, (see Ref. 3 Fig. 10).
•Connect the compressor power cables with the greatest care, according to the applicable standards. These cables
must be as indicated on the compressor wiring diagram.
•After the first 50 working hours, check that the screws on the electric terminals are tight.
ONLY PROFESSIONALLY SKILLED PERSONNEL SHOULD HAVE ACCESS TO THE ELECTRIC PANEL. SWITCH
OFF THE POWER BEFORE OPENING THE DOOR OF THE ELECTRIC PANEL.
COMPLIANCE WITH THE APPLICABLE REGULATIONS CONCERNING THE ELECTRICALS IS FUNDAMENTAL
FOR OPERATOR SAFETY AND FOR THE PROTECTION OF THE COMPRESSOR
CABLES, PLUGS AND ALL OTHER TYPE OF ELECTRIC MATERIAL USED FOR THE CONNECTIONS MUST BE
SUITABLE FOR THE USE AND COMPLY WITH THE REQUIREMENTS STATED BY THE APPLICABLE
REGULATIONS.
12.3 CONNECTION TO THE COMPRESSED AIR NETWORK
Fit a bypass valve Ref. 1 Fig. 10 between the compressor and the compressed air network so that the compressor may
be isolated during maintenance operations.
Condensate must be drained from the oil receiver (manually) Ref. 2 Fig. 10, in accordance with the local regulations.
PIPES, FITTINGS AND CONNECTIONS USED TO INSTALL THE COMPRESSOR MUST COMPLY WITH LOCAL
REGULATIONS.
ANY DAMAGE DUE TO FAILURE TO OBSERVE THE PRECAUTIONS GIVEN BELOW CANNOT BE ATTRIBUTED
TO THE MANUFACTURER AND MAY RESULT IN WARRANTY DENIAL.
12.4 STARTING UP
See part B of this manual, Section 20.0

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13.0 DIMENSIONSAL DRAWING
ELECTRICAL
ENTRY
(A)
Air delivery (A)
HP 40-50 HP 60
1” ¼ NPT 1” ½ NPT

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14.0 COMPRESSOR ILLUSTRATION
14.1 GENERAL LAY-OUT
1 Air suction filter
2 Thermostatic valve
3 Oil filter
4 Air-oil cooler
5 Filter panel
6 Belt tightening system
7 Minimum pressure valve
8 Air-oil separator ( inside the SUMP TANK)
9 Top-up or oil filling cap
10 Control panel
11 Oil gauge
12 Oil discharge
13 SUMP TANK
14 Pressure gauge tank
15 Control card
16 Safety valve
17 Emergency stop button
18 Electric motor
19 Screw compressor
20 Suction unit
22 Electrical fan
✳IT IS FORBIDDEN TO TAMPER WITH THE SETTINGS OF THE SAFETY VALVE
FIG. 11
713
4
22
18
6
20
17
15
10
1
3
19
2
12
11
9
5
8
16
14

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14.2 CONTROL PANEL
BEFORE OPERATING, CAREFULLY READ AND UNDERSTAND THE COMMAND FUNCTIONS.
1) Control panel
2) Emergency stop button
FIG. 12
1

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14.3 ES 3000 CONTROLLER
There is an electronic control and diagnostics display on the electric panel ; this display includes the following functions
as shown in figure 13.
1) Top display: indicates the compressor pressure.
2) Bottom display: indicates the temperature, total hours, loaded hours.
3) Button to create a vacuum in the compressor.
4) Navigate to the next field of the screen on the display Ref. 2
5) Buttons to program the controller.
Symbol Description
Pressing the button cancels the stored alarm indication. Pressing the button for more than
3 seconds, the central control unit is tested: all the LEDs must be on.
By pressing this button the compressor is switched on. There is a delay of about 15
seconds before start up.
Pressing the pushbutton starts the compressor shut down phase: The compressor runs
unloaded for a few seconds before stopping.
FIG. 13
(7)
(6)
(5)
3
2
1
4
5

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LED - indicates compressor operating status: “RED” pilot lamps (cause compressor stoppage)
Symbol LED flashing LED on
Overpressure alarm in progress Compressor stopped for overpressure
Wrong rotary way : in progress Wrong rotary way
Oil over temperature alarm in progress
(>203 °F) Compressor stopped for oil over temperature (> 212
°F)
Fan motor overload alarm
Compressor lock out due to fan motor overload
Motor temperature alarm in progress Compressor stopped for motor cool down
General alarm in progress for fault in
pressure or temperature probes. -
To switch off the red LEDs press “reset”
LED - indicates compressor operating status: “YELLOW” pilot lamps (do not cause compressor stoppage).
Symbol LED flashing LED on
Not enabled
Not enabled
Warning to replace oil filter Replace oil filter
Warning to replace separator filter Replace separator filter
Warning to replace air filter Replace air filter
Warning to change oil Change oil
Warning for general check Perform general check
To switch off the “YELLOW” LEDs see section 14.6
LED - indicates compressor operating status: “GREEN” pilot lamps
Symbol LED flashing LED on
Not enabled Not enabled
-
Compressor running under load
Manual unloaded operation of compressor Unloaded operation of compressor
Compressor in stand-by for start-up
(15 seconds) or in shut-down phase
(30 seconds).
Compressor on
(G)
(A)
(E)
(P)
(O)
(R)
(Q)
(F)
(C)
(D)
(B)
(H)
(I)
(L)
(M)
(N)

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ATTENTION: to start up again after a protection has been triggered (alarm) press “RESET”
followed by the start button “I” (6)
OPERATION OF THE CONTROLLER
The controller is programmed for Energy Saving; it switches off the compressor, thus reducing idle running to a minimum.
The controller is preset to run idle before switching off for a period that is shorter the lower the consumption of air.
The controller also indicates when filters require maintenance etc.. (Yellow LEDs).
14.4 VIEWING THE HOURS OF OPERATION
To view the total hours of operation press Ref. 3, Fig. 13a, the hours of operation appear in the bottom display and a dot
lights up in the top display (confirm LED).
To view the LOADED hours of operation press Ref. 3 Fig. 13a again and a dot lights up on the right side of the top
display (confirm LED).
14.5 VIEWING THE HOURS OF OPERATION OF COMPONENTS SUBJECT TO MAINTENANCE
To view the hours of operation of individual components subject to maintenance, proceed according to Section 14.6, to
point 4; the operating hours will be viewed on the bottom display.
- Press the button Ref. 3 Fig 13a to exit.
14. 6 RESETTING THE MAINTENANCE INTERVAL COUNTERS (YELLOW LEDs excluding LED “A”)
To reset a counter (i.e. Ref. L air filter) after having performed the relevant maintenance, proceed as follows: (see Fig.
13a)
1) Press buttons Ref. 7 and Ref. 4 simultaneously until the LED ref. H lights up.
2) Release the buttons Ref. 7 and Ref. 4
3) Use the buttons Ref. 1 and Ref. 2 to select the LED Ref. L (air filter) relevant to the component in question.
4) The operating hours of the component Ref. L (air filter) are viewed on the 5-digit bottom display.
5) Press the button Ref. 4 once and the value viewed flashes, press the button Ref. 4 again; the display is now reset and
the LED Ref. L is lit.
6) Press the button Ref. 3 to exit from RESET
7) To reset another component, move to the relevant LED using the buttons Ref. 1 and Ref. 2.
The board exits automatically from programming after 30 seconds of inactivity
14.7 ACTIVATING / DEACTIVATING THE LOAD-UNLOAD OPERATION MODE
1) Press the button Ref. 1 Fig. 13a and the LED Ref. Q flashes, the compressor operates in MANUAL UNLOAD mode.
2) Press the button Ref. 1 Fig. 13a again and the compressor returns to the automatic cycle.
FIG. 13a
H
7
L
Q
1
2
3
4
5
6

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14.8 OPERATING PARAMETERS OF THE CONTROLLER.
The controller is programmed in the factory with the following parameters:
P0 = cut-off pressure (107 – 132 – 157 – 182 PSIG)
P1 = cut-in pressure (85 – 110 – 135 – 160 PSIG)
r 2 = maximum operating temperature (212 °F)
t 3 = not active
t 4 = not active
C5 = maximum number of start-ups per hour (10)
The controller is also programmed to measure the pressure in “PSI” (parameter C7) and the temperature in °F
(parameter C6).
The pressure and temperature units of measurement correspond to the table below.
Name of the parameter Value of the parameter
C6 0 = °C 1 = °F
C7 0 = bar 1 = °PSI
All parameters described above can be viewed and modified with the procedure indicated in Section 14.9.
The parameter number appears in the top display and the value of the parameter appears in the bottom display.
14.9 VIEWING AND MODIFYING THE VALUE OF PARAMETERS.
To view the parameters proceed as follows:
- Press and hold the button 4 Fig. 13a for a few seconds, until “P0” (cut-off pressure) appears on the top display: the
value of the cut-off pressure in PSI (107 – 132 – 157 – 182 PSIG) appears simultaneously on the bottom display.
- By pressing the button Ref. 1 Fig. 13a all the board parameters (P0, P1, r2, t3, t4, C5, C6, C7) will appear in sequence
on the top display while the values set for each parameter will appear on the bottom display. To exit press the button
Ref. 3 until the luminous dot on the display is positioned on the symbol.
To change the value of parameters follow the example indicated below:
EXAMPLE: the maximum temperature value is to be modified to 203°F.
- Press and hold the button Ref. 4 fig. 13a for a few seconds, until the parameter “P0” appears on the top display.
- Press the button Ref. 1 Fig. 13a until reaching the parameter “r2” (maximum temperature).
- Press the button Ref. 4 Fig. 13a: the value of the temperature indicated on the bottom display flashes.
- Press the button Ref. 2 Fig. 13a until reaching the value 203.
- Press the button Ref. 4 Fig. 13a to confirm the modification; the value 203 stops flashing.
- Exit from programming by pressing the button Ref. 3 Fig. 13a.
The new maximum temperature value is now 203.
14.10 DISPLAYING A TEMPERATURE LEVEL THAT IS TOO LOW
The controller is programmed in the factory with a minimum temperature level set at (+ 36 °F), if the temperature sensed
is lower, it is shown by the bottom display flashing. This fault signal does not mean the compressor cannot be started, but
warns the operator that the room temperature is too low.

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15.0 ROUTINE MAINTENANCE
BEFORE CARRYING OUT ANY MAINTENANCE IT IS MANDATORY TO STOP THE COMPRESSOR AND
DISCONNECT IT FROM THE MAIN POWER.
The maintenance jobs described in this Section may be carried out by the user.
The more complex maintenance jobs which require professionally skilled personnel are listed in the Section on
GENERAL MAINTENANCE FOR TRAINED PERSONNEL (See Section. 21.0)
15.1 GENERAL INFORMATION
Routine maintenance must be carried out according to the maintenance schedule affixed to the compressor.
15.2 MAINTENANCE SCHEDULE
OPERATIONS THAT MAY BE CARRIED OUT BY THE USER
 OPERATIONS THAT REQUIRE SKILLED PERSONNEL; THESE OPERATIONS ARE ILLUSTRATED IN PART
“B” OF THIS MANUAL.
These maintenance intervals are recommended for work environments that are not dusty and are will ventilated.
For particularly dusty environments, double the frequency of maintenance.
Every 50 working hours Drain condensate from the SUMP TANK
Check the oil level
Clean the filtering panel
Every 500 hours Clean the air suction filter (see control board LED)
Check belt tension
Every 2000 hours Change the oil filter (see control board LED)
Change the suction filter (see control board LED)
Every 4000 hours Clean the finned surface of the air-oil cooler
Change the oil separating filter (see control board LED)
Every 8000 hours Change the oil (see control board LED)
BEFORE CARRYING OUT ANY MAINTENANCE IT IS MANDATORY TO STOP THE COMPRESSOR AND
DISCONNECT IT FROM THE MAIN POWER.
MAINTENANCE ON THE ELECTRICAL COMPONENTS CAN ONLY BE PERFORMED BY QUALIFIED
TECHNICIANS OR AUTHORIZED FACTORY PERSONNEL.
CAUTION
When the compressed air cools, part of the moisture sucked in by the compressor condenses. In order to protect the
dryer against the risk of an ice plug forming, it is essential to check regularly that the condensate drains are operating
properly :
On the compressed air storage reservoir and on the filters :
• With a manual drain, drain regularly according to the moisture content of the ambient air.
• With an automatic drain, set the draining cycle accordingly and check that the drain is in good working condition.
This recommendation is also fundamental in a circuit comprising an absorption dryer (risk of saturation of the
alumina).