Scroll Enclosure Air Compressor
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.
Powerex • 150 Production Drive • Harrison, OH 45030 • USA
1-888-769-7979
IN558804AV 6/12
Specifi cations
Product SED, SET, SEQ, SEH and SEO Series
Performance
Specifi cations
See Page 2
Lubrication Grease-fi lled Bearings / Dry Scroll
Operating Voltages 3Ø 208-230/460 Volts, 60 Hz
Compression Cycle Scroll
Motor Overload
Protection
IEC Motor Overload Relay
Pressure Settings
Working Pressure
Cut-In: 94 psig Cut-Out: 116 psig
Cut-In: 116 psig Cut-Out: 145 psig
(High Pressure Unit)
Overpressure
Protection
Safety Valve Factory Set and Sealed
Outlet Air
Connections
See Page 2
Minimum
Recommended Tank
Sizes
See Page 5, Chart 2
Unit Isolation Standard All Units
Drive 3V Belt
Control Panel UL508A Listed for medical units
Description
Powerex 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 Powerex Oilless Rotary Scroll Air Compressor has
advanced scroll compressor technology through the
development of a completely oilless unit. The Powerex 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 fi ltration,
or inlet valves are required on the Powerex Scroll unit. The
compressor is virtually maintenance free.
The Powerex Oilless 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, fl at 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 fi xed 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
relationship 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 fi xed scroll so no valves are needed.
2
Scroll Enclosure Air Compressors
Performance Specifi cations
Model SED1007 SED1007HP SET1507 SET1507HP SEQ2007 SEQ2007HP SEH3007 SEH3007HP SEO4007 SEO4007HP
Installed Motor
HP 10 10 15 15 20 20 30 30 40 40
Maximum
Pressure PSIG 116 145 116 145 116 145 116 145 116 145
Performance
SCFM @
100 PSIG
30.4 25.6 45.6 38.4 60.8 51.2 91.2 76.8 121.6 102.4
FLA*
208 / 230 / 460
30.6 / 27.6 /
13.8
30.6 / 27.6 /
13.8
45.9 / 41.4 /
20.7
45.9 / 41.4 /
20.7
61.2 / 55.2 /
27.6
61.2 / 55.2 /
27.6
91.8 / 82.8 /
41.4
91.8 / 82.8 /
41.4
122.4 /
100.4 / 55.2
122.4 /
100.4 / 55.2
Noise Level dB(A) 53 53 56 56 58 58 59 59 60 60
Discharge
Connection 3/4 inch 3/4 inch 3/4 inch 3/4 inch 1 inch 1 inch 1-1/2 inch 1-1/2 inch 1-1/2 inch 1-1/2 inch
Dimensions
in Inches
(L x W x H)
38 x 26 x 47 38 x 26 x 47 38 x 26 x 47 38 x 26 x 47 38 x 26 x 61 38 x 26 x 61 58 x 45 x 65 58 x 45 x 65 58 x 45 x 65 58 x 45 x 65
Weight (lbs) 620 620 800 800 1030 1030 1945 1945 2320 2320
Discharge Air
Temp. °F
< Intake
temp.
+49°F
< Intake
temp.
+49°F
< Intake
temp.
+52°F
< Intake
temp.
+52°F
< Intake
temp.
+63°F
< Intake
temp.
+63°F
< Intake
temp.
+63°F
< Intake
temp.
+63°F
< Intake
temp.
+63°F
< Intake
temp.
+63°F
* Full System Amps
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.
Unpacking
After unpacking the unit, inspect carefully for any damage
that may have occurred during transit. Make sure to tighten
fi ttings, 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.
The compressor nameplate should be checked to see if the
unit is the correct model and voltage as ordered.
PRECAUTIONS DURING TRANSPORTATION AND MOVEMENT
TRANSPORTATION BY FORKLIFT
Use openings for forklift under both sides of the unit.
Avoid damaging the panel with
tips of the forklift.
TRANSPORTATION BY CRANE
Use openings at the bottom of the unit to lift up by cable,
lifting straps and etc. Make sure all lifting devices are rated
for the maximum load.
Be sure to use pads in order to
protect panels.
Figure 1
Figure 2
3
Scroll Enclosure Air Compressors
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
fi eld 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.
2. Air used for breathing or food processing must
meet O.S.H.A. 29 C.F.R. 1910.134 or C.F.R. 178.3570
regulations.
Motors, electrical
equipment and
controls can cause electrical arcs that will ignite a
fl ammable gas or vapor. Never operate or repair in
or near a fl ammable gas or vapor. Never store
fl ammable liquids or gases in the vicinity of the compressor.
3. Safety Valves or Relief Valves used on this compressor
must be in accordance with ANSI/ASME B19 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.
Release all pressure
from the system
before attempting to install, service, relocate or
perform any maintenance.
6. 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,
aftercooler, motor, etc.
7. Keep fl ammable gases away from the compressor. Parts
of the compressor become very hot during operation and
the vapors from fl ammable gases may cause the unit to
explode.
8. Never use fl ammable or toxic solvents to clean the
compressor or any of the unit’s parts.
9. Do not remove or tamper with any safety devices,
guards, panels or insulation parts while compressor is in
operation. 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, orifi ce, etc. The
compressor or part of the system could rupture or
explode if a Safety Relief Valve is not installed.
10. 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.
11. Do not service the compressor or any compressor part
while the unit is in operation.
12. 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.
13. All electrical connections should be made by a qualifi ed
electrician.
Disconnect all
power supplies to
the compressor before opening the electrical box
or before servicing the unit. High voltage may be
present.
14. Never remove or alter any safety warning labels, tags,
etc. located on or provided with compressor.
MANUAL
Breathable Air Warning
This compressor / pump is not equipped and should
not be used “as is” to supply breathing quality air. For
any application of air for human consumption, you
must fi t the air compressor / pump with suitable in-line
safety and alarm equipment. This additional equipment
is necessary to properly fi lter and purify the air to
meet minimal specifi cations for Grade D breathing as
described in Compressed Gas Association Commodity
Specifi cation G 7.1 - 1966, OSHA 29 CFR 1910. 134,
and / or Canadian Standards Associations (CSA).
DISCLAIMER OF WARRANTIES
IN THE EVENT THE COMPRESSOR IS USED FOR THE
PURPOSE OF BREATHING AIR APPLICATION AND PROPER
IN-LINE SAFETY AND ALARM EQUIPMENT IS NOT
SIMULTANEOUSLY USED, EXISTING WARRANTIES ARE
VOIDED, AND POWEREX DISCLAIMS ANY LIABILITY
WHATSOEVER FOR ANY LOSS, PERSONAL INJURY OR
DAMAGE.
4
Scroll Enclosure Air Compressors
General Safety Information
(Continued)
15. Always provide a clean air source for your compressor.
Keep all piping direct and short when using an outside
air source.
16. Locate compressor inlet system away from possible
ingestion of fl ammable or toxic vapors, water, dirty air or
air temperatures exceeding 104°F.
17. Never set the pressure to a higher setting than the one
provided from the factory.
18. Check all gauges daily to be sure the compressor is
operating correctly.
19 Follow all directions for maintenance. Check all safety
devices according to instructions.
20. Never attempt to lift or move the compressor except
when using the proper lifting procedures.
21. Make sure all electrical components follow the National
Electric code and all state and local codes when installing
the compressor.
22 Do not operate the compressor if unusual noise or
vibration occurs.
23. Keep all panels in place at all times.
24. Standard motors are not appropriate for dirty, wet or
explosive areas.
25. All service should be performed by trained and qualifi ed
people only.
26. The Drive Belt tension should be checked often during
initial operation of the compressor.
27. Never substitute oil bath or oil wetted fi lters for the inlet
fi lters provided with the compressor.
Installation
INSTALLATION SITE
1. The scroll compressor must be located in a clean, well lit
and well ventilated area. A contaminated area can clog
the intake fi lter and / or intake metal mesh.
2. The area should be free of excessive dust, toxic or
fl ammable gases, moisture and direct sunlight.
3. Never install the compressor where the ambient
temperature is higher than 104°F or lower than 32°F
or where humidity is high. High humidity will cause
electrical short circuit and rusting of components.
4. Clearance must allow for safe, effective inspection and
maintenance. 24 inch of clearance for sides, 40 inch
clearance from the top is recommended.
5. If necessary, use metal shims or leveling pads to level the
compressor. Never use wood to shim the compressor.
VENTILATION
1. If the scroll compressor is located in a totally enclosed
room, an exhaust fan with access to outside air must be
installed.
2. Never restrict the cooling fan exhaust air.
3. Vent the exhaust air outside to prevent the compressor
from operating at high temperatures and shutting down.
4. Never locate the compressor where hot exhaust air from
other heat generating units may be pulled into the unit.
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
capacity value listed in Chart 1.
FRESH
AIR IN
EXHAUST
AIR OUT
FRESH
AIR IN
EXHAUST
AIR OUT 8 inches to
12 inches
Clearance
Setup A Setup B
Figure 3
Model - Setup B 10 HP 15 HP 20 HP 30 HP 40 HP
Ventilation
Capacity (cfm) 885 1415 1770 2830 3535
Model - Setup A 10 HP 15 HP 20 HP 30 HP 40 HP
Ventilation
Capacity (cfm) 2650 3885 5300 7770 10595
Chart 1
5
Scroll Enclosure Air Compressors
Installation (Continued)
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
12 inches for ease of maintenance. Intake section of the
duct should be larger than the dimension of compressor
exhaust shown below:
WIRING
All electrical hook-ups must be performed by a qualifi ed
electrician. Installations must be in accordance with local and
national electrical codes.
1. Use solderless terminals to connect the electric power
source.
2. Remove front panel.
3. Remove the rectangle electrical box cover located
beneath air inlet fi lter on the right front of the unit.
4. 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
PIPING
These units do not include air receivers. An air receiver can
be purchased separately. Please consult our distributors. Use
Chart 2 as a guideline for sizing the air receiver.
1. Make sure the piping is lined up without being strained
or twisted when assembling the piping for the scroll
compressor.
2. Appropriate expansion loops or bends should be installed
at the compressor to avoid stresses caused by changes in
hot and cold conditions.
3. Piping supports should be anchored separately from the
compressor to reduce noise and vibration.
4. Never use any piping smaller than the compressor
connection.
5. Use fl exible hose to connect the outlet of the compressor
to the piping so that the vibration of the compressor
does not transfer to the piping.
SAFETY VALVES
The fl ow capacity of a safety valve should be equal to or
greater than the capacity of the compressor.
1. The pressure setting of the safety valve must not be
greater than the maximum working pressure of the air
receiver.
2. Safety valves should be placed ahead of any possible
blockage point in the system, i.e. shutoff valve.
3. Avoid connecting the safety valve with any tubing or
piping.
4. Manually operate the safety valve every six months to
avoid sticking or freezing.
Model 10 HP 15 HP 20 HP 30 HP 40 HP
Air Receiver Minimum
Capacity (gallons) 30 60 60 110 160
Chart 2
6
Scroll Enclosure Air Compressors
Operation
BEFORE START UP
1. Make sure all safety warnings, labels and instructions
have been read and understood before continuing.
2. Remove any shipping materials, brackets, etc.
3. Confi rm that the electric power source and ground have
been fi rmly connected.
4. Check the belts for tightness.
5. Be sure all pressure connections are tight.
6. Check to be certain all safety relief valves, etc., are
correctly installed.
7. Securely mount all panels and guards.
8. Check that all fuses, circuit breakers, etc., are the proper
size.
9. Make sure the inlet fi lter is properly installed.
10. Confi rm that the drain valve is closed.
11. Visually check the rotation of the compressor pumps.
The rotation should be counterclockwise if viewing the
compressor from the pulley or belt side of the motor or
the air end. If the rotation is incorrect, have a qualifi ed
electrician correct the incomming T1 and T2 connections.
START-UP AND OPERATION
1. Follow all the procedures under “Before start-up” before
attempting operation of the compressor.
2. Switch on the electric source breaker.
3. Make sure electric source lamp lights up and that the
caution code or alarm code does not show up on the
display.
Note: The alarm lamp light will come on if a temperature
sensor is not connected. If the sensor is not connected, have a
qualifi ed service person reconnect the sensor.
4. Open the discharge valve completely.
5. Push ON button and check that the compressor operates
without excessive vibration, unusual noises or leaks.
6. Close the discharge valve completely.
7. If the pressure does not rise on a three phase unit,
turn the unit off, the unit is running backwards.
Have a qualifi ed electrician switch the breaker OFF
and exchange two out of three phases of electric
source.
8. Check the discharge pressure. Also make sure the air
pressure rises to the designated pressure setting by
checking the discharge pressure gauge.
CONTROL LOGIC SEQUENCING ORDER
Since the compressors are designed using multiple air-ends,
they are using multiplex controller. The controller will start
and stop each air-end according to the pressure and air
consumption.
1) Alternating Control:
The controller will equalize the operating hours on
each air-end. It will alternate between the air end with
the most running time and the air end with the lowest
running time.
2) Prevention of long term operation:
When an air-end has been operating longer than the set-
time, the controller will alternate to the air-end with the
lowest running time. This will prevent one air end from
running continuously for too long and will equalize the
running time between the available air ends.
SHUT-DOWN
1. Stop the compressor by pushing the OFF button.
NOTE: If the compressor rotates in reverse for more than fi ve
seconds, the check valve needs to be cleaned or replaced.
2. Switch the breaker OFF if the compressor is not to be
used for a long period of time.
STOPPING THE COMPRESSOR DURING NORMAL
OPERATION
1. Close the discharge valve.
2. Allow the air pressure to build and the compressor to
stop.
3. Turn the compressor off by pushing the OFF button.
STOPPING THE COMPRESSOR DURING EMERGENCY
OPERATION
Stop the compressor by pushing the OFF button or by turning
the power off at the main disconnect panel.
SED SET
1
2
3
1
2
SEQ
4
3
1
2
SEH
3
1
2
(6)3
(4)
1
(5)2
SEO
4
3
1
2
(8)
4
1 (5)
2 (6)
3 (7)
Figure 4 - Control Logic Sequencing Order
7
Scroll Enclosure Air Compressors
Multi-Stage Control
As this compressor uses plural air ends, it employs multi-stage control. It can start and stop each air end according to pressure
and air consumption, automatically select the number of air ends in accordance with air consumption and achieve optimum and
uniform operation at all times as well as energy-saving and labor-saving operation.
1. Multi-stage control
Among air ends which are operating under group control, it stops the air end which has been operating for a longer
time and restarts the air end whose operating time has been shorter, thus resulting in equalization of operating time
of each air end and operation with a min. quantity of air ends in accordance with air consumption and energy-saving
operation by eliminating waste of electricity.
2. Prevention of long-term operation
When operating time of an air end exceeds the initial setting time, it changes operation from that air end to the one
which has stopped, prevents long-term operation of one air end, lengthens the lifetime of air ends and equalizes the
operating time of air ends.
No 1
No 8
No 7
No 6
No 5
No 4
No 3
No 2
Compressor
Multi-stage control
OFF ON
100%
0%
Max
pressure
Min
pressure
Pressure
Ratio of
air consumption
Ration of Load
8
Scroll Enclosure Air Compressors
Operation Mode
Caution Mode
Service Mode
Set Mode
ON OFF
Compressor
Run
Mode Item
Reset
Display
Mode Display Light
Indicates selected
display mode
Reset Switch
Performs various
resettings
Compressor
Operating Lamp
Indicates selected
display mode
ON Switch
Starts the unit
OFF Switch
Stops the unit
ITEM button
Selects the informa-
tion to be displayed
MODE button
Selects the mode
to be displayed
Figure 5 - Operating Panel (SED, SET, and SEQ)
Operation Mode
Time Mode
Set Mode
ON OFF
Compressor
Run
Mode Item
Reset
Display
Mode Display Light
Indicates selected
display mode
Reset Switch
Performs various
resettings
Compressor
Operating Lamp
Indicates selected
display mode
ON Switch
Starts the unit
OFF Switch
Stops the unit
ITEM button
Selects the informa-
tion to be displayed
MODE button
Selects the mode
to be displayed
Unit Display
Indicates selected unit
UNIT 1 UNIT 2
Figure 6 - Operating Panel (SEO and SEH)
Operating Panel
DISPLAY MODE
There are fi ve modes of display: Operation, Caution, Service,
Set, and Time.
1. Operation Mode (Default Mode) - To toggle between
display, push item button. You can obtain operating
information (pressure, hours, operating conditions)
which are useful for daily maintenance and inspection.
It functions whether compressor operates or stops. (See
Charts 3 and 4).
2. Caution Mode - In order to select Caution Mode, push
Mode button so that Caution Mode light is illuminated.
By Item button, you can determine causes and conditions
when problems occur as indicated in Charts 5 and 6. It
functions only when compressor stops (2.5 second delay
before each pump starts).
3. Service Mode - In order to select Service Mode, push
Mode Selector Switch so that Service Mode light is
illuminated. By Item Selector Switch, you can determine
causes and conditions when problems occur, as indicated
in Charts 5 and 7. It functions only when compressor
stops.
4. Set Mode - Push Mode button so that Set Mode light
is illuminated. Item button can show each of the set
contents as shown in Chart 8. It functions only when
compressor stops.
5. Time Mode (Only STO and SEH) - In order to select the
Time Mode, push Mode Button so that Time Mode light
is illuminated. By utilizing Item Button, you can scroll the
display shown in the chart below. Compressor must be
turned off before selecting the Time Mode.
The Early Caution maintenance alarm becomes effective
by installing a Early Caution maintenance connector. By
doing so, the maintenance alarm will be activated at
7800 hours (2000 hours earlier than maintenance
alarm 1).
CHANGING MINIMUM AND MAXIMUM PRESSURE
SETTING
1. Change to Set Mode by utilizing Mode button.
2. Display maximum pressure or minimum pressure by
utilizing Item button.
3. You can decrease set pressure by pushing OFF button and
Item button at the same time.
4. You can increase set pressure by pushing Off button and
Mode button at the same time.
5. Cut off circuit breaker and switch on breaker again.
Restrictions:
• Maximum pressure does not exceed fi gure initially set at
our plant.
• Pressure difference between maximum and minimum
pressure is 14.5 psig or over.
• Minimum pressure is 29 psig.
• The display will round all pressure increments to the
nearest psi.
RESETTING OF MAINTENANCE COUNTERS
1. Change to “Set Mode” by utilizing Mode button.
2. Display “Maintenance Time 1” by utilizing Item Switch.
3. Press Reset Switch.
4. Cut off circuit breaker and switch on breaker again.
9
Scroll Enclosure Air Compressors
Items Display Explanation
Pressure Displays compressor outlet pressure in psig
(Display on the left means 68 psig.)
Operating
Time
Displays operating time in hours x10.
(Display on the left means 230 hours.)
* Number of Hours that any pump is running x load factor
(between 0 to 1 depending on how many pumps are running)
Operating
conditions
Displays operating condition of of air ends No. 1-4
Displays operating condition of air ends No. 1,2,3 and 4 from left to right of the display
(The air end that are located on the bottom of the Unit is designated as No 1)
In the above example, No. 1 and No. 3 air ends are in operation, No.2 air end is in an
emergency stop and No. 4 air end is off.
If the unit has no air end to display, the indicator will always display “underline”.
Operating
condition of
Unit No. 1
(SEO and
SEH series)
Displays operating condition of present Unit No. 1 (left side) which consists of air ends
no. 1~4.
Display contents are the same as illustrated above.
Operating
condition of
Unit No. 2
(SEO and
SEH series)
Displays operating condition of present Unit No. 2 (right side) which consists of air ends
no. 1~4.
Display contents are the same as illustrated above.
Chart 3 - Operation Mode
●
means specifi c air
end in operation
Compressor is off when
“underline” lights up
Indicates emergency stop
when “hyphen” lights up.
Operating Panel (Continued)
Operation Mode Operating Situation
dX10 Initial stage of stop
dX11 Normal stop
dX12 Dryer preliminary start-up
dX20 Initial stage of start
dX21 Start 1
dX22 Start 2
dX30 Initial stage of load
dX31 Normal load
Chart 4 - Detail of Operating Mode X: Air end No.
10
Scroll Enclosure Air Compressors
Caution Mode Description
CX 5 Failure of dryer (only available for unit
with dryer option)
CX21 High Temperature of air end
CX22 Failure of temperature sensor
CX42 Caution of low pressure (option)
C 91 Maintenance time 1: Intermediate
inspection and maintenance.
Refer to page 9.
C 92 Maintenance time 2: Intermediate
inspection and maintenance.
Refer to page 9. Only SEH and SEO series.
Chart 6 - Caution Code X: Air end No.
Items Display Explanation
Emergency
Code Number
Shows causes for emergency code numbers.
(Refer to Chart 7 regarding details.)
Pressure Shows Pressure in psig when emergency stops occur.
(Display means 78 psig.)
Temperature
Shows Temperature of air end in °C when emergency stops occur. (This display means 58°C.)
When air end temperature is less than 15°C or other failure like cut of temperature sensor
occurs, displays.
Operating
Time
Shows Operating Time in x 10 hours when emergency stops occur. (This display means
230 hours.)
Operating
Mode
Shows Operating Mode in number when emergency stops occur. (Refer to Chart 9 for
Operating Mode.)
Chart 5 - Caution and Service Mode
Operating Panel (Continued)
Service Code Description
EX21 Sudden temperature rise of air end
EX22 High temperature of air end
EX32 High current
EX41 Abnormally high pressure (Only SEH and
SEO series)
EX60
EX61
EX63
Communication failure (Only SEH and SEO
series)
E91 Maintenance time 1: Intermediate
inspection and maintenance.
Refer to page 9.
E92 Maintenance time 2: Intermediate
inspection and maintenance.
Refer to page 9. (Only SEH and SEO series)
Chart 7 - Service Code Number X: Air end No.
11
Scroll Enclosure Air Compressors
Items Display Explanation
Maximum
Pressure
Shows Max. Set Pressure in psig.
(This display means 116 psig.)*
Minimum
Pressure
Shows Min. Set Pressure in psig.
(This display means 93 psig.)
Time to
change
Operating Air
End
Shows Time to Change Operating Air End and prevents the same air end from operating
for a long time. 1 on display means 15 minutes. (This display means 2 x 15 minutes - 30
minutes.)
External
Operation
means that external operation is set.
means that external operation is canceled.
(When either displays, it can be changed by pushing reset switch.)
External
Output
Shows set situation of external output.
displays when emergency stop occurs.
displays when emergency stop or caution occurs.
(When either displays, it can be changed by pushing reset switch.)
Maintenance
Time 1
Shows remaining time until intermediate maintenance and inspection in terms of 10
hours. The fi rst fi gure is 980 (480 for high pressure models) and decreases as operating
time becomes longer.
Group
Control
Shows set situation of Group Control.
means that Group Control mode OFF is set.
means that Group Control mode ON is set.
* If Group control mode ON is set, ON/ OFF button does not work.
(When either displays, it can be changed by pushing reset switch.)
Chart 8 - Set Mode
Operating Panel (Continued)
Items Display Explanation
Maintenance
time 1
Shows remaining time until next maintenance and inspection in x10 hrs. (calculated in
the same fashion with operating time).
It will start at 980 (9800 hrs.) and continue to decrease as the unit is being operated.
Maintenance
time 2
Standard unit does not have this function.
Becomes effective when Early Caution maintenance connector is used (see page 10).
Shows remaining time until scheduled maintenance and inspection.
Running time Running time records the number of hours during which any or the pump on the system
is running (This display means 860 operating hours).
Chart 9 - Time Mode
12
Scroll Enclosure Air Compressors
Operating Panel (Continued)
POWER OUTAGE RESET CONNECTOR (SEH AND SEO
SERIES ONLY)
(Shipped with compressor as an accessory)
You can install the power outage reset connector (auto restart
connector) to this compressor. When you install this connector,
the compressor will automatically start again, after the power
to the control panel is restored (without this connector, you
have to manually push the start button to activate the unit).
When power outage reset
connector is installed on
the system, be sure to push stop switch before doing the
maintenance to stop compressor and turn off main electric
source. Otherwise the system can start automatically after
main electric source is energized.
INSTALLATION PROCEDURE
• Remove printed circuit board (PCB) cover (PCB is installed
at the backside of operating panel) by removing 4 screws
around this cover (see Figure 7).
• Insert the power outage reset connector into CN11 on
circuit board (see Figure 8).
• Replace the cover of to the PCB case
EARLY CAUTION MAINTENANCE CONNECTOR (SEH AND
SEO SERIES ONLY)
(Shipped with compressor as an accessory)
Early Caution maintenance will provide an early alarm for
maintenance schedule. By installing this connector, the
caution alarm for maintenance of one unit will be activated
2,000 hours earlier than the standard maintenance schedule.
This will allow you to spread the cost of maintenance over
period of times. Another alarm will activated at 9,800 hours.
INSTALLATION PROCEDURE
In the same way as stated in the above to install power
outage reset connector, insert attached the Early Caution
maintenance connector into CN26 on circuit board.
Caution Troubleshooting Guide
When caution occurs, caution number fl ashes on the display
section of operating panel and on each Unit operating panel
(compressor does not stop). When the cause of caution goes
away, the light will stop fl ashing. You can check caution
information by going to Caution Display Mode.
When caution occurs, cut off circuit breaker, solve problem
and then turn on electric source again. Caution display will be
reset.
CX21: Temperature of air end is high - When the
temperature of air end becomes high, CX 21 will be
displayed. See Chart 10.
CX22: Failure on temperature sensor - See Chart 11.
C 91 &
C 92: Intermediate Maintenance and Inspection - It
shows that maintenance time (remaining time to
intermediate maintenance and inspection) is 0.
Refer to Set Mode on page 8 for details. It is time
for grease up, replacement of tip seal, etc. Contact
our distributor and ask them to do intermediate
maintenance and inspection.
Main print
board
Front side
Print
board
case
Relay
print
board
Transformer
Rubber bush
Print board
cover
Figure 7 - Circuit Board
Figure 8 - Circuit Board
Main print board
CN26
CN11
Early Caution
maintenance
connector
Power outage
reset
connector
13
Scroll Enclosure Air Compressors
Item Causes
Sensor 1. Temperature sensor cords are not
properly connected
2. Temperature sensor cords are cut
3. Defective temperature sensor
Ambient
Temperature
When it is less than about 32°F
Chart 11 - Troubleshooting Guide: CX22 X: Air end No.
Item Causes
Ambient
temperature
Ambient temperature is high
Failure of
cooling
1. Air inlet is clogged
2. Air outlet is clogged.
3. Dirty aftercooler fi ns.
4. Failure of ventilation fan, damaged intake
hose.
5. High exhaust pressure.
Chart 12 - Troubleshooting Guide: EX21
and EX22 X: Air end No.
Item Causes
Electric source Open phase of R or T phases, low voltage
Air end Failure
Electric motor Failure
Chart 13 - Troubleshooting Guide: EX31
and EX32 X: Air end No.
Emergency Troubleshooting
Guide
In case of emergency stop, emergency (alarm) code shown
in Chart 7 fl ashes on display section and the associated
compressor (air end) will stop. The normal air end with no
problem continues to operate. You can check the emergency
information by going to Emergency Display Mode.
In case of Emergency Stop, study the information, fi nd the
cause and take necessary measures. Then push Reset Switch
on operating panel to cancel fl ashing emergency number.
If you cannot fi nd a reason or remedy, consult with our
technical service team or our service centers.
EX21: Sudden temperature rise of air end
EX22: Temperature rise of air end; If the temperature rises
more than set temperature, compressor (air end)
stops. See Chart 12.
EX32: Rise of current; If current becomes very high, EX32
displays and compressor stops. See Chart 13.
EX41: Emergency stop by high pressure; When pressure is
higher than cut-out pressure by 15 psig, E41 displays
and compressor stops. (Only SEH and SEO series)
EX60,
EX61, &
EX63: Communications failure between the main panel
circuit board and circuit board on each Unit. See
Chart 14. (Only SEH and SEO series)
E 91 &
E 92: Intermediate maintenance and inspection is over -
If you do not conduct intermediate maintenance
when your compressor reaches its time and continue
operation for a further 200 hours with C 91 and
C 92 not canceled, and stop operation; E 91 and
E 92 will display when you switch on circuit breaker
again.
When E 91 and/or E 92 displays, contact our
distributor and ask them to do the intermediate
maintenance and cancel E 91 and/or E 92.
As a temporary measure, you can continue operation
by pushing reset switch, but the manufacturer is not
responsible for any failure or problem after E 91 and
E 92 displays.
When E 91 or E 92 displays,
contact our distributor and do
the intermediate maintenance and inspection soon.
Item Causes
Ambient
temperature
Ambient temperature is high
Failure of
cooling
1. Unit intake wire screen is clogged
2. Exhaust outlet is clogged.
3. Dirty aftercooler fi ns.
4. Ventilation fan fails or intake hose is
damaged.
5. Cooling passage of compressor is clogged
6. High exhaust pressure.
Chart 10 - Troubleshooting Guide: CX21 X: Air end No.
Item Causes
Wiring Failure of connections
Circuit Board Failure
Chart 14 - Troubleshooting Guide: EX60,
EX61, and EX63 X: Air end No.
14
Scroll Enclosure Air Compressors
Troubleshooting Guide
Items marked by ▲ are diffi cult for you to remedy. Please contact our distributor.
Problems Possible Cause(s) Corrective Action
Compressor does not operate
No display on the
operating panel
• Electric source is not turned on
• Fuse on the circuit board was blown
• Electric source is not correctly connected
• Failure of circuit board
• Turn on electric source
• Replace
• Connect correctly
• Inspect, repair or replace ▲
It does not operate
despite displays
• Failure or wiring failure of magnetic starter
• Circuit board failure
• Motor failure
• Low voltage
• Inspect, repair or replace ▲
• Inspect, repair or replace ▲
• Inspect, repair or replace ▲
• Check electric source capacity and the size of
electric source cable and change to proper one
E60, E61 or E63 are
displayed
• Communication failure of circuit board
between operating panel and each Unit
operating panel
• Inspect wiring around communications circuit
board
• Replace circuit board
E91 or E92 are
displayed • Scheduled maintenance time has elapsed • After maintenance, push reset switch to cancel ▲
Err is displayed • Failure of circuit board • Disengage and reengage the circuit breaker
• Replace circuit board*
It starts but then stops
E21 or E22 are
displayed
• High ambient temperature or bad
ventilation
• Clogging of aftercooler fi ns or intake wire
screen
• Failure of ventilating fan
• Damage to intake hose
• Cooling passage of air end clogs
• High exhaust pressure
• Improve installation environment and ventilation
• Clean
• Replace
• Replace
• Inspect
• Inspect
E32 is displayed
• Low voltage
• Motor failure
• Air end failure
• Loosened wiring screw
• High exhaust pressure
• Failure of thermal overload
• Check electric source capacity, size of electric source
cable and change to proper on
• Inspect, repair or replace ▲
• Inspect, repair or replace ▲
• Tighten
• Readjust
• Replace ▲
E41 is displayed • High exhaust pressure
• Failure of pressure sensor
• Check pressure
• Replace pressure sensor
Exhaust pressure does
not increase.
• Air leaks from exhaust piping
• Air-end rotates backward
• Wrong pressure setting
• Clogged intake fi lter
• Inspect, repair
• Change phases
• Readjust ▲
• clean or replace
Safety valve activates. • Failure of safety valve
• Failure of pressure setting
• Replace ▲
• Readjust ▲
Abnormal sound
• Air-end rotates backward
• Air end failure
• Belt slips
• Motor failure
• Cooling fan contacted
• Loosened bolts
• Change phases
• Inspect, repair or replace ▲
• Check tension and readjust
• Inspect, repair or replace ▲
• Inspect and repair
• Inspect and tighten
15
Scroll Enclosure Air Compressors
(A) Load Specifi cations
Panel Part
Number
Motor
Size (HP)
(A) Power
(V/PH)
(A) motor Load
Each (FLA)
Panel Load
Total (FLA)
SED100720E
SED100720EHP
SED100730E
SED100730EHP
SED100740E
SED100740EHP
5
5
5
5
5
5
208V/3
208V/3
230V/3
230V/3
460V/3
460V/3
16.7
16.7
15.2
15.2
7.6
7.6
35
35
32
32
17
17
SET150720E
SET150720EHP
SET150730E
SET150730EHP
SET150740E
SET150740EHP
5
5
5
5
5
5
208V/3
208V/3
230V/3
230V/3
460V/3
460V/3
16.7
16.7
15.2
15.2
7.6
7.6
52
52
48
48
25
25
SEQ200720E
SEQ200720EHP
SEQ200730E
SEQ200730EHP
SEQ200740E
SEQ200740EHP
5
5
5
5
5
5
208V/3
208V/3
230V/3
230V/3
460V/3
460V/3
16.7
16.7
15.2
15.2
7.6
7.6
69
69
63
63
32
32
SEH300720B
SEH300720BHP
SEH300730B
SEH300730BHP
SEH300740B
SEH300740BHP
5
5
5
5
5
5
208V/3
208V/3
230V/3
230V/3
460V/3
460V/3
16.7
16.7
15.2
15.2
7.6
7.6
100
100
91
91
47
47
SEO400720B
SEO400720BHP
SEO400730B
SEO400730BHP
SEO400740B
SEO400740BHP
5
5
5
5
5
5
208V/3
208V/3
230V/3
230V/3
460V/3
460V/3
16.7
16.7
15.2
15.2
7.6
7.6
134
134
121
121
61
61
Branch Circuit Protection Table
(B) Branch circuit protection -
provided by installer
Non-time
Delay Fuse
Time Delay
Fuse
Inverse Time
Circuit Breaker
70A
70A
60A
60A
30A
30A
45A
45A
45A
45A
20A
20A
60A
60A
50A
50A
30A
30A
90A
90A
75A
75A
40A
40A
60A
60A
60A
60A
30A
30A
80A
80A
70A
70A
35A
35A
100A
100A
90A
90A
45A
45A
80A
80A
70A
70A
40A
40A
100A
100A
90A
90A
45A
45A
135A
135A
125A
125A
60A
60A
120A
120A
110A
110A
55A
55A
125A
125A
125A
125A
60A
60A
175A
175A
175A
175A
80A
80A
150A
150A
150A
150A
70A
70A
175A
175A
175A
175A
80A
80A
16
Scroll Enclosure Air Compressors
Scheduled Maintenance
Per OSHA regulations, lockout
compressor system from all
power sources BEFORE performing any maintenance.
INTAKE FILTER
1. Remove the front panel of the unit.
2. Remove the air inlet housing, the wing nut and the inlet
fi lter element.
3. Clean the inlet fi lter element with compressed air or
replace with a new element.
NOTE: Never clean fi lter element with solvents or water.
VENTILATION SCREEN
1. Remove the ventilation screen located at the rear of the unit.
2. Clean with compressed air or soap and water, if necessary.
INSPECT V-BELT TENSION
1. Check V-Belt tension with tension gauge.
2. Adjust to the specifi cations listed in Chart 15.
GREASE COMPRESSOR BEARINGS
1. Remove the plastic dust cap from the airend.
2. Move the compressor pulley until the grease fi tting is
visible through the dust cap hole.
3. Use a grease gun extension adapter to engage the
grease fi tting and supply the proper volume of grease as
indicated on the grease delivery chart. See Chart 16.
GREASE PIN CRANK BEARING (FIGURE 10)
1. Remove the fan duct (2) (Key #6).
2. Remove the nuts and bolts and then the fi xed scroll from
the air end.
3. Grease all three pin crank bearings as indicated on the
grease delivery Chart 14 above.
Use only Powerex genuine
grease (Part # IP600000AV), or
equivalent. Pump grease gun before feeding to eliminate air
from grease passage of the needle adapter.
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.
The grease fi tting, 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 fi tting.
New Belt Load ± Defl ection
Kg/ 10mm
Existing Belt Load ± Defl ection
Kg/ 10mm
6 ± 0.5 5.5 ± 0.5
Chart 15
Model 1st Time 2nd Time
O.S. Bearing 7 times 6 times
Pin Crank Bearing
O.S. Side 7 times 7 times
Chart 16 - Grease Delivery
Figure 10 - Airend: to locate the grease fi tting on the coun-
ter weight, place the key way on the crankshaft as shown.
Key Way
Counter
Weight
Extension
Adapter
Grease Gun
Plastic Dust Cap
Grease Fitting
52°
Grease fi ttings for
pin crank bearings
Figure 9
17
Scroll Enclosure Air Compressors
Scheduled Maintenance
(Continued)
REPLACE TIP SEAL
1. Remove intake hose
2. Remove the discharge hose.
3. Remove nuts and bolts that secure fi xed scroll.
4. Remove the fi xed scroll housing.
5. Take out the old tip seal from the orbiting scroll housing
and fi xed scroll housing, see Figure 11.
6. Remove the old dust seals from fi xed scroll, see Figure 12.
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 opposing
seal cut angels (See NOTE and explanatory diagram below).
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 12.
This is to be done for both FS and OS sets.
Use caution not to tear or distort lip.
1. 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 11 and 12).
2. Insert so that new LP tip seal will contact closely with HP
tip seal inside Scroll Groove.
Insert approxi-mately half of
the LP tip seal and remove the
tip seal to confi rm that a notch in the tip seal has been created.
This will prevent movement during installation (See Figure 8).
3. 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.
4. Insert new backup tube in the FS Scroll in the 6 o’ clock
position (See Figure 13).
Figure 11
Lip Direction Enter
Side
Lip Surface
(Inside)
Lip Side
(Grooved bottom)
Figure 12
Model Size Torque
Pulley bolt M8 175
Housing Nut
(See Figure 1) M10 265
Chart 17 - Bolt Torque (In. - lbs.)
Machined to avoid
movement during
installation
Figure 13
Facing Left Facing Right
Lip
(Bottom Side)
Lip
(Inside)
Fixed Scroll Orbit Scroll
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 fi gure on the right.
18
Scroll Enclosure Air Compressors
Scheduled Maintenance
(Continued)
5. Insert new dust seal on the backup tube (See Figure 14).
6. After replacing tip seal set, reassemble Fixed Scroll set to
the Orbit Scroll. Tighten nuts and bolts temporarily and
confi rm if pump pulley rotates smoothly by hand and
tighten them fi rmly. Tightening torques are:
NOTE: Assemble so that dust seal and tip seal will not drop
between Orbit Scroll set and Fixed Scroll set.
Dust
Seal
Back-up
Tube
Figure 14
Bolt Torque
First Second
17 in lb. 265 in lb.
19
Scroll Enclosure Air Compressors
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 5000 hours or less
Fan Duct Clean ●Every 5000 hours or less
Compressor Fins Clean ●Every 5000 hours or less
Compressor Grease ▲▲
(pump)
Use genuine Powerex 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 ●Confi rm operation
Pressure Sensor Confi rm operation ●
Magnetic Starter Inspect ●Replace if contact points deteriorated
Check valve Inspect ●▲
Confi rm operation by watching pump shut
off
Safety Valve Confi rm 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 5000 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 18
Maintenance Schedule
20
Scroll Enclosure Air Compressors
Electrical Diagram - External Operation and External Output
REMOTE ON / OFF SWITCH INSTRUCTIONS
1. Turn the compressor off and lockout the power to the
compressor per OSHA standards.
2. Remove the top panel from the scroll cabinet to access
the operating panel. Remove the plastic cover from the
backside of the operating panel. Lift the expansion PCB
from the operating panel.
3. Connect an external AC power source of 200 V between
terminals 1 and 2 on the expansion PCB. A switch rated
at least 200 V AC should be used. It is possible to use the
200 V AC source from the transformer on the bottom of
the cabinet.
4. The power wires should run through the right hand side
grommet when facing the front of the control panel. The
left side grommet is reserved for low voltage wires (to
reduce interference).
5. Replace the plastic cover of the operating panel. Replace
the top cover of the scroll compressor.
6. Return the power to the compressor.
7. Set the mode on the display to show external operation
mode (“ECon”).
8. The compressor should now start when external switch is
ON, and turn off when the external switch is OFF.
9. Both the external switch and the control panel controls
will now turn the compressor on and off.
GENERAL FAULT DRY CONTACT CONNECTIONS
1. Turn the compressor off and lockout the power to the
compressor per OSHA standards.
2. Remove the top panel from the scroll cabinet to access
the operating panel. Remove the plastic cover from the
backside of the operating panel. Lift the expansion PCB
from the operating panel.
3. Output wires should be connected between terminals 3
and 4. The dry contacts are normally open; when there
is a fault, the contacts close. The contact rating is as
follows: 200 V AC, 1A, maximum.
4. For larger load devices such as a horn or emergency light,
a relay should be used.
5. The signal wires should run through the right hand side
grommet when facing the front of the control panel. The
left side grommet is reserved for low voltage wires (to
reduce interference).
6. Replace the plastic cover of the operating panel. Replace
the top cover of the scroll compressor.
7. Return the power to the compressor.
8. The external output will now operate when there is
either a caution or emergency. This is the default setting
for the control panel. The external output of the control
panel can be changed to only operate in case of an
emergency.
9. Reasons for Caution and Emergency stop are needed to
confi rm on the control panel display.
Self-holding
switch
AC200V
Electric source
External operation circuit
*See "ECon" in manual
External output circuit
for General Fault
Dry contact
(Normally open)
CN7
CN6
CN3
CN26
CN27
CN5
CN4
TB1
CN29
CN32
CN28
1
2
3
4
EXB
Expansion circuit board
Crimping terminal sizeR1.25-3
CR 1
CN2
CN22
CN31
CN26
CN25
CN24
CN23
CN21
CN20
CN11
CN10
CN1
CN27CN30
1A
CN13
F
DB
Display circuit board
CN1
MB
Main circuit board
Modular plug for
setting and communication
TRANS
CN12
Figure 15
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