Powerex SEH3007, SEH3007HP, SEO4007, SEO4007HP User Manual
Scroll Enclosure Air Compressor 30 HP to 40 HP
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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.
DESCRIPTION
GENERAL
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 Oil-less Rotary Scroll Air Compressor has
advanced scroll compressor technology through the
development of a completely oil-less 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 filtration,
or inlet valves are required on the Powerex Scroll unit. The
compressor is virtually maintenance free.
The Powerex 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
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 fixed scroll so no valves are needed.
Table of Contents
Specifications Pg 1–2 Troubleshooting Pg 14
Safety Guidelines Pg 2-3 Electrical Pg 15-17
Installation Pg 3-7 Parts List Pg 18-19
Operation Pg 7-11 Warranty Pg 23-24
Maintenance Pg 12-13
SPECIFICATIONS
Product SE Series Enclosed Scroll Air
Compressor
Performance
Specifications
Lubrication Grease-filled Bearing
Operating
Voltages
Compression
Cycle
Motor Overload
Protection
Pressure Settings Cut in: 90 psig Cut out: 116 psig
Overpressure
Protection
Outlet Air
Connections
Tank Sizes See Page 6, Chart 3
Drive 3V Belt
Control Panel UL508A Listed
See page 2
3Ø - 208-230/460/575 Volts, 60 Hz;
380 volts, 50 Hz
Scroll
Motor Protector/Circuit Breaker
Cut in: 119 psig Cut out: 145 psig
(High Pressure Units)
Safety Valve Factory Set and Sealed
See page 2
Powerex - 150 Production Drive - Harrison, Ohio 45030 - USA
1-888-769-7979 - www.powerexinc.com
IN590403AV
Pg 1
01/14
30 HP– 40 HP Scroll Enclosure Air Compressors
SPECIFICATION CHART
Model HP Max
Pressure
PSIG
SEH3007 30 116 91.2 208/230/380/460/575 59 1 Inch 67°F
SEH3007HP* 30 145 75 208/230/380/460/575 59 1 Inch 80°F
SEO4007 40 116 121.6 208/230/380/460/575 60 1 Inch 67°F
SEO4007HP* 40 145 100 208/230/380/460/575 60 1 Inch 80°F
*HP indicates high pressure model.
SCFM @
Max
Pressure
Voltage Noise
Level
dB(A)
Discharge
Connection
Discharge
Air
Approach
Temp
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. MAKE SURE EVERYONE OPERATING OR
SERVICING THE COMPRESSOR READS AND
UNDERSTANDS ALL THE INFORMATION PROVIDED.
Danger indicates and
imminently hazardous situation which, if not avoided,
WILL result in death or injury.
Warning indicates a potentially
hazardous situation which, if not avoided, COULD result in
death or serious injury.
Caution indicates a potentially
minor or moderate injury.
Notice indicates important
information, that if not
followed, may cause damage to equipment.
GENERAL SAFETY INFORMATION
Since the air compressor makes up a high pressure system,
the following safety precautions must be observed at all
times.
1. Read all manuals included with this product
carefully. Be thoroughly familiar with the
controls and the proper use of the
equipment.
2. Follow all local electrical and safety codes
as well as in the United States, the National
Electrical Codes (NEC) and Occupational Safety and
Health Act (OSHA).
3. Only persons well acquainted with these rules of safe
operation should be allowed to use the compressor.
4. Keep visitors away and NEVER allow children in the
work area.
Pg 2
5. Wear safety glasses and use hearing
protection when operating the unit.
6. Do not stand on or use the unit as a
handhold.
7. Before each use, inspect compressed
air system and electrical components for signs of
damage, deterioration, weakness or leakage. Repair or
replace defective items before using.
8. Check all fasteners at frequent intervals for proper
tightness.
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 unit.
Never operate compressor pump without a
protective guard. This unit can start
automatically without warning. Personal
injury or property damage could occur
from contact with moving parts.
BREATHABLE AIR
WARNING
This unit 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 fit the air compressor with suitable in-line safety and alarm equipment.
This additional equipment is necessary to properly filter
and purify the air to meet minimal specifications for
Grade D breathing as described in Compressed Gas Association Commodity Specification for Air, OSHA, ANSI
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 SIMUTANEOUSLY USED, EXISTING
WARRANTIES ARE VOID, AND POWEREX
DISCLAIMS ANY LIABILITY WHATSOEVER FOR ANY
LOSS, PERSONAL INJURY OR DAMAGE.
30 HP - 40 HP Scroll Enclosure Air Compressors
GENERAL SAFETY CONT.
9. Do not wear loose clothing or jewelry that will get
caught in the moving parts of the unit.
Surface may be hot even if unit is stopped.
10. Keep fingers away from a running unit;
fast moving and hot parts will cause injury and/or burns.
11. If the equipment should start to vibrate abnormally,
STOP the unit and check immediately for the cause.
Vibration is generally a warning of trouble.
12. To reduce fire hazard, keep unit exterior free of oil,
solvent, or excessive grease.
An ASME code safety relief valve with a setting no higher
than the tank maximum allowable working pressure MUST
be installed in the air lines or in the tank of any compressor.
The ASME safety valve must have sufficient flow and
pressure ratings to protect the pressurized components from
bursting.
13. Never attempt to adjust ASME safety valve on
compressed air units. Keep safety valve free from paint
and other accumulations.
Never attempt to repair or modify a tank!
Welding, drilling or any other modification
will weaken the tank resulting in damage
from rupture or explosion. Always replace worn, cracked
or damaged tanks.
Drain liquid from tank daily.
14. Tanks rust from moisture build-up, which weakens the
tank. Make sure to drain tank regularly and inspect periodically for unsafe conditions such as rust formation and
corrosion.
15. Fast moving air will stir up dust and debris which may
be harmful. Release air slowly when draining moisture
or depressurizing a compressor system.
Do not lift or move unit without
appropriately rated equipment.
Be sure the unit is securely attached to lifting device used.
Do not lift unit by holding on to tubes or coolers. Do not
use unit to lift other attached equipment.
Never use the wood shipping
skids for mounting the unit.
Do not locate the air inlet near
steam, paint spray, sandblast
areas or any other source of contamination.
NOTE: If compressor system is installed in a hot, moist
environment, supply compressor pump with clean, dry
outside air. Pipe supply air in from external sources.
Failure to properly install a tank can lead to
cracks at the welded joints and possible
bursting or leakage.
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.
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 forklift.
INSTALLATION
Disconnect, tag and lock out power source
then release all pressure from the system
before attempting to install, service, relocate
or perform any maintenance.
Pg 3
30 HP - 40 HP Scroll Enclosure Air Compressors
INSTALLATION CONT.
TRANSPORTATION BY CRANE
Use openings at bottom of the unit to lift up by cable, lifting
straps etc. Make sure all lifting devices are rated for the
maximum load.
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 filter and / or intake metal mesh.
INSTALLATION SITE Cont.
2. The area should be free of excessive dust, toxic or
flammable gases, moisture and direct sunlight.
3. Never install the compressor where the ambient
temperature is higher than 104°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.
clearance from the top is required.
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 or the intake
cooling 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.
Be sure to use pads in order to
protect the panels.
A minimum of 24 inches of
clearance for sides, 40 inch
SUGGESTED VENTILATION SYSTEM
The temperature rise in the room must be kept to a maximum
of 10 F. The BTU capacity of the vent system should be sized
for the full operating HP rating of the compressor. Suggested
fan capacity at 0 static pressure is shown below. If static
pressure is higher, the fan capacity should be increased.
An exhaust duct may be installed to capture the warm air
exiting the compressor enclosure. The opening of the exhaust
duct should be about 6 inches larger on each side than the
vent openings on the compressor top panel. The duct should
not obstruct removal of the top panel for service. Leave between 8 and 12 inches of clearance. The CFM capacity of the
exhaust fan should be increased to compensate for duct flow
losses.
Model
Exhaust CFM Required
Figure A Figure B
SEH3007 7770 2830
SEH3007HP 7770 2830
Chart 1
SEO4007 10595 3535
SEO4007HP 10595 3535
Pg 4
30HP - 40HP Scroll Enclosure Air Compressors
INSTALLATION Cont’d
WIRING
All wiring and electrical connections must be performed by
a qualified electrician. Installations must be in accordance
with local and national codes.
Overheating, short circuiting
and fire damage will result from
inadequate wiring.
The Powerex Scroll Enclosure Air Compressor is completely factory wired and requires only a 3 phase supply
circuit. A set of terminals is provided for connection of the
supply conductors and ground conductor. See Figure 3
below for more detail.
Wiring must be installed in accordance with National Electric
Code and local codes and standards that have been set up
covering electrical apparatus and wiring. Consult the codes
and standards and observe local ordinances. Be certain that
adequate wire sizes are used, and that:
1. Service is of adequate ampere rating.
2. The supply line has the same electrical characteristics
3. Ensure the line wire is the proper size and that no other
gives the recommended wire sizes for horsepower of motor
provided.
Recommended wire sizes may be larger than the mini mum
set up by local ordinances. If so, use the large size wire to
prevent excessive line voltage drop.
Chart 2
(voltage cycles and phase) as the motor.
equipment is operated from the same line. The chart
MINIMUM WIRE SIZE
O
USE 75
HP
C COPPER WIRE
Three Phase
208V 230V 460V 575V
30 1 AWG 2 AWG 6 AWG 8 AWG
40 2/0 AWG 1/0 AWG 4 AWG 6 AWG
Figure 3
A 2 inch opening is provided for conduit or cord connection. See Figure 4 for opening location.
Figure 4
The additional wire cost is very small compared with the cost
of repairing or replacing a motor electrically “starved” by the
use of supply wires which are too small.
GROUNDING
Improperly grounded electrical components
are shock hazards. Make sure all the components are properly grounded to prevent death
or serious injury.
This product must be grounded. Grounding reduces the risk
of electrical shock by providing an escape wire for the
electrical current if short circuit occurs.
All electrical hook-ups must be performed by a qualified
electrician. Installations must be in accordance with local and
national electrical codes.
1. A service disconnect and fuses or a circuit breaker must be
installed to supply electric power to this compressor. Make
sure the circuit is sized to handle the full operating load as
shown in the table.
2. Remove the front panel to access the wiring area.
3. Using appropriate strain relief and cable management techniques, connect the power cable to the power junction block
and the ground wire to the ground bar.
Consult your NEC and local codes for wire size.
Pg 5
30HP - 40HP Scroll Enclosure Air Compressors
INSTALLATION Cont’d
GENERAL FAULT DRY CONTACT CONNECTIONS
1. Turn the compressor off and lockout the power to the compressor per OSHA standards.
2. Remove the door panel from the scroll cabinet to access
the operating panel.
3. Output wires should be connected between terminals 10
and 11. The dry contacts are normally closed; when there is a
fault or loss of power to the system, the contacts open. The
contact rating is as follows: 240VAC/2A or 30VDC/2A,
maximum.
4. For larger load devices such as a horn or emergency light,
a relay should be used.
5. The signal wires should be between 24 and 12 AWG.
6. Replace the door panel to the scroll compressor cabinet.
7. Return the power to the compressor system.
PIPING
Never use plastic (PVC) pipe for compressed air. Serious
injury or death could result.
Any tube, pipe or hose connected to the unit must be able to
withstand the temperature generated and retain the pressure.
All pressurized components of the air system must have a
pressure rating higher than or equal to the ASME safety valve
setting. Incorrect selection and installation of any tube, pipe
or hose could result in bursting and injury.
Never install a shut-off valve between a compressor pump
and the tank without an appropriate safety valve. Personal
injury and/or equipment damage may occur. Never use
reducers in discharge piping.
The Powerex Scroll Enclosure Air Compressor has an ASME
safety relief valve at the outlet pipe nipple connection point.
When creating a permanently installed system to distribute
compressed air, find the total length of the system and select
pipe size from the chart. Bury underground lines below the
frost line and avoid pockets where condensation can gather
and freeze.
Apply air pressure to the piping installation and make sure all
joints are free from leaks BEFORE underground lines are
covered. Before putting the unit into service, find and repair
all leaks in the piping, fittings and connections.
Select the size of the air receiver so that the combined volume
of the air receiver and facility piping results in a long enough
cycle time to keep any individual motor from starting more
than once every 3.43 minutes. Selecting the widest possible
spread between high and low system set point pressure along
with the largest differential for each pump interval will
reduce the starting frequency.
The table below shows the recommended tank size in gallons
per model. Some conditions of air usage may require
additional volume.
Differential* SEH SEO
Min 240 240
Standard 200 200
Max 120 120
Chart 3
*
Pressure setting selected on control panel
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 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.
REMOTE INTAKE PIPING
Powerex compressor systems with pipe thread connectors on
the intake filters are intended for installation with remote air
intake. Piping for the remote intake system should be
installed at the final operating site.
Under some conditions, the intake piping may facilitate the
condensation of humidity in the intake air stream into liquid
water.
THE INTAKE FILTERS SUPPLIED BY POWEREX WILL
NOT STOP INGESTION OF LIQUID WATER BY THE
PUMPS. LIQUID WATER GOING INTO THE PUMPS
WILL DAMAGE THE PUMPS AND VOID THE
WARRANTY.
liquid water in the intake piping before the air filters. Drip
legs must be sized with low enough air velocity to make sure
they are effective at capturing liquid water in the intake air
and must be maintained (drained) at frequent intervals to
make sure they remain effective.
Always install drip legs with
sufficient capacity to capture
Pg 6
30HP - 40HP Scroll Enclosure Air Compressors
INSTALLATION Cont’d
SAFETY VALVES
Safety Valves must be installed on every receiver. The flow
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.
CHECK VALVES
Do not install a check valve between the compressor and the
air receiver or facility piping. If a check valve is installed, the
compressor pressure sensor will see rapid pressure drops and
cause short cycling of the motors and other control problems.
ISOLATION VALVES
An isolation valve should be installed between the
compressor and the air receiver to facilitate maintenance.
Make sure the valve is open when operating the compressor.
A second isolation valve should be installed between the air
receiver and the facility piping.
NOTE: The "Jog" function on the screen overrides the ON
switch. The motors will operate if the Jog button is
continually depressed. To reach "JOG" press the SYSTEM
STATUS button, then press PUMP INFO for the pump
module you want to jog.
The PUMP INFO screen is shown below. Press the > arrow
button to jog pumps.
Use the < arrow button to go back and select the next pump.
If the SYSTEM STATUS screen is not visible, go back to the
MAIN screen and select SYSTEM STATUS. (see below)
CONTROL PANEL - DISPLAY AND INPUT
The Powerex scroll enclosure air compressor has a power
control switch and a touch screen or HMI panel on the front
to allow operation and monitoring of the unit. See Controls
section for details on operating the unit using the touch
screen.
The switch beside the screen controls power to the motor
starters. When the system is energized the HMI screen will be
lit and the control screen is active, but the motors will not run
until the ON button is pushed. When ON is pushed, the center
section of the switch will illuminate, enabling the PLC control of the system, and will remain lit until the OFF button is
pushed. The OFF button on the switch may be used to stop
the compressors at any time. The switch does not turn off
power to the panel so be sure to lock out the power source
before opening the panel for service.
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. Confirm that the electric power source and ground have
been firmly 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 the
proper size.
7. Securely mount all panels and guards.
8. Check that all fuses, circuit breakers etc., are the proper
size.
9. Make sure the inlet filter is properly installed.
10. Secure the area in front of the compressor to prevent
unauthorized access during this check. Remove the front-left
and right-rear access panels so that the motor pulley on each
set is visible.
Pg 7
30HP - 40HP Scroll Enclosure Air Compressors
OPERATION Cont’d
Go to PG 2 of the SELECT SETPOINT screen.
Check motor rotation before
operating the unit.
Turn power on the unit and exercising extreme caution, use
the HMI display/input screen to jog each motor. (To reach the
JOG function, select SYSTEM STATUS from the MAIN
screen, then select PUMP INFO for each installed pump/
motor set). Powerex wires the controls so all motors rotate in
the same direction. Correct rotation is CW looking at the
pulley from the motor side. If all or any of the motors rotate
incorrectly, lock out the power, correct the input wiring and
recheck. If any motor wiring is ever disturbed or modified,
recheck each motor for proper rotation direction. Restore the
access panels before operating the unit.
The second page of the SETUP screen will appear.
INITIAL START UP AND SET UP OF THE CONTROL
The control is programmed at the factory and default settings
are installed. To access certain control functions you will
need to enter a seven digit authorization code. You may select
your own code. We recommend using the last seven digits of
the unit serial number.
To enter the code, from the SYSTEM STATUS screen touch
SELECT SETPOINT.
Touch the rectangle to enter the Authorization Code and enter
seven digits using the keypad that appears. Powerex suggests
using the last seven digits of the serial number.
You may now return to the SYSTEM STATUS screen.
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.
3.Verify the display screen is li t.
4. If an isolation valve is installed between the compressor
unit and the air receiver, make sure it is open. Close the
isolation valve between the air receiver and the facility
piping.
Pg 8
The sequence is an
example of operation
of SEO4007.
SEH3007 operate 6 air
ends.
Chart 4
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