Powerex PMAC User manual

PMAC Air Compressor
Please read and save these instrucons. Read carefully before aempng to assemble, install, operate or maintain the product described.
Protect yourself and others by observing all safety informaon. Failure to comply with instrucons could result in personal injury and/or
property damage! Retain instrucons for future reference.
Descripon
Powerex •100 Mundy Memorial Drive •Mt. Juliet, TN 37122 •USA
P 1.888.769.7979 •F 513.367.3125 •www.powerexinc.com
IN598601AV •01/2020
Page 1 of 12
General
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 oers a
dynamically balanced air end which insures vibraon free operaon.
No oil separaon, oil ltraon, or inlet valves are required on the
Powerex scroll unit.
Compression Cycle
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, at plane or base. A scroll set,
the basic compression element of a scroll compressor, is made up
of two idencal spirals which form right and le 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 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 rotang
during this process so the 180° phase relaonship of the scrolls is
maintained. The compressor’s inlet is at the outer boundary of the
scrolls. The compressed gas is discharged through the outlet at the
center of the xed scroll so no valves are needed.
Tip Seal
The p seal on the scroll compressor is self-lubricated and allows
the unit to operate eciently without oil and expensive ltraon.
Bearings
The bearings on the scroll compressor are regreaseable to allow
extended compressor life.
Intended Usage
This Powerex Oil-less Scroll set is intended for use as part of a system.
The compressor set provides compressed air from the oil-less scroll
pump when the electric motor is powered. The set includes the intake
air lter, pump, motor, coupling assembly, appropriate safety guards,
with the oponal aercooler, check valve, safety relief valve, and
inter connecng piping and tubing. Do not operate if the components
are missing and do not modify or remove any components without
approval from Powerex.
The Powerex module may be supplied with an intake lter installed
on the pump or the set may be intended for piping to a remote lter.
Always make sure that an inlet lter is in place and has a maximum
ltraon of 2 micron and that the inlet air system is not restricted.
Operang the scroll pump with a restricted inlet will result in
pump damage. Do not modify or remove the Powerex check valve
or relief valve. The relief valve will open if the set is accidentally
operated with an isolaon valve closed.
PMAC Air Compressor shown with oponal aercooler assembly
Safety Guidelines
A SEPARATE SAFETY BOOKLET IS PROVIDED ALONG WITH THIS
MANUAL. READ AND UNDERSTAND THE SAFETY BOOKLET. This manual
contains informaon that is very important to know and understand.
This informaon is provided for SAFETY and to PREVENT EQUIPMENT
PROBLEMS. To help recognize this informaon, observe the following
symbols. MAKE SURE EVERYONE OPERATING OR SERVICING THE
COMPRESSOR READS AND UNDERSTANDS ALL THE INFORMATION
PROVIDED. The operator must install equipment in a safe locaon and
is responsible for following all related local work safety requirements
and regulaons.
Danger indicates an imminently hazardous
situaon which, if not avoided, WILL result in
death or serious injury.
Warning indicates a potenally hazardous
situaon which, if not avoided, COULD result in
death or serious injury.
Cauon indicates a potenally hazardous situaon
which, if not avoided, MAY result in minor or
moderate injury.
Noce indicates important informaon, that if not
followed, may cause damage to equipment.
NOTE: Note indicates informaon that requires special aenon.

PMAC Air Compressor
Powerex •100 Mundy Memorial Drive •Mt. Juliet, TN 37122 •USA
P 1.888.769.7979 •F 513.367.3125 •www.powerexinc.com
IN598601AV •01/2020
Page 2 of 12
This compressor/pump is NOT equipped and should NOT be
used “as is” to supply breathing quality air. For any applicaon
of air for human consumpon, you must t the air compressor/
pump with suitable in-line safety and alarm equipment. This
addional equipment is necessary to properly lter and purify
the air to meet minimal specicaons for Grade D breathing as
described in Compressed Gas Associaon Commodity Speci-
caon G 7.1 - 1966, OSHA 29 CFR 1910. 134, ANSI and/or Cana-
dian Standards Associaons (CSA).
DISCLAIMER OF WARRANTIES IN THE EVENT THE COMPRES-
SOR IS USED FOR THE PURPOSE OF BREATHING AIR APPLICA-
TION AND PROPER IN-LINE SAFETY AND ALARM EQUIPMENT
IS NOT SIMULTANEOUSLY USED, EXISTING WARRANTIES ARE
VOIDED, AND POWEREX DISCLAIMS ANY LIABILITY WHATSO-
EVER FOR ANY LOSS, PERSONAL INJURY OR DAMAGE.
Breathable Air Warning
Components
Oil-less Scroll Compressor Pumps
The Powerex scroll compressor oers a dynamically balanced air
end which insures vibraon-free operaon. The rotary design permits
a connuous 100% duty cycle. No oil separaon, oil ltraon, or inlet
valves are required on the Powerex Scroll unit.
Dry Type Inlet Filter
The 2µ lter provides protecon for the precision components
within the compressor. This lter must be serviced at regular
intervals to maintain compressor performance. See page 4 for the
recommended maintenance schedule.
Isolaon Mounts
The basic unit is supplied with isolaon mounts. The installer may
substute these mounts for a set of their own choosing. However, it is
recommended that Powerex review these alternate isolaon mounts
that will be used in place of the supplied mounts.
Permanent Magnet AC Motor
The permanent magnet motor is very compact and is more ecient
compared with tradional inducon motors.
Inverter
The inverter accepts 500 to 750 Volts DC which and changes it into
3 Phase 350 Volt AC to power the electric motor. This inverter also
provides data outputs which may interface with other systems via
analog and digital signals.
Default outputs:
Analog: Power Consumpon 0 to 10 V or 0 to 20 mA
Fault Signal: Normally Closed 24V
Fieldbus: MODBus
Installaon
Unpacking & Receiving the Unit
Immediately upon receipt of the compressor system, the unit
should be inspected for any damage which may have occurred in
shipment. Any shipping damage must be immediately led with the
freight carrier. Repair or replace damaged items before use.
The compressor nameplate should be checked to see if the unit is
the correct model and voltage as ordered.
Do not operate unit if damaged during shipping,
handling or use. Damage may result in bursng
and cause injury or property damage.
Applicaon
When the scroll compressor is to be used in applicaons other
than the compressing of atmospheric air, please contact a Powerex
representave for engineering and warranty informaon at 1-888-
769-7979.
Installaon Site
1. The scroll compressor must be located in an environment
compliant with the compressor's intended use. If being
installed in an alternate locaon, please obtain prior approval
for change of locaon from Powerex.
2. The area should be free of excessive dust, toxic or ammable
gases, moisture, water and direct sunlight.
3. Ambient temperatures of –35°F to +104°F are allowed. The
upper range of +104°F has a maximum on me of 4 minutes.
This is to ensure proper operaon and prevent overheang.
4. Ambient Relave Humidity below 96% is allowed. Condensaon
is not permied.
5. Clearance must allow for safe, eecve inspecon and
maintenance.
6. Systems supplied without an aercooler require an approved
check valve and safety valve to be installed downstream of the
compressor’s exhaust.
7. Air receiver(s) or alternate drive devices may be used to ensure
that the motor manufacturer’s recommended number of starts
and stops are not exceeded. Please refer to manufacturer for
details.
NOTE: Contact Powerex for evaluaon of ambient condions
beyond the parameters above for special reduced duty cycle and
product life requirements.
Venlaon
1. If the scroll compressor system is located in an enclosed area,
an exhaust fan or other means with access to outside air and
make up air must be installed.
2. Never restrict the cooling fan exhaust air.
3. Never locate the compressor where hot exhaust air from other
heat generang units may increase the compressor’s operang
temperature.

PMAC Air Compressor
Powerex •100 Mundy Memorial Drive •Mt. Juliet, TN 37122 •USA
P 1.888.769.7979 •F 513.367.3125 •www.powerexinc.com
IN598601AV •01/2020
Page 3 of 12
All electrical hook-ups must be performed by
a qualied electrician. Installaons must be in
accordance with local and naonal electric codes.
Wiring
Use solderless terminals to connect the electric power source
provided. Various electrical connecons may be provided in
accordance with customer requirements. Always ensure the
connecons are proper and that when installing the nal connecon
that proper rotaon of the compressor is witnessed.
Piping
Connect compressed air pipeline to the outlet of the check valve.
Do not modify check valve or replace with any other type. The scroll
compressor does not require a discharge pressure release valve for
shut down unloading. When the electric motor is de-energized, the
compressed air in the outlet pipe and aer cooler will self relieve by
driving the pump in reverse a few turns. This is normal operaon.
Do not modify or restrict the air ow to or from the aer cooler
without review by Powerex Engineering. Improper cooling could lead
to damage of the scroll pump.
Direct Coupled Models
The Powerex Scroll Compressor assembly is designed to
accommodate a variety of mounng opons by ulizing the main
baseplate. Standard mounng uses rubber stud isolaon mounts.
Special models may vary.
Operaon
Before Start-Up
1. Make sure all safety warnings, labels and instrucons have
been read and understood before connuing.
2. Remove any shipping materials, brackets, etc.
3. Conrm that the electric power source and ground have been
rmly connected and are the correct voltage for the motor.
4. Be sure all pressure connecons are ght.
5. Check to be certain all safety relief valves, check valves, etc. are
correctly installed.
6. Check that all fuses, circuit breakers, overloads, etc. are the
proper size.
7. Make sure the inlet lter is properly installed.
8. Once power is connected to the unit, visually check the rotaon
of the compressor pump. If the rotaon is incorrect, have a
qualied electrician correct the motor wiring. Motor should
turn counter clockwise looking at motor end of cooling fan.
If pump is running in the wrong direcon, change
the incoming power leads to correct rotaon.
Operaon in reverse for more than a few seconds will damage the pump
and is not covered under warranty.

PMAC Air Compressor
Powerex •100 Mundy Memorial Drive •Mt. Juliet, TN 37122 •USA
P 1.888.769.7979 •F 513.367.3125 •www.powerexinc.com
IN598601AV •01/2020
Page 4 of 12
Maintenance Schedule
Item Acon Needed
Operang Hours
Remarks
500
2,500 5,000
10,000 15,000 20,000
Inlet Air Filter Inspect, Replace ● ▲ Replace every 2000 hours of operaon or sooner
Blower Fan Clean ●●●●Clean blades
Fan Duct Clean ●●●●Clean duct
Compressor Fins Clean ●Every 2,000 hours or less
Bearings (116 psig Scroll Units) Grease ● ● Grease every 8,000 hrs. on 116 psig pumps
Bearings (145 psig Scroll Units) Grease ●●●●Grease every 4,000 hrs. on 145 psig pumps
Tip Seal (116 psig Scroll Units) Replace ▲ ▲ Replace every 8,000 hrs. on 116 psig pumps
Tip Seal (145 psig Scroll Units) Replace ▲▲▲▲Replace every 4,000 hrs. on 145 psig pumps
Check Valve Replace ▲
Heat Insulaon Pipe Replace ▲ ▲ ▲ Replace every 4,000 hrs. on 145 psig pumps
Pump/Coupling Replace ▲Replace
LEGEND
● Inspect/Clean
▲Replace
NOTES:
1. Inspect and perform maintenance periodically according to the maintenance schedule.
2. The maintenance schedule relates to the normal operang condions. If the circumstances and load condion are adverse, shorten the cycle me and
perform maintenance accordingly.
3. Tip seals do not require early replacement, but must be done before or at 4,000 hours of run me for high pressure pumps. For standard pressure pumps
(116 psig), maintenance must be done before or at 8,000 hours of run me. If the pumps reach 3 years and have not yet accumulated the minimum run
hours menoned above (4,000 hours for high pressure, 8,000 hours for standard pressure), perform the greasing operaon for the bearings, with the
amount of grease reduced by 25%.
4. Under adverse condions, more frequent preventave maintenance may be benecial. Consult Powerex for special arrangements.
For details of compressor pump service procedures, see scroll pump maintenance instrucon manual.

PMAC Air Compressor
Powerex •100 Mundy Memorial Drive •Mt. Juliet, TN 37122 •USA
P 1.888.769.7979 •F 513.367.3125 •www.powerexinc.com
IN598601AV •01/2020
Page 5 of 12
Troubleshoong Guide
Problem Correcve Acon
Motor does not run, runs slowly or is excessively noisy
1. Check wiring—make sure minimum voltage requirement is met and lead
wires are connected properly. Correct as needed.
2. Check to make sure motor is not overloaded. Remove coupling and
determine if noload operaon of motor is correct. Check rotaon of
pump by hand. It should turn smoothly. If not, check for pump damage or
obstrucon in the pump.
Pump is noisy or rough, or puts too much load on the motor
1. If amp draw and vibraon are normal, allow the pump to run for a few
minutes and determine if noise diminishes and disappears. If not, contact
Powerex at 1-888-769-7979.
2. Check to make sure isolaon valves are open. Open ASME safety relief valve
at the aer cooler. Stop unit and correct valve installaon or seng.
3. Check to make sure that the pump is open to intake air. If isolaon valves
are used on intake and are accidently closed when pump is running,
pump damage can occur. This is not covered under warranty. Powerex
recommends using a three way valve if isolaon is desired so that no maer
the valve posion, a path to intake air is always open.
Amp draw is high
1. Check wiring—make sure voltage is within specied range and lead wires
are connected properly. Correct as needed.
2. Check to make sure motor is not overloaded. Check rotaon of pump by
hand. It should turn smoothly. If not, check for pump damage or obstrucon
in the pump.
Excessive vibraon
1. Check for damage. If the motor sha becomes bent due to shipping, the
mass of the pulley will be o center and generate vibraons. Replace the
motor.
2. If the pump is damaged, the fan may rub and cause noise. It is possible to
replace just the fan. Contact Powerex at 1-888-769-7979 for instrucons.
3. Some variaon in vibraons prole is normal.
Pump rotates in reverse for more than a few seconds when
power is o.
1. Check valve is leaking, allowing compressed air to vent through the pump.
If allowed to connue, pump damage may occur. Replace check valve.
2. Do not use check valve other than Powerex original equipment.

PMAC Air Compressor
Powerex •100 Mundy Memorial Drive •Mt. Juliet, TN 37122 •USA
P 1.888.769.7979 •F 513.367.3125 •www.powerexinc.com
IN598601AV •01/2020
Page 6 of 12
Ref # Descripon Part #
1REMOTE MOUNT ASSEMBLY (OPTIONAL) ST980210AJ
2 INTAKE FILTER ASSEMBLY VP000501AV
2a FILTER ELEMENT VP000508AV
TOLERANCES NOT
SPECIFIED
DRAWINGS TO CONFORM TO CURRENT REVISION OF THE FOLLOWING ANSI
STANDARDS:
Y14.3 MULTI AND SECTIONAL VIEW DWGS
Y14.5 DIMENSIONING AND TOLERANCING
SYMBOL LEGEND
0.XX u
0.XXX u
g u
SOLID EDGE
DRAWING
INCH
CONFIDENTIAL DISCLOSURE
This drawing is the property of POWEREX
of the SCOTT FETZER
COMPANY and is subject to return on demand.
Its contents are confidential and must not be
copied or submitted to
outside parties for use or examination.
SHEET 1 OF 1
2:1
SCALE
ORIGINATION DATE
APPROVALS ON FILE IN PLM
ITEM ID:
MATERIAL:
DESCRIPTION
150 PRODUCTION DRIVE, HARRISON OH 45030
[phone]
DO NOT SCALE DRAWING FOR
DIMENSIONS
DRAWING NUMBER REVISION
D
SIZE
Error: No reference
--
.05
.005
1
REVISION NOTES
DESCRIPTION ECN PR/NOR
ENTER DESCRIPTION PXECXXXX XXXXXXXX
AUTHOR
apylant
COVER REMOVED
2a

PMAC Air Compressor
Powerex •100 Mundy Memorial Drive •Mt. Juliet, TN 37122 •USA
P 1.888.769.7979 •F 513.367.3125 •www.powerexinc.com
IN598601AV •01/2020
Page 7 of 12
Ref # Descripon Part #
1 PUMP
1a 5 HP High Pressure Pump (SLAE05EHP) SDC016511AV
1b 5 HP Standard Pressure Pump (SLAE05E) SL016502AV
2PERMANENT MAGNET AC MOTOR MC305000AV
3INVERTER N/A
4 COUPLING - PUMP TO MOTOR SL500300AV
5 AFTERCOOLER SL060000AV
6 INTAKE FILTER ASSEMBLY VP000501AV
7SAFETY VALVE
7a High Pressure Safety Valve, 165 PSIG V-215900AV
7b Standard Pressure Safety Valve, 140 PSIG V-215400AV
8CHECK VALVE IP087700AV
9COUPLING, 3/4" NPT, BRASS ST071515AV
10 ISOLATOR FOOT MOUNT IP639100AV
11 SCROLL ADAPTER PLATE GASKET IP088200AV
12 WELLNUT ASSEMBLY ST951005AJ
TOLERANCES NOT
SPECIFIED
DRAWINGS TO CONFORM TO CURRENT REVISION OF THE FOLLOWING ANSI
STANDARDS:
Y14.3 MULTI AND SECTIONAL VIEW DWGS
Y14.5 DIMENSIONING AND TOLERANCING
SYMBOL LEGEND
0.XX u
0.XXX u
g u
SOLID EDGE
DRAWING
INCH
CONFIDENTIAL DISCLOSURE
This drawing is the property of POWEREX
of the SCOTT FETZER
COMPANY and is subject to return on demand.
Its contents are confidential and must not be
copied or submitted to
outside parties for use or examination.
SHEET 1 OF 1 1:4
SCALE
ORIGINATION DATE APPROVALS ON FILE IN PLM
ITEM ID:
MATERIAL:
DESCRIPTION
150 PRODUCTION DRIVE, HARRISON OH 45030
[phone]
DO NOT SCALE DRAWING FOR
DIMENSIONS
DRAWING NUMBER REVISION
D
SIZE
Error: No reference
--
.05
.005
1
REVISION NOTES
DESCRIPTION ECN PR/NOR
ENTER DESCRIPTION PXECXXXX XXXXXXXX
AUTHOR
apylant
6
8
10
11
1
12
5
2
3
4
7
Item
Number
a2Production_Part_Num
ber
Project Quantity
1SDC016511AV 5HP SCROLL HP SDC
E-SERIES PUMP
1
2SL500300AV COUPLING, SDC, PMAC,
5HP
1
3IP088200AV SCROLL ADAPTER
PLATE GASKET
1
4SL060000AV DUPLICATE - USE
715638 INSTEAD
1
5IP087700AV SCROLL CHECK VALVE
(CV-157)
1
6N/A INVERTER, ABM, 5HP
WALL MOUNT.par
1
7MC305000AV MOTOR, PMAC, 5HP,
REMOTE MOUNT
1
8IP639100AV ISOLATOR FOOT
MOUNT PASCALEX BSB
60 135106
1
9N/A WELLNUT ASSEMBLY,
COMPRESSOR GREASE
PLUG, 1_4-20,
.031-.187
1
10 V-215900AV SAFETY VALVE, 165PSI,
141 SCFM, 1/8" MNPT,
HIGH TEMP,
CONRADER
1
11 ST071515AV COUPLING, 3/4" NPT,
BRASS
1
12 VP000501AV 3/4" INTAKE FILTER 1
9

PMAC Air Compressor
Powerex •100 Mundy Memorial Drive •Mt. Juliet, TN 37122 •USA
P 1.888.769.7979 •F 513.367.3125 •www.powerexinc.com
IN598601AV •01/2020
Page 8 of 12
TOLERANCES NOT
SPECIFIED
DRAWINGS TO CONFORM TO CURRENT REVISION OF THE FOLLOWING ANSI
STANDARDS:
Y14.3 MULTI AND SECTIONAL VIEW DWGS
Y14.5 DIMENSIONING AND TOLERANCING
SYMBOL LEGEND
0.XX u
0.XXX u
g u
SOLID EDGE
DRAWING
INCH
CONFIDENTIAL DISCLOSURE
This drawing is the property of POWEREX
of the SCOTT FETZER
COMPANY and is subject to return on demand.
Its contents are confidential and must not be
copied or submitted to
outside parties for use or examination.
SHEET 1 OF 1
1:4
SCALE
ORIGINATION DATE
APPROVALS ON FILE IN PLM
ITEM ID:
MATERIAL:
DESCRIPTION
150 PRODUCTION DRIVE, HARRISON OH 45030
[phone]
DO NOT SCALE DRAWING FOR
DIMENSIONS
DRAWING NUMBER REVISION
D
SIZE
Error: No reference
--
.05
.005
1
REVISION NOTES
DESCRIPTION ECN PR/NOR
ENTER DESCRIPTION PXECXXXX XXXXXXXX
AUTHOR
apylant
6
8
10
11
1
12
5
2
3
4
7
Item
Number
a2Production_Part_Num
ber
Project Quantity
1SDC016511AV 5HP SCROLL HP SDC
E-SERIES PUMP
1
2SL500300AV COUPLING, SDC, PMAC,
5HP
1
3IP088200AV SCROLL ADAPTER
PLATE GASKET
1
4SL060000AV DUPLICATE - USE
715638 INSTEAD
1
5IP087700AV SCROLL CHECK VALVE
(CV-157)
1
6N/A INVERTER, ABM, 5HP
WALL MOUNT.par
1
7MC305000AV MOTOR, PMAC, 5HP,
REMOTE MOUNT
1
8IP639100AV ISOLATOR FOOT
MOUNT PASCALEX BSB
60 135106
1
9N/A WELLNUT ASSEMBLY,
COMPRESSOR GREASE
PLUG, 1_4-20,
.031-.187
1
10 V-215900AV SAFETY VALVE, 165PSI,
141 SCFM, 1/8" MNPT,
HIGH TEMP,
CONRADER
1
11 ST071515AV COUPLING, 3/4" NPT,
BRASS
1
12 VP000501AV 3/4" INTAKE FILTER 1
9
Maintenance
Coupling Element Replacement
The coupling element is designed to last for the life of the scroll
pump. If replacement does become necessary, remove the coupling
guard to gain access to the coupling rubber element (4). The photo
below shows the coupling guard separated from the assembly.
Before performing service, lock out and tag any
electric power source. Vent all air pressure from
the system and lock out and tag any other air sources.
Do not loosen the hexagon screws that secure the
motor adapter plate to the faceplate.
1. Loosen the screws that secure the coupling rubber element
radially to the drive hubs.
2. DO NOT LOOSEN THE SETSCREW THAT SECURES THE DRIVE
HUB TO THE MOTOR SHAFT.
Do not use liquid thread lockers or adhesives. Do
not allow the element to become twisted while
ghtening.
3. Loosen the hex head screws that hold motor adapter plate 1
to motor adapter plate 2 (see image below). The motor must
be supported during this process to prevent damaging the
assembly. Pull the motor straight back to disengage.
6. Insert the Powerex supplied screws with pre-applied Inbus Plus
thread locker into the coupling element holes and ghten the
element securing screws to 37 -lbs.
4. Now the axial bolts securing the rubber coupling element to
the compressor drive hub can be removed. Do not remove
or reposion the drive hubs. Do not move or reposion the
motor mounng plate. Installaon is the reverse of removal.
Tightening torque for the bolts that secure the rubber coupling
element to the hubs is 37 -lbs.
5. To install coupling insert, lightly lubricate the body and
underside of the element securing bolts with light oil or a clean
grease.
Do not lose the 4 alignment pins installed in the
two motor adapter plates. These pins are required
to maintain alignment between the motor and the pump.

PMAC Air Compressor
Powerex •100 Mundy Memorial Drive •Mt. Juliet, TN 37122 •USA
P 1.888.769.7979 •F 513.367.3125 •www.powerexinc.com
IN598601AV •01/2020
Page 9 of 12
Lock out and tag out electric power. Vent all air
pressure from the system and lock out and tag.
DO NOT LOOSEN THE SET SCREW THAT SECURES
THE DRIVE HUB TO THE MOTOR SHAFT.
Pump replacement is not feasible for technical
reasons. If a pump experiences catastrophic failure
or reaches the end of its useful life replace the compelete compressor
assembly.
Motor Replacement
1. Remove the electric connecons from the motor.
2. Remove coupling guard. Loosen the screws that secure the
coupling rubber element radially to the drive hubs.
3. Loosen the hex head screws that hold motor adapter plate 1 to
motor adapter plate 2 (see image below). Support the body of
the motor so it can be pulled straight back. The drive coupling
hub will come free with the motor.
4. Remove motor adapter plate 1 from the motor by removing
the 4 hex head screws that secure the motor to the adapter
plate.
5. If the motor is being replaced, measure the posion of the
motor slide drive hub relave to the exisng motor sha.
Loosen the setscrew and place the hub on the new motor and
posion the new hub in the same locaon on the new motor.
Make sure the key is in place. Tighten the set screw to 7.5 -lbs
with Blue 242 Locte.
6. Installaon is the reverse of removal. Be sure the key is in place
on the motor sha and that the 4 alignment pins are in place
in the adapter plates.
7. Install and ghten the screws to secure the rubber element to
the motor drive hub.
8. Replace the coupling guard.
9. Reconnect the electric power and verify proper rotaon before
running the compressor more than a few seconds.
DO NOT LOOSEN THE HEXHEAD SCREW THAT
SECURES THE ADAPTING PLATE TO THE FACEPLATE.
Do not lose the 4 alignment pins installed in the
two motor adapter plates. These pins are required
to maintain alignment between the motor and the pump.

PMAC Air Compressor
Powerex •100 Mundy Memorial Drive •Mt. Juliet, TN 37122 •USA
P 1.888.769.7979 •F 513.367.3125 •www.powerexinc.com
IN598601AV •01/2020
Page 10 of 12
Notes