270L BELT DRIVE AIR COMPRESSOR 7.5HP
3PH
MODEL NO: SAC32775B
Thank you for purchasing a Sealey product. Manufactured to a high standard, this product will, if used according to these
instructions, and properly maintained, give you years of trouble free performance.
IMPORTANT: PLEASE READ THESE INSTRUCTIONS CAREFULLY. NOTE THE SAFE OPERATIONAL REQUIREMENTS, WARNINGS & CAUTIONS. USE
THE PRODUCT CORRECTLY AND WITH CARE FOR THE PURPOSE FOR WHICH IT IS INTENDED. FAILURE TO DO SO MAY CAUSE DAMAGE AND/OR
PERSONAL INJURY AND WILL INVALIDATE THE WARRANTY. KEEP THESE INSTRUCTIONS SAFE FOR FUTURE USE.
1. SAFETY
1.1. ELECTRICAL SAFETY
WARNING! Electrical installation of compressor to a 3-phase 415volt supply must only be carried out by a qualified electrician.
Make sure the power supply cable is correctly connected to the earth. It is the user’s responsibility to read, understand and comply
with the following:
You must check all electrical equipment and appliances to ensure they are safe before using. You must inspect power supply leads,
plugs and all electrical connections for wear and damage. You must ensure the risk of electric shock is minimised by the installation
of appropriate safety devices. An RCCB (Residual Current Circuit Breaker) should be incorporated in the main distribution board.
You must also read and understand the following instructions concerning electrical safety.
9 The Electricity At Work Act 1989 requires all portable electrical appliances, if used on business premises, to be tested by a
qualiedelectrician,usingaPortableApplianceTester(PAT),atleastonceayear.
9 The Health & Safety at Work Act 1974 makes owners of electrical appliances responsible for the safe condition of the appliance and
the safety of the appliance operator. If in any doubt about electrical safety, contact a qualified electrician.
9 Ensure insulation on all cables and the product itself is safe before connecting to mains power supply.
9 Ensure that cables are always protected against short circuit and overload.
9 Regularly inspect power supply, leads, plugs and all electrical connections for wear and damage, especially power connections, to
ensure that none are loose.
WARNING! IMPORTANT: Ensure the voltage marked on the product is the same as the electrical power supply to be used, and
check that plugs are fitted with correct capacity fuse.
8 DO NOT pull or carry the powered appliance by its power supply lead or output cables.
8 DO NOT pull power plugs from sockets by the power cable.
8 DO NOT use worn or damaged leads, plugs or connections. Immediately replace or have repaired by a qualified electrician.
These particular compressors are supplied without a mains plug. Follow the instructions below regarding the fitting of an appropriate
plug.
1.2. Model SAC32775B requires a 415v 3 phase supply and must have an appropriate plug added.
WARNING! Electrical installation of the compressor to a 3 phase 415 volt supply must only be carried out by a qualified electrician.
Ensure the power supply cable is connected to the Earth.
1.2.1. This product must be fitted with a 3 phase plug wired as illustration in (fig.1), wired to an appropriately
fused supply.
Connect GREEN/YELLOW wire to Earth ‘E’
Connect BROWN wire to L1 Terminal.
Connect BLACK wire to L2 Terminal.
Connect the GREY wire to L3 Terminal.
WARNING!Itisessentialtoobserveacw(fig1)Pulleydirectiononinitialstartup.Ifcw
observed, stop immediately and consult a qualified electrician to invert 2 phases.
NOTE: The cable core colours found in the mains cable on this compressor are consistent
with Amendment 2 to 7671:2001. When completed, check there are no bare wires, that all
wires have been connected correctly and the cable restraint is tight.
8 DO NOT use this product with a standard extension cable. Only use ARMOURED extension cable.
IMPORTANT USER INFORMATION! Over-current protection of the power circuit is required in
accordance with 7.2 of EN 60204-1:2006. The supply disconnecting device to be in accordance with 5.3 of EN 60204-1:2006.
Ask a qualified electrician about compliance. The use of extension leads to connect these compressors to the mains is not
recommended.
SAC32775B Issue 2 (2,3) 24/04/23
Original Language Version
© Jack Sealey Limited
Refer to
instructions
Electrical shock
hazard
Warning:
hot surfaces
Wear eye
protection
Wear ear
protection
Wear protective
clothing
Warning
g.1
Warning
automatic
start up
Warning:
Under pressure
Switcho
before servicing
or maintenance
Belt guard
must be in
place
DO NOT
Connect face
mask directly
to compressor
DO NOT
open the air
cock before
an air hose is
attached
1.3. GENERAL SAFETY
9 Familiarise yourself with the application and limitations of the compressor.
9 Ensure the compressor is in good order and condition before use. If in any doubt DO NOT use the unit and contact an electrician/
service agent.
WARNING! Compressor must only be serviced by an authorised agent. DO NOT tamper with, or attempt to adjust, pressure
switch or safety valve. DO NOT drill, weld or deform the compressed air tank.
9 Before moving, or maintaining the compressor ensure it is unplugged from the mains supply and that the air tank pressure has been
vented.
9 Maintain the compressor in good condition and replace any damaged or worn parts. Use genuine parts only. Unauthorised parts may
be dangerous and will invalidate your warranty.
9 Read the instructions relating to any accessory to be used with this compressor. Ensure the safe working pressure of any air
appliance used exceeds compressors output pressure. If using a spray a gun, check that the area selected for spraying is provided
with an air change/ventilation system.
9 Ensure the air supply valve is turned off before disconnecting the air supply hose.
9 Move the compressor on a pallet or using slings beneath receiver near to domed ends, employing a fork lift truck or wheeled gantry
crane. Beware of off centre loads.
9 Use the compressor in a well ventilated area and ensure it is placed on a firm surface.
9 Keep tools and other items away from the compressor when it is in use, and keep area clean and clear of unnecessary items.
9 Ensure the air hose is not tangled, twisted or pinched.
9 Keep children and unauthorised persons away from the working area.
8 DO NOT disassemble compressor for any reason. The unit must be checked by qualified personnel only.
8 DO NOT use the compressor outdoors, or in damp, or wet, locations.
8 DO NOT operate within the vicinity of flammable liquids, gases or solids.
8 DO NOT touch the compressor cylinder, cylinder head or pipe from head to tank as these may be hot.
8 DO NOT use this product to perform a task for which it has not been designed.
8 DO NOT deface the certification plate attached to the compressor tank.
8 DO NOT cover the compressor or restrict air flow around the unit whilst operating.
▲ DANGER! DO NOT direct the output jet of air towards people or animals.
8 DO NOT operate the compressor without an air filter.
8 DO NOT allow anyone to operate the compressor unless they have received full instructions.
WARNING! The air tank is a pressure vessel and the following safety measures apply:
8 DO NOT tamper with the safety valve, DO NOT modify or alter the tank in any way and DO NOT strap anything to the tank.
8 DO NOT subject the tank to impact, vibration or to heat and DO NOT allow contact with abrasives or corrosives.
9 Drain condensation from tank daily.
WARNING! If an electrical fuse blows, ensure it is replaced with an identical fuse type and rating.
9 When not in use, store the compressor carefully in a safe, dry, childproof location.
2. INTRODUCTION
Heavy-duty 3-phase compressor suitable for the professional workshop. Triple cylinder pump system coupled with a 7.5hp motor maximizes
performancetokeeprunningcostslowcomparedtosinglestage,singlephasemodels.Pumpfeaturesheavy-dutyfullcastcylinders,capped
byalloyheadsforimprovedheatdissipationandlong-life.Heavy-dutydriveguardsprotectbeltandywheelthatisdesignedtoforceairover
thepumptoaidcooling.SuppliedwithfullCEcertication,testcerticatesandoperating/maintenancemanual.Includesadrainvalveforeasy
release of condensed water build-up in the tank.
3. SPECIFICATION
Model No:..........................................................SAC32775B
Air Displacement cfm(L/min): ..................................29.7(840)
Maximum Free Air Delivery cfm(L/min): ..................26.2(742)
MaximumPressure: ......................................... 145psi(10bar)
Minimum Rated Supply: ................................................... 32A
Motor Output: ................................................................7.5hp
Outlet: .......................................................................1/2”BSP
Phase: ..............................................................................3ph
Power Supply Cable Length: .............................................2m
Receiver Capacity: .........................................................270L
Size (W x D x H): ................................1500 x 620 x 1080mm
Speed: .......................................................................970rpm
Supply: ....................................................................415V/32A
4. ASSEMBLY
Unpack the product and check contents. Should there be any damaged or missing parts contact you supplier immediately.
Refer to attached parts list.
Save the packing material for future transportation of the compressor. We recommend that you store the packing in a safe location,
at least for the period of the guarantee. Then, if necessary, it will be easier to send the compressor to the service centre.
4.1. ATTACH ANTI-VIBRATION MOUNTS
4.1.1. Assemble the anti-vibration mounts to the bottom tank brackets using the nuts and washers supplied (fig 2).
4.2. ATTACH THE FILTERS
4.2.1. Screw the filter unit into the port openings in each head as shown in (fig 5).
4.2.2. Placeafiltercoverovereachthreadedrodprotrudingfromthebackhalfofthefilterandsecureeachwithawingnut(fig5).
5. OPERATION
WARNING! Ensure that you have read, and fully understood and apply Section 1 Safety Instructions.
g.2
g.3
g.4
SAC32775B Issue 2 (2,3) 24/04/23
Original Language Version
© Jack Sealey Limited
5.1. IMPORTANT. The use of extension leads to connect this compressor to the mains is not recommended as the resulting voltage
drop reduces motor, and therefore pump performance and could damage your compressor.
5.2. Confirm that the mains voltage corresponds with the voltage shown on the compressor data plate.
5.3. The compressor should be operated on a horizontal flat surface, or one that does not exceed 5° either transversely, and should be in
a position that allows good air circulation around the unit, 1000mm nominal gap.
5.4. Before using the compressor check the oil level by referring to the oil sight glass (fig 5), if the oil level is not up to the red centre mark
it should be further topped up with recommended oil, see section 6.7.
5.5. To top up, undo filler cap (fig 5), top up oil level to required level, then replace filler cap.
5.6. Take care when selecting tools for use with the compressor. Air tool manufacturers normally express the volume of air to operate
a tool in cubic feet per minute (cfm). This refers to free air delivered by the compressor (‘air out’) which varies according to the
pressure setting. DO NOT confuse this with the compressor displacement which is the air taken in by the compressor (‘air in’).
‘Air out’ is always less than ‘air in’ due to losses within the compressor.
5.7. STARTING THE COMPRESSOR.
5.7.1. ToturnthecompressorondepressthegreenONbutton(g6).
5.7.2. ToturnthecompressorodepresstheredbuttonOFF(g6).
5.7.3. Check that the ON/OFF button is in the OFF position.
5.7.4. PlugthemainsleadintomainssupplyandstartthecompressorbydepressingthegreenONbutton(g6).
5.7.5. Leave the compressor running with no air line or tools connected. Make sure that the pressure in the tank rises and that the
compressor stops automatically when the maximum pressure is reached. This value is written on the specification plate and
may take in excess of 5 minutes. The compressor will now operate automatically. The pressure switch (fig 6) stops the motor when
the maximum tank pressure is reached and restarts it when pressure falls below the minimum threshold approximately 2bar
(29psi) less than the maximum pressure.
5.7.6. Stop the compressor by depressingtheredbuttonOFF(g6). The compressed air inside the compressor head will flow out via the air
line tube situated beneath the switch housing. Restart is made easier and prevents the motor from being damaged.
DO NOT, other than in an emergency, stop the compressor by switching off the mains power, or by pulling the plug out, as the
pressure relief will not then occur and motor damage may result upon restart. When the compressor runs correctly and is stopped
correctly there will be:
A: A whistle of compressed air when the motor stops.
B: A protracted whistle (about 20-25 seconds) when the compressor starts with no pressure in the tank.
NOTE: If the motor does not cut in and out, but runs continuously when using an air appliance, the capacity of the compressor may
be too small for the equipment or tool.
Should the pressure in the main tank exceed the pre-set maximum, the safety valve (fig 5) will activate.
WARNING! For this reason DO NOT tamper with, or adjust, the pressure switch (fig 6) or safety valve (fig 5).
6. MAINTENANCE
In order to keep the compressor in good working condition, periodic maintenance is essential.
WARNING!Beforeperforminganymaintenanceoperation,switchothecompressor,disconnectfromelectricitysupplyand
release all air from the tank.
IMPORTANT! Failure to carry out maintenance tasks may invalidate the warranty on your compressor.
6.1. OPERATIONS TO BE CARRIED OUT AFTER THE FIRST 5 WORKING HOURS:
A: Check that all bolts/nuts are tight, particularly those retaining the crank case and cylinder head.
6.2. OPERATIONS TO BE CARRIED OUT AFTER THE FIRST 50 WORKING HOURS:
B: Replace the lubricating oil.
6.3. OPERATIONS TO BE CARRIED OUT DAILY:
A:Draincondensationbyopeningthevalvelocatedunderthetank(g7).Placeacontainerunderthevalveandslowlyopenthe
valve by turning counter clockwise.
6.4. OPERATIONS TO BE CARRIED OUT EVERY 100 HOURS
NOTE: Or more frequently, if the compressor operates in a very dusty atmosphere.
A: Check oil level and, if necessary, top up.
B:Removethelterelements(g3)andcleanwithcompressedair(weareyeprotection).DO NOT operate the compressor
withouttheltersasforeignbodiesordustcouldseriouslydamagethepump.
C: Check for oil leaks.
6.5. OPERATIONS TO BE CARRIED OUT EVERY 200 HOURS:
A:Replacethelubricatingoil.Foroilspecicationssee6.7.
Removethellercap(g5)thenunscrewthedrainplug(g5)anddraintheoilintoasuitablewasteoilcontainer.
Drain when the compressor is hot so that oil drains rapidly and completely. Incline compressor to ensure complete drainage.
Replacedrainplugandrellthroughtheoillleraperture.DO NOToverll.Replacellercap.
B: Check the automatic cut-out at maximum pressure and the automatic cut-in at 2bar below.
WARNING!NevermixdierentoilsandDO NOT use non-detergent/low quality oils as the compressor may be damaged.
g.5
g.6
g.7
SAC32775B Issue 2 (2,3) 24/04/23
Original Language Version
© Jack Sealey Limited
WARNING! Dispose of waste oil only in accordance with local authority requirements.
6.6. OPERATIONS TO BE CARRIED OUT EVERY 500 HOURS:
A:Replaceairlter(gs3&5).
B:Checkalltubettingsandelectricalconnections.
6.7. OIL
Recommended oil for compressors, suitable for room temperatures ranging from +5°C to +25°C.
SEALEYCPOorequivalentSAE40compressoroil.Roomtemperaturebelow+5°C:SAE20compressoroil.
IMPORTANT WARNING-Aircontaminantstakenintothecompressorwillaectoptimumperformance.Example:Bodyllerdust
orpaintoverspraywillclogthepumpintakelterandmaycauseinternaldamagetopump/motorcomponents.
WARNING! Any parts damaged by any type of contamination will not be covered by warranty.
6.8. Inspection of pressure tank both inside and out.
UnderthePRESSURESYSTEMSSAFETYREGULATIONS2000itistheresponsibilityoftheownerofthecompressortoinitiatea
system of inspection that both defines the frequency of the inspection and appoints a person who has specific responsibility for
carrying out the inspection.
7. TROUBLESHOOTING
FAULT POSSIBLE CAUSE REMEDY
1A)Pressuredropinthetank Air leaks at connections Run compressor to maximum pressure, switch off.
Brush soap solution over connections and look for
bubbles. Tighten connections showing leaks.
If problem persists contact Authorised Service Agent
1B)Pressuredropinthetank Air leaks from safety valve It should be replaced, unless leaking at a joint
which can be sealed.
1C)Pressuredropinthetank Air leaks from cylinder head gasket Check tightness of head bolts. If leak continues
contact authorised Service Agent
2)Pressureswitchvalveleakswhen
compressor is idle
Non-return valve seal defective Empty the air tank. Remove the check valve cap,
spring and seal. Clean the seal and its seat, or if
necessary replace the seal (fig 5)
3) Air leaks from tank body or tank welds Internal corrosion caused by infrequent tank
draining or non permitted modifications to tank
Tank could rupture or explode. Cannot be repaired
DISCONTINUE USE IMMEDIATELY
4A) Motor stops and will not restart Thermal cut out has operated Allow unit to cool for 30 minutes before restarting
4B) Motor stops and will not restart Supply fuse has tripped Presstripresetbutton(fig6)andrestartunit.If
repeated tripping occurs replace the check valve or
contact authorised Service Agent
5) Compressor stops and does not restart Motor failure Contact Authorised Service Agent
6A) Compressor does not stop at
maximum pressure
Pressureswitchfault Contact Authorised Service Agent
6B) Compressor does not stop at
maximum pressure
Filter clogged
Head gasket or valve fault
Replace filter element.
Contact Authorised Service Agent
7) Compressor noisy with metallic knock Bearing or piston damage Contact Authorised Service Agent
8) Excessive moisture in discharged air High humidity environment Drain tank after each use
Sealey Group, Kempson Way, Suffolk Business Park, Bury St Edmunds, Suffolk. IP32 7AR
01284 757500 sales@sealey.co.uk www.sealey.co.uk
ENVIRONMENT PROTECTION
Recycle unwanted materials instead of disposing of them as waste. All tools, accessories and packaging should be sorted,
taken to a recycling centre and disposed of in a manner which is compatible with the environment. When the product
becomes completely unserviceable and requires disposal, drain any fluids (if applicable) into approved containers and
dispose of the product and fluids according to local regulations.
WEEE REGULATIONS
Dispose of this product at the end of its working life in compliance with the EU Directive on Waste Electrical and Electronic Equipment
(WEEE). When the product is no longer required, it must be disposed of in an environmentally protective way. Contact your local solid
waste authority for recycling information.
Note: It is our policy to continually improve products and as such we reserve the right to alter data, specifications and component parts without prior
notice.
Important: No Liability is accepted for incorrect use of this product.
Warranty: Guarantee is 24 months from purchase date, proof of which is required for any claim.
SAC32775B Issue 2 (2,3) 24/04/23
Original Language Version
© Jack Sealey Limited
REGISTER YOUR
PURCHASE HERE
