Makita AC310H - Air Compressor Manual

Explanation of general view

1. Air Tank pressure gauge
2. Regulated pressure gauge "HP"
3. Air regulator "HP"
4. Quick coupler "HP" (Air outlet)
5. Regulated Pressure gauge "RP"
6. Air regulator "RP"
7. Quick coupler "RP" (Air outlet)
8. Drain valve
9. Pressure Switch

SPECIFICATIONS

Model	AC310H
MAX Input Power	1800 W
SCFM @ 40 PSIG (L/min @ 2.8 bar)	3.7 (106 L)
SCFM @ 90 PSIG (L/min @ 6.2 bar)	3.6 (101 L)
SCFM @ 300 PSIG (L/min @ 21 bar)	2.7 (77 L)
Cut-In Pressure	2.3 MPa (23 bar)
Cut-Out Pressure	2.8 MPa (28 bar)
Bore x Stroke x Qty	62 mm x 31 mm x 1 45 mm x 10 mm x 1
Voltage -Single Phase	220 - 240 V AC
Hz	50 Hz
Motor RPM	1420 min -1
Lubrication	Oil-Less
Tank Size	1.6 gal (6.2 L)
Weight	36 kg (79.4 lb)
Dimensions (L x H x W)	18-3/4" x 14-3/4" x 20" (476 x 375 x 507 mm)
Outlet Max Pressure "HP" (Exclusively for High Pressure Pneumatic Use)	2.6 MPa (26 bar)
Outlet Max Pressure "RP" (Exclusively for Regular Pressure Pneumatic Use)	0.9 MPa (9 bar)
Noise	L WA 90 dB

• Due to our continuing programme of research and development, the specifications herein are subject to change without notice.
• Note: Specifications may differ from country to country.

Read the Safety Guidelines and ALL instructions carefully before operating.

Symbols

The following show the symbols used for the equipment.
Be sure that you understand their meaning before use.

	Read instruction manual.
	Risk of electric shock. Before doing any work on the compressor it must be disconnected form the power supply.
	Risk of high temperatures. The compressor contains some parts which might reach high temperatures.
	Risk of accidental start-up. Attention, the compressor could start automatically in case of a black-out and subsequent reset.
	Wear safety glasses.
	Only for EU countries Do not dispose of electric equipment together with household waste material! In observance of European Directive 2002/96/EC on waste electrical and electronic equipment and its implementation in accordance with national law, electric equipment that have reached the end of their life must be collected separately and returned to an environmentally compatible recycling facility.

In observance of European Directive 2002/96/EC on waste electrical and electronic equipment and its implementation in accordance with national law, electric equipment that have reached the end of their life must be collected separately and returned to an environmentally compatible recycling facility.

IMPORTANT SAFETY INSTRUCTIONS

READ AND UNDERSTAND ALL INSTRUCTIONS
Failure to follow all instructions listed below may result in electric shock, fire, and/or serious injury.

SAVE THESE INSTRUCTIONS.

WORK AREA

1. Keep your work area clean and well lit. Cluttered and dark areas invite accidents.
2. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases, or dust. Power tools create sparks which may ignite the dust or fumes.
3. Keep bystanders, children, and visitors away while operating a power tool. Distractions can cause you to lose control. Protect others in the work area from debris such as chips and sparks. Provide barriers or shields as needed. Children should never be allowed in the work area.
4. The adequate room tempreture is +5°C to +30°C. (0°C to + 40°C at Maximum)

IMPROPER OPERATION OR MAINTENANCE OF THIS PRODUCT COULD RESULT IN SERIOUS INJURY AND PROPERTY DAMAGE.
READ AND UNDERSTAND ALL WARNINGS AND OPERATING INSTRUCTIONS BEFORE USING THIS EQUIPMENT.

Risk of Unsafe Operation WHAT CAN HAPPEN
Unsafe operation of your air compressor could lead to serious injury to you or others.

HOW TO PREVENT IT

• Review and understand all instructions and warnings in this manual.
• Become familiar with the operation and controls of the air compressor.
• Keep operating area clear of bystanders, pets and obstacles
• Keep children away from the air compressor at all times.
• Do not operate the product when fatigued or under the influence of alcohol or drugs. Stay alert at all times.
• Never defeat the safety features of this product.
• Do not operate machine with missing, broken, or unauthorised parts.

Risk of Air Tank Bursting

WHAT CAN HAPPEN
The following conditions could lead to a weakening of the tank, and RESULT IN A VIOLENT TANK EXPLOSION RESULTING IN SERIOUS INJURY TO YOU OR OTHERS:

• Failure to properly drain condensed water from the tank, causing rust and thinning of the tank wall.
• Modifications or attempted repairs to the tank.
• Unauthorised modifications to the pressure switch, safety valve, or any other components, which control tank pressure.

HOW TO PREVENT IT

• Drain air tank daily or after each use. If air tank develops a leak, replace it immediately with a new tank or replace the entire compressor.
• Do not drill into, weld or otherwise modify air tank or it will weaken. The tank can rupture or explode. Replace with a new air tank.
• Follow the equipment manufacturers recommendation and never exceed the maximum allowable pressure rating of attachments. Never use the compressor to inflate small low-pressure objects such as children's toys, footballs, basketballs, etc.

Risk of Attachments and Accessories Bursting

WHAT CAN HAPPEN
Exceeding the pressure rating of air tools, spray guns, air operated accessories, tyres AND other inflatables can cause them to explode or fly apart, and could result in serious injury to you and others.

Risk of Electric Shock

WHAT CAN HAPPEN

• Your air compressor is powered by electricity. Like any other electrically powered device, if it is not used properly, it may cause electrical shock.
• Electrical grounding: failure to provide adequate grounding to this product could increase the risk of electric shock.

HOW TO PREVENT IT

• Any electrical wiring or repairs required to this product should be performed by qualified service personnel or a qualified electrician, in accordance with national and local electrical codes.
• Make certain that the electrical circuit to which the compressor is connected provides proper electrical grounding, correct voltage, and adequate fuse protection.
• Never operate the compressor outdoors when it is raining, or in a wet environment.
• Never operate the compressor with guards or covers which are damaged or removed.

Risk of Explosion or Fire

WHAT CAN HAPPEN
It is normal for electrical contacts within the motor and pressure switch to spark, whenever the compressor starts or stops. Never operate the compressor in an atmosphere where flammable vapours are present. Doing so can result in serious injury to you or others.

HOW TO PREVENT IT

• Always operate the compressor in a well-ventilated area, free of gasoline or solvent vapours.
• If spraying flammable materials, locate compressor at least 6.1 m away from spray area.
• Store flammable materials in a secure location away from compressor.

Risk to Breathing

WHAT CAN HAPPEN

• The compressed air from your compressor is not safe for breathing.
  The air stream may contain carbon monoxide or other vapours, or particles from the tank or other components.
• Sprayed materials such as paint, paint solvents, paint remover, insecticides, weed killers, etc., contain harmful vapors and poisons.
• Breathing compressor or sprayed materials vapor can result in serious injury.

HOW TO PREVENT IT

• Never inhale air from the compressor, either directly or from a breathing device connected to the compressor. Work in an area equipped with good cross ventilation.
• Read and follow the safety instructions provided on the label or safety data sheet for the material you are spraying.
  Use an approved respirator designed for use with your specific application.

Risk from Noise

Risk from Compressed Air

WHAT CAN HAPPEN
The compressed air stream can cause soft tissue damage, and can propel dirt, chips, loose particles and small objects at high speed, resulting in property damage or personal injury.

HOW TO PREVENT IT

• Always wear approved safety glasses with side shields when using or maintaining the compressor.
• Never point any nozzle or sprayer toward any part of the body or at other people or animals.
• Always turn the compressor off and bleed pressure from the air line before attempting maintenance, attaching tools or accessories.

Risk from Moving Parts

WHAT CAN HAPPEN
The compressor cycles automatically when the pressure switch is in the on/auto position. If you attempt repair or maintenance while the compressor is operating or plugged in, you can expose yourself to moving parts. These moving parts can cause serious injury.

HOW TO PREVENT IT

• Always unplug the compressor and release air pressure from the tank and any attachments before attempting any maintenance or repair.
• Never operate the compressor with guards or covers which are damaged or removed.
• Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewellery, or long hair can be caught in moving parts.
• Air vents may cover moving parts and should be avoided as well.

Risk of Burn

Do not operate the portable compressor with the doors or enclosures open!

Do not open the cock before the air hose is attached!

WHAT CAN HAPPEN
Contact with hot parts such as the compressor head or outlet tubes could result in a serious skin burn.

HOW TO PREVENT IT

• Never touch hot components during or immediately after operation of the compressor. Do not reach around protective shrouds or attempt maintenance until unit has been allowed to cool.
• The handling and lifting: hold the handle only when move or transport the compressor.
• To avoid injuring, do not touch the cylinder, cylinder head or exhaust hose and other over-heated parts when the compressor is in use or shuts off within one hour.

Transport

1. The maximum bevel during traction is at least 30°.
2. Do not apply vehicles for traction.
3. Do not place compressor under inflammable, explosive or erosive service.

GLOSSARY

CFM: Cubic feet per minute.
SCFM: Standard cubic feet per minute; a unit of measure of air delivery.
PSIG: Pounds per square inch gauge; a unit of measure of pressure.
CUT-IN PRESSURE: While the motor is off, air tank pressure drops as you continue to use your accessory or air tool. When the tank pressure drops to a certain level the motor will restart automatically. This is called "cut-in pressure".
CUT-OUT PRESSURE: When you turn on your air compressor, it begins to run, air pressure in the air tank begins to build. It builds to a certain pressure before the motor automatically shuts off - protecting your air tank from pressure higher than its design rating. The pressure at which the motor shuts off is called "cut-out pressure".

DUTY CYCLE

All Makita manufactured air compressors are recommended to be operated at no more than a 50% duty cycle. This means an air compressor that pumps air more than 50% of one hour is considered misuse because the air compressor is undersized for the required air demand.

GENERAL INFORMATION

This air compressor is equipped with an Oil-Less pump designed for durability and no maintenance.
The compressor can be used for properly rated pneumatic nailers and staplers. An air pressure regulator is supplied for these applications.

Never use compressor for applications other than to operate a properly rated nailer or stapler. Use of the compressor for other applications could result in property damage and personal injury.
Separate air filter regulators combine the functions of air regulation and/or moisture and dirt removal should be used where applicable.

ON-RECEIPT INSPECTION

Each air compressor outfit is carefully tested and checked before shipment. With improper handling, damage may result in transit and cause problems with compressor operation.

Immediately upon arrival, check equipment for both concealed and visible damages to avoid expenses being incurred to correct such problems. This should be done regardless of any visible signs of damage to the shipping container. If this product was shipped directly to you, report any damages to the carrier and arrange for inspection of goods immediately.

STORAGE

Before you store the air compressor, make sure you do the following:

1. Review the "Maintenance" and "Operating Procedures" sections and perform maintenance as necessary. Be sure to drain water from the air tank.
2. Protect the electrical cord and air hose from damage (such as being stepped on or run over).

Store the air compressor in a clean and dry location.

DESCRIPTION OF OPERATION

DRAIN VALVE: The drain valve is located at the bottom of the air tank and is used to drain condensation from the tank at the end of each use or daily.

THERMAL CIRCUIT BREAKER

The electric motor has a manual reset thermal circuit breaker. If the motor overheats for any reason, the circuit breaker will shut off the motor. Turn pressure switch to the "off" position and wait for unit to cool before pushing the reset button and restarting the compressor.

MOTOR THERMAL OVERLOAD PROTECTOR

When the current rating of the motor is exceeded the thermo-protector will open and shut off the motor automatically.
The motor must be allowed to cool down before restarting. The compressor will automatically restart after the motor has cooled down.

ON/AUTO - OFF SWITCH

Turn this switch to "on" to provide automatic power to the pressure switch and to "off" to remove power when finished using the compressor or when compressor will be left unattended.

AIR INTAKE FILTER

This filter is designed to clean air coming into the compressor pump. This filter must always be clean and free from obstructions. See "Maintenance".

AIR COMPRESSOR PUMP:
To compress air, the piston moves up and down in the cylinder. On the down stroke, air is drawn in through the air intake valve. The exhaust valve remains closed. On the upstroke of the piston, air is compressed. The intake valve closes and compressed air is forced out through the exhaust valve, through the outlet tube, through the check valve and into the air tank. Useable air is not available until the compressor has raised the air tank pressure above that required at the air outlet.

CHECK VALVE:
When the air compressor is operating, the check valve is "open", allowing compressed air to enter the air tank. When the air compressor reaches "cut-out" pressure, the check valve "closes", allowing air pressure to remain inside the air tank.

PRESSURE SWITCH UNLOADING VALVE:
The pressure switch unloading valve located on the side of the pressure switch, is designed to automatically release compressed air from the compressor head and the outlet tube when the air compressor reaches "cut-out" pressure.

PRESSURE SWITCH:
The pressure switch automatically starts the motor when the air tank pressure drops to the factory set "cut-in" pressure. It stops the motor when the air tank pressure reaches the factory set "cut-out" pressure.

SAFETY VALVE:
If the pressure switch does not shut off the air compressor at its "cut-out" pressure setting, the safety valve will protect against high pressure by "popping out" at its factory set pressure which is slightly higher than the pressure switch "cut-out" setting.

OUTLET PRESSURE GAUGE:
The outlet pressure gauge indicates the air pressure available at the outlet side of the regulator. This pressure is controlled by the regulator and is always less or equal to the tank pressure. See "Operating Procedures".

TANK PRESSURE GAUGE:
The tank pressure gauge indicates the air pressure in the tank.

REGULATOR:
The air pressure coming from the air tank is controlled by the regulator knob. Turn the knob clockwise to increase pressure and counter-clockwise to decrease pressure. To avoid minor re-adjustment after making a change in pressure setting, always approach the desired pressure from a lower pressure. When reducing from a higher to a lower setting, first reduce the pressure less than the desired pressure. Depending on the air requirements of each particular accessory, the outlet regulated air pressure may have to be adjusted while you are operating the accessory.

COMPRESSED AIR OUTLET; "HP" marking
For High Pressure Pneumatic Tool Exclusive Use Outlet Max Pressure; 2.6 MPa (26 bar)

COMPRESSED AIR OUTLET; "RP" marking
For Regular Pressure Pneumatic Tool Use Outlet Max Pressure; 0.9 MPa (9 bar)

INSTALLATION AND BREAK-IN PROCEDURES

LOCATION OF THE AIR COMPRESSOR

Locate the air compressor in a clean, dry and wellventilated area. The air filter must be kept clear of obstructions, which could reduce air delivery of the air compressor. The air compressor should be located at least 0.3 m away from the wall or other obstructions that would interfere with the flow of air. The air compressor head and shroud are designed to allow for proper cooling. If humidity is high, an air filter can be installed on the air outlet adapter to remove excessive moisture. Follow the instructions packaged with the air filter for proper installation.

Place the air compressor on a level surface so that it rests securely on the rubber feet.

LUBRICATION

This air compressor is equipped with an Oil-Less pump designed for durability and no maintenance.

Power supply

Operate the compressor at voltages specified on the nameplate, the allowable tolerance range must remain within ±5%. If using the compressor at a higher voltage than the rated voltage, it will result in abnormally fast motor speed and may damage the unit and burn out the motor.

Extension Cords

To avoid voltage drop, power loss, and overheating of the motor, use extra air hose instead of an extension cord. Low voltage can cause damage to the motor.

If an extension cord must be used:

• Make sure the extension cord is in good condition.

Please see the chart below for the MINIMUM extension cord gauge requirements:

	Total Length of Cord in Meter
Amp Rating Range (220 - 240 V)	10 m 25 ft.	15 m 50 ft.	20 m 75 ft.	30 m 100 ft.	50 m 150 ft.	60 m 200 ft.
0 - 5 A	1.5 mm2	1.5 mm2	1.5 mm2	2.5 mm2	4 mm2	4 mm2
5.1 - 8 A	1.5 mm2	1.5 mm2	1.5 mm2	4 mm2	4 mm2	4 mm2
8 - 12 A	2.5 mm2	2.5 mm2	4 mm2	Not Recommended

Piping

Plastic or PVC pipe is not designed for use with compressed air. Regardless of its indicated pressure rating, plastic pipe can burst from air pressure. Use only metal pipe for air distribution lines. If a pipe line is necessary, use pipe that is the same size, or larger than, the air tank outlet. Piping that is too small will restrict the flow of air. If piping is over 100 feet long, use the next larger size. Bury underground lines below the frost line and avoid pockets where condensation can gather and freeze. Apply pressure before underground lines are covered to make sure all pipe joints are free of leaks.

Improper grounding can result in electrical shock. Do not modify the plug that has been provided. If it does not fit the available outlet, the correct outlet should be installed by a qualified electrician.

OPERATING PROCEDURES

Daily Start-up Checklist

CONNECTING HOSES

Risk of unsafe operation. Firmly grasp hose in hand when installing or disconnecting to prevent hose whip.
Losing control of the hose may result in personal injury and property damage.

1. Before attaching air hose or accessories, make sure the pressure switch lever is set to "OFF" and the air regulator or shut-off valve is closed. Ensure compressor is disconnected from the mains supply.
2. Attach hose and accessories. Too much air pressure causes a hazardous risk of bursting. Check the manufacturer's maximum pressure rating for air tools and accessories. The regulator outlet pressure must never exceed the maximum pressure rating.
3. Turn the pressure switch lever to "ON/AUTO" and allow tank pressure to build. Motor will stop when tank pressure reaches "cut-out" pressure.
4. Open the regulator by turning it clockwise. Adjust the regulator to the correct pressure setting. Your compressor is ready for use.
5. Always operate the air compressor in well-ventilated areas; free of gasoline or other solvent vapors. Do not operate the compressor near the spray area.

When you are finished:

DISCONNECTING HOSES

Risk of unsafe operation. Firmly grasp hose in hand when installing or disconnecting to prevent hose whip.
Losing control of the hose may result in personal injury and property damage.

6. Set the pressure switch lever to "OFF". Ensure compressor is disconnected from the mains supply.
7. Using the air tool or accessory, bleed the tank pressure down to zero.
8. Remove the air tool or accessory.
9. Drain water from air tank by opening drain cock valve on bottom of tank. WATER WILL CONDENSE IN THE AIR TANK. IF NOT DRAINED, WATER WILL CORRODE AND WEAKEN THE AIR TANK CAUSING A RISK OF AIR TANK RUPTURE.

Note:
If drain valve is plugged, release all air pressure. The valve can then be removed, cleaned, then reinstalled.

10. After the water has been drained, close the drain valve. The air compressor can now be stored.

Drain Air Tank Properly. Improper draining of the air tank can result in corrosion and possible bursting of the tank. Tank bursting could lead to personal injury and property damage.

MAINTENANCE

Never use the air compressor which is operating abnormally. If the air compressor appears to be operating unusually, making strange noises or vibration, stop using it immediately and arrange for repairs by a Makita authorized service center.

Use only genuine Makita replacement parts. Replacement parts not manufactured by Makita may void your warranty and can lead to malfunction and result in injuries. Genuine Makita parts are available from an authorized dealer.

UNIT CYCLES AUTOMATICALLY WHEN POWER IS ON. WHEN DOING MAINTENANCE, YOU MAY BE EXPOSED TO VOLTAGE SOURCES, COMPRESSED AIR OR MOVING PARTS. PERSONAL INJURIES CAN OCCUR. BEFORE PERFORMING ANY MAINTENANCE OR REPAIR, UNPLUG THE COMPRESSOR AND BLEED OFF ALL AIR PRESSURE.

To ensure efficient operation and longer life of the air compressor unit, a routine maintenance schedule should be prepared and followed. The following routine maintenance schedule is geared to a unit in a normal working environment operating on a daily basis. If necessary, the schedule should be modified to suit the conditions under which your compressor is used. The modifications will depend upon the hours of operation and the working environment. Compressor units in an extremely dirty and/or hostile environment will require a greater frequency of all maintenance checks.

ROUTINE MAINTENANCE SCHEDULE

1. Drain water from the air tank, any moisture separators or air filter regulators.
2. Check for any unusual noise and/or vibration.
3. Manually check all safety valves to make sure they are operating properly.

Risk of bursting.
Check Safety Valve. If safety valve does not operate properly over pressurization of the air tank may result in rupture or explosion causing personal injury and property damage.

4. Inspect air filter, replace if necessary.
5. Inspect air lines and fittings for leaks; correct as necessary. Each year of operation or if a problem is suspected:
   • Check condition of air compressor pump intake and exhaust valves.
   • Check condition of check valve. Replace if damaged or worn out.
6. Keep all screws, bolts, and covers properly tightened. Check their conditions periodically.

Keep All Screws, Bolts and Covers Properly Tightened. If screws, plates or covers become loose personal injury or property damage may occur.

TROUBLE SHOOTING

PROBLEM	CAUSE	CORRECTION
Will not start	Fuse blown or circuit breaker tripped; Loose electrical connections; Extension cord not correct; Overheated motor	Check for cause and replace or reset; Check wiring connections Max.15m/50ft., min. 14ga; Use reset button/wait for automatic reset
Low pressure	Air leak in safety valve Restricted air filter Defective check valve	Check valve manually: pull up ward on rings. If condition persists, replace valve; Clean or replace air filter; Replace check valve.
Safety valve releasing	Defective pressure switch or improper adjustment	Check for proper adjustment and if problem persists, replace pressure switch

Daily maintenance

1. Before each use:
   1. Be sure all nuts and bolts are tight.
   2. Check for unusual noise or vibration.
2. After each use:
   Exhaust all the air in the air storage tank. Open the drain cock at the bottom of the air storage tank to drain condensation from tank.
3. Weekly maintenance:
   1. Check performance of safety valve.
   2. Check the air switch the designed rated pressure is 2.8 Mpa.
   3. Clean the air filter.
4. Monthly maintenance:
   1. Inspect air system for leaks by applying soapy water to all joints. Tighten those joints if leakage is observed.
   2. Check that all nuts and bolts stay tight.
   3. Replace the air filter with a new one.
   4. Clean surface of air compressor.
5. Quarterly maintenance:
   1. Check the cylinder and piston see to if wore.