Ironton 20 Gallon Oil-Free Electric Air Compressor Owner's Manual

Model # AC1221

Thank You for Choosing Ironton®

For future reference, complete the owner's record below:

Serial Number/Lot Date Code: _________________________

Purchase Date: _________________________

Save the receipt, warranty, and this manual. Read the entire manual to become familiar with this product before using it. This air compressor is designed for certain applications only. Northern Tool and Equipment is not responsible for issues arising from modification or improper use of this product such as an application for which it was not designed. Northern Tool and Equipment strongly recommend that this product not be modified or used for any application other than for which it was designed. For technical questions, call 1-800-222-5381.

Contents

Intended Use

The Ironton® 20 Gallon Electric Oil-Free Air Compressor is ideal for inflating tires, air mattresses, pool toys, and sports balls. The air compressor can be used for operating pneumatic tools including: air nailers, impact wrenches, air ratchets, drills, and cutting tools. It's perfect for medium to heavy automotive, farm, and shop-type applications. It features:

Packaging Contents

Technical Specifications

PropertySpecification
ModelAC1212
Lubrication TypeOil-free
Running Horsepower1.5
Voltage120
Hz-Single Phase60
Minimum Branch Circuit Requirement15 Amps
Fuse TypeTime Delay
Air Tank Capacity (Vertical)20 gallons (75.7 liters)
Motor Speed3,400 RPM
Maximum Operating Air Pressure125 psi
Maximum Tank Air Pressure150 psi
CFM @ 40 psi4.18
CFM @ 90 psi2.31
Fill Time: 0 psi To 40 psi1 Minute + 47 Seconds
Fill Time: 0 psi To 90 psi6 Minutes + 47 Seconds
Fill Time: 0 psi To 125 psi10 Minutes + 35 Seconds
Recovery Time: 90 - 125 psi3 Minutes + 28 Seconds
Cut In Operating Pressure90 psi
Cut Out Operating Pressure125 psi
Packaging Dimensions18" x 18" x 43.5"
Item Dimensions (Inches)24.4" x 20" x 41"
Tank Dimensions24.6" Height x 15.16" Diameter
Watts At Cut Out / Amps At Cut Out565 W / 5.3 A
Wheel Diameter8"
Item Weight / Ship Weight72.5 lbs / 78 lbs

Safety Signal Words

The definitions below describe the level of severity for each signal word. Please read the manual and pay attention to the following.

DANGER: Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury.
WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.
NOTICE: Indicates important information, that if not followed, may cause damage to equipment.

Important Safety Information

Prop 65

This product can expose you to chemicals including DEHP, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Work Area Safety

WARNING

Personal Safety

WARNING

Air Compressor Use And Care

CAUTION

Specific Operation Warnings

Air Tool Cautions

CAUTION

Power Source Connection

Power Requirements

This tool is designed to operate on a properly grounded 120 volt, 60 Hz, single phase alternating current (AC) power source fused with a 15 amp time delayed circuit breaker. It is recommended that a qualified electrician verify the ACTUAL VOLTAGE at the receptacle into which the tool will be plugged and confirm that the receptacle is properly grounded. The use of the proper circuit size can eliminate nuisance circuit breaker tripping when using your tool. Improper performance, and/or, damage to the tool will result if operated on inadequate, or excessive power.

CAUTION: DO NOT OPERATE THIS TOOL if the ACTUAL power source voltage is less than 105 volts AC or greater than 132 volts AC.

Grounding

Grounded Tools: Tools with 3-Prong Plugs

Tools marked with "Grounding Required" have a 3-wire cord and 3-prong grounding plug. The plug must be connected to a properly grounded outlet. If the tool should electrically malfunction or break down, grounding provides a low resistance path to carry electricity away from the user, reducing the risk of electric shock. The grounding prong in the plug is connected through the green wire inside the cord to the grounding system in the tool. The green wire in the cord must be the only wire connected to the tool's grounding system and must never be attached to an electrically live terminal. Your tool must be plugged into an appropriate outlet, properly installed and grounded in accordance with all codes and ordinances. The plug and outlet should look like those with a standard 3-prong configuration (one round ground pin, two flat power pins).

Extension Cords

Minimum Wire Size of Extension Cords

Nameplate AMPSCord Length
25'50'100'150'
0-1018 AWG16 AWG16 AWG14 AWG
10-1216 AWG16 AWG14 AWG12 AWG
12-1614 AWG12 AWGNOT RECOMMENDED

Main Parts Description

The air compressor consists of several key components:

LabelPart NameDescription
APower SwitchControls power to the motor and cut-in/cut-out pressure settings. Serves as Auto-On/Off positions.
BTool Pressure GaugeIndicates outgoing air pressure to the tool, controlled by the regulator.
CTank Pressure GaugeIndicates reserve air pressure in the tank.
DTank Safety ValveAllows excess tank pressure to escape into atmosphere. Opens only when tank pressure is above maximum rated pressure.
ERegulatorControls air pressure from the tank. Turn knob clockwise to increase, counter-clockwise to decrease.
FTank Drain ValveDrains condensation from the tank, located at bottom.
GAir Intake FilterProvides clean air to the pump; must be kept free of debris. Check daily.
HCheck ValveRetains air pressure inside the tank when pump is not operating.
IQuick ConnectOffers quick release for attaching/removing air hose.
JOutlet TubeTransfers pressurized air from pump to tank.
KHandleFor transportability.
LHandle BoltsAllows attachment/removal of handle for storage.
MWheelsAllow easy portability.
NRubber FootProvides anti-vibration and stability.
OAir Tank20 gallons (75.7 liters) capacity.

Visual description of the main parts: The air compressor is a vertical tank unit with two wheels at the base (M) and a rubber foot (N) for stability. A handle (K) is attached at the top for portability. On the top section of the tank, there's the main compressor unit. Visible components include the Power Switch (A), Tool Pressure Gauge (B), Tank Pressure Gauge (C), Tank Safety Valve (D), Regulator (E), Air Intake Filter (G), Check Valve (H), Quick Connect (I), and Outlet Tube (J). The Tank Drain Valve (F) is located at the very bottom of the tank.

Further Functional Information

TANK SAFETY VALVE

The safety valve automatically relieves pressure from the air tank in the event of excessive pressure build up. It is preset at the factory. Do not attempt to make any adjustments to the safety valve. Periodically pull the ring on the safety valve end to check that it is working properly.

PRESSURE

Controlled by the red-tipped power switch which turns the air compressor on and off. When the switch is pulled up to the "Auto / On" position, the pressure switch is engaged and will start the compressor pump automatically when tank pressure is below the factory-set minimum. The pressure switch continues to monitor the pressure and turns the pump off when the pressure reaches the factory-set maximum. Compressor is turned on when pushed down, the pump is off.

NOTICE: Always make sure that the compressor power switch is in the OFF position before performing any maintenance or plugging the compressor into a power supply.

TANK DRAIN VALVE

(located on bottom of tank) - The tank drain valve can be opened to allow moisture and compressed air to be released from the air tank.

WARNING: The tank drain valve should always be opened slowly to avoid damage to equipment and possible injury.

Getting Started

  1. Unpack the air compressor.
  2. Inspect the unit for damage. If the unit has been damaged in transit, contact the carrier and complete a damage claim immediately due to time limitations.
  3. Check the compressor's serial label to ensure you have received the model ordered, and that it has the required pressure rating for its intended use.
  4. Before operating your tool, check the contents of the box to make sure you have everything you will need. Items included: Air Compressor, Handle and bolts, 2 Wheels, washers and nuts, Owner's Manual.
NOTICE: Save packaging in case you need to return the compressor for servicing or repair.

Assembly

NOTICE: Before performing any assembly or maintenance, make sure compressor is turned off and unplugged from the power supply.

Place compressor on level ground. It is designed to function properly at an incline of no greater than 15 degrees.

Pre-Operation

Before operating your air compressor:

General Overview

Installation and Location

Locate the compressor according to the following guidelines:

  1. Position the compressor near a grounded electrical outlet.
  2. The compressor must be at least 12 to 18 inches (31 - 45 cm) from any wall or obstruction which would interfere with airflow, in a clean, well-ventilated area, to ensure sufficient air flow and cooling.
  3. In cold climates, store portable compressors in a heated building when not in use; a temperature-controlled area between 32° and 95° Fahrenheit (0° and 35 °C). This will reduce problems with the motor starting and freezing from water condensation.
  4. Remove the compressor from the carton and place it on the floor or a hard, level surface. The compressor must be level to ensure proper drainage of the moisture in the tank.
  5. The compressor is designed with heat dissipation fins which allow for proper cooling. Keep the fins (and all other parts which collect dust or dirt) clean. A clean compressor runs cooler and provides longer service. Do not place rags, containers or other material on top of the compressor. The air filter intake should be free of any debris or obstructions. Check the air filter on a daily basis to make sure it is clean and in working order.

Before Each Use

WARNING

DUTY CYCLE: This air compressor pump is capable of running continuously. To prolong the life of your air compressor, it is recommended that a 50%-75% average duty cycle be maintained; that is, the air compressor pump should not run more than 30-45 minutes in any given hour.

Accessories

Accessories for this unit are sold separately.

Attaching an air hose

Your air compressor is supplied with a 1/4" push-connect air coupler. With a factory-installed air coupler, your compressor is ready to accept air hoses equipped with 1/4" male air connectors.

NOTICE: Use only air hoses rated for use with 150 psi air pressure or higher.

To install any air hose equipped with a 1/4" male connector:

  1. Simply push the "connector" or "plug" into the fitting and it automatically engages.
  2. Verify that air hose is securely connected to air coupler by pulling on the air hose.

Visual description of air coupler and hose connection: A close-up view shows a quick-connect air coupler with a male air hose connector being inserted. The coupler has a collar that slides back to release the connection and forward to lock it in place, ensuring an airtight seal.

Operating Instructions

WARNING: Risk of bursting. If any unusual noise or vibration is noticed, stop the compressor immediately and have it checked by a trained service technician.

Daily start-up

  1. Set the Power Switch to the OFF (0) position.
  2. Inspect the air compressor, air hose, and any accessories/tools being used for damage or obstruction. If any of these mentioned items need repair/replacement, contact the local authorized dealer before use.
  3. Close the drain valve.

Drain Valve

Visual description of drain valve: A close-up view shows the drain valve located at the bottom of the air tank. It appears as a small brass valve with a handle that can be turned to open or close it, allowing condensation and air to be released.

Pressure Switch

  1. Check that the red pressure switch button is pushed down to the OFF position.
  2. Ensure that the power supply you are going to use is operating normally.
  3. Insert the power supply cord into the power supply socket.
  4. Turn the pressure switch on, pulling the red button up to the ON position.
  5. On the tank pressure gauge, watch pressure build in the tank until the pump stops at the factory-set pressure, about 115 to 125 psi.
  6. This first time running your compressor and periodically thereafter, check for air leaks. If the gauge indicates pressure is going down in the tank or you hear leakage, apply soapy water to all joints in the air transport piping. Tighten these joints if bubbles form.

Visual description of pressure switch: A close-up view shows the red pressure switch button on top of the compressor unit. It has "ON" and "OFF" markings, indicating its function to control the compressor's operation.

Adjusting the air pressure

Your air compressor is supplied with an air pressure regulator. This regulator adjusts the air pressure supplied to the tools through the hose.

Visual description of regulator and gauges: A close-up view shows the regulator knob (E) and the outlet pressure gauge (B) on the compressor. The regulator knob is typically large and rotatable, allowing for easy adjustment of the output air pressure, which is then displayed on the gauge.

Shutting off your compressor

  1. Push the red pressure switch button down to the OFF position.
  2. Unplug the compressor from the electrical power.
  3. If not draining the tank, reduce tank pressure through the air hose.
  4. Drain the tank by slowly opening the drain valve. Place a catch basin under the valve to protect the surface from water damage.

Cold Weather Starting

Temperatures below freezing (32 °F / 0 °C) cause the metal parts of your air compressor to contract and that makes starting more difficult. To assist the air compressor in starting in cold weather, follow these tips:

  1. Try to keep the air compressor stored in temperatures above 32 °F (0 °C).
  2. Open the air tank drain valve and release all air pressure from the air tank before attempting to start in cold weather. (After air is released from air tank, close drain valve.)
  3. Pull the ring on the safety valve before each use to make sure the valve is functional.
  4. Plug the air compressor directly into a 120 volt electrical outlet. Do not use an extension cord when starting your air compressor in cold weather.

After Each Use

WARNING

Daily shut-down

  1. Set the Power Switch to the OFF (0) position.
  2. Unplug the power cord from the receptacle.
  3. Set the outlet pressure to zero on the regulator.
  4. Remove any air tools or accessories.
  5. Open the drain valve allowing air to bleed from the tank. After all of the air has bled from the tank, close the drain valve to prevent debris build-up in the valve.

Maintenance

NOTICE: To ensure efficient operation and longer life of the air compressor unit, a routine maintenance schedule should be followed. The following schedule is geared toward a consumer whose compressor is used in a normal working environment on a daily basis.
WARNING

Checking the Safety Valve

Check the safety valve by performing these three steps:

  1. Plug the compressor in and run until shut-off pressure is reached.
  2. Wearing safety glasses and hearing protection, pull out on the safety valve ring to release pressure from the tank.
  3. The safety valve should close automatically at approximately 40-50 psi. If the safety valve does not allow air to be released when you pull out on the ring, or does not close automatically, it must be replaced.

Visual description of safety valve: A close-up view shows the safety valve, typically a brass component with a pull-ring, located on the air tank. It is designed to release pressure when pulled, and automatically close at a certain pressure threshold.

Storage

To store the air compressor, be sure to do the following:

  1. Turn the unit off and unplug the power cord from the receptacle.
  2. Remove all air hoses, accessories, and air tools from the air compressor.
  3. Perform the daily maintenance schedule.
  4. Open the drain valve to bleed all air from the tank.
  5. Close the drain valve.
  6. Protect the electrical cord and air hose from damage (such as being stepped on or run over). Wind them loosely around the compressor handle.
  7. Store the air compressor in a clean, cool, dry, safe, and indoor location.

Troubleshooting

Always inspect the compressor before use, and make sure it is in good working condition. Make sure all air vents are clear. Check the power cable to make sure it is intact and free from cracks, bare wires etc. Avoid using solvents when cleaning plastic parts, most plastics are susceptible to damage from the various types of commercial solvents.

TroublePossible CauseCorrective Action
Compressor will not start1. Blown fuse or circuit breaker tripped
2. Loose electrical connections
1. Replace or reset fuse/circuit breaker
2. Check wiring connections
Low pressure1. Restricted air filter
2. Defective check valve
3. Air leak in safety valve
1. Replace air filter
2. Replace check valve
3. Check valve by pulling on ring. If condition persists, replace valve
Safety valve releasesDefective pressure switchReplace pressure switch
Pressure in tank falls1. Air leaks at joints1. Allow the compressor to build pressure in the tank, to the max pressure if possible. Spray or brush soapy water on all air connections and look for bubbles. Tighten leaky connections. Do not over-tighten.
2. If the problem continues, contact customer support for further advice.
Unloader valve leaks when pump is not runningUnloader valve seal defectiveAllow air in the air tank out until all pressure is released. Remove the unloader valve plug and clean the valve seal. If damaged, replace seal and re-install.
Compressor stopped and will not re-start1. Thermal overload protector has engaged due to motor overheating
2. Motor windings burn-out
1. Check that the main supplied voltage corresponds to the compressor specifications. An inadequate extension cord (too thin or too long) can cause the motor to overheat due to voltage drop. Excessive use (over 1 hour continuous) can cause motor overheating. Allow the motor to cool down.
2. Contact customer support
Motor does not start and makes a humming soundCapacitor burn-outContact customer support
Motor does not start or starts slowlyLow voltage electrical supply to motorCheck that the main supplied voltage corresponds to the compressor specifications. An inadequate extension cord (too thin or too long) can cause the motor to overheat due to voltage drop. Check power quality at outlet
Compressor runs noisily and metallic sounds are heardHead gasket or reed valve damaged.Stop the compressor and contact customer support
Compressor doesn't provide as much air as when new and/or cuts off after a much shorter time period.1. Tank has reduced capacity due to water retention
2. Pressure switch is out of adjustment
1. Open drain valve to release water
2. Contact customer support
Pump unit does not stop when the tank reaches maximum working pressure.Defective or pressure switch out of adjustmentStop the compressor immediately (risk of explosion) and contact customer support

For technical questions, please call 1-800-222-5381.

Warranty

Two year limited warranty

Distributed by Northern Tool + Equipment Co., Inc. Burnsville, Minnesota 55306. NorthernTool.com. Made in Vietnam.

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