Ingersoll-Rand 3000 Operation, Intermittent Duty Formula, START-UP Electric Motor Driven Models

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OPERATION

INTERMITTENT DUTY FORMULA ______________________

Units operating above 200 PSIG are to be operated according to the "Intermittent Duty Formula."

INTERMITTENT DUTY FORMULA

Pump-up time should not ordinarily exceed thirty (30) minutes or be less than ten (10) minutes. Shutdown periods between cycles of operation should be at least equal to the pump-up time. Note: When the compressor is regulated by constant speed control, the shutdown period is the time the compressor is operating unloaded.

A pump-up time limit with the following cool-down period is recommended to protect the valves and heads against stabilized high operating temperatures, which could rapidly build up carbon in these areas.

All inquiries for high-pressure compressor application where the "use" cycle differs from the "Intermittent Duty Formula" should be referred to Ingersoll-Rand.

START-UP (ELECTRIC MOTOR DRIVEN MODELS) _______

1.Close the service valve.

2.Release any remaining tank pressure by slowly opening the manual drain valve.

3.Close the manual drain valve and apply power to the compressor. If the pressure switch is equipped with an “ON/AUTO-OFF” lever, flip the switch to the “ON/AUTO” position. If the unit is equipped with a control panel “ON/OFF” switch, move the switch to the “ON” position.

Typical Pressure Switch Lever (If Equipped)

4.Slowly open the service valve.

Typical Service Valve (A = Open, B = Closed)

•CAUTION	Unusual noise or vibration indicates a problem. Do
	not continue to operate until you identify and
	correct the source of the problem.
NOTE	Ensure the direction of rotation is correct per the
	arrow on the motor. If the rotation is incorrect on
	three-phase units, interchange any two of the three
	leads.

START-UP (GASOLINE ENGINE UNITS) _________________

•WARNING Do not operate gasoline engine units in an enclosed area.

1.Release any remaining tank pressure by slowly opening the manual drain valve.

2.Turn on the engine gasoline supply.

3.Put the choke in the “on” position.

4.Close the service valve and put the unloader lever in the “unload”

(A) position for Kawasaki and Honda engine driven models, or the “load” (B) position for Kohler engine driven models.

5.Start the engine, release the choke, and allow the engine to warm up for two to three minutes.

6.Return the unloader lever to the “load” (B) position on Kawasaki and Honda engine driven models.

Typical Unloader (A = Unload, B = Load)

A

B

NOTE	Turn the gasoline supply off when the compressor
	is not being used.
NOTE	Some gasoline engine driven compressors require
	5-8 break-in hours of operation before reaching full
	capacity and speed.

COMPRESSOR CONTROLS ___________________________

AUTOMATIC START & STOP CONTROL. This type of control applies to electric motor driven models under 10 horsepower.

NOTE	Automatic Start & Stop Control is intended for use
	when the motor will start no more than 6 times per
	hour.

When the receiver tank pressure reaches the factory pre-set maximum pressure (usually 175 PSIG), the pressure switch stops the unit. When the receiver tank pressure drops below the factory pre-set minimum (usually 135 PSIG), the pressure switch resets and restarts the unit.

CONSTANT SPEED CONTROL. This type of control applies to gasoline engine units.

When the receiver tank pressure reaches the factory pre-set maximum pressure (usually 175 PSIG), the unloader slows down the engine and the unit stops pumping. When the receiver tank pressure drops to the factory pre-set minimum (usually 145 PSIG), the unloader resets, the engine returns to full speed, and the unit resumes pumping.

DUAL CONTROL. This type of control applies to electric motor units over 10 horsepower. Select either automatic start and stop control or constant speed control by adjusting the knob on the auxiliary valve. For automatic start and stop control, turn the knob on the auxiliary valve fully clockwise to disable the auxiliary valve. The pressure switch will then start and stop the unit.

NOTE	For dual control models, automatic start and stop is
	preferred.

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