Question about Ingersoll Rand Stationary Air Cooled Rotary Screw Compressor 10 Hp, 35 Cfm At 125 Psi, Model# Ep

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I have a SSR-EP60 air compressor and am having a problem with it unloading. It would shut off for high pressure (145). I changed the air piston to the intake butterfly and seems to be a little better. I have to leave a valve open and let air bleed out or it will shut down. It seem like it's not unloading all the way. Inlet valve opens and closes and cycles fine. Soon as we start to use less air it starts to climb until high pressure shutdown.

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If the pressure continues to rise, the inlet valve is not closing completely. Remove the top of the air cleaner box and look down at the inlet valve butterfly. When the compressor is down or unloaded, the valve should be held closed by an internal spring in the air cylinder. If it's not, the mounting stud on the bracket may have come loose and moved, or more likely the spring in the air cylinder actuator is broken.

This actuator has gone thru at least 3 revisions. I just replaced the cylinder on our EP60 because the spring had broken in two places and wouldn't come anywhere near closing the valve.

Posted on Jun 14, 2011

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I have SSR up series 15-30hp air copressor.The compressor will start and build pressure until the pressure gets to a certain reading on the gauge and the unloader valve begin to unload the air out. But the...


The compressor will run stop start or load unload. There is a switch for this. Make sure the right mode is selected.stop start for light use. Load unload for heavy. This mode keeps the starting and stopping to keep from burning up the motor. That is rated by stops per hour. They shouldnt be more than 10 times per hour

Dec 30, 2014 | Air Tools & Compressors

2 Answers

Pump is not shutting off, and pressure not building up


Hi Kendal

Here are a few things to check, you may have already checked some of these.

*Electricity...Compressors will run best with full 115Vot 15AMP/Or 220V electrical supply from a circuit, over the shortest electrical cord as possible.

*Air Leaks..Place your ear close to the compressor and listen for air leaking, if you hear air that is not normal and means you have to locate and repair whatever it is that is leaking.
*Check the air unloader valve... The air unloader valve will blown out air when you turned off the compressor, that is normal.
But it should not have air leaking out of it all of the time. If so then it is faulty and in need of repair/replacement.
*Valves...If either the intake or exaust valves fail, breaks, or fails to seat, then your compressor will run 24 hours a day and never build up to the correct pressure for shut-off.
*Gaskets...Check to see if your gaskets have failed.
You could have a gasket failure between the pistons and you will never know it because it shows no external air leak.
If this situation happens then the air will only cycle between cylinders and never build up the correct air pressure.
One way to check the gasket is remove the air filter, then put your hand over the intake.
If correct then it will **** you hand against the intake.
If the valve or valves have failed then you will feel the air sucking in and blowing out.
*Piston Rings and Cylinder...The piston rings could be stuck,broken, or worn and not allowing the correct pressure to build up in your tank.
A worn cylinder will also contribute to the problem of pressure build-up.
*Pressure Switch...Check for air leaks at the pressure switch, it has a rubber diaphram that can fail and leak air out of the system.
Please take time to rate me
Bud

Nov 01, 2012 | Campbell Hausfeld 26 - Gallon Air...

1 Answer

Ingersoll Rand 3 hp air compressor builds correct pressuse but trips rest when called to restart. Changed starter and running capasitors but no change in problem.


You need to check the head unloader.
Compressed air that is trapped over the piston when the compressor shuts off will be evacuated to atmosphere through the unloader valve, to prevent that compressed air pressure from adding load to the start up of the compressor motor, when the pressure switch again calls for air. For example, the last time you did a sit-up, you may have folded your arms over your chest, or if you are particularly masochistic : - ) , even held a weight to your chest. What you were doing is increasing the load against which your muscles have to work to effect the sit up.
Compressed air, captured in the cylinder after the compressor shuts off, would increase the load against which the electric motor would have to work. It may increase the load too much, and the motor may fail to start, or it may pull too many amps and fry a fuse or pop a breaker in the panel.
When the compressor shuts off, the unloader valve operates, it unloads the trapped air to atmosphere, and that problem is solved.
The unloader valve is plumbed somewhere in the line between the compressor and the compressor tank.
It is often part of the pressure switch assembly. It will, in many cases, be opened by the pressure switch, when the air in the compressor air tank reaches the set point and the pressure switch trips the power supply to the motor off, and at the same time, trips the unloader valve to open.

it is normaly on the bottom of the pressure switch it will have a small tube hooked to it



1_4_2012_7_59_34_pm.jpg

Jan 04, 2012 | Air Tools & Compressors

1 Answer

Compressor builds correct pressure but will trip rest before it can restart.


You need to check the head unloader.
Compressed air that is trapped over the piston when the compressor shuts off will be evacuated to atmosphere through the unloader valve, to prevent that compressed air pressure from adding load to the start up of the compressor motor, when the pressure switch again calls for air. For example, the last time you did a sit-up, you may have folded your arms over your chest, or if you are particularly masochistic : - ) , even held a weight to your chest. What you were doing is increasing the load against which your muscles have to work to effect the sit up.
Compressed air, captured in the cylinder after the compressor shuts off, would increase the load against which the electric motor would have to work. It may increase the load too much, and the motor may fail to start, or it may pull too many amps and fry a fuse or pop a breaker in the panel.
When the compressor shuts off, the unloader valve operates, it unloads the trapped air to atmosphere, and that problem is solved.
The unloader valve is plumbed somewhere in the line between the compressor and the compressor tank.
It is often part of the pressure switch assembly. It will, in many cases, be opened by the pressure switch, when the air in the compressor air tank reaches the set point and the pressure switch trips the power supply to the motor off, and at the same time, trips the unloader valve to open.

it is normaly on the bottom of the pressure switch it will have a small tube hooked to i

1_4_2012_8_01_50_pm.jpg

Jan 04, 2012 | Air Tools & Compressors

2 Answers

Ingersoll Rand SSR EP60 60hp Compressor w/ Intellisys 39817655 controller. Need to reset target pressure. What is the secret button sequence to access programming mode on this controller? I am aware of...


OK, Compressor should be shut down and showing (ready to start) in display. Press load/unload button once then press hidden right button within 3 seconds. This will let you access the set point program. It will include language, temperature and pressure, rated pressure,etc. Make sure you look at the data tag affixed to the unit and see what the rated pressure is for your unit. You can endanger yourself and equipment by over pressurizing the components of the compressor.

May 19, 2011 | Ingersoll Rand Stationary Air Cooled...

1 Answer

Compressor wont restart because of head pressure


Piston air compressors have to unload to permit a restart, the two mot common types are an unloader valve or free air unloaders.

with an unloader valve this system uses a check valve mounted in the discharge line as it enters the tank, when the pump stops this check closes and does not permit the tank pressure to return to the pump. a unloader valve also opens to allow air pressure in the discharge line to vent, this valve is either on the pressure switch or on some models is on the pump, and is a centrifugal type.

Free air unloaders or head unloaders are a set of fingers that hold open the intake valves on the cylinders to permit the piston not to pump air against a head load, and once the pump is running the fingers retract to allow the pump to function as normal.

Jan 19, 2010 | Air Tools & Compressors

2 Answers

Ingersoll Rand SSR compressor shuts down loaded or unloaded with no alarm, and then shows ready to start . Will not run more than a few minutes either loaded or unloaded. installed meter on incoming power...


When it shuts down, press DISPLAY SELECT button once and use the up down arrows to see the code just before shutdown.

HIGH AIREND TEMP

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LOW SUMP PRESSURE

PRESSURE OR TEMP SENSOR FAIL

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MOTOR OVERLOAD

FAN MOTOR OVERLOAD

STARTER FAULT

I am assuming this has a Intellisys controller.

Aug 25, 2009 | Air Tools & Compressors

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