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Ingersoll Rand 56288764 Pressure Switch (OEM)

Ingersoll Rand 56288764 Pressure Switch (OEM)

$100.00
Part #: 56288764
$100.00
Availability : SPECIAL ORDER (7-10 Days)
Set at 135-175 PSI with Unloader Elbow and Lever



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Description

Details

CUT-IN & CUT-OUT: The cut-out (compressor shut-down) is the pressure at which the switch contacts open, and the cut-in (compressor restart) is the pressure at which the switch contacts close.


ADJUSTMENT CONTROLS: All pressure switches have a range adjustment control. Some pressure switches also have a differential adjustment control. On switches without a differential adjustment control, the span between cut-in and cut-out pressure levels switches is factory set for 40 ± 4 PSIG and cannot be adjusted.
NOTE: Some pressure switches are equipped with an on-off lever used to open and close the electrical contacts inside the switch. THIS LEVER IS NOT A DIFFERENTIAL ADJUSTMENT CONTROL. The pressure switches with the on-off lever do not have a differential adjustment control.


ADJUSTMENT PROCEDURES (SWITCHES WITHOUT DIFFERENTIAL ADJUSTMENT CONTROL):
1. Remove the pressure switch cover.
2. Adjust the range by turning the range adjustment screw clockwise (in) to increase the cut-out point or counter-clockwise (out) to decrease the cut-out point.
NOTE: One full turn changes the setting approximately 2-6 PSIG.
3. Replace cover, reconnect power supply and start the compressor.
4. Note the pressure gauge reading at which the compressor cuts out.
5. Repeat adjustment procedure if necessary.


ADJUSTMENT PROCEDURES (SWITCHES WITH DIFFERENTIAL ADJUSTMENT CONTROL):
1. Remove the pressure switch cover.
2. Set the cut-in pressure with the range adjustment nut. Turn the nut clockwise (in) to increase the pressure or counter-clockwise (out) to decrease the pressure.
NOTE: One full turn changes the setting approximately 2-6 PSIG.
3. Set the cut-out pressure with the differential adjustment. Turn the differential adjustment nut clockwise (in) to increase the pressure or counter-clockwise (out) to decrease the pressure.
NOTE: One full turn changes the setting approximately 2-6 PSIG.
4. Replace the cover, reconnect the power supply and start the unit.
5. Note the pressure gauge reading at which the unit cuts out.
6. Repeat the adjustment procedure if necessary.


The minimum possible differential is approximately 20% of cutout pressure. It is advisable to have as wide a differential as possible to avoid frequent starting and stopping of the unit. Note the pressure gauge reading at which the unit cuts-out and re-establish this point if necessary. Note the interaction between the range and differential adjustments, i.e., if the cut-out is increased, the differential will also increase, or if the differential is narrowed, the cut-out will be reduced, etc. These
factors must be considered when adjusting the switch and compensated for accordingly.


PRESSURE SWITCH INSTALLATION PRECAUTIONS:
Diaphragm leaks can occur if a new pressure switch is installed improperly. During installation of a new pressure switch, do not tighten the pressure switch by turning the switch body by hand. Putting sideways pressure on the switch body puts stress on the body-to-diaphragm connection and may cause later failure due to vibration, temperature expansion, or pressure.

In addition, do not use the pressure switch assembly as a handle when moving the compressor. This places stress on the body-to-diaphragm connection and can distort internal components.

Failure can occur by putting undue stress on the unloader body while tightening the unloader tubing with a wrench. Do not adjust the orientation of the pressure switch by turning the entire assembly with a wrench placed on the unloader connection.