Pressure Regulation For Hp1300 - Doosan XHP1000WCAT-T4i Operation And Maintenance Manual

Maintenance

Pressure Regulation for HP1300

This machine is equipped with a Dual Pressure Regulation system which allows the unloaded
operating pressure to be changed between two levels. These levels are selectable by a two-
position valve located on the left side of the Separator Tank.
The settings labeled High and Low are factory set at 150 psig for the High pressure and 100
psig for the Low setting.
Regulation normally requires no adjustment, but if proper adjustment is lost, proceed as
follows:
Preparation
1. Operate the compressor to determine if the High (150 psi) or Low (100 psi)
regulator needs adjusting. Rotate the Selector Valve to point to the correct
value High or Low.
2. Locate the Regulator which controls the pressure to be adjusted.
3. Complete all adjustments on this Regulator before making any adjustments to
the other Regulator.
Before Starting
1. At the side of the Separator Tank, at the Pressure Regulator, loosen
adjustment locknut by turning counterclockwise. Turn adjustment screw
counterclockwise one full turn.
After Starting
2. Allow the compressor to warm up, then push Service Air Button on Control
Panel.
3. Open and adjust Service Valve on outside of the compressor to obtain the rated
operating pressure on the Air Pressure Gauge.
NOTE: If the rated operating pressure cannot be maintained with engine
at full load speed, turn the regulator adjustment screw clockwise and
adjust service valve until engine maintains rated full load speed (1800
RPM).
4. Ensure that pressure is maintained at rated pressure, then turn Regulator
Adjustment Screw counterclockwise until engine speed just begins to be
reduced.
NOTE: Turning Regulator Adjustment Screw clockwise will raise
pressure at full speed.
5. Close Service Valve (engine will slow to idle speed).
6. If necessary, repeat Steps 3 and 4.
7. Tighten lock nut at the top of the Pressure Regulator.
Operation & Maintenance Manual
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