Compressor Pilot Valve Differential Pressure Adjustment - Vanguard CPW 125-4-S Series Operation And Maintenance Manual

COMPRESSOR PILOT VALVE PRESSURE ADJUSTMENT
Proceed with the following instructions while compressor is running:
1. Loosen locknut (4) and back off several turns. Do not turn differential pressure adjustment nut (3).
2. Check reading on the tank pressure gauge. Set the compressor maximum pressure by turning
threaded cap (1) clockwise to increase pressure or counter clockwise to decrease pressure.
Pressure setting must be 5 psig less than setting of pressure switch.
3. After pressure is set, tighten locknut (4). Be careful not to move threaded cap (1).

COMPRESSOR PILOT VALVE DIFFERENTIAL PRESSURE ADJUSTMENT

Proceed with the following instructions while compressor is running.
1. Loosen locknut (2) and back off several turns.
2. Check reading on the tank pressure gauge. Set the pressure to 20 psig differential (unload at 245
psig, reload at 225 psig). Turn nut (3) clockwise to increase differential pressure or
counter clockwise to decrease differential pressure.
3. After pressure is set, tighten locknut (2). Be careful not to move nut (3).
B980-B
(Ref. Drawing)
16