Liebert Challenger 3000 with iCOM

4.3 Water Regulating ValveWater-Cooled Models—Self-Contained CompressorThe water regulating valve automatically regulates the amount of fluid necessary to remove the heatfrom the refrigeration system, permitting more fluid to flow when load conditions are high and lessfluid to flow when load conditions are low. The valve consists of a brass body, balance spring, valveseat, valve disc holders, capillary tube to discharge pressure, and adjusting screw.4.3.1 Standard Valve - 150psig (1034kPa) System for 3 & 5-Ton Units (Johnson Controls Valve)High Pressure Valve - 350psig (2413kPa) System for 5-Ton Units (Johnson Controls Valve)AdjustmentThe valve may be adjusted with a standard refrigeration service valve wrench or screw driver.To lower the head pressure setting, turn the square adjusting screw clockwise until the high pressuregauge indicates the desired setting.To raise the head pressure setting, turn the adjusting screw counterclockwise until the desiredsetting is obtained.Figure 21 Johnson Controls valve adjustmentRangespringValve springguideTopretainerRange adjustment screwInsert screwdrivers underneaththe valve spring guide4.3.2 High Pressure Valve - 350 psig (2413 kPa) System for 3-Ton Units (Metrex Valve)AdjustmentThe valve may be adjusted using a 1/8" diameter rod. Turn the adjusting collar nut counterclockwiseto raise head pressure; turn it clockwise to lower head pressure. Rotation directions are viewed fromtop of valve spring housing.38