Operating Instructions - Snap-on Equipment

General MaintenanceWater Trap / Filter MaintenanceThe filter located inside the water trap / filter bowl should be checked and, ifnecessary, replaced every two weeks or if low flow exists that will not go away.Also, replace this filter if excessively high HC readings exist that do not go awayafter allowing the pump to run for several minutes.• Some water in the filter bowl is normal and does not affect operation. The filterbowl will, under normal conditions, be approximately half full of water.• To completely empty the filter bowl of water, or if a low flow occurs because ofexcessive water, disconnect hose (A) with the pump running. The water will beremoved automatically.• After a filter change or when the filter is completely dry, the water appears to fillthe water trap. This is normal. Once the filter absorbs moisture you will see thelevel drop to normal. If excess water should ever accumulate, the float in thefilter/water trap assembly automatically shuts down the gas analyzer pump toprotect the sample/gas bench system.ABCDEFGFigure 4-3: Water Trap / FilterABCDEFGGas sample hose connectorFilterSealO-ringAttached O-ringFilter bowlWater drain hose connectorTo replace the water trap filter,1. Remove water drain hose from the bottom of the filter bowl.4-8