Mount the unit in position so that the float mechanism moves vertically and is at an elevation above the pump priming port.
Use noncollapsible hose to connect the unit OUT port to the vacuum source, for example a tee fitting spliced into the vacuum line.
Use noncollapsible hose to connect the unit IN port to the pump priming port, with the provided ball valve in between.
Close the priming line ball valve.
Close the pump discharge valve to prevent air being drawn through the discharge.
Start the vacuum source.
Open the priming line ball valve.
When water enters unit, close priming line ball valve. (Water entering unit indicates pump is primed.)
Start the pump and open the pump discharge valve.
Stop the vacuum source then allow the water to drain from the unit
*NOTE: If water does not flow from discharge, turn your pump OFF and repeat steps 2 through 5. When pump is discharging properly the priming line may be disconnected from primer and the engine providing vacuum turned OFF.
Chamber housing should be kept clean in order to observe the float valve.
*If necessary, remove the unit and flush with water or a mild soap solution. *Do not use any harsh cleanser or chemicals to clean the unit.
Use only soap and water to clean plastic parts.
Do not tighten tie bolts or plastic dome more than necessary to provide seal.
Keep the priming line ball valve closed when manifold primer/water trap not in use.