AUTOMATIC VALVESTM 10-4610-232-34Table 2-1. Direct Support Troubleshooting Guide (Continued)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTIONNOTE (MODEL WTA-060 ONLY)The automatic valves on the ROWPU are sping loaded open and air pressure closed. Theelectrical system controls whether air is, or, is not supplied to the valve. In the event of anelectrical circuit or air system failure the valves will automatically open. The actualposition of a valve can be determined by removing the plastic valve cap and observingthe position of the stem: if the stem isextended out from the top of theactuator housing,it is closed; if it is sitting on the top of the actuator housing, it is open.CAUTION (MODEL WTA-060 ONLY)Whenever an automatic valve assembly (valve and actuator) is removed from the pipingit must be reinstalled with the valve disc open. Attach the air tubing and electricalconnector after the valve assembly is installed in the piping, If the actuator is removedfrom the valve it must be reinstalled with its air and electrical connection removed from it.Additionally, the maintainer must determine that the valve itself is open. This can be doneeither by removing the valve from the piping to check it, or, by looking at the bottom ofthe valve housing and noting the position of thegroove on the end of the valve stem. Thegroove is in alignment with the inner valve disc. Turn the square end of the valve stem aquarter turn to make the groove point towards the inlet/outlet openings on the valve andthen install the actuator. Failure to follow these procedures will result in the valveoperating opposite to what it was meant to do in the system.CAUTION(MODEL ROWPU-1 ONLY)Whenever an automatic valve assembly (valve and actuator) is removed from the piping,it must be reinstalled with the valve disc open. Attach the air tubing and electricalconnector after the valve assembly is installed in the piping.If the actuator is removedfrom the valve it must be reinstalled with its air and electrical connection removed fromit. Additionally, the maintainer must determine whether the valve itself is open. Theactual position of the valve can be determined by looking at the position indicator at thebottom of the actuator.NOTE(MODEL ROWPU-1 ONLY)The automatic valves on the ROWPU are spring loaded open and air pressure closed.The electrical system controls whether air is, or, is not supplied to the valve. In the eventof an electrical circuit or system failure the valves will automatically open. The actualposition of the valve can be determined by looking at the position indicator at the bottomof the actuator.2-34Change 3
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