1. Before installing the pressure reducing valve, open all the outlets to flush the system and expel any air left in piping 2. Install shut-off valves upstream and downstream to facilitate maintenance operations 3. For a right flow direction, use the arrow stamped on the body 4. pressure reducing valve can be installed in either vertical or horizontal piping. It can be installed also upside down 5. It is equipped with a threaded connection suitable for a pressure gauge. It is possible to unscrew the plug in order to install a pressure gauge in the size of 1/4". 6. In such a position, the pressure gauge shows the downstream pressure of the reducing valve. The whole range of pressure reducing valves are tested and adjusted with a downstream pressure of 3 bar. It is possible to change the downstream pressure by means of the adjusting device
7. The final adjustment of the pressure reducing valve has to be carried out with a filled private water system and with all the outlets shut-off. The upstream pressure has to be at least 1 bar higher than the adjusted pressure. Adjustment of the pressure reducing valve to a downstream pressure different from the pre-adjusted one (3 bar): - Close the downstream shut-off valve - Unscrew the plug (pic.1) - Adjustment is carried out by means of a tool or a screwdriver on the upper part of the device (pic.2); turn in clockwise way to increase the downstream pressure, turn in anticlockwise way to reduce the downstream pressure - Open the outlets in the private water system, in order to check the stability of the adjusted pressure - Adjust the downstream pressure with outlets totally shut-off and with water at room temperature only - Screw the plug(pic.3) - Adjustment procedure is complete once the required pressure appears on the pressure gauge.