none 1-460XL Installation Guide
Contents
1. 2 OUTLET BALL VALVE 8 Slowly open the high side bleed 3 Close the test cock and bleed screw 1 INLET m H needle valve being especially careful 4 Replace the drip canopy BALL VALVE TEST COCK not to drop the pressure differential 5 Slowly open shut off valve 1 and then too fast open shut off valve 2 Troubleshooting PROBLEM POSSIBLE CAUSES Air inlet valve does not open as gauge drops to 0 0 psid 1 Air inlet o ring stuck to bonnet clean o ring and Air inlet valve does not open and differential on gauge will not drop Air inlet opens below 1 0 psid Check valve opens below 1 0 psid ZURN WILKINS bonnet 2 Broken or missing air vent spring Leaking No 1 shut off valve 2 Parallel installation with leaky No 2 shut off valve Dirty or damaged air inlet o ring 2 Scale buildup on bonnet ON Dirty or damaged check disc Damaged seat Hole in diaphragm ZURN WILKINS 1747 Commerce Way Paso Robles CA 93446 Phone 855 663 9876 Fax 805 238 5766 2 IS460XL REV 4 13 www zurn com2. internal compo nents of the pressure vacuum breaker should be removed for the duration of the winter 7 Leave all drain valves 2 amp 6 shut off valves 3 amp 5 and test cock in the half open half closed position 45 for the duration of the winter to prevent freezing Caution Be certain that main shut off 1 remains tightly closed to prevent refilling of the system Also the main shut off valve must be resilient seated to insure no leakage of water into the system 12 MIN ABOVE HIGHEST DIRECTION OF FLOW cS gt WARRANTY ZURN WILKINS Valves are guaranteed against defects of material or workmanship when used for the services recom mended If in any recommended service a defect develops due to material or workmanship and the device is returned freight prepaid to ZURN WILKINS within 12 months from date of purchase it will be repaired or replaced free of charge ZURN WILKINS liability shall be limited to our agreement to repair or replace the valve only Proposition 65 Warning This product contains chemicals known to the State of California to cause cancer or birth defects or other reproductive harm Maintenance Close inlet and outlet shut off valves before disassembling device Remove canopy screw and drip canopy Bleed off pressure by opening the test cock and bleed screw Unscrew the bonnet from the body by turning counterclockwise The drip canopy may be
3. Model 460XL LEAD FREE Spill Resistant Pressure Vacuum Breaker 3 8 1 2 3 4 amp 1 This product contains a weighted average lead content less than 0 25 for wetted surfaces Certified to NSF ANSI 61 G Installation O Testing U Maintenance Instructions INSTALLATION INSTRUCTIONS CAUTION Installation of Pressure Vacuum breakers must be performed by qualified licensed personnel Faulty installation could result in an improperly functioning device The installer should be sure the proper device has been selected for the particular installation ZURN WILKINS Model 460XL Spill Resistant Pressure Vacuum Breakers are for use on potable water lines where a health hazard could exist if a backsiphonage situation were to occur They must not be installed where backpressure may occur Proper performance depends upon following these installation instructions and prevail ing governmental and industry standards and codes Failure to do so releases ZURN WILKINS of any liability that it might otherwise have with respect to that device Such failure could also result in an improperly functioning device 1 2 3 Before installing the ZURN WILKINS Model 460XL Spill Resistant Pressure Vacuum Breaker flush the lines thoroughly to remove all debris chips and other foreign matter The Model 460XL must be installed in a vertical position see Fig 1 to provide proper operation of the air inlet valve Provide adequate space around the
4. S OUTLET SHUT OFF BLEED SCREW 7 OUTLET DRAIN VALVE 6 TEST COCK 4 12 MIN ABOVE HIGHEST OUTLET INLET SHUT OFF VALVE 3 MAIN SHUT OFF VALVE 1 INLET DRAIN __ 44 iz VALVE 2 IF ALLOWED BY DIRECTION OF FLOW gt gt LOCAL CODES DRAIN ZURN WILKINS Drain Procedure for Freeze Protection 1 Turn off main shut off 1 that supplies water to the system 2 Open both the inlet and outlet drain valves in the system 2 amp 6 Open the inlet and outlet ball valves on the Spill Resistant pressure vacuum breaker 3 amp 5 Open the test cock and the bleed screw 4 amp 7 Leave all valves and test cock in the half open half closed 45 position to allow full drainage of the valve and test cock 3 If you blow out the system downstream of the Spill Resistant pressure vacuum breaker make sure the outlet drain valve 6 is open and the Spill Resistant pressure vacuum breaker shut off valve 5 is closed 4 Connect an air hose to the outlet drain valve 6 and inject an adequate volume of air to remove all water from the downstream portion of the system 5 CAUTION Open outlet shut off valve to the pressure vacuum breaker 5 and outlet drain valve 6 to the half open half closed 45 position after blow out process is completed 6 If drain valves 2 amp 6 are not part of the system and if air pressure is not used to plow out the system the
5. e the 2 shut off valve and then the close the 1 shut off valve Open the vent bleed screw Place a small amount of water into the top of the bonnet directly atop the air inlet valve NO Record the pressure differential at which the water in the top of the bonnet begins to drain into the body 9 Open the high side bleed needle valve to lower the pressure to atmospheric 0 0 PSID Verify that the air inlet has fully opened 10 Close the test cock and bleed screw 11 Slowly open 1 shut off valve TEST NO 2 Purpose To determine the static pressure drop across the check valve Requirement The static pressure drop across the check valve must be at least 1 0 PSID 1 Close the 1 shut off valve 2 Slowly open the bleed screw The water in the body will drain out the bleed screw When the flow of water stops the gauge reading will be the static pressure drop across the check valve The gauge reading must be 1 0 PSID or greater Record this value If water continues to flow out the bleed screw then the 1 shut off valve is leaking Va CANOPY SCREW DRIP CANO RYN CHECK SEAT TOOL _ SA BONNET O RING fo PONNET g n VALVE SPRING UPPER CAGE rg AIR VALVE E eb O RING _AIRVALVE L lt Poppet DIAPHRAGM RETAINER B m DIAPHRAGM LOWER CAGE T CHECK a SPRING CHECK POPPET amp CHECK DISK SEAT one Spar SJ __ CARTRIDGE oova O RING BLEED SCREW ND
6. installed unit so that the test cock and bleed screw will be accessible for testing and servicing Install the unit such that the critical level mark on the body is at least 12 inches above the highest downstream piping or water outlet Always consult local codes for installation methods approvals and guidance The Model 460XL Spill Resistant Pressure Vacuum Breaker may be installed out doors only if the device is protected against any freezing conditions Warning do not block air vent opening with insulation Exposure to freezing conditions will result in improper function or damage to the device The installation location must be kept above 33 F PLACING THE DEVICE IN SERVICE After the installation of a Model 460XL Spill Resistant Pressure Vacuum Breaker has been completed place the unit in service as follows 1 2 Fig 1 Start with both shut off valves closed Open the inlet shut off valve until the Spill Resistant Pressure Vacuum Breaker is completely pressurized Immediately after the inlet shut off valve is opened the air inlet valve should close preventing any discharge from occurring If the unit discharges water out the valve refer to MAINTENANCE INSTRUCTIONS If no discharge occurs proceed to step 3 Slowly open the No 2 shut off valve The Model 460XL is now in service After the Model 460XL has been properly installed test the device If the device fails the test refer to MAINTENANCE INSTRUCTION
7. used as a bonnet removal tool Unscrew the upper cage counterclockwise relative to the lower cage allowing access to the diaphragm and air vent poppet Unscrew the check seat from the lower cage using the tool molded into the top of the bonnet labeled CHECK SEAT TOOL Clean all parts with clean water only 1 2 3 4 5 Remove the check cartridge from the assembly by slowly rocking it back and forth within the body 6 7 8 9 After completing inspection replace necessary parts and reassemble Repair kits are available from your supplier Note When threading the upper cage onto the lower cage torque the upper cage by hand until the torque marks on the rim of the upper cage line up with the arrow on the lower cage Testing Procedures TEST NO 1 Purpose To determine the inlet pressure when the air inlet valve opens Requirement The air inlet valve shall open when the inlet pressure is no less than 1 0 PSI above atmospheric pressure and the outlet pressure is atmospheric The air inlet valve shall be fully open when the inlet pressure is reduced to atmospheric 1 Remove the drip canopy 2 Bleed water through the test cock to eliminate any foreign material 3 Install the appropriate fitting to the test cock 4 Install the high side hose of the dif ferential pressure gauge to the test cock Open the test cock and high side bleed valve on the test gauge and bleed the air from the hose and gauge 5 Clos
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