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Failure to do so could result in the internal air valve puncturing or rupturing the bladder. Before you start the pump, charge the surge suppressor with air line pressure. 1. Start the pump to generate system pressure. 2. As pressure increases to approach working pressure, gradually decrease the regulated air supply pressure into the surge suppressor by adjusting the regulator (4) (See Parts Drawings on pages 14 and 15). 3. Wait for up to one minute to allow the system to respond to the adjustment before you make any further adjustments. Generally, pulsation is most effectively minimized when the air supply to the surge suppressor is regulated to 2 to 10 psi (0.01 to 0.07 MPa, 0.1 to 0.7 bar) lower than system pressure. . . Troubleshooting WARNING To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 7. Relieve the pressure before checking or servicing the equipment. Check all possible problems and causes before disassembling the pump. PROBLEM CAUSE SOLUTION Surge suppressor does not hold pressure. Manual or automatic models: –Leaking threaded connections –Loose flange bolts or clamp –Failed bladder or bellows –Blocked air line to unit –Check all threads for leaks. –See Torque Table, page 11. –See Bladder Failure, page 10. –Use 1/4-in air line. Automatic models only: –One-way valve at air inlet is installed backwards. –Gauge shows no pressure, and pump is not running. –Arrow should point toward surge suppressor. –Pressure does not register on gauge until pump is started. Manual models only: –Faulty regulator –Check regulator. Dampening effect of surge suppressor is not sufficient. Surge suppressor installed incorrect distance from pump Surge suppressor should be installed within 10 pipe diameters of pump discharge. Improper pressure charge See Charging and Startup, page 8. Surge suppressor pressure should be 2 to 10 psi (0.01 to 0.07 MPa, 0.1 to 0.7 bar) lower than system pressure. Surge suppressor does not hold pressure charge. See surge suppressor does not hold pressure in PROBLEM column. Failed bladder or bellows See Bladder Failure, page 10. Surge suppressor too small for pump Install larger surge suppressor. Automatic models only: Plugged automatic valve Remove pressure from surge suppressor, and check automatic valve for proper operation as follows: 1. Leave air line attached to top half of surge suppressor. 2. Fill top of surge suppressor with enough water to cover automatic valve. There should be no bubbles. 3. Dump water out, and gently push automatic valve. Air should flow. 4. Replace automatic valve if it is defective. There is leaking around surge suppressor fluid inlet. PTFE sealing tape or paste is needed on threads of fluid inlet. Apply PTFE tape or paste to threads. Do not overtighten plastic models. Hand tightening is recommended. . . Service Bladder Failure Replacing Bladder or Bellows Normal life for bladders can be from a few months to several ...

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