Answer
Jul 02, 2019 - 02:29 AM
Adjustments to the pressure switch can cause severe overload. The manual states, on page 3, "NOTE: By-pass adjustment should only be performed by a qualify technician with proper gauges and equipment. The by-pass is a spring loaded diaphragm that opens up allowing water from the discharge side back to the inlet side. The by-pass is set to begin opening at about 40 psi and creating full by-pass at about 62 psi. The pressure switch on the pump is set to shut off at 55 psi. If the switch or by-pass are adjusted too much, the by-pass and switch shut-off can overlap and THE PUMP WILL NOT SHUT OFF. Screwing the switch screw in clockwise will raise the shut-off pressure. Unscrewing the switch screw counterclockwise will lower the pump shut-off pressure. Screwing the by-pass screw in will raise the pressure at which the by-pass starts and raise the full by-pass pressure. Unscrewing the by-pass screw counterclockwise will lower the pressure at which by-pass starts and lower the full by-pass pressure. WARNING: If full by-pass is reached before the shut-off setting, the pump will not shut off. Full by-pass pressure setting should be at least 10 psi higher than pump shut off pressure." I will link the manual for the ShurFlo 4008-171-E65, below.
https://www.rvupgradestore.com/v/vspf...
https://www.rvupgradestore.com/v/vspf...
Add New Comment