Proper Accumulator Tank Pressure
Hi, I have a Shurflo 4008-101-E65 that shows a shut off at 55 psi and a restart at 40 psi. I have a Shurflo 182 accumulator tank, that if I am correct, should be set at 40 psi. That seems rathe...
Forum Discussion
egarant wrote:shastagary wrote:
ACCUMULATOR TANK: Model 182
INSTALLATION MANUAL
Thanks, but I do have those manuals, I'm interested in what the proper set pressure...
Egads man, don't be so lazy, read the manual!
From the manual that was linked above (took me a whole 2 seconds to find the info)..
"RV/MARINE APPLICATIONS WITH PRESSURE SWITCH-CONTROLLED PUMPS
The accumulator contributes to longer pump life, less noise, less amperage draw, and reduced water pulsation.
The most efficient use of the accumulator occurs with the pre-charge set at the SAME pressure as the pump’s pressure switch “turn
on” setting.
Typically, a 45 psi [3 bar] pump will turn on around 30 psi [2.07 bar]. Therefore, the pre-charge should also be 30 psi [2.07 bar]. The pre-charge MUST be set in a “static” condition (pump off and at least one water fixture opened).
Depending on pre-charge pressure to the accumulator, in relation to the pump turn on/off pressures, stored liquid is about
2 to 4 oz. [60-120 ml]. If accumulator tank pre-charge exceeds pump turn on pressure, the liquid volume is reduced."
Simply put, find the TURN ON pressure of YOUR pump, set accumulator pressure to the TURN ON pressure of YOUR PUMP.
Is that clear enough?
