As title. I've been told I should use one setting if using the system for 1 man and another if there are 2 users. I don't understand what that does. I'm probably asking a dumb question here.
Cheers
Steve
Why calibrate the controller to a pump?
What we are doing is telling the control what the maximum pressure the system normally operates at. To get a good flow at the brush head the system is probably running between 40 - 70 PSI. So the control knows that the normal max level is 70 PSI. When a user stops the water flow the pump will attempt to push against the restriction increasing the pressure above 70 PSI the pump sees this sudden rise and stops the pump. This is what we refer to as DEAD END (DE).
When flow is stopped EG the pole tap is turned off. Two things happen
1. Pressure builds up in the line
2. Current draw by the pump spikes
In normal operation the Pump will draw around 3 – 5 amps with system PSI stable as the system is in open flow. Stopping flow means the pump draws a lot of current very quickly and the system pressure rapidly builds. As above the control see,s this sudden change and stops the pump DE
During this DE (flow stopped period) the controller retests the pressure at the pump every three seconds.
During the DE retest the controller will briefly pulse the pump for a fraction of a second some operators will hear the pump blip. The Controller is designed to carry out this test but importantly it will not allow pressure in the system to build any higher.
When the restriction is removed the pressure falls back below the 70PSI maximum and the controller restarts the pump at the preset flow.
As earlier comments running two poles from one pump will mean the flow is increased and with it both current draw and pressure. The higher the flopw rate the higher calibration will need to be.
running two poles from one pump can also mean that flow to the higher of the two poles is not as good. This is because water will follow the easiest path with the least resistance. The pump may also be working harder than it needs to. Also when the tap is closed on one line flow is stopped to both poles .
Using one pump/controller per pole will give more flexibility for each person to work independently if the other.