Pool Systems Automation: Difference between revisions
→Filter Tank Pressure
Matt Parnell (talk | contribs) |
Matt Parnell (talk | contribs) |
||
| Line 28: | Line 28: | ||
==== Filter Tank Pressure ==== | ==== Filter Tank Pressure ==== | ||
Four filter tank pressures are monitored by sensors with internal signal conditioning. When fed by a 24 VDC (each sensor is independently fused), a 1 V to 5 V output corresponds with 0 to 100 PSI of pressure. | |||
A value is considered "valid" if the measured voltage is 1 V or greater (less than 1 V suggests an open circuit or failed sensor). The low and high thresholds are somewhat arbitrary, and based upon observation. A nominal pressure of 10 PSI is assumed (add 8 PSI to the limit per PHTA guidelines for a single-gauge backwash threshold). | |||
{| class="wikitable" | |||
!Qualifier | |||
!Threshold | |||
!Result | |||
!LCD Message | |||
!Stack Light | |||
|- | |||
|Pump Operating | |||
|< 8 PSI | |||
|Pressure Low | |||
|<tt>Flt Tank Pres L</tt> | |||
|Yellow | |||
|- | |||
|Pump Operating | |||
|≥ 8 PSI and < 18 PSI | |||
|Pressure OK | |||
|None | |||
|Green (unless overridden) | |||
|- | |||
|Pump Operating | |||
|≥ 18 PSI | |||
|Pressure High | |||
|<tt>Flt Tank Pres H</tt> | |||
|Yellow | |||
|} | |||
==== Water Flow ==== | ==== Water Flow ==== | ||