- May 30, 2020
- 227
- Pool Size
- 21000
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-60 Plus
... do I do about Filter PSI? I don't know how low is too low.
Last week (Thursday, July 9, 2020), I replaced the 0.75 HP single speed motor on Hayward Super Pump with a V-Green 165 Variable Speed motor. Also replaced the impeller with the 1.5 HP part number. I have scanned the forum and the tutorials on equipment to find information on how the VS might behave with the rest of the system. I found posts about flow rates, turnovers, skimmer operation, spa and feature operation, but I do not recall seeing information on Low DE filter PSI. Now I'm trying to figure out my minimum RPM operation so I can start to see those massive kWh savings!
With the SS motor, clean DE filter startup pressure over the years has consistently been about 6.5 PSI on the Hayward "eye test" gauge. I had (what I believed to be) good flow through the skimmer and decent return at the eyeballs. I typically run the single suction valve set 50% skim, 50% bottom.
The V-Green VS motor primes at 2600 RPM for 3 minutes. First startup was approximately 6 PSI (old gauge). I thought I was doing fine. Began to play with speeds. Tried Speed 1 at 1600 RPM: PSI=0, skimmer didn't seem to be flowing. Changed Speed 1 to 2100 RPM: PSI=0, skimmer looked to be moving very slowly, champagne bubbles out of the returns. Tapped on the gauge, PSI read about 3.5 (time to replace gauge, ordered new Glycerin Filled one from TFTestkits). Installed the new gauge and redid the pump inlet and filter outlet connections with TFE tape and lube yesterday, no more return bubbles at 2100 RPM.
Current Filter PSI (new gauge):
2600 RPM (Prime) = 7
2350 RPM = 6
2100 RPM = 4
There are many references to maximum specifications, but how do I find a minimum pump speed and know that there is sufficient flow through the filter?
Last week (Thursday, July 9, 2020), I replaced the 0.75 HP single speed motor on Hayward Super Pump with a V-Green 165 Variable Speed motor. Also replaced the impeller with the 1.5 HP part number. I have scanned the forum and the tutorials on equipment to find information on how the VS might behave with the rest of the system. I found posts about flow rates, turnovers, skimmer operation, spa and feature operation, but I do not recall seeing information on Low DE filter PSI. Now I'm trying to figure out my minimum RPM operation so I can start to see those massive kWh savings!
With the SS motor, clean DE filter startup pressure over the years has consistently been about 6.5 PSI on the Hayward "eye test" gauge. I had (what I believed to be) good flow through the skimmer and decent return at the eyeballs. I typically run the single suction valve set 50% skim, 50% bottom.
The V-Green VS motor primes at 2600 RPM for 3 minutes. First startup was approximately 6 PSI (old gauge). I thought I was doing fine. Began to play with speeds. Tried Speed 1 at 1600 RPM: PSI=0, skimmer didn't seem to be flowing. Changed Speed 1 to 2100 RPM: PSI=0, skimmer looked to be moving very slowly, champagne bubbles out of the returns. Tapped on the gauge, PSI read about 3.5 (time to replace gauge, ordered new Glycerin Filled one from TFTestkits). Installed the new gauge and redid the pump inlet and filter outlet connections with TFE tape and lube yesterday, no more return bubbles at 2100 RPM.
Current Filter PSI (new gauge):
2600 RPM (Prime) = 7
2350 RPM = 6
2100 RPM = 4
There are many references to maximum specifications, but how do I find a minimum pump speed and know that there is sufficient flow through the filter?